diff options
Diffstat (limited to 'cpu/mcf52x2/start.S')
| -rw-r--r-- | cpu/mcf52x2/start.S | 495 |
1 files changed, 0 insertions, 495 deletions
diff --git a/cpu/mcf52x2/start.S b/cpu/mcf52x2/start.S deleted file mode 100644 index 0dd4de5..0000000 --- a/cpu/mcf52x2/start.S +++ /dev/null @@ -1,495 +0,0 @@ -/* - * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> - * Based on code from Bernhard Kuhn <bkuhn@metrowerks.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> -#include <timestamp.h> -#include "version.h" - -#ifndef CONFIG_IDENT_STRING -#define CONFIG_IDENT_STRING "" -#endif - - -#define _START _start -#define _FAULT _fault - - -#define SAVE_ALL \ - move.w #0x2700,%sr; /* disable intrs */ \ - subl #60,%sp; /* space for 15 regs */ \ - moveml %d0-%d7/%a0-%a6,%sp@; \ - -#define RESTORE_ALL \ - moveml %sp@,%d0-%d7/%a0-%a6; \ - addl #60,%sp; /* space for 15 regs */ \ - rte - -/* If we come from a pre-loader we don't need an initial exception - * table. - */ -#if !defined(CONFIG_MONITOR_IS_IN_RAM) - -.text -/* - * Vector table. This is used for initial platform startup. - * These vectors are to catch any un-intended traps. - */ -_vectors: - -.long 0x00000000 /* Flash offset is 0 until we setup CS0 */ -#if defined(CONFIG_M5282) && (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) -.long _start - TEXT_BASE -#else -.long _START -#endif - -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -#endif - - .text - - -#if defined(CONFIG_SYS_INT_FLASH_BASE) && \ - (defined(CONFIG_M5282) || defined(CONFIG_M5281)) - #if (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) - .long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */ - .long 0xFFFFFFFF /* all sectors protected */ - .long 0x00000000 /* supervisor/User restriction */ - .long 0x00000000 /* programm/data space restriction */ - .long 0x00000000 /* Flash security */ - #endif -#endif - .globl _start -_start: - nop - nop - move.w #0x2700,%sr - -#if defined(CONFIG_M5208) - /* Initialize RAMBAR: locate SRAM and validate it */ - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 - movec %d0, %RAMBAR1 -#endif - -#if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5253) - move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set MBAR address + valid flag */ - move.c %d0, %MBAR - - /*** The 5249 has MBAR2 as well ***/ -#ifdef CONFIG_SYS_MBAR2 - move.l #(CONFIG_SYS_MBAR2 + 1), %d0 /* Get MBAR2 address */ - movec %d0, #0xc0e /* Set MBAR2 */ -#endif - - move.l #(CONFIG_SYS_INIT_RAM_ADDR + 1), %d0 - movec %d0, %RAMBAR0 -#endif /* CONFIG_M5272 || CONFIG_M5249 || CONFIG_M5253 */ - -#if defined(CONFIG_M5282) || defined(CONFIG_M5271) - /* Initialize IPSBAR */ - move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */ - move.l %d0, 0x40000000 - - /* Initialize RAMBAR1: locate SRAM and validate it */ - move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0 - movec %d0, %RAMBAR1 - -#if defined(CONFIG_M5282) -#if (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) - /* Setup code in SRAM to initialize FLASHBAR, if start from internal Flash */ - - move.l #(_flashbar_setup-CONFIG_SYS_INT_FLASH_BASE), %a0 - move.l #(_flashbar_setup_end-CONFIG_SYS_INT_FLASH_BASE), %a1 - move.l #(CONFIG_SYS_INIT_RAM_ADDR), %a2 -_copy_flash: - move.l (%a0)+, (%a2)+ - cmp.l %a0, %a1 - bgt.s _copy_flash - jmp CONFIG_SYS_INIT_RAM_ADDR - -_flashbar_setup: - /* Initialize FLASHBAR: locate internal Flash and validate it */ - move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0 - movec %d0, %FLASHBAR - jmp _after_flashbar_copy.L /* Force jump to absolute address */ -_flashbar_setup_end: - nop -_after_flashbar_copy: -#else - /* Setup code to initialize FLASHBAR, if start from external Memory */ - move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0 - movec %d0, %FLASHBAR -#endif /* (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) */ - -#endif -#endif - /* if we come from a pre-loader we have no exception table and - * therefore no VBR to set - */ -#if !defined(CONFIG_MONITOR_IS_IN_RAM) -#if