powerpc: Provide a suitable AT_PLATFORM value

The glibc folks want to use AT_PLATFORM to select between possible
alternative versions of shared libraries.  This commit makes the kernel
supply an AT_PLATFORM string that indicates what class of processor
we are running on.  Processors with the same set of user-level
instructions and roughly the same instruction scheduling characteristics
are given the same AT_PLATFORM value; for example, 821, 823 and 860
are all reported as "ppc823", and 7447, 7447A, 7448, 7450, 7451, 7455
are all called "ppc7450".

The intention is that the AT_PLATFORM values match the values that
gcc accepts for the -mcpu= option.  For values which are numeric
(e.g. -mcpu=750), "ppc" has been prepended.

This also adds a PPC_FEATURE_BOOKE bit to the AT_HWCAP value and sets
it for the 440 family and the Freescale 85xx family.

Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 139 insertions, 53 deletions

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 43c74a6b07b1..cf1eea1a2299 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -55,7 +55,8 @@ extern void __setup_cpu_ppc970(unsigned long offset, struct cpu_spec* spec);
 #define COMMON_USER_POWER4	(COMMON_USER_PPC64 | PPC_FEATURE_POWER4)
 #define COMMON_USER_POWER5	(COMMON_USER_PPC64 | PPC_FEATURE_POWER5)
 #define COMMON_USER_POWER5_PLUS	(COMMON_USER_PPC64 | PPC_FEATURE_POWER5_PLUS)
-
+#define COMMON_USER_BOOKE	(PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU | \
+				 PPC_FEATURE_BOOKE)
 
