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#define FOOLOS_MODULE_NAME "spinlock"
#include "spinlock.h"
#include "kernel.h"
#include "lib/logger/log.h"
#include "x86.h"
// https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
static volatile uint32_t spinlocks[NUMBER_SPINLOCKS];
void check_spinlocks()
{
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Spinlocks at 0x%08X ",spinlocks);
for(int i=0;i<NUMBER_SPINLOCKS;i++)
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"%d",spinlocks[i]);
}
void lock_spin(uint32_t i)
{
uint32_t *addr=spinlocks+i;
// log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"locking %d (0x%08X)",i,addr);
while(x86_xchg(addr,1));
}
void lock_release(uint32_t i)
{
// log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"unlocking %d",i);
uint32_t *addr=spinlocks+i;
asm("movb $0,%0"::"m"(*addr));
}
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