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