#include <com32.h>
#include <string.h>
#include "pci/pci.h"
uint32_t __pci_read_write_bios(uint32_t call, uint32_t v, pciaddr_t a)
{
com32sys_t rs;
memset(&rs, 0, sizeof rs);
rs.eax.w[0] = call;
rs.ebx.w[0] = a >> 8; /* bus:device:function */
rs.edi.b[0] = a; /* address:reg */
rs.ecx.l = v;
rs.eflags.l = EFLAGS_CF;
__intcall(0x1a, &rs, &rs);
return (rs.eflags.l & EFLAGS_CF) ? ~(uint32_t) 0 : rs.ecx.l;
}