org

kernel/drivers/blk/ramblk/ramblk.c

@@ -0,0 +1,45 @@
+#include "./ramblk.h"
+#include "../../../memory/memory.h"
+#include "../blk.h"
+
+#define RAMFS_BYTES (1024 * 1024 * 5) // 5 MB
+#define SECTOR_SIZE (512)
+
+char ramfs_blocks[RAMFS_BYTES];
+
+uint32_t RAMBLK__read_sector(uint32_t device, uint32_t sector, char *out) {
+  if (sector * SECTOR_SIZE >= RAMFS_BYTES) {
+    // Out of bounds
+    return 0;
+  }
+
+  uint32_t byte = sector * SECTOR_SIZE;
+
+  memcpy(ramfs_blocks + byte, out, SECTOR_SIZE);
+  return 1;
+}
+
+uint32_t RAMBLK__write_sector(uint32_t device, uint32_t sector, char *in) {
+  if ((sector + 1) * SECTOR_SIZE >= RAMFS_BYTES) {
+    // Out of bounds
+    return 0;
+  }
+
+  uint32_t byte = sector * SECTOR_SIZE;
+
+  memcpy(in, ramfs_blocks + byte, SECTOR_SIZE);
+  return 1;
+}
+
+void RAMBLK__init() { 
+    memset(ramfs_blocks, 0x00, RAMFS_BYTES); 
+    struct block_dev bd = {
+        .name = "RAM_BLK",
+        .sector_size = SECTOR_SIZE,
+        .device_no = 0,
+        .num_sectors = RAMFS_BYTES / SECTOR_SIZE,
+        .read_sector = &RAMBLK__read_sector,
+        .write_sector = &RAMBLK__write_sector
+    };
+    BLK__register_device(&bd);
+}

kernel/drivers/blk/ramblk/ramblk.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <inttypes.h>
+
+void     RAMBLK__init();
+uint32_t RAMBLK__read_sector(uint32_t device, uint32_t sector, char *out);
+uint32_t RAMBLK__write_sector(uint32_t device, uint32_t sector, char *in);