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ARM: 7511/1: opcodes: Opcode definitions for the Virtualization Extensions

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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 <dave.martin@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dave Martin 2012-09-03 13:49:25 +01:00 committed by Russell King
parent a61a41a018
commit 508514ed25
2 changed files with 31 additions and 0 deletions
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29
arch/arm/include/asm/opcodes-virt.h Normal file
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@ -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 <asm/opcodes.h>
#define __HVC(imm16) __inst_arm_thumb32( \
0xE1400070 | (((imm16) & 0xFFF0) << 4) | ((imm16) & 0x000F), \
0xF7E08000 | (((imm16) & 0xF000) << 4) | ((imm16) & 0x0FFF) \
)
#endif /* ! __ASM_ARM_OPCODES_VIRT_H */

2
arch/arm/include/asm/opcodes.h
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@ -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 * specify the ARM and Thumb alternatives at the same time. This ensures
* that the correct opcode gets emitted depending on the instruction set * that the correct opcode gets emitted depending on the instruction set
* used for the kernel build. * used for the kernel build.
*
* Look at opcodes-virt.h for an example of how to use these macros.
*/ */
#include <linux/stringify.h> #include <linux/stringify.h>