138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
/*
|
|
* Copyright 2015 Google Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL 2.0+ BSD-3-Clause
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <compiler.h>
|
|
#include <misc.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
static u16 LZ4_readLE16(const void *src)
|
|
{
|
|
return get_unaligned_le16(src);
|
|
}
|
|
static void LZ4_copy4(void *dst, const void *src)
|
|
{
|
|
put_unaligned(get_unaligned((const u32 *)src), (u32 *)dst);
|
|
}
|
|
static void LZ4_copy8(void *dst, const void *src)
|
|
{
|
|
put_unaligned(get_unaligned((const u64 *)src), (u64 *)dst);
|
|
}
|
|
|
|
typedef uint8_t BYTE;
|
|
typedef uint16_t U16;
|
|
typedef uint32_t U32;
|
|
typedef int32_t S32;
|
|
typedef uint64_t U64;
|
|
|
|
#define FORCE_INLINE static inline __attribute__((always_inline))
|
|
|
|
/* Unaltered (except removing unrelated code) from github.com/Cyan4973/lz4. */
|
|
#include "lz4.c" /* #include for inlining, do not link! */
|
|
|
|
bool lz4_is_valid_header(const unsigned char *h)
|
|
{
|
|
const struct lz4_frame_header *hdr = (const struct lz4_frame_header *)h;
|
|
/* We assume there's always only a single, standard frame. */
|
|
if (le32_to_cpu(hdr->magic) != LZ4F_MAGIC || hdr->version != 1)
|
|
return false; /* unknown format */
|
|
if (hdr->reserved0 || hdr->reserved1 || hdr->reserved2)
|
|
return false; /* reserved must be zero */
|
|
if (!hdr->independent_blocks)
|
|
return false; /* we can't support this yet */
|
|
|
|
return true;
|
|
}
|
|
|
|
int ulz4fn(const void *src, size_t srcn, void *dst, size_t *dstn)
|
|
{
|
|
const void *end = dst + *dstn;
|
|
const void *in = src;
|
|
void *out = dst;
|
|
int has_block_checksum;
|
|
int ret;
|
|
*dstn = 0;
|
|
|
|
#if defined(CONFIG_MISC_DECOMPRESS) && !defined(CONFIG_SPL_BUILD)
|
|
u64 len;
|
|
|
|
ret = misc_decompress_process((ulong)dst, (ulong)src, (ulong)srcn,
|
|
DECOM_LZ4, false, &len, 0);
|
|
if (!ret) {
|
|
*dstn = len;
|
|
return 0;
|
|
}
|
|
|
|
printf("hw ulz4fn failed(%d), fallback to soft ulz4fn\n", ret);
|
|
#endif
|
|
{ /* With in-place decompression the header may become invalid later. */
|
|
const struct lz4_frame_header *h = in;
|
|
|
|
if (srcn < sizeof(*h) + sizeof(u64) + sizeof(u8))
|
|
return -EINVAL; /* input overrun */
|
|
|
|
/* We assume there's always only a single, standard frame. */
|
|
if (le32_to_cpu(h->magic) != LZ4F_MAGIC || h->version != 1)
|
|
return -EPROTONOSUPPORT; /* unknown format */
|
|
if (h->reserved0 || h->reserved1 || h->reserved2)
|
|
return -EINVAL; /* reserved must be zero */
|
|
if (!h->independent_blocks)
|
|
return -EPROTONOSUPPORT; /* we can't support this yet */
|
|
has_block_checksum = h->has_block_checksum;
|
|
|
|
in += sizeof(*h);
|
|
if (h->has_content_size)
|
|
in += sizeof(u64);
|
|
in += sizeof(u8);
|
|
}
|
|
|
|
while (1) {
|
|
struct lz4_block_header b;
|
|
|
|
b.raw = le32_to_cpu(*(u32 *)in);
|
|
in += sizeof(struct lz4_block_header);
|
|
|
|
if (in - src + b.size > srcn) {
|
|
ret = -EINVAL; /* input overrun */
|
|
break;
|
|
}
|
|
|
|
if (!b.size) {
|
|
ret = 0; /* decompression successful */
|
|
break;
|
|
}
|
|
|
|
if (b.not_compressed) {
|
|
size_t size = min((ptrdiff_t)b.size, end - out);
|
|
memcpy(out, in, size);
|
|
out += size;
|
|
if (size < b.size) {
|
|
ret = -ENOBUFS; /* output overrun */
|
|
break;
|
|
}
|
|
} else {
|
|
/* constant folding essential, do not touch params! */
|
|
ret = LZ4_decompress_generic(in, out, b.size,
|
|
end - out, endOnInputSize,
|
|
full, 0, noDict, out, NULL, 0);
|
|
if (ret < 0) {
|
|
ret = -EPROTO; /* decompression error */
|
|
break;
|
|
}
|
|
out += ret;
|
|
}
|
|
|
|
in += b.size;
|
|
if (has_block_checksum)
|
|
in += sizeof(u32);
|
|
}
|
|
|
|
*dstn = out - dst;
|
|
return ret;
|
|
}
|