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Began work FAT32 drivers in KBOOT

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This commit is contained in:
Tom-on
2025-01-10 11:30:24 +01:00
parent 23ab5d7bfb
commit 295e3d9c18
8 changed files with 220 additions and 27 deletions
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boot/stage2/entry.c
+32 -15
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@@ -1,24 +1,46 @@
#include "stdint.h"
#include "fat32.h"
#include "stdio.h"
#include "attr.h"
#include "defs.h"
#include "disk.h"
#include "menu.h"
#include "kbd.h"
noreturn void panic() {
setAttr(0x04);
text(COLS/2, ROWS/2, "[ PANIC ]");
while (1) __asm__ volatile ("cli; hlt");
}
void drawPartitions(struct MBR* mbr, uint8_t sel);
void partitonInfo(struct partition* part);
struct partition* menu(struct MBR* mbr);
__section("entry")
noreturn void main() {
keyboardInit();
struct MBR mbr;
readSectors(0, 1, &mbr);
struct partition* bootpart = menu(&mbr);
setAttr(0x0f);
cls();
showCursor();
if (fat32_init(bootpart) != 0) {
setAttr(0x0c);
printf("Failed to initialize FAT32.");
panic();
}
while (1);
}
struct partition* menu(struct MBR* mbr) {
// Select bootable partition by default
uint8_t selected = 0;
for (size_t i = 0; i < 4; i++) {
if (mbr.partitions[i].bootable != BOOTABLE) continue;
if (mbr->partitions[i].bootable != BOOTABLE) continue;
selected = i;
break;
}
@@ -31,14 +53,14 @@ noreturn void main() {
hline(0, 2, COLS);
setAttr(0x02);
text(COLS / 2, 1, "KBOOT");
drawPartitions(&mbr, selected);
partitonInfo(&mbr.partitions[selected]);
drawPartitions(mbr, selected);
partitonInfo(&mbr->partitions[selected]);
while (1) {
// Check for up/down arrow keys or enter
uint8_t scancode = getScancode();
if (scancode == SC_ENTER) { // Boot selected
if (mbr.partitions[selected].type != 0) break;
if (mbr->partitions[selected].type != 0) break;
// Don't allow booting an unused partition
setAttr(0x4f);
@@ -54,16 +76,11 @@ noreturn void main() {
else if (selected == 4) selected = 0;
// Redraw
drawPartitions(&mbr, selected);
partitonInfo(&mbr.partitions[selected]);
drawPartitions(mbr, selected);
partitonInfo(&mbr->partitions[selected]);
}
setAttr(0x0f);
cls();
showCursor();
printf("Booting from Partition %d...", selected);
while (1);
return &mbr->partitions[selected];
}
void drawPartitions(struct MBR* mbr, uint8_t sel) {