WebSVN – Kolibri OS – Blame – /kernel/trunk/core/memory.inc

Rev	Author	Line No.	Line
431	serge	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
983	diamond	3	;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
431	serge	4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
164	serge	7
593	mikedld	8	$Revision: 1275 $
		9
		10
164	serge	11	align 4
		12	proc alloc_page
		13
		14	pushfd
		15	cli
660	serge	16	push ebx
164	serge	17	mov ebx, [page_start]
		18	mov ecx, [page_end]
		19	.l1:
		20	bsf eax,[ebx];
		21	jnz .found
		22	add ebx,4
		23	cmp ebx, ecx
		24	jb .l1
660	serge	25	pop ebx
164	serge	26	popfd
		27	xor eax,eax
		28	ret
		29	.found:
		30	btr [ebx], eax
		31	mov [page_start],ebx
		32	sub ebx, sys_pgmap
254	serge	33	lea eax, [eax+ebx*8]
164	serge	34	shl eax, 12
		35	dec [pg_data.pages_free]
660	serge	36	pop ebx
164	serge	37	popfd
		38	ret
		39	endp
		40
		41	align 4
		42	proc alloc_pages stdcall, count:dword
		43	pushfd
660	serge	44	push ebx
		45	push edi
164	serge	46	cli
		47	mov eax, [count]
		48	add eax, 7
		49	shr eax, 3
		50	mov [count], eax
		51	cmp eax, [pg_data.pages_free]
		52	ja .fail
		53
		54	mov ecx, [page_start]
		55	mov ebx, [page_end]
		56	.find:
		57	mov edx, [count]
		58	mov edi, ecx
		59	.match:
		60	cmp byte [ecx], 0xFF
		61	jne .next
		62	dec edx
		63	jz .ok
		64	inc ecx
		65	cmp ecx,ebx
		66	jb .match
660	serge	67	.fail:
		68	xor eax, eax
		69	pop edi
		70	pop ebx
164	serge	71	popfd
		72	ret
		73	.next:
		74	inc ecx
		75	cmp ecx, ebx
		76	jb .find
660	serge	77	pop edi
		78	pop ebx
164	serge	79	popfd
		80	xor eax, eax
		81	ret
		82	.ok:
		83	sub ecx, edi
		84	inc ecx
663	serge	85	push esi
164	serge	86	mov esi, edi
		87	xor eax, eax
		88	rep stosb
		89	sub esi, sys_pgmap
		90	shl esi, 3+12
		91	mov eax, esi
		92	mov ebx, [count]
		93	shl ebx, 3
		94	sub [pg_data.pages_free], ebx
663	serge	95	pop esi
660	serge	96	pop edi
		97	pop ebx
164	serge	98	popfd
		99	ret
		100	endp
		101
		102	align 4
		103	proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword
321	diamond	104	push ebx
164	serge	105	mov eax, [phis_addr]
		106	and eax, not 0xFFF
		107	or eax, [flags]
		108	mov ebx, [lin_addr]
		109	shr ebx, 12
365	serge	110	mov [page_tabs+ebx*4], eax
164	serge	111	mov eax, [lin_addr]
		112	invlpg [eax]
321	diamond	113	pop ebx
164	serge	114	ret
		115	endp
		116
		117	align 4
281	serge	118	map_space: ;not implemented
		119
		120
		121	ret
		122
		123
		124	align 4
164	serge	125	proc free_page
		126	;arg: eax page address
		127	pushfd
		128	cli
819	serge	129	shr eax, 12 ;page index
		130	bts dword [sys_pgmap], eax ;that's all!
291	serge	131	cmc
328	serge	132	adc [pg_data.pages_free], 0
164	serge	133	shr eax, 3
819	serge	134	and eax, not 3 ;dword offset from page_map
448	diamond	135	add eax, sys_pgmap
164	serge	136	cmp [page_start], eax
		137	ja @f
		138	popfd
		139	ret
		140	@@:
		141	mov [page_start], eax
		142	popfd
		143	ret
		144	endp
		145
741	serge	146	proc map_io_mem stdcall, base:dword, size:dword, flags:dword
		147
		148	push ebx
		149	push edi
		150	mov eax, [size]
		151	add eax, 4095
		152	and eax, -4096
		153	mov [size], eax
		154	stdcall alloc_kernel_space, eax
		155	test eax, eax
		156	jz .fail
		157	push eax
		158
		159	mov edi, 0x1000
		160	mov ebx, eax
		161	mov ecx,[size]
		162	mov edx, [base]
		163	shr eax, 12
		164	shr ecx, 12
		165	and edx, -4096
		166	or edx, [flags]
		167	@@:
		168	mov [page_tabs+eax*4], edx
819	serge	169	; push eax
1275	serge	170	invlpg [ebx]
819	serge	171	; pop eax
741	serge	172	inc eax
		173	add ebx, edi
		174	add edx, edi
		175	loop @B
		176
		177	pop eax
		178	mov edx, [base]
		179	and edx, 4095
		180	add eax, edx
		181	.fail:
		182	pop edi
		183	pop ebx
