diff options
Diffstat (limited to 'qemu/roms/u-boot/arch/arm/cpu/arm1176/start.S')
| -rw-r--r-- | qemu/roms/u-boot/arch/arm/cpu/arm1176/start.S | 331 |
1 files changed, 0 insertions, 331 deletions
diff --git a/qemu/roms/u-boot/arch/arm/cpu/arm1176/start.S b/qemu/roms/u-boot/arch/arm/cpu/arm1176/start.S deleted file mode 100644 index ce620115d..000000000 --- a/qemu/roms/u-boot/arch/arm/cpu/arm1176/start.S +++ /dev/null @@ -1,331 +0,0 @@ -/* - * armboot - Startup Code for ARM1176 CPU-core - * - * Copyright (c) 2007 Samsung Electronics - * - * Copyright (C) 2008 - * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.de> - * - * SPDX-License-Identifier: GPL-2.0+ - * - * 2007-09-21 - Restructured codes by jsgood (jsgood.yang@samsung.com) - * 2007-09-21 - Added MoviNAND and OneNAND boot codes by - * jsgood (jsgood.yang@samsung.com) - * Base codes by scsuh (sc.suh) - */ - -#include <asm-offsets.h> -#include <config.h> -#include <version.h> - -#ifndef CONFIG_SYS_PHY_UBOOT_BASE -#define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE -#endif - -/* - ************************************************************************* - * - * Jump vector table as in table 3.1 in [1] - * - ************************************************************************* - */ - -.globl _start -_start: b reset -#ifndef CONFIG_SPL_BUILD - ldr pc, _undefined_instruction - ldr pc, _software_interrupt - ldr pc, _prefetch_abort - ldr pc, _data_abort - ldr pc, _not_used - ldr pc, _irq - ldr pc, _fiq - -_undefined_instruction: - .word undefined_instruction -_software_interrupt: - .word software_interrupt -_prefetch_abort: - .word prefetch_abort -_data_abort: - .word data_abort -_not_used: - .word not_used -_irq: - .word irq -_fiq: - .word fiq -_pad: - .word 0x12345678 /* now 16*4=64 */ -#else - . = _start + 64 -#endif - -.global _end_vect -_end_vect: - .balignl 16,0xdeadbeef -/* - ************************************************************************* - * - * Startup Code (reset vector) - * - * do important init only if we don't start from memory! - * setup Memory and board specific bits prior to relocation. - * relocate armboot to ram - * setup stack - * - ************************************************************************* - */ - -/* IRQ stack memory (calculated at run-time) + 8 bytes */ -.globl IRQ_STACK_START_IN -IRQ_STACK_START_IN: - .word 0x0badc0de - -/* - * the actual reset code - */ - -reset: - /* - * set the cpu to SVC32 mode - */ - mrs r0, cpsr - bic r0, r0, #0x3f - orr r0, r0, #0xd3 - msr cpsr, r0 - -/* - ************************************************************************* - * - * CPU_init_critical registers - * - * setup important registers - * setup memory timing - * - ************************************************************************* - */ - /* - * we do sys-critical inits only at reboot, - * not when booting from ram! - */ -cpu_init_crit: - /* - * When booting from NAND - it has definitely been a reset, so, no need - * to flush caches and disable the MMU - */ -#ifndef CONFIG_SPL_BUILD - /* - * flush v4 I/D caches - */ - mov r0, #0 - mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */ - mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */ - - /* - * disable MMU stuff and caches - */ - mrc p15, 0, r0, c1, c0, 0 - bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS) - bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM) - orr r0, r0, #0x00000002 @ set bit 2 (A) Align - orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache - - /* Prepare to disable the MMU */ - adr r2, mmu_disable_phys - sub r2, r2, #(CONFIG_SYS_PHY_UBOOT_BASE - CONFIG_SYS_TEXT_BASE) - b mmu_disable - - .align 5 - /* Run in a single cache-line */ -mmu_disable: - mcr p15, 0, r0, c1, c0, 