 /* We only set the spe features if the kernel was compiled with
  * spe support
@@ -80,6 +81,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= RS64,
+		.platform		= "power3",
 	},
 	{	/* Power3+ */
 		.pvr_mask		= 0xffff0000,
@@ -93,6 +95,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= RS64,
+		.platform		= "power3",
 	},
 	{	/* Northstar */
 		.pvr_mask		= 0xffff0000,
@@ -106,6 +109,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= RS64,
+		.platform		= "rs64",
 	},
 	{	/* Pulsar */
 		.pvr_mask		= 0xffff0000,
@@ -119,6 +123,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= RS64,
+		.platform		= "rs64",
 	},
 	{	/* I-star */
 		.pvr_mask		= 0xffff0000,
@@ -132,6 +137,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= RS64,
+		.platform		= "rs64",
 	},
 	{	/* S-star */
 		.pvr_mask		= 0xffff0000,
@@ -145,6 +151,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power3,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= RS64,
+		.platform		= "rs64",
 	},
 	{	/* Power4 */
 		.pvr_mask		= 0xffff0000,
@@ -158,6 +165,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= POWER4,
+		.platform		= "power4",
 	},
 	{	/* Power4+ */
 		.pvr_mask		= 0xffff0000,
@@ -171,6 +179,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= POWER4,
+		.platform		= "power4",
 	},
 	{	/* PPC970 */
 		.pvr_mask		= 0xffff0000,
@@ -185,6 +194,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= POWER4,
+		.platform		= "ppc970",
 	},
 #endif /* CONFIG_PPC64 */
 #if defined(CONFIG_PPC64) || defined(CONFIG_POWER4)
@@ -205,6 +215,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= POWER4,
+		.platform		= "ppc970",
 	},
 #endif /* defined(CONFIG_PPC64) || defined(CONFIG_POWER4) */
 #ifdef CONFIG_PPC64
@@ -220,6 +231,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= POWER4,
+		.platform		= "ppc970",
 	},
 	{	/* Power5 GR */
 		.pvr_mask		= 0xffff0000,
@@ -233,6 +245,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power5",
 		.oprofile_type		= POWER4,
+		.platform		= "power5",
 	},
 	{	/* Power5 GS */
 		.pvr_mask		= 0xffff0000,
@@ -246,6 +259,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_power4,
 		.oprofile_cpu_type	= "ppc64/power5+",
 		.oprofile_type		= POWER4,
+		.platform		= "power5+",
 	},
 	{	/* Cell Broadband Engine */
 		.pvr_mask		= 0xffff0000,
@@ -257,6 +271,7 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.cpu_setup		= __setup_cpu_be,
+		.platform		= "ppc-cell-be",
 	},
 	{	/* default match */
 		.pvr_mask		= 0x00000000,
@@ -268,6 +283,7 @@ struct cpu_spec	cpu_specs[] = {
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
 		.cpu_setup		= __setup_cpu_power4,
+		.platform		= "power4",
 	}
 #endif	/* CONFIG_PPC64 */
 #ifdef CONFIG_PPC32
@@ -281,6 +297,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_UNIFIED_CACHE | PPC_FEATURE_NO_TB,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc601",
 	},
 	{	/* 603 */
 		.pvr_mask		= 0xffff0000,
@@ -290,7 +307,8 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
-		.cpu_setup		= __setup_cpu_603
+		.cpu_setup		= __setup_cpu_603,
+		.platform		= "ppc603",
 	},
 	{	/* 603e */
 		.pvr_mask		= 0xffff0000,
@@ -300,7 +318,8 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
-		.cpu_setup		= __setup_cpu_603
+		.cpu_setup		= __setup_cpu_603,
+		.platform		= "ppc603",
 	},
 	{	/* 603ev */
 		.pvr_mask		= 0xffff0000,
@@ -310,7 +329,8 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
-		.cpu_setup		= __setup_cpu_603
+		.cpu_setup		= __setup_cpu_603,
+		.platform		= "ppc603",
 	},
 	{	/* 604 */
 		.pvr_mask		= 0xffff0000,
@@ -321,7 +341,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 2,
-		.cpu_setup		= __setup_cpu_604
+		.cpu_setup		= __setup_cpu_604,
+		.platform		= "ppc604",
 	},
 	{	/* 604e */
 		.pvr_mask		= 0xfffff000,
@@ -332,7 +353,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_604
+		.cpu_setup		= __setup_cpu_604,
+		.platform		= "ppc604",
 	},
 	{	/* 604r */
 		.pvr_mask		= 0xffff0000,
@@ -343,7 +365,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_604
+		.cpu_setup		= __setup_cpu_604,
+		.platform		= "ppc604",
 	},
 	{	/* 604ev */
 		.pvr_mask		= 0xffff0000,
@@ -354,7 +377,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_604
+		.cpu_setup		= __setup_cpu_604,
+		.platform		= "ppc604",
 	},
 	{	/* 740/750 (0x4202, don't support TAU ?) */
 		.pvr_mask		= 0xffffffff,
@@ -365,7 +389,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750
+		.cpu_setup		= __setup_cpu_750,
+		.platform		= "ppc750",
 	},
 	{	/* 750CX (80100 and 8010x?) */
 		.pvr_mask		= 0xfffffff0,
@@ -376,7 +401,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750cx
+		.cpu_setup		= __setup_cpu_750cx,
+		.platform		= "ppc750",
 	},
 	{	/* 750CX (82201 and 82202) */
 		.pvr_mask		= 0xfffffff0,
@@ -387,7 +413,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750cx
+		.cpu_setup		= __setup_cpu_750cx,
+		.platform		= "ppc750",
 	},
 	{	/* 750CXe (82214) */
 		.pvr_mask		= 0xfffffff0,
@@ -398,7 +425,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750cx
+		.cpu_setup		= __setup_cpu_750cx,
+		.platform		= "ppc750",
 	},
 	{	/* 750CXe "Gekko" (83214) */
 		.pvr_mask		= 0xffffffff,
@@ -409,7 +437,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750cx
+		.cpu_setup		= __setup_cpu_750cx,
+		.platform		= "ppc750",
 	},
 	{	/* 745/755 */
 		.pvr_mask		= 0xfffff000,
@@ -420,7 +449,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750
+		.cpu_setup		= __setup_cpu_750,
+		.platform		= "ppc750",
 	},
 	{	/* 750FX rev 1.x */
 		.pvr_mask		= 0xffffff00,
@@ -431,7 +461,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750
+		.cpu_setup		= __setup_cpu_750,
+		.platform		= "ppc750",
 	},
 	{	/* 750FX rev 2.0 must disable HID0[DPM] */
 		.pvr_mask		= 0xffffffff,
@@ -442,7 +473,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750
