projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| df2078b8 YS |
2 | |
| 3 | #include <linux/sys.h> | |
| 4 | #include <linux/init.h> | |
| 5 | #include <asm/unistd.h> | |
| 6 | #include <asm/setup.h> | |
| 7 | #include <asm/segment.h> | |
| 8 | #include <asm/linkage.h> | |
| 9 | #include <asm/asm-offsets.h> | |
| 10 | #include <asm/thread_info.h> | |
| 11 | #include <asm/errno.h> | |
| 12 | ||
| 13 | #if defined(CONFIG_CPU_H8300H) | |
| 14 | .h8300h | |
| 15 | #define SYSCR 0xfee012 | |
| 16 | #define IRAMTOP 0xffff20 | |
| 17 | #endif | |
| 18 | #if defined(CONFIG_CPU_H8S) | |
| 19 | .h8300s | |
| 20 | #define INTCR 0xffff31 | |
| 21 | #define IRAMTOP 0xffc000 | |
| 22 | #endif | |
| 23 | ||
| 24 | __HEAD | |
| 25 | .global _start | |
| 26 | _start: | |
| 27 | mov.l #IRAMTOP,sp | |
| 28 | /* .bss clear */ | |
| 29 | mov.l #_sbss,er5 | |
| 30 | mov.l #_ebss,er4 | |
| 31 | sub.l er5,er4 | |
| 32 | shlr er4 | |
| 33 | shlr er4 | |
| 34 | sub.l er2,er2 | |
| 35 | 1: | |
| 36 | mov.l er2,@er5 | |
| 37 | adds #4,er5 | |
| 38 | dec.l #1,er4 | |
| 39 | bne 1b | |
| 40 | jsr @h8300_fdt_init | |
| 41 | ||
| 42 | /* linux kernel start */ | |
| 43 | #if defined(CONFIG_CPU_H8300H) | |
| 44 | ldc #0xd0,ccr /* running kernel */ | |
| 45 | mov.l #SYSCR,er0 | |
| 46 | bclr #3,@er0 | |
| 47 | #endif | |
| 48 | #if defined(CONFIG_CPU_H8S) | |
| 49 | ldc #0x07,exr | |
| 50 | bclr #4,@INTCR:8 | |
| 51 | bset #5,@INTCR:8 /* Interrupt mode 2 */ | |
| 52 | ldc #0x90,ccr /* running kernel */ | |
| 53 | #endif | |
| 54 | mov.l #init_thread_union,sp | |
| 55 | add.l #0x2000,sp | |
| 56 | jsr @start_kernel | |
| 57 | ||
| 58 | 1: | |
| 59 | bra 1b | |
| 60 | ||
| 61 | .end |