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/* SPDX-License-Identifier: GPL-2.0 */
#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
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