		184	ret
		185	endp
		186
279	serge	187	; param
328	serge	188	; eax= page base + page flags
819	serge	189	; ebx= linear address
281	serge	190	; ecx= count
		191
		192	align 4
328	serge	193	commit_pages:
741	serge	194	push edi
328	serge	195	test ecx, ecx
		196	jz .fail
281	serge	197
328	serge	198	mov edi, ebx
		199	mov ebx, pg_data.pg_mutex
		200	call wait_mutex ;ebx
		201
		202	mov edx, 0x1000
		203	mov ebx, edi
		204	shr ebx, 12
		205	@@:
365	serge	206	mov [page_tabs+ebx*4], eax
819	serge	207	; push eax
1275	serge	208	invlpg [edi]
819	serge	209	; pop eax
328	serge	210	add edi, edx
		211	add eax, edx
		212	inc ebx
		213	dec ecx
		214	jnz @B
		215	mov [pg_data.pg_mutex],ecx
		216	.fail:
741	serge	217	pop edi
281	serge	218	ret
		219
328	serge	220
281	serge	221	; param
279	serge	222	; eax= base
281	serge	223	; ecx= count
279	serge	224
164	serge	225	align 4
279	serge	226	release_pages:
321	diamond	227
		228	pushad
279	serge	229	mov ebx, pg_data.pg_mutex
		230	call wait_mutex ;ebx
		231
		232	mov esi, eax
		233	mov edi, eax
		234
		235	shr esi, 10
365	serge	236	add esi, page_tabs
328	serge	237
		238	mov ebp, [pg_data.pages_free]
279	serge	239	mov ebx, [page_start]
		240	mov edx, sys_pgmap
		241	@@:
		242	xor eax, eax
		243	xchg eax, [esi]
924	serge	244	push eax
279	serge	245	invlpg [edi]
924	serge	246	pop eax
279	serge	247
		248	test eax, 1
		249	jz .next
		250
		251	shr eax, 12
		252	bts [edx], eax
291	serge	253	cmc
328	serge	254	adc ebp, 0
279	serge	255	shr eax, 3
		256	and eax, -4
		257	add eax, edx
		258	cmp eax, ebx
		259	jae .next
		260
		261	mov ebx, eax
		262	.next:
		263	add edi, 0x1000
		264	add esi, 4
		265	dec ecx
		266	jnz @B
328	serge	267	mov [pg_data.pages_free], ebp
279	serge	268	and [pg_data.pg_mutex],0
321	diamond	269	popad
279	serge	270	ret
		271
819	serge	272	; param
		273	; eax= base
		274	; ecx= count
		275
279	serge	276	align 4
819	serge	277	unmap_pages:
		278
		279	push edi
		280
		281	mov edi, eax
		282	mov edx, eax
		283
		284	shr edi, 10
		285	add edi, page_tabs
		286
		287	xor eax, eax
		288	@@:
		289	stosd
		290	invlpg [edx]
		291	add edx, 0x1000
		292	loop @b
		293
		294	pop edi
		295	ret
		296
		297
		298	align 4
188	serge	299	proc map_page_table stdcall, lin_addr:dword, phis_addr:dword
321	diamond	300	push ebx
164	serge	301	mov ebx, [lin_addr]
		302	shr ebx, 22
		303	mov eax, [phis_addr]
		304	and eax, not 0xFFF
		305	or eax, PG_UW ;+PG_NOCACHE
378	serge	306	mov dword [master_tab+ebx*4], eax
164	serge	307	mov eax, [lin_addr]
		308	shr eax, 10
365	serge	309	add eax, page_tabs
164	serge	310	invlpg [eax]
321	diamond	311	pop ebx
164	serge	312	ret
		313	endp
		314
		315	align 4
		316	proc init_LFB
378	serge	317	locals
		318	pg_count dd ?
		319	endl
		320
164	serge	321	cmp dword [LFBAddress], -1
		322	jne @f
412	serge	323	mov [BOOT_VAR+0x901c],byte 2
164	serge	324	stdcall kernel_alloc, 0x280000
		325	mov [LFBAddress], eax
		326	ret
		327	@@:
		328	test [SCR_MODE],word 0100000000000000b
211	serge	329	jnz @f
412	serge	330	mov [BOOT_VAR+0x901c],byte 2
211	serge	331	ret
		332	@@:
490	serge	333	call init_mtrr
		334
378	serge	335	mov edx, LFB_BASE
		336	mov esi, [LFBAddress]
465	serge	337	mov edi, 0x00800000
379	serge	338	mov dword [exp_lfb+4], edx
214	serge	339
164	serge	340	shr edi, 12
		341	mov [pg_count], edi
		342	shr edi, 10
		343
		344	bt [cpu_caps], CAPS_PSE
		345	jnc .map_page_tables
		346	or esi, PG_LARGE+PG_UW
465	serge	347	mov edx, sys_pgdir+(LFB_BASE shr 20)
164	serge	348	@@:
465	serge	349	mov [edx], esi
378	serge	350	add edx, 4
164	serge	351	add esi, 0x00400000
		352	dec edi
		353	jnz @B
		354
207	serge	355	bt [cpu_caps], CAPS_PGE
		356	jnc @F
465	serge	357	or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL
