| #include <console/console.h> |
| #include <stdlib.h> |
| #include <stddef.h> |
| #include <stream/read_bytes.h> |
| #include <string.h> |
| |
| /* if they set the precompressed rom stream, they better have set a type */ |
| #if CONFIG_PRECOMPRESSED_PAYLOAD && ((!CONFIG_COMPRESSED_PAYLOAD_NRV2B) && (!CONFIG_COMPRESSED_PAYLOAD_LZMA)) |
| #error "You set CONFIG_PRECOMPRESSED_PAYLOAD but need to set CONFIG_COMPRESSED_PAYLOAD_NRV2B or CONFIG_COMPRESSED_PAYLOAD_LZMA" |
| #endif |
| |
| /* If they set ANY of these, then we're compressed */ |
| #if ((CONFIG_COMPRESSED_PAYLOAD_NRV2B) || (CONFIG_COMPRESSED_PAYLOAD_LZMA)) |
| #define UNCOMPRESSER 1 |
| extern unsigned char _heap, _eheap; |
| #endif |
| |
| #if (CONFIG_COMPRESSED_PAYLOAD_NRV2B) |
| #define HAVE_UNCOMPRESSER 1 |
| // include generic nrv2b |
| #include "../lib/nrv2b.c" |
| #endif |
| |
| #if (CONFIG_COMPRESSED_PAYLOAD_LZMA) |
| #if HAVE_UNCOMPRESSER |
| #error "You're defining more than one compression type, which is not allowed (of course)" |
| #endif |
| #define HAVE_UNCOMPRESSER 1 |
| // include generic nrv2b |
| #include "../lib/lzma.c" |
| #endif |
| |
| #ifndef CONFIG_ROM_STREAM_START |
| #define CONFIG_ROM_STREAM_START 0xffff0000UL |
| #endif |
| |
| /* well, this is a mess, and it will get fixed, but not right away. |
| * until we stop using 'ld' for building the rom image, that is. |
| * problem is, that on the sc520, ROM_STREAM_START has to be at 0x2000000. |
| * but if you set CONFIG_ROM_STREAM_START to that, then ld will try to |
| * build a giant image: 0x0-0x2000000, i.e. almost 4 GB. |
| * so make this non-static, non-const for now. |
| */ |
| |
| /*XXXXXXXXXXXXXX */ |
| /*static const */unsigned char *rom_start = (unsigned char *)CONFIG_ROM_STREAM_START; |
| /*static const */unsigned char *rom_end = (unsigned char *)(CONFIG_ROM_STREAM_START + PAYLOAD_SIZE - 1); |
| /*XXXXXXXXXXXXXX */ |
| |
| static const unsigned char *rom; |
| |
| #if UNCOMPRESSER |
| unsigned long |
| uncompress(uint8_t * rom_start, uint8_t *dest ) |
| { |
| #if (CONFIG_COMPRESSED_PAYLOAD_NRV2B) |
| unsigned long ilen; // used compressed stream length |
| return unrv2b(rom_start, dest, &ilen); |
| #endif |
| #if (CONFIG_COMPRESSED_PAYLOAD_LZMA) |
| return ulzma(rom_start, dest); |
| #endif |
| } |
| #endif |
| int stream_init(void) |
| { |
| #if (UNCOMPRESSER) |
| unsigned char *dest; |
| unsigned long olen; |
| #endif |
| |
| printk_debug("rom_stream: 0x%08lx - 0x%08lx\n", |
| (unsigned long)rom_start, |
| (unsigned long)rom_end); |
| |
| #if (UNCOMPRESSER) |
| |
| dest = &_eheap; /* need a good address on RAM */ |
| |
| #if _RAMBASE<0x00100000 |
| olen = *(unsigned int *)dest; |
| #if (CONFIG_CONSOLE_VGA==1) || (CONFIG_PCI_ROM_RUN == 1) |
| if((dest < 0xa0000) && ((dest+olen)>0xa0000)) { |
| dest = (CONFIG_LB_MEM_TOPK<<10); |
| } |
| #endif |
| if((dest < (unsigned char *) 0xf0000) && ((dest+olen)> (unsigned char *)0xf0000)) { //linuxbios tables etc |
| dest = (unsigned char *) (CONFIG_LB_MEM_TOPK<<10); |
| } |
| #endif |
| |
| /* ALL of those settings are too smart and also unsafe. Set the dest to 16 MB: |
| * known to be safe for LB for now, and mostly safe for all elf images we have tried. |
| * long term, this has got to be fixed. |
| */ |
| dest = (unsigned char *) (16 * 1024 * 1024); |
| printk_debug("Uncompressing to RAM 0x%08lx ", dest); |
| olen = uncompress((uint8_t *) rom_start, (uint8_t *)dest ); |
| printk_debug(" olen = 0x%08lx done.\n", olen); |
| rom_end = dest + olen - 1; |
| rom = dest; |
| #else |
| rom = rom_start; |
| #endif |
| |
| return 0; |
| } |
| |
| |
| void stream_fini(void) |
| { |
| return; |
| } |
| |
| byte_offset_t stream_skip(byte_offset_t count) |
| { |
| byte_offset_t bytes; |
| bytes = count; |
| if ((rom + bytes) > rom_end) { |
| printk_warning("%6d:%s() - overflowed source buffer\n", |
| __LINE__, __FUNCTION__); |
| bytes = 0; |
| if (rom <= rom_end) { |
| bytes = (rom_end - rom) + 1; |
| } |
| } |
| rom += bytes; |
| return bytes; |
| } |
| |
| byte_offset_t stream_read(void *vdest, byte_offset_t count) |
| { |
| unsigned char *dest = vdest; |
| const unsigned char *src = rom; |
| byte_offset_t bytes; |
| |
| bytes = stream_skip(count); |
| memcpy(dest, src, bytes); |
| return bytes; |
| } |