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- /*
- * linux/arch/h8300/platform/h8s/generic/crt0_rom.S
- *
- * Yoshinori Sato <ysato@users.sourceforge.jp>
- *
- * Platform depend startup
- * Target Archtecture: generic
- * Memory Layout : ROM
- */
- #define ASSEMBLY
- #include <asm/linkage.h>
- #include <asm/regs267x.h>
-
- .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_rom.S"
- /* CPU Reset entry */
- SYMBOL_NAME_LABEL(_start)
- mov.l #__ramend,sp
- ldc #0x80,ccr
- ldc #0,exr
- bclr #4,@INTCR:8
- bset #5,@INTCR:8 /* Interrupt mode 2 */
-
- /* Peripheral Setup */
-
- /* copy .data */
- #if !defined(CONFIG_H8S_SIM)
- mov.l #__begin_data,er5
- mov.l #__sdata,er6
- mov.l #__edata,er4
- sub.l er6,er4
- shlr.l #2,er4
- 1:
- mov.l @er5+,er0
- mov.l er0,@er6
- adds #4,er6
- dec.l #1,er4
- bne 1b
- #endif
- /* .bss clear */
- mov.l #__sbss,er5
- mov.l #__ebss,er4
- sub.l er5,er4
- shlr.l #2,er4
- sub.l er0,er0
- 1:
- mov.l er0,@er5
- adds #4,er5
- dec.l #1,er4
- bne 1b
- /* linux 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
- .byte 0x00,0x00
- ;; P2DDR
- .byte 0x00,0x00
- ;; P3DDR
- .byte 0x00,0x00
- ;; P4DDR
- .byte 0x00,0x00
- ;; P5DDR
- .byte 0x00,0x00
- ;; P6DDR
- .byte 0x00,0x00
- ;; dummy
- .byte 0x00,0x00
- ;; P8DDR
- .byte 0x00,0x00
- ;; PADDR
- .byte 0x00,0x00
- ;; PBDDR
- .byte 0x00,0x00
- ;; PCDDR
- .byte 0x00,0x00
- ;; PDDDR
- .byte 0x00,0x00
- ;; PEDDR
- .byte 0x00,0x00
- ;; PFDDR
- .byte 0x00,0x00
- ;; PGDDR
- .byte 0x00,0x00
- ;; PHDDR
- .byte 0x00,0x00
- .section .rodata
- __target_name:
- .asciz "generic"
-
- .section .bss
- __command_line:
- .space 512
- /* interrupt vector */
- .section .vectors,"ax"
- .long __start
- .long __start
- vector = 2
- .rept 126-1
- .long _interrupt_redirect_table+vector*4
- vector = vector + 1
- .endr
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