From 7d7712a385d5b0a6f921dbd9b66ad3aaed387b5e Mon Sep 17 00:00:00 2001 From: Bernhard Walle Date: Thu, 18 Oct 2007 23:41:02 -0700 Subject: [PATCH] Use extended crashkernel command line on sh This patch removes the crashkernel parsing from arch/sh/kernel/machine_kexec.c and calls the generic function, introduced in the generic patch, in setup_bootmem_allocator(). This is necessary because the amount of System RAM must be known in this function now because of the new syntax. Signed-off-by: Bernhard Walle Acked-by: Paul Mundt Cc: Vivek Goyal Cc: "Eric W. Biederman" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/sh/kernel/machine_kexec.c | 21 --------------------- arch/sh/kernel/setup.c | 38 +++++++++++++++++++++++++++++++++----- 2 files changed, 33 insertions(+), 26 deletions(-) diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c index 790ed69..5c17de5 100644 --- a/arch/sh/kernel/machine_kexec.c +++ b/arch/sh/kernel/machine_kexec.c @@ -104,24 +104,3 @@ NORET_TYPE void machine_kexec(struct kimage *image) (*rnk)(page_list, reboot_code_buffer, image->start, vbr_reg); } -/* crashkernel=size@addr specifies the location to reserve for - * a crash kernel. By reserving this memory we guarantee - * that linux never sets it up as a DMA target. - * Useful for holding code to do something appropriate - * after a kernel panic. - */ -static int __init parse_crashkernel(char *arg) -{ - unsigned long size, base; - size = memparse(arg, &arg); - if (*arg == '@') { - base = memparse(arg+1, &arg); - /* FIXME: Do I want a sanity check - * to validate the memory range? - */ - crashk_res.start = base; - crashk_res.end = base + size - 1; - } - return 0; -} -early_param("crashkernel", parse_crashkernel); diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index b3027a6..b749403 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -128,6 +128,37 @@ static void __init register_bootmem_low_pages(void) free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); } +#ifdef CONFIG_KEXEC +static void __init reserve_crashkernel(void) +{ + unsigned long long free_mem; + unsigned long long crash_size, crash_base; + int ret; + + free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; + + ret = parse_crashkernel(boot_command_line, free_mem, + &crash_size, &crash_base); + if (ret == 0 && crash_size) { + if (crash_base > 0) { + printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crash_base >> 20), + (unsigned long)(free_mem >> 20)); + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + reserve_bootmem(crash_base, crash_size); + } else + printk(KERN_INFO "crashkernel reservation failed - " + "you have to specify a base address\n"); + } +} +#else +static inline void __init reserve_crashkernel(void) +{} +#endif + void __init setup_bootmem_allocator(unsigned long free_pfn) { unsigned long bootmap_size; @@ -189,11 +220,8 @@ void __init setup_bootmem_allocator(unsigned long free_pfn) } } #endif -#ifdef CONFIG_KEXEC - if (crashk_res.start != crashk_res.end) - reserve_bootmem(crashk_res.start, - crashk_res.end - crashk_res.start + 1); -#endif + + reserve_crashkernel(); } #ifndef CONFIG_NEED_MULTIPLE_NODES -- 2.7.4