mn10300: add the MN10300/AM33 architecture to the kernel

Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.

This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305.  The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.

[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 564 insertions, 0 deletions

diff --git a/arch/mn10300/boot/compressed/Makefile b/arch/mn10300/boot/compressed/Makefile
new file mode 100644
index 00000000000..08a95e17168
--- /dev/null
+++ b/arch/mn10300/boot/compressed/Makefile
@@ -0,0 +1,22 @@
+#
+# Create a compressed vmlinux image from the original vmlinux
+#
+
+targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
+
+LDFLAGS_vmlinux := -Ttext $(CONFIG_KERNEL_ZIMAGE_BASE_ADDRESS) -e startup_32
+
+$(obj)/vmlinux: $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
+	$(call if_changed,ld)
+	@:
+
+$(obj)/vmlinux.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
+
+$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
+	$(call if_changed,gzip)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-am33lin -T
+
+$(obj)/piggy.o: $(obj)/vmlinux.lds $(obj)/vmlinux.bin.gz FORCE
+	$(call if_changed,ld)
diff --git a/arch/mn10300/boot/compressed/head.S b/arch/mn10300/boot/compressed/head.S
new file mode 100644
index 00000000000..502e1eb5670
--- /dev/null
+++ b/arch/mn10300/boot/compressed/head.S
@@ -0,0 +1,86 @@
+/* Boot entry point for a compressed MN10300 kernel
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+	.section	.text
+
+#define DEBUG
+
+#include <linux/linkage.h>
+#include <asm/cpu-regs.h>
+
+	.globl startup_32
+startup_32:
+	# first save off parameters from bootloader
+	mov	param_save_area,a0
+	mov	d0,(a0)
+	mov	d1,(4,a0)
+	mov	d2,(8,a0)
+
+	mov	sp,a3
+	mov	decomp_stack+0x2000-4,a0
+	mov	a0,sp
+
+	# invalidate and enable both of the caches
+	mov	CHCTR,a0
+	clr	d0
+	movhu	d0,(a0)					# turn off first
+	mov	CHCTR_ICINV|CHCTR_DCINV,d0
+	movhu	d0,(a0)
+	setlb
+	mov	(a0),d0
+	btst	CHCTR_ICBUSY|CHCTR_DCBUSY,d0		# wait till not busy
+	lne
+	mov	CHCTR_ICEN|CHCTR_DCEN|CHCTR_DCWTMD,d0	# writethru dcache
+	movhu	d0,(a0)					# enable
+
+	# clear the BSS area
+	mov	__bss_start,a0
+	mov	_end,a1
+	clr	d0
+bssclear:
+	cmp	a1,a0
+	bge	bssclear_end
+	movbu	d0,(a0)
+	inc	a0
+	bra	bssclear
+bssclear_end:
+
+	# decompress the kernel
+	call	decompress_kernel[],0
+
+	# disable caches again
+	mov	CHCTR,a0
+	clr	d0
+	movhu	d0,(a0)
+	setlb
+	mov	(a0),d0
+	btst	CHCTR_ICBUSY|CHCTR_DCBUSY,d0		# wait till not busy
+	lne
+
+	mov	param_save_area,a0
+	mov	(a0),d0
+	mov	(4,a0),d1
+	mov	(8,a0),d2
+
+	mov	a3,sp
+	mov	CONFIG_KERNEL_TEXT_ADDRESS,a0
+	jmp	(a0)
+
+	.data
+	.align		4
+param_save_area:
+	.rept 3
+	.word		0
+	.endr
+
+	.section	.bss
+	.align		4
+decomp_stack:
+	.space		0x2000
diff --git a/arch/mn10300/boot/compressed/misc.c b/arch/mn10300/boot/compressed/misc.c
new file mode 100644
index 00000000000..ded207efc97
--- /dev/null
+++ b/arch/mn10300/boot/compressed/misc.c
@@ -0,0 +1,429 @@
+/* MN10300 Miscellaneous helper routines for kernel decompressor
+ *
+ * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Modified by David Howells (dhowells@redhat.com)
+ * - Derived from arch/x86/boot/compressed/misc_32.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/compiler.h>
+#include <asm/serial-regs.h>
+#include "misc.h"
+
+#ifndef CONFIG_GDBSTUB_ON_TTYSx
+/* display 'Uncompressing Linux... ' messages on ttyS0 or ttyS1 */
