diff options
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 69489bd3210c..b4bcf5a930fa 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -97,12 +97,6 @@ __secondary_hold_spinloop: __secondary_hold_acknowledge: .llong 0x0 - /* This flag is set by purgatory if we should be a kdump kernel. */ - /* Do not move this variable as purgatory knows about it. */ - .globl __kdump_flag -__kdump_flag: - .llong 0x0 - #ifdef CONFIG_PPC_ISERIES /* * At offset 0x20, there is a pointer to iSeries LPAR data. @@ -112,6 +106,20 @@ __kdump_flag: .llong hvReleaseData-KERNELBASE #endif /* CONFIG_PPC_ISERIES */ +#ifdef CONFIG_CRASH_DUMP + /* This flag is set to 1 by a loader if the kernel should run + * at the loaded address instead of the linked address. This + * is used by kexec-tools to keep the the kdump kernel in the + * crash_kernel region. The loader is responsible for + * observing the alignment requirement. + */ + /* Do not move this variable as kexec-tools knows about it. */ + . = 0x5c + .globl __run_at_load +__run_at_load: + .long 0x72756e30 /* "run0" -- relocate to 0 by default */ +#endif + . = 0x60 /* * The following code is used to hold secondary processors @@ -1391,8 +1399,8 @@ _STATIC(__after_prom_start) lis r25,PAGE_OFFSET@highest /* compute virtual base of kernel */ sldi r25,r25,32 #ifdef CONFIG_CRASH_DUMP - ld r7,__kdump_flag-_stext(r26) - cmpldi cr0,r7,1 /* kdump kernel ? - stay where we are */ + lwz r7,__run_at_load-_stext(r26) + cmplwi cr0,r7,1 /* kdump kernel ? - stay where we are */ bne 1f add r25,r25,r26 #endif @@ -1416,11 +1424,11 @@ _STATIC(__after_prom_start) #ifdef CONFIG_CRASH_DUMP /* * Check if the kernel has to be running as relocatable kernel based on the - * variable __kdump_flag, if it is set the kernel is treated as relocatable + * variable __run_at_load, if it is set the kernel is treated as relocatable * kernel, otherwise it will be moved to PHYSICAL_START */ - ld r7,__kdump_flag-_stext(r26) - cmpldi cr0,r7,1 + lwz r7,__run_at_load-_stext(r26) + cmplwi cr0,r7,1 bne 3f li r5,__end_interrupts - _stext /* just copy interrupts */ |