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annotate cos/kernel/initrd.c @ 42:980b2f14c9be

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Merge
author windel
date Fri, 03 Feb 2012 18:01:18 +0100
parents 35cc54e078dd
children e47bfef80baf
rev   line source
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1 /*
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2 * Initial ramdisk filesystem driver.
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3 * */
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4
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5 #include "kernel.h"
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6
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7 // Global data struct:
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8 initrd_file_header_t *files;
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9
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10 fs_node_t* initialize_initrd(uint64_t location)
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11 {
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12 uint32_t *u32ptr;
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13
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14 u32ptr = (uint32_t*)location;
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15 if (*u32ptr != 0x1337babe)
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16 {
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17 printf("Invalid ramdisk magic\n");
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18 return 0;
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19 }
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20
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21 // Allocate root dir:
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22 fs_node_t *root = (fs_node_t*)kmalloc(sizeof(fs_node_t));
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23 memset(root, 0, sizeof(fs_node_t));
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24 root->flags = FS_DIRECTORY;
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25 root->readdir = initrd_readdir;
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26
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27 u32ptr++;
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28 root->length = *u32ptr;
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29
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30 // Allocate an node for each file.
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31 void *x = kmalloc(sizeof(fs_node_t) * root->length);
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32 memset(x, 0, sizeof(fs_node_t) * root->length);
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33
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34 for (i = 0; i < root->length; i++)
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35 {
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36
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37 }
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38
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39 return root;
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40 }
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41
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42 void load_ramdisk()
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43 {
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44 printf("Ramdisk location: %p\n", ramdisk_location);
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45
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46 fs_node_t *root = initialize_initrd(ramdisk_location);
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47
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48 if (root != 0)
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49 {
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50 fs_node_t *node = 0;
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51 int i = 0;
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52 while ( (node = readdir_fs(root, i)) != 0)
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53 {
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54 printf("File %s\n", node->name);
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55 }
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56 }
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57 }
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58
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59 static uint64_t initrd_read(fs_node_t *node, uint64_t offset, uint64_t size, void *buffer)
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60 {
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61 // TODO: check errors
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62
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63 if (size > node->length)
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64 {
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65 return 0;
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66 }
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67
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68 if (size + offset > node->length)
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69 {
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70 size = node->length - offset;
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71 }
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72
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73 memcpy(buffer, node.data + offset, size);
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74 return size;
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75 }
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76
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77 fs_node_t *readdir(fs_node_t *dir, int index)
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78 {
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79 if (index >= dir->length)
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80 {
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81 return 0;
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82 }
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83 }
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84