defined(CONFIG_M5282) && (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) - move.l #CONFIG_SYS_INT_FLASH_BASE, %d0 -#else - move.l #CONFIG_SYS_FLASH_BASE, %d0 -#endif - movec %d0, %VBR -#endif - -#ifdef CONFIG_M5275 - /* Initialize IPSBAR */ - move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */ - move.l %d0, 0x40000000 -/* movec %d0, %MBAR */ - - /* Initialize RAMBAR: locate SRAM and validate it */ - move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0 - movec %d0, %RAMBAR1 -#endif - - /* set stackpointer to end of internal ram to get some stackspace for the first c-code */ - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp - clr.l %sp@- - - move.l #__got_start, %a5 /* put relocation table address to a5 */ - - bsr cpu_init_f /* run low-level CPU init code (from flash) */ - bsr board_init_f /* run low-level board init code (from flash) */ - - /* board_init_f() does not return */ - -/*------------------------------------------------------------------------------*/ - -/* - * void relocate_code (addr_sp, gd, addr_moni) - * - * This "function" does not return, instead it continues in RAM - * after relocating the monitor code. - * - * r3 = dest - * r4 = src - * r5 = length in bytes - * r6 = cachelinesize - */ - .globl relocate_code -relocate_code: - link.w %a6,#0 - move.l 8(%a6), %sp /* set new stack pointer */ - - move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ - move.l 16(%a6), %a0 /* Save copy of Destination Address */ - - move.l #CONFIG_SYS_MONITOR_BASE, %a1 - move.l #__init_end, %a2 - move.l %a0, %a3 - /* copy the code to RAM */ -1: - move.l (%a1)+, (%a3)+ - cmp.l %a1,%a2 - bgt.s 1b - -/* - * We are done. Do not return, instead branch to second part of board - * initialization, now running from RAM. - */ - move.l %a0, %a1 - add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 - jmp (%a1) - -in_ram: - -clear_bss: - /* - * Now clear BSS segment - */ - move.l %a0, %a1 - add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 - move.l %a0, %d1 - add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 -6: - clr.l (%a1)+ - cmp.l %a1,%d1 - bgt.s 6b - - /* - * fix got table in RAM - */ - move.l %a0, %a1 - add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 - move.l %a1,%a5 /* * fix got pointer register a5 */ - - move.l %a0, %a2 - add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 - -7: - move.l (%a1),%d1 - sub.l #_start,%d1 - add.l %a0,%d1 - move.l %d1,(%a1)+ - cmp.l %a2, %a1 - bne 7b - -#if defined(CONFIG_M5281) || defined(CONFIG_M5282) - /* patch the 3 accesspoints to 3 ichache_state */ - /* quick and dirty */ - - move.l %a0,%d1 - add.l #(icache_state - CONFIG_SYS_MONITOR_BASE),%d1 - move.l %a0,%a1 - add.l #(icache_state_access_1+2 - CONFIG_SYS_MONITOR_BASE),%a1 - move.l %d1,(%a1) - move.l %a0,%a1 - add.l #(icache_state_access_2+2 - CONFIG_SYS_MONITOR_BASE),%a1 - move.l %d1,(%a1) - move.l %a0,%a1 - add.l #(icache_state_access_3+2 - CONFIG_SYS_MONITOR_BASE),%a1 - move.l %d1,(%a1) -#endif - - /* calculate relative jump to board_init_r in ram */ - move.l %a0, %a1 - add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 - - /* set parameters for board_init_r */ - move.l %a0,-(%sp) /* dest_addr */ - move.l %d0,-(%sp) /* gd */ -#if defined(DEBUG) && (TEXT_BASE != CONFIG_SYS_INT_FLASH_BASE) && \ - defined(CONFIG_SYS_HALT_BEFOR_RAM_JUMP) - halt -#endif - jsr (%a1) - -/*------------------------------------------------------------------------------*/ -/* exception code */ - .globl _fault -_fault: - jmp _fault - - .globl _exc_handler -_exc_handler: - SAVE_ALL - movel %sp,%sp@- - bsr exc_handler - addql #4,%sp - RESTORE_ALL - - .globl _int_handler -_int_handler: - SAVE_ALL - movel %sp,%sp@- - bsr int_handler - addql #4,%sp - RESTORE_ALL - -/*------------------------------------------------------------------------------*/ -/* cache functions */ -#ifdef CONFIG_M5208 - .globl icache_enable -icache_enable: - move.l #0x01000000, %d0 /* Invalidate cache cmd */ - movec %d0, %CACR /* Invalidate