1 files changed, 155 insertions, 10 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index d66c5e77fcff..41e9ab40cd54 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -636,10 +636,96 @@ static void __init early_cmdline_parse(void)
 
 #ifdef CONFIG_PPC_PSERIES
 /*
- * To tell the firmware what our capabilities are, we have to pass
- * it a fake 32-bit ELF header containing a couple of PT_NOTE sections
- * that contain structures that contain the actual values.
+ * There are two methods for telling firmware what our capabilities are.
+ * Newer machines have an "ibm,client-architecture-support" method on the
+ * root node.  For older machines, we have to call the "process-elf-header"
+ * method in the /packages/elf-loader node, passing it a fake 32-bit
+ * ELF header containing a couple of PT_NOTE sections that contain
+ * structures that contain various information.
  */
+
+/*
+ * New method - extensible architecture description vector.
+ *
+ * Because the description vector contains a mix of byte and word
+ * values, we declare it as an unsigned char array, and use this
+ * macro to put word values in.
+ */
+#define W(x)    ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
+                ((x) >> 8) & 0xff, (x) & 0xff
+
+/* Option vector bits - generic bits in byte 1 */
+#define OV_IGNORE               0x80    /* ignore this vector */
+#define OV_CESSATION_POLICY     0x40    /* halt if unsupported option present*/
+
+/* Option vector 1: processor architectures supported */
+#define OV1_PPC_2_00            0x80    /* set if we support PowerPC 2.00 */
+#define OV1_PPC_2_01            0x40    /* set if we support PowerPC 2.01 */
+#define OV1_PPC_2_02            0x20    /* set if we support PowerPC 2.02 */
+#define OV1_PPC_2_03            0x10    /* set if we support PowerPC 2.03 */
+#define OV1_PPC_2_04            0x08    /* set if we support PowerPC 2.04 */
+#define OV1_PPC_2_05            0x04    /* set if we support PowerPC 2.05 */
+
+/* Option vector 2: Open Firmware options supported */
+#define OV2_REAL_MODE           0x20    /* set if we want OF in real mode */
+
+/* Option vector 3: processor options supported */
+#define OV3_FP                  0x80    /* floating point */
+#define OV3_VMX                 0x40    /* VMX/Altivec */
+
+/* Option vector 5: PAPR/OF options supported */
+#define OV5_LPAR                0x80    /* logical partitioning supported */
+#define OV5_SPLPAR              0x40    /* shared-processor LPAR supported */
+/* ibm,dynamic-reconfiguration-memory property supported */
+#define OV5_DRCONF_MEMORY       0x20
+#define OV5_LARGE_PAGES         0x10    /* large pages supported */
+
+/*
+ * The architecture vector has an array of PVR mask/value pairs,
+ * followed by # option vectors - 1, followed by the option vectors.
+ */
+static unsigned char ibm_architecture_vec[] = {
+        W(0xfffe0000), W(0x003a0000),   /* POWER5/POWER5+ */
+        W(0xffff0000), W(0x003e0000),   /* POWER6 */
+        W(0xfffffffe), W(0x0f000001),   /* all 2.04-compliant and earlier */
+        5 - 1,                          /* 5 option vectors */
+
+        /* option vector 1: processor architectures supported */
+        3 - 1,                          /* length */
+        0,                              /* don't ignore, don't halt */
+        OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
+        OV1_PPC_2_04 | OV1_PPC_2_05,
+
+        /* option vector 2: Open Firmware options supported */
+        34 - 1,                         /* length */
+        OV2_REAL_MODE,
+        0, 0,
+        W(0xffffffff),                  /* real_base */
+        W(0xffffffff),                  /* real_size */
+        W(0xffffffff),                  /* virt_base */
+        W(0xffffffff),                  /* virt_size */
+        W(0xffffffff),                  /* load_base */
+        W(64),                          /* 128MB min RMA */
+        W(0xffffffff),                  /* full client load */
+        0,                              /* min RMA percentage of total RAM */
+        48,                             /* max log_2(hash table size) */
+
+        /* option vector 3: processor options supported */
+        3 - 1,                          /* length */
+        0,                              /* don't ignore, don't halt */
+        OV3_FP | OV3_VMX,
+
+        /* option vector 4: IBM PAPR implementation */
+        2 - 1,                          /* length */
+        0,                              /* don't halt */
+
+        /* option vector 5: PAPR/OF options */
+        3 - 1,                          /* length */
+        0,                              /* don't ignore, don't halt */
+        OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES,
+};
+
+/* Old method - ELF header with PT_NOTE sections */
 static struct fake_elf {
         Elf32_Ehdr      elfhdr;
         Elf32_Phdr      phdr[2];
@@ -728,8 +814,26 @@ static struct fake_elf {
 