+#if 1	/* ttyS0 */
+#define CYG_DEV_BASE	0xA6FB0000
+#else   /* ttyS1 */
+#define CYG_DEV_BASE	0xA6FC0000
+#endif
+
+#define CYG_DEV_THR	(*((volatile __u8*)(CYG_DEV_BASE + 0x00)))
+#define CYG_DEV_MCR	(*((volatile __u8*)(CYG_DEV_BASE + 0x10)))
+#define SIO_MCR_DTR	0x01
+#define SIO_MCR_RTS	0x02
+#define CYG_DEV_LSR	(*((volatile __u8*)(CYG_DEV_BASE + 0x14)))
+#define SIO_LSR_THRE	0x20		/* transmitter holding register empty */
+#define SIO_LSR_TEMT	0x40		/* transmitter register empty */
+#define CYG_DEV_MSR	(*((volatile __u8*)(CYG_DEV_BASE + 0x18)))
+#define SIO_MSR_CTS	0x10		/* clear to send */
+#define SIO_MSR_DSR	0x20		/* data set ready */
+
+#define LSR_WAIT_FOR(STATE) \
+	do { while (!(CYG_DEV_LSR & SIO_LSR_##STATE)) {} } while (0)
+#define FLOWCTL_QUERY(LINE) \
+	({ CYG_DEV_MSR & SIO_MSR_##LINE; })
+#define FLOWCTL_WAIT_FOR(LINE) \
+	do { while (!(CYG_DEV_MSR & SIO_MSR_##LINE)) {} } while (0)
+#define FLOWCTL_CLEAR(LINE) \
+	do { CYG_DEV_MCR &= ~SIO_MCR_##LINE; } while (0)
+#define FLOWCTL_SET(LINE) \
+	do { CYG_DEV_MCR |= SIO_MCR_##LINE; } while (0)
+#endif
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args)  args
+#define STATIC static
+
+#undef memset
+#undef memcpy
+
+static inline void *memset(const void *s, int c, size_t n)
+{
+	int i;
+	char *ss = (char *) s;
+
+	for (i = 0; i < n; i++)
+		ss[i] = c;
+	return (void *)s;
+}
+
+#define memzero(s, n) memset((s), 0, (n))
+
+static inline void *memcpy(void *__dest, const void *__src, size_t __n)
+{
+	int i;
+	const char *s = __src;
+	char *d = __dest;
+
+	for (i = 0; i < __n; i++)
+		d[i] = s[i];
+	return __dest;
+}
+
+typedef unsigned char  uch;
+typedef unsigned short ush;
+typedef unsigned long  ulg;
+
+#define WSIZE 0x8000	/* Window size must be at least 32k, and a power of
+			 * two */
+
+static uch *inbuf;	/* input buffer */
+static uch window[WSIZE]; /* sliding window buffer */
+
+static unsigned insize;	/* valid bytes in inbuf */
+static unsigned inptr;	/* index of next byte to be processed in inbuf */
+static unsigned outcnt;	/* bytes in output buffer */
+
+/* gzip flag byte */
+#define ASCII_FLAG   0x01 /* bit 0 set: file probably ASCII text */
+#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
+#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
+#define COMMENT      0x10 /* bit 4 set: file comment present */
+#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */
+#define RESERVED     0xC0 /* bit 6,7:   reserved */
+
+/* Diagnostic functions */
+#ifdef DEBUG
+#  define Assert(cond, msg) { if (!(cond)) error(msg); }
+#  define Trace(x)	fprintf x
+#  define Tracev(x)	{ if (verbose) fprintf x ; }
+#  define Tracevv(x)	{ if (verbose > 1) fprintf x ; }
+#  define Tracec(c, x)	{ if (verbose && (c)) fprintf x ; }
+#  define Tracecv(c, x)	{ if (verbose > 1 && (c)) fprintf x ; }
+#else
+#  define Assert(cond, msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c, x)
+#  define Tracecv(c, x)
+#endif
+
+static int  fill_inbuf(void);
+static void flush_window(void);
+static void error(const char *) __attribute__((noreturn));
+static void kputs(const char *);
+
+static inline unsigned char get_byte(void)
+{
+	unsigned char ch = inptr < insize ? inbuf[inptr++] : fill_inbuf();
+
+#if 0
+	char hex[3];
+	hex[0] = ((ch & 0x0f) > 9) ?
+		((ch & 0x0f) + 'A' - 0xa) : ((ch & 0x0f) + '0');
+	hex[1] = ((ch >> 4) > 9) ?
