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Diffstat (limited to 'cpu/mcf5227x/start.S')
| -rw-r--r-- | cpu/mcf5227x/start.S | 513 |
1 files changed, 0 insertions, 513 deletions
diff --git a/cpu/mcf5227x/start.S b/cpu/mcf5227x/start.S deleted file mode 100644 index 30428f1..0000000 --- a/cpu/mcf5227x/start.S +++ /dev/null @@ -1,513 +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" -#include <asm/cache.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 defined(CONFIG_CF_SBF) -#define ASM_DRAMINIT (asm_dram_init - TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) -#define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR) -#endif - -.text -/* - * Vector table. This is used for initial platform startup. - * These vectors are to catch any un-intended traps. - */ -_vectors: - -#if defined(CONFIG_CF_SBF) -INITSP: .long 0 /* Initial SP */ -INITPC: .long ASM_DRAMINIT /* Initial PC */ -#else -INITSP: .long 0 /* Initial SP */ -INITPC: .long _START /* Initial PC */ -#endif - -vector02: .long _FAULT /* Access Error */ -vector03: .long _FAULT /* Address Error */ -vector04: .long _FAULT /* Illegal Instruction */ -vector05: .long _FAULT /* Reserved */ -vector06: .long _FAULT /* Reserved */ -vector07: .long _FAULT /* Reserved */ -vector08: .long _FAULT /* Privilege Violation */ -vector09: .long _FAULT /* Trace */ -vector0A: .long _FAULT /* Unimplemented A-Line */ -vector0B: .long _FAULT /* Unimplemented F-Line */ -vector0C: .long _FAULT /* Debug Interrupt */ -vector0D: .long _FAULT /* Reserved */ -vector0E: .long _FAULT /* Format Error */ -vector0F: .long _FAULT /* Unitialized Int. */ - -/* Reserved */ -vector10_17: -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -vector18: .long _FAULT /* Spurious Interrupt */ -vector19: .long _FAULT /* Autovector Level 1 */ -vector1A: .long _FAULT /* Autovector Level 2 */ -vector1B: .long _FAULT /* Autovector Level 3 */ -vector1C: .long _FAULT /* Autovector Level 4 */ -vector1D: .long _FAULT /* Autovector Level 5 */ -vector1E: .long _FAULT /* Autovector Level 6 */ -vector1F: .long _FAULT /* Autovector Level 7 */ - -#if !defined(CONFIG_CF_SBF) -/* TRAP #0 - #15 */ -vector20_2F: -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -/* Reserved */ -vector30_3F: -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT -.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT - -vector64_127: -.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 - -vector128_191: -.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 - -vector192_255: -.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 - -#if defined(CONFIG_CF_SBF) - /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */ -asm_sbf_img_hdr: - .long 0x00000000 /* checksum, not yet implemented */ - .long 0x00020000 /* image length */ - .long TEXT_BASE /* image to be relocated at */ - -asm_dram_init: - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 - movec %d0, %RAMBAR1 /* init Rambar */ - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp - clr.l %sp@- - - /* Must disable global address */ - move.l #0xFC008000, %a1 - move.l #(CONFIG_SYS_CS0_BASE), (%a1) - move.l #0xFC008008, %a1 - move.l #(CONFIG_SYS_CS0_CTRL), (%a1) - move.l #0xFC008004, %a1 - move.l #(CONFIG_SYS_CS0_MASK), (%a1) - - /* - * Dram Initialization - * a1, a2, and d0 - */ - /* mscr sdram */ - move.l #0xFC0A4074, %a1 - move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1) - nop - - /* SDRAM Chip 0 and 1 */ - move.l #0xFC0B8110, %a1 - move.l #0xFC0B8114, %a2 - - /* calculate the size */ - move.l #0x13, %d1 - move.l #(CONFIG_SYS_SDRAM_SIZE), %d2 -#ifdef CONFIG_SYS_SDRAM_BASE1 - lsr.l #1, %d2 -#endif - -dramsz_loop: - lsr.l #1, %d2 - add.l #1, %d1 - cmp.l #1, %d2 - bne dramsz_loop - - /* SDRAM Chip 0 and 1 */ - move.l #(CONFIG_SYS_SDRAM_BASE), (%a1) - or.l %d1, (%a1) -#ifdef CONFIG_SYS_SDRAM_BASE1 - move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2) - or.l %d1, (%a2) -#endif - nop - - /* dram cfg1 and cfg2 */ - move.l #0xFC0B8008, %a1 - move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1) - nop - move.l #0xFC0B800C, %a2 - move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2) - nop - - move.l #0xFC0B8000, %a1 /* Mode */ - move.l #0xFC0B8004, %a2 /* Ctrl */ - - /* Issue PALL */ - move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) - nop - - /* Issue LEMR */ - move.l #(CONFIG_SYS_SDRAM_MODE), (%a1) - nop - move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1) - nop - - move.l #1000, %d0 -wait1000: - nop - subq.l #1, %d0 - bne wait1000 - - /* Issue PALL */ - move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) - nop - - /* Perform two refresh cycles */ - move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0 - nop - move.l %d0, (%a2) - move.l %d0, (%a2) - nop - - move.l #(CONFIG_SYS_SDRAM_CTRL), %d0 - and.l #0x7FFFFFFF, %d0 - or.l #0x10000c00, %d0 - move.l %d0, (%a2) - nop - - /* - * DSPI Initialization - * a0 - general, sram - 0x80008000 - 32, see M52277EVB.h - * a1 - dspi status - * a2 - dtfr - * a3 - drfr - * a4 - Dst addr - */ - - /* Enable pins for DSPI mode - chip-selects are enabled later */ - move.l #0xFC0A4036, %a0 - move.b #0x3F, %d0 - move.b %d0, (%a0) - - /* DSPI CS */ -#ifdef CONFIG_SYS_DSPI_CS0 - move.b (%a0), %d0 - or.l #0xC0, %d0 - move.b %d0, (%a0) -#endif -#ifdef CONFIG_SYS_DSPI_CS2 - move.l #0xFC0A4037, %a0 - move.b (%a0), %d0 - or.l #0x10, %d0 - move.b %d0, (%a0) -#endif - nop - - /* Configure DSPI module */ - move.l #0xFC05C000, %a0 - move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */ - - move.l #0xFC05C00C, %a0 - move.l #0x3E000011, (%a0) - - move.l #0xFC05C034, %a2 /* dtfr */ - move.l #0xFC05C03B, %a3 /* drfr */ - - move.l #(ASM_SBF_IMG_HDR + 4), %a1 - move.l (%a1)+, %d5 - move.l (%a1), %a4 - - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0 - move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4 - - move.l #0xFC05C02C, %a1 /* dspi status */ - - /* Issue commands and address */ - move.l #0x8004000B, %d2 /* Fast Read Cmd */ - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - move.l #0x80040000, %d2 /* Address byte 2 */ - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - move.l #0x80040000, %d2 /* Address byte 1 */ - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - move.l #0x80040000, %d2 /* Address byte 0 */ - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - move.l #0x80040000, %d2 /* Dummy Wr and Rd */ - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - /* Transfer serial boot header to sram */ -asm_dspi_rd_loop1: - move.l #0x80040000, %d2 - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - move.b %d1, (%a0) /* read, copy to dst */ - - add.l #1, %a0 /* inc dst by 1 */ - sub.l #1, %d4 /* dec cnt by 1 */ - bne asm_dspi_rd_loop1 - - /* Transfer u-boot from serial flash to memory */ -asm_dspi_rd_loop2: - move.l #0x80040000, %d2 - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - move.b %d1, (%a4) /* read, copy to dst */ - - add.l #1, %a4 /* inc dst by 1 */ - sub.l #1, %d5 /* dec cnt by 1 */ - bne asm_dspi_rd_loop2 - - move.l #0x00040000, %d2 /* Terminate */ - jsr asm_dspi_wr_status - jsr asm_dspi_rd_status - - /* jump to memory and execute */ - move.l #(TEXT_BASE + 0x400), %a0 - move.l %a0, (%a1) - jmp (%a0) - -asm_dspi_wr_status: - move.l (%a1), %d0 /* status */ - and.l #0x0000F000, %d0 - cmp.l #0x00003000, %d0 - bgt asm_dspi_wr_status - - move.l %d2, (%a2) - rts - -asm_dspi_rd_status: - move.l (%a1), %d0 /* status */ - and.l #0x000000F0, %d0 - lsr.l #4, %d0 - cmp.l #0, %d0 - beq asm_dspi_rd_status - - move.b (%a3), %d1 - rts -#endif /* CONFIG_CF_SBF */ - - .text - . = 0x400 - .globl _start -_start: - nop - nop - move.w #0x2700,%sr /* Mask off Interrupt */ - - /* Set vector base register at the beginning of the Flash */ -#if defined(CONFIG_CF_SBF) - move.l #TEXT_BASE, %d0 - movec %d0, %VBR -#else - move.l #CONFIG_SYS_FLASH_BASE, %d0 - movec %d0, %VBR - - move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 - movec %d0, %RAMBAR1 -#endif - - /* invalidate and disable cache */ - move.l #CF_CACR_CINV, %d0 /* Invalidate cache cmd */ - movec %d0, %CACR /* Invalidate cache */ - move.l #0, %d0 - movec %d0, %ACR0 - movec %d0, %ACR1 - - /* initialize general use internal ram */ - move.l #0, %d0 - move.l #(ICACHE_STATUS), %a1 /* icache */ - move.l #(DCACHE_STATUS), %a2 /* icache */ - move.l %d0, (%a1) - move.l %d0, (%a2) - - /* 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 - - /* 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 */ - 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 - -/*------------------------------------------------------------------------------*/ - - .globl version_string -version_string: - .ascii U_BOOT_VERSION - .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" - .ascii CONFIG_IDENT_STRING, "\0" - .align 4 |