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[PATCH] ppc64: Fix runlatch code to work on pseries machines

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Not all ppc64 CPUs have the CTRL SPR, so we need a cputable feature for it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Anton Blanchard
2005-07-07 17:56:11 -07:00
committed by Linus Torvalds
parent 315a699851
commit a2f7a9ce2a
3 changed files with 17 additions and 11 deletions
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include/asm-ppc64/cputable.h
+2 -1
View File
@@ -138,6 +138,7 @@ extern firmware_feature_t firmware_features_table[];
#define CPU_FTR_COHERENT_ICACHE ASM_CONST(0x0000020000000000)
#define CPU_FTR_LOCKLESS_TLBIE ASM_CONST(0x0000040000000000)
#define CPU_FTR_MMCRA_SIHV ASM_CONST(0x0000080000000000)
#define CPU_FTR_CTRL ASM_CONST(0x0000100000000000)
/* Platform firmware features */
#define FW_FTR_ ASM_CONST(0x0000000000000001)
@@ -148,7 +149,7 @@ extern firmware_feature_t firmware_features_table[];
#define CPU_FTR_PPCAS_ARCH_V2_BASE (CPU_FTR_SLB | \
CPU_FTR_TLBIEL | CPU_FTR_NOEXECUTE | \
CPU_FTR_NODSISRALIGN)
CPU_FTR_NODSISRALIGN | CPU_FTR_CTRL)
/* iSeries doesn't support large pages */
#ifdef CONFIG_PPC_ISERIES
include/asm-ppc64/processor.h
+11 -6
View File
@@ -20,6 +20,7 @@
#include <asm/ptrace.h>
#include <asm/types.h>
#include <asm/systemcfg.h>
#include <asm/cputable.h>
/* Machine State Register (MSR) Fields */
#define MSR_SF_LG 63 /* Enable 64 bit mode */
@@ -501,18 +502,22 @@ static inline void ppc64_runlatch_on(void)
{
unsigned long ctrl;
ctrl = mfspr(SPRN_CTRLF);
ctrl |= CTRL_RUNLATCH;
mtspr(SPRN_CTRLT, ctrl);
if (cpu_has_feature(CPU_FTR_CTRL)) {
ctrl = mfspr(SPRN_CTRLF);
ctrl |= CTRL_RUNLATCH;
mtspr(SPRN_CTRLT, ctrl);
}
}
static inline void ppc64_runlatch_off(void)
{
unsigned long ctrl;
ctrl = mfspr(SPRN_CTRLF);
ctrl &= ~CTRL_RUNLATCH;
mtspr(SPRN_CTRLT, ctrl);
if (cpu_has_feature(CPU_FTR_CTRL)) {
ctrl = mfspr(SPRN_CTRLF);
ctrl &= ~CTRL_RUNLATCH;
mtspr(SPRN_CTRLT, ctrl);
}
}
#endif /* __KERNEL__ */