diff options
Diffstat (limited to 'arch/arm/mach-renesas/lowlevel_init_gen3.S')
| -rw-r--r-- | arch/arm/mach-renesas/lowlevel_init_gen3.S | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/arm/mach-renesas/lowlevel_init_gen3.S b/arch/arm/mach-renesas/lowlevel_init_gen3.S new file mode 100644 index 0000000..0d77800 --- /dev/null +++ b/arch/arm/mach-renesas/lowlevel_init_gen3.S @@ -0,0 +1,103 @@ +/* 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) + +.pushsection .text.s_init, "ax" +WEAK(s_init) + ret +ENDPROC(s_init) +.popsection + +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, 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) |