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// See LICENSE for license details.
#include "pk.h"
#include "atomic.h"
#include "frontend.h"
#include "sbi.h"
#include "mcall.h"
#include "syscall.h"
#include <stdint.h>
uint64_t tohost_sync(unsigned dev, unsigned cmd, uint64_t payload)
{
uint64_t fromhost;
__sync_synchronize();
sbi_device_message m = {dev, cmd, payload}, *p;
do_mcall(MCALL_SEND_DEVICE_REQUEST, &m);
while ((p = (void*)do_mcall(MCALL_RECEIVE_DEVICE_RESPONSE)) == 0);
kassert(p == &m);
__sync_synchronize();
return m.data;
}
long frontend_syscall(long n, uint64_t a0, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4, uint64_t a5, uint64_t a6)
{
static volatile uint64_t magic_mem[8];
static spinlock_t lock = SPINLOCK_INIT;
spinlock_lock(&lock);
magic_mem[0] = n;
magic_mem[1] = a0;
magic_mem[2] = a1;
magic_mem[3] = a2;
magic_mem[4] = a3;
magic_mem[5] = a4;
magic_mem[6] = a5;
magic_mem[7] = a6;
tohost_sync(0, 0, (uintptr_t)magic_mem);
long ret = magic_mem[0];
spinlock_unlock(&lock);
return ret;
}
void die(int code)
{
frontend_syscall(SYS_exit, code, 0, 0, 0, 0, 0, 0);
while (1);
}
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