bc22c17e12
Impact: Replaces inflate.c with a wrapper around zlib_inflate; new library code This is the first part of the bzip2/lzma patch The bzip patch is based on an idea by Christian Ludwig, includes support for compressing the kernel with bzip2 or lzma rather than gzip. Both compressors give smaller sizes than gzip. Lzma's decompresses faster than bzip2. It also supports ramdisks and initramfs' compressed using these two compressors. The functionality has been successfully used for a couple of years by the udpcast project This version applies to "tip" kernel 2.6.28 This part contains: - changed inflate.c to accomodate rest of patch - implementation of bzip2 compression (not used at this stage yet) - implementation of lzma compression (not used at this stage yet) - Makefile routines to support bzip2 and lzma kernel compression Signed-off-by: Alain Knaff <alain@knaff.lu> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
/*
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* linux/compr_mm.h
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*
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* Memory management for pre-boot and ramdisk uncompressors
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*
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* Authors: Alain Knaff <alain@knaff.lu>
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*
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*/
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#ifndef DECOMPR_MM_H
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#define DECOMPR_MM_H
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#ifdef STATIC
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/* Code active when included from pre-boot environment: */
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/* A trivial malloc implementation, adapted from
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* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
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*/
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static unsigned long malloc_ptr;
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static int malloc_count;
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static void *malloc(int size)
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{
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void *p;
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if (size < 0)
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error("Malloc error");
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if (!malloc_ptr)
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malloc_ptr = free_mem_ptr;
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malloc_ptr = (malloc_ptr + 3) & ~3; /* Align */
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p = (void *)malloc_ptr;
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malloc_ptr += size;
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if (free_mem_end_ptr && malloc_ptr >= free_mem_end_ptr)
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error("Out of memory");
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malloc_count++;
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return p;
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}
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static void free(void *where)
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{
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malloc_count--;
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if (!malloc_count)
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malloc_ptr = free_mem_ptr;
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}
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#define large_malloc(a) malloc(a)
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#define large_free(a) free(a)
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#define set_error_fn(x)
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#define INIT
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#else /* STATIC */
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/* Code active when compiled standalone for use when loading ramdisk: */
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/string.h>
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#include <linux/vmalloc.h>
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/* Use defines rather than static inline in order to avoid spurious
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* warnings when not needed (indeed large_malloc / large_free are not
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* needed by inflate */
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#define malloc(a) kmalloc(a, GFP_KERNEL)
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#define free(a) kfree(a)
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#define large_malloc(a) vmalloc(a)
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#define large_free(a) vfree(a)
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static void(*error)(char *m);
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#define set_error_fn(x) error = x;
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#define INIT __init
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#define STATIC
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#include <linux/init.h>
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#endif /* STATIC */
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#endif /* DECOMPR_MM_H */
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