52 BE_sysEnv _BE_env = {{0}};
71 #define OFF(addr)	(u16)(((addr) >> 0) & 0xffff)
72 #define SEG(addr)	(u16)(((addr) >> 4) & 0xf000)
82 BIOS image as the BIOS that is used and emulated at 0xC0000.
90 	memset(&M, 0, sizeof(M));  in BE_init()
93 		return 0;  in BE_init()
100 		return 0;  in BE_init()
104 	_BE_env.emulateVGA = 0;  in BE_init()
108 		return 0;  in BE_init()
142 		_BE_env.biosmem_limit = 0xC0000 + info->BIOSImageLen - 1;  in BE_setVGA()
144 		_BE_env.biosmem_base = _BE_env.busmem_base + 0x20000;  in BE_setVGA()
145 		_BE_env.biosmem_limit = 0xC7FFF;  in BE_setVGA()
147 	if ((info->LowMem[0] == 0) && (info->LowMem[1] == 0) &&  in BE_setVGA()
148 	    (info->LowMem[2] == 0) && (info->LowMem[3] == 0))  in BE_setVGA()
192 	if (addr >= 0xC0000 && addr <= _BE_env.biosmem_limit) {  in BE_mapRealPointer()
193 		return (void *)(_BE_env.biosmem_base + addr - 0xC0000);  in BE_mapRealPointer()
194 	} else if (addr >= 0xA0000 && addr <= 0xFFFFF) {  in BE_mapRealPointer()
195 		return (void *)(_BE_env.busmem_base + addr - 0xA0000);  in BE_mapRealPointer()
219 	*rseg = SEG(0x03C00);  in BE_getVESABuf()
220 	*roff = OFF(0x03C00);  in BE_getVESABuf()
260 	((u8 *) M.mem_base)[0x4000] = 0x9A;  in BE_callRealMode()
261 	((u8 *) M.mem_base)[0x4001] = (u8) off;  in BE_callRealMode()
262 	((u8 *) M.mem_base)[0x4002] = (u8) (off >> 8);  in BE_callRealMode()
263 	((u8 *) M.mem_base)[0x4003] = (u8) seg;  in BE_callRealMode()
264 	((u8 *) M.mem_base)[0x4004] = (u8) (seg >> 8);  in BE_callRealMode()
265 	((u8 *) M.mem_base)[0x4005] = 0xF1;	/* Illegal op-code */  in BE_callRealMode()
266 	M.x86.R_CS = SEG(0x04000);  in BE_callRealMode()
267 	M.x86.R_IP = OFF(0x04000);  in BE_callRealMode()
306 	((u8 *) M.mem_base)[0x4000] = 0xCD;  in BE_int86()
307 	((u8 *) M.mem_base)[0x4001] = (u8) intno;  in BE_int86()
308 	((u8 *) M.mem_base)[0x4002] = 0xF1;  in BE_int86()
309 	M.x86.R_CS = SEG(0x04000);  in BE_int86()
310 	M.x86.R_IP = OFF(0x04000);  in BE_int86()
350 	((u8 *) M.mem_base)[0x4000] = 0xCD;  in BE_int86x()
351 	((u8 *) M.mem_base)[0x4001] = (u8) intno;  in BE_int86x()
352 	((u8 *) M.mem_base)[0x4002] = 0xF1;  in BE_int86x()
353 	M.x86.R_CS = SEG(0x04000);  in BE_int86x()
354 	M.x86.R_IP = OFF(0x04000);  in BE_int86x()