kern: src/fs.c annotate

kern

- added the partition table parsing code - starting with the filesystem

author	John Tsiombikas <nuclear@member.fsf.org>
date	Thu, 08 Dec 2011 13:34:47 +0200
parents
children	2f555c81ae67

rev	line source
nuclear@88	1 #include <stdio.h>
nuclear@88	2 #include "fs.h"
nuclear@88	3 #include "ata.h"
nuclear@88	4 #include "part.h"
nuclear@88	5 #include "panic.h"
nuclear@88	6
nuclear@88	7 #define PART_TYPE 0xcc
nuclear@88	8
nuclear@88	9 static int find_rootfs(int dev, struct partition part);
nuclear@88	10
nuclear@88	11 /* root device & partition */
nuclear@88	12 static int rdev;
nuclear@88	13 static struct partition rpart;
nuclear@88	14
nuclear@88	15 void init_fs(void)
nuclear@88	16 {
nuclear@88	17 if(find_rootfs(&rdev, &rpart) == -1) {
nuclear@88	18 panic("can't find root filesystem\n");
nuclear@88	19 }
nuclear@88	20 }
nuclear@88	21
nuclear@88	22 static int find_rootfs(int dev, struct partition part)
nuclear@88	23 {
nuclear@88	24 int i, num_dev, partid;
nuclear@88	25 struct partition plist, p;
nuclear@88	26
nuclear@88	27 num_dev = ata_num_devices();
nuclear@88	28 for(i=0; i<num_dev; i++) {
nuclear@88	29 plist = p = get_part_list(i);
nuclear@88	30
nuclear@88	31 partid = 0;
nuclear@88	32 while(p) {
nuclear@88	33 if(get_part_type(p) == PART_TYPE) {
nuclear@88	34 /* found it! */
nuclear@88	35 printf("using ata%dp%d\n", i, partid);
nuclear@88	36 *dev = i;
nuclear@88	37 part = p;
nuclear@88	38 return 0;
nuclear@88	39 }
nuclear@88	40 p = p->next;
nuclear@88	41 partid++;
nuclear@88	42 }
nuclear@88	43 free_part_list(plist);
nuclear@88	44 }
nuclear@88	45 return -1;
nuclear@88	46 }