+		.cpu_setup		= __setup_cpu_750,
+		.platform		= "ppc750",
 	},
 	{	/* 750FX (All revs except 2.0) */
 		.pvr_mask		= 0xffff0000,
@@ -453,7 +485,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750fx
+		.cpu_setup		= __setup_cpu_750fx,
+		.platform		= "ppc750",
 	},
 	{	/* 750GX */
 		.pvr_mask		= 0xffff0000,
@@ -464,7 +497,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750fx
+		.cpu_setup		= __setup_cpu_750fx,
+		.platform		= "ppc750",
 	},
 	{	/* 740/750 (L2CR bit need fixup for 740) */
 		.pvr_mask		= 0xffff0000,
@@ -475,7 +509,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_750
+		.cpu_setup		= __setup_cpu_750,
+		.platform		= "ppc750",
 	},
 	{	/* 7400 rev 1.1 ? (no TAU) */
 		.pvr_mask		= 0xffffffff,
@@ -486,7 +521,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_7400
+		.cpu_setup		= __setup_cpu_7400,
+		.platform		= "ppc7400",
 	},
 	{	/* 7400 */
 		.pvr_mask		= 0xffff0000,
@@ -497,7 +533,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_7400
+		.cpu_setup		= __setup_cpu_7400,
+		.platform		= "ppc7400",
 	},
 	{	/* 7410 */
 		.pvr_mask		= 0xffff0000,
@@ -508,7 +545,8 @@ struct cpu_spec	cpu_specs[] = {
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
-		.cpu_setup		= __setup_cpu_7410
+		.cpu_setup		= __setup_cpu_7410,
+		.platform		= "ppc7400",
 	},
 	{	/* 7450 2.0 - no doze/nap */
 		.pvr_mask		= 0xffffffff,
@@ -522,6 +560,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7450 2.1 */
 		.pvr_mask		= 0xffffffff,
@@ -535,6 +574,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7450 2.3 and newer */
 		.pvr_mask		= 0xffff0000,
@@ -548,6 +588,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7455 rev 1.x */
 		.pvr_mask		= 0xffffff00,
@@ -561,6 +602,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7455 rev 2.0 */
 		.pvr_mask		= 0xffffffff,
@@ -574,6 +616,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7455 others */
 		.pvr_mask		= 0xffff0000,
@@ -587,6 +630,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7447/7457 Rev 1.0 */
 		.pvr_mask		= 0xffffffff,
@@ -600,6 +644,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7447/7457 Rev 1.1 */
 		.pvr_mask		= 0xffffffff,
@@ -613,6 +658,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7447/7457 Rev 1.2 and later */
 		.pvr_mask		= 0xffff0000,
@@ -626,6 +672,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7447A */
 		.pvr_mask		= 0xffff0000,
@@ -639,6 +686,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 7448 */
 		.pvr_mask		= 0xffff0000,
@@ -652,6 +700,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_745x,
 		.oprofile_cpu_type      = "ppc/7450",
 		.oprofile_type		= G4,
+		.platform		= "ppc7450",
 	},
 	{	/* 82xx (8240, 8245, 8260 are all 603e cores) */
 		.pvr_mask		= 0x7fff0000,
@@ -661,7 +710,8 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
-		.cpu_setup		= __setup_cpu_603
+		.cpu_setup		= __setup_cpu_603,
+		.platform		= "ppc603",
 	},
 	{	/* All G2_LE (603e core, plus some) have the same pvr */
 		.pvr_mask		= 0x7fff0000,
@@ -671,7 +721,8 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
-		.cpu_setup		= __setup_cpu_603
+		.cpu_setup		= __setup_cpu_603,
+		.platform		= "ppc603",
 	},
 	{	/* e300 (a 603e core, plus some) on 83xx */
 		.pvr_mask		= 0x7fff0000,
@@ -681,7 +732,8 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
-		.cpu_setup		= __setup_cpu_603
+		.cpu_setup		= __setup_cpu_603,
+		.platform		= "ppc603",
 	},
 	{	/* default match, we assume split I/D cache & TB (non-601)... */
 		.pvr_mask		= 0x00000000,
@@ -691,6 +743,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= COMMON_USER,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc603",
 	},
 #endif /* CLASSIC_PPC */
 #ifdef CONFIG_8xx
@@ -704,6 +757,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
 		.icache_bsize		= 16,
 		.dcache_bsize		= 16,
+		.platform		= "ppc823",
 	},
 #endif /* CONFIG_8xx */
 #ifdef CONFIG_40x
@@ -715,6 +769,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
 		.icache_bsize		= 16,
 		.dcache_bsize		= 16,
+		.platform		= "ppc403",
 	},
 	{	/* 403GCX */
 		.pvr_mask		= 0xffffff00,
@@ -725,6 +780,7 @@ struct cpu_spec	cpu_specs[] = {
 		 	PPC_FEATURE_HAS_MMU | PPC_FEATURE_NO_TB,
 		.icache_bsize		= 16,
 		.dcache_bsize		= 16,
+		.platform		= "ppc403",
 	},
 	{	/* 403G ?? */
 		.pvr_mask		= 0xffff0000,
@@ -734,6 +790,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
 		.icache_bsize		= 16,
 		.dcache_bsize		= 16,
+		.platform		= "ppc403",
 	},
 	{	/* 405GP */
 		.pvr_mask		= 0xffff0000,
@@ -744,6 +801,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* STB 03xxx */
 		.pvr_mask		= 0xffff0000,
@@ -754,6 +812,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* STB 04xxx */
 		.pvr_mask		= 0xffff0000,
@@ -764,6 +823,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* NP405L */
 		.pvr_mask		= 0xffff0000,
@@ -774,6 +834,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* NP4GS3 */
 		.pvr_mask		= 0xffff0000,
@@ -784,6 +845,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{   /* NP405H */
 		.pvr_mask		= 0xffff0000,
@@ -794,6 +856,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* 405GPr */
 		.pvr_mask		= 0xffff0000,
@@ -804,6 +867,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{   /* STBx25xx */
 		.pvr_mask		= 0xffff0000,
@@ -814,6 +878,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* 405LP */
 		.pvr_mask		= 0xffff0000,
@@ -823,6 +888,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* Xilinx Virtex-II Pro  */
 		.pvr_mask		= 0xffff0000,
@@ -833,6 +899,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 	{	/* 405EP */
 		.pvr_mask		= 0xffff0000,
@@ -843,6 +910,7 @@ struct cpu_spec	cpu_specs[] = {
 			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc405",
 	},
 
