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