diff options
author | Chris Zankel <czankel@tensilica.com> | 2005-06-23 22:01:12 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-24 00:05:21 -0700 |
commit | 4bedea94545165364618d403d03b61d797acba0b (patch) | |
tree | 04626bb71e0fb5ea5c5d5aa4fedc813301bea6a6 /arch/xtensa/boot/lib/zmem.c | |
parent | 8e1a6dd2fddcc73c9e933758361e3d9c076c688a (diff) |
[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 2
The attached patches provides part 2 of an architecture implementation for the
Tensilica Xtensa CPU series.
Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/xtensa/boot/lib/zmem.c')
-rw-r--r-- | arch/xtensa/boot/lib/zmem.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/xtensa/boot/lib/zmem.c b/arch/xtensa/boot/lib/zmem.c new file mode 100644 index 00000000000..7848f126d67 --- /dev/null +++ b/arch/xtensa/boot/lib/zmem.c @@ -0,0 +1,87 @@ +#include "zlib.h" + +/* bits taken from ppc */ + +extern void *avail_ram, *end_avail; + +void exit (void) +{ + for (;;); +} + +void *zalloc(void *x, unsigned items, unsigned size) +{ + void *p = avail_ram; + + size *= items; + size = (size + 7) & -8; + avail_ram += size; + if (avail_ram > end_avail) { + //puts("oops... out of memory\n"); + //pause(); + exit (); + } + return p; +} + +void zfree(void *x, void *addr, unsigned nb) +{ +} + + +#define HEAD_CRC 2 +#define EXTRA_FIELD 4 +#define ORIG_NAME 8 +#define COMMENT 0x10 +#define RESERVED 0xe0 + +#define DEFLATED 8 + +void gunzip (void *dst, int dstlen, unsigned char *src, int *lenp) +{ + z_stream s; + int r, i, flags; + + /* skip header */ + + i = 10; + flags = src[3]; + if (src[2] != DEFLATED || (flags & RESERVED) != 0) { + //puts("bad gzipped data\n"); + exit(); + } + if ((flags & EXTRA_FIELD) != 0) + i = 12 + src[10] + (src[11] << 8); + if ((flags & ORIG_NAME) != 0) + while (src[i++] != 0) + ; + if ((flags & COMMENT) != 0) + while (src[i++] != 0) + ; + if ((flags & HEAD_CRC) != 0) + i += 2; + if (i >= *lenp) { + //puts("gunzip: ran out of data in header\n"); + exit(); + } + + s.zalloc = zalloc; + s.zfree = zfree; + r = inflateInit2(&s, -MAX_WBITS); + if (r != Z_OK) { + //puts("inflateInit2 returned "); puthex(r); puts("\n"); + exit(); + } + s.next_in = src + i; + s.avail_in = *lenp - i; + s.next_out = dst; + s.avail_out = dstlen; + r = inflate(&s, Z_FINISH); + if (r != Z_OK && r != Z_STREAM_END) { + //puts("inflate returned "); puthex(r); puts("\n"); + exit(); + } + *lenp = s.next_out - (unsigned char *) dst; + inflateEnd(&s); +} + |