mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
c20611df13
This patch makes it possible to enter zImage in Thumb mode for ARMv7-M (Cortex-M) CPUs that do not support ARM mode. The kernel entry is also made in Thumb mode. [ukl: fix spelling in commit log, return early in call_cache_fn] Signed-off-by: Joachim Eastwood <manabian@gmail.com> Tested-by: Stefan Agner <stefan@agner.ch> Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
143 lines
2.8 KiB
C
143 lines
2.8 KiB
C
/*
|
|
* include/asm-arm/unified.h - Unified Assembler Syntax helper macros
|
|
*
|
|
* Copyright (C) 2008 ARM Limited
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __ASM_UNIFIED_H
|
|
#define __ASM_UNIFIED_H
|
|
|
|
#if defined(__ASSEMBLY__) && defined(CONFIG_ARM_ASM_UNIFIED)
|
|
.syntax unified
|
|
#endif
|
|
|
|
#ifdef CONFIG_CPU_V7M
|
|
#define AR_CLASS(x...)
|
|
#define M_CLASS(x...) x
|
|
#else
|
|
#define AR_CLASS(x...) x
|
|
#define M_CLASS(x...)
|
|
#endif
|
|
|
|
#ifdef CONFIG_THUMB2_KERNEL
|
|
|
|
#if __GNUC__ < 4
|
|
#error Thumb-2 kernel requires gcc >= 4
|
|
#endif
|
|
|
|
/* The CPSR bit describing the instruction set (Thumb) */
|
|
#define PSR_ISETSTATE PSR_T_BIT
|
|
|
|
#define ARM(x...)
|
|
#define THUMB(x...) x
|
|
#ifdef __ASSEMBLY__
|
|
#define W(instr) instr.w
|
|
#define BSYM(sym) sym + 1
|
|
#else
|
|
#define WASM(instr) #instr ".w"
|
|
#endif
|
|
|
|
#else /* !CONFIG_THUMB2_KERNEL */
|
|
|
|
/* The CPSR bit describing the instruction set (ARM) */
|
|
#define PSR_ISETSTATE 0
|
|
|
|
#define ARM(x...) x
|
|
#define THUMB(x...)
|
|
#ifdef __ASSEMBLY__
|
|
#define W(instr) instr
|
|
#define BSYM(sym) sym
|
|
#else
|
|
#define WASM(instr) #instr
|
|
#endif
|
|
|
|
#endif /* CONFIG_THUMB2_KERNEL */
|
|
|
|
#ifndef CONFIG_ARM_ASM_UNIFIED
|
|
|
|
/*
|
|
* If the unified assembly syntax isn't used (in ARM mode), these
|
|
* macros expand to an empty string
|
|
*/
|
|
#ifdef __ASSEMBLY__
|
|
.macro it, cond
|
|
.endm
|
|
.macro itt, cond
|
|
.endm
|
|
.macro ite, cond
|
|
.endm
|
|
.macro ittt, cond
|
|
.endm
|
|
.macro itte, cond
|
|
.endm
|
|
.macro itet, cond
|
|
.endm
|
|
.macro itee, cond
|
|
.endm
|
|
.macro itttt, cond
|
|
.endm
|
|
.macro ittte, cond
|
|
.endm
|
|
.macro ittet, cond
|
|
.endm
|
|
.macro ittee, cond
|
|
.endm
|
|
.macro itett, cond
|
|
.endm
|
|
.macro itete, cond
|
|
.endm
|
|
.macro iteet, cond
|
|
.endm
|
|
.macro iteee, cond
|
|
.endm
|
|
#else /* !__ASSEMBLY__ */
|
|
__asm__(
|
|
" .macro it, cond\n"
|
|
" .endm\n"
|
|
" .macro itt, cond\n"
|
|
" .endm\n"
|
|
" .macro ite, cond\n"
|
|
" .endm\n"
|
|
" .macro ittt, cond\n"
|
|
" .endm\n"
|
|
" .macro itte, cond\n"
|
|
" .endm\n"
|
|
" .macro itet, cond\n"
|
|
" .endm\n"
|
|
" .macro itee, cond\n"
|
|
" .endm\n"
|
|
" .macro itttt, cond\n"
|
|
" .endm\n"
|
|
" .macro ittte, cond\n"
|
|
" .endm\n"
|
|
" .macro ittet, cond\n"
|
|
" .endm\n"
|
|
" .macro ittee, cond\n"
|
|
" .endm\n"
|
|
" .macro itett, cond\n"
|
|
" .endm\n"
|
|
" .macro itete, cond\n"
|
|
" .endm\n"
|
|
" .macro iteet, cond\n"
|
|
" .endm\n"
|
|
" .macro iteee, cond\n"
|
|
" .endm\n");
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* CONFIG_ARM_ASM_UNIFIED */
|
|
|
|
#endif /* !__ASM_UNIFIED_H */
|