1 files changed, 187 insertions, 0 deletions
diff --git a/arch/h8300/platform/h8s/edosk2674/crt0_rom.S b/arch/h8300/platform/h8s/edosk2674/crt0_rom.S
new file mode 100644
index 00000000000..65748bf1855
--- /dev/null
+++ b/arch/h8300/platform/h8s/edosk2674/crt0_rom.S
@@ -0,0 +1,187 @@
+/*
+ *  linux/arch/h8300/platform/h8s/edosk2674/crt0_rom.S
+ *
+ *  Yoshinori Sato <ysato@users.sourceforge.jp>
+ *
+ *  Platform depend startup
+ *  Target Archtecture:	EDOSK-2674
+ *  Memory Layout     :	ROM
+ */
+
+#define ASSEMBLY
+
+#include <linux/config.h>
+#include <asm/linkage.h>
+#include <asm/regs267x.h>
+		
+	.global SYMBOL_NAME(_start)
+	.global SYMBOL_NAME(_command_line)
+	.global SYMBOL_NAME(_platform_gpio_table)
+	.global SYMBOL_NAME(_target_name)
+	
+	.h8300s
+	.section .text
+	.file	"crt0_rom.S"
+
+	/* CPU Reset entry */
+SYMBOL_NAME_LABEL(_start)
+	mov.l	#__ramend,sp
+	ldc	#0x80,ccr
+	ldc	#0,exr
+	
+	/* Peripheral Setup */
+;BSC/GPIO setup
+	mov.l	#init_regs,er0
+	mov.w	#0xffff,e2
+1:
+	mov.w	@er0+,r2
+	beq	2f
+	mov.w	@er0+,r1
+	mov.b	r1l,@er2
+	bra	1b
+
+2:
+;SDRAM setup
+#define SDRAM_SMR 0x400040
+
+	mov.b	#0,r0l
+	mov.b	r0l,@DRACCR:16
+	mov.w	#0x188,r0
+	mov.w	r0,@REFCR:16
+	mov.w	#0x85b4,r0
+	mov.w	r0,@DRAMCR:16
+	mov.b	#0,r1l
+	mov.b	r1l,@SDRAM_SMR
+	mov.w	#0x84b4,r0
+	mov.w	r0,@DRAMCR:16
+;special thanks to Arizona Cooperative Power
+	
+	/* copy .data */
+	mov.l	#__begin_data,er5
+	mov.l	#__sdata,er6
+	mov.l	#__edata,er4
+	sub.l	er6,er4
+	shlr.l	#2,er4
+1:	
+	mov.l	@er5+,er0
+	mov.l	er0,@er6
+	adds	#4,er6
+	dec.l	#1,er4
+	bne	1b	
+
+	/* .bss clear */
+	mov.l	#__sbss,er5
+	mov.l	#__ebss,er4
+	sub.l	er5,er4
+	shlr.l	#2,er4		
+	sub.l	er0,er0
+1:
+	mov.l	er0,@er5
+	adds	#4,er5
+	dec.l	#1,er4
+	bne	1b
+
+	/* copy kernel commandline */
+	mov.l	#COMMAND_START,er5
+	mov.l	#SYMBOL_NAME(_command_line),er6
+	mov.w	#512,r4
+	eepmov.w
+
+	/* linux kernel start */
+	ldc	#0x90,ccr	/* running kernel */
+	mov.l	#SYMBOL_NAME(init_thread_union),sp
+	add.l	#0x2000,sp
+	jsr	@_start_kernel
+_exit:
+
+	jmp	_exit
+
+	rts
+
+	/* I/O port assign information */
+__platform_gpio_table:	
+	mov.l	#gpio_table,er0
+	rts
+
+#define INIT_REGS_DATA(REGS,DATA) \
+	.word	((REGS) & 0xffff),DATA
+
+init_regs:
+INIT_REGS_DATA(ASTCR,0xff)
+INIT_REGS_DATA(RDNCR,0x00)
+INIT_REGS_DATA(ABWCR,0x80)
+INIT_REGS_DATA(WTCRAH,0x27)
+INIT_REGS_DATA(WTCRAL,0x77)
+INIT_REGS_DATA(WTCRBH,0x71)
+INIT_REGS_DATA(WTCRBL,0x22)
+INIT_REGS_DATA(CSACRH,0x80)
+INIT_REGS_DATA(CSACRL,0x80)
+INIT_REGS_DATA(BROMCRH,0xa0)
+INIT_REGS_DATA(BROMCRL,0xa0)
+INIT_REGS_DATA(P3DDR,0x3a)
+INIT_REGS_DATA(P3ODR,0x06)
+INIT_REGS_DATA(PADDR,0xff)
+INIT_REGS_DATA(PFDDR,0xfe)
+INIT_REGS_DATA(PGDDR,0x0f)
+INIT_REGS_DATA(PHDDR,0x0f)
+INIT_REGS_DATA(PFCR0,0xff)
+INIT_REGS_DATA(PFCR2,0x0d)
+INIT_REGS_DATA(ITSR, 0x00)
+INIT_REGS_DATA(ITSR+1,0x3f)
+INIT_REGS_DATA(INTCR,0x20)
+		
+	.word	0
+
+gpio_table:
+	;; P1DDR
+	.byte	0x00,0x00
+	;; P2DDR
+	.byte	0x00,0x00
+	;; P3DDR
+	.byte	0x00,0x00
+	;; dummy
+	.byte	0x00,0x00
+	;; P5DDR
+	.byte	0x00,0x00
+	;; P6DDR
+	.byte	0x00,0x00
+	;; P7DDR
+	.byte	0x00,0x00
+	;; P8DDR
+	.byte	0x00,0x00
+	;; dummy
+	.byte	0x00,0x00
+	;; PADDR
+	.byte	0x00,0x00
+	;; PBDDR
+	.byte	0x00,0x00
+	;; PCDDR
+	.byte	0x00,0x00
+	;; PDDDR
+	.byte	0x00,0x00
+	;; PEDDR
+	.byte	0x00,0x00
+	;; PFDDR
+	.byte	0x00,0x00
+	;; PGDDR
+	.byte	0x00,0x00
+	;; PHDDR
+	.byte	0x00,0x00
+
+	.section .rodata
+__target_name:	
+	.asciz	"EDOSK-2674"
+	
+	.section .bss
+__command_line:	
+	.space	512
+
+	/* interrupt vector */
+	.section .vectors,"ax"
+	.long	__start
+	.long	__start
+vector	=	2
+	.rept	126
+	.long	_interrupt_redirect_table+vector*4
+vector	=	vector + 1
+	.endr