1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
| /* 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
|
|
