X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farmv7%2Fstart.S;h=5aac7736444c5e7101d680478f23be93c16f7e38;hb=630d23455bf01ef92dba41589fdb338984717f2f;hp=64008ba6cf3d97dab17870c618fe99a6ca7d926f;hpb=5c6db120fc184bae7a344a4e5da83b21164b59a6;p=karo-tx-uboot.git diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index 64008ba6cf..5aac773644 100644 --- a/arch/arm/cpu/armv7/start.S +++ b/arch/arm/cpu/armv7/start.S @@ -10,23 +10,7 @@ * Copyright (c) 2003 Kshitij * Copyright (c) 2006-2008 Syed Mohammed Khasim * - * 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 + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -54,12 +38,19 @@ _irq: .word _irq _fiq: .word _fiq _pad: .word 0x12345678 /* now 16*4=64 */ #else +.globl _undefined_instruction _undefined_instruction: .word undefined_instruction +.globl _software_interrupt _software_interrupt: .word software_interrupt +.globl _prefetch_abort _prefetch_abort: .word prefetch_abort +.globl _data_abort _data_abort: .word data_abort +.globl _not_used _not_used: .word not_used +.globl _irq _irq: .word irq +.globl _fiq _fiq: .word fiq _pad: .word 0x12345678 /* now 16*4=64 */ #endif /* CONFIG_SPL_BUILD */ @@ -94,10 +85,6 @@ _TEXT_BASE: _bss_start_ofs: .word __bss_start - _start -.globl _image_copy_end_ofs -_image_copy_end_ofs: - .word __image_copy_end - _start - .globl _bss_end_ofs _bss_end_ofs: .word __bss_end - _start @@ -130,11 +117,15 @@ IRQ_STACK_START_IN: reset: bl save_boot_params /* - * set the cpu to SVC32 mode + * disable interrupts (FIQ and IRQ), also set the cpu to SVC32 mode, + * except if in HYP mode already */ mrs r0, cpsr - bic r0, r0, #0x1f - orr r0, r0, #0xd3 + and r1, r0, #0x1f @ mask mode bits + teq r1, #0x1a @ test for HYP mode + bicne r0, r0, #0x1f @ clear all mode bits + orrne r0, r0, #0x13 @ set SVC mode + orr r0, r0, #0xc0 @ disable FIQ and IRQ msr cpsr,r0 /* @@ -163,80 +154,6 @@ reset: /*------------------------------------------------------------------------------*/ -#ifndef CONFIG_SPL_BUILD -/* - * void relocate_code(addr_moni) - * - * This function relocates the monitor code. - */ -ENTRY(relocate_code) - mov r6, r0 /* save addr of destination */ - - adr r0, _start - subs r9, r6, r0 /* r9 <- relocation offset */ - beq relocate_done /* skip relocation */ - mov r1, r6 /* r1 <- scratch for copy_loop */ - ldr r3, _image_copy_end_ofs - add r2, r0, r3 /* r2 <- source end address */ - -copy_loop: - ldmia r0!, {r10-r11} /* copy from source address [r0] */ - stmia r1!, {r10-r11} /* copy to target address [r1] */ - cmp r0, r2 /* until source end address [r2] */ - blo copy_loop - - /* - * fix .rel.dyn relocations - */ - ldr r0, _TEXT_BASE /* r0 <- Text base */ - ldr r10, _dynsym_start_ofs /* r10 <- sym table ofs */ - add r10, r10, r0 /* r10 <- sym table in FLASH */ - ldr r2, _rel_dyn_start_ofs /* r2 <- rel dyn start ofs */ - add r2, r2, r0 /* r2 <- rel dyn start in FLASH */ - ldr r3, _rel_dyn_end_ofs /* r3 <- rel dyn end ofs */ - add r3, r3, r0 /* r3 <- rel dyn end in FLASH */ -fixloop: - ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */ - add r0, r0, r9 /* r0 <- location to fix up in RAM */ - ldr r1, [r2, #4] - and r7, r1, #0xff - cmp r7, #23 /* relative fixup? */ - beq fixrel - cmp r7, #2 /* absolute fixup? */ - beq fixabs - /* ignore unknown type of fixup */ - b fixnext -fixabs: - /* absolute fix: set location to (offset) symbol value */ - mov r1, r1, LSR #4 /* r1 <- symbol index in .dynsym */ - add r1, r10, r1 /* r1 <- address of symbol in table */ - ldr r1, [r1, #4] /* r1 <- symbol value */ - add r1, r1, r9 /* r1 <- relocated sym addr */ - b fixnext -fixrel: - /* relative fix: increase location by offset */ - ldr r1, [r0] - add r1, r1, r9 -fixnext: - str r1, [r0] - add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ - cmp r2, r3 - blo fixloop - -relocate_done: - - bx lr - -_rel_dyn_start_ofs: - .word __rel_dyn_start - _start -_rel_dyn_end_ofs: - .word __rel_dyn_end - _start -_dynsym_start_ofs: - .word __dynsym_start - _start -ENDPROC(relocate_code) - -#endif - ENTRY(c_runtime_cpu_setup) /* * If I-cache is enabled invalidate it @@ -249,11 +166,9 @@ ENTRY(c_runtime_cpu_setup) /* * Move vector table */ -#if !defined(CONFIG_TEGRA) /* Set vector address in CP15 VBAR register */ ldr r0, =_start mcr p15, 0, r0, c12, c0, 0 @Set VBAR -#endif /* !Tegra */ bx lr @@ -463,9 +378,10 @@ ENDPROC(cpu_init_crit) @ spots for abort stack str lr, [r0] @ save caller lr in position 0 @ of saved stack - mrs r0, spsr @ get the spsr + mrs lr, spsr @ get the spsr str lr, [r0, #4] @ save spsr in position 1 of @ saved stack + ldr lr, [r0] @ restore lr ldr r0, [r13] @ restore r0 add r13, r13, #4 @ pop stack entry .endm