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author | David S. Miller <davem@davemloft.net> | 2009-03-28 00:19:16 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2009-03-28 00:19:16 (GMT) |
commit | a83398570e17af6bb81eb94f4f5dd356bd2828d8 (patch) | |
tree | 5b5c7c3a56898485479291b7c964a1f3887d469c /arch/sh/kernel/machine_kexec.c | |
parent | f9384d41c02408dd404aa64d66d0ef38adcf6479 (diff) | |
parent | 0b4d569de222452bcb55a4a536ade6cf4d8d1e30 (diff) | |
download | linux-fsl-qoriq-a83398570e17af6bb81eb94f4f5dd356bd2828d8.tar.xz |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'arch/sh/kernel/machine_kexec.c')
-rw-r--r-- | arch/sh/kernel/machine_kexec.c | 74 |
1 files changed, 61 insertions, 13 deletions
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c index 94df56b..7ea2704 100644 --- a/arch/sh/kernel/machine_kexec.c +++ b/arch/sh/kernel/machine_kexec.c @@ -14,21 +14,22 @@ #include <linux/delay.h> #include <linux/reboot.h> #include <linux/numa.h> +#include <linux/ftrace.h> +#include <linux/suspend.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/mmu_context.h> #include <asm/io.h> #include <asm/cacheflush.h> -typedef NORET_TYPE void (*relocate_new_kernel_t)( - unsigned long indirection_page, - unsigned long reboot_code_buffer, - unsigned long start_address, - unsigned long vbr_reg) ATTRIB_NORET; +typedef void (*relocate_new_kernel_t)(unsigned long indirection_page, + unsigned long reboot_code_buffer, + unsigned long start_address); extern const unsigned char relocate_new_kernel[]; extern const unsigned int relocate_new_kernel_size; extern void *gdb_vbr_vector; +extern void *vbr_base; void machine_shutdown(void) { @@ -45,6 +46,12 @@ void machine_crash_shutdown(struct pt_regs *regs) */ int machine_kexec_prepare(struct kimage *image) { + /* older versions of kexec-tools are passing + * the zImage entry point as a virtual address. + */ + if (image->start != PHYSADDR(image->start)) + return -EINVAL; /* upgrade your kexec-tools */ + return 0; } @@ -73,17 +80,33 @@ static void kexec_info(struct kimage *image) */ void machine_kexec(struct kimage *image) { - unsigned long page_list; unsigned long reboot_code_buffer; - unsigned long vbr_reg; relocate_new_kernel_t rnk; + unsigned long entry; + unsigned long *ptr; + int save_ftrace_enabled; + + /* + * Nicked from the mips version of machine_kexec(): + * The generic kexec code builds a page list with physical + * addresses. Use phys_to_virt() to convert them to virtual. + */ + for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); + ptr = (entry & IND_INDIRECTION) ? + phys_to_virt(entry & PAGE_MASK) : ptr + 1) { + if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION || + *ptr & IND_DESTINATION) + *ptr = (unsigned long) phys_to_virt(*ptr); + } -#if defined(CONFIG_SH_STANDARD_BIOS) - vbr_reg = ((unsigned long )gdb_vbr_vector) - 0x100; -#else - vbr_reg = 0x80000000; // dummy +#ifdef CONFIG_KEXEC_JUMP + if (image->preserve_context) + save_processor_state(); #endif + + save_ftrace_enabled = __ftrace_enabled_save(); + /* Interrupts aren't acceptable while we reboot */ local_irq_disable(); @@ -97,12 +120,37 @@ void machine_kexec(struct kimage *image) memcpy((void *)reboot_code_buffer, relocate_new_kernel, relocate_new_kernel_size); - kexec_info(image); + kexec_info(image); flush_cache_all(); +#if defined(CONFIG_SH_STANDARD_BIOS) + asm volatile("ldc %0, vbr" : + : "r" (((unsigned long) gdb_vbr_vector) - 0x100) + : "memory"); +#endif + /* now call it */ rnk = (relocate_new_kernel_t) reboot_code_buffer; - (*rnk)(page_list, reboot_code_buffer, P2SEGADDR(image->start), vbr_reg); + (*rnk)(page_list, reboot_code_buffer, + (unsigned long)phys_to_virt(image->start)); + +#ifdef CONFIG_KEXEC_JUMP + asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory"); + + if (image->preserve_context) + restore_processor_state(); + + /* Convert page list back to physical addresses, what a mess. */ + for (ptr = &image->head; (entry = *ptr) && !(entry & IND_DONE); + ptr = (*ptr & IND_INDIRECTION) ? + phys_to_virt(*ptr & PAGE_MASK) : ptr + 1) { + if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION || + *ptr & IND_DESTINATION) + *ptr = virt_to_phys(*ptr); + } +#endif + + __ftrace_enabled_restore(save_ftrace_enabled); } void arch_crash_save_vmcoreinfo(void) |