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alistair23-linux/arch/sparc/kernel/entry.S

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[SPARC32]: Fix modular build of floppy driver. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-02 01:19:14 -06:00
/* arch/sparc/kernel/entry.S: Sparc trap low-level entry points.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
*
[SPARC32]: Fix modular build of floppy driver. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-02 01:19:14 -06:00
* Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1996-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 Anton Blanchard (anton@progsoc.uts.edu.au)
*/
sparc32: Implement hard_smp_processor_id() via instruction patching. This is the last non-trivial user of btfixup. Like sparc64, use a special patch section to resolve the various implementations of how to read the current CPU's ID when we don't have current_thread_info()->cpu necessarily available. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Sam Ravnborg <sam@ravnborg.org>
2012-05-14 00:09:04 -06:00
#include <linux/linkage.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <linux/errno.h>
#include <asm/head.h>
#include <asm/asi.h>
#include <asm/smp.h>
#include <asm/contregs.h>
#include <asm/ptrace.h>
kbuild: arm26,sparc use generic asm-offset support Rename all includes to use asm-offsets.h to match generic name Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2005-09-09 12:35:55 -06:00
#include <asm/asm-offsets.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <asm/psr.h>
#include <asm/vaddrs.h>
#include <asm/page.h>
sparc: export openprom.h to userspace sparc64 exports openprom.h to userspace so let sparc follow the example. As openprom.h pulled in another not-for-export vaddrs.h header file it required a few changes to fix the build. The definition af VMALLOC_* were moved to pgtable as this is where sparc64 has them. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-06-13 12:20:54 -06:00
#include <asm/pgtable.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <asm/winmacro.h>
#include <asm/signal.h>
#include <asm/obio.h>
#include <asm/mxcc.h>
#include <asm/thread_info.h>
#include <asm/param.h>
[SPARC]: Fix robust futex syscalls and wire up migrate_pages. When I added the entries for the robust futex syscall entries, I forgot to bump NR_SYSCALLS. The current situation is error-prone because NR_SYSCALLS lives in entry.S where the system call limit checks are enforced. Move the definition to asm/unistd.h in order to make this mistake much more difficult to make. And wire up sys_migrate_pages since the powerpc folks implemented the compat wrapper for us. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-11-05 17:51:03 -07:00
#include <asm/unistd.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <asm/asmmacro.h>
#define curptr g6
/* These are just handy. */
#define _SV save %sp, -STACKFRAME_SZ, %sp
#define _RS restore
#define FLUSH_ALL_KERNEL_WINDOWS \
_SV; _SV; _SV; _SV; _SV; _SV; _SV; \
_RS; _RS; _RS; _RS; _RS; _RS; _RS;
.text
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
#ifdef CONFIG_KGDB
.align 4
.globl arch_kgdb_breakpoint
.type arch_kgdb_breakpoint,#function
arch_kgdb_breakpoint:
ta 0x7d
retl
nop
.size arch_kgdb_breakpoint,.-arch_kgdb_breakpoint
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#endif
[SPARC32]: Fix modular build of floppy driver. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-02 01:19:14 -06:00
#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.align 4
.globl floppy_hardint
floppy_hardint:
/*
* This code cannot touch registers %l0 %l1 and %l2
* because SAVE_ALL depends on their values. It depends
* on %l3 also, but we regenerate it before a call.
* Other registers are:
* %l3 -- base address of fdc registers
* %l4 -- pdma_vaddr
* %l5 -- scratch for ld/st address
* %l6 -- pdma_size
* %l7 -- scratch [floppy byte, ld/st address, aux. data]
*/
/* Do we have work to do? */
sethi %hi(doing_pdma), %l7
ld [%l7 + %lo(doing_pdma)], %l7
cmp %l7, 0
be floppy_dosoftint
nop
/* Load fdc register base */
sethi %hi(fdc_status), %l3
ld [%l3 + %lo(fdc_status)], %l3
/* Setup register addresses */
sethi %hi(pdma_vaddr), %l5 ! transfer buffer
ld [%l5 + %lo(pdma_vaddr)], %l4
sethi %hi(pdma_size), %l5 ! bytes to go
ld [%l5 + %lo(pdma_size)], %l6
next_byte:
ldub [%l3], %l7
andcc %l7, 0x80, %g0 ! Does fifo still have data
bz floppy_fifo_emptied ! fifo has been emptied...
andcc %l7, 0x20, %g0 ! in non-dma mode still?
bz floppy_overrun ! nope, overrun
andcc %l7, 0x40, %g0 ! 0=write 1=read
bz floppy_write
sub %l6, 0x1, %l6
/* Ok, actually read this byte */
ldub [%l3 + 1], %l7
orcc %g0, %l6, %g0
stb %l7, [%l4]
bne next_byte
add %l4, 0x1, %l4
b floppy_tdone
nop
floppy_write:
/* Ok, actually write this byte */
ldub [%l4], %l7
orcc %g0, %l6, %g0
stb %l7, [%l3 + 1]
bne next_byte
add %l4, 0x1, %l4
/* fall through... */
floppy_tdone:
sethi %hi(pdma_vaddr), %l5
st %l4, [%l5 + %lo(pdma_vaddr)]
sethi %hi(pdma_size), %l5
st %l6, [%l5 + %lo(pdma_size)]
/* Flip terminal count pin */
set auxio_register, %l7
ld [%l7], %l7
sparc32: Remove sun4c floppy assembler. There were two blocks of code for the two ways to twiddle the terminal count pin in the AUXIO register, one for sun4c and one for sun4m. Kill the former. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 21:59:57 -06:00
ldub [%l7], %l5
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
or %l5, 0xc2, %l5
stb %l5, [%l7]
andn %l5, 0x02, %l5
2:
/* Kill some time so the bits set */
WRITE_PAUSE
WRITE_PAUSE
stb %l5, [%l7]
/* Prevent recursion */
sethi %hi(doing_pdma), %l7
b floppy_dosoftint
st %g0, [%l7 + %lo(doing_pdma)]
/* We emptied the FIFO, but we haven't read everything
* as of yet. Store the current transfer address and
* bytes left to read so we can continue when the next
* fast IRQ comes in.
*/
floppy_fifo_emptied:
sethi %hi(pdma_vaddr), %l5
st %l4, [%l5 + %lo(pdma_vaddr)]
sethi %hi(pdma_size), %l7
st %l6, [%l7 + %lo(pdma_size)]
/* Restore condition codes */
wr %l0, 0x0, %psr
WRITE_PAUSE
jmp %l1
rett %l2
floppy_overrun:
sethi %hi(pdma_vaddr), %l5
st %l4, [%l5 + %lo(pdma_vaddr)]
sethi %hi(pdma_size), %l5
st %l6, [%l5 + %lo(pdma_size)]
/* Prevent recursion */
sethi %hi(doing_pdma), %l7
st %g0, [%l7 + %lo(doing_pdma)]
/* fall through... */
floppy_dosoftint:
rd %wim, %l3
SAVE_ALL
/* Set all IRQs off. */
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
mov 11, %o0 ! floppy irq level (unused anyway)
mov %g0, %o1 ! devid is not used in fast interrupts
call sparc_floppy_irq
add %sp, STACKFRAME_SZ, %o2 ! struct pt_regs *regs
RESTORE_ALL
#endif /* (CONFIG_BLK_DEV_FD) */
/* Bad trap handler */
.globl bad_trap_handler
bad_trap_handler:
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0 ! pt_regs
call do_hw_interrupt
mov %l7, %o1 ! trap number
RESTORE_ALL
/* For now all IRQ's not registered get sent here. handler_irq() will
* see if a routine is registered to handle this interrupt and if not
* it will say so on the console.
