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disk: Remove redundant code used to get volume count

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This commit is contained in:
mintsuki 2021-08-22 18:05:21 +02:00
parent 9a934eb683
commit 712f4c02e6
1 changed files with 14 additions and 93 deletions
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107
stage23/drivers/disk.s2.c
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@ -12,6 +12,8 @@
#include <mm/pmm.h>
#include <sys/cpu.h>
#define MAX_VOLUMES 64
#if bios == 1
struct bios_drive_params {
@ -124,64 +126,16 @@ bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t
}
void disk_create_index(void) {
size_t volume_count = 0;
for (uint8_t drive = 0x80; drive < 0xf0; drive++) {
struct rm_regs r = {0};
struct bios_drive_params drive_params;
r.eax = 0x4800;
r.edx = drive;
r.ds = rm_seg(&drive_params);
r.esi = rm_off(&drive_params);
drive_params.buf_size = sizeof(struct bios_drive_params);
rm_int(0x13, &r, &r);
if (r.eflags & EFLAGS_CF)
continue;
if (drive_params.lba_count == 0 || drive_params.bytes_per_sect == 0)
continue;
struct volume block = {0};
block.drive = drive;
block.sector_size = drive_params.bytes_per_sect;
block.first_sect = 0;
block.sect_count = drive_params.lba_count;
if (drive_params.info_flags & (1 << 2)) {
// The medium could not be present (e.g.: CD-ROMs)
// Do a test run to see if we can actually read it
if (!disk_read_sectors(&block, NULL, 0, 1)) {
continue;
}
}
block.fastest_xfer_size = 8;
volume_count++;
for (int part = 0; ; part++) {
struct volume p = {0};
int ret = part_get(&p, &block, part);
if (ret == END_OF_TABLE || ret == INVALID_TABLE)
break;
if (ret == NO_PARTITION)
continue;
volume_count++;
}
}
volume_index = ext_mem_alloc(sizeof(struct volume) * volume_count);
volume_index = ext_mem_alloc(sizeof(struct volume) * MAX_VOLUMES);
int optical_indices = 1, hdd_indices = 1;
for (uint8_t drive = 0x80; drive < 0xf0; drive++) {
if (volume_index_i == MAX_VOLUMES) {
print("WARNING: TOO MANY VOLUMES!");
break;
}
struct rm_regs r = {0};
struct bios_drive_params drive_params;
@ -339,8 +293,6 @@ bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t
void disk_create_index(void) {
EFI_STATUS status;
size_t volume_count = 0;
EFI_GUID block_io_guid = BLOCK_IO_PROTOCOL;
EFI_HANDLE *handles = NULL;
UINTN handles_size = 0;
@ -353,47 +305,16 @@ void disk_create_index(void) {
uefi_call_wrapper(gBS->LocateHandle, 5, ByProtocol, &block_io_guid,
NULL, &handles_size, handles);
for (size_t i = 0; i < handles_size / sizeof(EFI_HANDLE); i++) {
struct volume block = {0};
EFI_BLOCK_IO *block_io = NULL;
status = uefi_call_wrapper(gBS->HandleProtocol, 3, handles[i],
&block_io_guid, (void **)&block_io);
if (status != 0 || block_io == NULL || block_io->Media->LastBlock == 0)
continue;
if (block_io->Media->LogicalPartition)
continue;
volume_count++;
block.efi_handle = handles[i];
block.sector_size = block_io->Media->BlockSize;
block.first_sect = 0;
block.sect_count = block_io->Media->LastBlock + 1;
block.fastest_xfer_size = 8;
for (int part = 0; ; part++) {
struct volume trash = {0};
int ret = part_get(&trash, &block, part);
if (ret == END_OF_TABLE || ret == INVALID_TABLE)
break;
if (ret == NO_PARTITION)
continue;
volume_count++;
}
}
volume_index = ext_mem_alloc(sizeof(struct volume) * volume_count);
volume_index = ext_mem_alloc(sizeof(struct volume) * MAX_VOLUMES);
int optical_indices = 1, hdd_indices = 1;
for (size_t i = 0; i < handles_size / sizeof(EFI_HANDLE); i++) {
if (volume_index_i == MAX_VOLUMES) {
print("WARNING: TOO MANY VOLUMES!");
break;
}
EFI_GUID disk_io_guid = DISK_IO_PROTOCOL;
EFI_DISK_IO *disk_io = NULL;