1/*
2 *  linux/arch/h8300/platform/h8300h/aki3068net/crt0_ram.S
3 *
4 *  Yoshinori Sato <ysato@users.sourceforge.jp>
5 *
6 *  Platform depend startup
7 *  Target Archtecture:	AE-3068 (aka. aki3068net)
8 *  Memory Layout     :	RAM
9 */
10
11#define ASSEMBLY
12
13#include <asm/linkage.h>
14
15#if !defined(CONFIG_BLKDEV_RESERVE)
16#if defined(CONFIG_GDB_DEBUG)
17#define RAMEND (__ramend - 0xc000)
18#else
19#define RAMEND __ramend
20#endif
21#else
22#define RAMEND CONFIG_BLKDEV_RESERVE_ADDRESS
23#endif
24
25	.global SYMBOL_NAME(_start)
26	.global SYMBOL_NAME(command_line)
27	.global SYMBOL_NAME(_platform_gpio_table)
28	.global SYMBOL_NAME(_target_name)
29
30	.h8300h
31
32	.section .text
33	.file	"crt0_ram.S"
34
35	/* CPU Reset entry */
36SYMBOL_NAME_LABEL(_start)
37	mov.l	#RAMEND,sp
38	ldc	#0x80,ccr
39
40	/* Peripheral Setup */
41
42#if defined(CONFIG_MTD_UCLINUX)
43	/* move romfs image */
44	jsr	@__move_romfs
45#endif
46
47	/* .bss clear */
48	mov.l	#__sbss,er5
49	mov.l	#__ebss,er4
50	sub.l	er5,er4
51	shlr	er4
52	shlr	er4
53	sub.l	er0,er0
541:
55	mov.l	er0,@er5
56	adds	#4,er5
57	dec.l	#1,er4
58	bne	1b
59
60	/* copy kernel commandline */
61	mov.l	#COMMAND_START,er5
62	mov.l	#SYMBOL_NAME(command_line),er6
63	mov.w	#512,r4
64	eepmov.w
65
66	/* uClinux kernel start */
67	ldc	#0x90,ccr	/* running kernel */
68	mov.l	#SYMBOL_NAME(init_thread_union),sp
69	add.l	#0x2000,sp
70	jsr	@_start_kernel
71_exit:
72
73	jmp	_exit
74
75	rts
76
77	/* I/O port assign information */
78__platform_gpio_table:
79	mov.l	#gpio_table,er0
80	rts
81
82gpio_table:
83	;; P1DDR
84	.byte	0xff,0xff
85	;; P2DDR
86	.byte	0xff,0xff
87	;; P3DDR
88	.byte	0xff,0x00
89	;; P4DDR
90	.byte	0x00,0x00
91	;; P5DDR
92	.byte	0x01,0x01
93	;; P6DDR
94	.byte	0x00,0x00
95	;; dummy
96	.byte	0x00,0x00
97	;; P8DDR
98	.byte	0x0c,0x0c
99	;; P9DDR
100	.byte	0x00,0x00
101	;; PADDR
102	.byte	0x00,0x00
103	;; PBDDR
104	.byte	0x30,0x30
105
106__target_name:
107	.asciz	"AE-3068"
108
109	.section .bootvec,"ax"
110	jmp	@SYMBOL_NAME(_start)
111