forked from Minki/linux
61 lines
1008 B
ArmAsm
61 lines
1008 B
ArmAsm
|
|
#include <linux/sys.h>
|
|
#include <linux/init.h>
|
|
#include <asm/unistd.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/linkage.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/errno.h>
|
|
|
|
#if defined(CONFIG_CPU_H8300H)
|
|
.h8300h
|
|
#define SYSCR 0xfee012
|
|
#define IRAMTOP 0xffff20
|
|
#endif
|
|
#if defined(CONFIG_CPU_H8S)
|
|
.h8300s
|
|
#define INTCR 0xffff31
|
|
#define IRAMTOP 0xffc000
|
|
#endif
|
|
|
|
__HEAD
|
|
.global _start
|
|
_start:
|
|
mov.l #IRAMTOP,sp
|
|
/* .bss clear */
|
|
mov.l #_sbss,er5
|
|
mov.l #_ebss,er4
|
|
sub.l er5,er4
|
|
shlr er4
|
|
shlr er4
|
|
sub.l er2,er2
|
|
1:
|
|
mov.l er2,@er5
|
|
adds #4,er5
|
|
dec.l #1,er4
|
|
bne 1b
|
|
jsr @h8300_fdt_init
|
|
|
|
/* linux kernel start */
|
|
#if defined(CONFIG_CPU_H8300H)
|
|
ldc #0xd0,ccr /* running kernel */
|
|
mov.l #SYSCR,er0
|
|
bclr #3,@er0
|
|
#endif
|
|
#if defined(CONFIG_CPU_H8S)
|
|
ldc #0x07,exr
|
|
bclr #4,@INTCR:8
|
|
bset #5,@INTCR:8 /* Interrupt mode 2 */
|
|
ldc #0x90,ccr /* running kernel */
|
|
#endif
|
|
mov.l #init_thread_union,sp
|
|
add.l #0x2000,sp
|
|
jsr @start_kernel
|
|
|
|
1:
|
|
bra 1b
|
|
|
|
.end
|