static void
wakeup_ap (void)
{
u8 buf[5];
u8 *p;
/* Put a "ljmpw" instruction to the physical address 0 to
avoid the alignment restriction of the SIPI. */
p = mapmem_hphys (0, 5, MAPMEM_WRITE);
memcpy (buf, p, 5);
p[0] = 0xEA; /* ljmpw */
p[1] = wakeup_entry_addr & 0xF;
p[2] = 0;
p[3] = wakeup_entry_addr >> 4;
p[4] = wakeup_entry_addr >> 12;
ap_start_addr (0, wakeup_ap_loopcond, NULL);
memcpy (p, buf, 5);
unmapmem (p, 5);
}
static void
wakeup_ap (void)
{
u8 buf[5];
u8 *p;
/* Do nothing if no APs were started before suspend. It is
* true when there is only one logical processor for real or
* the guest OS uses BSP only on UEFI systems. */
if (num_of_processors + 1 == 1)
return;
/* Put a "ljmpw" instruction to the physical address 0 to
avoid the alignment restriction of the SIPI. */
p = mapmem_hphys (0, 5, MAPMEM_WRITE);
memcpy (buf, p, 5);
p[0] = 0xEA; /* ljmpw */
p[1] = wakeup_entry_addr & 0xF;
p[2] = 0;
p[3] = wakeup_entry_addr >> 4;
p[4] = wakeup_entry_addr >> 12;
ap_start_addr (0, wakeup_ap_loopcond, NULL);
memcpy (p, buf, 5);
unmapmem (p, 5);
}
