![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
478 lines
14 KiB
C
478 lines
14 KiB
C
/* sun4m_irq.c
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* arch/sparc/kernel/sun4m_irq.c:
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*
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* djhr: Hacked out of irq.c into a CPU dependent version.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
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* Copyright (C) 1995 Pete A. Zaitcev (zaitcev@yahoo.com)
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* Copyright (C) 1996 Dave Redman (djhr@tadpole.co.uk)
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*/
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#include <linux/errno.h>
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#include <linux/linkage.h>
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#include <linux/kernel_stat.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/ptrace.h>
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#include <linux/smp.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <asm/ptrace.h>
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#include <asm/processor.h>
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#include <asm/system.h>
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#include <asm/psr.h>
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#include <asm/vaddrs.h>
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#include <asm/timer.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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#include <asm/traps.h>
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#include <asm/pgalloc.h>
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#include <asm/pgtable.h>
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#include <asm/smp.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/cacheflush.h>
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#include "irq.h"
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struct sun4m_irq_percpu {
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u32 pending;
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u32 clear;
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u32 set;
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};
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struct sun4m_irq_global {
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u32 pending;
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u32 mask;
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u32 mask_clear;
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u32 mask_set;
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u32 interrupt_target;
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};
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/* Code in entry.S needs to get at these register mappings. */
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struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
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struct sun4m_irq_global __iomem *sun4m_irq_global;
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/* Dave Redman (djhr@tadpole.co.uk)
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* The sun4m interrupt registers.
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*/
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#define SUN4M_INT_ENABLE 0x80000000
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#define SUN4M_INT_E14 0x00000080
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#define SUN4M_INT_E10 0x00080000
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#define SUN4M_HARD_INT(x) (0x000000001 << (x))
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#define SUN4M_SOFT_INT(x) (0x000010000 << (x))
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#define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
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#define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
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#define SUN4M_INT_M2S_WRITE_ERR 0x20000000 /* write buffer error */
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#define SUN4M_INT_ECC_ERR 0x10000000 /* ecc memory error */
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#define SUN4M_INT_VME_ERR 0x08000000 /* vme async error */
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#define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
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#define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
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#define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
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#define SUN4M_INT_REALTIME 0x00080000 /* system timer */
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#define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
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#define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
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#define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
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#define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
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#define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
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#define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
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#define SUN4M_INT_VMEBITS 0x0000007F /* vme int bits */
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#define SUN4M_INT_ERROR (SUN4M_INT_MODULE_ERR | \
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SUN4M_INT_M2S_WRITE_ERR | \
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SUN4M_INT_ECC_ERR | \
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SUN4M_INT_VME_ERR)
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#define SUN4M_INT_SBUS(x) (1 << (x+7))
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#define SUN4M_INT_VME(x) (1 << (x))
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/* Interrupt levels used by OBP */
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#define OBP_INT_LEVEL_SOFT 0x10
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#define OBP_INT_LEVEL_ONBOARD 0x20
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#define OBP_INT_LEVEL_SBUS 0x30
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#define OBP_INT_LEVEL_VME 0x40
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/* Interrupt level assignment on sun4m:
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*
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* level source
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* ------------------------------------------------------------
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* 1 softint-1
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* 2 softint-2, VME/SBUS level 1
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* 3 softint-3, VME/SBUS level 2
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* 4 softint-4, onboard SCSI
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* 5 softint-5, VME/SBUS level 3
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* 6 softint-6, onboard ETHERNET
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* 7 softint-7, VME/SBUS level 4
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* 8 softint-8, onboard VIDEO
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* 9 softint-9, VME/SBUS level 5, Module Interrupt
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* 10 softint-10, system counter/timer
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* 11 softint-11, VME/SBUS level 6, Floppy
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* 12 softint-12, Keyboard/Mouse, Serial
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* 13 softint-13, VME/SBUS level 7, ISDN Audio
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* 14 softint-14, per-processor counter/timer
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* 15 softint-15, Asynchronous Errors (broadcast)
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*
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* Each interrupt source is masked distinctly in the sun4m interrupt
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* registers. The PIL level alone is therefore ambiguous, since multiple
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* interrupt sources map to a single PIL.