207	serge	358	@@:
378	serge	359	mov dword [LFBAddress], LFB_BASE
164	serge	360	mov eax, cr3 ;flush TLB
		361	mov cr3, eax
		362	ret
		363
		364	.map_page_tables:
		365
465	serge	366	@@:
164	serge	367	call alloc_page
378	serge	368	stdcall map_page_table, edx, eax
389	serge	369	add edx, 0x00400000
164	serge	370	dec edi
465	serge	371	jnz @B
164	serge	372
		373	mov eax, [LFBAddress]
378	serge	374	mov edi, page_tabs + (LFB_BASE shr 10)
164	serge	375	or eax, PG_UW
		376	mov ecx, [pg_count]
378	serge	377	cld
389	serge	378	@@:
		379	stosd
		380	add eax, 0x1000
		381	dec ecx
		382	jnz @B
164	serge	383
378	serge	384	mov dword [LFBAddress], LFB_BASE
164	serge	385	mov eax, cr3 ;flush TLB
		386	mov cr3, eax
		387
		388	ret
		389	endp
		390
		391	align 4
		392	proc new_mem_resize stdcall, new_size:dword
		393
276	serge	394	mov ebx, pg_data.pg_mutex
		395	call wait_mutex ;ebx
164	serge	396
		397	mov edi, [new_size]
		398	add edi,4095
		399	and edi,not 4095
		400	mov [new_size], edi
		401
465	serge	402	mov edx,[current_slot]
		403	cmp [edx+APPDATA.heap_base],0
172	serge	404	jne .exit
		405
465	serge	406	mov esi, [edx+APPDATA.mem_size]
164	serge	407	add esi, 4095
		408	and esi, not 4095
		409
		410	cmp edi, esi
		411	jae .expand
		412
		413	shr edi, 12
		414	shr esi, 12
		415	@@:
378	serge	416	mov eax, [app_page_tabs+edi*4]
164	serge	417	test eax, 1
		418	jz .next
378	serge	419	mov dword [app_page_tabs+edi*4], 2
164	serge	420	mov ebx, edi
		421	shl ebx, 12
924	serge	422	push eax
659	serge	423	invlpg [ebx]
924	serge	424	pop eax
164	serge	425	call free_page
		426
		427	.next: add edi, 1
		428	cmp edi, esi
		429	jb @B
		430
		431	.update_size:
465	serge	432	mov ebx, [new_size]
		433	call update_mem_size
164	serge	434
		435	xor eax, eax
		436	dec [pg_data.pg_mutex]
		437	ret
		438	.expand:
		439
		440	push esi
		441	push edi
		442
		443	add edi, 0x3FFFFF
		444	and edi, not(0x3FFFFF)
		445	add esi, 0x3FFFFF
		446	and esi, not(0x3FFFFF)
		447
		448	cmp esi, edi
		449	jae .grow
		450
		451	xchg esi, edi
		452
		453	@@:
		454	call alloc_page
		455	test eax, eax
1103	diamond	456	jz .exit_pop
164	serge	457
188	serge	458	stdcall map_page_table, edi, eax
164	serge	459
		460	push edi
		461	shr edi, 10
365	serge	462	add edi, page_tabs
164	serge	463	mov ecx, 1024
		464	xor eax, eax
		465	cld
		466	rep stosd
		467	pop edi
		468
		469	add edi, 0x00400000
		470	cmp edi, esi
		471	jb @B
		472	.grow:
		473	pop edi
		474	pop esi
		475	@@:
		476	call alloc_page
		477	test eax, eax
		478	jz .exit
		479	stdcall map_page,esi,eax,dword PG_UW
		480
		481	push edi
		482	mov edi, esi
		483	xor eax, eax
		484	mov ecx, 1024
		485	cld
		486	rep stosd
		487	pop edi
		488
		489	add esi, 0x1000
		490	cmp esi, edi
294	diamond	491	jb @B
164	serge	492
		493	jmp .update_size
1103	diamond	494	.exit_pop:
		495	pop edi
		496	pop esi
164	serge	497	.exit:
		498	xor eax, eax
		499	inc eax
		500	dec [pg_data.pg_mutex]
		501	ret
		502	endp
		503
294	diamond	504	update_mem_size:
465	serge	505	; in: edx = slot base
294	diamond	506	; ebx = new memory size
		507	; destroys eax,ecx,edx
		508
465	serge	509	mov [APPDATA.mem_size+edx],ebx
294	diamond	510	;search threads and update
		511	;application memory size infomation
465	serge	512	mov ecx,[APPDATA.dir_table+edx]
294	diamond	513	mov eax,2
		514
		515	.search_threads:
		516	;eax = current slot
		517	;ebx = new memory size
		518	;ecx = page directory
		519	cmp eax,[TASK_COUNT]
		520	jg .search_threads_end
		521	mov edx,eax
		522	shl edx,5
		523	cmp word [CURRENT_TASK+edx+TASKDATA.state],9 ;if slot empty?
		524	jz .search_threads_next
		525	shl edx,3
380	serge	526	cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread?
