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: 1074 $
		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
		170	; invlpg [ebx]
		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
		208	; invlpg [edi]
		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
		456	jz .exit
		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
		494	.exit:
		495	xor eax, eax
		496	inc eax
		497	dec [pg_data.pg_mutex]
		498	ret
		499	endp
		500
294	diamond	501	update_mem_size:
465	serge	502	; in: edx = slot base
294	diamond	503	; ebx = new memory size
		504	; destroys eax,ecx,edx
		505
465	serge	506	mov [APPDATA.mem_size+edx],ebx
294	diamond	507	;search threads and update
		508	;application memory size infomation
465	serge	509	mov ecx,[APPDATA.dir_table+edx]
294	diamond	510	mov eax,2
		511
		512	.search_threads:
		513	;eax = current slot
		514	;ebx = new memory size
		515	;ecx = page directory
		516	cmp eax,[TASK_COUNT]
		517	jg .search_threads_end
		518	mov edx,eax
		519	shl edx,5
		520	cmp word [CURRENT_TASK+edx+TASKDATA.state],9 ;if slot empty?
		521	jz .search_threads_next
		522	shl edx,3
380	serge	523	cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread?
294	diamond	524	jnz .search_threads_next
380	serge	525	mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size
294	diamond	526	.search_threads_next:
		527	inc eax
		528	jmp .search_threads
		529	.search_threads_end:
		530	ret
		531
285	serge	532	; param
		533	; eax= linear address
		534	;
		535	; retval
		536	; eax= phisical page address
		537
164	serge	538	align 4
285	serge	539	get_pg_addr:
		540	shr eax, 12
365	serge	541	mov eax, [page_tabs+eax*4]
164	serge	542	and eax, 0xFFFFF000
		543	ret
		544
465	serge	545
188	serge	546	align 4
1056	Galkov	547	; Now it is called from sys32::exc_c (see stack frame there)
164	serge	548	proc page_fault_handler
465	serge	549
1056	Galkov	550	.err_addr equ ebp-4
709	diamond	551
1056	Galkov	552	mov ebp, esp
		553	mov ebx, cr2
		554	push ebx ; that is locals: .err_addr = cr2
		555	inc [pg_data.pages_faults]
465	serge	556
		557	; push eax
		558	; push edx
		559	; mov edx, 0x400 ;bochs
		560	; mov al,0xff ;bochs
		561	; out dx, al ;bochs
		562	; pop edx
		563	; pop eax
164	serge	564
1056	Galkov	565	mov eax, [pf_err_code]
164	serge	566
1056	Galkov	567	cmp ebx, OS_BASE ;ebx == .err_addr
		568	jb .user_space ;�� ;
188	serge	569
1056	Galkov	570	cmp ebx, page_tabs
		571	jb .kernel_space ;��
164	serge	572
1056	Galkov	573	cmp ebx, kernel_tabs
		574	jb .alloc;.app_tabs ;�� ;
		575	;��
		576	if 0 ;��
		577	cmp ebx, LFB_BASE
		578	jb .core_tabs ;��
		579	;��
		580	.lfb:
		581	;�� LFB
		582	;��
		583	jmp .fail
		584	end if
		585	.core_tabs:
		586	.fail: ;simply return to caller
		587	mov esp, ebp
		588	mov bl, 14 ;#PF
		589	ret
378	serge	590
164	serge	591	.user_space:
1056	Galkov	592	test eax, PG_MAP
		593	jnz .err_access ;��
		594	;�� ?
