From patchwork Tue Jul 15 06:25:02 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zi Shen Lim X-Patchwork-Id: 369851 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 5D63214008F for ; Tue, 15 Jul 2014 16:29:12 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757882AbaGOGZv (ORCPT ); Tue, 15 Jul 2014 02:25:51 -0400 Received: from mail-pd0-f169.google.com ([209.85.192.169]:50160 "EHLO mail-pd0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757801AbaGOGZg (ORCPT ); Tue, 15 Jul 2014 02:25:36 -0400 Received: by mail-pd0-f169.google.com with SMTP id y10so2206782pdj.28 for ; Mon, 14 Jul 2014 23:25:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=sbagyxKL0PRPP5aMIC0BHyV9ZqndS6roZuMwrxE9/jo=; b=FJQf7AF/wtE0NDesEbeYox9Jv/ASJC/T09X0BzzkUNzzMkZ5HAH0Gsiwy+JYtc8eSg +oOtnRJCUvBZVSi9Q00oa3S/u/T3YDtnIJHFiv6Tq5RhRcNFFDuilRBIOeZ4VG+AZt7b 8y91tXdCaLMs5K1Kpt1+o4BZCA/w0w62iQFbUYfWM0y/p1vgAA//ys/NhoihAfMjE3EH +X3Nw3ZYugv72OXuEA0Z4dcnh8fJ2ABc4hqtkev1Z8qmOHibArxBYVCKF7bX9SX8EISv YvEXohzbp+uDOyMsttfGUX3mVRPV87aJbuCyGOgX8EHsuvF28WJubXp9VEyaaB4Jnicj DCFA== X-Received: by 10.68.69.46 with SMTP id b14mr20855238pbu.70.1405405535792; Mon, 14 Jul 2014 23:25:35 -0700 (PDT) Received: from gup76.hsd1.ca.comcast.net ([98.234.176.204]) by mx.google.com with ESMTPSA id co3sm12773645pbb.89.2014.07.14.23.25.34 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 14 Jul 2014 23:25:35 -0700 (PDT) From: Zi Shen Lim To: Catalin Marinas , Will Deacon , Jiang Liu , AKASHI Takahiro , "David S. Miller" , Daniel Borkmann , Alexei Starovoitov Cc: Zi Shen Lim , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org Subject: [PATCH RFCv3 04/14] arm64: introduce aarch64_insn_gen_load_store_reg() Date: Mon, 14 Jul 2014 23:25:02 -0700 Message-Id: <1405405512-4423-5-git-send-email-zlim.lnx@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1405405512-4423-1-git-send-email-zlim.lnx@gmail.com> References: <1405405512-4423-1-git-send-email-zlim.lnx@gmail.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Introduce function to generate load/store (register offset) instructions. Signed-off-by: Zi Shen Lim --- arch/arm64/include/asm/insn.h | 20 ++++++++++++++ arch/arm64/kernel/insn.c | 62 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 82 insertions(+) diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h index 86a8a9c..5bc1cc3 100644 --- a/arch/arm64/include/asm/insn.h +++ b/arch/arm64/include/asm/insn.h @@ -72,6 +72,7 @@ enum aarch64_insn_imm_type { enum aarch64_insn_register_type { AARCH64_INSN_REGTYPE_RT, AARCH64_INSN_REGTYPE_RN, + AARCH64_INSN_REGTYPE_RM, }; enum aarch64_insn_register { @@ -143,12 +144,26 @@ enum aarch64_insn_branch_type { AARCH64_INSN_BRANCH_COMP_NONZERO, }; +enum aarch64_insn_size_type { + AARCH64_INSN_SIZE_8, + AARCH64_INSN_SIZE_16, + AARCH64_INSN_SIZE_32, + AARCH64_INSN_SIZE_64, +}; + +enum aarch64_insn_ldst_type { + AARCH64_INSN_LDST_LOAD_REG_OFFSET, + AARCH64_INSN_LDST_STORE_REG_OFFSET, +}; + #define __AARCH64_INSN_FUNCS(abbr, mask, val) \ static __always_inline bool aarch64_insn_is_##abbr(u32 code) \ { return (code & (mask)) == (val); } \ static __always_inline u32 aarch64_insn_get_##abbr##_value(void) \ { return (val); } +__AARCH64_INSN_FUNCS(str_reg, 0x3FE0EC00, 0x38206800) +__AARCH64_INSN_FUNCS(ldr_reg, 0x3FE0EC00, 0x38606800) __AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000) __AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000) __AARCH64_INSN_FUNCS(cbz, 0xFE000000, 0x34000000) @@ -184,6 +199,11 @@ u32 aarch64_insn_gen_hint(enum aarch64_insn_hint_op op); u32 aarch64_insn_gen_nop(void); u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg, enum aarch64_insn_branch_type type); +u32 aarch64_insn_gen_load_store_reg(enum aarch64_insn_register reg, + enum aarch64_insn_register base, + enum aarch64_insn_register offset, + enum aarch64_insn_size_type size, + enum aarch64_insn_ldst_type type); bool aarch64_insn_hotpatch_safe(u32 old_insn, u32 new_insn); diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index f2cf8ab..447ad63 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -284,6 +284,9 @@ static u32 aarch64_insn_encode_register(enum aarch64_insn_register_type type, case AARCH64_INSN_REGTYPE_RN: shift = 5; break; + case AARCH64_INSN_REGTYPE_RM: + shift = 16; + break; default: pr_err("%s: unknown register type encoding %d\n", __func__, type); @@ -296,6 +299,35 @@ static u32 aarch64_insn_encode_register(enum aarch64_insn_register_type type, return insn; } +static u32 aarch64_insn_encode_ldst_size(enum aarch64_insn_size_type type, + u32 insn) +{ + u32 size; + + switch (type) { + case AARCH64_INSN_SIZE_8: + size = 0; + break; + case AARCH64_INSN_SIZE_16: + size = 1; + break; + case AARCH64_INSN_SIZE_32: + size = 2; + break; + case AARCH64_INSN_SIZE_64: + size = 3; + break; + default: + pr_err("%s: unknown size encoding %d\n", __func__, type); + return 0; + } + + insn &= ~GENMASK(31, 30); + insn |= size << 30; + + return insn; +} + static inline long branch_imm_common(unsigned long pc, unsigned long addr, long range) { @@ -426,3 +458,33 @@ u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg, return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, reg); } + +u32 aarch64_insn_gen_load_store_reg(enum aarch64_insn_register reg, + enum aarch64_insn_register base, + enum aarch64_insn_register offset, + enum aarch64_insn_size_type size, + enum aarch64_insn_ldst_type type) +{ + u32 insn; + + switch (type) { + case AARCH64_INSN_LDST_LOAD_REG_OFFSET: + insn = aarch64_insn_get_ldr_reg_value(); + break; + case AARCH64_INSN_LDST_STORE_REG_OFFSET: + insn = aarch64_insn_get_str_reg_value(); + break; + default: + BUG_ON(1); + } + + insn = aarch64_insn_encode_ldst_size(size, insn); + + insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn, reg); + + insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, + base); + + return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, + offset); +}