1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun#include <linux/sys.h> 4*4882a593Smuzhiyun#include <linux/init.h> 5*4882a593Smuzhiyun#include <asm/unistd.h> 6*4882a593Smuzhiyun#include <asm/setup.h> 7*4882a593Smuzhiyun#include <asm/segment.h> 8*4882a593Smuzhiyun#include <asm/linkage.h> 9*4882a593Smuzhiyun#include <asm/asm-offsets.h> 10*4882a593Smuzhiyun#include <asm/thread_info.h> 11*4882a593Smuzhiyun#include <asm/errno.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8300H) 14*4882a593Smuzhiyun .h8300h 15*4882a593Smuzhiyun#define SYSCR 0xfee012 16*4882a593Smuzhiyun#define IRAMTOP 0xffff20 17*4882a593Smuzhiyun#endif 18*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8S) 19*4882a593Smuzhiyun .h8300s 20*4882a593Smuzhiyun#define INTCR 0xffff31 21*4882a593Smuzhiyun#define IRAMTOP 0xffc000 22*4882a593Smuzhiyun#endif 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun __HEAD 25*4882a593Smuzhiyun .global _start 26*4882a593Smuzhiyun_start: 27*4882a593Smuzhiyun mov.l #IRAMTOP,sp 28*4882a593Smuzhiyun /* .bss clear */ 29*4882a593Smuzhiyun mov.l #_sbss,er5 30*4882a593Smuzhiyun mov.l #_ebss,er4 31*4882a593Smuzhiyun sub.l er5,er4 32*4882a593Smuzhiyun shlr er4 33*4882a593Smuzhiyun shlr er4 34*4882a593Smuzhiyun sub.l er2,er2 35*4882a593Smuzhiyun1: 36*4882a593Smuzhiyun mov.l er2,@er5 37*4882a593Smuzhiyun adds #4,er5 38*4882a593Smuzhiyun dec.l #1,er4 39*4882a593Smuzhiyun bne 1b 40*4882a593Smuzhiyun jsr @h8300_fdt_init 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* linux kernel start */ 43*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8300H) 44*4882a593Smuzhiyun ldc #0xd0,ccr /* running kernel */ 45*4882a593Smuzhiyun mov.l #SYSCR,er0 46*4882a593Smuzhiyun bclr #3,@er0 47*4882a593Smuzhiyun#endif 48*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8S) 49*4882a593Smuzhiyun ldc #0x07,exr 50*4882a593Smuzhiyun bclr #4,@INTCR:8 51*4882a593Smuzhiyun bset #5,@INTCR:8 /* Interrupt mode 2 */ 52*4882a593Smuzhiyun ldc #0x90,ccr /* running kernel */ 53*4882a593Smuzhiyun#endif 54*4882a593Smuzhiyun mov.l #init_thread_union,sp 55*4882a593Smuzhiyun add.l #0x2000,sp 56*4882a593Smuzhiyun jsr @start_kernel 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun1: 59*4882a593Smuzhiyun bra 1b 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun .end 62