trusty-fiq-arm64-glue.S
1.62 KB
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/*
* Copyright (C) 2013 Google, Inc.
*
* 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 <asm/asm-offsets.h>
#include <asm/ptrace.h>
#include <linux/linkage.h>
#include <linux/trusty/smcall.h>
.macro push reg1,reg2,remregs:vararg
.ifnb \remregs
push \remregs
.endif
stp \reg1, \reg2, [sp, #-16]!
.endm
.macro pop reg1,reg2,remregs:vararg
ldp \reg1, \reg2, [sp], #16
.ifnb \remregs
pop \remregs
.endif
.endm
ENTRY(trusty_fiq_glue_arm64)
sub sp, sp, #S_FRAME_SIZE - S_LR
push x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, \
x14, x15, x16, x17, x18, x19, x20, x21, x22, x23, x24, x25, \
x26, x27, x28, x29
ldr x0, =SMC_FC64_GET_FIQ_REGS
smc #0
stp x0, x1, [sp, #S_PC] /* original pc, cpsr */
tst x1, PSR_MODE_MASK
csel x2, x2, x3, eq /* sp el0, sp el1 */
stp x30, x2, [sp, #S_LR] /* lr, original sp */
mov x0, sp
mov x1, x3
bl trusty_fiq_handler
pop x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, \
x14, x15, x16, x17, x18, x19, x20, x21, x22, x23, x24, x25, \
x26, x27, x28, x29
ldr x30, [sp], #S_FRAME_SIZE - S_LR /* load LR and restore SP */
ldr x0, =SMC_FC_FIQ_EXIT
smc #0
b . /* should not get here */
ENTRY(trusty_fiq_cpu_resume)
ldr x0, =SMC_FC_FIQ_RESUME
smc #0
ret