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Rev 1508 Rev 1560
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;;                                                              ;;
 21 
;;                                                              ;;
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;;  See file COPYING for details                                ;;
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;;  See file COPYING for details                                ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 1508 $
 26 
$Revision: 1560 $
27 
 
 27 
 
28 
;***************************************************************************
 28 
;***************************************************************************
29 
;   Function
 29 
;   Function
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126 
;***************************************************************************
 126 
;***************************************************************************
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 127 
 
Line 128... Line 128...
128 
align 4
 128 
align 4
129 
 
 - 
 
130 
pci_read_reg:
 - 
 
131 
	cmp	byte [BOOT_VAR+0x9020],2 ;what mechanism will we use?
 - 
 
132 
	je	pci_read_reg_2
 - 
 
133 
 
 129 
 
134 
		; mechanism 1
 130 
pci_read_reg:
135 
	push	esi   ; save register size into ESI
 131 
	push	esi   ; save register size into ESI
Line 136... Line 132...
136 
	mov	esi,eax
 132 
	mov	esi,eax
Line 175... Line 171...
175 
	out	dx,eax
 171 
	out	dx,eax
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 172 
 
177 
	pop	eax
 173 
	pop	eax
178 
	pop	esi
 174 
	pop	esi
179 
	ret
 - 
 
180 
pci_read_reg_2:
 - 
 
181 
 
 - 
 
182 
	test	bh,128	;mech#2 only supports 16 devices per bus
 - 
 
183 
	jnz	pci_read_reg_err
 - 
 
184 
 
 - 
 
185 
	push esi   ; save register size into ESI
 - 
 
186 
	mov esi,eax
 - 
 
187 
	and esi,3
 - 
 
188 
 
 - 
 
189 
	push	eax
 - 
 
190 
		;store current state of config space
 - 
 
191 
	mov	dx,0xcf8
 - 
 
192 
	in	al,dx
 - 
 
193 
	mov	ah,al
 - 
 
194 
	mov	dl,0xfa
 - 
 
195 
	in	al,dx
 - 
 
196 
 
 - 
 
197 
	xchg	eax,[esp]
 - 
 
198 
		; out 0xcfa,bus
 - 
 
199 
	mov	al,ah
 - 
 
200 
	out	dx,al
 - 
 
201 
		; out 0xcf8,0x80
 - 
 
202 
	mov	dl,0xf8
 - 
 
203 
	mov	al,0x80
 - 
 
204 
	out	dx,al
 - 
 
205 
		; compute addr
 - 
 
206 
	shr	bh,3 ; func is ignored in mechanism 2
 - 
 
207 
	or	bh,0xc0
 - 
 
208 
	mov	dx,bx
 - 
 
209 
 
 - 
 
210 
	or	esi,esi
 - 
 
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	jz	pci_read_byte2
 - 
 
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	cmp	esi,1
 - 
 
213 
	jz	pci_read_word2
 - 
 
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	cmp	esi,2
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215 
	jz	pci_read_dword2
 - 
 
216 
	jmp	pci_fin_read2
 - 
 
217 
 
 - 
 
218 
pci_read_byte2:
 - 
 
219 
	in	al,dx
 - 
 
220 
	jmp pci_fin_read2
 - 
 
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pci_read_word2:
 - 
 
222 
	in	ax,dx
 - 
 
223 
	jmp pci_fin_read2
 - 
 
224 
pci_read_dword2:
 - 
 
225 
	in	eax,dx
 - 
 
226 
;       jmp pci_fin_read2
 - 
 
227 
pci_fin_read2:
 - 
 
228 
 
 - 
 
229 
		; restore configuration space
 - 
 
230 
	xchg	eax,[esp]
 - 
 
231 
	mov	dx,0xcfa
 - 
 
232 
	out	dx,al
 - 
 
233 
	mov	dl,0xf8
 - 
 
234 
	mov	al,ah
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235 
	out	dx,al
 - 
 
236 
 
 - 
 
237 
	pop	eax
 - 
 
238 
	pop	esi
 - 
 
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	ret
 175 
	ret
240 
 
 176 
 
241 
pci_read_reg_err:
 177 
pci_read_reg_err:
242 
	xor	eax,eax
 178 
	xor	eax,eax
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;***************************************************************************
 193 
;***************************************************************************
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 194 
 