465	serge	595
1056	Galkov	596	shr ebx, 12
		597	mov ecx, ebx
		598	shr ecx, 10
		599	mov edx, [master_tab+ecx*4]
		600	test edx, PG_MAP
		601	jz .fail ;��
		602	;��
172	serge	603
1056	Galkov	604	mov eax, [page_tabs+ebx*4]
		605	test eax, 2
		606	jz .fail ;�� ;
		607	;��. ��
188	serge	608	.alloc:
1056	Galkov	609	call alloc_page
		610	test eax, eax
		611	jz .fail
164	serge	612
1056	Galkov	613	stdcall map_page,[.err_addr],eax,dword PG_UW
164	serge	614
1056	Galkov	615	mov edi, [.err_addr]
		616	and edi, 0xFFFFF000
		617	mov ecx, 1024
		618	xor eax, eax
		619	;cld ;caller is duty for this
		620	rep stosd
		621	.exit: ;iret with repeat fault instruction
		622	add esp,8 ; clear in stack: locals(.err_addr) + ret_to_caller
		623	restore_ring3_context
		624	iretd
465	serge	625
1056	Galkov	626	.err_access = .fail
465	serge	627	;��
1056	Galkov	628	;jmp .fail
465	serge	629
		630	.kernel_space:
1056	Galkov	631	test eax, PG_MAP
		632	jz .fail ;��
465	serge	633
1056	Galkov	634	test eax,12 ;U/S (+below)
		635	jnz .fail ;��
		636	;��
		637	;test eax, 8
		638	;jnz .fail ;��
		639	;� �� . �� P4/Xeon
465	serge	640
		641	;��
		642
1056	Galkov	643	cmp ebx, tss._io_map_0
		644	jb .fail
465	serge	645
1056	Galkov	646	cmp ebx, tss._io_map_0+8192
		647	jae .fail
465	serge	648
		649	; io permission map
		650	; copy-on-write protection
		651
1056	Galkov	652	call alloc_page
		653	test eax, eax
		654	jz .fail
465	serge	655
1056	Galkov	656	push eax
		657	stdcall map_page,[.err_addr],eax,dword PG_SW
		658	pop eax
		659	mov edi, [.err_addr]
		660	and edi, -4096
		661	lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0
465	serge	662
1056	Galkov	663	mov ebx, esi
		664	shr ebx, 12
		665	mov edx, [current_slot]
		666	or eax, PG_SW
		667	mov [edx+APPDATA.io_map+ebx*4], eax
465	serge	668
1056	Galkov	669	add esi, [default_io_map]
		670	mov ecx, 4096/4
		671	;cld ;caller is duty for this
		672	rep movsd
		673	jmp .exit
164	serge	674	endp
		675
		676	align 4
		677	proc map_mem stdcall, lin_addr:dword,pdir:dword,\
		678	ofs:dword,buf_size:dword
		679	mov eax, [buf_size]
		680	test eax, eax
		681	jz .exit
		682
		683	mov eax, [pdir]
		684	and eax, 0xFFFFF000
		685
536	diamond	686	stdcall map_page,[ipc_pdir],eax,PG_UW
164	serge	687	mov ebx, [ofs]
		688	shr ebx, 22
		689	mov esi, [ipc_pdir]
		690	mov edi, [ipc_ptab]
		691	mov eax, [esi+ebx*4]
		692	and eax, 0xFFFFF000
		693	jz .exit
536	diamond	694	stdcall map_page,edi,eax,PG_UW
164	serge	695	; inc ebx
		696	; add edi, 0x1000
		697	; mov eax, [esi+ebx*4]
		698	; test eax, eax
		699	; jz @f
		700	; and eax, 0xFFFFF000
		701	; stdcall map_page, edi, eax
		702
		703	@@: mov edi, [lin_addr]
		704	and edi, 0xFFFFF000
		705	mov ecx, [buf_size]
		706	add ecx, 4095
		707	shr ecx, 12
		708	inc ecx
		709
		710	mov edx, [ofs]
		711	shr edx, 12
		712	and edx, 0x3FF
		713	mov esi, [ipc_ptab]
		714
		715	.map: mov eax, [esi+edx*4]
		716	and eax, 0xFFFFF000
536	diamond	717	jz .exit
		718	stdcall map_page,edi,eax,PG_UW
		719	dec ecx
		720	jz .exit
164	serge	721	add edi, 0x1000
		722	inc edx
536	diamond	723	cmp edx, 0x400
164	serge	724	jnz .map
536	diamond	725	inc ebx
		726	mov eax, [ipc_pdir]
		727	mov eax, [eax+ebx*4]
		728	and eax, 0xFFFFF000
		729	jz .exit
		730	stdcall map_page,esi,eax,PG_UW
		731	xor edx, edx
		732	jmp .map
164	serge	733
		734	.exit:
		735	ret
		736	endp
		737
		738	align 4
		739	proc map_memEx stdcall, lin_addr:dword,pdir:dword,\
		740	ofs:dword,buf_size:dword
		741	mov eax, [buf_size]