*/
.align 4
.globl real_irq_entry, patch_handler_irq
real_irq_entry:
SAVE_ALL
#ifdef CONFIG_SMP
.globl patchme_maybe_smp_msg
sparc32, sun4m: bugfix in SMP IPI traphandler Three new IPIs were introduced by commit ecbc42b70acbc6327adefe9635db93fcf62bf59d ("sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines"), the old handler was already prepared for IPIs but handled only IRQ14 and IRQ13, this patch adds support for the new IPI at IRQ12. The IPI trap handler looks at the mask rather than the pending IRQ/IPI, this bug may have masked the problem above, introduced by the same commit. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-08 20:54:08 -06:00
cmp %l7, 11
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
patchme_maybe_smp_msg:
bgu maybe_smp4m_msg
nop
#endif
real_irq_continue:
or %l0, PSR_PIL, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
mov %l7, %o0 ! irq level
patch_handler_irq:
call handler_irq
add %sp, STACKFRAME_SZ, %o1 ! pt_regs ptr
or %l0, PSR_PIL, %g2 ! restore PIL after handler_irq
wr %g2, PSR_ET, %psr ! keep ET up
WRITE_PAUSE
RESTORE_ALL
#ifdef CONFIG_SMP
/* SMP per-cpu ticker interrupts are handled specially. */
smp4m_ticker:
bne real_irq_continue+4
or %l0, PSR_PIL, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
call smp4m_percpu_timer_interrupt
add %sp, STACKFRAME_SZ, %o0
wr %l0, PSR_ET, %psr
WRITE_PAUSE
RESTORE_ALL
sparc32: Move GET_PROCESSOR*_ID() out of asm/asmmacro.h GET_PROCESSOR4D_ID is completely unused, so delete it. Move GET_PROCESSOR4M_ID to the sun4m specific trap code which uses it. We now no longer need to include asm/asi.h Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 22:22:11 -06:00
#define GET_PROCESSOR4M_ID(reg) \
rd %tbr, %reg; \
srl %reg, 12, %reg; \
and %reg, 3, %reg;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/* Here is where we check for possible SMP IPI passed to us
* on some level other than 15 which is the NMI and only used
* for cross calls. That has a separate entry point below.
sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines Implement the three IPIs (resched, single and cpu-mask) generation and interrupt handler catch. The sun4m has 15 soft-IRQs and three of them is used with this patch, the three IPIs was previously implemented with the cross-call IRQ15 which does not work with locking routines such as spinlocks because IRQ15 is NMI, it may cause deadlock. The IRQ trap handler code assumes (in the same spritit as the old it seems) that hard interrupts will be generated until handled (level), when a IRQ happens the IRQ pending register is checked for pending soft-IRQs. When both hard and soft IRQ happens at the same time only soft-IRQs are handled. The old code implemented a soft-IRQ traphandler at IRQ14 which called smp_reschedule_irq which in turn called set_need_resched. It seems to be an old relic and is replaced with the interrupt traphander exit code RESTORE_ALL, it calls schedule() when appropriate. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-01 18:08:53 -06:00
*
* IPIs are sent on Level 12, 13 and 14. See IRQ_IPI_*.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
*/
maybe_smp4m_msg:
GET_PROCESSOR4M_ID(o3)
sparc32: Use PROM device probing for sun4m irq registers. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 22:17:43 -06:00
sethi %hi(sun4m_irq_percpu), %l5
sll %o3, 2, %o3
or %l5, %lo(sun4m_irq_percpu), %o5
sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines Implement the three IPIs (resched, single and cpu-mask) generation and interrupt handler catch. The sun4m has 15 soft-IRQs and three of them is used with this patch, the three IPIs was previously implemented with the cross-call IRQ15 which does not work with locking routines such as spinlocks because IRQ15 is NMI, it may cause deadlock. The IRQ trap handler code assumes (in the same spritit as the old it seems) that hard interrupts will be generated until handled (level), when a IRQ happens the IRQ pending register is checked for pending soft-IRQs. When both hard and soft IRQ happens at the same time only soft-IRQs are handled. The old code implemented a soft-IRQ traphandler at IRQ14 which called smp_reschedule_irq which in turn called set_need_resched. It seems to be an old relic and is replaced with the interrupt traphander exit code RESTORE_ALL, it calls schedule() when appropriate. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-01 18:08:53 -06:00
sethi %hi(0x70000000), %o2 ! Check all soft-IRQs
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
ld [%o5 + %o3], %o1
sparc32: Use PROM device probing for sun4m irq registers. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 22:17:43 -06:00
ld [%o1 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
andcc %o3, %o2, %g0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
be,a smp4m_ticker
cmp %l7, 14
sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines Implement the three IPIs (resched, single and cpu-mask) generation and interrupt handler catch. The sun4m has 15 soft-IRQs and three of them is used with this patch, the three IPIs was previously implemented with the cross-call IRQ15 which does not work with locking routines such as spinlocks because IRQ15 is NMI, it may cause deadlock. The IRQ trap handler code assumes (in the same spritit as the old it seems) that hard interrupts will be generated until handled (level), when a IRQ happens the IRQ pending register is checked for pending soft-IRQs. When both hard and soft IRQ happens at the same time only soft-IRQs are handled. The old code implemented a soft-IRQ traphandler at IRQ14 which called smp_reschedule_irq which in turn called set_need_resched. It seems to be an old relic and is replaced with the interrupt traphander exit code RESTORE_ALL, it calls schedule() when appropriate. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-01 18:08:53 -06:00
/* Soft-IRQ IPI */
st %o2, [%o1 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x70000000
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
WRITE_PAUSE
sparc32: Use PROM device probing for sun4m irq registers. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 22:17:43 -06:00
ld [%o1 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
sparc: sun4m SMP: fix wrong shift instruction in IPI handler This shift instruction appears to be shifting in the wrong direction. Without this change, my SparcStation-20MP hangs just after bringing up the second CPU: Entering SMP Mode... Starting CPU 2 at f02b4e90 Brought up 2 CPUs Total of 2 processors activated (99.52 BogoMIPS). *** stuck *** Signed-off-by: Will Simoneau <simoneau@ele.uri.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-16 11:45:12 -06:00
srl %o3, 28, %o2 ! shift for simpler checks below
sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines Implement the three IPIs (resched, single and cpu-mask) generation and interrupt handler catch. The sun4m has 15 soft-IRQs and three of them is used with this patch, the three IPIs was previously implemented with the cross-call IRQ15 which does not work with locking routines such as spinlocks because IRQ15 is NMI, it may cause deadlock. The IRQ trap handler code assumes (in the same spritit as the old it seems) that hard interrupts will be generated until handled (level), when a IRQ happens the IRQ pending register is checked for pending soft-IRQs. When both hard and soft IRQ happens at the same time only soft-IRQs are handled. The old code implemented a soft-IRQ traphandler at IRQ14 which called smp_reschedule_irq which in turn called set_need_resched. It seems to be an old relic and is replaced with the interrupt traphander exit code RESTORE_ALL, it calls schedule() when appropriate. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-01 18:08:53 -06:00
maybe_smp4m_msg_check_single:
andcc %o2, 0x1, %g0
beq,a maybe_smp4m_msg_check_mask
andcc %o2, 0x2, %g0
call smp_call_function_single_interrupt
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
nop
sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines Implement the three IPIs (resched, single and cpu-mask) generation and interrupt handler catch. The sun4m has 15 soft-IRQs and three of them is used with this patch, the three IPIs was previously implemented with the cross-call IRQ15 which does not work with locking routines such as spinlocks because IRQ15 is NMI, it may cause deadlock. The IRQ trap handler code assumes (in the same spritit as the old it seems) that hard interrupts will be generated until handled (level), when a IRQ happens the IRQ pending register is checked for pending soft-IRQs. When both hard and soft IRQ happens at the same time only soft-IRQs are handled. The old code implemented a soft-IRQ traphandler at IRQ14 which called smp_reschedule_irq which in turn called set_need_resched. It seems to be an old relic and is replaced with the interrupt traphander exit code RESTORE_ALL, it calls schedule() when appropriate. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-01 18:08:53 -06:00
andcc %o2, 0x2, %g0
maybe_smp4m_msg_check_mask:
beq,a maybe_smp4m_msg_check_resched
andcc %o2, 0x4, %g0
call smp_call_function_interrupt
nop
andcc %o2, 0x4, %g0
maybe_smp4m_msg_check_resched:
/* rescheduling is done in RESTORE_ALL regardless, but incr stats */
beq,a maybe_smp4m_msg_out
nop
call smp_resched_interrupt
nop
maybe_smp4m_msg_out:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
RESTORE_ALL
.align 4
sparc32: Restore SMP build and rectify sun4m NMI when non-SMP. The non-SMP sun4m NMI handler was still accessing SUN4C registers. Fix that and share the sun4m NMI trap code between SMP and non-SMP cases. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 22:23:05 -06:00
.globl linux_trap_ipi15_sun4m
linux_trap_ipi15_sun4m:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
SAVE_ALL
sethi %hi(0x80000000), %o2
GET_PROCESSOR4M_ID(o0)
sparc32: Use PROM device probing for sun4m irq registers. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 22:17:43 -06:00
sethi %hi(sun4m_irq_percpu), %l5
or %l5, %lo(sun4m_irq_percpu), %o5
sll %o0, 2, %o0
ld [%o5 + %o0], %o5
ld [%o5 + 0x00], %o3 ! sun4m_irq_percpu[cpu]->pending
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
andcc %o3, %o2, %g0
sparc32: Restore SMP build and rectify sun4m NMI when non-SMP. The non-SMP sun4m NMI handler was still accessing SUN4C registers. Fix that and share the sun4m NMI trap code between SMP and non-SMP cases. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 22:23:05 -06:00
be sun4m_nmi_error ! Must be an NMI async memory error
sparc32: Use PROM device probing for sun4m irq registers. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 22:17:43 -06:00
st %o2, [%o5 + 0x04] ! sun4m_irq_percpu[cpu]->clear=0x80000000
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
WRITE_PAUSE
sparc32: Use PROM device probing for sun4m irq registers. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-19 22:17:43 -06:00
ld [%o5 + 0x00], %g0 ! sun4m_irq_percpu[cpu]->pending
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call smp4m_cross_call_irq
nop
b ret_trap_lockless_ipi
clr %l6
.globl smp4d_ticker
/* SMP per-cpu ticker interrupts are handled specially. */
smp4d_ticker:
SAVE_ALL
or %l0, PSR_PIL, %g2
sethi %hi(CC_ICLR), %o0
sethi %hi(1 << 14), %o1
or %o0, %lo(CC_ICLR), %o0
stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 14 in MXCC's ICLR */
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
call smp4d_percpu_timer_interrupt
add %sp, STACKFRAME_SZ, %o0
wr %l0, PSR_ET, %psr
WRITE_PAUSE
RESTORE_ALL
.align 4
.globl linux_trap_ipi15_sun4d
linux_trap_ipi15_sun4d:
SAVE_ALL
sethi %hi(CC_BASE), %o4
sethi %hi(MXCC_ERR_ME|MXCC_ERR_PEW|MXCC_ERR_ASE|MXCC_ERR_PEE), %o2
or %o4, (CC_EREG - CC_BASE), %o0
ldda [%o0] ASI_M_MXCC, %o0
andcc %o0, %o2, %g0
bne 1f
sethi %hi(BB_STAT2), %o2
lduba [%o2] ASI_M_CTL, %o2
andcc %o2, BB_STAT2_MASK, %g0
bne 2f
or %o4, (CC_ICLR - CC_BASE), %o0
sethi %hi(1 << 15), %o1
stha %o1, [%o0] ASI_M_MXCC /* Clear PIL 15 in MXCC's ICLR */
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call smp4d_cross_call_irq
nop
b ret_trap_lockless_ipi
clr %l6
1: /* MXCC error */
2: /* BB error */
/* Disable PIL 15 */
set CC_IMSK, %l4
lduha [%l4] ASI_M_MXCC, %l5
sethi %hi(1 << 15), %l7
or %l5, %l7, %l5
stha %l5, [%l4] ASI_M_MXCC
/* FIXME */
1: b,a 1b
sparc32,leon: Implemented SMP IPIs for LEON CPU This patch implements SMP IPIs on LEON using software generated IRQs to signal between CPUs. The IPI IRQ number is set by using the ipi_num property in the device tree, or defaults to 13. LEON SMP systems should reserve IRQ 13 (and IRQ 15) to Linux in order for the defaults to work. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-01 18:08:52 -06:00
.globl smpleon_ipi
.extern leon_ipi_interrupt
/* SMP per-cpu IPI interrupts are handled specially. */
smpleon_ipi:
SAVE_ALL
or %l0, PSR_PIL, %g2
wr %g2, 0x0, %psr
WRITE_PAUSE
wr %g2, PSR_ET, %psr
WRITE_PAUSE
call leonsmp_ipi_interrupt
add %sp, STACKFRAME_SZ, %o1 ! pt_regs
wr %l0, PSR_ET, %psr
WRITE_PAUSE
RESTORE_ALL
sparc,leon: Sparc-Leon SMP support Support SMP for a Sparc-Leon multiprocessor system. Add Leon specific SMP code to arch/sparc/kernel/leon_smp.c. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-31 16:08:13 -06:00
.align 4
.globl linux_trap_ipi15_leon
linux_trap_ipi15_leon:
SAVE_ALL
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call leon_cross_call_irq
nop
b ret_trap_lockless_ipi
clr %l6
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#endif /* CONFIG_SMP */
/* This routine handles illegal instructions and privileged
* instruction attempts from user code.
