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authorPaul Mackerras <paulus@samba.org>2006-11-10 04:38:53 -0500
committerPaul Mackerras <paulus@samba.org>2006-12-04 04:40:16 -0500
commit974a76f51355d22f4f63d83d6bb1ccecd019ec58 (patch)
tree9a6c5745d8e1f592427d96fbf64d8546af4feb39 /arch/ppc/kernel
parent18f2190d796198fbb5d4bc4c87511acf3ced7d47 (diff)
[POWERPC] Distinguish POWER6 partition modes and tell userspace
This adds code to look at the properties firmware puts in the device tree to determine what compatibility mode the partition is in on POWER6 machines, and set the ELF aux vector AT_HWCAP and AT_PLATFORM entries appropriately. Specifically, we look at the cpu-version property in the cpu node(s). If that contains a "logical" PVR value (of the form 0x0f00000x), we call identify_cpu again with this PVR value. A value of 0x0f000001 indicates the partition is in POWER5+ compatibility mode, and a value of 0x0f000002 indicates "POWER6 architected" mode, with various extensions disabled. We also look for various other properties: ibm,dfp, ibm,purr and ibm,spurr. Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc/kernel')
-rw-r--r--arch/ppc/kernel/setup.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index 27faeca2c7a2..3c506af19880 100644
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -313,7 +313,7 @@ early_init(int r3, int r4, int r5)
313 * Identify the CPU type and fix up code sections 313 * Identify the CPU type and fix up code sections
314 * that depend on which cpu we have. 314 * that depend on which cpu we have.
315 */ 315 */
316 spec = identify_cpu(offset); 316 spec = identify_cpu(offset, mfspr(SPRN_PVR));
317 do_feature_fixups(spec->cpu_features, 317 do_feature_fixups(spec->cpu_features,
318 PTRRELOC(&__start___ftr_fixup), 318 PTRRELOC(&__start___ftr_fixup),
319 PTRRELOC(&__stop___ftr_fixup)); 319 PTRRELOC(&__stop___ftr_fixup));