Merge ../linux-2.6/

5 files changed, 607 insertions, 0 deletions

diff --git a/arch/cris/arch-v32/boot/compressed/Makefile b/arch/cris/arch-v32/boot/compressed/Makefile
new file mode 100644
index 00000000000..9f77eda914b
--- /dev/null
+++ b/arch/cris/arch-v32/boot/compressed/Makefile
@@ -0,0 +1,41 @@
+#
+# lx25/arch/cris/arch-v32/boot/compressed/Makefile
+#
+# create a compressed vmlinux image from the original vmlinux files and romfs
+#
+
+target = $(target_compressed_dir)
+src    = $(src_compressed_dir)
+
+CC = gcc-cris -mlinux -march=v32 -I $(TOPDIR)/include
+CFLAGS = -O2
+LD = gcc-cris -mlinux -march=v32 -nostdlib
+OBJCOPY = objcopy-cris
+OBJCOPYFLAGS = -O binary --remove-section=.bss
+OBJECTS = $(target)/head.o $(target)/misc.o
+
+# files to compress
+SYSTEM = $(objtree)/vmlinux.bin
+
+all: vmlinuz
+
+$(target)/decompress.bin: $(OBJECTS)
+	$(LD) -T $(src)/decompress.ld -o $(target)/decompress.o $(OBJECTS)
+	$(OBJCOPY) $(OBJCOPYFLAGS) $(target)/decompress.o $(target)/decompress.bin
+
+$(objtree)/vmlinuz: $(target) piggy.img $(target)/decompress.bin
+	cat $(target)/decompress.bin piggy.img > $(objtree)/vmlinuz
+	rm -f piggy.img
+	cp $(objtree)/vmlinuz $(src)
+
+$(target)/head.o: $(src)/head.S
+	$(CC) -D__ASSEMBLY__ -c $< -o $@
+
+# gzip the kernel image
+
+piggy.img: $(SYSTEM)
+	cat $(SYSTEM) | gzip -f -9 > piggy.img
+
+clean:
+	rm -f piggy.img $(objtree)/vmlinuz vmlinuz.o decompress.o decompress.bin $(OBJECTS)
+
diff --git a/arch/cris/arch-v32/boot/compressed/README b/arch/cris/arch-v32/boot/compressed/README
new file mode 100644
index 00000000000..e33691d15c5
--- /dev/null
+++ b/arch/cris/arch-v32/boot/compressed/README
@@ -0,0 +1,25 @@
+Creation of the self-extracting compressed kernel image (vmlinuz)
+-----------------------------------------------------------------
+$Id: README,v 1.1 2003/08/21 09:37:03 johana Exp $
+
+This can be slightly confusing because it's a process with many steps.
+
+The kernel object built by the arch/etrax100/Makefile, vmlinux, is split
+by that makefile into text and data binary files, vmlinux.text and
+vmlinux.data.
+
+Those files together with a ROM filesystem can be catted together and
+burned into a flash or executed directly at the DRAM origin.
+
+They can also be catted together and compressed with gzip, which is what
+happens in this makefile. Together they make up piggy.img.
+
+The decompressor is built into the file decompress.o. It is turned into
+the binary file decompress.bin, which is catted together with piggy.img
+into the file vmlinuz. It can be executed in an arbitrary place in flash.
+
+Be careful - it assumes some things about free locations in DRAM. It
+assumes the DRAM starts at 0x40000000 and that it is at least 8 MB,
+so it puts its code at 0x40700000, and initial stack at 0x40800000.
