symbian-qemu-0.9.1-12/qemu-symbian-svp/block-cloop.c
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * QEMU Block driver for CLOOP images
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 *
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 * Copyright (c) 2004 Johannes E. Schindelin
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#include "qemu-common.h"
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#include "block_int.h"
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#include <zlib.h>
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typedef struct BDRVCloopState {
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    int fd;
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    uint32_t block_size;
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    uint32_t n_blocks;
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    uint64_t* offsets;
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    uint32_t sectors_per_block;
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    uint32_t current_block;
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    uint8_t *compressed_block;
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    uint8_t *uncompressed_block;
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    z_stream zstream;
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} BDRVCloopState;
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static int cloop_probe(const uint8_t *buf, int buf_size, const char *filename)
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{
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    const char* magic_version_2_0="#!/bin/sh\n"
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	"#V2.0 Format\n"
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	"modprobe cloop file=$0 && mount -r -t iso9660 /dev/cloop $1\n";
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    int length=strlen(magic_version_2_0);
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    if(length>buf_size)
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	length=buf_size;
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    if(!memcmp(magic_version_2_0,buf,length))
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	return 2;
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    return 0;
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}
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static int cloop_open(BlockDriverState *bs, const char *filename, int flags)
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{
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    BDRVCloopState *s = bs->opaque;
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    uint32_t offsets_size,max_compressed_block_size=1,i;
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    s->fd = open(filename, O_RDONLY | O_BINARY);
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    if (s->fd < 0)
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        return -errno;
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    bs->read_only = 1;
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    /* read header */
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    if(lseek(s->fd,128,SEEK_SET)<0) {
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cloop_close:
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	close(s->fd);
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	return -1;
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    }
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    if(read(s->fd,&s->block_size,4)<4)
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	goto cloop_close;
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    s->block_size=be32_to_cpu(s->block_size);
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    if(read(s->fd,&s->n_blocks,4)<4)
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	goto cloop_close;
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    s->n_blocks=be32_to_cpu(s->n_blocks);
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    /* read offsets */
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    offsets_size=s->n_blocks*sizeof(uint64_t);
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    if(!(s->offsets=(uint64_t*)malloc(offsets_size)))
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	goto cloop_close;
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    if(read(s->fd,s->offsets,offsets_size)<offsets_size)
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	goto cloop_close;
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    for(i=0;i<s->n_blocks;i++) {
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	s->offsets[i]=be64_to_cpu(s->offsets[i]);
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	if(i>0) {
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	    uint32_t size=s->offsets[i]-s->offsets[i-1];
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	    if(size>max_compressed_block_size)
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		max_compressed_block_size=size;
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	}
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    }
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    /* initialize zlib engine */
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    if(!(s->compressed_block = malloc(max_compressed_block_size+1)))
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	goto cloop_close;
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    94
    if(!(s->uncompressed_block = malloc(s->block_size)))
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    95
	goto cloop_close;
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    96
    if(inflateInit(&s->zstream) != Z_OK)
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    97
	goto cloop_close;
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    98
    s->current_block=s->n_blocks;
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    99
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   100
    s->sectors_per_block = s->block_size/512;
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   101
    bs->total_sectors = s->n_blocks*s->sectors_per_block;
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   102
    return 0;
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   103
}
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   104
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   105
static inline int cloop_read_block(BDRVCloopState *s,int block_num)
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   106
{
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diff changeset
   107
    if(s->current_block != block_num) {
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   108
	int ret;
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   109
        uint32_t bytes = s->offsets[block_num+1]-s->offsets[block_num];
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   110
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   111
	lseek(s->fd, s->offsets[block_num], SEEK_SET);
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diff changeset
   112
        ret = read(s->fd, s->compressed_block, bytes);
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   113
        if (ret != bytes)
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   114
            return -1;
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diff changeset
   115
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   116
	s->zstream.next_in = s->compressed_block;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   117
	s->zstream.avail_in = bytes;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   118
	s->zstream.next_out = s->uncompressed_block;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   119
	s->zstream.avail_out = s->block_size;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   120
	ret = inflateReset(&s->zstream);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   121
	if(ret != Z_OK)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   122
	    return -1;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   123
	ret = inflate(&s->zstream, Z_FINISH);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   124
	if(ret != Z_STREAM_END || s->zstream.total_out != s->block_size)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   125
	    return -1;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   126
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   127
	s->current_block = block_num;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   128
    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   129
    return 0;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   130
}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   131
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   132
static int cloop_read(BlockDriverState *bs, int64_t sector_num,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   133
                    uint8_t *buf, int nb_sectors)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   134
{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   135
    BDRVCloopState *s = bs->opaque;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   136
    int i;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   137
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   138
    for(i=0;i<nb_sectors;i++) {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   139
	uint32_t sector_offset_in_block=((sector_num+i)%s->sectors_per_block),
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   140
	    block_num=(sector_num+i)/s->sectors_per_block;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   141
	if(cloop_read_block(s, block_num) != 0)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   142
	    return -1;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   143
	memcpy(buf+i*512,s->uncompressed_block+sector_offset_in_block*512,512);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   144
    }
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   145
    return 0;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   146
}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   147
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   148
static void cloop_close(BlockDriverState *bs)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   149
{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   150
    BDRVCloopState *s = bs->opaque;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   151
    close(s->fd);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   152
    if(s->n_blocks>0)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   153
	free(s->offsets);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   154
    free(s->compressed_block);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   155
    free(s->uncompressed_block);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   156
    inflateEnd(&s->zstream);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   157
}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   158
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   159
BlockDriver bdrv_cloop = {
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   160
    "cloop",
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   161
    sizeof(BDRVCloopState),
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   162
    cloop_probe,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   163
    cloop_open,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   164
    cloop_read,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   165
    NULL,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   166
    cloop_close,
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff changeset
   167
};