From 905e1e763e0a8922cade359c01dfdee92834b473 Mon Sep 17 00:00:00 2001 From: Julius Werner Date: Mon, 25 Jun 2018 17:50:11 -0700 Subject: [PATCH] arm64: Drop dead file stage_entry.S This file has been dead since commit 7dcf9d51 (arm64: tegra132: tegra210: Remove old arm64/stage_entry.S), I just forgot to remove it. Change-Id: I0dd6666371036ecd42c1b256dbbe22a01ae959b8 Signed-off-by: Julius Werner Reviewed-on: https://review.coreboot.org/27236 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin Reviewed-by: Paul Menzel --- src/arch/arm64/stage_entry.S | 135 ----------------------------------- 1 file changed, 135 deletions(-) delete mode 100644 src/arch/arm64/stage_entry.S diff --git a/src/arch/arm64/stage_entry.S b/src/arch/arm64/stage_entry.S deleted file mode 100644 index 7aeabe6f2a..0000000000 --- a/src/arch/arm64/stage_entry.S +++ /dev/null @@ -1,135 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2014 Google Inc. - * - * 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; version 2 of the License. - * - * 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. - */ - -/* - * ======================== stage_entry.S ===================================== - * This file acts as an entry point to the different stages of arm64. They share - * the same process of setting up stacks and jumping to c code. It is important - * to save x25 from corruption as it contains the argument for rmodule. - * ============================================================================= - */ - -#include -#define __ASSEMBLY__ -#include - -#define STACK_SZ CONFIG_STACK_SIZE -#define EXCEPTION_STACK_SZ CONFIG_STACK_SIZE - -/* - * Stack for armv8 CPU grows down from _estack. Additionally, provide exception - * stack for the CPU. - */ -.section .bss, "aw", @nobits - -.global _stack -.global _estack -.balign STACK_SZ -_stack: -.space STACK_SZ -_estack: - -.global _stack_exceptions -.global _estack_exceptions -.balign EXCEPTION_STACK_SZ -_stack_exceptions: -.space EXCEPTION_STACK_SZ -_estack_exceptions: - -ENTRY(cpu_get_stack) - ldr x0, 1f - ret -.align 3 -1: - .quad _estack -ENDPROC(cpu_get_stack) - -ENTRY(cpu_get_exception_stack) - ldr x0, 1f - ret -.align 3 -1: - .quad _estack_exceptions -ENDPROC(cpu_get_exception_stack) - -/* - * Boot strap the processor into a C environemnt. That consists of providing - * 16-byte aligned stack. The programming enviroment uses SP_EL0 as its main - * stack while keeping SP_ELx reserved for exception entry. - */ -/* - * IMPORTANT: Ensure x25 is not corrupted because it saves the argument to - * any rmodules. - */ -ENTRY(arm64_c_environment) - /* Set the exception stack for the CPU. */ - bl cpu_get_exception_stack - msr SPSel, #1 - isb - mov sp, x0 - - /* Have stack pointer use SP_EL0. */ - msr SPSel, #0 - isb - - /* Set the non-exception stack for the CPU. */ - bl cpu_get_stack - mov sp, x0 - - /* Get entry point by dereferencing c_entry. */ - ldr x1, 1f - /* Move back the arguments from x25 to x0 */ - mov x0, x25 - br x1 -.align 3 - 1: - .quad c_entry -ENDPROC(arm64_c_environment) - -ENTRY(_start) - /* Save any arguments to current rmodule in x25 */ - mov x25, x0 - b arm64_c_environment -ENDPROC(_start) - -/* - * Setup SCTLR so that: - * Little endian mode is setup, XN is not enforced, MMU and caches are disabled. - * Alignment and stack alignment checks are disabled. - */ -.macro setup_sctlr - read_current x0, sctlr - bic x0, x0, #(1 << 25) /* Little Endian */ - bic x0, x0, #(1 << 19) /* XN not enforced */ - bic x0, x0, #(1 << 12) /* Disable Instruction Cache */ - bic x0, x0, #0xf /* Clear SA, C, A and M */ - write_current sctlr, x0, x1 -.endm - -CPU_RESET_ENTRY(arm64_cpu_startup) - bl arm64_cpu_early_setup - setup_sctlr - b arm64_c_environment -ENDPROC(arm64_cpu_startup) - -/* - * stage_entry is defined as a weak symbol to allow SoCs/CPUs to define a custom - * entry point to perform any fixups that need to be done immediately after - * power on reset. In case SoC/CPU does not need any custom-defined entrypoint, - * this weak symbol can be used to jump directly to arm64_cpu_startup. - */ -ENTRY_WEAK(stage_entry) - b arm64_cpu_startup -ENDPROC(stage_entry)