eb546195a7
Use sigp order code defines in assembly code as well. With this change all places that use sigp constants should have been converted to use self describing defines instead of directly using constants. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
115 lines
2.6 KiB
ArmAsm
115 lines
2.6 KiB
ArmAsm
/*
|
|
* S390 kdump lowlevel functions (new kernel)
|
|
*
|
|
* Copyright IBM Corp. 2011
|
|
* Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#include <asm/sigp.h>
|
|
|
|
#define DATAMOVER_ADDR 0x4000
|
|
#define COPY_PAGE_ADDR 0x6000
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
|
|
#
|
|
# kdump entry (new kernel - not yet relocated)
|
|
#
|
|
# Note: This code has to be position independent
|
|
#
|
|
|
|
.align 2
|
|
.Lep_startup_kdump:
|
|
lhi %r1,2 # mode 2 = esame (dump)
|
|
sigp %r1,%r0,SIGP_SET_ARCHITECTURE # Switch to esame mode
|
|
sam64 # Switch to 64 bit addressing
|
|
basr %r13,0
|
|
.Lbase:
|
|
larl %r2,.Lbase_addr # Check, if we have been
|
|
lg %r2,0(%r2) # already relocated:
|
|
clgr %r2,%r13 #
|
|
jne .Lrelocate # No : Start data mover
|
|
lghi %r2,0 # Yes: Start kdump kernel
|
|
brasl %r14,startup_kdump_relocated
|
|
|
|
.Lrelocate:
|
|
larl %r4,startup
|
|
lg %r2,0x418(%r4) # Get kdump base
|
|
lg %r3,0x420(%r4) # Get kdump size
|
|
|
|
larl %r10,.Lcopy_start # Source of data mover
|
|
lghi %r8,DATAMOVER_ADDR # Target of data mover
|
|
mvc 0(256,%r8),0(%r10) # Copy data mover code
|
|
|
|
agr %r8,%r2 # Copy data mover to
|
|
mvc 0(256,%r8),0(%r10) # reserved mem
|
|
|
|
lghi %r14,DATAMOVER_ADDR # Jump to copied data mover
|
|
basr %r14,%r14
|
|
.Lbase_addr:
|
|
.quad .Lbase
|
|
|
|
#
|
|
# kdump data mover code (runs at address DATAMOVER_ADDR)
|
|
#
|
|
# r2: kdump base address
|
|
# r3: kdump size
|
|
#
|
|
.Lcopy_start:
|
|
basr %r13,0 # Base
|
|
0:
|
|
lgr %r11,%r2 # Save kdump base address
|
|
lgr %r12,%r2
|
|
agr %r12,%r3 # Compute kdump end address
|
|
|
|
lghi %r5,0
|
|
lghi %r10,COPY_PAGE_ADDR # Load copy page address
|
|
1:
|
|
mvc 0(256,%r10),0(%r5) # Copy old kernel to tmp
|
|
mvc 0(256,%r5),0(%r11) # Copy new kernel to old
|
|
mvc 0(256,%r11),0(%r10) # Copy tmp to new
|
|
aghi %r11,256
|
|
aghi %r5,256
|
|
clgr %r11,%r12
|
|
jl 1b
|
|
|
|
lg %r14,.Lstartup_kdump-0b(%r13)
|
|
basr %r14,%r14 # Start relocated kernel
|
|
.Lstartup_kdump:
|
|
.long 0x00000000,0x00000000 + startup_kdump_relocated
|
|
.Lcopy_end:
|
|
|
|
#
|
|
# Startup of kdump (relocated new kernel)
|
|
#
|
|
.align 2
|
|
startup_kdump_relocated:
|
|
basr %r13,0
|
|
0:
|
|
mvc 0(8,%r0),.Lrestart_psw-0b(%r13) # Setup restart PSW
|
|
sam31 # Switch to 31 bit addr mode
|
|
sr %r1,%r1 # Erase register r1
|
|
sr %r2,%r2 # Erase register r2
|
|
sigp %r1,%r2,SIGP_SET_ARCHITECTURE # Switch to 31 bit arch mode
|
|
lpsw 0 # Start new kernel...
|
|
.align 8
|
|
.Lrestart_psw:
|
|
.long 0x00080000,0x80000000 + startup
|
|
#else
|
|
.align 2
|
|
.Lep_startup_kdump:
|
|
#ifdef CONFIG_64BIT
|
|
larl %r13,startup_kdump_crash
|
|
lpswe 0(%r13)
|
|
.align 8
|
|
startup_kdump_crash:
|
|
.quad 0x0002000080000000,0x0000000000000000 + startup_kdump_crash
|
|
#else
|
|
basr %r13,0
|
|
0: lpsw startup_kdump_crash-0b(%r13)
|
|
.align 8
|
|
startup_kdump_crash:
|
|
.long 0x000a0000,0x00000000 + startup_kdump_crash
|
|
#endif /* CONFIG_64BIT */
|
|
#endif /* CONFIG_CRASH_DUMP */
|