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Added serial debugging support

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svn path=/trunk/; revision=73
This commit is contained in:
Rex Jolliff 1998-10-20 05:54:29 +00:00
parent 37529daf35
commit 74ff8524ad
1 changed files with 57 additions and 1 deletions
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56
reactos/ntoskrnl/hal/x86/printk.c
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@ -16,11 +16,48 @@
#include <internal/mmhal.h>
#include <internal/hal/io.h>
//#define BOCHS_DEBUGGING 1
//#define SERIAL_DEBUGGING
#define SERIAL_PORT 0x03f8
#define SERIAL_BAUD_RATE 19200
#define SERIAL_LINE_CONTROL (SR_LCR_CS8 | SR_LCR_ST1 | SR_LCR_PNO)
//#define NDEBUG
#include <internal/debug.h>
/* GLOBALS ******************************************************************/
#ifdef BOCHS_DEBUGGING
#define BOCHS_LOGGER_PORT (0x3ed)
#endif
#ifdef SERIAL_DEBUGGING
#define SER_RBR SERIAL_PORT + 0
#define SER_THR SERIAL_PORT + 0
#define SER_DLL SERIAL_PORT + 0
#define SER_IER SERIAL_PORT + 1
#define SER_DLM SERIAL_PORT + 1
#define SER_IIR SERIAL_PORT + 2
#define SER_LCR SERIAL_PORT + 3
#define SR_LCR_CS5 0x00
#define SR_LCR_CS6 0x01
#define SR_LCR_CS7 0x02
#define SR_LCR_CS8 0x03
#define SR_LCR_ST1 0x00
#define SR_LCR_ST2 0x04
#define SR_LCR_PNO 0x00
#define SR_LCR_POD 0x08
#define SR_LCR_PEV 0x18
#define SR_LCR_PMK 0x28
#define SR_LCR_PSP 0x38
#define SR_LCR_BRK 0x40
#define SR_LCR_DLAB 0x80
#define SER_MCR SERIAL_PORT + 4
#define SR_MCR_DTR 0x01
#define SR_MCR_RTS 0x02
#define SER_LSR SERIAL_PORT + 5
#define SR_LSR_TBE 0x20
#define SER_MSR SERIAL_PORT + 6
#endif
/*
* PURPOSE: Current cursor position
@ -132,7 +169,15 @@ static void putchar(char c)
int offset;
int i;
#ifdef BOCHS_DEBUGGING
outb_p(BOCHS_LOGGER_PORT,c);
#endif
#ifdef SERIAL_DEBUGGING
while ((inb_p(SER_LSR) & SR_LSR_TBE) == 0)
;
outb_p(SER_THR, c);
#endif
switch(c)
{
@ -288,6 +333,17 @@ void HalInitConsole(boot_param* bp)
* bp = Parameters setup by the boot loader
*/
{
#ifdef SERIAL_DEBUGGING
/* turn on DTR and RTS */
outb_p(SER_MCR, SR_MCR_DTR | SR_MCR_RTS);
/* set baud rate, line control */
outb_p(SER_LCR, SERIAL_LINE_CONTROL | SR_LCR_DLAB);
outb_p(SER_DLL, (115200 / SERIAL_BAUD_RATE) & 0xff);
outb_p(SER_DLM, ((115200 / SERIAL_BAUD_RATE) >> 8) & 0xff);
outb_p(SER_LCR, SERIAL_LINE_CONTROL);
#endif
cursorx=bp->cursorx;
cursory=bp->cursory;
}