diff options
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 68 |
1 files changed, 62 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index bcdc209dca8525..d963a12ec64000 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -137,8 +137,8 @@ struct prom_t { }; struct mem_map_entry { - unsigned long base; - unsigned long size; + u64 base; + u64 size; }; typedef u32 cell_t; @@ -192,6 +192,11 @@ static unsigned long __initdata alloc_bottom; static unsigned long __initdata rmo_top; static unsigned long __initdata ram_top; +#ifdef CONFIG_KEXEC +static unsigned long __initdata prom_crashk_base; +static unsigned long __initdata prom_crashk_size; +#endif + static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; static int __initdata mem_reserve_cnt; @@ -553,7 +558,8 @@ unsigned long prom_memparse(const char *ptr, const char **retptr) static void __init early_cmdline_parse(void) { struct prom_t *_prom = &RELOC(prom); - char *opt, *p; + const char *opt; + char *p; int l = 0; RELOC(prom_cmd_line[0]) = 0; @@ -590,6 +596,34 @@ static void __init early_cmdline_parse(void) RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); #endif } + +#ifdef CONFIG_KEXEC + /* + * crashkernel=size@addr specifies the location to reserve for + * crash kernel. + */ + opt = strstr(RELOC(prom_cmd_line), RELOC("crashkernel=")); + if (opt) { + opt += 12; + RELOC(prom_crashk_size) = prom_memparse(opt, &opt); + + if (ALIGN(RELOC(prom_crashk_size), 0x1000000) != + RELOC(prom_crashk_size)) { + prom_printf("Warning: crashkernel size is not " + "aligned to 16MB\n"); + } + + /* + * At present, the crash kernel always run at 32MB. + * Just ignore whatever user passed. + */ + RELOC(prom_crashk_base) = 0x2000000; + if (*opt == '@') { + prom_printf("Warning: PPC64 kdump kernel always runs " + "at 32 MB\n"); + } + } +#endif } #ifdef CONFIG_PPC_PSERIES @@ -863,9 +897,9 @@ static unsigned long __init prom_next_cell(int s, cell_t **cellp) * If problems seem to show up, it would be a good start to track * them down. */ -static void reserve_mem(unsigned long base, unsigned long size) +static void reserve_mem(u64 base, u64 size) { - unsigned long top = base + size; + u64 top = base + size; unsigned long cnt = RELOC(mem_reserve_cnt); if (size == 0) @@ -1011,6 +1045,12 @@ static void __init prom_init_mem(void) prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); prom_printf(" ram_top : %x\n", RELOC(ram_top)); +#ifdef CONFIG_KEXEC + if (RELOC(prom_crashk_base)) { + prom_printf(" crashk_base : %x\n", RELOC(prom_crashk_base)); + prom_printf(" crashk_size : %x\n", RELOC(prom_crashk_size)); + } +#endif } @@ -1500,6 +1540,8 @@ static int __init prom_find_machine_type(void) #ifdef CONFIG_PPC64 if (strstr(p, RELOC("Momentum,Maple"))) return PLATFORM_MAPLE; + if (strstr(p, RELOC("IBM,CPB"))) + return PLATFORM_CELL; #endif i += sl + 1; } @@ -1994,7 +2036,7 @@ static void __init prom_check_initrd(unsigned long r3, unsigned long r4) if (r3 && r4 && r4 != 0xdeadbeef) { unsigned long val; - RELOC(prom_initrd_start) = (r3 >= KERNELBASE) ? __pa(r3) : r3; + RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; val = RELOC(prom_initrd_start); @@ -2094,6 +2136,10 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, */ prom_init_mem(); +#ifdef CONFIG_KEXEC + if (RELOC(prom_crashk_base)) + reserve_mem(RELOC(prom_crashk_base), RELOC(prom_crashk_size)); +#endif /* * Determine which cpu is actually running right _now_ */ @@ -2150,6 +2196,16 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, } #endif +#ifdef CONFIG_KEXEC + if (RELOC(prom_crashk_base)) { + prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-base", + PTRRELOC(&prom_crashk_base), + sizeof(RELOC(prom_crashk_base))); + prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-size", + PTRRELOC(&prom_crashk_size), + sizeof(RELOC(prom_crashk_size))); + } +#endif /* * Fixup any known bugs in the device-tree */ |