still working on ata :(
This commit is contained in:
@@ -31,12 +31,96 @@ void scan_drives() {
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ide_devices[0].device = IDE_DRIVE_MASTER;
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ide_devices->type = type;
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atapi_identify_data_t* ident_result = (atapi_identify_data_t*)secondary_master_info_buffer;
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atapi_identify_t* ident_result = (atapi_identify_t*)secondary_master_info_buffer;
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ide_devices->ident_info_struct = (void*)ident_result;
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kprintf("Detected ATAPI master device on secondary bus\n");
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kprintf("Assigned ATAPI master device on secondary bus to drive %d\n", 0);
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uint8_t buf[2048];
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int rtn = read_atapi(IDE_SECONDARY_IO_BASE, IDE_DRIVE_MASTER, 0x10, 1, (uint16_t*)buf);
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if (rtn < 0) {
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if (rtn == -1) {
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kprintf("Read error, failed to send command\n");
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}
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if (rtn == -2) {
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kprintf("Read error, failed to read sector\n");
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}
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fix_ata_string(ident_result->model_num, 40);
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kprintf("Model Number: %s\n", ident_result->model_num);
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kprintf("Read error\n");
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return;
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}
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kprintf("Read first sector of drive\n");
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if (buf[0] != 0x01) {
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kprintf("First byte not valid for ISO drive\n");
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return;
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}
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if (buf[1] != 'C' || buf[2] != 'D') {
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kprintf("Magic bytes are invalid for ISO drive\n");
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return;
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}
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kprintf("ISO filesystem detected on drive\n");
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}
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}
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extern void outb(uint8_t port, uint8_t data);
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extern uint8_t inb(uint8_t port);
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extern void atapi_wait(uint16_t port);
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int read_atapi(uint16_t bus, uint8_t drive, uint32_t lba, uint32_t sectors, uint16_t* buf) {
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volatile uint8_t read_cmd[12] = {0xA8, 0,
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(lba >> 0x18) & 0xFF, (lba >> 0x10) & 0xFF, (lba >> 0x08) & 0xFF,
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(lba >> 0x00) & 0xFF,
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(sectors >> 0x18) & 0xFF, (sectors >> 0x10) & 0xFF, (sectors >> 0x08) & 0xFF,
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(sectors >> 0x00) & 0xFF,
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0, 0};
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outb(bus + IO_DRIVE_SELECT_REG, drive); // select drive
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atapi_wait(bus);
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outb(bus + IO_FEATURE_REG, 0x00);
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outb(bus + IO_LBA_MID_REG, 2048 & 0xFF);
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outb(bus + IO_LBA_HI_REG, 2048 >> 8);
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outb(bus + IO_CMD_REG, 0xA0);
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atapi_wait(bus);
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atapi_wait(bus);
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while (1) {
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kprintf("waiting bsy\n");
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uint8_t status = inb(bus + IO_STATUS_REG);
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if (status & STATUS_REG_BSY) {
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atapi_wait(bus);
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continue;
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}
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if (status & STATUS_REG_ERR)
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return -1;
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if (status & STATUS_REG_DRQ)
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break;
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atapi_wait(bus);
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}
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send_scsi_packet(bus, (void*)read_cmd, 6);
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for (uint32_t i = 0; i < sectors; i++) {
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while (1) {
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uint8_t status = inb(bus + IO_STATUS_REG);
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if (status & STATUS_REG_ERR)
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return -2;
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if (!(status & STATUS_REG_BSY) && (status & STATUS_REG_DRQ))
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break;
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atapi_wait(bus);
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}
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int bytes = inb(bus + IO_LBA_HI_REG) << 8 | inb(bus + IO_LBA_MID_REG);
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int words = bytes / 2;
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read_data_words(bus, ((uint8_t*)buf + i * 0x800), words);
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}
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return 0;
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}
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@@ -3,6 +3,7 @@
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#include <stddef.h>
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#endif
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#define IDE_PRIMARY_IO_BASE 0x01F0
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@@ -67,6 +68,9 @@
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#ifndef __ASSEMBLER__
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uint8_t ident_device(uint16_t bus, uint8_t drive_select, uint8_t* buffer);
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int read_atapi(uint16_t bus, uint8_t drive, uint32_t lba, uint32_t sectors, uint16_t* buf);
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void send_scsi_packet(uint16_t bus, void* cmd, size_t sz);
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void read_data_words(uint16_t bus, void* buf, size_t sz);
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typedef struct __attribute__((packed)) {
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uint16_t bus;
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@@ -75,18 +79,133 @@ typedef struct __attribute__((packed)) {
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void* ident_info_struct;
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} ide_device_t;
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typedef struct __attribute__((packed)) {
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uint16_t gen_config;
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uint16_t reserved_1[9];
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char serial_number[20];
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uint16_t vendor_1[3];
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char firmware_v[8];
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char model_num[40];
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uint16_t vendor_2[2];
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uint16_t capabilities;
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uint16_t reserved_2;
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uint16_t pio_dma_timing;
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} atapi_identify_data_t;
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typedef struct {
