| /* |
| * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> |
| * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <asm-offsets.h> |
| #include <config.h> |
| #include "version.h" |
| #include <asm/cache.h> |
| |
| #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 - CONFIG_SYS_TEXT_BASE + \ |
| CONFIG_SYS_INIT_RAM_ADDR) |
| #define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_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_0F: |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| /* Reserved */ |
| vector10_17: |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| vector18_1F: |
| .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT |
| |
| #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 CONFIG_SYS_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 |
| */ |
| 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 #(CONFIG_SYS_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 #CONFIG_SYS_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) |
| |
| /* put relocation table address to a5 */ |
| move.l #__got_start, %a5 |
| |
| /* setup stack initially on top of internal static ram */ |
| move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp |
| |
| /* |
| * if configured, malloc_f arena will be reserved first, |
| * then (and always) gd struct space will be reserved |
| */ |
| move.l %sp, -(%sp) |
| bsr board_init_f_alloc_reserve |
| |
| /* update stack and frame-pointers */ |
| move.l %d0, %sp |
| move.l %sp, %fp |
| |
| /* initialize reserved area */ |
| move.l %d0, -(%sp) |
| bsr board_init_f_init_reserve |
| |
| /* run low-level CPU init code (from flash) */ |
| bsr cpu_init_f |
| clr.l %sp@- |
| |
| /* run low-level board init code (from flash) */ |
| bsr board_init_f |
| |
| /* 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: |
| bra _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_STRING, "\0" |
| .align 4 |
