50,6 → 50,7 |
#include <devmap.h> |
#include <sys/types.h> |
#include <errno.h> |
#include <bool.h> |
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#define NAME "ata_bd" |
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133,6 → 134,14 |
ER_AMNF = 0x01 /**< Address Mark Not Found */ |
}; |
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typedef struct { |
bool present; |
unsigned heads; |
unsigned cylinders; |
unsigned sectors; |
uint64_t blocks; |
} disk_t; |
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static const size_t block_size = 512; |
static size_t comm_size; |
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145,8 → 154,7 |
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static atomic_t dev_futex = FUTEX_INITIALIZER; |
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static unsigned heads, cylinders, sectors; |
static uint64_t disk_blocks; |
static disk_t disk[2]; |
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static int ata_bd_init(void); |
static void ata_bd_connection(ipc_callid_t iid, ipc_call_t *icall); |
154,12 → 162,14 |
void *buf); |
static int ata_bd_read_block(int disk_id, uint64_t blk_idx, size_t blk_cnt, |
void *buf); |
static int drive_identify(int drive_id, disk_t *d); |
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int main(int argc, char **argv) |
{ |
uint8_t status; |
uint16_t data; |
int i; |
char name[16]; |
int i, rc; |
int n_disks; |
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printf(NAME ": ATA disk driver\n"); |
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187,13 → 197,64 |
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printf("Status = 0x%x\n", pio_read_8(&cmd->status)); |
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printf("Issue drive_identify command\n"); |
pio_write_8(&cmd->drive_head, 0x00); |
(void) drive_identify(0, &disk[0]); |
(void) drive_identify(1, &disk[1]); |
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n_disks = 0; |
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for (i = 0; i < MAX_DISKS; i++) { |
/* Skip unattached drives. */ |
if (disk[i].present == false) |
continue; |
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snprintf(name, 16, "disk%d", i); |
rc = devmap_device_register(name, &dev_handle[i]); |
if (rc != EOK) { |
devmap_hangup_phone(DEVMAP_DRIVER); |
printf(NAME ": Unable to register device %s.\n", |
name); |
return rc; |
} |
++n_disks; |
} |
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if (n_disks == 0) { |
printf("No disks detected.\n"); |
return -1; |
} |
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printf(NAME ": Accepting connections\n"); |
async_manager(); |
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/* Not reached */ |
return 0; |
} |
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static int drive_identify(int disk_id, disk_t *d) |
{ |
uint16_t data; |
uint8_t status; |
int i; |
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printf("Identify drive %d\n", disk_id); |
pio_write_8(&cmd->drive_head, ((disk_id != 0) ? DHR_DRV : 0)); |
async_usleep(100); |
pio_write_8(&cmd->command, 0xEC); |
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printf("Status = 0x%x\n", pio_read_8(&cmd->status)); |
status = pio_read_8(&cmd->status); |
printf("Status = 0x%x\n", status); |
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d->present = false; |
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/* |
* Detect if drive is present. This is Qemu only! Need to |
* do the right thing to work with real drives. |
*/ |
if ((status & SR_DRDY) == 0) { |
printf("None attached.\n"); |
return ENOENT; |
} |
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for (i = 0; i < 256; i++) { |
do { |
status = pio_read_8(&cmd->status); |
202,30 → 263,28 |
data = pio_read_16(&cmd->data_port); |
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switch (i) { |
case 1: cylinders = data; break; |
case 3: heads = data; break; |
case 6: sectors = data; break; |
case 1: d->cylinders = data; break; |
case 3: d->heads = data; break; |
case 6: d->sectors = data; break; |
} |
} |
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printf("\n\nStatus = 0x%x\n", pio_read_8(&cmd->status)); |
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d->blocks = d->cylinders * d->heads * d->sectors; |
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printf("Geometry: %u cylinders, %u heads, %u sectors\n", |
cylinders, heads, sectors); |
disk_blocks = cylinders * heads * sectors; |
d->cylinders, d->heads, d->sectors); |
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printf(NAME ": Accepting connections\n"); |
async_manager(); |
d->present = true; |
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/* Not reached */ |
return 0; |
return EOK; |
} |
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static int ata_bd_init(void) |
{ |
void *vaddr; |
int rc, i; |
char name[16]; |
int rc; |
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rc = devmap_driver_register(NAME, ata_bd_connection); |
if (rc < 0) { |
249,16 → 308,6 |
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ctl = vaddr; |
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for (i = 0; i < MAX_DISKS; i++) { |
snprintf(name, 16, "disk%d", i); |
rc = devmap_device_register(name, &dev_handle[i]); |
if (rc != EOK) { |
devmap_hangup_phone(DEVMAP_DRIVER); |
printf(NAME ": Unable to register device %s.\n", |
name); |
return rc; |
} |
} |
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return EOK; |
} |
285,7 → 334,7 |
if (dev_handle[i] == dh) |
disk_id = i; |
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if (disk_id < 0) { |
if (disk_id < 0 || disk[disk_id].present == false) { |
ipc_answer_0(iid, EINVAL); |
return; |
} |
374,17 → 423,20 |
uint64_t c, h, s; |
uint64_t idx; |
uint8_t drv_head; |
disk_t *d; |
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d = &disk[disk_id]; |
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/* Check device bounds. */ |
if (blk_idx >= disk_blocks) |
if (blk_idx >= d->blocks) |
return EINVAL; |
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/* Compute CHS. */ |
c = blk_idx / (heads * sectors); |
idx = blk_idx % (heads * sectors); |
c = blk_idx / (d->heads * d->sectors); |
idx = blk_idx % (d->heads * d->sectors); |
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h = idx / sectors; |
s = 1 + (idx % sectors); |
h = idx / d->sectors; |
s = 1 + (idx % d->sectors); |
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/* New value for Drive/Head register */ |
drv_head = |