294	diamond	527	jnz .search_threads_next
380	serge	528	mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size
294	diamond	529	.search_threads_next:
		530	inc eax
		531	jmp .search_threads
		532	.search_threads_end:
		533	ret
		534
285	serge	535	; param
		536	; eax= linear address
		537	;
		538	; retval
		539	; eax= phisical page address
		540
164	serge	541	align 4
285	serge	542	get_pg_addr:
		543	shr eax, 12
365	serge	544	mov eax, [page_tabs+eax*4]
164	serge	545	and eax, 0xFFFFF000
		546	ret
		547
465	serge	548
188	serge	549	align 4
1105	Galkov	550	; Now it is called from core/sys32::exc_c (see stack frame there)
164	serge	551	proc page_fault_handler
465	serge	552
1056	Galkov	553	.err_addr equ ebp-4
709	diamond	554
1105	Galkov	555	push ebx ;save exception number (#PF)
1056	Galkov	556	mov ebp, esp
		557	mov ebx, cr2
1105	Galkov	558	push ebx ;that is locals: .err_addr = cr2
1056	Galkov	559	inc [pg_data.pages_faults]
465	serge	560
		561	; push eax
		562	; push edx
		563	; mov edx, 0x400 ;bochs
		564	; mov al,0xff ;bochs
		565	; out dx, al ;bochs
		566	; pop edx
		567	; pop eax
164	serge	568
1056	Galkov	569	mov eax, [pf_err_code]
164	serge	570
1056	Galkov	571	cmp ebx, OS_BASE ;ebx == .err_addr
		572	jb .user_space ;�� ;
188	serge	573
1056	Galkov	574	cmp ebx, page_tabs
		575	jb .kernel_space ;��
164	serge	576
1056	Galkov	577	cmp ebx, kernel_tabs
		578	jb .alloc;.app_tabs ;�� ;
		579	;��
		580	if 0 ;��
		581	cmp ebx, LFB_BASE
		582	jb .core_tabs ;��
		583	;��
		584	.lfb:
		585	;�� LFB
		586	;��
		587	jmp .fail
		588	end if
		589	.core_tabs:
		590	.fail: ;simply return to caller
		591	mov esp, ebp
1105	Galkov	592	pop ebx ;restore exception number (#PF)
1056	Galkov	593	ret
378	serge	594
164	serge	595	.user_space:
1056	Galkov	596	test eax, PG_MAP
		597	jnz .err_access ;��
		598	;�� ?
465	serge	599
1056	Galkov	600	shr ebx, 12
		601	mov ecx, ebx
		602	shr ecx, 10
		603	mov edx, [master_tab+ecx*4]
		604	test edx, PG_MAP
		605	jz .fail ;��
		606	;��
172	serge	607
1056	Galkov	608	mov eax, [page_tabs+ebx*4]
		609	test eax, 2
		610	jz .fail ;�� ;
		611	;��. ��
188	serge	612	.alloc:
1056	Galkov	613	call alloc_page
		614	test eax, eax
		615	jz .fail
164	serge	616
1056	Galkov	617	stdcall map_page,[.err_addr],eax,dword PG_UW
164	serge	618
1056	Galkov	619	mov edi, [.err_addr]
		620	and edi, 0xFFFFF000
		621	mov ecx, 1024
		622	xor eax, eax
		623	;cld ;caller is duty for this
		624	rep stosd
		625	.exit: ;iret with repeat fault instruction
1105	Galkov	626	add esp,12 ;clear in stack: locals(.err_addr) + #PF + ret_to_caller
1056	Galkov	627	restore_ring3_context
		628	iretd
465	serge	629
1056	Galkov	630	.err_access = .fail
465	serge	631	;��
1056	Galkov	632	;jmp .fail
465	serge	633
		634	.kernel_space:
1056	Galkov	635	test eax, PG_MAP
		636	jz .fail ;��
465	serge	637
1056	Galkov	638	test eax,12 ;U/S (+below)
		639	jnz .fail ;��
		640	;��
		641	;test eax, 8
		642	;jnz .fail ;��
		643	;� �� . �� P4/Xeon
465	serge	644
		645	;��
		646
1056	Galkov	647	cmp ebx, tss._io_map_0
		648	jb .fail
465	serge	649
1056	Galkov	650	cmp ebx, tss._io_map_0+8192
		651	jae .fail
465	serge	652
		653	; io permission map
		654	; copy-on-write protection
		655
1056	Galkov	656	call alloc_page
		657	test eax, eax
		658	jz .fail
465	serge	659
1056	Galkov	660	push eax
		661	stdcall map_page,[.err_addr],eax,dword PG_SW
		662	pop eax
		663	mov edi, [.err_addr]
		664	and edi, -4096
		665	lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0
465	serge	666
1056	Galkov	667	mov ebx, esi
		668	shr ebx, 12
		669	mov edx, [current_slot]
		670	or eax, PG_SW
		671	mov [edx+APPDATA.io_map+ebx*4], eax
465	serge	672
1056	Galkov	673	add esi, [default_io_map]
		674	mov ecx, 4096/4
		675	;cld ;caller is duty for this
		676	rep movsd
		677	jmp .exit
164	serge	678	endp
		679
		680	align 4
