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Diffstat (limited to 'board/denx/m28evk/start.S')
| -rw-r--r-- | board/denx/m28evk/start.S | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/board/denx/m28evk/start.S b/board/denx/m28evk/start.S deleted file mode 100644 index 94696d6cd..000000000 --- a/board/denx/m28evk/start.S +++ /dev/null @@ -1,234 +0,0 @@ -/* - * armboot - Startup Code for ARM926EJS CPU-core - * - * Copyright (c) 2003 Texas Instruments - * - * ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------ - * - * Copyright (c) 2001 Marius Groger <mag@sysgo.de> - * Copyright (c) 2002 Alex Zupke <azu@sysgo.de> - * Copyright (c) 2002 Gary Jennejohn <garyj@denx.de> - * Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com> - * Copyright (c) 2003 Kshitij <kshitij@ti.com> - * Copyright (c) 2010 Albert Aribaud <albert.u.boot@aribaud.net> - * - * Change to support call back into iMX28 bootrom - * Copyright (c) 2011 Marek Vasut <marek.vasut@gmail.com> - * on behalf of DENX Software Engineering GmbH - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <asm-offsets.h> -#include <config.h> -#include <common.h> -#include <version.h> - -#if defined(CONFIG_OMAP1610) -#include <./configs/omap1510.h> -#elif defined(CONFIG_OMAP730) -#include <./configs/omap730.h> -#endif - -/* - ************************************************************************* - * - * Jump vector table as in table 3.1 in [1] - * - ************************************************************************* - */ - - -.globl _start -_start: - b reset - b undefined_instruction - b software_interrupt - b prefetch_abort - b data_abort - b not_used - b irq - b fiq - -/* - * Vector table, located at address 0x20. - * This table allows the code running AFTER SPL, the U-Boot, to install it's - * interrupt handlers here. The problem is that the U-Boot is loaded into RAM, - * including it's interrupt vectoring table and the table at 0x0 is still the - * SPLs. So if interrupt happens in U-Boot, the SPLs interrupt vectoring table - * is still used. - */ -_vt_reset: - .word _reset -_vt_undefined_instruction: - .word _hang -_vt_software_interrupt: - .word _hang -_vt_prefetch_abort: - .word _hang -_vt_data_abort: - .word _hang -_vt_not_used: - .word _reset -_vt_irq: - .word _hang -_vt_fiq: - .word _hang - -reset: - ldr pc, _vt_reset -undefined_instruction: - ldr pc, _vt_undefined_instruction -software_interrupt: - ldr pc, _vt_software_interrupt -prefetch_abort: - ldr pc, _vt_prefetch_abort -data_abort: - ldr pc, _vt_data_abort -not_used: - ldr pc, _vt_not_used -irq: - ldr pc, _vt_irq -fiq: - ldr pc, _vt_fiq - - .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 - * - ************************************************************************* - */ - -.globl _TEXT_BASE -_TEXT_BASE: - .word CONFIG_SYS_TEXT_BASE - -/* - * These are defined in the board-specific linker script. - * Subtracting _start from them lets the linker put their - * relative position in the executable instead of leaving - * them null. - */ -.globl _bss_start_ofs -_bss_start_ofs: - .word __bss_start - _start - -.globl _bss_end_ofs -_bss_end_ofs: - .word __bss_end__ - _start - -.globl _end_ofs -_end_ofs: - .word _end - _start - -#ifdef CONFIG_USE_IRQ -/* IRQ stack memory (calculated at run-time) */ -.globl IRQ_STACK_START -IRQ_STACK_START: - .word 0x0badc0de - -/* IRQ stack memory (calculated at run-time) */ -.globl FIQ_STACK_START -FIQ_STACK_START: - .word 0x0badc0de -#endif - -/* 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: - /* - * Store all registers on old stack pointer, this will allow us later to - * return to the BootROM and let the BootROM load U-Boot into RAM. - */ - push {r0-r12,r14} - - /* - * set the cpu to SVC32 mode - */ - mrs r0,cpsr - bic r0,r0,#0x1f - orr r0,r0,#0xd3 - msr cpsr,r0 - - /* - * we do sys-critical inits only at reboot, - * not when booting from ram! - */ -#ifndef CONFIG_SKIP_LOWLEVEL_INIT - bl cpu_init_crit -#endif - - bl board_init_ll - - pop {r0-r12,r14} - bx lr - -/* - ************************************************************************* - * - * CPU_init_critical registers - * - * setup important registers - * setup memory timing - * - ************************************************************************* - */ -#ifndef CONFIG_SKIP_LOWLEVEL_INIT -cpu_init_crit: - /* - * 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 */ - mcr p15, 0, r0, c1, c0, 0 - - mov pc, lr /* back to my caller */ - - .align 5 -#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ - -_hang: - ldr sp, _TEXT_BASE /* switch to abort stack */ -1: - bl 1b /* hang and never return */ |