*/
.align 4
.globl bad_instruction
bad_instruction:
sethi %hi(0xc1f80000), %l4
ld [%l1], %l5
sethi %hi(0x81d80000), %l7
and %l5, %l4, %l5
cmp %l5, %l7
be 1f
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_illegal_instruction
mov %l0, %o3
RESTORE_ALL
1: /* unimplemented flush - just skip */
jmpl %l2, %g0
rett %l2 + 4
.align 4
.globl priv_instruction
priv_instruction:
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_priv_instruction
mov %l0, %o3
RESTORE_ALL
/* This routine handles unaligned data accesses. */
.align 4
.globl mna_handler
mna_handler:
andcc %l0, PSR_PS, %g0
be mna_fromuser
nop
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
ld [%l1], %o1
call kernel_unaligned_trap
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
mna_fromuser:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
ld [%l1], %o1
call user_unaligned_trap
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
/* This routine handles floating point disabled traps. */
.align 4
.globl fpd_trap_handler
fpd_trap_handler:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_fpd_trap
mov %l0, %o3
RESTORE_ALL
/* This routine handles Floating Point Exceptions. */
.align 4
.globl fpe_trap_handler
fpe_trap_handler:
set fpsave_magic, %l5
cmp %l1, %l5
be 1f
sethi %hi(fpsave), %l5
or %l5, %lo(fpsave), %l5
cmp %l1, %l5
bne 2f
sethi %hi(fpsave_catch2), %l5
or %l5, %lo(fpsave_catch2), %l5
wr %l0, 0x0, %psr
WRITE_PAUSE
jmp %l5
rett %l5 + 4
1:
sethi %hi(fpsave_catch), %l5
or %l5, %lo(fpsave_catch), %l5
wr %l0, 0x0, %psr
WRITE_PAUSE
jmp %l5
rett %l5 + 4
2:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call do_fpe_trap
mov %l0, %o3
RESTORE_ALL
/* This routine handles Tag Overflow Exceptions. */
.align 4
.globl do_tag_overflow
do_tag_overflow:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_tag_overflow
mov %l0, %o3
RESTORE_ALL
/* This routine handles Watchpoint Exceptions. */
.align 4
.globl do_watchpoint
do_watchpoint:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_watchpoint
mov %l0, %o3
RESTORE_ALL
/* This routine handles Register Access Exceptions. */
.align 4
.globl do_reg_access
do_reg_access:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_reg_access
mov %l0, %o3
RESTORE_ALL
/* This routine handles Co-Processor Disabled Exceptions. */
.align 4
.globl do_cp_disabled
do_cp_disabled:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_cp_disabled
mov %l0, %o3
RESTORE_ALL
/* This routine handles Co-Processor Exceptions. */
.align 4
.globl do_cp_exception
do_cp_exception:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_cp_exception
mov %l0, %o3
RESTORE_ALL
/* This routine handles Hardware Divide By Zero Exceptions. */
.align 4
.globl do_hw_divzero
do_hw_divzero:
SAVE_ALL
wr %l0, PSR_ET, %psr ! re-enable traps
WRITE_PAUSE
add %sp, STACKFRAME_SZ, %o0
mov %l1, %o1
mov %l2, %o2
call handle_hw_divzero
mov %l0, %o3
RESTORE_ALL
.align 4
.globl do_flush_windows
do_flush_windows:
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
andcc %l0, PSR_PS, %g0
bne dfw_kernel
nop
call flush_user_windows
nop
/* Advance over the trap instruction. */
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1
add %l1, 0x4, %l2
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
RESTORE_ALL
.globl flush_patch_one
/* We get these for debugging routines using __builtin_return_address() */
dfw_kernel:
flush_patch_one:
FLUSH_ALL_KERNEL_WINDOWS
/* Advance over the trap instruction. */
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1
add %l1, 0x4, %l2
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
RESTORE_ALL
/* The getcc software trap. The user wants the condition codes from
* the %psr in register %g1.
*/
.align 4
.globl getcc_trap_handler
getcc_trap_handler:
srl %l0, 20, %g1 ! give user
and %g1, 0xf, %g1 ! only ICC bits in %psr
jmp %l2 ! advance over trap instruction
rett %l2 + 0x4 ! like this...
/* The setcc software trap. The user has condition codes in %g1
* that it would like placed in the %psr. Be careful not to flip
* any unintentional bits!
*/
.align 4
.globl setcc_trap_handler
setcc_trap_handler:
sll %g1, 0x14, %l4
set PSR_ICC, %l5
andn %l0, %l5, %l0 ! clear ICC bits in %psr
and %l4, %l5, %l4 ! clear non-ICC bits in user value
or %l4, %l0, %l4 ! or them in... mix mix mix
wr %l4, 0x0, %psr ! set new %psr
WRITE_PAUSE ! TI scumbags...
jmp %l2 ! advance over trap instruction
rett %l2 + 0x4 ! like this...
sparc32: Restore SMP build and rectify sun4m NMI when non-SMP. The non-SMP sun4m NMI handler was still accessing SUN4C registers. Fix that and share the sun4m NMI trap code between SMP and non-SMP cases. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 22:23:05 -06:00
sun4m_nmi_error:
/* NMI async memory error handling. */
sethi %hi(0x80000000), %l4
sethi %hi(sun4m_irq_global), %o5
ld [%o5 + %lo(sun4m_irq_global)], %l5
st %l4, [%l5 + 0x0c] ! sun4m_irq_global->mask_set=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call sun4m_nmi
nop
st %l4, [%l5 + 0x08] ! sun4m_irq_global->mask_clear=0x80000000
WRITE_PAUSE
ld [%l5 + 0x00], %g0 ! sun4m_irq_global->pending
WRITE_PAUSE
RESTORE_ALL
sparc32: drop sun4c support Machines with sun4c support are very rare these days, and noone is using them for any practical purposes. The sun4c support has been know broken for quite some time too. So rather than trying to keep it up-to-date, lets get rid of it. This allows us to do some very welcome cleanup of sparc32 support. Updated the former sun4c specifc nmi (which was also used for sun4m UP) to be a generic UP NMI. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 05:35:04 -06:00
#ifndef CONFIG_SMP
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.align 4
sparc32: Restore SMP build and rectify sun4m NMI when non-SMP. The non-SMP sun4m NMI handler was still accessing SUN4C registers. Fix that and share the sun4m NMI trap code between SMP and non-SMP cases. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 22:23:05 -06:00
.globl linux_trap_ipi15_sun4m
linux_trap_ipi15_sun4m:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
SAVE_ALL
sparc32: Restore SMP build and rectify sun4m NMI when non-SMP. The non-SMP sun4m NMI handler was still accessing SUN4C registers. Fix that and share the sun4m NMI trap code between SMP and non-SMP cases. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 22:23:05 -06:00
ba sun4m_nmi_error
nop
sparc32: drop sun4c support Machines with sun4c support are very rare these days, and noone is using them for any practical purposes. The sun4c support has been know broken for quite some time too. So rather than trying to keep it up-to-date, lets get rid of it. This allows us to do some very welcome cleanup of sparc32 support. Updated the former sun4c specifc nmi (which was also used for sun4m UP) to be a generic UP NMI. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 05:35:04 -06:00
#endif /* CONFIG_SMP */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.align 4
.globl srmmu_fault
srmmu_fault:
mov 0x400, %l5
mov 0x300, %l4
sparc32: introduce support for run-time patching for all shared assembler code All users of MMUREGS ASI in kernel/ now uses run-time patching. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Daniel Hellstrom <daniel@gaisler.com> Cc: Konrad Eisele <konrad@gaisler.com>
2012-05-25 15:20:16 -06:00
LEON_PI(lda [%l5] ASI_LEON_MMUREGS, %l6) ! read sfar first
SUN_PI_(lda [%l5] ASI_M_MMUREGS, %l6) ! read sfar first
LEON_PI(lda [%l4] ASI_LEON_MMUREGS, %l5) ! read sfsr last
SUN_PI_(lda [%l4] ASI_M_MMUREGS, %l5) ! read sfsr last
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
andn %l6, 0xfff, %l6
srl %l5, 6, %l5 ! and encode all info into l7
and %l5, 2, %l5
or %l5, %l6, %l6
or %l6, %l7, %l7 ! l7 = [addr,write,txtfault]
SAVE_ALL
mov %l7, %o1
mov %l7, %o2
and %o1, 1, %o1 ! arg2 = text_faultp
mov %l7, %o3
and %o2, 2, %o2 ! arg3 = writep
andn %o3, 0xfff, %o3 ! arg4 = faulting address
wr %l0, PSR_ET, %psr
WRITE_PAUSE
call do_sparc_fault
add %sp, STACKFRAME_SZ, %o0 ! arg1 = pt_regs ptr
RESTORE_ALL
.align 4
.globl sys_nis_syscall
sys_nis_syscall:
mov %o7, %l5
add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
call c_sys_nis_syscall
mov %l5, %o7
[SPARC]: Remove SunOS and Solaris binary support. As per Documentation/feature-removal-schedule.txt Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-20 03:14:23 -06:00
sunos_execv:
sparc32: switch to generic sys_execve() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-29 12:49:48 -06:00
.globl sunos_execv
b sys_execve
clr %i2
[SPARC]: Remove SunOS and Solaris binary support. As per Documentation/feature-removal-schedule.txt Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-20 03:14:23 -06:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.align 4
[CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2 Remove __attribute__((weak)) from common code sys_pipe implemantation. IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations with the same name. Just rename them. For sys_pipe2 there is no architecture specific implementation. Cc: Richard Henderson <rth@twiddle.net> Cc: David S. Miller <davem@davemloft.net> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2009-01-14 06:13:56 -07:00
.globl sys_sparc_pipe
sys_sparc_pipe:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
mov %o7, %l5
add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
call sparc_pipe
mov %l5, %o7
.align 4
.globl sys_sigstack
sys_sigstack:
mov %o7, %l5
mov %fp, %o2
call do_sys_sigstack
mov %l5, %o7
.align 4
.globl sys_sigreturn
sys_sigreturn:
call do_sigreturn
add %sp, STACKFRAME_SZ, %o0
ld [%curptr + TI_FLAGS], %l5
andcc %l5, _TIF_SYSCALL_TRACE, %g0
be 1f
nop
call syscall_trace
sparc32: Fix exit flag passed from traced sys_sigreturn Pass 1 in %o1 to indicate that syscall_trace accounts exit. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> CC: David Miller <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-25 15:17:15 -06:00
mov 1, %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
1:
/* We don't want to muck with user registers like a
* normal syscall, just return.
