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disk: Misc fixes

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This commit is contained in:
mintsuki 2021-08-22 22:07:48 +02:00
parent 483cb4655d
commit 16645dfb48
1 changed files with 7 additions and 6 deletions
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13
stage23/drivers/disk.s2.c
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@ -35,20 +35,19 @@ struct dap {
uint64_t lba;
};
static struct dap dap = {0};
#define XFER_BUF_SIZE 65536
#define XFER_BUF_SIZE (xfer_sizes[SIZEOF_ARRAY(xfer_sizes) - 1] * 512)
static const size_t xfer_sizes[] = { 1, 2, 4, 8, 16, 24, 32, 48, 64 };
static void *xfer_buf = NULL;
static size_t fastest_xfer_size(struct volume *volume) {
struct dap dap = {0};
if (xfer_buf == NULL)
xfer_buf = conv_mem_alloc(XFER_BUF_SIZE);
size_t fastest_size = 1;
uint64_t last_speed = (uint64_t)-1;
static const size_t xfer_sizes[] = { 1, 2, 4, 8, 16, 24, 32, 48, 64, 128 };
for (size_t i = 0; i < SIZEOF_ARRAY(xfer_sizes); i++) {
if (xfer_sizes[i] * volume->sector_size > XFER_BUF_SIZE) {
break;
@ -88,6 +87,8 @@ static size_t fastest_xfer_size(struct volume *volume) {
}
bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count) {
struct dap dap = {0};
if (count * volume->sector_size > XFER_BUF_SIZE)
panic("XFER");
@ -163,7 +164,7 @@ void disk_create_index(void) {
block->sect_count = drive_params.lba_count;
block->max_partition = -1;
if (drive_params.info_flags & (1 << 2)) {
if (drive_params.info_flags & (1 << 2) && drive > 0x8f) {
// 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)) {