/* * 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 <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)