+
+-Bjorn
diff --git a/arch/cris/arch-v32/boot/compressed/decompress.ld b/arch/cris/arch-v32/boot/compressed/decompress.ld
new file mode 100644
index 00000000000..3c837feca3a
--- /dev/null
+++ b/arch/cris/arch-v32/boot/compressed/decompress.ld
@@ -0,0 +1,30 @@
+/*#OUTPUT_FORMAT(elf32-us-cris) */
+OUTPUT_ARCH (crisv32)
+
+MEMORY
+	{
+	dram : ORIGIN = 0x40700000,
+	       LENGTH = 0x00100000
+	}
+
+SECTIONS
+{
+	.text :
+	{
+		_stext = . ;
+		*(.text)
+		*(.rodata)
+		*(.rodata.*)
+		_etext = . ;
+	} > dram
+	.data :
+	{
+		*(.data)
+		_edata = . ;
+	} > dram
+	.bss :
+	{
+		*(.bss)
+		_end = ALIGN( 0x10 ) ;
+	} > dram
+}
diff --git a/arch/cris/arch-v32/boot/compressed/head.S b/arch/cris/arch-v32/boot/compressed/head.S
new file mode 100644
index 00000000000..0c55b83b828
--- /dev/null
+++ b/arch/cris/arch-v32/boot/compressed/head.S
@@ -0,0 +1,193 @@
+/*
+ *  Code that sets up the DRAM registers, calls the
+ *  decompressor to unpack the piggybacked kernel, and jumps.
+ *
+ *  Copyright (C) 1999 - 2003, Axis Communications AB
+ */
+
+#include <linux/config.h>
+#define ASSEMBLER_MACROS_ONLY
+#include <asm/arch/hwregs/asm/reg_map_asm.h>
+#include <asm/arch/hwregs/asm/gio_defs_asm.h>
+#include <asm/arch/hwregs/asm/config_defs_asm.h>
+
+#define RAM_INIT_MAGIC 0x56902387
+#define COMMAND_LINE_MAGIC 0x87109563
+
+	;; Exported symbols
+
+	.globl	input_data
+
+	.text
+start:
+	di
+
+	;; Start clocks for used blocks.
+	move.d REG_ADDR(config, regi_config, rw_clk_ctrl), $r1
+	move.d [$r1], $r0
+	or.d   REG_STATE(config, rw_clk_ctrl, cpu, yes) | \
+	       REG_STATE(config, rw_clk_ctrl, bif, yes) | \
+	       REG_STATE(config, rw_clk_ctrl, fix_io, yes), $r0
+	move.d $r0, [$r1]
+
+	;; If booting from NAND flash we first have to copy some
+	;; data from NAND flash to internal RAM to get the code
+	;; that initializes the SDRAM. Lets copy 20 KB. This
+	;; code executes at 0x38010000 if booting from NAND and
+	;; we are guaranted that at least 0x200 bytes are good so
+	;; lets start from there. The first 8192 bytes in the nand
+	;; flash is spliced with zeroes and is thus 16384 bytes.
+	move.d 0x38010200, $r10
+	move.d 0x14200, $r11	; Start offset in NAND flash 0x10200 + 16384
+	move.d 0x5000, $r12	; Length of copy
+
+	;; Before this code the tools add a partitiontable so the PC
+	;; has an offset from the linked address.
+offset1:
+	lapcq  ., $r13		; get PC
+	add.d	first_copy_complete-offset1, $r13
+
+#include "../../lib/nand_init.S"
+
+first_copy_complete:
+	;; Initialze the DRAM registers.
+	cmp.d	RAM_INIT_MAGIC, $r8	; Already initialized?
+	beq	dram_init_finished
+	nop
+
+#include "../../lib/dram_init.S"
+
+dram_init_finished:
+	lapcq  ., $r13		; get PC
+	add.d	second_copy_complete-dram_init_finished, $r13
+
+	move.d REG_ADDR(config, regi_config, r_bootsel), $r0
+	move.d [$r0], $r0
+	and.d  REG_MASK(config, r_bootsel, boot_mode), $r0
+	cmp.d  REG_STATE(config, r_bootsel, boot_mode, nand), $r0
+	bne second_copy_complete ; No NAND boot
+	nop
+
+	;; Copy 2MB from NAND flash to SDRAM (at 2-4MB into the SDRAM)
+	move.d 0x40204000, $r10
+	move.d 0x8000, $r11
+	move.d 0x200000, $r12
+	ba copy_nand_to_ram
+	nop
+second_copy_complete:
+
+	;; Initiate the PA port.