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*
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* This ambiguity is resolved in the 'intr' property for device nodes
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* in the OF device tree. Each 'intr' property entry is composed of
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* two 32-bit words. The first word is the IRQ priority value, which
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* is what we're intersted in. The second word is the IRQ vector, which
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* is unused.
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*
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* The low 4 bits of the IRQ priority indicate the PIL, and the upper
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* 4 bits indicate onboard vs. SBUS leveled vs. VME leveled. 0x20
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* means onboard, 0x30 means SBUS leveled, and 0x40 means VME leveled.
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*
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* For example, an 'intr' IRQ priority value of 0x24 is onboard SCSI
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* whereas a value of 0x33 is SBUS level 2. Here are some sample
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* 'intr' property IRQ priority values from ss4, ss5, ss10, ss20, and
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* Tadpole S3 GX systems.
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*
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* esp: 0x24 onboard ESP SCSI
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* le: 0x26 onboard Lance ETHERNET
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* p9100: 0x32 SBUS level 1 P9100 video
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* bpp: 0x33 SBUS level 2 BPP parallel port device
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* DBRI: 0x39 SBUS level 5 DBRI ISDN audio
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* SUNW,leo: 0x39 SBUS level 5 LEO video
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* pcmcia: 0x3b SBUS level 6 PCMCIA controller
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* uctrl: 0x3b SBUS level 6 UCTRL device
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* modem: 0x3d SBUS level 7 MODEM
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* zs: 0x2c onboard keyboard/mouse/serial
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* floppy: 0x2b onboard Floppy
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* power: 0x22 onboard power device (XXX unknown mask bit XXX)
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*/
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static unsigned long irq_mask[0x50] = {
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/* SMP */
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0, SUN4M_SOFT_INT(1),
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SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
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SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
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SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
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SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
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SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
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SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
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SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
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/* soft */
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0, SUN4M_SOFT_INT(1),
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SUN4M_SOFT_INT(2), SUN4M_SOFT_INT(3),
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SUN4M_SOFT_INT(4), SUN4M_SOFT_INT(5),
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SUN4M_SOFT_INT(6), SUN4M_SOFT_INT(7),
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SUN4M_SOFT_INT(8), SUN4M_SOFT_INT(9),
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SUN4M_SOFT_INT(10), SUN4M_SOFT_INT(11),
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SUN4M_SOFT_INT(12), SUN4M_SOFT_INT(13),
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SUN4M_SOFT_INT(14), SUN4M_SOFT_INT(15),
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/* onboard */
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0, 0, 0, 0,
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SUN4M_INT_SCSI, 0, SUN4M_INT_ETHERNET, 0,
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SUN4M_INT_VIDEO, SUN4M_INT_MODULE,
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SUN4M_INT_REALTIME, SUN4M_INT_FLOPPY,
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(SUN4M_INT_SERIAL | SUN4M_INT_KBDMS),
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SUN4M_INT_AUDIO, 0, SUN4M_INT_MODULE_ERR,
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/* sbus */
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0, 0, SUN4M_INT_SBUS(0), SUN4M_INT_SBUS(1),
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0, SUN4M_INT_SBUS(2), 0, SUN4M_INT_SBUS(3),
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0, SUN4M_INT_SBUS(4), 0, SUN4M_INT_SBUS(5),
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0, SUN4M_INT_SBUS(6), 0, 0,
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/* vme */
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0, 0, SUN4M_INT_VME(0), SUN4M_INT_VME(1),
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0, SUN4M_INT_VME(2), 0, SUN4M_INT_VME(3),
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0, SUN4M_INT_VME(4), 0, SUN4M_INT_VME(5),
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0, SUN4M_INT_VME(6), 0, 0
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};
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static unsigned long sun4m_get_irqmask(unsigned int irq)
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{
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unsigned long mask;
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if (irq < 0x50)
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mask = irq_mask[irq];
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else
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mask = 0;
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if (!mask)
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printk(KERN_ERR "sun4m_get_irqmask: IRQ%d has no valid mask!\n",
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irq);
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return mask;
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}
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static void sun4m_disable_irq(unsigned int irq_nr)
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{
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unsigned long mask, flags;
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int cpu = smp_processor_id();
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mask = sun4m_get_irqmask(irq_nr);
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local_irq_save(flags);
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if (irq_nr > 15)
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sbus_writel(mask, &sun4m_irq_global->mask_set);
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else
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sbus_writel(mask, &sun4m_irq_percpu[cpu]->set);
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local_irq_restore(flags);
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}
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static void sun4m_enable_irq(unsigned int irq_nr)
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{
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unsigned long mask, flags;
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int cpu = smp_processor_id();
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/* Dreadful floppy hack. When we use 0x2b instead of
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* 0x0b the system blows (it starts to whistle!).