		681	proc map_mem stdcall, lin_addr:dword,pdir:dword,\
		682	ofs:dword,buf_size:dword
		683	mov eax, [buf_size]
		684	test eax, eax
		685	jz .exit
		686
		687	mov eax, [pdir]
		688	and eax, 0xFFFFF000
		689
536	diamond	690	stdcall map_page,[ipc_pdir],eax,PG_UW
164	serge	691	mov ebx, [ofs]
		692	shr ebx, 22
		693	mov esi, [ipc_pdir]
		694	mov edi, [ipc_ptab]
		695	mov eax, [esi+ebx*4]
		696	and eax, 0xFFFFF000
		697	jz .exit
536	diamond	698	stdcall map_page,edi,eax,PG_UW
164	serge	699	; inc ebx
		700	; add edi, 0x1000
		701	; mov eax, [esi+ebx*4]
		702	; test eax, eax
		703	; jz @f
		704	; and eax, 0xFFFFF000
		705	; stdcall map_page, edi, eax
		706
		707	@@: mov edi, [lin_addr]
		708	and edi, 0xFFFFF000
		709	mov ecx, [buf_size]
		710	add ecx, 4095
		711	shr ecx, 12
		712	inc ecx
		713
		714	mov edx, [ofs]
		715	shr edx, 12
		716	and edx, 0x3FF
		717	mov esi, [ipc_ptab]
		718
		719	.map: mov eax, [esi+edx*4]
		720	and eax, 0xFFFFF000
536	diamond	721	jz .exit
		722	stdcall map_page,edi,eax,PG_UW
		723	dec ecx
		724	jz .exit
164	serge	725	add edi, 0x1000
		726	inc edx
536	diamond	727	cmp edx, 0x400
164	serge	728	jnz .map
536	diamond	729	inc ebx
		730	mov eax, [ipc_pdir]
		731	mov eax, [eax+ebx*4]
		732	and eax, 0xFFFFF000
		733	jz .exit
		734	stdcall map_page,esi,eax,PG_UW
		735	xor edx, edx
		736	jmp .map
164	serge	737
		738	.exit:
		739	ret
		740	endp
		741
		742	align 4
		743	proc map_memEx stdcall, lin_addr:dword,pdir:dword,\
		744	ofs:dword,buf_size:dword
		745	mov eax, [buf_size]
		746	test eax, eax
		747	jz .exit
		748
		749	mov eax, [pdir]
		750	and eax, 0xFFFFF000
		751
		752	stdcall map_page,[proc_mem_pdir],eax,dword PG_UW
		753	mov ebx, [ofs]
		754	shr ebx, 22
		755	mov esi, [proc_mem_pdir]
		756	mov edi, [proc_mem_tab]
		757	mov eax, [esi+ebx*4]
		758	and eax, 0xFFFFF000
		759	test eax, eax
		760	jz .exit
		761	stdcall map_page,edi,eax,dword PG_UW
		762
		763	@@: mov edi, [lin_addr]
		764	and edi, 0xFFFFF000
		765	mov ecx, [buf_size]
		766	add ecx, 4095
		767	shr ecx, 12
		768	inc ecx
		769
		770	mov edx, [ofs]
		771	shr edx, 12
		772	and edx, 0x3FF
		773	mov esi, [proc_mem_tab]
		774
		775	.map: mov eax, [esi+edx*4]
		776	; and eax, 0xFFFFF000
		777	; test eax, eax
		778	; jz .exit
		779	stdcall map_page,edi,eax,dword PG_UW
		780	add edi, 0x1000
		781	inc edx
		782	dec ecx
		783	jnz .map
		784	.exit:
		785	ret
		786	endp
		787
		788
		789
		790
		791	sys_IPC:
		792	;input:
		793	; eax=1 - set ipc buffer area
		794	; ebx=address of buffer
		795	; ecx=size of buffer
		796	; eax=2 - send message
		797	; ebx=PID
		798	; ecx=address of message
		799	; edx=size of message
		800
		801	cmp eax,1
		802	jne @f
		803	call set_ipc_buff
		804	mov [esp+36], eax
		805	ret
		806	@@:
		807	cmp eax, 2
		808	jne @f
		809	stdcall sys_ipc_send, ebx, ecx, edx
		810	mov [esp+36], eax
		811	ret
		812	@@:
		813	xor eax, eax
		814	not eax
		815	mov [esp+36], eax
		816	ret
		817
		818	align 4
		819	proc set_ipc_buff
		820
465	serge	821	mov eax,[current_slot]
164	serge	822	pushf
		823	cli
465	serge	824	mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area
		825	mov [eax+APPDATA.ipc_size],ecx
164	serge	826
		827	add ecx, ebx
		828	add ecx, 4095
		829	and ecx, not 4095
		830
		831	.touch: mov eax, [ebx]
		832	add ebx, 0x1000
		833	cmp ebx, ecx
536	diamond	834	jb .touch
164	serge	835
		836	popf
		837	xor eax, eax
		838	ret
		839	endp
		840
		841	proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword
		842	locals
		843	dst_slot dd ?
		844	dst_offset dd ?
		845	buf_size dd ?
536	diamond	846	used_buf dd ?
164	serge	847	endl
		848
		849	pushf
		850	cli
		851
		852	mov eax, [PID]
		853	call pid_to_slot
		854	test eax,eax
		855	jz .no_pid
		856
		857	mov [dst_slot], eax
		858	shl eax,8
380	serge	859	mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined?
