diff options
Diffstat (limited to 'arch/h8300/platform/h8s/generic/crt0_rom.S')
-rw-r--r-- | arch/h8300/platform/h8s/generic/crt0_rom.S | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/h8300/platform/h8s/generic/crt0_rom.S b/arch/h8300/platform/h8s/generic/crt0_rom.S new file mode 100644 index 000000000000..e18e41202282 --- /dev/null +++ b/arch/h8300/platform/h8s/generic/crt0_rom.S | |||
@@ -0,0 +1,129 @@ | |||
1 | /* | ||
2 | * linux/arch/h8300/platform/h8s/generic/crt0_rom.S | ||
3 | * | ||
4 | * Yoshinori Sato <ysato@users.sourceforge.jp> | ||
5 | * | ||
6 | * Platform depend startup | ||
7 | * Target Archtecture: generic | ||
8 | * Memory Layout : ROM | ||
9 | */ | ||
10 | |||
11 | #define ASSEMBLY | ||
12 | |||
13 | #include <linux/config.h> | ||
14 | #include <asm/linkage.h> | ||
15 | #include <asm/regs267x.h> | ||
16 | |||
17 | .global SYMBOL_NAME(_start) | ||
18 | .global SYMBOL_NAME(_command_line) | ||
19 | .global SYMBOL_NAME(_platform_gpio_table) | ||
20 | .global SYMBOL_NAME(_target_name) | ||
21 | |||
22 | .h8300s | ||
23 | .section .text | ||
24 | .file "crt0_rom.S" | ||
25 | |||
26 | /* CPU Reset entry */ | ||
27 | SYMBOL_NAME_LABEL(_start) | ||
28 | mov.l #__ramend,sp | ||
29 | ldc #0x80,ccr | ||
30 | ldc #0,exr | ||
31 | bclr #4,@INTCR:8 | ||
32 | bset #5,@INTCR:8 /* Interrupt mode 2 */ | ||
33 | |||
34 | /* Peripheral Setup */ | ||
35 | |||
36 | /* copy .data */ | ||
37 | #if !defined(CONFIG_H8S_SIM) | ||
38 | mov.l #__begin_data,er5 | ||
39 | mov.l #__sdata,er6 | ||
40 | mov.l #__edata,er4 | ||
41 | sub.l er6,er4 | ||
42 | shlr.l #2,er4 | ||
43 | 1: | ||
44 | mov.l @er5+,er0 | ||
45 | mov.l er0,@er6 | ||
46 | adds #4,er6 | ||
47 | dec.l #1,er4 | ||
48 | bne 1b | ||
49 | #endif | ||
50 | |||
51 | /* .bss clear */ | ||
52 | mov.l #__sbss,er5 | ||
53 | mov.l #__ebss,er4 | ||
54 | sub.l er5,er4 | ||
55 | shlr.l #2,er4 | ||
56 | sub.l er0,er0 | ||
57 | 1: | ||
58 | mov.l er0,@er5 | ||
59 | adds #4,er5 | ||
60 | dec.l #1,er4 | ||
61 | bne 1b | ||
62 | |||
63 | /* linux kernel start */ | ||
64 | ldc #0x90,ccr /* running kernel */ | ||
65 | mov.l #SYMBOL_NAME(init_thread_union),sp | ||
66 | add.l #0x2000,sp | ||
67 | jsr @_start_kernel | ||
68 | _exit: | ||
69 | |||
70 | jmp _exit | ||
71 | |||
72 | rts | ||
73 | |||
74 | /* I/O port assign information */ | ||
75 | __platform_gpio_table: | ||
76 | mov.l #gpio_table,er0 | ||
77 | rts | ||
78 | |||
79 | gpio_table: | ||
80 | ;; P1DDR | ||
81 | .byte 0x00,0x00 | ||
82 | ;; P2DDR | ||
83 | .byte 0x00,0x00 | ||
84 | ;; P3DDR | ||
85 | .byte 0x00,0x00 | ||
86 | ;; P4DDR | ||
87 | .byte 0x00,0x00 | ||
88 | ;; P5DDR | ||
89 | .byte 0x00,0x00 | ||
90 | ;; P6DDR | ||
91 | .byte 0x00,0x00 | ||
92 | ;; dummy | ||
93 | .byte 0x00,0x00 | ||
94 | ;; P8DDR | ||
95 | .byte 0x00,0x00 | ||
96 | ;; PADDR | ||
97 | .byte 0x00,0x00 | ||
98 | ;; PBDDR | ||
99 | .byte 0x00,0x00 | ||
100 | ;; PCDDR | ||
101 | .byte 0x00,0x00 | ||
102 | ;; PDDDR | ||
103 | .byte 0x00,0x00 | ||
104 | ;; PEDDR | ||
105 | .byte 0x00,0x00 | ||
106 | ;; PFDDR | ||
107 | .byte 0x00,0x00 | ||
108 | ;; PGDDR | ||
109 | .byte 0x00,0x00 | ||
110 | ;; PHDDR | ||
111 | .byte 0x00,0x00 | ||
112 | |||
113 | .section .rodata | ||
114 | __target_name: | ||
115 | .asciz "generic" | ||
116 | |||
117 | .section .bss | ||
118 | __command_line: | ||
119 | .space 512 | ||
120 | |||
121 | /* interrupt vector */ | ||
122 | .section .vectors,"ax" | ||
123 | .long __start | ||
124 | .long __start | ||
125 | vector = 2 | ||
126 | .rept 126-1 | ||
127 | .long _interrupt_redirect_table+vector*4 | ||
128 | vector = vector + 1 | ||
129 | .endr | ||