Benji Dial
e8c6577617
big kernel additions: paging, elf loading, separate kernel and user page allocation it now properly loads and runs sd0:bin/init.elf still need to determine which disk was booted from, and start the init on that disk
60 lines
No EOL
1.5 KiB
C
60 lines
No EOL
1.5 KiB
C
#include "drive.h"
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#include "panic.h"
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#include "fat.h"
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uint8_t n_drives;
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struct drive drives[256];
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void init_drives() {
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n_drives = 0;
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}
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__attribute__ ((const))
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static file_id_t unknown_get_file(const struct drive *d, const char *path) {
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return 0;
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}
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static void unknown_free_file(const struct drive *d, file_id_t fid) {
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panic("Free file called on unknown file system");
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}
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static void unknown_load_sector(const struct drive *d, file_id_t fid, uint32_t sector, void *at) {
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panic("Load sector called on unknown file system");
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}
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static uint32_t unknown_get_file_length(const struct drive *d, file_id_t fid) {
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panic("Get file length called on unknown file system");
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}
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__attribute__ ((const))
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static uint32_t unknown_get_free_sectors(const struct drive *d) {
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return -1;
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}
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__attribute__ ((const))
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static uint32_t unknown_enumerate_dir(const struct drive *d, const char *path, struct directory_content_info *info, uint32_t max) {
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return 0;
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}
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static inline void determine_fs(struct drive *d) {
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if (try_fat_init_drive(d))
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return;
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d->fs_type = "Unknown";
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d->get_file = &unknown_get_file;
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d->free_file = &unknown_free_file;
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d->load_sector = &unknown_load_sector;
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d->get_file_length = &unknown_get_file_length;
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d->enumerate_dir = &unknown_enumerate_dir;
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d->get_free_sectors = &unknown_get_free_sectors;
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}
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//drive should be ready before this.
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//determine_fs and its children
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//do not need to make ready or done
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void commit_drive(struct drive data) {
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determine_fs(&data);
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drives[n_drives] = data;
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data.done(drives + n_drives);
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++n_drives;
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} |