1 /* 2 * Copyright (c) 1998 Robert Nordier 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are freely 6 * permitted provided that the above copyright notice and this 7 * paragraph and the following disclaimer are duplicated in all 8 * such forms. 9 * 10 * This software is provided "AS IS" and without any express or 11 * implied warranties, including, without limitation, the implied 12 * warranties of merchantability and fitness for a particular 13 * purpose. 14 */ 15 16 #ifndef _BTXV86_H_ 17 #define _BTXV86_H_ 18 19 #include <sys/types.h> 20 #include <machine/psl.h> 21 22 /* 23 * Real memory buffer space for real mode IO. 24 * Just one page is not much, but the space is rather limited. 25 * See ../btx/btx.S for details. 26 */ 27 #define V86_IO_BUFFER 0x8000 28 #define V86_IO_BUFFER_SIZE 0x1000 29 30 #define V86_ADDR 0x10000 /* Segment:offset address */ 31 #define V86_CALLF 0x20000 /* Emulate far call */ 32 #define V86_FLAGS 0x40000 /* Return flags */ 33 34 struct __v86 { 35 uint32_t ctl; /* Control flags */ 36 uint32_t addr; /* Interrupt number or address */ 37 uint32_t es; /* V86 ES register */ 38 uint32_t ds; /* V86 DS register */ 39 uint32_t fs; /* V86 FS register */ 40 uint32_t gs; /* V86 GS register */ 41 uint32_t eax; /* V86 EAX register */ 42 uint32_t ecx; /* V86 ECX register */ 43 uint32_t edx; /* V86 EDX register */ 44 uint32_t ebx; /* V86 EBX register */ 45 uint32_t efl; /* V86 eflags register */ 46 uint32_t ebp; /* V86 EBP register */ 47 uint32_t esi; /* V86 ESI register */ 48 uint32_t edi; /* V86 EDI register */ 49 }; 50 51 extern struct __v86 __v86; /* V86 interface structure */ 52 void __v86int(void); 53 54 #define v86 __v86 55 #define v86int __v86int 56 57 extern u_int32_t __base; 58 extern u_int32_t __args; 59 60 #define PTOV(pa) ((caddr_t)(pa) - __base) 61 #define VTOP(va) ((vm_offset_t)(va) + __base) 62 #define VTOPSEG(va) (u_int16_t)(VTOP((caddr_t)va) >> 4) 63 #define VTOPOFF(va) (u_int16_t)(VTOP((caddr_t)va) & 0xf) 64 65 #define V86_CY(x) ((x) & PSL_C) 66 #define V86_ZR(x) ((x) & PSL_Z) 67 68 void __exit(int) __attribute__((__noreturn__)); 69 void __exec(caddr_t, ...); 70 71 #endif /* !_BTXV86_H_ */ 72