aboutsummaryrefslogtreecommitdiff
path: root/arch/mn10300/boot/compressed
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2008-02-08 04:19:31 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:30 -0800
commitb920de1b77b72ca9432ac3f97edb26541e65e5dd (patch)
tree40fa9be1470e929c47927dea7eddf184c0204229 /arch/mn10300/boot/compressed
parentef3d534754f31fed9c3b976fee1ece1b3bc38282 (diff)
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>
Diffstat (limited to 'arch/mn10300/boot/compressed')
-rw-r--r--arch/mn10300/boot/compressed/Makefile22
-rw-r--r--arch/mn10300/boot/compressed/head.S86
-rw-r--r--arch/mn10300/boot/compressed/misc.c429
-rw-r--r--arch/mn10300/boot/compressed/misc.h18
-rw-r--r--arch/mn10300/boot/compressed/vmlinux.lds9
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 = .;
+ }
+}