mirror of
https://github.com/reactos/reactos.git
synced 2024-12-30 19:14:31 +00:00
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/*
|
|
* PROJECT: ReactOS Kernel
|
|
* LICENSE: BSD - See COPYING.ARM in the top level directory
|
|
* FILE: ntoskrnl/kd/arm/kdbg.c
|
|
* PURPOSE: Serial Port Kernel Debugging Transport Library
|
|
* PROGRAMMERS: ReactOS Portable Systems Group
|
|
*/
|
|
|
|
/* INCLUDES *******************************************************************/
|
|
|
|
#include <ntoskrnl.h>
|
|
#include <arm/peripherals/pl011.h>
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
/* GLOBALS ********************************************************************/
|
|
|
|
CPPORT DefaultPort = {0, 0, 0};
|
|
|
|
//
|
|
// We need to build this in the configuration root and use KeFindConfigurationEntry
|
|
// to recover it later.
|
|
//
|
|
#define HACK 24000000
|
|
|
|
/* REACTOS FUNCTIONS **********************************************************/
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
KdPortInitializeEx(IN PCPPORT PortInformation,
|
|
IN ULONG ComPortNumber)
|
|
{
|
|
ULONG Divider, Remainder, Fraction;
|
|
ULONG Baudrate = PortInformation->BaudRate;
|
|
|
|
//
|
|
// Calculate baudrate clock divider and remainder
|
|
//
|
|
Divider = HACK / (16 * Baudrate);
|
|
Remainder = HACK % (16 * Baudrate);
|
|
|
|
//
|
|
// Calculate the fractional part
|
|
//
|
|
Fraction = (8 * Remainder / Baudrate) >> 1;
|
|
Fraction += (8 * Remainder / Baudrate) & 1;
|
|
|
|
//
|
|
// Disable interrupts
|
|
//
|
|
WRITE_REGISTER_ULONG((PULONG)UART_PL011_CR, 0);
|
|
|
|
//
|
|
// Set the baud rate
|
|
//
|
|
WRITE_REGISTER_ULONG((PULONG)UART_PL011_IBRD, Divider);
|
|
WRITE_REGISTER_ULONG((PULONG)UART_PL011_FBRD, Fraction);
|
|
|
|
//
|
|
// Set 8 bits for data, 1 stop bit, no parity, FIFO enabled
|
|
//
|
|
WRITE_REGISTER_ULONG((PULONG)UART_PL011_LCRH,
|
|
UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN);
|
|
|
|
//
|
|
// Clear and enable FIFO
|
|
//
|
|
WRITE_REGISTER_ULONG((PULONG)UART_PL011_CR,
|
|
UART_PL011_CR_UARTEN |
|
|
UART_PL011_CR_TXE |
|
|
UART_PL011_CR_RXE);
|
|
|
|
//
|
|
// Done
|
|
//
|
|
return TRUE;
|
|
}
|
|
|
|
BOOLEAN
|
|
NTAPI
|
|
KdPortGetByteEx(IN PCPPORT PortInformation,
|
|
OUT PUCHAR ByteReceived)
|
|
{
|
|
UNIMPLEMENTED;
|
|
while (TRUE);
|
|
return FALSE;
|
|
}
|
|
|
|
VOID
|
|
NTAPI
|
|
KdPortPutByteEx(IN PCPPORT PortInformation,
|
|
IN UCHAR ByteToSend)
|
|
{
|
|
//
|
|
// Wait for ready
|
|
//
|
|
while ((READ_REGISTER_ULONG((PULONG)UART_PL01x_FR) & UART_PL01x_FR_TXFF) != 0);
|
|
|
|
//
|
|
// Send the character
|
|
//
|
|
WRITE_REGISTER_ULONG((PULONG)UART_PL01x_DR, ByteToSend);
|
|
}
|
|
|
|
/* EOF */
|