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align 4
 195 
align 4
260 
 
 - 
 
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pci_write_reg:
 - 
 
262 
	cmp byte [BOOT_VAR+0x9020],2 ;what mechanism will we use?
 - 
 
263 
	je pci_write_reg_2
 - 
 
264 
 
 196 
 
265 
		; mechanism 1
 197 
pci_write_reg:
266 
	push	esi   ; save register size into ESI
 198 
	push	esi   ; save register size into ESI
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267 
	mov	esi,eax
 199 
	mov	esi,eax
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299 
	jmp pci_fin_write1
 231 
	jmp pci_fin_write1
300 
pci_write_dword1:
 232 
pci_write_dword1:
301 
	out	dx,eax
 233 
	out	dx,eax
302 
	jmp	pci_fin_write1
 234 
	jmp	pci_fin_write1
303 
pci_fin_write1:
 235 
pci_fin_write1:
304 
 
 - 
 
305 
		; restore configuration control
 236 
		; restore configuration control
306 
	pop	eax
 237 
	pop	eax
307 
	mov	dl,0xf8
 238 
	mov	dl,0xf8
308 
	out	dx,eax
 239 
	out	dx,eax
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 240 
 
310 
	xor	eax,eax
 241 
	xor	eax,eax
311 
	pop	esi
 - 
 
312 
 
 - 
 
313 
	ret
 - 
 
314 
pci_write_reg_2:
 - 
 
315 
 
 - 
 
316 
	test	bh,128	;mech#2 only supports 16 devices per bus
 - 
 
317 
	jnz	pci_write_reg_err
 - 
 
318 
 
 - 
 
319 
 
 - 
 
320 
	push esi   ; save register size into ESI
 - 
 
321 
	mov esi,eax
 - 
 
322 
	and esi,3
 - 
 
323 
 
 - 
 
324 
	push	eax
 - 
 
325 
		;store current state of config space
 - 
 
326 
	mov	dx,0xcf8
 - 
 
327 
	in	al,dx
 - 
 
328 
	mov	ah,al
 - 
 
329 
	mov	dl,0xfa
 - 
 
330 
	in	al,dx
 - 
 
331 
	xchg	eax,[esp]
 - 
 
332 
		; out 0xcfa,bus
 - 
 
333 
	mov	al,ah
 - 
 
334 
	out	dx,al
 - 
 
335 
		; out 0xcf8,0x80
 - 
 
336 
	mov	dl,0xf8
 - 
 
337 
	mov	al,0x80
 - 
 
338 
	out	dx,al
 - 
 
339 
		; compute addr
 - 
 
340 
	shr	bh,3 ; func is ignored in mechanism 2
 - 
 
341 
	or	bh,0xc0
 - 
 
342 
	mov	dx,bx
 - 
 
343 
		; write register
 - 
 
344 
	mov	eax,ecx
 - 
 
345 
 
 - 
 
346 
	or	esi,esi
 - 
 
347 
	jz	pci_write_byte2
 - 
 
348 
	cmp	esi,1
 - 
 
349 
	jz	pci_write_word2
 - 
 
350 
	cmp	esi,2
 - 
 
351 
	jz	pci_write_dword2
 - 
 
352 
	jmp	pci_fin_write2
 - 
 
353 
 
 - 
 
354 
pci_write_byte2:
 - 
 
355 
	out	dx,al
 - 
 
356 
	jmp pci_fin_write2
 - 
 
357 
pci_write_word2:
 - 
 
358 
	out	dx,ax
 - 
 
359 
	jmp pci_fin_write2
 - 
 
360 
pci_write_dword2:
 - 
 
361 
	out	dx,eax
 - 
 
362 
	jmp	pci_fin_write2
 - 
 
363 
pci_fin_write2:
 - 
 
364 
		; restore configuration space
 - 
 
365 
	pop	eax
 - 
 
366 
	mov	dx,0xcfa
 - 
 
367 
	out	dx,al
 - 
 
368 
	mov	dl,0xf8
 - 
 
369 
	mov	al,ah
 - 
 
370 
	out	dx,al
 - 
 
371 
 
 - 
 
372 
	xor	eax,eax
 - 
 
373 
	pop	esi
 242 
	pop	esi
Line 374... Line 243...
374 
	ret
 243 
	ret
375 
 
 244 
 
376 
pci_write_reg_err:
 245 
pci_write_reg_err: