i386/bios/apm.c

896 	struct vm86frame	vmf;
914 	bzero(&vmf, sizeof(struct vm86frame));		/* safety */
916 	vmf.vmf_ah = APM_BIOS;
917 	vmf.vmf_al = APM_INSTCHECK;
918 	vmf.vmf_bx = 0;
919 	if (vm86_intcall(APM_INT, &vmf))
921 	if (vmf.vmf_bx != 0x504d) {
922 		printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
925 	if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
930 	apm_version = vmf.vmf_ax;
931 	sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
932 	sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
933 	sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
935 	vmf.vmf_ah = APM_BIOS;
936 	vmf.vmf_al = APM_DISCONNECT;
937 	vmf.vmf_bx = 0;
938         vm86_intcall(APM_INT, &vmf);		/* disconnect, just in case */
942 	if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
955 	vmf.vmf_ah = APM_BIOS;
956 	vmf.vmf_al = APM_PROT32CONNECT;
957 	vmf.vmf_bx = 0;
958 	if (vm86_intcall(APM_INT, &vmf)) {
963 	sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
965 	sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
967 	sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
969 	sc->bios.entry = vmf.vmf_ebx;
972 	if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
973 		vmf.vmf_ah = APM_BIOS;
974 		vmf.vmf_al = APM_PROT32CONNECT;
975 		vmf.vmf_bx = 0;
976 		if (vm86_intcall(APM_INT, &vmf)) {
980 		sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
982 		sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
984 		sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
986 		sc->bios.entry = vmf.vmf_ebx;
990 		vmf.vmf_ah = APM_BIOS;
991 		vmf.vmf_al = APM_PROT16CONNECT;
992 		vmf.vmf_bx = 0;
993 		if (vm86_intcall(APM_INT, &vmf)) {
997 		sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
999 		sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
1001 		sc->bios.entry = vmf.vmf_bx;