9 *		Copyright (C) 1996-1999 SciTech Software, Inc.
41 *		Jason ported this file to u-boot to run the ATI video card BIOS
42 *		in u-boot. Made all the video memory be emulated during the
76 debugFlags  - Flags to enable debugging options (debug builds only)
77 memSize	    - Amount of memory to allocate for real mode machine
78 info	    - Pointer to default VGA device information
111 	_BE_bios_init((u32*)info->LowMem);  in BE_init()
120 info	    - Pointer to VGA device information to make current
132 	_BE_env.vgaInfo.function = info->function;  in BE_setVGA()
133 	_BE_env.vgaInfo.device = info->device;  in BE_setVGA()
134 	_BE_env.vgaInfo.bus = info->bus;  in BE_setVGA()
135 	_BE_env.vgaInfo.pcidev = info->pcidev;  in BE_setVGA()
137 	_BE_env.vgaInfo.pciInfo = info->pciInfo;  in BE_setVGA()
139 	_BE_env.vgaInfo.BIOSImage = info->BIOSImage;  in BE_setVGA()
140 	if (info->BIOSImage) {  in BE_setVGA()
141 		_BE_env.biosmem_base = (ulong) info->BIOSImage;  in BE_setVGA()
142 		_BE_env.biosmem_limit = 0xC0000 + info->BIOSImageLen - 1;  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()
149 		_BE_bios_init((u32 *) info->LowMem);  in BE_setVGA()
150 	memcpy((u8 *) M.mem_base, info->LowMem, sizeof(info->LowMem));  in BE_setVGA()
155 info	    - Pointer to VGA device information to retrieve current
164 	info->function = _BE_env.vgaInfo.function;  in BE_getVGA()
165 	info->device = _BE_env.vgaInfo.device;  in BE_getVGA()
166 	info->bus = _BE_env.vgaInfo.bus;  in BE_getVGA()
167 	info->pcidev = _BE_env.vgaInfo.pcidev;  in BE_getVGA()
169 	info->pciInfo = _BE_env.vgaInfo.pciInfo;  in BE_getVGA()
171 	info->BIOSImage = _BE_env.vgaInfo.BIOSImage;  in BE_getVGA()
172 	memcpy(info->LowMem, (u8 *) M.mem_base, sizeof(info->LowMem));  in BE_getVGA()
177 r_seg	- Segment for pointer to convert
178 r_off	- Offset for pointer to convert
184 NOTE:	The memory is *always* in little endian format, son on non-x86
193 		return (void *)(_BE_env.biosmem_base + addr - 0xC0000);  in BE_mapRealPointer()
195 		return (void *)(_BE_env.busmem_base + addr - 0xA0000);  in BE_mapRealPointer()
202 len	- Return the length of the VESA buffer
203 rseg	- Place to store VESA buffer segment
204 roff	- Place to store VESA buffer offset
212 NOTE:	The memory is *always* in little endian format, son on non-x86
236 seg	- Segment of code to call
237 off	- Offset of code to call
238 regs	- Real mode registers to load
239 sregs	- Real mode segment registers to load
249 	M.x86.R_EAX = regs->e.eax;  in BE_callRealMode()
250 	M.x86.R_EBX = regs->e.ebx;  in BE_callRealMode()
251 	M.x86.R_ECX = regs->e.ecx;  in BE_callRealMode()
252 	M.x86.R_EDX = regs->e.edx;  in BE_callRealMode()
253 	M.x86.R_ESI = regs->e.esi;  in BE_callRealMode()
254 	M.x86.R_EDI = regs->e.edi;  in BE_callRealMode()
255 	M.x86.R_DS = sregs->ds;  in BE_callRealMode()
256 	M.x86.R_ES = sregs->es;  in BE_callRealMode()
257 	M.x86.R_FS = sregs->fs;  in BE_callRealMode()
258 	M.x86.R_GS = sregs->gs;  in BE_callRealMode()
