i386/bios/apm.c

895 	struct vm86frame	vmf;
913 	bzero(&vmf, sizeof(struct vm86frame));		/* safety */
915 	vmf.vmf_ah = APM_BIOS;
916 	vmf.vmf_al = APM_INSTCHECK;
917 	vmf.vmf_bx = 0;
918 	if (vm86_intcall(APM_INT, &vmf))
920 	if (vmf.vmf_bx != 0x504d) {
921 		printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
924 	if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
929 	apm_version = vmf.vmf_ax;
930 	sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
931 	sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
932 	sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
934 	vmf.vmf_ah = APM_BIOS;
935 	vmf.vmf_al = APM_DISCONNECT;
936 	vmf.vmf_bx = 0;
937         vm86_intcall(APM_INT, &vmf);		/* disconnect, just in case */
941 	if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
954 	vmf.vmf_ah = APM_BIOS;
955 	vmf.vmf_al = APM_PROT32CONNECT;
956 	vmf.vmf_bx = 0;
957 	if (vm86_intcall(APM_INT, &vmf)) {
962 	sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
964 	sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
966 	sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
968 	sc->bios.entry = vmf.vmf_ebx;
971 	if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
972 		vmf.vmf_ah = APM_BIOS;
973 		vmf.vmf_al = APM_PROT32CONNECT;
974 		vmf.vmf_bx = 0;
975 		if (vm86_intcall(APM_INT, &vmf)) {
979 		sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
981 		sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
983 		sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
985 		sc->bios.entry = vmf.vmf_ebx;
989 		vmf.vmf_ah = APM_BIOS;
990 		vmf.vmf_al = APM_PROT16CONNECT;
991 		vmf.vmf_bx = 0;
992 		if (vm86_intcall(APM_INT, &vmf)) {
996 		sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
998 		sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
1000 		sc->bios.entry = vmf.vmf_bx;