128 lines
2.0 KiB
ArmAsm
128 lines
2.0 KiB
ArmAsm
/*
|
|
* linux/arch/h8300/platform/h8s/edosk2674/crt0_ram.S
|
|
*
|
|
* Yoshinori Sato <ysato@users.sourceforge.jp>
|
|
*
|
|
* Platform depend startup
|
|
* Target Archtecture: generic
|
|
* 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
|
|
|
|
#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 0x00,0x00
|
|
;; 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 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
|
|
|
|
__target_name:
|
|
.asciz "generic"
|
|
|
|
.section .bootvec,"ax"
|
|
jmp @SYMBOL_NAME(_start)
|