*/
RESTORE_ALL
.align 4
.globl sys_rt_sigreturn
sys_rt_sigreturn:
call do_rt_sigreturn
add %sp, STACKFRAME_SZ, %o0
ld [%curptr + TI_FLAGS], %l5
andcc %l5, _TIF_SYSCALL_TRACE, %g0
be 1f
nop
sparc: Use tracehook routines in syscall_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-27 04:13:13 -06:00
add %sp, STACKFRAME_SZ, %o0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
call syscall_trace
sparc: Use tracehook routines in syscall_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-27 04:13:13 -06:00
mov 1, %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
1:
/* We are returning to a signal handler. */
RESTORE_ALL
/* Now that we have a real sys_clone, sys_fork() is
* implemented in terms of it. Our _real_ implementation
* of SunOS vfork() will use sys_vfork().
*
* XXX These three should be consolidated into mostly shared
* XXX code just like on sparc64... -DaveM
*/
.align 4
.globl sys_fork, flush_patch_two
sys_fork:
mov %o7, %l5
flush_patch_two:
FLUSH_ALL_KERNEL_WINDOWS;
ld [%curptr + TI_TASK], %o4
rd %psr, %g4
WRITE_PAUSE
mov SIGCHLD, %o0 ! arg0: clone flags
rd %wim, %g5
WRITE_PAUSE
mov %fp, %o1 ! arg1: usp
std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr]
add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr
mov 0, %o3
call sparc_do_fork
mov %l5, %o7
/* Whee, kernel threads! */
.globl sys_clone, flush_patch_three
sys_clone:
mov %o7, %l5
flush_patch_three:
FLUSH_ALL_KERNEL_WINDOWS;
ld [%curptr + TI_TASK], %o4
rd %psr, %g4
WRITE_PAUSE
/* arg0,1: flags,usp -- loaded already */
cmp %o1, 0x0 ! Is new_usp NULL?
rd %wim, %g5
WRITE_PAUSE
be,a 1f
mov %fp, %o1 ! yes, use callers usp
andn %o1, 7, %o1 ! no, align to 8 bytes
1:
std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr]
add %sp, STACKFRAME_SZ, %o2 ! arg2: pt_regs ptr
mov 0, %o3
call sparc_do_fork
mov %l5, %o7
/* Whee, real vfork! */
.globl sys_vfork, flush_patch_four
sys_vfork:
flush_patch_four:
FLUSH_ALL_KERNEL_WINDOWS;
ld [%curptr + TI_TASK], %o4
rd %psr, %g4
WRITE_PAUSE
rd %wim, %g5
WRITE_PAUSE
std %g4, [%o4 + AOFF_task_thread + AOFF_thread_fork_kpsr]
sethi %hi(0x4000 | 0x0100 | SIGCHLD), %o0
mov %fp, %o1
or %o0, %lo(0x4000 | 0x0100 | SIGCHLD), %o0
sethi %hi(sparc_do_fork), %l1
mov 0, %o3
jmpl %l1 + %lo(sparc_do_fork), %g0
add %sp, STACKFRAME_SZ, %o2
.align 4
linux_sparc_ni_syscall:
sethi %hi(sys_ni_syscall), %l7
sparc32: bury the remnants of LOWSYS tricks Time to end that depravity, let's bury the body. It's been 15 years, for crying out loud... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-27 06:51:20 -06:00
b do_syscall
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
or %l7, %lo(sys_ni_syscall), %l7
linux_syscall_trace:
sparc: Use tracehook routines in syscall_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-27 04:13:13 -06:00
add %sp, STACKFRAME_SZ, %o0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
call syscall_trace
sparc: Use tracehook routines in syscall_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-27 04:13:13 -06:00
mov 0, %o1
cmp %o0, 0
bne 3f
mov -ENOSYS, %o0
sparc: Fix system call tracing register handling. A system call trace trigger on entry allows the tracing process to inspect and potentially change the traced process's registers. Account for that by reloading the %g1 (syscall number) and %i0-%i5 (syscall argument) values. We need to be careful to revalidate the range of %g1, and reload the system call table entry it corresponds to into %l7. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Mike Frysinger <vapier@gentoo.org>
2016-01-18 04:32:30 -07:00
/* Syscall tracing can modify the registers. */
ld [%sp + STACKFRAME_SZ + PT_G1], %g1
sethi %hi(sys_call_table), %l7
ld [%sp + STACKFRAME_SZ + PT_I0], %i0
or %l7, %lo(sys_call_table), %l7
ld [%sp + STACKFRAME_SZ + PT_I1], %i1
ld [%sp + STACKFRAME_SZ + PT_I2], %i2
ld [%sp + STACKFRAME_SZ + PT_I3], %i3
ld [%sp + STACKFRAME_SZ + PT_I4], %i4
ld [%sp + STACKFRAME_SZ + PT_I5], %i5
cmp %g1, NR_syscalls
bgeu 3f
mov -ENOSYS, %o0
sll %g1, 2, %l4
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
mov %i0, %o0
sparc: Fix system call tracing register handling. A system call trace trigger on entry allows the tracing process to inspect and potentially change the traced process's registers. Account for that by reloading the %g1 (syscall number) and %i0-%i5 (syscall argument) values. We need to be careful to revalidate the range of %g1, and reload the system call table entry it corresponds to into %l7. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Mike Frysinger <vapier@gentoo.org>
2016-01-18 04:32:30 -07:00
ld [%l7 + %l4], %l7
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
mov %i1, %o1
mov %i2, %o2
mov %i3, %o3
b 2f
mov %i4, %o4
.globl ret_from_fork
ret_from_fork:
call schedule_tail
sparc32: Pass task_struct to schedule_tail() in ret_from_fork We have to pass task_struct of previous process to function schedule_tail(). Currently in ret_from_fork previous thread_info is passed: switch_to: mov %g6, %g3 /* previous thread_info in g6 */ ret_from_fork: call schedule_tail mov %g3, %o0 /* previous thread_info is passed */ void schedule_tail(struct task_struct *prev); Signed-off-by: Tkhai Kirill <tkhai@yandex.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-31 01:52:38 -06:00
ld [%g3 + TI_TASK], %o0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
b ret_sys_call
ld [%sp + STACKFRAME_SZ + PT_I0], %o0
sparc32: switch to generic kernel_thread() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-27 13:21:21 -06:00
.globl ret_from_kernel_thread
ret_from_kernel_thread:
call schedule_tail
ld [%g3 + TI_TASK], %o0
ld [%sp + STACKFRAME_SZ + PT_G1], %l0
call %l0
ld [%sp + STACKFRAME_SZ + PT_G2], %o0
sparc32: switch to generic kernel_execve() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-28 12:20:01 -06:00
rd %psr, %l1
ld [%sp + STACKFRAME_SZ + PT_PSR], %l0
andn %l0, PSR_CWP, %l0
nop
and %l1, PSR_CWP, %l1
or %l0, %l1, %l0
st %l0, [%sp + STACKFRAME_SZ + PT_PSR]
b ret_sys_call
mov 0, %o0
sparc32: switch to generic kernel_thread() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-27 13:21:21 -06:00
