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feat: reformatted driver code and linkage. Some optimizations

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This commit is contained in:
Rick Rongen
2021-03-06 19:57:47 +01:00
parent 645e18018d
commit 01efc5e98a
13 changed files with 110 additions and 130 deletions
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24
kernel/fs/mbr.c
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@@ -36,19 +36,6 @@ typedef struct {
uint32_t start_lba;
} mbr_block_driver_info;
uint8_t mbr_check_device(const block_device *device, uint8_t *first_sector);
block_dev_driver mbr_driver = {
.name = "mbr",
.flags.root_only = 1,
.check_device = mbr_check_device,
.free_device = NULL, // todo
};
void mbr_register_block_driver() {
block_dev_register_driver(&mbr_driver);
}
uint8_t mbr_block_dev_access(const block_device *device, uint8_t direction, uint32_t lba, uint8_t sectors, void *target) {
if (!device->flags.present || lba > device->num_lba) {
return BLOCK_DEV_ACCESS_ERR;
@@ -63,7 +50,7 @@ uint8_t mbr_block_dev_access(const block_device *device, uint8_t direction, uint
return info->device->access(info->device, direction, actual_lba, sectors, target);
}
uint8_t mbr_check_device(const block_device *device, uint8_t *first_sector) {
uint8_t used mbr_check_device(const block_device *device, uint8_t *first_sector) {
mbr_table table;
memcpy((uint8_t *) &table, first_sector + (device->block_size - sizeof(mbr_table)), sizeof(mbr_table));
if (table.signature[0] != 0x55 && table.signature[1] != 0xAA) { // AA 55 but in little endian
@@ -111,4 +98,11 @@ void mbr_read_from_ide(uint8_t ide_drive) {
mbr_partition_table_entry *entry = (mbr_partition_table_entry *) (mbr_data + 0x1BE);
printf("Start at %d, count: %d\n", entry->start_lba, entry->num_lbas);
free(mbr_data);
}
}
BLOCK_DEV_DRIVER(
.name = "mbr",
.flags.root_only = 1,
.check_device = mbr_check_device,
.free_device = NULL, // todo
);