From 806d05c0c3bbc77c3a9ea3463e3fc49a5f6ab800 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Mon, 3 Sep 2012 13:49:25 +0100 Subject: [PATCH] ARM: 7511/1: opcodes: Opcode definitions for the Virtualization Extensions For now, this patch just adds a definition for the HVC instruction. More can be added here later, as needed. Now that we have a real example of how to use the opcode injection macros properly, this patch also adds a cross-reference from the explanation in opcodes.h (since without an example, figuring out how to use the macros is not that easy). Signed-off-by: Dave Martin Acked-by: Nicolas Pitre Signed-off-by: Russell King --- arch/arm/include/asm/opcodes-virt.h | 29 +++++++++++++++++++++++++++++ arch/arm/include/asm/opcodes.h | 2 ++ 2 files changed, 31 insertions(+) create mode 100644 arch/arm/include/asm/opcodes-virt.h diff --git a/arch/arm/include/asm/opcodes-virt.h b/arch/arm/include/asm/opcodes-virt.h new file mode 100644 index 000000000000..b85665a96f8e --- /dev/null +++ b/arch/arm/include/asm/opcodes-virt.h @@ -0,0 +1,29 @@ +/* + * opcodes-virt.h: Opcode definitions for the ARM virtualization extensions + * Copyright (C) 2012 Linaro Limited + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#ifndef __ASM_ARM_OPCODES_VIRT_H +#define __ASM_ARM_OPCODES_VIRT_H + +#include + +#define __HVC(imm16) __inst_arm_thumb32( \ + 0xE1400070 | (((imm16) & 0xFFF0) << 4) | ((imm16) & 0x000F), \ + 0xF7E08000 | (((imm16) & 0xF000) << 4) | ((imm16) & 0x0FFF) \ +) + +#endif /* ! __ASM_ARM_OPCODES_VIRT_H */ diff --git a/arch/arm/include/asm/opcodes.h b/arch/arm/include/asm/opcodes.h index f7937e1c46bf..74e211a6fb24 100644 --- a/arch/arm/include/asm/opcodes.h +++ b/arch/arm/include/asm/opcodes.h @@ -193,6 +193,8 @@ extern asmlinkage unsigned int arm_check_condition(u32 opcode, u32 psr); * specify the ARM and Thumb alternatives at the same time. This ensures * that the correct opcode gets emitted depending on the instruction set * used for the kernel build. + * + * Look at opcodes-virt.h for an example of how to use these macros. */ #include -- 2.39.5