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* So we continue to use 0x0b. Fixme ASAP. --P3
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*/
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if (irq_nr != 0x0b) {
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mask = sun4m_get_irqmask(irq_nr);
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local_irq_save(flags);
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if (irq_nr > 15)
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sbus_writel(mask, &sun4m_irq_global->mask_clear);
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else
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sbus_writel(mask, &sun4m_irq_percpu[cpu]->clear);
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local_irq_restore(flags);
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} else {
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local_irq_save(flags);
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sbus_writel(SUN4M_INT_FLOPPY, &sun4m_irq_global->mask_clear);
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local_irq_restore(flags);
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}
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}
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static unsigned long cpu_pil_to_imask[16] = {
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/*0*/ 0x00000000,
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/*1*/ 0x00000000,
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/*2*/ SUN4M_INT_SBUS(0) | SUN4M_INT_VME(0),
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/*3*/ SUN4M_INT_SBUS(1) | SUN4M_INT_VME(1),
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/*4*/ SUN4M_INT_SCSI,
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/*5*/ SUN4M_INT_SBUS(2) | SUN4M_INT_VME(2),
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/*6*/ SUN4M_INT_ETHERNET,
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/*7*/ SUN4M_INT_SBUS(3) | SUN4M_INT_VME(3),
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/*8*/ SUN4M_INT_VIDEO,
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/*9*/ SUN4M_INT_SBUS(4) | SUN4M_INT_VME(4) | SUN4M_INT_MODULE_ERR,
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/*10*/ SUN4M_INT_REALTIME,
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/*11*/ SUN4M_INT_SBUS(5) | SUN4M_INT_VME(5) | SUN4M_INT_FLOPPY,
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/*12*/ SUN4M_INT_SERIAL | SUN4M_INT_KBDMS,
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/*13*/ SUN4M_INT_SBUS(6) | SUN4M_INT_VME(6) | SUN4M_INT_AUDIO,
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/*14*/ SUN4M_INT_E14,
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/*15*/ SUN4M_INT_ERROR
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};
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/* We assume the caller has disabled local interrupts when these are called,
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* or else very bizarre behavior will result.
