diff options
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 51 |
1 files changed, 34 insertions, 17 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index 0d088784450..d66c5e77fcf 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -180,6 +180,16 @@ static unsigned long __initdata prom_tce_alloc_start; static unsigned long __initdata prom_tce_alloc_end; #endif +/* Platforms codes are now obsolete in the kernel. Now only used within this + * file and ultimately gone too. Feel free to change them if you need, they + * are not shared with anything outside of this file anymore + */ +#define PLATFORM_PSERIES 0x0100 +#define PLATFORM_PSERIES_LPAR 0x0101 +#define PLATFORM_LPAR 0x0001 +#define PLATFORM_POWERMAC 0x0400 +#define PLATFORM_GENERIC 0x0500 + static int __initdata of_platform; static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; @@ -1492,7 +1502,10 @@ static int __init prom_find_machine_type(void) int len, i = 0; #ifdef CONFIG_PPC64 phandle rtas; + int x; #endif + + /* Look for a PowerMac */ len = prom_getprop(_prom->root, "compatible", compat, sizeof(compat)-1); if (len > 0) { @@ -1505,28 +1518,36 @@ static int __init prom_find_machine_type(void) if (strstr(p, RELOC("Power Macintosh")) || strstr(p, RELOC("MacRISC"))) return PLATFORM_POWERMAC; -#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; } } #ifdef CONFIG_PPC64 + /* If not a mac, try to figure out if it's an IBM pSeries or any other + * PAPR compliant platform. We assume it is if : + * - /device_type is "chrp" (please, do NOT use that for future + * non-IBM designs ! + * - it has /rtas + */ + len = prom_getprop(_prom->root, "model", + compat, sizeof(compat)-1); + if (len <= 0) + return PLATFORM_GENERIC; + compat[len] = 0; + if (strcmp(compat, "chrp")) + return PLATFORM_GENERIC; + /* Default to pSeries. We need to know if we are running LPAR */ rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); - if (PHANDLE_VALID(rtas)) { - int x = prom_getproplen(rtas, "ibm,hypertas-functions"); - if (x != PROM_ERROR) { - prom_printf("Hypertas detected, assuming LPAR !\n"); - return PLATFORM_PSERIES_LPAR; - } + if (!PHANDLE_VALID(rtas)) + return PLATFORM_GENERIC; + x = prom_getproplen(rtas, "ibm,hypertas-functions"); + if (x != PROM_ERROR) { + prom_printf("Hypertas detected, assuming LPAR !\n"); + return PLATFORM_PSERIES_LPAR; } return PLATFORM_PSERIES; #else - return PLATFORM_CHRP; + return PLATFORM_GENERIC; #endif } @@ -2034,7 +2055,6 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, { struct prom_t *_prom; unsigned long hdr; - u32 getprop_rval; unsigned long offset = reloc_offset(); #ifdef CONFIG_PPC32 @@ -2070,9 +2090,6 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, * between pSeries SMP and pSeries LPAR */ RELOC(of_platform) = prom_find_machine_type(); - getprop_rval = RELOC(of_platform); - prom_setprop(_prom->chosen, "/chosen", "linux,platform", - &getprop_rval, sizeof(getprop_rval)); /* Bail if this is a kdump kernel. */ if (PHYSICAL_START > 0) |