From 508514ed25315dd28340000831b17535d6f772da Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Mon, 3 Sep 2012 13:49:25 +0100 Subject: 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 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 arch/arm/include/asm/opcodes-virt.h (limited to '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 00000000000..b85665a96f8 --- /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 */ -- cgit v1.2.3 From b9a348cb12f3925a27fcf0a38a146b40978588d0 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 9 Aug 2012 10:43:29 +0100 Subject: ARM: opcodes: add __ERET/__MSR_ELR_HYP instruction encoding Enabling boot from HYP mode requires the use of some more virt-specific instructions ("eret" and "msr elr_hyp, reg"). Add the necessary encoding to asm/opcode-virt.h. Signed-off-by: Marc Zyngier --- arch/arm/include/asm/opcodes-virt.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to '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 index b85665a96f8..efcfdf92d9d 100644 --- a/arch/arm/include/asm/opcodes-virt.h +++ b/arch/arm/include/asm/opcodes-virt.h @@ -26,4 +26,14 @@ 0xF7E08000 | (((imm16) & 0xF000) << 4) | ((imm16) & 0x0FFF) \ ) +#define __ERET __inst_arm_thumb32( \ + 0xE160006E, \ + 0xF3DE8F00 \ +) + +#define __MSR_ELR_HYP(regnum) __inst_arm_thumb32( \ + 0xE12EF300 | regnum, \ + 0xF3808E30 | (regnum << 16) \ +) + #endif /* ! __ASM_ARM_OPCODES_VIRT_H */ -- cgit v1.2.3