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/*
* Simulator hook mechanism
*/
#include "vcs_hook.h"
#include <asm/io.h>
#include <stdarg.h>
#define HOOK_TRIG_ADDR 0xb7000000
#define HOOK_MEM_BASE_ADDR 0xce000000
static volatile unsigned *hook_base;
#define HOOK_DATA(offset) hook_base[offset]
#define VHOOK_DATA(offset) hook_base[offset]
#define HOOK_TRIG(funcid) \
do { \
*((unsigned *) HOOK_TRIG_ADDR) = funcid; \
} while (0)
#define HOOK_DATA_BYTE(offset) ((unsigned char *)hook_base)[offset]
static void hook_init(void)
{
static int first = 1;
if (first) {
first = 0;
hook_base = ioremap(HOOK_MEM_BASE_ADDR, 8192);
}
}
static unsigned hook_trig(unsigned id)
{
unsigned ret;
/* preempt_disable(); */
/* Dummy read from mem to make sure data has propagated to memory
* before trigging */
ret = *hook_base;
/* trigger hook */
HOOK_TRIG(id);
/* wait for call to finish */
while (VHOOK_DATA(0) > 0) ;
/* extract return value */
ret = VHOOK_DATA(1);
return ret;
}
int hook_call(unsigned id, unsigned pcnt, ...)
{
va_list ap;
int i;
unsigned ret;
hook_init();
HOOK_DATA(0) = id;
va_start(ap, pcnt);
for (i = 1; i <= pcnt; i++)
HOOK_DATA(i) = va_arg(ap, unsigned);
va_end(ap);
ret = hook_trig(id);
return ret;
}
int hook_call_str(unsigned id, unsigned size, const char *str)
{
int i;
unsigned ret;
hook_init();
HOOK_DATA(0) = id;
HOOK_DATA(1) = size;
for (i = 0; i < size; i++)
HOOK_DATA_BYTE(8 + i) = str[i];
HOOK_DATA_BYTE(8 + i) = 0;
ret = hook_trig(id);
return ret;
}
void print_str(const char *str)
{
int i;
/* find null at end of string */
for (i = 1; str[i]; i++) ;
hook_call(hook_print_str, i, str);
}
void CPU_WATCHDOG_TIMEOUT(unsigned t)
{
}
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