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// Word 0: General configuration bit-map
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struct {
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uint16_t packet_size : 2; // 00=12 bytes, 01=16 bytes
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uint16_t reserved1 : 3;
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uint16_t drq_response : 2; // DRQ response microsecond timing
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uint16_t device_type : 5; // Device type (e.g., 0x05 for CD/DVD-ROM)
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uint16_t reserved2 : 1;
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uint16_t removable_media : 1; // 1 = Removable media
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uint16_t command_packet_type : 2; // 10 = ATAPI device
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} general_config;
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uint16_t logical_cylinders;
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uint16_t specific_configuration; // Word 2: Specific configuration
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uint16_t logical_heads; // Word 3: Obsolete / Reserved
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uint16_t retired1[2]; // Words 4-5: Retired
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uint16_t logical_sectors_per_track; // Word 6: Obsolete / Reserved
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uint16_t reserved_vendor[3]; // Words 7-9: Vendor specific
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char serial_number[20]; // Words 10-19: Serial number (ASCII, byte-swapped)
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uint16_t retired2[2]; // Words 20-21: Retired
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uint16_t obsolete1; // Word 22: Obsolete
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char firmware_revision[8]; // Words 23-26: Firmware revision (ASCII, byte-swapped)
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char model_number[40]; // Words 27-46: Model number (ASCII, byte-swapped)
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uint16_t sectors_per_interrupt; // Word 47: Bits 7:0 = Max sectors per interrupt
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uint16_t reserved3; // Word 48: Reserved
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// Word 49: Capabilities
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struct {
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uint16_t reserved1 : 8;
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uint16_t dma_supported : 1; // 1 = DMA supported
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uint16_t lba_supported : 1; // 1 = LBA supported
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uint16_t iordy_disable : 1; // 1 = IORDY can be disabled
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uint16_t iordy_supported : 1; // 1 = IORDY supported
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uint16_t reserved2 : 1;
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uint16_t overlap_supported : 1; // 1 = Overlap operation supported
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uint16_t reserved3 : 2;
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} capabilities1;
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uint16_t capabilities2; // Word 50: Capabilities bit 0 = Min MDMA cycle time info
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uint16_t pio_data_transfer_timing;// Word 51: Obsolete
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uint16_t dma_data_transfer_timing;// Word 52: Obsolete
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// Word 53: Field validity
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struct {
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uint16_t fields_54_58_valid : 1; // 1 = Words 54-58 are valid
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uint16_t fields_64_70_valid : 1; // 1 = Words 64-70 are valid
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uint16_t field_88_valid : 1; // 1 = Word 88 is valid (Ultra DMA)
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uint16_t reserved : 13;
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} field_validity;
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uint16_t obsolete2[5]; // Words 54-58: Obsolete
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uint16_t multi_sector_setting; // Word 59: Multi-sector setting
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uint32_t total_addressable_sectors; // Words 60-61: Total number of user addressable sectors (LBA28)
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uint16_t single_word_dma_modes;
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uint16_t multi_word_dma_modes;
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struct {
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uint16_t pio_mode_3 : 1;
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uint16_t pio_mode_4 : 1;
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uint16_t reserved : 14;
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} advanced_pio_modes;
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uint16_t min_mwdma_cycle_time;
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uint16_t rec_mwdma_cycle_time;
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uint16_t min_pio_cycle_time_no_flow;
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uint16_t min_pio_cycle_time_iordy;
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uint16_t reserved4[2];
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uint16_t packet_release_time;
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uint16_t service_clear_time;
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uint16_t major_revision_number;
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uint16_t minor_revision_number;
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uint16_t queue_depth;
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uint16_t reserved5[4];
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uint16_t major_version;
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uint16_t minor_version;
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uint16_t command_sets_supported1;
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uint16_t command_sets_supported2;
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uint16_t command_sets_supported3;
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uint16_t command_sets_enabled1;
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uint16_t command_sets_enabled2;
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uint16_t command_sets_enabled3;
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uint16_t ultra_dma_modes;
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uint16_t reserved_erase_time[2];
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uint16_t current_apm_level;
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uint16_t master_password_revision;
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uint16_t hardware_reset_result;
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uint16_t obsolete3;
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uint16_t stream_minimum_request;
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uint16_t streaming_transfer_delay;
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uint16_t streaming_access_latency;
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uint32_t streaming_perf_granularity;
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uint64_t total_user_sectors_lba48;
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uint16_t streaming_transfer_delay_block;
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uint16_t reserved6;
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struct {
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uint16_t logical_sectors_per_physical : 4;
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uint16_t reserved1 : 8;
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uint16_t logical_sector_longer_than_256: 1;
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uint16_t physical_sector_longer_than_logical: 1;
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uint16_t validation_bits : 2;
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} physical_sector_size;
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uint16_t inter_seek_delay;
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uint16_t world_wide_name[4];
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uint16_t reserved7[8];
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uint16_t command_submission_delay;
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uint16_t reserved8[7];
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uint16_t security_status;
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uint16_t vendor_specific[31];
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uint16_t cfa_power_mode;