[SPARC]: Remove SunOS and Solaris binary support. As per Documentation/feature-removal-schedule.txt Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-20 03:14:23 -06:00
/* Linux native system calls enter here... */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.align 4
.globl linux_sparc_syscall
linux_sparc_syscall:
sparc: Fix debugger syscall restart interactions. So, forever, we've had this ptrace_signal_deliver implementation which tries to handle all of the nasties that can occur when the debugger looks at a process about to take a signal. It's meant to address all of these issues inside of the kernel so that the debugger need not be mindful of such things. Problem is, this doesn't work. The idea was that we should do the syscall restart business first, so that the debugger captures that state. Otherwise, if the debugger for example saves the child's state, makes the child execute something else, then restores the saved state, we won't handle the syscall restart properly because we lose the "we're in a syscall" state. The code here worked for most cases, but if the debugger actually passes the signal through to the child unaltered, it's possible that we would do a syscall restart when we shouldn't have. In particular this breaks the case of debugging a process under a gdb which is being debugged by yet another gdb. gdb uses sigsuspend to wait for SIGCHLD of the inferior, but if gdb itself is being debugged by a top-level gdb we get a ptrace_stop(). The top-level gdb does a PTRACE_CONT with SIGCHLD to let the inferior gdb see the signal. But ptrace_signal_deliver() assumed the debugger would cancel out the signal and therefore did a syscall restart, because the return error was ERESTARTNOHAND. Fix this by simply making ptrace_signal_deliver() a nop, and providing a way for the debugger to control system call restarting properly: 1) Report a "in syscall" software bit in regs->{tstate,psr}. It is set early on in trap entry to a system call and is fully visible to the debugger via ptrace() and regsets. 2) Test this bit right before doing a syscall restart. We have to do a final recheck right after get_signal_to_deliver() in case the debugger cleared the bit during ptrace_stop(). 3) Clear the bit in trap return so we don't accidently try to set that bit in the real register. As a result we also get a ptrace_{is,clear}_syscall() for sparc32 just like sparc64 has. M68K has this same exact bug, and is now the only other user of the ptrace_signal_deliver hook. It needs to be fixed in the same exact way as sparc. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-11 03:07:19 -06:00
sethi %hi(PSR_SYSCALL), %l4
or %l0, %l4, %l0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/* Direct access to user regs, must faster. */
sparc64: Add syscall tracepoint support. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-11 01:44:47 -07:00
cmp %g1, NR_syscalls
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
bgeu linux_sparc_ni_syscall
sll %g1, 2, %l4
ld [%l7 + %l4], %l7
sparc32: bury the remnants of LOWSYS tricks Time to end that depravity, let's bury the body. It's been 15 years, for crying out loud... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-27 06:51:20 -06:00
do_syscall:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
SAVE_ALL_HEAD
rd %wim, %l3
wr %l0, PSR_ET, %psr
mov %i0, %o0
mov %i1, %o1
mov %i2, %o2
ld [%curptr + TI_FLAGS], %l5
mov %i3, %o3
andcc %l5, _TIF_SYSCALL_TRACE, %g0
mov %i4, %o4
bne linux_syscall_trace
mov %i0, %l5
2:
call %l7
mov %i5, %o5
sparc: Use tracehook routines in syscall_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-27 04:13:13 -06:00
3:
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
st %o0, [%sp + STACKFRAME_SZ + PT_I0]
ret_sys_call:
ld [%curptr + TI_FLAGS], %l6
cmp %o0, -ERESTART_RESTARTBLOCK
ld [%sp + STACKFRAME_SZ + PT_PSR], %g3
set PSR_C, %g2
bgeu 1f
andcc %l6, _TIF_SYSCALL_TRACE, %g0
/* System call success, clear Carry condition code. */
andn %g3, %g2, %g3
clr %l6
st %g3, [%sp + STACKFRAME_SZ + PT_PSR]
bne linux_syscall_trace2
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
b ret_trap_entry
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
1:
/* System call failure, set Carry condition code.
* Also, get abs(errno) to return to the process.
*/
sub %g0, %o0, %o0
or %g3, %g2, %g3
st %o0, [%sp + STACKFRAME_SZ + PT_I0]
mov 1, %l6
st %g3, [%sp + STACKFRAME_SZ + PT_PSR]
bne linux_syscall_trace2
ld [%sp + STACKFRAME_SZ + PT_NPC], %l1 /* pc = npc */
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
b ret_trap_entry
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
linux_syscall_trace2:
sparc: Use tracehook routines in syscall_trace(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-27 04:13:13 -06:00
add %sp, STACKFRAME_SZ, %o0
mov 1, %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
call syscall_trace
add %l1, 0x4, %l2 /* npc = npc+4 */
st %l1, [%sp + STACKFRAME_SZ + PT_PC]
b ret_trap_entry
st %l2, [%sp + STACKFRAME_SZ + PT_NPC]
/* Saving and restoring the FPU state is best done from lowlevel code.
*
* void fpsave(unsigned long *fpregs, unsigned long *fsr,
* void *fpqueue, unsigned long *fpqdepth)
*/
.globl fpsave
fpsave:
st %fsr, [%o1] ! this can trap on us if fpu is in bogon state
ld [%o1], %g1
set 0x2000, %g4
andcc %g1, %g4, %g0
be 2f
mov 0, %g2
/* We have an fpqueue to save. */
1:
std %fq, [%o2]
fpsave_magic:
st %fsr, [%o1]
ld [%o1], %g3
andcc %g3, %g4, %g0
add %g2, 1, %g2
bne 1b
add %o2, 8, %o2
2:
st %g2, [%o3]
std %f0, [%o0 + 0x00]
std %f2, [%o0 + 0x08]
std %f4, [%o0 + 0x10]
std %f6, [%o0 + 0x18]
std %f8, [%o0 + 0x20]
std %f10, [%o0 + 0x28]
std %f12, [%o0 + 0x30]
std %f14, [%o0 + 0x38]
std %f16, [%o0 + 0x40]
std %f18, [%o0 + 0x48]
std %f20, [%o0 + 0x50]
std %f22, [%o0 + 0x58]
std %f24, [%o0 + 0x60]
std %f26, [%o0 + 0x68]
std %f28, [%o0 + 0x70]
retl
std %f30, [%o0 + 0x78]
/* Thanks for Theo Deraadt and the authors of the Sprite/netbsd/openbsd
* code for pointing out this possible deadlock, while we save state
* above we could trap on the fsr store so our low level fpu trap
* code has to know how to deal with this.