0 - nop - nop - mov pc, r2 -mmu_disable_phys: - -#ifdef CONFIG_DISABLE_TCM - /* - * Disable the TCMs - */ - mrc p15, 0, r0, c0, c0, 2 /* Return TCM details */ - cmp r0, #0 - beq skip_tcmdisable - mov r1, #0 - mov r2, #1 - tst r0, r2 - mcrne p15, 0, r1, c9, c1, 1 /* Disable Instruction TCM if present*/ - tst r0, r2, LSL #16 - mcrne p15, 0, r1, c9, c1, 0 /* Disable Data TCM if present*/ -skip_tcmdisable: -#endif -#endif - -#ifdef CONFIG_PERIPORT_REMAP - /* Peri port setup */ - ldr r0, =CONFIG_PERIPORT_BASE - orr r0, r0, #CONFIG_PERIPORT_SIZE - mcr p15,0,r0,c15,c2,4 -#endif - - /* - * Go setup Memory and board specific bits prior to relocation. - */ - bl lowlevel_init /* go setup pll,mux,memory */ - - bl _main - -/*------------------------------------------------------------------------------*/ - - .globl c_runtime_cpu_setup -c_runtime_cpu_setup: - - mov pc, lr - -#ifndef CONFIG_SPL_BUILD -/* - ************************************************************************* - * - * Interrupt handling - * - ************************************************************************* - */ -@ -@ IRQ stack frame. -@ -#define S_FRAME_SIZE 72 - -#define S_OLD_R0 68 -#define S_PSR 64 -#define S_PC 60 -#define S_LR 56 -#define S_SP 52 - -#define S_IP 48 -#define S_FP 44 -#define S_R10 40 -#define S_R9 36 -#define S_R8 32 -#define S_R7 28 -#define S_R6 24 -#define S_R5 20 -#define S_R4 16 -#define S_R3 12 -#define S_R2 8 -#define S_R1 4 -#define S_R0 0 - -#define MODE_SVC 0x13 -#define I_BIT 0x80 - -/* - * use bad_save_user_regs for abort/prefetch/undef/swi ... - */ - - .macro bad_save_user_regs - /* carve out a frame on current user stack */ - sub sp, sp, #S_FRAME_SIZE - /* Save user registers (now in svc mode) r0-r12 */ - stmia sp, {r0 - r12} - - ldr r2, IRQ_STACK_START_IN - /* get values for "aborted" pc and cpsr (into parm regs) */ - ldmia r2, {r2 - r3} - /* grab pointer to old stack */ - add r0, sp, #S_FRAME_SIZE - - add r5, sp, #S_SP - mov r1, lr - /* save sp_SVC, lr_SVC, pc, cpsr */ - stmia r5, {r0 - r3} - /* save current stack into r0 (param register) */ - mov r0, sp - .endm - - .macro get_bad_stack - ldr r13, IRQ_STACK_START_IN @ setup our mode stack - - /* save caller lr in position 0 of saved stack */ - str lr, [r13] - /* get the spsr */ - mrs lr, spsr - /* save spsr in position 1 of saved stack */ - str lr, [r13, #4] - - /* prepare SVC-Mode */ - mov r13, #MODE_SVC - @ msr spsr_c, r13 - /* switch modes, make sure moves will execute */ - msr spsr, r13 - /* capture return pc */ - mov lr, pc - /* jump to next instruction & switch modes. */ - movs pc, lr - .endm - - .macro get_bad_stack_swi - /* space on current stack for scratch reg. */ - sub r13, r13, #4 - /* save R0's value. */ - str r0, [r13] - ldr r13, IRQ_STACK_START_IN @ setup our mode stack - /* save caller lr in position 0 of saved stack */ - str lr, [r0] - /* get the spsr */ - mrs lr, spsr - /* save spsr in position 1 of saved stack */ - str lr, [r0, #4] - /* restore lr */ - ldr lr, [r0] - /* restore r0 */ - ldr r0, [r13] - /* pop stack entry */ - add r13, r13, #4 - .endm - -/* - * exception handlers - */ - .align 5 -undefined_instruction: - get_bad_stack - bad_save_user_regs - bl do_undefined_instruction - - .align 5 -software_interrupt: - get_bad_stack_swi - bad_save_user_regs - bl do_software_interrupt - - .align 5 -prefetch_abort: - get_bad_stack - bad_save_user_regs - bl do_prefetch_abort - - .align 5 -data_abort: - get_bad_stack - bad_save_user_regs - bl do_data_abort - - .align 5 -not_used: - get_bad_stack - bad_save_user_regs - bl do_not_used - - .align 5 -irq: - get_bad_stack - bad_save_user_regs - bl do_irq - - .align 5 -fiq: - get_bad_stack - bad_save_user_regs - bl do_fiq -#endif /* CONFIG_SPL_BUILD */ |