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uint16_t reserved9[15];
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char media_serial_number[60];
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uint16_t sct_command_transport;
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uint16_t reserved10[49];
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} __attribute__((packed)) atapi_identify_t;
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#endif
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@@ -2,18 +2,15 @@
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.code32
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.extern selected_drive_primary
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.extern selected_drive_secondary
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.global ident_device
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ident_device:
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push %ebp
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mov %esp, %ebp
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push %ebx
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push %ecx
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push %edx
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push $0
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push %esi
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push %edi
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push $0
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mov 8(%ebp), %ebx # ebx = bus base address
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mov 12(%ebp), %ecx # ecx = drive select mask
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@@ -24,6 +21,12 @@ ident_device:
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mov %cl, %al
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outb %al, (%dx)
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mov %ebx, %edx
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add $IO_STATUS_REG, %edx
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.rept 15
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inb (%dx), %al
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.endr
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xor %eax, %eax
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# clear sector count and LBA
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mov %ebx, %edx
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@@ -65,6 +68,7 @@ poll_status:
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test $STATUS_REG_BSY, %al
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jnz poll_status
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# first check if this is an ATA device
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check_ata:
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mov %ebx, %edx
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add $IO_LBA_MID_REG, %edx
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@@ -77,7 +81,7 @@ check_ata:
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inb (%dx), %al
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test %al, %al
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jnz check_atapi
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is_ata:
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mov $0x01, (%esp)
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jmp poll_drq
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@@ -118,6 +122,9 @@ poll_drq:
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add $IO_STATUS_REG, %edx
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inb (%dx), %al
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test $STATUS_REG_BSY, %al
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jnz poll_drq
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test $STATUS_REG_ERR, %al
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jnz error
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@@ -130,12 +137,12 @@ drq_set:
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mov 16(%ebp), %edi
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mov $256, %ecx
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cld
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read_data:
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inw (%dx), %ax
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mov %ax, (%edi)
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add $2, %edi
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loop read_data
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jmp done
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not_found:
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@@ -143,8 +150,78 @@ error:
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mov $0x0, (%esp)
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done:
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pop %eax
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pop %edx
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pop %ecx
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pop %edi
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pop %esi
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pop %ebx
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leave
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ret
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.global atapi_wait
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atapi_wait:
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push %ebp
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mov %esp, %ebp
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# 8(%ebp) bus
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mov 8(%ebp), %edx
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add $IO_STATUS_REG, %edx
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inb (%dx), %al
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inb (%dx), %al
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inb (%dx), %al
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inb (%dx), %al
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pop %edx
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leave
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ret
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.global send_scsi_packet
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send_scsi_packet:
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push %ebp
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mov %esp, %ebp
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push %esi
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push %ecx
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push %edx
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# 8(%ebp) bus
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# 12(%ebp) cmd
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# 16(%ebp) sz
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mov 8(%ebp), %edx
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add $IO_DATA_REG, %edx
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mov 12(%ebp), %esi
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mov 16(%ebp), %ecx
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cld
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rep outsw
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pop %edx
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pop %ecx
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pop %esi
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leave
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ret
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.global read_data_words
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read_data_words:
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push %ebp
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mov %esp, %ebp
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push %edi
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push %ecx
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push %edx
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# 8(%ebp) bus
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# 12(%ebp) buf
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# 16(%ebp) sz
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mov 8(%ebp), %edx
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add $IO_DATA_REG, %edx
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mov 12(%ebp), %edi
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mov 16(%ebp), %ecx
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cld
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rep insw
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pop %edx
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pop %ecx
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pop %edi
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leave
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ret
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Reference in New Issue
Block a user