diff options
Diffstat (limited to 'arch/cris/arch-v10/boot/compressed')
| -rw-r--r-- | arch/cris/arch-v10/boot/compressed/Makefile | 40 | ||||
| -rw-r--r-- | arch/cris/arch-v10/boot/compressed/README | 25 | ||||
| -rw-r--r-- | arch/cris/arch-v10/boot/compressed/decompress.ld | 29 | ||||
| -rw-r--r-- | arch/cris/arch-v10/boot/compressed/head.S | 111 | ||||
| -rw-r--r-- | arch/cris/arch-v10/boot/compressed/misc.c | 273 |
5 files changed, 478 insertions, 0 deletions
diff --git a/arch/cris/arch-v10/boot/compressed/Makefile b/arch/cris/arch-v10/boot/compressed/Makefile new file mode 100644 index 00000000000..5f71c2c819e --- /dev/null +++ b/arch/cris/arch-v10/boot/compressed/Makefile @@ -0,0 +1,40 @@ +# +# linux/arch/etrax100/boot/compressed/Makefile +# +# create a compressed vmlinux image from the original vmlinux files and romfs +# + +CC = gcc-cris -melf -I $(TOPDIR)/include +CFLAGS = -O2 +LD = ld-cris +OBJCOPY = objcopy-cris +OBJCOPYFLAGS = -O binary --remove-section=.bss +OBJECTS = head.o misc.o + +# files to compress +SYSTEM = $(TOPDIR)/vmlinux.bin + +all: vmlinuz + +decompress.bin: $(OBJECTS) + $(LD) -T decompress.ld -o decompress.o $(OBJECTS) + $(OBJCOPY) $(OBJCOPYFLAGS) decompress.o decompress.bin +# save it for mkprod in the topdir. + cp decompress.bin $(TOPDIR) + + +vmlinuz: piggy.img decompress.bin + cat decompress.bin piggy.img > vmlinuz + rm -f piggy.img + +head.o: head.S + $(CC) -D__ASSEMBLY__ -traditional -c head.S -o head.o + +# gzip the kernel image + +piggy.img: $(SYSTEM) + cat $(SYSTEM) | gzip -f -9 > piggy.img + +clean: + rm -f piggy.img vmlinuz vmlinuz.o + diff --git a/arch/cris/arch-v10/boot/compressed/README b/arch/cris/arch-v10/boot/compressed/README new file mode 100644 index 00000000000..48b3db9924b --- /dev/null +++ b/arch/cris/arch-v10/boot/compressed/README @@ -0,0 +1,25 @@ +Creation of the self-extracting compressed kernel image (vmlinuz) +----------------------------------------------------------------- +$Id: README,v 1.1 2001/12/17 13:59:27 bjornw 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-v10/boot/compressed/decompress.ld b/arch/cris/arch-v10/boot/compressed/decompress.ld new file mode 100644 index 00000000000..0b0a14fe617 --- /dev/null +++ b/arch/cris/arch-v10/boot/compressed/decompress.ld @@ -0,0 +1,29 @@ +OUTPUT_FORMAT(elf32-us-cris) + +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-v10/boot/compressed/head.S b/arch/cris/arch-v10/boot/compressed/head.S new file mode 100644 index 00000000000..4cbdd4b1d9d --- /dev/null +++ b/arch/cris/arch-v10/boot/compressed/head.S @@ -0,0 +1,111 @@ +/* + * arch/cris/boot/compressed/head.S + * + * Copyright (C) 1999, 2001 Axis Communications AB + * + * Code that sets up the DRAM registers, calls the + * decompressor to unpack the piggybacked kernel, and jumps. + * + */ + +#include <linux/config.h> +#define ASSEMBLER_MACROS_ONLY +#include <asm/arch/sv_addr_ag.h> + +#define RAM_INIT_MAGIC 0x56902387 + + ;; Exported symbols + + .globl _input_data + + + .text + + nop + di + +;; We need to initialze DRAM registers before we start using the DRAM + + cmp.d RAM_INIT_MAGIC, r8 ; Already initialized? + beq dram_init_finished + nop + +#include "../../lib/dram_init.S" + +dram_init_finished: + + ;; Initiate the PA and PB ports + + move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, r0 + move.b r0, [R_PORT_PA_DATA] + + move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR, r0 + move.b r0, [R_PORT_PA_DIR] + + move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, r0 + move.b r0, [R_PORT_PB_DATA] + + move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR, r0 + move.b r0, [R_PORT_PB_DIR] + + ;; Setup the stack to a suitably high address. + ;; We assume 8 MB is the minimum DRAM in an eLinux + ;; product 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 - basse) as offset to the current PC. + +basse: move.d pc, r5 + and.d 0x7fffffff, r5 ; strip any non-cache bit + subq 2, r5 ; compensate for the move.d pc instr + move.d r5, r0 ; save for later - flash address of 'basse' + add.d _edata, r5 + sub.d basse, r5 ; r5 = flash address of '_edata' + + ;; Copy text+data to DRAM + + move.d basse, r1 ; destination + move.d _edata, r2 ; end destination +1: move.w [r0+], r3 + move.w r3, [r1+] + cmp.d r2, r1 + bcs 1b + nop + + move.d r5, [_input_data] ; 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 + + ;; Do the decompression and save compressed size in _inptr + + jsr _decompress_kernel + + ;; Put start address of root partition in r9 so the kernel can use it + ;; when mounting from flash + + move.d [_input_data], r9 ; flash address of compressed kernel + add.d [_inptr], r9 ; size of compressed 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 + + .data + +_input_data: + .dword 0 ; used by the decompressor + +#include "../../lib/hw_settings.S" diff --git a/arch/cris/arch-v10/boot/compressed/misc.c b/arch/cris/arch-v10/boot/compressed/misc.c new file mode 100644 index 00000000000..1b5e83f1f84 --- /dev/null +++ b/arch/cris/arch-v10/boot/compressed/misc.c @@ -0,0 +1,273 @@ +/* + * misc.c + * + * $Id: misc.c,v 1.6 2003/10/27 08:04:31 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/svinto.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 void +puts(const char *s) +{ +#ifndef CONFIG_ETRAX_DEBUG_PORT_NULL + while(*s) { +#ifdef CONFIG_ETRAX_DEBUG_PORT0 + while(!(*R_SERIAL0_STATUS & (1 << 5))) ; + *R_SERIAL0_TR_DATA = *s++; +#endif +#ifdef CONFIG_ETRAX_DEBUG_PORT1 + while(!(*R_SERIAL1_STATUS & (1 << 5))) ; + *R_SERIAL1_TR_DATA = *s++; +#endif +#ifdef CONFIG_ETRAX_DEBUG_PORT2 + while(!(*R_SERIAL2_STATUS & (1 << 5))) ; + *R_SERIAL2_TR_DATA = *s++; +#endif +#ifdef CONFIG_ETRAX_DEBUG_PORT3 + while(!(*R_SERIAL3_STATUS & (1 << 5))) ; + *R_SERIAL3_TR_DATA = *s++; +#endif + } +#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; +} + +void +decompress_kernel() +{ + char revision; + + /* input_data is set in head.S */ + inbuf = input_data; + +#ifdef CONFIG_ETRAX_DEBUG_PORT0 + *R_SERIAL0_XOFF = 0; + *R_SERIAL0_BAUD = 0x99; + *R_SERIAL0_TR_CTRL = 0x40; +#endif +#ifdef CONFIG_ETRAX_DEBUG_PORT1 + *R_SERIAL1_XOFF = 0; + *R_SERIAL1_BAUD = 0x99; + *R_SERIAL1_TR_CTRL = 0x40; +#endif +#ifdef CONFIG_ETRAX_DEBUG_PORT2 + *R_GEN_CONFIG = 0x08; + *R_SERIAL2_XOFF = 0; + *R_SERIAL2_BAUD = 0x99; + *R_SERIAL2_TR_CTRL = 0x40; +#endif +#ifdef CONFIG_ETRAX_DEBUG_PORT3 + *R_GEN_CONFIG = 0x100; + *R_SERIAL3_XOFF = 0; + *R_SERIAL3_BAUD = 0x99; + *R_SERIAL3_TR_CTRL = 0x40; +#endif + + setup_normal_output_buffer(); + + makecrc(); + + __asm__ volatile ("move vr,%0" : "=rm" (revision)); + if (revision < 10) + { + puts("You need an ETRAX 100LX to run linux 2.6\n"); + while(1); + } + + puts("Uncompressing Linux...\n"); + gunzip(); + puts("Done. Now booting the kernel.\n"); +} |