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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/cris/arch-v10/boot/compressed/misc.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/cris/arch-v10/boot/compressed/misc.c')
-rw-r--r--arch/cris/arch-v10/boot/compressed/misc.c273
1 files changed, 273 insertions, 0 deletions
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 000000000000..1b5e83f1f846
--- /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");
+}