| /* |
| * linux/arch/h8300/platform/h8s/edosk2674/crt0_ram.S |
| * |
| * Yoshinori Sato <ysato@users.sourceforge.jp> |
| * |
| * Platform depend startup |
| * Target Archtecture: EDOSK-2674 |
| * Memory Layout : RAM |
| */ |
| |
| #define ASSEMBLY |
| |
| #include <linux/config.h> |
| #include <asm/linkage.h> |
| #include <asm/regs267x.h> |
| |
| #if !defined(CONFIG_BLKDEV_RESERVE) |
| #if defined(CONFIG_GDB_DEBUG) |
| #define RAMEND (__ramend - 0xc000) |
| #else |
| #define RAMEND __ramend |
| #endif |
| #else |
| #define RAMEND CONFIG_BLKDEV_RESERVE_ADDRESS |
| #endif |
| |
| .global SYMBOL_NAME(_start) |
| .global SYMBOL_NAME(_command_line) |
| .global SYMBOL_NAME(_platform_gpio_table) |
| .global SYMBOL_NAME(_target_name) |
| |
| .h8300s |
| |
| .section .text |
| .file "crt0_ram.S" |
| |
| /* CPU Reset entry */ |
| SYMBOL_NAME_LABEL(_start) |
| mov.l #RAMEND,sp |
| ldc #0x80,ccr |
| ldc #0x00,exr |
| |
| /* Peripheral Setup */ |
| bclr #4,@INTCR:8 /* interrupt mode 2 */ |
| bset #5,@INTCR:8 |
| bclr #0,@IER+1:16 |
| bset #1,@ISCRL+1:16 /* IRQ0 Positive Edge */ |
| bclr #0,@ISCRL+1:16 |
| |
| #if defined(CONFIG_MTD_UCLINUX) |
| /* move romfs image */ |
| jsr @__move_romfs |
| #endif |
| |
| /* .bss clear */ |
| mov.l #__sbss,er5 |
| mov.l er5,er6 |
| mov.l #__ebss,er4 |
| sub.l er5,er4 |
| shlr #2,er4 |
| sub.l er0,er0 |
| 1: |
| mov.l er0,@er5 |
| adds #4,er5 |
| dec.l #1,er4 |
| bne 1b |
| |
| /* copy kernel commandline */ |
| mov.l #COMMAND_START,er5 |
| mov.l #SYMBOL_NAME(command_line),er6 |
| mov.w #512,r4 |
| eepmov.w |
| |
| /* uClinux kernel start */ |
| ldc #0x90,ccr /* running kernel */ |
| mov.l #SYMBOL_NAME(init_thread_union),sp |
| add.l #0x2000,sp |
| jsr @_start_kernel |
| _exit: |
| |
| jmp _exit |
| |
| rts |
| |
| /* I/O port assign information */ |
| __platform_gpio_table: |
| mov.l #gpio_table,er0 |
| rts |
| |
| gpio_table: |
| ;; P1DDR |
| ;; used,ddr |
| .byte 0x00,0x00 |
| ;; P2DDR |
| .byte 0x00,0x00 |
| ;; P3DDR |
| .byte 0x3f,0x3a |
| ;; dummy |
| .byte 0x00,0x00 |
| ;; P5DDR |
| .byte 0x00,0x00 |
| ;; P6DDR |
| .byte 0x00,0x00 |
| ;; P7DDR |
| .byte 0x00,0x00 |
| ;; P8DDR |
| .byte 0x00,0x00 |
| ;; dummy |
| .byte 0x00,0x00 |
| ;; PADDR |
| .byte 0xff,0xff |
| ;; PBDDR |
| .byte 0xff,0x00 |
| ;; PCDDR |
| .byte 0xff,0x00 |
| ;; PDDDR |
| .byte 0xff,0x00 |
| ;; PEDDR |
| .byte 0xff,0x00 |
| ;; PFDDR |
| .byte 0xff,0xff |
| ;; PGDDR |
| .byte 0x0f,0x0f |
| ;; PHDDR |
| .byte 0x0f,0x0f |
| |
| __target_name: |
| .asciz "EDOSK-2674" |
| |
| .section .bootvec,"ax" |
| jmp @SYMBOL_NAME(_start) |
