MINDRVR read command don't work
Posted: Sat Feb 22, 2020 11:36 am
Hello again!
I tried to implement MINDRVR into my kernel. Copied "mindrvr.h" and "mindrvr.c", implemented requested functions and set regs values in header file.
But when I try to read data from disk, there are errors. The problem is that I can't understand the errors and I can't solve them.
Here the code comes:
This is how I call driver to init and read data:
Here are the functions required by driver:
Var "ata_int_raised" is changed by the interrupt handler.
I don't think this function cause problem, cos I disabled interrupts in driver.
And here is part of driver's header file, with config block:
Here is what QEMU show to me:
https://pasteboard.co/IVTgGTE.png
I have no idea to solve this. I tried code in QEMU and Bochs.
Cheers!
I tried to implement MINDRVR into my kernel. Copied "mindrvr.h" and "mindrvr.c", implemented requested functions and set regs values in header file.
But when I try to read data from disk, there are errors. The problem is that I can't understand the errors and I can't solve them.
Here the code comes:
This is how I call driver to init and read data:
Code: Select all
kprintf("Started config of kernel's ATA driver...\n");
reg_config(); // Start ATA driver,
kprintf("Kernel ATA driver configured!\n");
int x = reg_pio_data_in_lba48(0, CMD_READ_SECTORS, 0, 10, 0, 100, (unsigned char *)buffer, 10, 0);
if(x == 0) kprintf("OK data read");
else
{
kprintf("Error data read\n");
kprintf("Status register: ");
kprintf((const char *)reg_cmd_info.st);
kprintf((const char *)reg_cmd_info.ec);
kprintf((const char *)reg_cmd_info.er);
}
Code: Select all
int SYSTEM_WAIT_INTR_OR_TIMEOUT(void)
{
int x = 1000;
while(ata_int_raised == 0)
{
if(x != 5000)
{
kwait(x);
x += 1000;
}
else return 1;
}
return 0;
}
long SYSTEM_READ_TIMER(void)
{
return kticks; // Just ticks value incremented by PIT
}
I don't think this function cause problem, cos I disabled interrupts in driver.
And here is part of driver's header file, with config block:
Code: Select all
#define MIN_ATA_DRIVER_VERSION "0H"
//********************************************************************
//
// !!! What parts of MINDRVR do you want in your build?
//
//********************************************************************
#define INCLUDE_ATA_DMA 1 // not zero to include ATA_DMA
#define INCLUDE_ATAPI_PIO 1 // not zero to include ATAPI PIO
#define INCLUDE_ATAPI_DMA 0 // not zero to include ATAPI DMA
//********************************************************************
//
// !!! System specific functions and data you must supply
//
//********************************************************************
// You must supply a function that waits for an interrupt from the
// ATA controller. This function should return 0 when the interrupt
// is received and a non zero value if the interrupt is not received
// within the time out period.
extern int SYSTEM_WAIT_INTR_OR_TIMEOUT( void );
// You must supply a function that returns a system timer value. This
// should be a value that increments at some constant rate.
extern long SYSTEM_READ_TIMER( void );
// This defines the number of system timer ticks per second.
#define SYSTEM_TIMER_TICKS_PER_SECOND 18L
//********************************************************************
//
// !!! ATA controller hardware specific data
//
//********************************************************************
// ATA Command Block base address
// (the address of the ATA Data register)
#define PIO_BASE_ADDR1 ( (unsigned char *) 0x1F0 )
// ATA Control Block base address
// (the address of the ATA DevCtrl
// and AltStatus registers)
#define PIO_BASE_ADDR2 ( (unsigned char *) 0x3F6 )
// BMIDE base address (address of
// the BMIDE Command register for
// the Primary or Secondary side of
// the PCI ATA controller)
#define PIO_BMIDE_BASE_ADDR ( (unsigned char *) 0x1F7 )
// Size of the ATA Data register - allowed values are 8, 16 and 32
#define PIO_DEFAULT_XFER_WIDTH 16
// Interrupts or polling mode - not zero to use interrrupts
// Note: Interrupt mode is required for DMA
#define INT_DEFAULT_INTERRUPT_MODE 0
// Command time out in seconds
#define TMR_TIME_OUT 20
https://pasteboard.co/IVTgGTE.png
I have no idea to solve this. I tried code in QEMU and Bochs.
Cheers!