[PATCH] powerpc: Kill _machine and hard-coded platform numbers

[safe/jmp/linux-2.6] / arch / powerpc / kernel / prom_init.c

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 0d08878..d66c5e7 100644 (file)
--- 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)