diff options
Diffstat (limited to 'arch/h8300/platform/h8300h/h8max/crt0_ram.S')
-rw-r--r-- | arch/h8300/platform/h8300h/h8max/crt0_ram.S | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/h8300/platform/h8300h/h8max/crt0_ram.S b/arch/h8300/platform/h8300h/h8max/crt0_ram.S new file mode 100644 index 000000000000..a5c5a9156e04 --- /dev/null +++ b/arch/h8300/platform/h8300h/h8max/crt0_ram.S | |||
@@ -0,0 +1,111 @@ | |||
1 | /* | ||
2 | * linux/arch/h8300/platform/h8300h/h8max/crt0_ram.S | ||
3 | * | ||
4 | * Yoshinori Sato <ysato@users.sourceforge.jp> | ||
5 | * | ||
6 | * Platform depend startup | ||
7 | * Target Archtecture: H8MAX | ||
8 | * Memory Layout : RAM | ||
9 | */ | ||
10 | |||
11 | #define ASSEMBLY | ||
12 | |||
13 | #include <linux/config.h> | ||
14 | #include <asm/linkage.h> | ||
15 | |||
16 | #if !defined(CONFIG_BLKDEV_RESERVE) | ||
17 | #if defined(CONFIG_GDB_DEBUG) | ||
18 | #define RAMEND (__ramend - 0xc000) | ||
19 | #else | ||
20 | #define RAMEND __ramend | ||
21 | #endif | ||
22 | #else | ||
23 | #define RAMEND CONFIG_BLKDEV_RESERVE_ADDRESS | ||
24 | #endif | ||
25 | |||
26 | .global SYMBOL_NAME(_start) | ||
27 | .global SYMBOL_NAME(command_line) | ||
28 | .global SYMBOL_NAME(_platform_gpio_table) | ||
29 | .global SYMBOL_NAME(_target_name) | ||
30 | |||
31 | .h8300h | ||
32 | |||
33 | .section .text | ||
34 | .file "crt0_ram.S" | ||
35 | |||
36 | /* CPU Reset entry */ | ||
37 | SYMBOL_NAME_LABEL(_start) | ||
38 | mov.l #RAMEND,sp | ||
39 | ldc #0x80,ccr | ||
40 | |||
41 | /* Peripheral Setup */ | ||
42 | |||
43 | #if defined(CONFIG_MTD_UCLINUX) | ||
44 | /* move romfs image */ | ||
45 | jsr @__move_romfs | ||
46 | #endif | ||
47 | |||
48 | /* .bss clear */ | ||
49 | mov.l #__sbss,er5 | ||
50 | mov.l #__ebss,er4 | ||
51 | sub.l er5,er4 | ||
52 | shlr er4 | ||
53 | shlr er4 | ||
54 | sub.l er0,er0 | ||
55 | 1: | ||
56 | mov.l er0,@er5 | ||
57 | adds #4,er5 | ||
58 | dec.l #1,er4 | ||
59 | bne 1b | ||
60 | |||
61 | /* copy kernel commandline */ | ||
62 | mov.l #COMMAND_START,er5 | ||
63 | mov.l #SYMBOL_NAME(command_line),er6 | ||
64 | mov.w #512,r4 | ||
65 | eepmov.w | ||
66 | |||
67 | /* uClinux kernel start */ | ||
68 | ldc #0x90,ccr /* running kernel */ | ||
69 | mov.l #SYMBOL_NAME(init_thread_union),sp | ||
70 | add.l #0x2000,sp | ||
71 | jsr @_start_kernel | ||
72 | _exit: | ||
73 | |||
74 | jmp _exit | ||
75 | |||
76 | rts | ||
77 | |||
78 | /* I/O port assign information */ | ||
79 | __platform_gpio_table: | ||
80 | mov.l #gpio_table,er0 | ||
81 | rts | ||
82 | |||
83 | gpio_table: | ||
84 | ;; P1DDR | ||
85 | .byte 0xff,0xff | ||
86 | ;; P2DDR | ||
87 | .byte 0xff,0xff | ||
88 | ;; P3DDR | ||
89 | .byte 0x00,0x00 | ||
90 | ;; P4DDR | ||
91 | .byte 0x00,0x00 | ||
92 | ;; P5DDR | ||
93 | .byte 0x01,0x01 | ||
94 | ;; P6DDR | ||
95 | .byte 0xf6,0xf6 | ||
96 | ;; dummy | ||
97 | .byte 0x00,0x00 | ||
98 | ;; P8DDR | ||
99 | .byte 0xee,0xee | ||
100 | ;; P9DDR | ||
101 | .byte 0x00,0x00 | ||
102 | ;; PADDR | ||
103 | .byte 0x00,0x00 | ||
104 | ;; PBDDR | ||
105 | .byte 0x30,0x30 | ||
106 | |||
107 | __target_name: | ||
108 | .asciz "H8MAX" | ||
109 | |||
110 | .section .bootvec,"ax" | ||
111 | jmp @SYMBOL_NAME(_start) | ||