		742	test eax, eax
		743	jz .exit
		744
		745	mov eax, [pdir]
		746	and eax, 0xFFFFF000
		747
		748	stdcall map_page,[proc_mem_pdir],eax,dword PG_UW
		749	mov ebx, [ofs]
		750	shr ebx, 22
		751	mov esi, [proc_mem_pdir]
		752	mov edi, [proc_mem_tab]
		753	mov eax, [esi+ebx*4]
		754	and eax, 0xFFFFF000
		755	test eax, eax
		756	jz .exit
		757	stdcall map_page,edi,eax,dword PG_UW
		758
		759	@@: mov edi, [lin_addr]
		760	and edi, 0xFFFFF000
		761	mov ecx, [buf_size]
		762	add ecx, 4095
		763	shr ecx, 12
		764	inc ecx
		765
		766	mov edx, [ofs]
		767	shr edx, 12
		768	and edx, 0x3FF
		769	mov esi, [proc_mem_tab]
		770
		771	.map: mov eax, [esi+edx*4]
		772	; and eax, 0xFFFFF000
		773	; test eax, eax
		774	; jz .exit
		775	stdcall map_page,edi,eax,dword PG_UW
		776	add edi, 0x1000
		777	inc edx
		778	dec ecx
		779	jnz .map
		780	.exit:
		781	ret
		782	endp
		783
		784
		785
		786
		787	sys_IPC:
		788	;input:
		789	; eax=1 - set ipc buffer area
		790	; ebx=address of buffer
		791	; ecx=size of buffer
		792	; eax=2 - send message
		793	; ebx=PID
		794	; ecx=address of message
		795	; edx=size of message
		796
		797	cmp eax,1
		798	jne @f
		799	call set_ipc_buff
		800	mov [esp+36], eax
		801	ret
		802	@@:
		803	cmp eax, 2
		804	jne @f
		805	stdcall sys_ipc_send, ebx, ecx, edx
		806	mov [esp+36], eax
		807	ret
		808	@@:
		809	xor eax, eax
		810	not eax
		811	mov [esp+36], eax
		812	ret
		813
		814	align 4
		815	proc set_ipc_buff
		816
465	serge	817	mov eax,[current_slot]
164	serge	818	pushf
		819	cli
465	serge	820	mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area
		821	mov [eax+APPDATA.ipc_size],ecx
164	serge	822
		823	add ecx, ebx
		824	add ecx, 4095
		825	and ecx, not 4095
		826
		827	.touch: mov eax, [ebx]
		828	add ebx, 0x1000
		829	cmp ebx, ecx
536	diamond	830	jb .touch
164	serge	831
		832	popf
		833	xor eax, eax
		834	ret
		835	endp
		836
		837	proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword
		838	locals
		839	dst_slot dd ?
		840	dst_offset dd ?
		841	buf_size dd ?
536	diamond	842	used_buf dd ?
164	serge	843	endl
		844
		845	pushf
		846	cli
		847
		848	mov eax, [PID]
		849	call pid_to_slot
		850	test eax,eax
		851	jz .no_pid
		852
		853	mov [dst_slot], eax
		854	shl eax,8
380	serge	855	mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined?
164	serge	856	test edi,edi
		857	jz .no_ipc_area
		858
		859	mov ebx, edi
		860	and ebx, 0xFFF
		861	mov [dst_offset], ebx
		862
380	serge	863	mov esi, [eax+SLOT_BASE+0xa4]
164	serge	864	mov [buf_size], esi
		865
536	diamond	866	mov ecx, [ipc_tmp]
		867	cmp esi, 0x40000-0x1000 ; size of [ipc_tmp] minus one page
		868	jbe @f
		869	push eax esi edi
		870	add esi,0x1000
		871	stdcall alloc_kernel_space,esi
		872	mov ecx, eax
		873	pop edi esi eax
		874	@@:
		875	mov [used_buf], ecx
		876	stdcall map_mem, ecx, [SLOT_BASE+eax+0xB8],\
164	serge	877	edi, esi
		878
		879	mov edi, [dst_offset]
536	diamond	880	add edi, [used_buf]
164	serge	881	cmp dword [edi], 0
		882	jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now
227	serge	883
566	serge	884	mov edx, dword [edi+4]
		885	lea ebx, [edx+8]
164	serge	886	add ebx, [msg_size]
		887	cmp ebx, [buf_size]
		888	ja .buffer_overflow ;esi<0 - not enough memory in buffer
227	serge	889
164	serge	890	mov dword [edi+4], ebx
		891	mov eax,[TASK_BASE]
		892	mov eax, [eax+0x04] ;eax - our PID
		893	add edi, edx
		894	mov [edi], eax
		895	mov ecx, [msg_size]
		896
		897	mov [edi+4], ecx
		898	add edi, 8
