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Finally hook up the mkdir code to a syscall.

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Added a /bin/mkdir that makes directories. How very neat :^)
There are various limitations because of missing functionality.
This commit is contained in:
Andreas Kling 2018-11-18 14:57:41 +01:00
parent 303577df16
commit de4604ac95
26 changed files with 238 additions and 132 deletions
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53
Kernel/IDEDiskDevice.cpp
View file

@ -18,6 +18,7 @@
enum IDECommand : byte {
IDENTIFY_DRIVE = 0xEC,
READ_SECTORS = 0x21,
WRITE_SECTORS = 0x30,
};
enum IDEStatus : byte {
@ -64,11 +65,8 @@ bool IDEDiskDevice::readBlock(unsigned index, byte* out) const
bool IDEDiskDevice::writeBlock(unsigned index, const byte* data)
{
(void) index;
(void) data;
kprintf("IDEDiskDevice: writeBlock not implemented()\n");
notImplemented();
return false;
write_sectors(index, 1, data);
return true;
}
#ifdef DISK_DEBUG
@ -221,3 +219,48 @@ bool IDEDiskDevice::read_sectors(dword start_sector, word count, byte* outbuf)
return true;
}
bool IDEDiskDevice::write_sectors(dword start_sector, word count, const byte* data)
{
LOCKER(m_lock);
dbgprintf("%s(%u): IDEDiskDevice::write_sectors request (%u sector(s) @ %u)\n",
current->name().characters(),
current->pid(),
count,
start_sector);
disableIRQ();
auto chs = lba_to_chs(start_sector);
while (IO::in8(IDE0_STATUS) & BUSY);
//dbgprintf("IDEDiskDevice: Writing %u sector(s) @ LBA %u (%u/%u/%u)\n", count, start_sector, chs.cylinder, chs.head, chs.sector);
IO::out8(0x1F2, count == 256 ? 0 : LSB(count));
IO::out8(0x1F3, chs.sector);
IO::out8(0x1F4, LSB(chs.cylinder));
IO::out8(0x1F5, MSB(chs.cylinder));
IO::out8(0x1F6, 0xA0 | chs.head); /* 0xB0 for 2nd device */
IO::out8(0x3F6, 0x08);
IO::out8(IDE0_COMMAND, WRITE_SECTORS);
while (!(IO::in8(IDE0_STATUS) & DRQ));
byte status = IO::in8(0x1f7);
if (status & DRQ) {
//dbgprintf("Sending %u bytes (status=%b), data=%p...\n", count * 512, status, data);
auto* data_as_words = (const word*)data;
for (dword i = 0; i < (count * 512) / 2; ++i) {
IO::out16(IDE0_DATA, data_as_words[i]);
}
}
m_interrupted = false;
enableIRQ();
wait_for_irq();
return true;
}