+		((ch >> 4) + 'A' - 0xa) : ((ch >> 4) + '0');
+	hex[2] = 0;
+	kputs(hex);
+#endif
+	return ch;
+}
+
+/*
+ * This is set up by the setup-routine at boot-time
+ */
+#define EXT_MEM_K (*(unsigned short *)0x90002)
+#ifndef STANDARD_MEMORY_BIOS_CALL
+#define ALT_MEM_K (*(unsigned long *) 0x901e0)
+#endif
+#define SCREEN_INFO (*(struct screen_info *)0x90000)
+
+static long bytes_out;
+static uch *output_data;
+static unsigned long output_ptr;
+
+
+static void *malloc(int size);
+
+static inline void free(void *where)
+{	/* Don't care */
+}
+
+static unsigned long free_mem_ptr = (unsigned long) &end;
+static unsigned long free_mem_end_ptr = (unsigned long) &end + 0x90000;
+
+static inline void gzip_mark(void **ptr)
+{
+	kputs(".");
+	*ptr = (void *) free_mem_ptr;
+}
+
+static inline void gzip_release(void **ptr)
+{
+	free_mem_ptr = (unsigned long) *ptr;
+}
+
+#define INPLACE_MOVE_ROUTINE	0x1000
+#define LOW_BUFFER_START	0x2000
+#define LOW_BUFFER_END		0x90000
+#define LOW_BUFFER_SIZE		(LOW_BUFFER_END - LOW_BUFFER_START)
+#define HEAP_SIZE		0x3000
+static int high_loaded;
+static uch *high_buffer_start /* = (uch *)(((ulg)&end) + HEAP_SIZE)*/;
+
+static char *vidmem = (char *)0xb8000;
+static int lines, cols;
+
+#include "../../../../lib/inflate.c"
+
+static void *malloc(int size)
+{
+	void *p;
+
+	if (size < 0)
+		error("Malloc error\n");
+	if (!free_mem_ptr)
+		error("Memory error\n");
+
+	free_mem_ptr = (free_mem_ptr + 3) & ~3;	/* Align */
+
+	p = (void *) free_mem_ptr;
+	free_mem_ptr += size;
+
+	if (free_mem_ptr >= free_mem_end_ptr)
+		error("\nOut of memory\n");
+
+	return p;
+}
+
+static inline void scroll(void)
+{
+	int i;
+
+	memcpy(vidmem, vidmem + cols * 2, (lines - 1) * cols * 2);
+	for (i = (lines - 1) * cols * 2; i < lines * cols * 2; i += 2)
+		vidmem[i] = ' ';
+}
+
+static inline void kputchar(unsigned char ch)
+{
+#ifdef CONFIG_MN10300_UNIT_ASB2305
+	while (SC0STR & SC01STR_TBF)
+		continue;
+
+	if (ch == 0x0a) {
+		SC0TXB = 0x0d;
+		while (SC0STR & SC01STR_TBF)
+			continue;
+	}
+
+	SC0TXB = ch;
+
+#else
+	while (SC1STR & SC01STR_TBF)
+		continue;
+
+	if (ch == 0x0a) {
+		SC1TXB = 0x0d;
+		while (SC1STR & SC01STR_TBF)
+			continue;
+	}
+
+	SC1TXB = ch;
+
+#endif
+}
+
+static void kputs(const char *s)
+{
+#ifdef CONFIG_DEBUG_DECOMPRESS_KERNEL
+#ifndef CONFIG_GDBSTUB_ON_TTYSx
+	char ch;
+
+	FLOWCTL_SET(DTR);
+
+	while (*s) {
+		LSR_WAIT_FOR(THRE);
+
+		ch = *s++;
+		if (ch == 0x0a) {
+			CYG_DEV_THR = 0x0d;
+			LSR_WAIT_FOR(THRE);
+		}
+		CYG_DEV_THR = ch;
+	}
+
+	FLOWCTL_CLEAR(DTR);
+#else
+
+	for (; *s; s++)
+		kputchar(*s);
+
+#endif
+#endif /* CONFIG_DEBUG_DECOMPRESS_KERNEL */
+}
+
+/* ===========================================================================
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ */
+static int fill_inbuf()
+{
+	if (insize != 0)
+		error("ran out of input data\n");
+
+	inbuf = input_data;
+	insize = input_len;
+	inptr = 1;
+	return inbuf[0];
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void flush_window_low(void)
+{
+    ulg c = crc;         /* temporary variable */
+    unsigned n;
+    uch *in, *out, ch;
+
+    in = window;
+    out = &output_data[output_ptr];
+    for (n = 0; n < outcnt; n++) {
+	    ch = *out++ = *in++;
+	    c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+    }
+    crc = c;
+    bytes_out += (ulg)outcnt;
+    output_ptr += (ulg)outcnt;
