54328722ab
Adds a call that you can make to the BIOS to read sd blocks. Useful for the bootloader where there is not much space
29 lines
613 B
C
29 lines
613 B
C
#include <stdint.h>
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#include "devices/sd_card.h"
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#define BOOTSECTOR_LOAD_ADDRESS 0x1000
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#define BOOTSIG_0 0x55
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#define BOOTSIG_1 0xaa
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//Should probably do this in asm
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void load_bootsect() {
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uint32_t rca;
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uint8_t sig[2];
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sd_init();
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rca = sd_get_rca();
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sd_select_card(rca);
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sd_readblock(0, (uint8_t*)BOOTSECTOR_LOAD_ADDRESS);
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sig[0] = ((uint8_t*)BOOTSECTOR_LOAD_ADDRESS)[510];
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sig[1] = ((uint8_t*)BOOTSECTOR_LOAD_ADDRESS)[511];
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if (sig[0] != BOOTSIG_0 || sig[1] != BOOTSIG_1) {
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for(;;); //maybe figure out a way to have an error message here
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}
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return;
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} |