X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farm1136%2Fstart.S;h=3e2358e132b0d37af789da5d7b2004df4c1070b7;hb=1ad6364eeb4f578e423081d1748e8a3fdf1ab01d;hp=b771d316e42d7b39bace32a7b0038e0fab5e059c;hpb=4bfa18fb99e4ffa9451d9ec95375a5e970847bf8;p=platform%2Fkernel%2Fu-boot.git diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index b771d31..3e2358e 100644 --- a/arch/arm/cpu/arm1136/start.S +++ b/arch/arm/cpu/arm1136/start.S @@ -3,29 +3,13 @@ * * Copyright (c) 2004 Texas Instruments * - * Copyright (c) 2001 Marius Gröger - * Copyright (c) 2002 Alex Züpke + * Copyright (c) 2001 Marius Gröger + * Copyright (c) 2002 Alex Züpke * Copyright (c) 2002 Gary Jennejohn * Copyright (c) 2003 Richard Woodruff * Copyright (c) 2003 Kshitij * - * 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 @@ -33,7 +17,7 @@ #include .globl _start _start: b reset -#ifdef CONFIG_PRELOADER +#ifdef CONFIG_SPL_BUILD ldr pc, _hang ldr pc, _hang ldr pc, _hang @@ -68,7 +52,7 @@ _not_used: .word not_used _irq: .word irq _fiq: .word fiq _pad: .word 0x12345678 /* now 16*4=64 */ -#endif /* CONFIG_PRELOADER */ +#endif /* CONFIG_SPL_BUILD */ .global _end_vect _end_vect: @@ -86,24 +70,6 @@ _end_vect: ************************************************************************* */ -.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 _end - _start - #ifdef CONFIG_USE_IRQ /* IRQ stack memory (calculated at run-time) */ .globl IRQ_STACK_START @@ -134,165 +100,19 @@ reset: orr r0,r0,#0xd3 msr cpsr,r0 -#ifdef CONFIG_OMAP2420H4 - /* Copy vectors to mask ROM indirect addr */ - adr r0, _start /* r0 <- current position of code */ - add r0, r0, #4 /* skip reset vector */ - mov r2, #64 /* r2 <- size to copy */ - add r2, r0, r2 /* r2 <- source end address */ - mov r1, #SRAM_OFFSET0 /* build vect addr */ - mov r3, #SRAM_OFFSET1 - add r1, r1, r3 - mov r3, #SRAM_OFFSET2 - add r1, r1, r3 -next: - ldmia r0!, {r3-r10} /* copy from source address [r0] */ - stmia r1!, {r3-r10} /* copy to target address [r1] */ - cmp r0, r2 /* until source end address [r2] */ - bne next /* loop until equal */ - bl cpy_clk_code /* put dpll adjust code behind vectors */ -#endif /* the mask ROM code should have PLL and others stable */ #ifndef CONFIG_SKIP_LOWLEVEL_INIT bl cpu_init_crit #endif -/* Set stackpointer in internal RAM to call board_init_f */ -call_board_init_f: - ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) - bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - ldr r0,=0x00000000 - -#ifdef CONFIG_NAND_SPL - bl nand_boot -#else -#ifdef CONFIG_ONENAND_IPL - bl start_oneboot -#else - bl board_init_f -#endif /* CONFIG_ONENAND_IPL */ -#endif /* CONFIG_NAND_SPL */ + bl _main /*------------------------------------------------------------------------------*/ -/* - * void relocate_code (addr_sp, gd, addr_moni) - * - * This "function" does not return, instead it continues in RAM - * after relocating the monitor code. - * - */ - .globl relocate_code -relocate_code: - mov r4, r0 /* save addr_sp */ - mov r5, r1 /* save addr of gd */ - mov r6, r2 /* save addr of destination */ - - /* Set up the stack */ -stack_setup: - mov sp, r4 - - adr r0, _start - cmp r0, r6 - beq clear_bss /* skip relocation */ - mov r1, r6 /* r1 <- scratch for copy_loop */ - ldr r3, _bss_start_ofs - add r2, r0, r3 /* r2 <- source end address */ - -copy_loop: - ldmia r0!, {r9-r10} /* copy from source address [r0] */ - stmia r1!, {r9-r10} /* copy to target address [r1] */ - cmp r0, r2 /* until source end address [r2] */ - blo copy_loop - -#ifndef CONFIG_PRELOADER - /* - * fix .rel.dyn relocations - */ - ldr r0, _TEXT_BASE /* r0 <- Text base */ - sub r9, r6, r0 /* r9 <- relocation offset */ - 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 -#endif - -clear_bss: -#ifndef CONFIG_PRELOADER - ldr r0, _bss_start_ofs - ldr r1, _bss_end_ofs - mov r4, r6 /* reloc addr */ - add r0, r0, r4 - add r1, r1, r4 - mov r2, #0x00000000 /* clear */ - -clbss_l:str r2, [r0] /* clear loop... */ - add r0, r0, #4 - cmp r0, r1 - bne clbss_l -#endif /* #ifndef CONFIG_PRELOADER */ + .globl c_runtime_cpu_setup +c_runtime_cpu_setup: -/* - * We are done. Do not return, instead branch to second part of board - * initialization, now running from RAM. - */ -#ifdef CONFIG_NAND_SPL - ldr r0, _nand_boot_ofs - adr r1, _start - add pc, r0, r1 -_nand_boot_ofs - : .word nand_boot - _start -#else -jump_2_ram: - ldr r0, _board_init_r_ofs - adr r1, _start - add lr, r0, r1 - add lr, lr, r9 - /* setup parameters for board_init_r */ - mov r0, r5 /* gd_t */ - mov r1, r6 /* dest_addr */ - /* jump to it ... */ - mov pc, lr - -_board_init_r_ofs: - .word board_init_r - _start -#endif - -_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 + bx lr /* ************************************************************************* @@ -333,7 +153,7 @@ cpu_init_crit: mov pc, lr /* back to my caller */ #endif /* CONFIG_SKIP_LOWLEVEL_INIT */ -#ifndef CONFIG_PRELOADER +#ifndef CONFIG_SPL_BUILD /* ************************************************************************* * @@ -427,8 +247,9 @@ cpu_init_crit: str r0, [r13] @ save R0's value. ldr r0, IRQ_STACK_START_IN @ get data regions start 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 @@ -440,17 +261,16 @@ cpu_init_crit: .macro get_fiq_stack @ setup FIQ stack ldr sp, FIQ_STACK_START .endm -#endif /* CONFIG_PRELOADER */ +#endif /* CONFIG_SPL_BUILD */ /* * exception handlers */ -#ifdef CONFIG_PRELOADER +#ifdef CONFIG_SPL_BUILD .align 5 do_hang: - ldr sp, _TEXT_BASE /* use 32 words about stack */ bl hang /* hang and never return */ -#else /* !CONFIG_PRELOADER */ +#else /* !CONFIG_SPL_BUILD */ .align 5 undefined_instruction: get_bad_stack @@ -516,11 +336,11 @@ fiq: .align 5 .global arm1136_cache_flush arm1136_cache_flush: -#if !defined(CONFIG_SYS_NO_ICACHE) +#if !defined(CONFIG_SYS_ICACHE_OFF) mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache #endif -#if !defined(CONFIG_SYS_NO_DCACHE) +#if !defined(CONFIG_SYS_DCACHE_OFF) mcr p15, 0, r1, c7, c14, 0 @ invalidate D cache #endif mov pc, lr @ back to caller -#endif /* CONFIG_PRELOADER */ +#endif /* CONFIG_SPL_BUILD */