ext2 as multiboot2 module

1 files changed, 32 insertions, 0 deletions

diff --git a/kernel/src/devices/disc.c b/kernel/src/devices/disc.c
new file mode 100644
index 0000000..8d34473
--- /dev/null
+++ b/kernel/src/devices/disc.c
@@ -0,0 +1,32 @@
+#include <disc.h>
+#include <multiboot2.h>
+#include <libk/string.h>
+#include <paging.h>
+#include <libk/math.h>
+
+#define KERNEL_VMA 0xc0000000
+
+disc_sector_t* disc;
+
+void disc_init()
+{
+	disc = (disc_sector_t*)(uint64_t)ext2_module->mod_start;
+	if (disc == NULL) {
+		printf("Error opening disc\n");
+	}
+
+	uint32_t disc_size = ext2_module->mod_end - ext2_module->mod_start;
+	for (size_t i = 0; i < upper_div(disc_size, PAGE_SIZE) + 1; i++) {
+		map_addr((uint64_t)((char*)disc + i * PAGE_SIZE), (uint64_t)((char*)disc + i * PAGE_SIZE), FLAG_PRESENT | FLAG_WRITABLE | FLAG_HUGE);
+	}
+}
+
+void read_sector(size_t sector_num, disc_sector_t* disc_sector)
+{
+	memcpy(disc_sector, disc + sector_num, SECTOR_SIZE);
+}
+
+void write_sector(size_t sector_num, disc_sector_t* disc_sector)
+{
+	memcpy(disc + sector_num, disc_sector, SECTOR_SIZE);
+}