mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
b329f95d70
Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC for architectures that may support arm-smccc. It's the responsibility of the caller to know if the SMC instruction is supported by the platform. Reviewed-by: Lars Persson <lars.persson@axis.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
63 lines
1.5 KiB
ArmAsm
63 lines
1.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2015, Linaro Limited
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/opcodes-sec.h>
|
|
#include <asm/opcodes-virt.h>
|
|
#include <asm/unwind.h>
|
|
|
|
/*
|
|
* Wrap c macros in asm macros to delay expansion until after the
|
|
* SMCCC asm macro is expanded.
|
|
*/
|
|
.macro SMCCC_SMC
|
|
__SMC(0)
|
|
.endm
|
|
|
|
.macro SMCCC_HVC
|
|
__HVC(0)
|
|
.endm
|
|
|
|
.macro SMCCC instr
|
|
UNWIND( .fnstart)
|
|
mov r12, sp
|
|
push {r4-r7}
|
|
UNWIND( .save {r4-r7})
|
|
ldm r12, {r4-r7}
|
|
\instr
|
|
pop {r4-r7}
|
|
ldr r12, [sp, #(4 * 4)]
|
|
stm r12, {r0-r3}
|
|
bx lr
|
|
UNWIND( .fnend)
|
|
.endm
|
|
|
|
/*
|
|
* void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
|
|
* unsigned long a3, unsigned long a4, unsigned long a5,
|
|
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res)
|
|
*/
|
|
ENTRY(arm_smccc_smc)
|
|
SMCCC SMCCC_SMC
|
|
ENDPROC(arm_smccc_smc)
|
|
|
|
/*
|
|
* void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
|
|
* unsigned long a3, unsigned long a4, unsigned long a5,
|
|
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res)
|
|
*/
|
|
ENTRY(arm_smccc_hvc)
|
|
SMCCC SMCCC_HVC
|
|
ENDPROC(arm_smccc_hvc)
|