| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Yoshinori Sato | df2078b | 2015-05-11 02:32:13 +0900 | [diff] [blame] | 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 |