diff options
Diffstat (limited to 'arch/sh/kernel/machine_kexec.c')
| -rw-r--r-- | arch/sh/kernel/machine_kexec.c | 84 |
1 files changed, 66 insertions, 18 deletions
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c index 7ea2704..e2a3af3 100644 --- a/arch/sh/kernel/machine_kexec.c +++ b/arch/sh/kernel/machine_kexec.c @@ -8,7 +8,6 @@ * This source code is licensed under the GNU General Public License, * Version 2. See the file COPYING for more details. */ - #include <linux/mm.h> #include <linux/kexec.h> #include <linux/delay.h> @@ -16,11 +15,14 @@ #include <linux/numa.h> #include <linux/ftrace.h> #include <linux/suspend.h> +#include <linux/memblock.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/mmu_context.h> #include <asm/io.h> #include <asm/cacheflush.h> +#include <asm/sh_bios.h> +#include <asm/reboot.h> typedef void (*relocate_new_kernel_t)(unsigned long indirection_page, unsigned long reboot_code_buffer, @@ -28,15 +30,11 @@ typedef void (*relocate_new_kernel_t)(unsigned long indirection_page, 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) -{ -} - -void machine_crash_shutdown(struct pt_regs *regs) +void native_machine_crash_shutdown(struct pt_regs *regs) { + /* Nothing to do for UP, but definitely broken for SMP.. */ } /* @@ -46,12 +44,6 @@ 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; } @@ -123,11 +115,7 @@ void machine_kexec(struct kimage *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 + sh_bios_vbr_reload(); /* now call it */ rnk = (relocate_new_kernel_t) reboot_code_buffer; @@ -159,4 +147,64 @@ void arch_crash_save_vmcoreinfo(void) VMCOREINFO_SYMBOL(node_data); VMCOREINFO_LENGTH(node_data, MAX_NUMNODES); #endif +#ifdef CONFIG_X2TLB + VMCOREINFO_CONFIG(X2TLB); +#endif +} + +void __init reserve_crashkernel(void) +{ + unsigned long long crash_size, crash_base; + int ret; + + /* this is necessary because of memblock_phys_mem_size() */ + memblock_analyze(); + + ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(), + &crash_size, &crash_base); + if (ret == 0 && crash_size > 0) { + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + } + + if (crashk_res.end == crashk_res.start) + goto disable; + + crash_size = PAGE_ALIGN(crashk_res.end - crashk_res.start + 1); + if (!crashk_res.start) { + unsigned long max = memblock_end_of_DRAM() - memory_limit; + crashk_res.start = __memblock_alloc_base(crash_size, PAGE_SIZE, max); + if (!crashk_res.start) { + pr_err("crashkernel allocation failed\n"); + goto disable; + } + } else { + ret = memblock_reserve(crashk_res.start, crash_size); + if (unlikely(ret < 0)) { + pr_err("crashkernel reservation failed - " + "memory is in use\n"); + goto disable; + } + } + + crashk_res.end = crashk_res.start + crash_size - 1; + + /* + * Crash kernel trumps memory limit + */ + if ((memblock_end_of_DRAM() - memory_limit) <= crashk_res.end) { + memory_limit = 0; + pr_info("Disabled memory limit for crashkernel\n"); + } + + pr_info("Reserving %ldMB of memory at 0x%08lx " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crashk_res.start), + (unsigned long)(memblock_phys_mem_size() >> 20)); + + return; + +disable: + crashk_res.start = crashk_res.end = 0; } |