e4fc0ab250
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1392 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
58 lines
1.2 KiB
C
58 lines
1.2 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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#ifndef CONFIG_ROM_STREAM_START
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#define CONFIG_ROM_STREAM_START 0xffff0000UL
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#endif
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static const unsigned char *rom_start = (void *)CONFIG_ROM_STREAM_START;
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static const unsigned char *rom_end = (void *)(CONFIG_ROM_STREAM_START + PAYLOAD_SIZE - 1);
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static const unsigned char *rom;
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int stream_init(void)
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{
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rom = rom_start;
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printk_debug("%6d:%s() - rom_stream: 0x%08lx - 0x%08lx\n",
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__LINE__, __FUNCTION__,
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(unsigned long)rom_start,
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(unsigned long)rom_end);
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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) > 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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