+	move.d	CONFIG_ETRAX_DEF_GIO_PA_OUT, $r0
+	move.d	REG_ADDR(gio, regi_gio, rw_pa_dout), $r1
+	move.d	$r0, [$r1]
+
+	move.d	CONFIG_ETRAX_DEF_GIO_PA_OE, $r0
+	move.d	REG_ADDR(gio, regi_gio, rw_pa_oe), $r1
+	move.d	$r0, [$r1]
+
+	;; Setup the stack to a suitably high address.
+	;; We assume 8 MB is the minimum DRAM and put
+	;; the SP at the top for now.
+
+	move.d	0x40800000, $sp
+
+	;; Figure out where the compressed piggyback image is
+	;; in the flash (since we wont try to copy it to DRAM
+	;; before unpacking). It is at _edata, but in flash.
+	;; Use (_edata - herami) as offset to the current PC.
+
+	move.d REG_ADDR(config, regi_config, r_bootsel), $r0
+	move.d [$r0], $r0
+	and.d  REG_MASK(config, r_bootsel, boot_mode), $r0
+	cmp.d  REG_STATE(config, r_bootsel, boot_mode, nand), $r0
+	beq hereami2
+	nop
+hereami:
+	lapcq	., $r5		; get PC
+	and.d	0x7fffffff, $r5	; strip any non-cache bit
+	move.d	$r5, $r0	; save for later - flash address of 'herami'
+	add.d	_edata, $r5
+	sub.d	hereami, $r5	; r5 = flash address of '_edata'
+	move.d	hereami, $r1	; destination
+	ba 2f
+	nop
+hereami2:
+	lapcq	., $r5		; get PC
+	and.d	0x00ffffff, $r5	; strip any non-cache bit
+	move.d  $r5, $r6
+	or.d    0x40200000, $r6
+	move.d	$r6, $r0	; save for later - flash address of 'herami'
+	add.d	_edata, $r5
+	sub.d	hereami2, $r5	; r5 = flash address of '_edata'
+	add.d   0x40200000, $r5
+	move.d	hereami2, $r1	; destination
+2:
+	;; Copy text+data to DRAM
+
+	move.d	_edata, $r2	; end destination
+1:	move.w	[$r0+], $r3
+	move.w	$r3, [$r1+]
+	cmp.d	$r2, $r1
+	bcs	1b
+	nop
+
+	move.d	input_data, $r0 ; for the decompressor
+	move.d	$r5, [$r0]	; for the decompressor
+
+	;; Clear the decompressors BSS (between _edata and _end)
+
+	moveq	0, $r0
+	move.d	_edata, $r1
+	move.d	_end, $r2
+1:	move.w	$r0, [$r1+]
+	cmp.d	$r2, $r1
+	bcs	1b
+	nop
+
+	;;  Save command line magic and address.
+	move.d	_cmd_line_magic, $r12
+	move.d  $r10, [$r12]
+	move.d	_cmd_line_addr, $r12
+	move.d  $r11, [$r12]
+
+	;; Do the decompression and save compressed size in _inptr
+
+	jsr	decompress_kernel
+	nop
+
+	;; Restore command line magic and address.