265 	((u8 *) M.mem_base)[0x4005] = 0xF1;	/* Illegal op-code */  in BE_callRealMode()
269 	M.x86.R_SS = SEG(M.mem_size - 2);  in BE_callRealMode()
270 	M.x86.R_SP = OFF(M.mem_size - 2) + 2;  in BE_callRealMode()
274 	regs->e.cflag = M.x86.R_EFLG & F_CF;  in BE_callRealMode()
275 	regs->e.eax = M.x86.R_EAX;  in BE_callRealMode()
276 	regs->e.ebx = M.x86.R_EBX;  in BE_callRealMode()
277 	regs->e.ecx = M.x86.R_ECX;  in BE_callRealMode()
278 	regs->e.edx = M.x86.R_EDX;  in BE_callRealMode()
279 	regs->e.esi = M.x86.R_ESI;  in BE_callRealMode()
280 	regs->e.edi = M.x86.R_EDI;  in BE_callRealMode()
281 	sregs->ds = M.x86.R_DS;  in BE_callRealMode()
282 	sregs->es = M.x86.R_ES;  in BE_callRealMode()
283 	sregs->fs = M.x86.R_FS;  in BE_callRealMode()
284 	sregs->gs = M.x86.R_GS;  in BE_callRealMode()
289 intno	- Interrupt number to execute
290 in	- Real mode registers to load
291 out	- Place to store resulting real mode registers
300 	M.x86.R_EAX = in->e.eax;  in BE_int86()
301 	M.x86.R_EBX = in->e.ebx;  in BE_int86()
302 	M.x86.R_ECX = in->e.ecx;  in BE_int86()
303 	M.x86.R_EDX = in->e.edx;  in BE_int86()
304 	M.x86.R_ESI = in->e.esi;  in BE_int86()
305 	M.x86.R_EDI = in->e.edi;  in BE_int86()
312 	M.x86.R_SS = SEG(M.mem_size - 1);  in BE_int86()
313 	M.x86.R_SP = OFF(M.mem_size - 1) - 1;  in BE_int86()
316 	out->e.cflag = M.x86.R_EFLG & F_CF;  in BE_int86()
317 	out->e.eax = M.x86.R_EAX;  in BE_int86()
318 	out->e.ebx = M.x86.R_EBX;  in BE_int86()
319 	out->e.ecx = M.x86.R_ECX;  in BE_int86()
320 	out->e.edx = M.x86.R_EDX;  in BE_int86()
321 	out->e.esi = M.x86.R_ESI;  in BE_int86()
322 	out->e.edi = M.x86.R_EDI;  in BE_int86()
323 	return out->x.ax;  in BE_int86()
328 intno	- Interrupt number to execute
329 in	- Real mode registers to load
330 out	- Place to store resulting real mode registers
331 sregs	- Real mode segment registers to load
340 	M.x86.R_EAX = in->e.eax;  in BE_int86x()
341 	M.x86.R_EBX = in->e.ebx;  in BE_int86x()
342 	M.x86.R_ECX = in->e.ecx;  in BE_int86x()
343 	M.x86.R_EDX = in->e.edx;  in BE_int86x()
344 	M.x86.R_ESI = in->e.esi;  in BE_int86x()
345 	M.x86.R_EDI = in->e.edi;  in BE_int86x()
346 	M.x86.R_DS = sregs->ds;  in BE_int86x()
347 	M.x86.R_ES = sregs->es;  in BE_int86x()
348 	M.x86.R_FS = sregs->fs;  in BE_int86x()
349 	M.x86.R_GS = sregs->gs;  in BE_int86x()
356 	M.x86.R_SS = SEG(M.mem_size - 1);  in BE_int86x()
357 	M.x86.R_SP = OFF(M.mem_size - 1) - 1;  in BE_int86x()
360 	out->e.cflag = M.x86.R_EFLG & F_CF;  in BE_int86x()
361 	out->e.eax = M.x86.R_EAX;  in BE_int86x()
362 	out->e.ebx = M.x86.R_EBX;  in BE_int86x()
363 	out->e.ecx = M.x86.R_ECX;  in BE_int86x()
364 	out->e.edx = M.x86.R_EDX;  in BE_int86x()
365 	out->e.esi = M.x86.R_ESI;  in BE_int86x()
366 	out->e.edi = M.x86.R_EDI;  in BE_int86x()
367 	sregs->ds = M.x86.R_DS;  in BE_int86x()
368 	sregs->es = M.x86.R_ES;  in BE_int86x()
369 	sregs->fs = M.x86.R_FS;  in BE_int86x()
370 	sregs->gs = M.x86.R_GS;  in BE_int86x()
371 	return out->x.ax;  in BE_int86x()