cache */ - move.l #(CONFIG_SYS_SDRAM_BASE + 0xC000), %d0 /* Setup cache mask */ - movec %d0, %ACR0 /* Enable cache */ - - move.l #0x80000200, %d0 /* Setup cache mask */ - movec %d0, %CACR /* Enable cache */ - nop - - move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1 - moveq #1, %d0 - move.l %d0, (%a1) - rts -#endif - -#ifdef CONFIG_M5271 - .globl icache_enable -icache_enable: - move.l #0x01000000, %d0 /* Invalidate cache cmd */ - movec %d0, %CACR /* Invalidate cache */ - move.l #(CONFIG_SYS_SDRAM_BASE + 0xc000), %d0 /* Setup cache mask */ - movec %d0, %ACR0 /* Enable cache */ - - move.l #0x80000200, %d0 /* Setup cache mask */ - movec %d0, %CACR /* Enable cache */ - nop - - move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1 - moveq #1, %d0 - move.l %d0, (%a1) - rts -#endif - -#ifdef CONFIG_M5272 - .globl icache_enable -icache_enable: - move.l #0x01000000, %d0 /* Invalidate cache cmd */ - movec %d0, %CACR /* Invalidate cache */ - move.l #0x0000c000, %d0 /* Setup cache mask */ - movec %d0, %ACR0 /* Enable cache */ - move.l #0xff00c000, %d0 /* Setup cache mask */ - movec %d0, %ACR1 /* Enable cache */ - move.l #0x80000100, %d0 /* Setup cache mask */ - movec %d0, %CACR /* Enable cache */ - moveq #1, %d0 - move.l %d0, icache_state - rts -#endif - -#if defined(CONFIG_M5275) -/* - * Instruction cache only - */ - .globl icache_enable -icache_enable: - move.l #0x01400000, %d0 /* Invalidate cache cmd */ - movec %d0, %CACR /* Invalidate cache */ - move.l #0x0000c000, %d0 /* Setup SDRAM caching */ - movec %d0, %ACR0 /* Enable cache */ - move.l #0x00000000, %d0 /* No other caching */ - movec %d0, %ACR1 /* Enable cache */ - move.l #0x80400100, %d0 /* Setup cache mask */ - movec %d0, %CACR /* Enable cache */ - moveq #1, %d0 - move.l %d0, icache_state - rts -#endif - -#ifdef CONFIG_M5282 - .globl icache_enable -icache_enable: - move.l #0x01000000, %d0 /* Invalidate cache cmd */ - movec %d0, %CACR /* Invalidate cache */ - move.l #0x0000c000, %d0 /* Setup cache mask */ - movec %d0, %ACR0 /* Enable cache */ - move.l #0xff00c000, %d0 /* Setup cache mask */ - movec %d0, %ACR1 /* Enable cache */ - move.l #0x80400100, %d0 /* Setup cache mask, data cache disabel*/ - movec %d0, %CACR /* Enable cache */ - moveq #1, %d0 -icache_state_access_1: - move.l %d0, icache_state - rts -#endif - -#if defined(CONFIG_M5249) || defined(CONFIG_M5253) - .globl icache_enable -icache_enable: - /* - * Note: The 5249 Documentation doesn't give a bit position for CINV! - * From the 5272 and the 5307 documentation, I have deduced that it is - * probably CACR[24]. Should someone say something to Motorola? - * ~Jeremy - */ - move.l #0x01000000, %d0 /* Invalidate whole cache */ - move.c %d0,%CACR - move.l #0xff00c000, %d0 /* Set FLASH cachable: always match (SM=0b10) */ - move.c %d0, %ACR0 - move.l #0x0000c000, %d0 /* Set SDRAM cachable: always match (SM=0b10) */ - move.c %d0, %ACR1 - move.l #0x90000200, %d0 /* Set cache enable cmd */ - move.c %d0,%CACR - moveq #1, %d0 - move.l %d0, icache_state - rts -#endif - - .globl icache_disable -icache_disable: - move.l #0x00000100, %d0 /* Setup cache mask */ - movec %d0, %CACR /* Enable cache */ - clr.l %d0 /* Setup cache mask */ - movec %d0, %ACR0 /* Enable cache */ - movec %d0, %ACR1 /* Enable cache */ - moveq #0, %d0 -icache_state_access_2: - move.l %d0, icache_state - rts - - .globl icache_status -icache_status: -icache_state_access_3: - move.l #(icache_state), %a0 - move.l (%a0), %d0 - rts - - .data -icache_state: - .long 0 /* cache is diabled on inirialization */ - - .globl dcache_enable -dcache_enable: - /* dummy function */ - rts - - .globl dcache_disable -dcache_disable: - /* dummy function */ - rts - - .globl dcache_status -dcache_status: - /* dummy function */ - rts - -/*------------------------------------------------------------------------------*/ - - .globl version_string -version_string: - .ascii U_BOOT_VERSION - .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" - .ascii CONFIG_IDENT_STRING, "\0" - .align 4 |