 static void __init prom_send_capabilities(void)
 {
-        ihandle elfloader;
+        ihandle elfloader, root;
+        prom_arg_t ret;
+
+        root = call_prom("open", 1, 1, ADDR("/"));
+        if (root != 0) {
+                /* try calling the ibm,client-architecture-support method */
+                if (call_prom_ret("call-method", 3, 2, &ret,
+                                  ADDR("ibm,client-architecture-support"),
+                                  ADDR(ibm_architecture_vec)) == 0) {
+                        /* the call exists... */
+                        if (ret)
+                                prom_printf("WARNING: ibm,client-architecture"
+                                            "-support call FAILED!\n");
+                        call_prom("close", 1, 0, root);
+                        return;
+                }
+                call_prom("close", 1, 0, root);
+        }
 
+        /* no ibm,client-architecture-support call, try the old way */
         elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
         if (elfloader == 0) {
                 prom_printf("couldn't open /packages/elf-loader\n");
@@ -1528,12 +1632,11 @@ static int __init prom_find_machine_type(void)
          *    non-IBM designs !
          *  - it has /rtas
          */
-        len = prom_getprop(_prom->root, "model",
+        len = prom_getprop(_prom->root, "device_type",
                            compat, sizeof(compat)-1);
         if (len <= 0)
                 return PLATFORM_GENERIC;
-        compat[len] = 0;
-        if (strcmp(compat, "chrp"))
+        if (strcmp(compat, RELOC("chrp")))
                 return PLATFORM_GENERIC;
 
         /* Default to pSeries. We need to know if we are running LPAR */
@@ -1954,10 +2057,45 @@ static void __init flatten_device_tree(void)
 
 }
 
-
-static void __init fixup_device_tree(void)
+#ifdef CONFIG_PPC_MAPLE
+/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
+ * The values are bad, and it doesn't even have the right number of cells. */
+static void __init fixup_device_tree_maple(void)
 {
+        phandle isa;
+        u32 isa_ranges[6];
+
+        isa = call_prom("finddevice", 1, 1, ADDR("/ht@0/isa@4"));
+        if (!PHANDLE_VALID(isa))
+                return;
+
+        if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
+                == PROM_ERROR)
+                return;
+
+        if (isa_ranges[0] != 0x1 ||
+                isa_ranges[1] != 0xf4000000 ||
+                isa_ranges[2] != 0x00010000)
+                return;
+
+        prom_printf("fixing up bogus ISA range on Maple...\n");
+
+        isa_ranges[0] = 0x1;
+        isa_ranges[1] = 0x0;
+        isa_ranges[2] = 0x01002000; /* IO space; PCI device = 4 */
+        isa_ranges[3] = 0x0;
+        isa_ranges[4] = 0x0;
+        isa_ranges[5] = 0x00010000;
+        prom_setprop(isa, "/ht@0/isa@4", "ranges",
+                        isa_ranges, sizeof(isa_ranges));
+}
+#else
+#define fixup_device_tree_maple()
+#endif
+
 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
+static void __init fixup_device_tree_pmac(void)
+{
         phandle u3, i2c, mpic;
         u32 u3_rev;
         u32 interrupts[2];
@@ -1994,9 +2132,16 @@ static void __init fixup_device_tree(void)
         parent = (u32)mpic;
         prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
                      &parent, sizeof(parent));
-#endif
 }
+#else
+#define fixup_device_tree_pmac()
+#endif
 
+static void __init fixup_device_tree(void)
+{
+        fixup_device_tree_maple();
+        fixup_device_tree_pmac();
+}
 
 static void __init prom_find_boot_cpu(void)
 {