+	move.d  _cmd_line_magic, $r10
+	move.d  [$r10], $r10
+	move.d  _cmd_line_addr, $r11
+	move.d  [$r11], $r11
+
+	;; Put start address of root partition in r9 so the kernel can use it
+	;; when mounting from flash
+	move.d  input_data, $r0
+	move.d	[$r0], $r9		; flash address of compressed kernel
+	move.d  inptr, $r0
+	add.d	[$r0], $r9		; size of compressed kernel
+	cmp.d   0x40200000, $r9
+	blo	enter_kernel
+	nop
+	sub.d   0x40200000, $r9
+	add.d   0x4000, $r9
+
+enter_kernel:
+	;; Enter the decompressed kernel
+	move.d	RAM_INIT_MAGIC, $r8	; Tell kernel that DRAM is initialized
+	jump	0x40004000	; kernel is linked to this address
+	nop
+
+	.data
+
+input_data:
+	.dword	0		; used by the decompressor
+_cmd_line_magic:
+	.dword 0
+_cmd_line_addr:
+	.dword 0
+is_nand_boot:
+	.dword  0
+
+#include "../../lib/hw_settings.S"
diff --git a/arch/cris/arch-v32/boot/compressed/misc.c b/arch/cris/arch-v32/boot/compressed/misc.c
new file mode 100644
index 00000000000..54644238ed5
--- /dev/null
+++ b/arch/cris/arch-v32/boot/compressed/misc.c
@@ -0,0 +1,318 @@
+/*
+ * misc.c
+ *
+ * $Id: misc.c,v 1.8 2005/04/24 18:34:29 starvik Exp $
+ *
+ * This is a collection of several routines from gzip-1.0.3
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ * puts by Nick Holloway 1993, better puts by Martin Mares 1995
+ * adoptation for Linux/CRIS Axis Communications AB, 1999
+ *
+ */
+
+/* where the piggybacked kernel image expects itself to live.
+ * it is the same address we use when we network load an uncompressed
+ * image into DRAM, and it is the address the kernel is linked to live
+ * at by vmlinux.lds.S
+ */
+
+#define KERNEL_LOAD_ADR 0x40004000
+
+#include <linux/config.h>
+
+#include <linux/types.h>
+#include <asm/arch/hwregs/reg_rdwr.h>
+#include <asm/arch/hwregs/reg_map.h>
+#include <asm/arch/hwregs/ser_defs.h>
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args)  args
+#define STATIC static
+
+void* memset(void* s, int c, size_t n);
+void* memcpy(void* __dest, __const void* __src,
+	     size_t __n);
+
+#define memzero(s, n)     memset ((s), 0, (n))
+
+
+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 */
+
+unsigned inptr = 0;	/* index of next byte to be processed in inbuf
+			 * After decompression it will contain the
+			 * compressed size, and head.S will read it.
+			 */
+
+static unsigned outcnt = 0;  /* 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 */
+
+#define get_byte() inbuf[inptr++]
+
+/* 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(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+
+extern char *input_data;  /* lives in head.S */
+
+static long bytes_out = 0;
+static uch *output_data;
+static unsigned long output_ptr = 0;
+
+static void *malloc(int size);
+static void free(void *where);
+static void error(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+
+static void puts(const char *);
+
+/* the "heap" is put directly after the BSS ends, at end */
+
+extern int _end;
+static long free_mem_ptr = (long)&_end;
+
+#include "../../../../../lib/inflate.c"
+
+static void *malloc(int size)
+{
+	void *p;
+
+	if (size <0) error("Malloc error");
+
+	free_mem_ptr = (free_mem_ptr + 3) & ~3;	/* Align */
+
+	p = (void *)free_mem_ptr;
+	free_mem_ptr += size;
+
+	return p;
+}
+
+static void free(void *where)
+{	/* Don't care */
+}
+
+static void gzip_mark(void **ptr)
+{
+	*ptr = (void *) free_mem_ptr;
+}
+