 #endif /* CONFIG_40x */
@@ -852,81 +920,90 @@ struct cpu_spec	cpu_specs[] = {
 		.pvr_value		= 0x40000850,
 		.cpu_name		= "440EP Rev. A",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= COMMON_USER, /* 440EP has an FPU */
+		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x400008d3,
 		.cpu_name		= "440EP Rev. B",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= COMMON_USER, /* 440EP has an FPU */
+		.cpu_user_features	= COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{	/* 440GP Rev. B */
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x40000440,
 		.cpu_name		= "440GP Rev. B",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440gp",
 	},
 	{	/* 440GP Rev. C */
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x40000481,
 		.cpu_name		= "440GP Rev. C",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440gp",
 	},
 	{ /* 440GX Rev. A */
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x50000850,
 		.cpu_name		= "440GX Rev. A",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{ /* 440GX Rev. B */
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x50000851,
 		.cpu_name		= "440GX Rev. B",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{ /* 440GX Rev. C */
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x50000892,
 		.cpu_name		= "440GX Rev. C",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{ /* 440GX Rev. F */
 		.pvr_mask		= 0xf0000fff,
 		.pvr_value		= 0x50000894,
 		.cpu_name		= "440GX Rev. F",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{ /* 440SP Rev. A */
 		.pvr_mask		= 0xff000fff,
 		.pvr_value		= 0x53000891,
 		.cpu_name		= "440SP Rev. A",
 		.cpu_features		= CPU_FTRS_44X,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 	{ /* 440SPe Rev. A */
 		.pvr_mask		= 0xff000fff,
@@ -934,9 +1011,10 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_name		= "440SPe Rev. A",
 		.cpu_features		= CPU_FTR_SPLIT_ID_CACHE |
 			CPU_FTR_USE_TB,
-		.cpu_user_features	= PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
+		.cpu_user_features	= COMMON_USER_BOOKE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "ppc440",
 	},
 #endif /* CONFIG_44x */
 #ifdef CONFIG_FSL_BOOKE
@@ -946,10 +1024,11 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_name		= "e200z5",
 		/* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
 		.cpu_features		= CPU_FTRS_E200,
-		.cpu_user_features	= PPC_FEATURE_32 |
-			PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_EFP_SINGLE |
+		.cpu_user_features	= COMMON_USER_BOOKE |
+			PPC_FEATURE_HAS_EFP_SINGLE |
 			PPC_FEATURE_UNIFIED_CACHE,
 		.dcache_bsize		= 32,
+		.platform		= "ppc5554",
 	},
 	{	/* e200z6 */
 		.pvr_mask		= 0xfff00000,
@@ -957,11 +1036,12 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_name		= "e200z6",
 		/* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
 		.cpu_features		= CPU_FTRS_E200,
-		.cpu_user_features	= PPC_FEATURE_32 |
-			PPC_FEATURE_HAS_MMU | PPC_FEATURE_SPE_COMP |
+		.cpu_user_features	= COMMON_USER_BOOKE |
+			PPC_FEATURE_SPE_COMP |
 			PPC_FEATURE_HAS_EFP_SINGLE |
 			PPC_FEATURE_UNIFIED_CACHE,
 		.dcache_bsize		= 32,
+		.platform		= "ppc5554",
 	},
 	{	/* e500 */
 		.pvr_mask		= 0xffff0000,
@@ -969,14 +1049,15 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_name		= "e500",
 		/* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
 		.cpu_features		= CPU_FTRS_E500,
-		.cpu_user_features	= PPC_FEATURE_32 |
-			PPC_FEATURE_HAS_MMU | PPC_FEATURE_SPE_COMP |
+		.cpu_user_features	= COMMON_USER_BOOKE |
+			PPC_FEATURE_SPE_COMP |
 			PPC_FEATURE_HAS_EFP_SINGLE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
 		.oprofile_cpu_type	= "ppc/e500",
 		.oprofile_type		= BOOKE,
+		.platform		= "ppc8540",
 	},
 	{	/* e500v2 */
 		.pvr_mask		= 0xffff0000,
@@ -984,14 +1065,16 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_name		= "e500v2",
 		/* xxx - galak: add CPU_FTR_MAYBE_CAN_DOZE */
 		.cpu_features		= CPU_FTRS_E500_2,
-		.cpu_user_features	= PPC_FEATURE_32 |
-			PPC_FEATURE_HAS_MMU | PPC_FEATURE_SPE_COMP |
-			PPC_FEATURE_HAS_EFP_SINGLE | PPC_FEATURE_HAS_EFP_DOUBLE,
+		.cpu_user_features	= COMMON_USER_BOOKE |
+			PPC_FEATURE_SPE_COMP |
+			PPC_FEATURE_HAS_EFP_SINGLE |
+			PPC_FEATURE_HAS_EFP_DOUBLE,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
 		.num_pmcs		= 4,
 		.oprofile_cpu_type	= "ppc/e500",
 		.oprofile_type		= BOOKE,
+		.platform		= "ppc8548",
 	},
 #endif
 #if !CLASSIC_PPC
@@ -1003,6 +1086,7 @@ struct cpu_spec	cpu_specs[] = {
 		.cpu_user_features	= PPC_FEATURE_32,
 		.icache_bsize		= 32,
 		.dcache_bsize		= 32,
+		.platform		= "powerpc",
 	}
 #endif /* !CLASSIC_PPC */
 #endif /* CONFIG_PPC32 */
diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h
index ef6ead34a773..03017d905704 100644
--- a/include/asm-powerpc/cputable.h
+++ b/include/asm-powerpc/cputable.h
@@ -19,6 +19,7 @@
 #define PPC_FEATURE_POWER5		0x00040000
 #define PPC_FEATURE_POWER5_PLUS		0x00020000
 #define PPC_FEATURE_CELL		0x00010000
+#define PPC_FEATURE_BOOKE		0x00008000
 