164	serge	860	test edi,edi
		861	jz .no_ipc_area
		862
		863	mov ebx, edi
		864	and ebx, 0xFFF
		865	mov [dst_offset], ebx
		866
380	serge	867	mov esi, [eax+SLOT_BASE+0xa4]
164	serge	868	mov [buf_size], esi
		869
536	diamond	870	mov ecx, [ipc_tmp]
		871	cmp esi, 0x40000-0x1000 ; size of [ipc_tmp] minus one page
		872	jbe @f
		873	push eax esi edi
		874	add esi,0x1000
		875	stdcall alloc_kernel_space,esi
		876	mov ecx, eax
		877	pop edi esi eax
		878	@@:
		879	mov [used_buf], ecx
		880	stdcall map_mem, ecx, [SLOT_BASE+eax+0xB8],\
164	serge	881	edi, esi
		882
		883	mov edi, [dst_offset]
536	diamond	884	add edi, [used_buf]
164	serge	885	cmp dword [edi], 0
		886	jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now
227	serge	887
566	serge	888	mov edx, dword [edi+4]
		889	lea ebx, [edx+8]
164	serge	890	add ebx, [msg_size]
		891	cmp ebx, [buf_size]
		892	ja .buffer_overflow ;esi<0 - not enough memory in buffer
227	serge	893
164	serge	894	mov dword [edi+4], ebx
		895	mov eax,[TASK_BASE]
		896	mov eax, [eax+0x04] ;eax - our PID
		897	add edi, edx
		898	mov [edi], eax
		899	mov ecx, [msg_size]
		900
		901	mov [edi+4], ecx
		902	add edi, 8
		903	mov esi, [msg_addr]
465	serge	904	; add esi, new_app_base
164	serge	905	cld
		906	rep movsb
		907
		908	mov ebx, [ipc_tmp]
		909	mov edx, ebx
		910	shr ebx, 12
		911	xor eax, eax
365	serge	912	mov [page_tabs+ebx*4], eax
164	serge	913	invlpg [edx]
		914
		915	mov ebx, [ipc_pdir]
		916	mov edx, ebx
		917	shr ebx, 12
		918	xor eax, eax
365	serge	919	mov [page_tabs+ebx*4], eax
164	serge	920	invlpg [edx]
		921
		922	mov ebx, [ipc_ptab]
		923	mov edx, ebx
		924	shr ebx, 12
		925	xor eax, eax
365	serge	926	mov [page_tabs+ebx*4], eax
164	serge	927	invlpg [edx]
		928
		929	mov eax, [dst_slot]
		930	shl eax, 8
380	serge	931	or [eax+SLOT_BASE+0xA8],dword 0x40
164	serge	932	cmp dword [check_idle_semaphore],20
		933	jge .ipc_no_cis
		934
		935	mov dword [check_idle_semaphore],5
		936	.ipc_no_cis:
536	diamond	937	push 0
		938	jmp .ret
164	serge	939	.no_pid:
		940	popf
536	diamond	941	mov eax, 4
164	serge	942	ret
		943	.no_ipc_area:
		944	popf
		945	xor eax, eax
		946	inc eax
		947	ret
		948	.ipc_blocked:
536	diamond	949	push 2
		950	jmp .ret
164	serge	951	.buffer_overflow:
536	diamond	952	push 3
		953	.ret:
		954	mov eax, [used_buf]
		955	cmp eax, [ipc_tmp]
		956	jz @f
		957	stdcall free_kernel_space,eax
		958	@@:
		959	pop eax
164	serge	960	popf
		961	ret
		962	endp
		963
		964	align 4
170	serge	965	sysfn_meminfo:
164	serge	966
1072	diamond	967	; add ecx, new_app_base
		968	cmp ecx, OS_BASE
465	serge	969	jae .fail
172	serge	970
164	serge	971	mov eax, [pg_data.pages_count]
1072	diamond	972	mov [ecx], eax
172	serge	973	shl eax, 12
1072	diamond	974	mov [esp+32], eax
		975	mov eax, [pg_data.pages_free]
		976	mov [ecx+4], eax
		977	mov eax, [pg_data.pages_faults]
		978	mov [ecx+8], eax
		979	mov eax, [heap_size]
		980	mov [ecx+12], eax
		981	mov eax, [heap_free]
		982	mov [ecx+16], eax
170	serge	983	mov eax, [heap_blocks]
1072	diamond	984	mov [ecx+20], eax
		985	mov eax, [free_blocks]
		986	mov [ecx+24], eax
164	serge	987	ret
172	serge	988	.fail:
1072	diamond	989	mov dword [esp+32], -1
172	serge	990	ret
164	serge	991
		992	align 4
940	serge	993	f68call:
1275	serge	994	dd f68.11 ; init_heap
		995	dd f68.12 ; user_alloc
		996	dd f68.13 ; user_free
		997	dd f68.14 ; get_event_ex
1077	Galkov	998	dd f68.fail ;moved to f68.24
1275	serge	999	dd f68.16 ; get_service
		1000	dd f68.17 ; call_service