*/
fpsave_catch:
b fpsave_magic + 4
st %fsr, [%o1]
fpsave_catch2:
b fpsave + 4
st %fsr, [%o1]
/* void fpload(unsigned long *fpregs, unsigned long *fsr); */
.globl fpload
fpload:
ldd [%o0 + 0x00], %f0
ldd [%o0 + 0x08], %f2
ldd [%o0 + 0x10], %f4
ldd [%o0 + 0x18], %f6
ldd [%o0 + 0x20], %f8
ldd [%o0 + 0x28], %f10
ldd [%o0 + 0x30], %f12
ldd [%o0 + 0x38], %f14
ldd [%o0 + 0x40], %f16
ldd [%o0 + 0x48], %f18
ldd [%o0 + 0x50], %f20
ldd [%o0 + 0x58], %f22
ldd [%o0 + 0x60], %f24
ldd [%o0 + 0x68], %f26
ldd [%o0 + 0x70], %f28
ldd [%o0 + 0x78], %f30
ld [%o1], %fsr
retl
nop
/* __ndelay and __udelay take two arguments:
* 0 - nsecs or usecs to delay
* 1 - per_cpu udelay_val (loops per jiffy)
*
* Note that ndelay gives HZ times higher resolution but has a 10ms
* limit. udelay can handle up to 1s.
*/
.globl __ndelay
__ndelay:
save %sp, -STACKFRAME_SZ, %sp
sparc32: Kill off software 32-bit multiply/divide routines. For the explicit calls to .udiv/.umul in assembler, I made a mechanical (read as: safe) transformation. I didn't attempt to make any simplifications. In particular, __ndelay and __udelay can be simplified significantly. Some of the %y reads are unnecessary and these routines have no need any longer for allocating a register window, they can be leaf functions. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-15 12:23:01 -06:00
mov %i0, %o0 ! round multiplier up so large ns ok
mov 0x1ae, %o1 ! 2**32 / (1 000 000 000 / HZ)
umul %o0, %o1, %o0
rd %y, %o1
mov %i1, %o1 ! udelay_val
umul %o0, %o1, %o0
rd %y, %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
ba delay_continue
mov %o1, %o0 ! >>32 later for better resolution
.globl __udelay
__udelay:
save %sp, -STACKFRAME_SZ, %sp
mov %i0, %o0
[SPARC32]: Fix rounding errors in ndelay/udelay implementation. __ndelay and __udelay have not been delayung >= specified time. The problem with __ndelay has been tacked down to the rounding of the multiplier constant. By changing this, delays > app 18us are correctly calculated. The problem with __udelay has also been tracked down to rounding issues. Changing the multiplier constant (to match that used in sparc64) corrects for large delays and adding in a rounding constant corrects for trunctaion errors in the claculations. Many short delays will return without looping. This is not an error as there is the fixed delay of doing all the maths to calculate the loop count. Signed-off-by: Mark Fortescue <mark@mtfhpc.demon.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-21 20:17:41 -06:00
sethi %hi(0x10c7), %o1 ! round multiplier up so large us ok
sparc32: Kill off software 32-bit multiply/divide routines. For the explicit calls to .udiv/.umul in assembler, I made a mechanical (read as: safe) transformation. I didn't attempt to make any simplifications. In particular, __ndelay and __udelay can be simplified significantly. Some of the %y reads are unnecessary and these routines have no need any longer for allocating a register window, they can be leaf functions. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-15 12:23:01 -06:00
or %o1, %lo(0x10c7), %o1 ! 2**32 / 1 000 000
umul %o0, %o1, %o0
rd %y, %o1
mov %i1, %o1 ! udelay_val
umul %o0, %o1, %o0
rd %y, %o1
[SPARC32]: Fix rounding errors in ndelay/udelay implementation. __ndelay and __udelay have not been delayung >= specified time. The problem with __ndelay has been tacked down to the rounding of the multiplier constant. By changing this, delays > app 18us are correctly calculated. The problem with __udelay has also been tracked down to rounding issues. Changing the multiplier constant (to match that used in sparc64) corrects for large delays and adding in a rounding constant corrects for trunctaion errors in the claculations. Many short delays will return without looping. This is not an error as there is the fixed delay of doing all the maths to calculate the loop count. Signed-off-by: Mark Fortescue <mark@mtfhpc.demon.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-21 20:17:41 -06:00
sethi %hi(0x028f4b62), %l0 ! Add in rounding constant * 2**32,
or %g0, %lo(0x028f4b62), %l0
addcc %o0, %l0, %o0 ! 2**32 * 0.009 999
bcs,a 3f
add %o1, 0x01, %o1
3:
sparc32: Kill off software 32-bit multiply/divide routines. For the explicit calls to .udiv/.umul in assembler, I made a mechanical (read as: safe) transformation. I didn't attempt to make any simplifications. In particular, __ndelay and __udelay can be simplified significantly. Some of the %y reads are unnecessary and these routines have no need any longer for allocating a register window, they can be leaf functions. Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-15 12:23:01 -06:00
mov HZ, %o0 ! >>32 earlier for wider range
umul %o0, %o1, %o0
rd %y, %o1
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
delay_continue:
cmp %o0, 0x0
1:
bne 1b
subcc %o0, 1, %o0
ret
restore
/* Handle a software breakpoint */
/* We have to inform parent that child has stopped */
.align 4
.globl breakpoint_trap
breakpoint_trap:
rd %wim,%l3
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
st %i0, [%sp + STACKFRAME_SZ + PT_G0] ! for restarting syscalls
call sparc_breakpoint
add %sp, STACKFRAME_SZ, %o0
RESTORE_ALL
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
#ifdef CONFIG_KGDB
sparc32: drop hardcoding trap_level in kgdb_trap Fix this so we pass the trap_level from the actual trap code like we do in sparc64. Add use on ENTRY(), ENDPROC() in the assembler function too. This fixes a bug where the hardcoded value for trap_level was the sparc64 value. As the generic code does not use the trap_level argument (for sparc32) - this patch does not have any functional impact. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-22 11:41:03 -06:00
ENTRY(kgdb_trap_low)
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
rd %wim,%l3
SAVE_ALL
wr %l0, PSR_ET, %psr
WRITE_PAUSE
sparc32: drop hardcoding trap_level in kgdb_trap Fix this so we pass the trap_level from the actual trap code like we do in sparc64. Add use on ENTRY(), ENDPROC() in the assembler function too. This fixes a bug where the hardcoded value for trap_level was the sparc64 value. As the generic code does not use the trap_level argument (for sparc32) - this patch does not have any functional impact. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-22 11:41:03 -06:00
mov %l7, %o0 ! trap_level
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
call kgdb_trap
sparc32: drop hardcoding trap_level in kgdb_trap Fix this so we pass the trap_level from the actual trap code like we do in sparc64. Add use on ENTRY(), ENDPROC() in the assembler function too. This fixes a bug where the hardcoded value for trap_level was the sparc64 value. As the generic code does not use the trap_level argument (for sparc32) - this patch does not have any functional impact. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-22 11:41:03 -06:00
