diff options
| -rw-r--r-- | arch/powerpc/kernel/crash_dump.c | 11 | ||||
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 4 | ||||
| -rw-r--r-- | include/asm-powerpc/kdump.h | 29 | ||||
| -rw-r--r-- | include/asm-powerpc/page.h | 8 |
5 files changed, 38 insertions, 18 deletions
diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c index 764d0732971..371973be8d7 100644 --- a/arch/powerpc/kernel/crash_dump.c +++ b/arch/powerpc/kernel/crash_dump.c @@ -25,6 +25,11 @@ #define DBG(fmt...) #endif +void reserve_kdump_trampoline(void) +{ + lmb_reserve(0, KDUMP_RESERVE_LIMIT); +} + static void __init create_trampoline(unsigned long addr) { /* The maximum range of a single instruction branch, is the current @@ -39,11 +44,11 @@ static void __init create_trampoline(unsigned long addr) create_branch(addr + 4, addr + PHYSICAL_START, 0); } -void __init kdump_setup(void) +void __init setup_kdump_trampoline(void) { unsigned long i; - DBG(" -> kdump_setup()\n"); + DBG(" -> setup_kdump_trampoline()\n"); for (i = KDUMP_TRAMPOLINE_START; i < KDUMP_TRAMPOLINE_END; i += 8) { create_trampoline(i); @@ -52,7 +57,7 @@ void __init kdump_setup(void) create_trampoline(__pa(system_reset_fwnmi) - PHYSICAL_START); create_trampoline(__pa(machine_check_fwnmi) - PHYSICAL_START); - DBG(" <- kdump_setup()\n"); + DBG(" <- setup_kdump_trampoline()\n"); } #ifdef CONFIG_PROC_VMCORE diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index a04f726d3ba..2498afeef29 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -1326,9 +1326,7 @@ void __init early_init_devtree(void *params) /* Reserve LMB regions used by kernel, initrd, dt, etc... */ lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); -#ifdef CONFIG_CRASH_DUMP - lmb_reserve(0, KDUMP_RESERVE_LIMIT); -#endif + reserve_kdump_trampoline(); early_reserve_mem(); lmb_enforce_memory_limit(memory_limit); diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 59773d9044b..78f3a5fd43f 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -193,9 +193,7 @@ void __init early_setup(unsigned long dt_ptr) /* Probe the machine type */ probe_machine(); -#ifdef CONFIG_CRASH_DUMP - kdump_setup(); -#endif + setup_kdump_trampoline(); DBG("Found, Initializing memory management...\n"); diff --git a/include/asm-powerpc/kdump.h b/include/asm-powerpc/kdump.h index a87aed00d61..5a5c3b5ab1e 100644 --- a/include/asm-powerpc/kdump.h +++ b/include/asm-powerpc/kdump.h @@ -1,13 +1,38 @@ #ifndef _PPC64_KDUMP_H #define _PPC64_KDUMP_H +/* Kdump kernel runs at 32 MB, change at your peril. */ +#define KDUMP_KERNELBASE 0x2000000 + /* How many bytes to reserve at zero for kdump. The reserve limit should - * be greater or equal to the trampoline's end address. */ + * be greater or equal to the trampoline's end address. + * Reserve to the end of the FWNMI area, see head_64.S */ #define KDUMP_RESERVE_LIMIT 0x8000 +#ifdef CONFIG_CRASH_DUMP + +#define PHYSICAL_START KDUMP_KERNELBASE #define KDUMP_TRAMPOLINE_START 0x0100 #define KDUMP_TRAMPOLINE_END 0x3000 -extern void kdump_setup(void); +#else /* !CONFIG_CRASH_DUMP */ + +#define PHYSICAL_START 0x0 + +#endif /* CONFIG_CRASH_DUMP */ + +#ifndef __ASSEMBLY__ +#ifdef CONFIG_CRASH_DUMP + +extern void reserve_kdump_trampoline(void); +extern void setup_kdump_trampoline(void); + +#else /* !CONFIG_CRASH_DUMP */ + +static inline void reserve_kdump_trampoline(void) { ; } +static inline void setup_kdump_trampoline(void) { ; } + +#endif /* CONFIG_CRASH_DUMP */ +#endif /* __ASSEMBLY__ */ #endif /* __PPC64_KDUMP_H */ diff --git a/include/asm-powerpc/page.h b/include/asm-powerpc/page.h index 2fbecebe1c9..ae610b62048 100644 --- a/include/asm-powerpc/page.h +++ b/include/asm-powerpc/page.h @@ -13,6 +13,7 @@ #ifdef __KERNEL__ #include <linux/config.h> #include <asm/asm-compat.h> +#include <asm/kdump.h> /* * On PPC32 page size is 4K. For PPC64 we support either 4K or 64K software @@ -52,13 +53,6 @@ * If you want to test if something's a kernel address, use is_kernel_addr(). */ -#ifdef CONFIG_CRASH_DUMP -/* Kdump kernel runs at 32 MB, change at your peril. */ -#define PHYSICAL_START 0x2000000 -#else -#define PHYSICAL_START 0x0 -#endif - #define PAGE_OFFSET ASM_CONST(CONFIG_KERNEL_START) #define KERNELBASE (PAGE_OFFSET + PHYSICAL_START) |