mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
12833bacf5
This code calls cpu_resume() using a straight branch (b), so now that we have moved cpu_resume() back to .text, this should be moved there as well. Any direct references to symbols that will remain in the .data section are replaced with explicit PC-relative references. Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
133 lines
2.7 KiB
ArmAsm
133 lines
2.7 KiB
ArmAsm
/*
|
|
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* Exynos low-level resume code
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/hardware/cache-l2x0.h>
|
|
#include "smc.h"
|
|
|
|
#define CPU_MASK 0xff0ffff0
|
|
#define CPU_CORTEX_A9 0x410fc090
|
|
|
|
.text
|
|
.align
|
|
|
|
/*
|
|
* sleep magic, to allow the bootloader to check for an valid
|
|
* image to resume to. Must be the first word before the
|
|
* exynos_cpu_resume entry.
|
|
*/
|
|
|
|
.word 0x2bedf00d
|
|
|
|
/*
|
|
* exynos_cpu_resume
|
|
*
|
|
* resume code entry for bootloader to call
|
|
*/
|
|
|
|
ENTRY(exynos_cpu_resume)
|
|
#ifdef CONFIG_CACHE_L2X0
|
|
mrc p15, 0, r0, c0, c0, 0
|
|
ldr r1, =CPU_MASK
|
|
and r0, r0, r1
|
|
ldr r1, =CPU_CORTEX_A9
|
|
cmp r0, r1
|
|
bleq l2c310_early_resume
|
|
#endif
|
|
b cpu_resume
|
|
ENDPROC(exynos_cpu_resume)
|
|
|
|
.align
|
|
|
|
ENTRY(exynos_cpu_resume_ns)
|
|
mrc p15, 0, r0, c0, c0, 0
|
|
ldr r1, =CPU_MASK
|
|
and r0, r0, r1
|
|
ldr r1, =CPU_CORTEX_A9
|
|
cmp r0, r1
|
|
bne skip_cp15
|
|
|
|
adr r0, _cp15_save_power
|
|
ldr r1, [r0]
|
|
ldr r1, [r0, r1]
|
|
adr r0, _cp15_save_diag
|
|
ldr r2, [r0]
|
|
ldr r2, [r0, r2]
|
|
mov r0, #SMC_CMD_C15RESUME
|
|
dsb
|
|
smc #0
|
|
#ifdef CONFIG_CACHE_L2X0
|
|
adr r0, 1f
|
|
ldr r2, [r0]
|
|
add r0, r2, r0
|
|
|
|
/* Check that the address has been initialised. */
|
|
ldr r1, [r0, #L2X0_R_PHY_BASE]
|
|
teq r1, #0
|
|
beq skip_l2x0
|
|
|
|
/* Check if controller has been enabled. */
|
|
ldr r2, [r1, #L2X0_CTRL]
|
|
tst r2, #0x1
|
|
bne skip_l2x0
|
|
|
|
ldr r1, [r0, #L2X0_R_TAG_LATENCY]
|
|
ldr r2, [r0, #L2X0_R_DATA_LATENCY]
|
|
ldr r3, [r0, #L2X0_R_PREFETCH_CTRL]
|
|
mov r0, #SMC_CMD_L2X0SETUP1
|
|
smc #0
|
|
|
|
/* Reload saved regs pointer because smc corrupts registers. */
|
|
adr r0, 1f
|
|
ldr r2, [r0]
|
|
add r0, r2, r0
|
|
|
|
ldr r1, [r0, #L2X0_R_PWR_CTRL]
|
|
ldr r2, [r0, #L2X0_R_AUX_CTRL]
|
|
mov r0, #SMC_CMD_L2X0SETUP2
|
|
smc #0
|
|
|
|
mov r0, #SMC_CMD_L2X0INVALL
|
|
smc #0
|
|
|
|
mov r1, #1
|
|
mov r0, #SMC_CMD_L2X0CTRL
|
|
smc #0
|
|
skip_l2x0:
|
|
#endif /* CONFIG_CACHE_L2X0 */
|
|
skip_cp15:
|
|
b cpu_resume
|
|
ENDPROC(exynos_cpu_resume_ns)
|
|
|
|
.align
|
|
_cp15_save_power:
|
|
.long cp15_save_power - .
|
|
_cp15_save_diag:
|
|
.long cp15_save_diag - .
|
|
#ifdef CONFIG_CACHE_L2X0
|
|
1: .long l2x0_saved_regs - .
|
|
#endif /* CONFIG_CACHE_L2X0 */
|
|
|
|
.data
|
|
.globl cp15_save_diag
|
|
cp15_save_diag:
|
|
.long 0 @ cp15 diagnostic
|
|
.globl cp15_save_power
|
|
cp15_save_power:
|
|
.long 0 @ cp15 power control
|