start messing with fat32

src/disk.c

@@ -161,8 +161,9 @@ void ata_poll()
 
 //https://wiki.osdev.org/ATA_PIO_Mode
 //x86 directions section
-uint8_t ata_read(uint8_t *buffer, uint32_t lba)
+bool ata_read(uint8_t *buffer, uint32_t lba)
 {
+    printf("ata_read: 0x%X\n", lba);
 	outb(0x1F6, 0xE0 | ((lba >> 24) & 0x0F));//E0 is for master, F0 is for slave
 	//outb(0x1F1, 0x00);//TODO: this is probably ignored so could be removed maybe?
 	outb(0x1F2, 1);//1 is sector count, how many sectors are we reading
@@ -177,9 +178,10 @@ uint8_t ata_read(uint8_t *buffer, uint32_t lba)
 		*(uint16_t*)(buffer+i*2) = data;
 	}
 	ata_400ns_delay();
+	return true;
 }
 
-void ata_write(uint8_t *buffer, uint32_t lba)
+bool ata_write(const uint8_t *buffer, uint32_t lba)
 {
 	outb(0x1F6, 0xE0 | ((lba >> 24) & 0x0F));
 
@@ -197,4 +199,5 @@ void ata_write(uint8_t *buffer, uint32_t lba)
 		ata_400ns_delay();
 	}
 	outb(0x1F7, 0xE7);//Cache flush
+	return true;
 }

src/kernel.c

@@ -7,9 +7,90 @@
 #include "../include/pic.h"
 #include "../include/pit.h"
 #include "../include/paging.h"
+#include "../include/fat.h"
 
 #include <stdint.h>
 
+disk_ops_t ops =
+{
+	.read = ata_read,
+	.write = ata_write,
+};
+
+static fat_t g_fat;
+static const char* months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+
+static int cat(const char* path)
+{
+  file_t file;
+  int err = fat_fopen(&file, path, "r");
+  if (err)
+    return err;
+
+  uint8_t buf[512];
+  for (;;)
+  {
+    int cnt = fat_fread(&file, buf, 512);
+    if (cnt < 0)
+      return cnt;
+
+    printf("%.*s\n", cnt, buf);
+    if (cnt < 512)
+      break;
+  }
+
+  return fat_fclose(&file);
+}
+
+static int ls(const char* path)
+{
+  dir_t dir;
+  dir_info_t info;
+
+  printf("\nListing items in %s:\n\n", path);
+
+  int err = fat_opendir(&dir, path);
+  printf("opening %s\n", path);
+  if (err)
+    return err;
+
+  for (;;)
+  {
+    printf("reading dir...\n");
+
+    err = fat_readdir(&dir, &info);
+    if (err == FAT_ERR_EOF)
+      return FAT_ERR_NONE;
+    if (err)
+      return err;
+        
+    printf("%X   %s %d   %d:%d   %s%c\n",
+      info.size, months[info.modified.month], info.modified.day,
+      info.modified.hour, info.modified.min, 
+      info.namelen, info.name, info.attr & FAT_ATTR_DIR ? '/' : ' ');
+    
+    err = fat_nextdir(&dir);
+    if (err)
+      return err;
+  }
+}
+
+void file_fuckery()
+{
+	int err;
+	err = fat_mount(&ops, 0, &g_fat, "/");
+
+	if(err)
+		printf("KATYAKATYAKATYAKATYAKATYA: %X\n", err);
+	
+	printf("%X\n", FAT_ERR_NOFAT);
+
+	err = ls(".");
+	//err = fat_fclose(&file);
+	if(err)
+		printf("ERROR! %X\n", err);
+}
+
 void apply_pic_masks()
 {
 	//0x21 is master pic, 0xa1 is slave pic
@@ -37,6 +118,7 @@ void kmain()
 	disk_info info;
 	get_disk_info(&info);
 	printf("CYL HEAD SECT: %X %X %X\n", info.cylinders, info.heads, info.sectors);
+	file_fuckery();
 	while(1)
 	{
 /*		if(inportb(0x64) & 0x1)