mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 02:38:56 +00:00
4fa8375ffe
The ATF can pass additional information via the first four registers, x0...x3. The R-Car Gen3 with mainline ATF, register x1 contains pointer to a device tree with platform information. Save these registers for future use. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
97 lines
1.9 KiB
ArmAsm
97 lines
1.9 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* arch/arm/cpu/armv8/rcar_gen3/lowlevel_init.S
|
|
* This file is lowlevel initialize routine.
|
|
*
|
|
* (C) Copyright 2015 Renesas Electronics Corporation
|
|
*
|
|
* This file is based on the arch/arm/cpu/armv8/start.S
|
|
*
|
|
* (C) Copyright 2013
|
|
* David Feng <fenghua@phytium.com.cn>
|
|
*/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/macro.h>
|
|
|
|
.align 8
|
|
.globl rcar_atf_boot_args
|
|
rcar_atf_boot_args:
|
|
.dword 0
|
|
.dword 0
|
|
.dword 0
|
|
.dword 0
|
|
|
|
ENTRY(save_boot_params)
|
|
adr x8, rcar_atf_boot_args
|
|
stp x0, x1, [x8], #16
|
|
stp x2, x3, [x8], #16
|
|
b save_boot_params_ret
|
|
ENDPROC(save_boot_params)
|
|
|
|
ENTRY(lowlevel_init)
|
|
mov x29, lr /* Save LR */
|
|
|
|
#ifndef CONFIG_ARMV8_MULTIENTRY
|
|
/*
|
|
* For single-entry systems the lowlevel init is very simple.
|
|
*/
|
|
ldr x0, =GICD_BASE
|
|
bl gic_init_secure
|
|
|
|
#else /* CONFIG_ARMV8_MULTIENTRY is set */
|
|
|
|
#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
|
|
branch_if_slave x0, 1f
|
|
ldr x0, =GICD_BASE
|
|
bl gic_init_secure
|
|
1:
|
|
#if defined(CONFIG_GICV3)
|
|
ldr x0, =GICR_BASE
|
|
bl gic_init_secure_percpu
|
|
#elif defined(CONFIG_GICV2)
|
|
ldr x0, =GICD_BASE
|
|
ldr x1, =GICC_BASE
|
|
bl gic_init_secure_percpu
|
|
#endif
|
|
#endif
|
|
|
|
branch_if_master x0, x1, 2f
|
|
|
|
/*
|
|
* Slave should wait for master clearing spin table.
|
|
* This sync prevent salves observing incorrect
|
|
* value of spin table and jumping to wrong place.
|
|
*/
|
|
#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
|
|
#ifdef CONFIG_GICV2
|
|
ldr x0, =GICC_BASE
|
|
#endif
|
|
bl gic_wait_for_interrupt
|
|
#endif
|
|
|
|
/*
|
|
* All slaves will enter EL2 and optionally EL1.
|
|
*/
|
|
adr x4, lowlevel_in_el2
|
|
ldr x5, =ES_TO_AARCH64
|
|
bl armv8_switch_to_el2
|
|
|
|
lowlevel_in_el2:
|
|
#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
|
|
adr x4, lowlevel_in_el1
|
|
ldr x5, =ES_TO_AARCH64
|
|
bl armv8_switch_to_el1
|
|
|
|
lowlevel_in_el1:
|
|
#endif
|
|
#endif /* CONFIG_ARMV8_MULTIENTRY */
|
|
|
|
bl s_init
|
|
|
|
2:
|
|
mov lr, x29 /* Restore LR */
|
|
ret
|
|
ENDPROC(lowlevel_init)
|