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comparison cos/kernel/kernel.c @ 32:3a6a9b929db0

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Added initial ramdisk and some virtual file system functions
author windel
date Fri, 13 Jan 2012 18:18:17 +0100
parents 88590c42320f
children d8185ddb6c7b
comparison
equal deleted inserted replaced
31:88590c42320f 32:3a6a9b929db0
13 printf("Got b at %x\n", b); 13 printf("Got b at %x\n", b);
14 b[0] = 'B'; 14 b[0] = 'B';
15 kfree(a); 15 kfree(a);
16 } 16 }
17 17
18 multiboot_info_t *multiboot_info = 0; // Set by startup code.
19
18 /* This routine initializes the kernel. 20 /* This routine initializes the kernel.
19 * We are left here in 64-bit long mode with the first 6 MB identity mapped. 21 * We are left here in 64-bit long mode with the first 6 MB identity mapped.
20 * */ 22 * */
21 void kmain() 23 void kmain()
22 { 24 {
23 init_screen(); 25 init_screen();
24 setupIDT(); 26 setupIDT();
25 // init_heap(); 27
28 uint64_t available_memory = 0;
29
30 /* Display memory information from multiboot header */
31 if ((multiboot_info->flags & (1<<6)) == (1<<6))
32 {
33 multiboot_memory_map_t *mmap;
34 for (mmap = (multiboot_memory_map_t*)(uint64_t)multiboot_info->mmap_addr;
35 (uint64_t)mmap < multiboot_info->mmap_addr + multiboot_info->mmap_length;
36 mmap = (multiboot_memory_map_t*) ( (uint64_t)mmap + mmap->size + sizeof(mmap->size)) )
37 {
38 printf("size: %d, start: 0x%x, length=0x%x, type=%d\n", mmap->size, mmap->base, mmap->length, mmap->type);
39
40 if ( (mmap->type == 1) && (mmap->base == 0x100000) )
41 {
42 available_memory = mmap->length;
43 }
44 }
45 }
46
47 printf("Running with %d MB ram\n", available_memory / 1000000);
48
49 fs_node_t *fs_root = 0;
50
51 if ( (multiboot_info->flags & (1<<3)) == (1<<3))
52 {
53 printf("Mod count: %d\n", multiboot_info->mods_count);
54 uint64_t i;
55 multiboot_module_t *mod;
56 for (i=0, mod=(multiboot_module_t*)(uint64_t)multiboot_info->mods_addr; i<multiboot_info->mods_count; i++, mod++)
57 {
58 printf("Mod start: %x, end: %x\n", mod->mod_start, mod->mod_end);
59 if (i == 0)
60 {
61 uint64_t ramdisk_location = ((uint32_t*)((uint64_t)multiboot_info->mods_addr))[0];
62 fs_root = initialize_initrd(ramdisk_location);
63 }
64 }
65 }
66
67 if (fs_root != 0)
68 {
69 fs_dirent_t *node = 0;
70 int i = 0;
71 while ( (node = readdir_fs(fs_root, i)) != 0)
72 {
73
74 }
75 }
76
77 // TODO: Make sure that placement malloc does not overwrite the ramdisk.
78 printf("Mod size: ");
26 79
27 // Assume first 16MB: 80 // Assume first 16MB:
28 // TODO: get size from grub 81 // TODO: get size from grub
29 init_memory(0x1000000); 82 init_memory(0x1000000);
30 83
31 // TODO: make below a user space program! 84 // TODO: make below a user space program!
32 printf("Welcome!\n"); 85 printf("Welcome!\n");
86
33 87
34 while (1==1) 88 while (1==1)
35 { 89 {
36 char buffer[70]; 90 char buffer[70];
37 printf(">"); 91 printf(">");