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*/
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static void sun4m_disable_pil_irq(unsigned int pil)
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{
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sbus_writel(cpu_pil_to_imask[pil], &sun4m_irq_global->mask_set);
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}
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static void sun4m_enable_pil_irq(unsigned int pil)
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{
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sbus_writel(cpu_pil_to_imask[pil], &sun4m_irq_global->mask_clear);
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}
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#ifdef CONFIG_SMP
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static void sun4m_send_ipi(int cpu, int level)
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{
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unsigned long mask = sun4m_get_irqmask(level);
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sbus_writel(mask, &sun4m_irq_percpu[cpu]->set);
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}
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static void sun4m_clear_ipi(int cpu, int level)
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{
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unsigned long mask = sun4m_get_irqmask(level);
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sbus_writel(mask, &sun4m_irq_percpu[cpu]->clear);
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}
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static void sun4m_set_udt(int cpu)
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{
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sbus_writel(cpu, &sun4m_irq_global->interrupt_target);
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}
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#endif
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struct sun4m_timer_percpu {
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u32 l14_limit;
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u32 l14_count;
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u32 l14_limit_noclear;
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u32 user_timer_start_stop;
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};
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static struct sun4m_timer_percpu __iomem *timers_percpu[SUN4M_NCPUS];
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struct sun4m_timer_global {
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u32 l10_limit;
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u32 l10_count;
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u32 l10_limit_noclear;
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u32 reserved;
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u32 timer_config;
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};
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static struct sun4m_timer_global __iomem *timers_global;
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#define TIMER_IRQ (OBP_INT_LEVEL_ONBOARD | 10)
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unsigned int lvl14_resolution = (((1000000/HZ) + 1) << 10);
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static void sun4m_clear_clock_irq(void)
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{
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sbus_readl(&timers_global->l10_limit);
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}
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void sun4m_nmi(struct pt_regs *regs)
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{
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unsigned long afsr, afar, si;
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printk(KERN_ERR "Aieee: sun4m NMI received!\n");
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/* XXX HyperSparc hack XXX */
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__asm__ __volatile__("mov 0x500, %%g1\n\t"
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"lda [%%g1] 0x4, %0\n\t"
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"mov 0x600, %%g1\n\t"
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"lda [%%g1] 0x4, %1\n\t" :
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"=r" (afsr), "=r" (afar));
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printk(KERN_ERR "afsr=%08lx afar=%08lx\n", afsr, afar);
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si = sbus_readl(&sun4m_irq_global->pending);
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printk(KERN_ERR "si=%08lx\n", si);
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if (si & SUN4M_INT_MODULE_ERR)
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printk(KERN_ERR "Module async error\n");
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if (si & SUN4M_INT_M2S_WRITE_ERR)
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printk(KERN_ERR "MBus/SBus async error\n");
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if (si & SUN4M_INT_ECC_ERR)
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printk(KERN_ERR "ECC memory error\n");
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if (si & SUN4M_INT_VME_ERR)
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printk(KERN_ERR "VME async error\n");
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printk(KERN_ERR "you lose buddy boy...\n");
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show_regs(regs);
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prom_halt();
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}
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/* Exported for sun4m_smp.c */
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void sun4m_clear_profile_irq(int cpu)
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{
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sbus_readl(&timers_percpu[cpu]->l14_limit);
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}
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static void sun4m_load_profile_irq(int cpu, unsigned int limit)
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{
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sbus_writel(limit, &timers_percpu[cpu]->l14_limit);
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}
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static void __init sun4m_init_timers(irq_handler_t counter_fn)
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{
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struct device_node *dp = of_find_node_by_name(NULL, "counter");
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int i, err, len, num_cpu_timers;
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const u32 *addr;
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if (!dp) {
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printk(KERN_ERR "sun4m_init_timers: No 'counter' node.\n");
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return;
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}
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addr = of_get_property(dp, "address", &len);
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of_node_put(dp);
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if (!addr) {
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printk(KERN_ERR "sun4m_init_timers: No 'address' prop.\n");
|
|
return;
|
|
}
|
|
|
|
num_cpu_timers = (len / sizeof(u32)) - 1;
|
|
for (i = 0; i < num_cpu_timers; i++) {
|
|
timers_percpu[i] = (void __iomem *)
|
|
(unsigned long) addr[i];
|
|
}
|
|
timers_global = (void __iomem *)
|
|
(unsigned long) addr[num_cpu_timers];
|
|
|
|
sbus_writel((((1000000/HZ) + 1) << 10), &timers_global->l10_limit);
|
|
|
|
master_l10_counter = &timers_global->l10_count;
|
|
|
|
err = request_irq(TIMER_IRQ, counter_fn,
|
|
(IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
|
|
if (err) {
|
|
printk(KERN_ERR "sun4m_init_timers: Register IRQ error %d.\n",
|
|
err);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < num_cpu_timers; i++)
|
|
sbus_writel(0, &timers_percpu[i]->l14_limit);
|
|
if (num_cpu_timers == 4)
|
|
sbus_writel(SUN4M_INT_E14, &sun4m_irq_global->mask_set);
|
|
|
|
#ifdef CONFIG_SMP
|
|
{
|
|
unsigned long flags;
|
|
extern unsigned long lvl14_save[4];
|
|
struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (14 - 1)];
|
|
|
|
/* For SMP we use the level 14 ticker, however the bootup code
|
|
* has copied the firmware's level 14 vector into the boot cpu's
|
|
* trap table, we must fix this now or we get squashed.
