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#include <syscall.h>
#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
extern int _hardware;
/* _cpu_config==0 => Abel
* _cpu_config==1 => Zeta
* _cpu_config==2 => Phi
*/
extern int _cpu_config;
static volatile int *UART;
static volatile int *TIMER;
volatile int *MHZ;
/*
* Wait indefinitely for input byte
*/
int __attribute__ ((weak)) inbyte()
{
int val;
for (;;)
{
val=UART[1];
if ((val&0x100)!=0)
{
return val&0xff;
}
}
}
/*
* Output one character to the serial port
*
*
*/
void __attribute__ ((weak)) outbyte(int c)
{
/* Wait for space in FIFO */
while ((UART[0]&0x100)==0);
UART[0]=c;
}
static const int mhz=64;
void __attribute__ ((weak)) _initIO(void)
{
if (_hardware)
{
if (_cpu_config==2)
{
/* Phi board addresses */
UART=(volatile int *)0x080a000c;
TIMER=(volatile int *)0x080a0014;
MHZ=(volatile int *)&mhz;
} else
{
/* Abel board */
UART=(volatile int *)0xc000;
TIMER=(volatile int *)0x9000;
MHZ=(volatile int *)0x8800;
}
} else
{
UART=(volatile int *)0x80000024;
TIMER=(volatile int *)0x80000100;
MHZ=(volatile int *)0x80000200;
}
}
long long __attribute__ ((weak)) _readCycles()
{
long long clock;
unsigned int i;
TIMER[0]=0x2; /* sample timer */
clock=0;
for (i=0; i<2; i++)
{
clock|=((long long )(TIMER[i]))<<(i*32);
}
return clock;
}
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