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Merged mcb30-realmode-redesign back to HEAD

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This commit is contained in:
Michael Brown
2005-04-08 15:01:17 +00:00
parent de5d935135
commit 0ff80b477d
100 changed files with 4877 additions and 4263 deletions
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78
src/core/serial.c
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@@ -1,7 +1,3 @@
#include "etherboot.h"
#include "timer.h"
#ifdef CONSOLE_SERIAL
/*
* The serial port interface routines implement a simple polled i/o
* interface to a standard serial port. Due to the space restrictions
@@ -15,25 +11,27 @@
* parity, 1 stop bit (8N1). This can be changed in init_serial().
*/
static int found = 0;
#include "stddef.h"
#include "console.h"
#include "init.h"
#include "io.h"
#include "timer.h"
/* Set default values if none specified */
#ifndef COMCONSOLE
#define COMCONSOLE ( 0x3f8 )
#endif
#ifndef CONSPEED
#define CONSPEED ( 9600 )
#endif
#if defined(COMCONSOLE)
#undef UART_BASE
#define UART_BASE COMCONSOLE
#endif
#ifndef UART_BASE
#error UART_BASE not defined
#endif
#if defined(CONSPEED)
#undef UART_BAUD
#define UART_BAUD CONSPEED
#endif
#ifndef UART_BAUD
#define UART_BAUD 115200
#endif
#if ((115200%UART_BAUD) != 0)
#error Bad ttys0 baud rate
@@ -83,18 +81,15 @@ static int found = 0;
#define uart_writeb(val,addr) outb((val),(addr))
#endif
static struct console_driver serial_console;
/*
* void serial_putc(int ch);
* Write character `ch' to port UART_BASE.
*/
void serial_putc(int ch)
{
static void serial_putc ( int ch ) {
int i;
int status;
if (!found) {
/* no serial interface */
return;
}
i = 1000; /* timeout */
while(--i > 0) {
status = uart_readb(UART_BASE + UART_LSR);
@@ -111,8 +106,7 @@ void serial_putc(int ch)
* int serial_getc(void);
* Read a character from port UART_BASE.
*/
int serial_getc(void)
{
static int serial_getc ( void ) {
int status;
int ch;
do {
@@ -131,11 +125,8 @@ int serial_getc(void)
* If there is a character in the input buffer of port UART_BASE,
* return nonzero; otherwise return 0.
*/
int serial_ischar(void)
{
static int serial_ischar ( void ) {
int status;
if (!found)
return 0;
status = uart_readb(UART_BASE + UART_LSR); /* line status reg; */
return status & 1; /* rx char available */
}
@@ -144,15 +135,10 @@ int serial_ischar(void)
* int serial_init(void);
* Initialize port UART_BASE to speed CONSPEED, line settings 8N1.
*/
int serial_init(void)
{
int initialized = 0;
static void serial_init ( void ) {
int status;
int divisor, lcs;
if (found)
return 1;
divisor = COMBRD;
lcs = UART_LCS;
@@ -207,10 +193,9 @@ int serial_init(void)
/* line status reg */
status = uart_readb(UART_BASE + UART_LSR);
} while(status & UART_LSR_DR);
initialized = 1;
serial_console.disabled = 0;
out:
found = initialized;
return initialized;
return;
}
/*
@@ -218,10 +203,9 @@ int serial_init(void)
* Cleanup our use of the serial port, in particular flush the
* output buffer so we don't accidentially loose characters.
*/
void serial_fini(void)
{
static void serial_fini ( void ) {
int i, status;
if (!found) {
if (serial_console.disabled) {
/* no serial interface */
return;
}
@@ -232,5 +216,15 @@ void serial_fini(void)
do {
status = uart_readb(UART_BASE + UART_LSR);
} while((--i > 0) && !(status & UART_LSR_TEMPT));
/* Don't mark it as disabled; it's still usable */
}
#endif
static struct console_driver serial_console __console_driver = {
.putchar = serial_putc,
.getchar = serial_getc,
.iskey = serial_ischar,
.disabled = 1,
};
INIT_FN ( INIT_CONSOLE, serial_init, NULL, serial_fini );