+static void gzip_release(void **ptr)
+{
+	free_mem_ptr = (long) *ptr;
+}
+
+/* decompressor info and error messages to serial console */
+
+static inline void
+serout(const char *s, reg_scope_instances regi_ser)
+{
+	reg_ser_rs_stat_din rs;
+	reg_ser_rw_dout dout = {.data = *s};
+
+	do {
+		rs = REG_RD(ser, regi_ser, rs_stat_din);
+	}
+	while (!rs.tr_rdy);/* Wait for tranceiver. */
+
+	REG_WR(ser, regi_ser, rw_dout, dout);
+}
+
+static void
+puts(const char *s)
+{
+#ifndef CONFIG_ETRAX_DEBUG_PORT_NULL
+	while (*s) {
+#ifdef CONFIG_ETRAX_DEBUG_PORT0
+		serout(s, regi_ser0);
+#endif
+#ifdef CONFIG_ETRAX_DEBUG_PORT1
+		serout(s, regi_ser1);
+#endif
+#ifdef CONFIG_ETRAX_DEBUG_PORT2
+		serout(s, regi_ser2);
+#endif
+#ifdef CONFIG_ETRAX_DEBUG_PORT3
+		serout(s, regi_ser3);
+#endif
+		*s++;
+	}
+/* CONFIG_ETRAX_DEBUG_PORT_NULL */
+#endif
+}
+
+void*
+memset(void* s, int c, size_t n)
+{
+	int i;
+	char *ss = (char*)s;
+
+	for (i=0;i<n;i++) ss[i] = c;
+}
+
+void*
+memcpy(void* __dest, __const void* __src,
+			    size_t __n)
+{
+	int i;
+	char *d = (char *)__dest, *s = (char *)__src;
+
+	for (i=0;i<__n;i++) d[i] = s[i];
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+
+static void
+flush_window()
+{
+    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
+error(char *x)
+{
+	puts("\n\n");
+	puts(x);
+	puts("\n\n -- System halted\n");
+
+	while(1);	/* Halt */
+}
+
+void
+setup_normal_output_buffer()
+{
+	output_data = (char *)KERNEL_LOAD_ADR;
+}
+
+static inline void
+serial_setup(reg_scope_instances regi_ser)
+{
+	reg_ser_rw_xoff xoff;
+	reg_ser_rw_tr_ctrl tr_ctrl;
+	reg_ser_rw_rec_ctrl rec_ctrl;
+	reg_ser_rw_tr_baud_div tr_baud;
+	reg_ser_rw_rec_baud_div rec_baud;
+
+	/* Turn off XOFF. */
+	xoff = REG_RD(ser, regi_ser, rw_xoff);
+
+	xoff.chr = 0;
+	xoff.automatic = regk_ser_no;
+
+	REG_WR(ser, regi_ser, rw_xoff, xoff);
+
+	/* Set baudrate and stopbits. */
+	tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
+	rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
+	tr_baud = REG_RD(ser, regi_ser, rw_tr_baud_div);
+	rec_baud = REG_RD(ser, regi_ser, rw_rec_baud_div);
+
+	tr_ctrl.stop_bits = 1;	/* 2 stop bits. */
+
+	/*
+	 * The baudrate setup is a bit fishy, but in the end the tranceiver is
+	 * set to 4800 and the receiver to 115200. The magic value is
+	 * 29.493 MHz.
+	 */
+	tr_ctrl.base_freq = regk_ser_f29_493;
+	rec_ctrl.base_freq = regk_ser_f29_493;
+	tr_baud.div = (29493000 / 8) / 4800;
+	rec_baud.div = (29493000 / 8) / 115200;
+
+	REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
+	REG_WR(ser, regi_ser, rw_tr_baud_div, tr_baud);
+	REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
+	REG_WR(ser, regi_ser, rw_rec_baud_div, rec_baud);
+}
+
+void
+decompress_kernel()
+{
+	char revision;
+
+	/* input_data is set in head.S */
+	inbuf = input_data;
+
+#ifdef CONFIG_ETRAX_DEBUG_PORT0
+	serial_setup(regi_ser0);
+#endif
+#ifdef CONFIG_ETRAX_DEBUG_PORT1
+	serial_setup(regi_ser1);
+#endif
+#ifdef CONFIG_ETRAX_DEBUG_PORT2
+	serial_setup(regi_ser2);
+#endif
+#ifdef CONFIG_ETRAX_DEBUG_PORT3
+	serial_setup(regi_ser3);
+#endif
+
+	setup_normal_output_buffer();
+
+	makecrc();
+
+	__asm__ volatile ("move $vr,%0" : "=rm" (revision));
+	if (revision < 32)
+	{
+		puts("You need an ETRAX FS to run Linux 2.6/crisv32.\n");
+		while(1);
+	}
+
+	puts("Uncompressing Linux...\n");
+	gunzip();
+	puts("Done. Now booting the kernel.\n");
+}