+    outcnt = 0;
+}
+
+static void flush_window_high(void)
+{
+    ulg c = crc;         /* temporary variable */
+    unsigned n;
+    uch *in,  ch;
+    in = window;
+    for (n = 0; n < outcnt; n++) {
+	ch = *output_data++ = *in++;
+	if ((ulg) output_data == LOW_BUFFER_END)
+		output_data = high_buffer_start;
+	c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+    }
+    crc = c;
+    bytes_out += (ulg)outcnt;
+    outcnt = 0;
+}
+
+static void flush_window(void)
+{
+	if (high_loaded)
+		flush_window_high();
+	else
+		flush_window_low();
+}
+
+static void error(const char *x)
+{
+	kputs("\n\n");
+	kputs(x);
+	kputs("\n\n -- System halted");
+
+	while (1)
+		/* Halt */;
+}
+
+#define STACK_SIZE (4096)
+
+long user_stack[STACK_SIZE];
+
+struct {
+	long *a;
+	short b;
+} stack_start = { &user_stack[STACK_SIZE], 0 };
+
+void setup_normal_output_buffer(void)
+{
+#ifdef STANDARD_MEMORY_BIOS_CALL
+	if (EXT_MEM_K < 1024)
+		error("Less than 2MB of memory.\n");
+#else
+	if ((ALT_MEM_K > EXT_MEM_K ? ALT_MEM_K : EXT_MEM_K) < 1024)
+		error("Less than 2MB of memory.\n");
+#endif
+	output_data = (char *) 0x100000; /* Points to 1M */
+}
+
+struct moveparams {
+	uch *low_buffer_start;
+	int lcount;
+	uch *high_buffer_start;
+	int hcount;
+};
+
+void setup_output_buffer_if_we_run_high(struct moveparams *mv)
+{
+	high_buffer_start = (uch *)(((ulg) &end) + HEAP_SIZE);
+#ifdef STANDARD_MEMORY_BIOS_CALL
+	if (EXT_MEM_K < (3 * 1024))
+		error("Less than 4MB of memory.\n");
+#else
+	if ((ALT_MEM_K > EXT_MEM_K ? ALT_MEM_K : EXT_MEM_K) < (3 * 1024))
+		error("Less than 4MB of memory.\n");
+#endif
+	mv->low_buffer_start = output_data = (char *) LOW_BUFFER_START;
+	high_loaded = 1;
+	free_mem_end_ptr = (long) high_buffer_start;
+	if (0x100000 + LOW_BUFFER_SIZE > (ulg) high_buffer_start) {
+		high_buffer_start = (uch *)(0x100000 + LOW_BUFFER_SIZE);
+		mv->hcount = 0; /* say: we need not to move high_buffer */
+	} else {
+		mv->hcount = -1;
+	}
+	mv->high_buffer_start = high_buffer_start;
+}
+
+void close_output_buffer_if_we_run_high(struct moveparams *mv)
+{
+	mv->lcount = bytes_out;
+	if (bytes_out > LOW_BUFFER_SIZE) {
+		mv->lcount = LOW_BUFFER_SIZE;
+		if (mv->hcount)
+			mv->hcount = bytes_out - LOW_BUFFER_SIZE;
+	} else {
+		mv->hcount = 0;
+	}
+}
+
+#undef DEBUGFLAG
+#ifdef DEBUGFLAG
+int debugflag;
+#endif
+
+int decompress_kernel(struct moveparams *mv)
+{
+#ifdef DEBUGFLAG
+	while (!debugflag)
+		barrier();
+#endif
+
+	output_data = (char *) CONFIG_KERNEL_TEXT_ADDRESS;
+
+	makecrc();
+	kputs("Uncompressing Linux... ");
+	gunzip();
+	kputs("Ok, booting the kernel.\n");
+	return 0;
+}
diff --git a/arch/mn10300/boot/compressed/misc.h b/arch/mn10300/boot/compressed/misc.h
new file mode 100644
index 00000000000..da921cd172f
--- /dev/null
+++ b/arch/mn10300/boot/compressed/misc.h
@@ -0,0 +1,18 @@
+/* Internal definitions for the MN10300 kernel decompressor
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+extern int end;
+
+/*
+ * vmlinux.lds
+ */
+extern char input_data[];
+extern int input_len;
diff --git a/arch/mn10300/boot/compressed/vmlinux.lds b/arch/mn10300/boot/compressed/vmlinux.lds
new file mode 100644
index 00000000000..a084903603f
--- /dev/null
+++ b/arch/mn10300/boot/compressed/vmlinux.lds
@@ -0,0 +1,9 @@
+SECTIONS
+{
+  .data : {
+	input_len = .;
+	LONG(input_data_end - input_data) input_data = .;
+	*(.data)
+	input_data_end = .;
+	}
+}