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| author | Jimi Xenidis <jimix@pobox.com> | 2011-09-29 10:55:13 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-11-25 14:11:28 +1100 |
| commit | fac26ad4f9cb794c9d1032f55f40a31cb55be09a (patch) | |
| tree | 6acb31ab3fbc959de6f62aa4dd6ea08c004205f4 | |
| parent | 9d670280908013004f173b2b86414d9b6918511b (diff) | |
| download | linux-3.10-fac26ad4f9cb794c9d1032f55f40a31cb55be09a.tar.gz linux-3.10-fac26ad4f9cb794c9d1032f55f40a31cb55be09a.tar.bz2 linux-3.10-fac26ad4f9cb794c9d1032f55f40a31cb55be09a.zip | |
powerpc/book3e: Add ICSWX/ACOP support to Book3e cores like A2
ICSWX is also used by the A2 processor to access coprocessors,
although not all "chips" that contain A2s have coprocessors.
Signed-off-by: Jimi Xenidis <jimix@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/include/asm/cputable.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/mmu-book3e.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/reg_booke.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/cpu_setup_a2.S | 10 | ||||
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/wsp/Kconfig | 1 |
6 files changed, 19 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index e30442c539c..7044233124b 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -437,7 +437,7 @@ extern const char *powerpc_base_platform; #define CPU_FTRS_COMPATIBLE (CPU_FTR_USE_TB | CPU_FTR_PPCAS_ARCH_V2) #define CPU_FTRS_A2 (CPU_FTR_USE_TB | CPU_FTR_SMT | CPU_FTR_DBELL | \ - CPU_FTR_NOEXECUTE | CPU_FTR_NODSISRALIGN) + CPU_FTR_NOEXECUTE | CPU_FTR_NODSISRALIGN | CPU_FTR_ICSWX) #ifdef __powerpc64__ #ifdef CONFIG_PPC_BOOK3E diff --git a/arch/powerpc/include/asm/mmu-book3e.h b/arch/powerpc/include/asm/mmu-book3e.h index 0260ea5ec3c..50210b9b014 100644 --- a/arch/powerpc/include/asm/mmu-book3e.h +++ b/arch/powerpc/include/asm/mmu-book3e.h @@ -214,6 +214,10 @@ typedef struct { unsigned int id; unsigned int active; unsigned long vdso_base; +#ifdef CONFIG_PPC_ICSWX + struct spinlock *cop_lockp; /* guard cop related stuff */ + unsigned long acop; /* mask of enabled coprocessor types */ +#endif /* CONFIG_PPC_ICSWX */ #ifdef CONFIG_PPC_MM_SLICES u64 low_slices_psize; /* SLB page size encodings */ u64 high_slices_psize; /* 4 bits per slice for now */ diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h index 03c48e819c8..500fe1dc43e 100644 --- a/arch/powerpc/include/asm/reg_booke.h +++ b/arch/powerpc/include/asm/reg_booke.h @@ -187,6 +187,10 @@ #define SPRN_CSRR1 SPRN_SRR3 /* Critical Save and Restore Register 1 */ #endif +#ifdef CONFIG_PPC_ICSWX +#define SPRN_HACOP 0x15F /* Hypervisor Available Coprocessor Register */ +#endif + /* Bit definitions for CCR1. */ #define CCR1_DPC 0x00000100 /* Disable L1 I-Cache/D-Cache parity checking */ #define CCR1_TCS 0x00000080 /* Timer Clock Select */ diff --git a/arch/powerpc/kernel/cpu_setup_a2.S b/arch/powerpc/kernel/cpu_setup_a2.S index 7f818feaa7a..ebc62f42a23 100644 --- a/arch/powerpc/kernel/cpu_setup_a2.S +++ b/arch/powerpc/kernel/cpu_setup_a2.S @@ -41,11 +41,16 @@ _GLOBAL(__setup_cpu_a2) * core local but doing it always won't hurt */ -#ifdef CONFIG_PPC_WSP_COPRO +#ifdef CONFIG_PPC_ICSWX /* Make sure ACOP starts out as zero */ li r3,0 mtspr SPRN_ACOP,r3 + /* Skip the following if we are in Guest mode */ + mfmsr r3 + andis. r0,r3,MSR_GS@h + bne _icswx_skip_guest + /* Enable icswx instruction */ mfspr r3,SPRN_A2_CCR2 ori r3,r3,A2_CCR2_ENABLE_ICSWX @@ -54,7 +59,8 @@ _GLOBAL(__setup_cpu_a2) /* Unmask all CTs in HACOP */ li r3,-1 mtspr SPRN_HACOP,r3 -#endif /* CONFIG_PPC_WSP_COPRO */ +_icswx_skip_guest: +#endif /* CONFIG_PPC_ICSWX */ /* Enable doorbell */ mfspr r3,SPRN_A2_CCR2 diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index a67105aeeda..46d2a7c77dc 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -236,7 +236,7 @@ config VSX config PPC_ICSWX bool "Support for PowerPC icswx coprocessor instruction" - depends on POWER4 + depends on POWER4 || PPC_A2 default n ---help--- diff --git a/arch/powerpc/platforms/wsp/Kconfig b/arch/powerpc/platforms/wsp/Kconfig index bd560c786ed..43a3b00261e 100644 --- a/arch/powerpc/platforms/wsp/Kconfig +++ b/arch/powerpc/platforms/wsp/Kconfig @@ -1,6 +1,7 @@ config PPC_WSP bool select PPC_A2 + select PPC_ICSWX select PPC_SCOM select PPC_XICS select PPC_ICP_NATIVE |