forked from AbleOS/ableos
theoretically works but is broken in practice :(
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36d50f6b38
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635ed1be42
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@ -510,7 +510,6 @@ fn run(release: bool, target: Target, do_accel: bool) -> Result<(), Error> {
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}
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}
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fn fetch_ovmf(target: Target) -> Result<String, OvmfFetchError> {
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let (ovmf_url, ovmf_path) = match target {
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Target::X86_64 | Target::X86_64Avx2 => (
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@ -1,67 +1,79 @@
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.{memory, buffer, log} := @use("../../../libraries/stn/src/lib.hb")
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.{memory, buffer, log} := @use("../../../libraries/stn/src/lib.hb");
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.{inb, outb} := memory
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// Influenced by https://github.com/levex/osdev/blob/master/drivers/ata.c
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regs := @use("regs.hb");
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.{ATA_PRIMARY_COMM_REGSTAT, ATA_PRIMARY_DRIVE_HEAD, ATA_PRIMARY_SECCOUNT, ATA_PRIMARY_LBA_LO, ATA_PRIMARY_LBA_MID, ATA_PRIMARY_LBA_HI, STAT_BSY} := regs
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main := fn(): int {
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// shuts down ableOS
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// memory.outb(0xF400, 0)
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sloop := fn(): void {
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idx := 0xFFFFFFF
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loop {
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if idx == 0 {
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break
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} else {
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idx -= 1
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}
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}
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}
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a := memory.inb(0x4600)
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b := memory.inb(0x4700)
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identify := fn(): u8 {
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a := inb(ATA_PRIMARY_COMM_REGSTAT)
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outb(ATA_PRIMARY_DRIVE_HEAD, 0xA0)
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log.info("Primary drive head set.\0")
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a = inb(ATA_PRIMARY_COMM_REGSTAT)
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outb(ATA_PRIMARY_SECCOUNT, 0)
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a = inb(ATA_PRIMARY_COMM_REGSTAT)
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outb(ATA_PRIMARY_LBA_LO, 0)
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a = inb(ATA_PRIMARY_COMM_REGSTAT)
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outb(ATA_PRIMARY_LBA_MID, 0)
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a = inb(ATA_PRIMARY_COMM_REGSTAT)
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outb(ATA_PRIMARY_LBA_HI, 0)
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a = inb(ATA_PRIMARY_COMM_REGSTAT)
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outb(ATA_PRIMARY_COMM_REGSTAT, 0xEC)
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outb(ATA_PRIMARY_COMM_REGSTAT, 0xE7)
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status := inb(ATA_PRIMARY_COMM_REGSTAT)
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log.info("Waiting for status.\0")
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loop {
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if (status & STAT_BSY) == 0 {
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break
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} else {
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sloop()
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}
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status = inb(ATA_PRIMARY_COMM_REGSTAT)
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}
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log.info("Status got\0")
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if status == 0 return 0
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log.info("Status indicates presence of a drive. Polling while STAT_BSY... \0")
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loop {
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if (status & STAT_BSY) == 0 {
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break
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} else {
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sloop()
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}
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status = inb(ATA_PRIMARY_COMM_REGSTAT)
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}
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mid := inb(ATA_PRIMARY_LBA_MID)
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hi := inb(ATA_PRIMARY_LBA_HI)
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if (mid | hi) == 0 {
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log.error("The drive is not ATA. (Who knows what it is.)\0")
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return 0
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}
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// c := buffer.search("XNumber\0")
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ata := ATA.new()
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return 0
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}
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main := fn(): int {
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// shuts down ableOS
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// outb(0xF400, 0)
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ATA_PRIMARY := @as(u8, @intcast(0x0))
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ATA_PRIMARY_IO := @as(u8, @intcast(0x1F0))
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a := inb(0x4600)
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b := inb(0x4700)
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ATA_SECONDARY := @as(u8, @intcast(0x1))
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ATA_SECONDARY_IO := @as(u8, @intcast(0x170))
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// c := buffer.search("XNumber\0")
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c := identify()
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ATA_REG_HDDEVSEL := @as(u8, @intcast(0x6))
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ATA_MASTER := @as(u8, @intcast(0x0))
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IDE := struct {}
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ide_select_drive := fn(bus: u8, i: u8): void {
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if bus == ATA_PRIMARY {
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if i == ATA_MASTER {
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log.info("Primary ATA selected\0")
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memory.outb(ATA_PRIMARY_IO + ATA_REG_HDDEVSEL, 0xA0)
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} else {
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memory.outb(ATA_PRIMARY_IO + ATA_REG_HDDEVSEL, 0xB0)
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}
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} else {
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if i == ATA_MASTER {
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memory.outb(ATA_SECONDARY_IO + ATA_REG_HDDEVSEL, 0xA0)
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} else {
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memory.outb(ATA_SECONDARY_IO + ATA_REG_HDDEVSEL, 0xB0)
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}
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}
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}
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identify := fn(bus: u8, drive: u8): bool {
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io := 0
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// BUG: Causes qemu to crash
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ide_select_drive(bus, drive)
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if bus == ATA_PRIMARY {
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io = ATA_PRIMARY_IO
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}
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return true
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}
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ata_probe := fn(): void {
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if identify(ATA_PRIMARY, ATA_MASTER) {
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}
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}
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ATA := struct {
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new := fn(): void {
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log.info("Checking for ATA Drives.\0")
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// ata_probe()
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}
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return 0
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}
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23
sysdata/programs/diskio_driver/src/regs.hb
Normal file
23
sysdata/programs/diskio_driver/src/regs.hb
Normal file
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@ -0,0 +1,23 @@
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$ATA_PRIMARY_DATA := @intcast(0x1F0)
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$ATA_PRIMARY_ERR := @intcast(0x1F1)
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$ATA_PRIMARY_SECCOUNT := @intcast(0x1F2)
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$ATA_PRIMARY_LBA_LO := @intcast(0x1F3)
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$ATA_PRIMARY_LBA_MID := @intcast(0x1F4)
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$ATA_PRIMARY_LBA_HI := @intcast(0x1F5)
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$ATA_PRIMARY_DRIVE_HEAD := @intcast(0x1F6)
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$ATA_PRIMARY_COMM_REGSTAT := @intcast(0x1F7)
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$ATA_PRIMARY_ALTSTAT_DCR := @intcast(0x3F6)
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// Indicates an error occurred. Send a new command to clear it
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STAT_ERR := 1 << 0
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// Set when the drive has PIO data to transfer, or is ready to accept PIO data.
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STAT_DRQ := 1 << 3
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// Overlapped Mode Service Request.
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STAT_SRV := 1 << 4
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// Drive Fault Error (does not set ERR).
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STAT_DF := 1 << 5
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// Bit is clear when drive is spun down, or after an error. Set otherwise.
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STAT_RDY := 1 << 6
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// Indicates the drive is preparing to send/receive data (wait for it to clear).
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// In case of 'hang' (it never clears), do a software reset.
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STAT_BSY := 1 << 7
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