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Diffstat (limited to 'cpu/microblaze/start.S')
| -rw-r--r-- | cpu/microblaze/start.S | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/cpu/microblaze/start.S b/cpu/microblaze/start.S deleted file mode 100644 index 2e9a08d..0000000 --- a/cpu/microblaze/start.S +++ /dev/null @@ -1,150 +0,0 @@ -/* - * (C) Copyright 2007 Michal Simek - * (C) Copyright 2004 Atmark Techno, Inc. - * - * Michal SIMEK <monstr@monstr.eu> - * Yasushi SHOJI <yashi@atmark-techno.com> - * - * 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 <config.h> - - .text - .global _start -_start: - mts rmsr, r0 /* disable cache */ - addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET - addi r1, r1, -4 /* Decrement SP to top of memory */ - /* add opcode instruction for 32bit jump - 2 instruction imm & brai*/ - addi r6, r0, 0xb0000000 /* hex b000 opcode imm */ - swi r6, r0, 0x0 /* reset address */ - swi r6, r0, 0x8 /* user vector exception */ - swi r6, r0, 0x10 /* interrupt */ - swi r6, r0, 0x20 /* hardware exception */ - - addi r6, r0, 0xb8080000 /* hew b808 opcode brai*/ - swi r6, r0, 0x4 /* reset address */ - swi r6, r0, 0xC /* user vector exception */ - swi r6, r0, 0x14 /* interrupt */ - swi r6, r0, 0x24 /* hardware exception */ - -#ifdef CONFIG_SYS_RESET_ADDRESS - /* reset address */ - addik r6, r0, CONFIG_SYS_RESET_ADDRESS - sw r6, r1, r0 - lhu r7, r1, r0 - shi r7, r0, 0x2 - shi r6, r0, 0x6 -/* - * Copy U-Boot code to TEXT_BASE - * solve problem with sbrk_base - */ -#if (CONFIG_SYS_RESET_ADDRESS != TEXT_BASE) - addi r4, r0, __end - addi r5, r0, __text_start - rsub r4, r5, r4 /* size = __end - __text_start */ - addi r6, r0, CONFIG_SYS_RESET_ADDRESS /* source address */ - addi r7, r0, 0 /* counter */ -4: - lw r8, r6, r7 - sw r8, r5, r7 - addi r7, r7, 0x4 - cmp r8, r4, r7 - blti r8, 4b -#endif -#endif - -#ifdef CONFIG_SYS_USR_EXCEP - /* user_vector_exception */ - addik r6, r0, _exception_handler - sw r6, r1, r0 - lhu r7, r1, r0 - shi r7, r0, 0xa - shi r6, r0, 0xe -#endif - -#ifdef CONFIG_SYS_INTC_0 - /* interrupt_handler */ - addik r6, r0, _interrupt_handler - sw r6, r1, r0 - lhu r7, r1, r0 - shi r7, r0, 0x12 - shi r6, r0, 0x16 -#endif - - /* hardware exception */ - addik r6, r0, _hw_exception_handler - sw r6, r1, r0 - lhu r7, r1, r0 - shi r7, r0, 0x22 - shi r6, r0, 0x26 - - /* enable instruction and data cache */ - mfs r12, rmsr - ori r12, r12, 0xa0 - mts rmsr, r12 - -clear_bss: - /* clear BSS segments */ - addi r5, r0, __bss_start - addi r4, r0, __bss_end - cmp r6, r5, r4 - beqi r6, 3f -2: - swi r0, r5, 0 /* write zero to loc */ - addi r5, r5, 4 /* increment to next loc */ - cmp r6, r5, r4 /* check if we have reach the end */ - bnei r6, 2b -3: /* jumping to board_init */ - brai board_init -1: bri 1b - -/* - * Read 16bit little endian - */ - .text - .global in16 - .ent in16 - .align 2 -in16: lhu r3, r0, r5 - bslli r4, r3, 8 - bsrli r3, r3, 8 - andi r4, r4, 0xffff - or r3, r3, r4 - rtsd r15, 8 - sext16 r3, r3 - .end in16 - -/* - * Write 16bit little endian - * first parameter(r5) - address, second(r6) - short value - */ - .text - .global out16 - .ent out16 - .align 2 -out16: bslli r3, r6, 8 - bsrli r6, r6, 8 - andi r3, r3, 0xffff - or r3, r3, r6 - sh r3, r0, r5 - rtsd r15, 8 - or r0, r0, r0 - .end out16 |