1077	Galkov	1001	dd f68.fail ;moved to f68.25
1275	serge	1002	dd f68.19 ; load_dll
		1003	dd f68.20 ; user_realloc
		1004	dd f68.21 ; load_driver
		1005	dd f68.22 ; shmem_open
		1006	dd f68.23 ; shmem_close
1077	Galkov	1007	dd f68.24
		1008	dd f68.25
164	serge	1009
940	serge	1010	align 4
		1011	f68:
164	serge	1012	cmp eax,4
		1013	jle sys_sheduler
		1014
170	serge	1015	cmp eax, 11
164	serge	1016	jb .fail
		1017
1077	Galkov	1018	cmp eax, 25
940	serge	1019	ja .fail
		1020
		1021	jmp dword [f68call+eax4-114]
		1022	.11:
188	serge	1023	call init_heap
164	serge	1024	mov [esp+36], eax
		1025	ret
940	serge	1026	.12:
164	serge	1027	stdcall user_alloc, ebx
		1028	mov [esp+36], eax
		1029	ret
940	serge	1030	.13:
164	serge	1031	stdcall user_free, ebx
		1032	mov [esp+36], eax
		1033	ret
940	serge	1034	.14:
465	serge	1035	cmp ebx, OS_BASE
		1036	jae .fail
1055	Galkov	1037	mov edi,ebx
		1038	call get_event_ex
227	serge	1039	mov [esp+36], eax
164	serge	1040	ret
940	serge	1041	.16:
188	serge	1042	test ebx, ebx
		1043	jz .fail
465	serge	1044	cmp ebx, OS_BASE
		1045	jae .fail
164	serge	1046	stdcall get_service, ebx
		1047	mov [esp+36], eax
		1048	ret
940	serge	1049	.17:
378	serge	1050	call srv_handlerEx ;ebx
164	serge	1051	mov [esp+36], eax
		1052	ret
940	serge	1053	.19:
465	serge	1054	cmp ebx, OS_BASE
		1055	jae .fail
198	serge	1056	stdcall load_library, ebx
		1057	mov [esp+36], eax
		1058	ret
940	serge	1059	.20:
490	serge	1060	mov eax, ecx
		1061	call user_realloc
		1062	mov [esp+36], eax
		1063	ret
940	serge	1064	.21:
740	serge	1065	cmp ebx, OS_BASE
		1066	jae .fail
		1067
		1068	stdcall load_PE, ebx
		1069
		1070	test eax, eax
		1071	jz @F
		1072
		1073	mov esi, eax
		1074	stdcall eax, DRV_ENTRY
		1075
		1076	test eax, eax
		1077	jz @F
		1078
		1079	mov [eax+SRV.entry], esi
		1080
		1081	@@:
		1082	mov [esp+36], eax
		1083	ret
940	serge	1084	.22:
		1085	cmp ebx, OS_BASE
		1086	jae .fail
740	serge	1087
940	serge	1088	stdcall shmem_open, ebx, ecx, edx
		1089	mov [esp+28], edx
		1090	mov [esp+36], eax
		1091	ret
740	serge	1092
943	serge	1093	.23:
		1094	cmp ebx, OS_BASE
		1095	jae .fail
		1096
		1097	stdcall shmem_close, ebx
		1098	mov [esp+36], eax
		1099	ret
1275	serge	1100	.24:
		1101	mov eax, [current_slot]
		1102	xchg ebx, [eax+APPDATA.exc_handler]
		1103	xchg ecx, [eax+APPDATA.except_mask]
		1104	mov [esp+36], ebx ; reg_eax+8
		1105	mov [esp+24], ecx ; reg_ebx+8
		1106	ret
		1107	.25:
		1108	cmp ebx,32
		1109	jae .fail
		1110	mov eax, [current_slot]
		1111	btr [eax+APPDATA.except_mask],ebx
		1112	setc byte[esp+36]
		1113	jecxz @f
		1114	bts [eax+APPDATA.except_mask],ebx
		1115	@@:
		1116	ret
943	serge	1117
164	serge	1118	.fail:
		1119	xor eax, eax
		1120	mov [esp+36], eax
		1121	ret
		1122
		1123	align 4
819	serge	1124	proc load_pe_driver stdcall, file:dword
		1125
		1126	stdcall load_PE, [file]
		1127	test eax, eax
		1128	jz .fail
		1129
		1130	mov esi, eax
		1131	stdcall eax, DRV_ENTRY
		1132	test eax, eax
		1133	jz .fail
		1134
		1135	mov [eax+SRV.entry], esi
		1136	ret
		1137
		1138	.fail:
		1139	xor eax, eax
		1140	ret
		1141	endp
		1142
		1143
		1144	align 4
164	serge	1145	proc init_mtrr
		1146
412	serge	1147	cmp [BOOT_VAR+0x901c],byte 2
164	serge	1148	je .exit
		1149
211	serge	1150	bt [cpu_caps], CAPS_MTRR
		1151	jnc .exit
		1152
164	serge	1153	mov eax, cr0
		1154	or eax, 0x60000000 ;disable caching
		1155	mov cr0, eax
		1156	wbinvd ;invalidate cache
		1157
		1158	mov ecx, 0x2FF
		1159	rdmsr ;
1030	diamond	1160	; has BIOS already initialized MTRRs?