|
|
*/
|
|
local_irq_save(flags);
|
|
trap_table->inst_one = lvl14_save[0];
|
|
trap_table->inst_two = lvl14_save[1];
|
|
trap_table->inst_three = lvl14_save[2];
|
|
trap_table->inst_four = lvl14_save[3];
|
|
local_flush_cache_all();
|
|
local_irq_restore(flags);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void __init sun4m_init_IRQ(void)
|
|
{
|
|
struct device_node *dp = of_find_node_by_name(NULL, "interrupt");
|
|
int len, i, mid, num_cpu_iregs;
|
|
const u32 *addr;
|
|
|
|
if (!dp) {
|
|
printk(KERN_ERR "sun4m_init_IRQ: No 'interrupt' node.\n");
|
|
return;
|
|
}
|
|
|
|
addr = of_get_property(dp, "address", &len);
|
|
of_node_put(dp);
|
|
if (!addr) {
|
|
printk(KERN_ERR "sun4m_init_IRQ: No 'address' prop.\n");
|
|
return;
|
|
}
|
|
|
|
num_cpu_iregs = (len / sizeof(u32)) - 1;
|
|
for (i = 0; i < num_cpu_iregs; i++) {
|
|
sun4m_irq_percpu[i] = (void __iomem *)
|
|
(unsigned long) addr[i];
|
|
}
|
|
sun4m_irq_global = (void __iomem *)
|
|
(unsigned long) addr[num_cpu_iregs];
|
|
|
|
local_irq_disable();
|
|
|
|
sbus_writel(~SUN4M_INT_MASKALL, &sun4m_irq_global->mask_set);
|
|
for (i = 0; !cpu_find_by_instance(i, NULL, &mid); i++)
|
|
sbus_writel(~0x17fff, &sun4m_irq_percpu[mid]->clear);
|
|
|
|
if (num_cpu_iregs == 4)
|
|
sbus_writel(0, &sun4m_irq_global->interrupt_target);
|
|
|
|
BTFIXUPSET_CALL(enable_irq, sun4m_enable_irq, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(disable_irq, sun4m_disable_irq, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(enable_pil_irq, sun4m_enable_pil_irq, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(disable_pil_irq, sun4m_disable_pil_irq, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(clear_clock_irq, sun4m_clear_clock_irq, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(load_profile_irq, sun4m_load_profile_irq, BTFIXUPCALL_NORM);
|
|
sparc_init_timers = sun4m_init_timers;
|
|
#ifdef CONFIG_SMP
|
|
BTFIXUPSET_CALL(set_cpu_int, sun4m_send_ipi, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(clear_cpu_int, sun4m_clear_ipi, BTFIXUPCALL_NORM);
|
|
BTFIXUPSET_CALL(set_irq_udt, sun4m_set_udt, BTFIXUPCALL_NORM);
|
|
#endif
|
|
|
|
/* Cannot enable interrupts until OBP ticker is disabled. */
|
|
}
|