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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-23 08:28:25 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-23 08:28:25 -0700 |
commit | 9bf9b2f3ad6362cdc9ef79291d440a92960b8f51 (patch) | |
tree | c50a317a619096a6ec84c243fafef50388004df6 /arch/powerpc/kernel/head_64.S | |
parent | 9779a8325a9bbf4ccd3853e0e4064984cf9da9c9 (diff) | |
parent | 54622f10a6aabb8bb2bdacf3dd070046f03dc246 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (53 commits)
powerpc: Support for relocatable kdump kernel
powerpc: Don't use a 16G page if beyond mem= limits
powerpc: Add del_node() for early boot code to prune inapplicable devices.
powerpc: Further compile fixup for STRICT_MM_TYPECHECKS
powerpc: Remove empty #else from signal_64.c
powerpc: Move memory size print into common show_cpuinfo for 32-bit
hvc_console: Remove __devexit annotation of hvc_remove()
hvc_console: Add support for tty window resizing
hvc_console: Fix loop if put_char() returns 0
hvc_console: Add tty driver flag TTY_DRIVER_RESET_TERMIOS
hvc_console: Add a hangup notifier for backends
powerpc/83xx: Add DS1339 RTC support for MPC8349E-mITX boards .dts
powerpc/83xx: Add support for MCU microcontroller in .dts files
powerpc/85xx: Move mpc8572ds.dts to address-cells/size-cells = <2>
of/spi: Support specifying chip select as active high via device tree
powerpc: Remove device_type = "board_control" properties in .dts files
i2c-cpm: Suppress autoprobing for devices
powerpc/85xx: Fix mpc8536ds dma interrupt numbers
powerpc/85xx: Enable enhanced functions for 8536 TSEC
powerpc: Delete unused prom_strtoul and prom_memparse
...
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
-rw-r--r-- | arch/powerpc/kernel/head_64.S | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 84856bee33a..69489bd3210 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -97,6 +97,12 @@ __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. @@ -1384,7 +1390,13 @@ _STATIC(__after_prom_start) /* process relocations for the final address of the kernel */ lis r25,PAGE_OFFSET@highest /* compute virtual base of kernel */ sldi r25,r25,32 - mr r3,r25 +#ifdef CONFIG_CRASH_DUMP + ld r7,__kdump_flag-_stext(r26) + cmpldi cr0,r7,1 /* kdump kernel ? - stay where we are */ + bne 1f + add r25,r25,r26 +#endif +1: mr r3,r25 bl .relocate #endif @@ -1398,11 +1410,26 @@ _STATIC(__after_prom_start) li r3,0 /* target addr */ mr. r4,r26 /* In some cases the loader may */ beq 9f /* have already put us at zero */ - lis r5,(copy_to_here - _stext)@ha - addi r5,r5,(copy_to_here - _stext)@l /* # bytes of memory to copy */ li r6,0x100 /* Start offset, the first 0x100 */ /* bytes were copied earlier. */ +#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 + * kernel, otherwise it will be moved to PHYSICAL_START + */ + ld r7,__kdump_flag-_stext(r26) + cmpldi cr0,r7,1 + bne 3f + + li r5,__end_interrupts - _stext /* just copy interrupts */ + b 5f +3: +#endif + lis r5,(copy_to_here - _stext)@ha + addi r5,r5,(copy_to_here - _stext)@l /* # bytes of memory to copy */ + bl .copy_and_flush /* copy the first n bytes */ /* this includes the code being */ /* executed here. */ @@ -1411,15 +1438,15 @@ _STATIC(__after_prom_start) mtctr r8 bctr +p_end: .llong _end - _stext + 4: /* Now copy the rest of the kernel up to _end */ addis r5,r26,(p_end - _stext)@ha ld r5,(p_end - _stext)@l(r5) /* get _end */ - bl .copy_and_flush /* copy the rest */ +5: bl .copy_and_flush /* copy the rest */ 9: b .start_here_multiplatform -p_end: .llong _end - _stext - /* * Copy routine used to copy the kernel to start at physical address 0 * and flush and invalidate the caches as needed. |