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
@@ -64,6 +65,9 @@ struct cpu_spec {
 
 	/* Processor specific oprofile operations */
 	enum powerpc_oprofile_type oprofile_type;
+
+	/* Name of processor class, for the ELF AT_PLATFORM entry */
+	char		*platform;
 };
 
 extern struct cpu_spec		*cur_cpu_spec;
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h
index 45f2af6f89c4..94d228f9c6ac 100644
--- a/include/asm-powerpc/elf.h
+++ b/include/asm-powerpc/elf.h
@@ -221,20 +221,18 @@ extern int dump_task_fpu(struct task_struct *, elf_fpregset_t *);
    instruction set this cpu supports.  This could be done in userspace,
    but it's not easy, and we've already done it here.  */
 # define ELF_HWCAP	(cur_cpu_spec->cpu_user_features)
-#ifdef __powerpc64__
-# define ELF_PLAT_INIT(_r, load_addr)	do {	\
-	_r->gpr[2] = load_addr; 		\
-} while (0)
-#endif /* __powerpc64__ */
 
 /* This yields a string that ld.so will use to load implementation
    specific libraries for optimization.  This is more specific in
-   intent than poking at uname or /proc/cpuinfo.
+   intent than poking at uname or /proc/cpuinfo.  */
 
-   For the moment, we have only optimizations for the Intel generations,
-   but that could change... */
+#define ELF_PLATFORM	(cur_cpu_spec->platform)
 
-#define ELF_PLATFORM	(NULL)
+#ifdef __powerpc64__
+# define ELF_PLAT_INIT(_r, load_addr)	do {	\
+	_r->gpr[2] = load_addr; 		\
+} while (0)
+#endif /* __powerpc64__ */
 
 #ifdef __KERNEL__