add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
RESTORE_ALL
sparc32: drop hardcoding trap_level in kgdb_trap Fix this so we pass the trap_level from the actual trap code like we do in sparc64. Add use on ENTRY(), ENDPROC() in the assembler function too. This fixes a bug where the hardcoded value for trap_level was the sparc64 value. As the generic code does not use the trap_level argument (for sparc32) - this patch does not have any functional impact. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-22 11:41:03 -06:00
ENDPROC(kgdb_trap_low)
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
.align 4
sparc/kernel/: possible cleanups This patch contains the following possible cleanups: - make the following needlessly global code static: - apc.c: apc_swift_idle() - ebus.c: ebus_blacklist_irq() - ebus.c: fill_ebus_child() - ebus.c: fill_ebus_device() - entry.S: syscall_is_too_hard - etra: tsetup_sun4c_stackchk - head.S: cputyp - head.S: prom_vector_p - idprom.c: Sun_Machines[] - ioport.c: _sparc_find_resource() - ioport.c: create_proc_read_entry() - irq.c: struct sparc_irq[] - rtrap.S: sun4c_rett_stackchk - setup.c: prom_sync_me() - setup.c: boot_flags - sun4c_irq.c: sun4c_sbint_to_irq() - sun4d_irq.c: sbus_tid[] - sun4d_irq.c: struct sbus_actions - sun4d_irq.c: sun4d_sbint_to_irq() - sun4m_irq.c: sun4m_sbint_to_irq() - sun4m_irq.c: sun4m_get_irqmask() - sun4m_irq.c: sun4m_timers - sun4m_smp.c: smp4m_cross_call() - sun4m_smp.c: smp4m_blackbox_id() - sun4m_smp.c: smp4m_blackbox_current() - time.c: sp_clock_typ - time.c: sbus_time_init() - traps.c: instruction_dump() - wof.S: spwin_sun4c_stackchk - wuf.S: sun4c_fwin_stackchk - #if 0 the following unused code: - process.c: sparc_backtrace_lock - process.c: __show_backtrace() - process.c: show_backtrace() - process.c: smp_show_backtrace_all_cpus() - remove the following unused code: - entry.S: __handle_exception - smp.c: smp_num_cpus - smp.c: smp_activated - smp.c: __cpu_number_map[] - smp.c: __cpu_logical_map[] - smp.c: bitops_spinlock - traps.c: trap_curbuf - traps.c: trapbuf[] - traps.c: linux_smp_still_initting - traps.c: thiscpus_tbr - traps.c: thiscpus_mid Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-06-05 12:40:58 -06:00
.globl flush_patch_exception
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
flush_patch_exception:
FLUSH_ALL_KERNEL_WINDOWS;
ldd [%o0], %o6
jmpl %o7 + 0xc, %g0 ! see asm-sparc/processor.h
mov 1, %g1 ! signal EFAULT condition
.align 4
.globl kill_user_windows, kuw_patch1_7win
.globl kuw_patch1
kuw_patch1_7win: sll %o3, 6, %o3
/* No matter how much overhead this routine has in the worst
sparc: Fix misspellings in comments. Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Reviewed-by: Julian Calaby <julian.calaby@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-03-04 12:21:18 -07:00
* case scenario, it is several times better than taking the
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
* traps with the old method of just doing flush_user_windows().
*/
kill_user_windows:
ld [%g6 + TI_UWINMASK], %o0 ! get current umask
orcc %g0, %o0, %g0 ! if no bits set, we are done
be 3f ! nothing to do
rd %psr, %o5 ! must clear interrupts
or %o5, PSR_PIL, %o4 ! or else that could change
wr %o4, 0x0, %psr ! the uwinmask state
WRITE_PAUSE ! burn them cycles
1:
ld [%g6 + TI_UWINMASK], %o0 ! get consistent state
orcc %g0, %o0, %g0 ! did an interrupt come in?
be 4f ! yep, we are done
rd %wim, %o3 ! get current wim
srl %o3, 1, %o4 ! simulate a save
kuw_patch1:
sll %o3, 7, %o3 ! compute next wim
or %o4, %o3, %o3 ! result
andncc %o0, %o3, %o0 ! clean this bit in umask
bne kuw_patch1 ! not done yet
srl %o3, 1, %o4 ! begin another save simulation
wr %o3, 0x0, %wim ! set the new wim
st %g0, [%g6 + TI_UWINMASK] ! clear uwinmask
4:
wr %o5, 0x0, %psr ! re-enable interrupts
WRITE_PAUSE ! burn baby burn
3:
retl ! return
st %g0, [%g6 + TI_W_SAVED] ! no windows saved
.align 4
.globl restore_current
restore_current:
LOAD_CURRENT(g6, o0)
retl
nop
sparc32: added CONFIG_PCIC_PCI Kconfig setting Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-23 15:04:46 -06:00
#ifdef CONFIG_PCIC_PCI
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
#include <asm/pcic.h>
.align 4
.globl linux_trap_ipi15_pcic
linux_trap_ipi15_pcic:
rd %wim, %l3
SAVE_ALL
/*
* First deactivate NMI
* or we cannot drop ET, cannot get window spill traps.
* The busy loop is necessary because the PIO error
* sometimes does not go away quickly and we trap again.
*/
sethi %hi(pcic_regs), %o1
ld [%o1 + %lo(pcic_regs)], %o2
! Get pending status for printouts later.
ld [%o2 + PCI_SYS_INT_PENDING], %o0
mov PCI_SYS_INT_PENDING_CLEAR_ALL, %o1
stb %o1, [%o2 + PCI_SYS_INT_PENDING_CLEAR]
1:
ld [%o2 + PCI_SYS_INT_PENDING], %o1
andcc %o1, ((PCI_SYS_INT_PENDING_PIO|PCI_SYS_INT_PENDING_PCI)>>24), %g0
bne 1b
nop
or %l0, PSR_PIL, %l4
wr %l4, 0x0, %psr
WRITE_PAUSE
wr %l4, PSR_ET, %psr
WRITE_PAUSE
call pcic_nmi
add %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs
RESTORE_ALL
.globl pcic_nmi_trap_patch
pcic_nmi_trap_patch:
sethi %hi(linux_trap_ipi15_pcic), %l3
jmpl %l3 + %lo(linux_trap_ipi15_pcic), %g0
rd %psr, %l0
.word 0
sparc32: added CONFIG_PCIC_PCI Kconfig setting Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-23 15:04:46 -06:00
#endif /* CONFIG_PCIC_PCI */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
sparc: Add kgdb support. Current limitations: 1) On SMP single stepping has some fundamental issues, shared with other sw single-step architectures such as mips and arm. 2) On 32-bit sparc we don't support SMP kgdb yet. That requires some reworking of the IPI mechanisms and infrastructure on that platform. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 03:38:50 -06:00
.globl flushw_all
flushw_all:
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
save %sp, -0x40, %sp
restore
restore
restore
restore
restore
restore
ret
restore
sparc32: Implement hard_smp_processor_id() via instruction patching. This is the last non-trivial user of btfixup. Like sparc64, use a special patch section to resolve the various implementations of how to read the current CPU's ID when we don't have current_thread_info()->cpu necessarily available. Signed-off-by: David S. Miller <davem@davemloft.net> Tested-by: Sam Ravnborg <sam@ravnborg.org>
2012-05-14 00:09:04 -06:00
#ifdef CONFIG_SMP
ENTRY(hard_smp_processor_id)
661: rd %tbr, %g1
srl %g1, 12, %o0
and %o0, 3, %o0
.section .cpuid_patch, "ax"
/* Instruction location. */
.word 661b
/* SUN4D implementation. */
lda [%g0] ASI_M_VIKING_TMP1, %o0
nop
nop
/* LEON implementation. */
rd %asr17, %o0
srl %o0, 0x1c, %o0
nop
.previous
retl
nop
ENDPROC(hard_smp_processor_id)
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 16:20:36 -06:00
/* End of entry.S */
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