Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753075Ab3JBAPz (ORCPT ); Tue, 1 Oct 2013 20:15:55 -0400 Received: from e38.co.us.ibm.com ([32.97.110.159]:50004 "EHLO e38.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752568Ab3JBAPd (ORCPT ); Tue, 1 Oct 2013 20:15:33 -0400 From: Sukadev Bhattiprolu To: Arnaldo Carvalho de Melo Cc: , linuxppc-dev@ozlabs.org, Stephane Eranian , Michael Ellerman , Paul Mackerras , Anshuman Khandual Subject: [PATCH 5/9][v5] powerpc: implement is_instr_load_store(). Date: Tue, 1 Oct 2013 17:15:06 -0700 Message-Id: <1380672911-12812-6-git-send-email-sukadev@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1380672911-12812-1-git-send-email-sukadev@linux.vnet.ibm.com> References: <1380672911-12812-1-git-send-email-sukadev@linux.vnet.ibm.com> X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13100200-1344-0000-0000-0000021574D9 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3931 Lines: 133 Implement is_instr_load_store() to detect whether a given instruction is one of the fixed-point or floating-point load/store instructions. This function will be used in a follow-on patch to save memory hierarchy information of the load/store. Signed-off-by: Sukadev Bhattiprolu Reviewed-by: Anshuman Khandual --- arch/powerpc/include/asm/code-patching.h | 1 + arch/powerpc/lib/code-patching.c | 90 ++++++++++++++++++++++++++++++ 2 files changed, 91 insertions(+) diff --git a/arch/powerpc/include/asm/code-patching.h b/arch/powerpc/include/asm/code-patching.h index a6f8c7a..3e47fe0 100644 --- a/arch/powerpc/include/asm/code-patching.h +++ b/arch/powerpc/include/asm/code-patching.h @@ -34,6 +34,7 @@ int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr); unsigned long branch_target(const unsigned int *instr); unsigned int translate_branch(const unsigned int *dest, const unsigned int *src); +int instr_is_load_store(const unsigned int *instr); static inline unsigned long ppc_function_entry(void *func) { diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c index 2bc9db3..7e5dc6f 100644 --- a/arch/powerpc/lib/code-patching.c +++ b/arch/powerpc/lib/code-patching.c @@ -159,6 +159,96 @@ unsigned int translate_branch(const unsigned int *dest, const unsigned int *src) return 0; } +static unsigned int load_store_xval(const unsigned int instr) +{ + return (instr >> 1) & 0x3FF; /* bits 21..30 */ +} + +/* + * Values of bits 21:30 of Fixed-point and Floating-point Load and Store + * instructions. + * + * Reference: PowerISA_V2.06B_Public.pdf, Sections 3.3.2 through 3.3.6 and + * 4.6.2 through 4.6.4. + */ +#define x_lbzx 87 +#define x_lbzux 119 +#define x_lhzx 279 +#define x_lhzux 311 +#define x_lhax 343 +#define x_lhaux 375 +#define x_lwzx 23 +#define x_lwzux 55 +#define x_lwax 341 +#define x_lwaux 373 +#define x_ldx 21 +#define x_ldux 53 +#define x_stbx 215 +#define x_stbux 247 +#define x_sthx 407 +#define x_sthux 439 +#define x_stwx 151 +#define x_stwux 183 +#define x_stdx 149 +#define x_stdux 181 +#define x_lhbrx 790 +#define x_lwbrx 534 +#define x_sthbrx 918 +#define x_stwbrx 662 +#define x_ldbrx 532 +#define x_stdbrx 660 +#define x_lswi 597 +#define x_lswx 533 +#define x_stswi 725 +#define x_stswx 661 +#define x_lfsx 535 +#define x_lfsux 567 +#define x_lfdx 599 +#define x_lfdux 631 +#define x_lfiwax 855 +#define x_lfiwzx 887 +#define x_stfsx 663 +#define x_stfsux 695 +#define x_stfdx 727 +#define x_stfdux 759 +#define x_stfiwax 983 +#define x_lfdpx 791 +#define x_stfdpx 919 + +static unsigned int x_form_load_store[] = { + x_lbzx, x_lbzux, x_lhzx, x_lhzux, x_lhax, + x_lhaux, x_lwzx, x_lwzux, x_lwax, x_lwaux, + x_ldx, x_ldux, x_stbx, x_stbux, x_sthx, + x_sthux, x_stwx, x_stwux, x_stdx, x_stdux, + x_lhbrx, x_lwbrx, x_sthbrx, x_stwbrx, x_ldbrx, + x_stdbrx, x_lswi, x_lswx, x_stswi, x_stswx, + x_lfsx, x_lfsux, x_lfdx, x_lfdux, x_lfiwax, + x_lfiwzx, x_stfsx, x_stfsux, x_stfdx, x_stfdux, + x_stfiwax, x_lfdpx, x_stfdpx +}; + +int instr_is_load_store(const unsigned int *instr) +{ + unsigned int op; + int i, n; + + op = instr_opcode(*instr); + + if ((op >= 32 && op <= 58) || (op == 61 || op == 62)) + return 1; + + if (op == 31) { + n = sizeof(x_form_load_store) / sizeof(int); + + for (i = 0; i < n; i++) { + if (x_form_load_store[i] == load_store_xval(*instr)) + return 1; + } + } + + return 0; +} + #ifdef CONFIG_CODE_PATCHING_SELFTEST -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/