1 files changed, 141 insertions, 0 deletions
diff --git a/arch/m68k/platform/68328/head-ram.S b/arch/m68k/platform/68328/head-ram.S
new file mode 100644
index 0000000..7f1aeea
--- /dev/null
+++ b/arch/m68k/platform/68328/head-ram.S
@@ -0,0 +1,141 @@
+
+	.global __main
+	.global __rom_start
+
+        .global _rambase
+        .global _ramstart
+	
+	.global splash_bits
+	.global _start
+	.global _stext
+	.global _edata
+
+#define DEBUG
+#define ROM_OFFSET 0x10C00000
+#define STACK_GAURD 0x10
+
+	.text
+	
+_start:
+_stext:
+	movew	#0x2700, %sr            /* Exceptions off! */
+
+#if 0
+	/* Init chip registers.  uCsimm specific */
+	moveb	#0x00,   0xfffffb0b	/* Watchdog off */
+	moveb	#0x10,   0xfffff000	/* SCR */
+
+	movew   #0x2400, 0xfffff200	/* PLLCR */
+	movew   #0x0123, 0xfffff202	/* PLLFSR */
+
+	moveb	#0x00,   0xfffff40b	/* enable chip select */
+	moveb	#0x00,   0xfffff423	/* enable /DWE */
+	moveb	#0x08,   0xfffffd0d	/* disable hardmap */
+	moveb	#0x07,   0xfffffd0e	/* level 7 interrupt clear */
+
+	movew	#0x8600, 0xfffff100	/* FLASH at 0x10c00000 */
+	movew	#0x018b, 0xfffff110	/* 2Meg, enable, 0ws */
+
+	movew	#0x8f00, 0xfffffc00	/* DRAM configuration */
+	movew	#0x9667, 0xfffffc02	/* DRAM control */
+	movew	#0x0000, 0xfffff106	/* DRAM at 0x00000000 */
+	movew	#0x068f, 0xfffff116	/* 8Meg, enable, 0ws */
+
+	moveb	#0x40,   0xfffff300	/* IVR */
+	movel	#0x007FFFFF, %d0	/* IMR */
+	movel	%d0,     0xfffff304
+
+	moveb	0xfffff42b, %d0
+	andb	#0xe0,	 %d0
+	moveb	%d0,	 0xfffff42b
+
+	moveb	#0x08,   0xfffff907	/* Ignore CTS */
+	movew	#0x010b, 0xfffff902	/* BAUD to 9600 */
+	movew	#0xe100, 0xfffff900	/* enable */
+#endif
+
+	movew	#16384, %d0  /* PLL settle wait loop */
+L0:
+	subw	#1, %d0
+	bne	L0
+#ifdef DEBUG
+	moveq	#70, %d7		/* 'F' */
+	moveb	%d7,0xfffff907          /* No absolute addresses */
+pclp1:
+	movew	0xfffff906, %d7
+	andw	#0x2000, %d7
+	beq	pclp1
+#endif /* DEBUG */
+
+#ifdef DEBUG
+	moveq	#82, %d7		/* 'R' */
+	moveb	%d7,0xfffff907          /* No absolute addresses */
+pclp3:
+	movew	0xfffff906, %d7
+	andw	#0x2000, %d7
+	beq	pclp3
+#endif /* DEBUG */
+	moveal	#0x007ffff0, %ssp
+	moveal	#_sbss, %a0
+	moveal	#_ebss, %a1
+
+	/* Copy 0 to %a0 until %a0 >= %a1 */
+L1:
+	movel	#0, %a0@+
+	cmpal	%a0, %a1
+	bhi	L1
+
+#ifdef DEBUG
+	moveq	#67, %d7                /* 'C' */
+	jsr	putc
+#endif /* DEBUG */
+
+	pea	0
+	pea	env
+	pea	%sp@(4)
+	pea	0
+
+#ifdef DEBUG
+	moveq	#70, %d7		/* 'F' */
+	jsr	putc
+#endif /* DEBUG */
+
+lp:
+	jsr	start_kernel
+        jmp lp
+_exit:
+
+	jmp	_exit
+
+__main:
+	/* nothing */
+	rts
+
+#ifdef DEBUG
+putc:
+	moveb	%d7,0xfffff907
+pclp:
+	movew	0xfffff906, %d7
+	andw	#0x2000, %d7
+	beq	pclp
+	rts
+#endif /* DEBUG */
+
+	.data
+
+/*
+ *      Set up the usable of RAM stuff. Size of RAM is determined then
+ *      an initial stack set up at the end.
+ */
+.align 4
+_ramvec:
+.long   0
+_rambase:
+.long   0
+_ramstart:
+.long   0
+_ramend:
+.long   0
+
+env:
+	.long	0