From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pz0-f46.google.com (mail-pz0-f46.google.com [209.85.210.46]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 87BD7B722A for ; Tue, 9 Aug 2011 08:10:23 +1000 (EST) Received: by mail-pz0-f46.google.com with SMTP id 32so5053812pzk.33 for ; Mon, 08 Aug 2011 15:10:23 -0700 (PDT) Sender: "xenidis@gmail.com" From: Jimi Xenidis To: linuxppc-dev Subject: [PATCH 2/3] powerpc: book3e: Add ICSWX/ACOP support to Book3e cores like A2 Date: Mon, 8 Aug 2011 17:26:47 -0500 Message-Id: <1312842408-21482-3-git-send-email-jimix@pobox.com> In-Reply-To: <1312842408-21482-1-git-send-email-jimix@pobox.com> References: <1312842408-21482-1-git-send-email-jimix@pobox.com> Cc: Ian Munsie , Anton Blanchard List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- arch/powerpc/include/asm/cputable.h | 2 +- arch/powerpc/include/asm/mmu-book3e.h | 4 ++++ arch/powerpc/include/asm/reg_booke.h | 4 ++++ arch/powerpc/kernel/cpu_setup_a2.S | 10 ++++++++-- arch/powerpc/platforms/wsp/Kconfig | 1 + 5 files changed, 18 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index e30442c..7044233 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 3ea0f9a..06d7f91 100644 --- a/arch/powerpc/include/asm/mmu-book3e.h +++ b/arch/powerpc/include/asm/mmu-book3e.h @@ -212,6 +212,10 @@ typedef struct { unsigned int id; unsigned int active; unsigned long vdso_base; +#ifdef CONFIG_PPC_ICSWX + struct spinlock *cop_lockp; /* guard acop and cop_pid */ + unsigned long acop; /* mask of enabled coprocessor types */ +#endif /* CONFIG_PPC_ICSWX */ } mm_context_t; /* Page size definitions, common between 32 and 64-bit diff --git a/arch/powerpc/include/asm/reg_booke.h b/arch/powerpc/include/asm/reg_booke.h index 9ec0b39..e927049 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 7f818fe..ebc62f4 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/wsp/Kconfig b/arch/powerpc/platforms/wsp/Kconfig index d051581..3540293 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 -- 1.7.0.4