		1161	test ah, 8
		1162	jnz .skip_init
		1163	; rarely needed, so mainly placeholder
		1164	; main memory - cached
164	serge	1165	push eax
		1166
821	diamond	1167	mov eax, [MEM_AMOUNT]
		1168	; round eax up to next power of 2
		1169	dec eax
		1170	bsr ecx, eax
1030	diamond	1171	mov ebx, 2
		1172	shl ebx, cl
		1173	dec ebx
		1174	; base of memory range = 0, type of memory range = MEM_WB
164	serge	1175	xor edx, edx
1030	diamond	1176	mov eax, MEM_WB
		1177	mov ecx, 0x200
		1178	wrmsr
		1179	; mask of memory range = 0xFFFFFFFFF - (size - 1), ebx = size - 1
		1180	mov eax, 0xFFFFFFFF
		1181	mov edx, 0x0000000F
		1182	sub eax, ebx
		1183	sbb edx, 0
		1184	or eax, 0x800
		1185	inc ecx
		1186	wrmsr
		1187	; clear unused MTRRs
164	serge	1188	xor eax, eax
1030	diamond	1189	xor edx, edx
164	serge	1190	@@:
1030	diamond	1191	wrmsr
164	serge	1192	inc ecx
1030	diamond	1193	cmp ecx, 0x210
		1194	jb @b
		1195	; enable MTRRs
		1196	pop eax
		1197	or ah, 8
		1198	and al, 0xF0 ; default memtype = UC
		1199	mov ecx, 0x2FF
164	serge	1200	wrmsr
1030	diamond	1201	.skip_init:
		1202	stdcall set_mtrr, [LFBAddress],[LFBSize],MEM_WC
164	serge	1203
		1204	wbinvd ;again invalidate
		1205
		1206	mov eax, cr0
		1207	and eax, not 0x60000000
		1208	mov cr0, eax ; enable caching
		1209	.exit:
		1210	ret
		1211	endp
		1212
		1213	align 4
1030	diamond	1214	proc set_mtrr stdcall, base:dword,size:dword,mem_type:dword
		1215	; find unused register
		1216	mov ecx, 0x201
		1217	@@:
		1218	rdmsr
		1219	dec ecx
		1220	test ah, 8
		1221	jz .found
		1222	rdmsr
		1223	mov al, 0 ; clear memory type field
		1224	cmp eax, [base]
		1225	jz .ret
		1226	add ecx, 3
		1227	cmp ecx, 0x210
		1228	jb @b
		1229	; no free registers, ignore the call
		1230	.ret:
		1231	ret
		1232	.found:
		1233	; found, write values
164	serge	1234	xor edx, edx
		1235	mov eax, [base]
		1236	or eax, [mem_type]
		1237	wrmsr
		1238
		1239	mov ebx, [size]
		1240	dec ebx
		1241	mov eax, 0xFFFFFFFF
		1242	mov edx, 0x0000000F
		1243	sub eax, ebx
		1244	sbb edx, 0
		1245	or eax, 0x800
		1246	inc ecx
		1247	wrmsr
		1248	ret
		1249	endp
		1250
465	serge	1251	align 4
172	serge	1252	proc stall stdcall, delay:dword
		1253	push ecx
		1254	push edx
		1255	push ebx
		1256	push eax
		1257
		1258	mov eax, [delay]
		1259	mul [stall_mcs]
		1260	mov ebx, eax ;low
		1261	mov ecx, edx ;high
		1262	rdtsc
		1263	add ebx, eax
		1264	adc ecx,edx
		1265	@@:
		1266	rdtsc
		1267	sub eax, ebx
		1268	sbb edx, ecx
		1269	jb @B
		1270
		1271	pop eax
		1272	pop ebx
		1273	pop edx
		1274	pop ecx
		1275	ret
		1276	endp
		1277
520	serge	1278	align 4
		1279	proc create_ring_buffer stdcall, size:dword, flags:dword
		1280	locals
		1281	buf_ptr dd ?
		1282	endl
237	serge	1283
520	serge	1284	mov eax, [size]
		1285	test eax, eax
		1286	jz .fail
		1287
		1288	add eax, eax
		1289	stdcall alloc_kernel_space, eax
		1290	test eax, eax
		1291	jz .fail
		1292
662	serge	1293	push ebx
		1294
520	serge	1295	mov [buf_ptr], eax
		1296
		1297	mov ebx, [size]
		1298	shr ebx, 12
		1299	push ebx
		1300
		1301	stdcall alloc_pages, ebx
		1302	pop ecx
		1303
		1304	test eax, eax
		1305	jz .mm_fail
		1306
662	serge	1307	push edi
		1308
520	serge	1309	or eax, [flags]
		1310	mov edi, [buf_ptr]
		1311	mov ebx, [buf_ptr]
		1312	mov edx, ecx
566	serge	1313	shl edx, 2
520	serge	1314	shr edi, 10
		1315	@@:
		1316	mov [page_tabs+edi], eax
		1317	mov [page_tabs+edi+edx], eax
924	serge	1318	invlpg [ebx]
		1319	invlpg [ebx+0x10000]
520	serge	1320	add eax, 0x1000
		1321	add ebx, 0x1000
566	serge	1322	add edi, 4
520	serge	1323	dec ecx
		1324	jnz @B
		1325
		1326	mov eax, [buf_ptr]
662	serge	1327	pop edi
		1328	pop ebx
520	serge	1329	ret
		1330	.mm_fail:
		1331	stdcall free_kernel_space, [buf_ptr]
		1332	xor eax, eax
662	serge	1333	pop ebx
520	serge	1334	.fail:
		1335	ret
		1336	endp

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(root)/kernel/trunk/core/memory.inc – Rev 1275