diff options
Diffstat (limited to 'src/kernel/ata.c')
| -rw-r--r-- | src/kernel/ata.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/src/kernel/ata.c b/src/kernel/ata.c deleted file mode 100644 index 0e6cc4e..0000000 --- a/src/kernel/ata.c +++ /dev/null @@ -1,113 +0,0 @@ -#include <stdint.h> -#include "panic.h" -#include "util.h" -#include "ata.h" - -enum { - AP_PRIMARY = 0x01f0, - AP_SECONDARY = 0x0170, - - AP_DATA = 0x0, - AP_ERROR = 0x1, - AP_FEAT = 0x1, - AP_COUNT = 0x2, - AP_SEC = 0x3, - AP_CYL_L = 0x4, - AP_CYL_H = 0x5, - AP_HD_DR = 0x6, - AP_LBA0 = 0x3, - AP_LBA1 = 0x4, - AP_LBA2 = 0x5, - AP_L3_DR = 0x6, - AP_STAT = 0x7, - AP_CMD = 0x7, - - APC_STAT = 0x0206, - APC_CTRL = 0x0206, - APC_ADDR = 0x0207 -}; - -enum { - ADR_BASE = 0xa0, - ADR_CASCD = 0x10, - ADR_LBA = 0x40 -}; - -enum { - AS_ERROR = 0x01, - AS_INDEX = 0x02, - AS_CORRECT = 0x04, - AS_DREADY = 0x08, - AS_SERVICE = 0x10, - AS_FAULT = 0x20, - AS_READY = 0x40, - AS_BUSY = 0x80 -}; - -enum { - AC_READ = 0x20, - AC_WRITE = 0x30, - AC_FLUSH = 0xe7 -}; - -void ata_ldelay() { - uint16_t i = 65535; - while (i--) - ; -} - -void ata_sdelay() { - uint8_t i = 255; - while (i--) - ; -} - -void ata_dpoll() { - uint8_t s; - while ((s = inb(AP_PRIMARY | AP_STAT) & (AS_BUSY | AS_DREADY)) != AS_DREADY) - if (s & (AS_ERROR | AS_FAULT)) - panic("ATA controller error or fault."); -} - -uint8_t read_sectors(uint16_t start, uint8_t count, void *buffer) { - outb(AP_PRIMARY | AP_L3_DR, ADR_BASE | ADR_LBA); - outb(AP_PRIMARY | AP_LBA2, 0); - outb(AP_PRIMARY | AP_LBA1, start >> 8); - outb(AP_PRIMARY | AP_LBA0, start & 0xff); - outb(AP_PRIMARY | AP_COUNT, count); - outb(AP_PRIMARY | AP_CMD, AC_READ); - uint8_t i = count - 1; - uint16_t *ptr = buffer; - do { - ata_dpoll(); - uint8_t j = 255; - do - *(ptr++) = inw(AP_PRIMARY | AP_DATA); - while (j--); - ata_ldelay(); - } while (i--); - return count;//TODO: return early if necessary -} - -uint8_t write_sectors(uint16_t start, uint8_t count, void *buffer) { - outb(AP_PRIMARY | AP_L3_DR, ADR_BASE | ADR_LBA); - outb(AP_PRIMARY | AP_LBA2, 0); - outb(AP_PRIMARY | AP_LBA1, start >> 8); - outb(AP_PRIMARY | AP_LBA0, start & 0xff); - outb(AP_PRIMARY | AP_COUNT, count); - outb(AP_PRIMARY | AP_CMD, AC_WRITE); - uint8_t i = 0; - uint16_t *ptr = buffer; - do { - ata_dpoll(); - uint8_t j = 0; - do { - ata_sdelay(); - outw(AP_PRIMARY | AP_DATA, *(ptr++)); - } - while (++j); - ata_ldelay(); - } while (++i != count); - outb(AP_PRIMARY | AP_CMD, AC_FLUSH); - return count;//TODO: return early if necessary -}
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