blob: 49dc6d137b9cceb60f40007d6c8b23227554dda1 (
plain) (
tree)
|
|
/*
* Debug routines which directly access the uart.
*/
#include <linux/types.h>
#include <asm/gt64120.h>
//#define SERIAL_BASE EV96100_UART0_REGS_BASE
#define SERIAL_BASE 0xBD000020
#define NS16550_BASE SERIAL_BASE
#define SERA_CMD 0x0D
#define SERA_DATA 0x08
//#define SERB_CMD 0x05
#define SERB_CMD 20
#define SERB_DATA 0x00
#define TX_BUSY 0x20
#define TIMEOUT 0xffff
#undef SLOW_DOWN
static const char digits[16] = "0123456789abcdef";
static volatile unsigned char *const com1 = (unsigned char *) SERIAL_BASE;
#ifdef SLOW_DOWN
static inline void slow_down()
{
int k;
for (k = 0; k < 10000; k++);
}
#else
#define slow_down()
#endif
void putch(const unsigned char c)
{
unsigned char ch;
int i = 0;
do {
ch = com1[SERB_CMD];
slow_down();
i++;
if (i > TIMEOUT) {
break;
}
} while (0 == (ch & TX_BUSY));
com1[SERB_DATA] = c;
}
void putchar(const unsigned char c)
{
unsigned char ch;
int i = 0;
do {
ch = com1[SERB_CMD];
slow_down();
i++;
if (i > TIMEOUT) {
break;
}
} while (0 == (ch & TX_BUSY));
com1[SERB_DATA] = c;
}
void puts(unsigned char *cp)
{
unsigned char ch;
int i = 0;
while (*cp) {
do {
ch = com1[SERB_CMD];
slow_down();
i++;
if (i > TIMEOUT) {
break;
}
} while (0 == (ch & TX_BUSY));
com1[SERB_DATA] = *cp++;
}
putch('\r');
putch('\n');
}
void fputs(unsigned char *cp)
{
unsigned char ch;
int i = 0;
while (*cp) {
do {
ch = com1[SERB_CMD];
slow_down();
i++;
if (i > TIMEOUT) {
break;
}
} while (0 == (ch & TX_BUSY));
com1[SERB_DATA] = *cp++;
}
}
void put64(uint64_t ul)
{
int cnt;
unsigned ch;
cnt = 16; /* 16 nibbles in a 64 bit long */
putch('0');
putch('x');
do {
cnt--;
ch = (unsigned char) (ul >> cnt * 4) & 0x0F;
putch(digits[ch]);
} while (cnt > 0);
}
void put32(unsigned u)
{
int cnt;
unsigned ch;
cnt = 8; /* 8 nibbles in a 32 bit long */
putch('0');
putch('x');
do {
cnt--;
ch = (unsigned char) (u >> cnt * 4) & 0x0F;
putch(digits[ch]);
} while (cnt > 0);
}
|