		899	mov esi, [msg_addr]
465	serge	900	; add esi, new_app_base
164	serge	901	cld
		902	rep movsb
		903
		904	mov ebx, [ipc_tmp]
		905	mov edx, ebx
		906	shr ebx, 12
		907	xor eax, eax
365	serge	908	mov [page_tabs+ebx*4], eax
164	serge	909	invlpg [edx]
		910
		911	mov ebx, [ipc_pdir]
		912	mov edx, ebx
		913	shr ebx, 12
		914	xor eax, eax
365	serge	915	mov [page_tabs+ebx*4], eax
164	serge	916	invlpg [edx]
		917
		918	mov ebx, [ipc_ptab]
		919	mov edx, ebx
		920	shr ebx, 12
		921	xor eax, eax
365	serge	922	mov [page_tabs+ebx*4], eax
164	serge	923	invlpg [edx]
		924
		925	mov eax, [dst_slot]
		926	shl eax, 8
380	serge	927	or [eax+SLOT_BASE+0xA8],dword 0x40
164	serge	928	cmp dword [check_idle_semaphore],20
		929	jge .ipc_no_cis
		930
		931	mov dword [check_idle_semaphore],5
		932	.ipc_no_cis:
536	diamond	933	push 0
		934	jmp .ret
164	serge	935	.no_pid:
		936	popf
536	diamond	937	mov eax, 4
164	serge	938	ret
		939	.no_ipc_area:
		940	popf
		941	xor eax, eax
		942	inc eax
		943	ret
		944	.ipc_blocked:
536	diamond	945	push 2
		946	jmp .ret
164	serge	947	.buffer_overflow:
536	diamond	948	push 3
		949	.ret:
		950	mov eax, [used_buf]
		951	cmp eax, [ipc_tmp]
		952	jz @f
		953	stdcall free_kernel_space,eax
		954	@@:
		955	pop eax
164	serge	956	popf
		957	ret
		958	endp
		959
		960	align 4
170	serge	961	sysfn_meminfo:
164	serge	962
1072	diamond	963	; add ecx, new_app_base
		964	cmp ecx, OS_BASE
465	serge	965	jae .fail
172	serge	966
164	serge	967	mov eax, [pg_data.pages_count]
1072	diamond	968	mov [ecx], eax
172	serge	969	shl eax, 12
1072	diamond	970	mov [esp+32], eax
		971	mov eax, [pg_data.pages_free]
		972	mov [ecx+4], eax
		973	mov eax, [pg_data.pages_faults]
		974	mov [ecx+8], eax
		975	mov eax, [heap_size]
		976	mov [ecx+12], eax
		977	mov eax, [heap_free]
		978	mov [ecx+16], eax
170	serge	979	mov eax, [heap_blocks]
1072	diamond	980	mov [ecx+20], eax
		981	mov eax, [free_blocks]
		982	mov [ecx+24], eax
164	serge	983	ret
172	serge	984	.fail:
1072	diamond	985	mov dword [esp+32], -1
172	serge	986	ret
164	serge	987
		988	align 4
940	serge	989	f68call:
		990	dd f68.11
		991	dd f68.12
		992	dd f68.13
		993	dd f68.14
		994	dd f68.15
		995	dd f68.16
		996	dd f68.17
		997	dd f68.18
		998	dd f68.19
		999	dd f68.20
		1000	dd f68.21
		1001	dd f68.22
943	serge	1002	dd f68.23
164	serge	1003
940	serge	1004	align 4
		1005	f68:
164	serge	1006	cmp eax,4
		1007	jle sys_sheduler
		1008
170	serge	1009	cmp eax, 11
164	serge	1010	jb .fail
		1011
943	serge	1012	cmp eax, 23
940	serge	1013	ja .fail
		1014
		1015	jmp dword [f68call+eax4-114]
		1016	.11:
188	serge	1017	call init_heap
164	serge	1018	mov [esp+36], eax
		1019	ret
940	serge	1020	.12:
164	serge	1021	stdcall user_alloc, ebx
		1022	mov [esp+36], eax
		1023	ret
940	serge	1024	.13:
164	serge	1025	stdcall user_free, ebx
		1026	mov [esp+36], eax
		1027	ret
940	serge	1028	.14:
465	serge	1029	cmp ebx, OS_BASE
		1030	jae .fail
1055	Galkov	1031	mov edi,ebx
		1032	call get_event_ex
227	serge	1033	mov [esp+36], eax
164	serge	1034	ret
940	serge	1035	.15:
1074	Galkov	1036	mov eax, [current_slot]
		1037	xchg ebx, [eax+APPDATA.exc_handler]
		1038	xchg ecx, [eax+APPDATA.except_mask]
		1039	mov [esp+36], ebx ; reg_eax+8
		1040	mov [esp+24], ecx ; reg_ebx+8
164	serge	1041	ret
940	serge	1042	.16:
188	serge	1043	test ebx, ebx
		1044	jz .fail
465	serge	1045	cmp ebx, OS_BASE
		1046	jae .fail
164	serge	1047	stdcall get_service, ebx
		1048	mov [esp+36], eax
		1049	ret
940	serge	1050	.17:
378	serge	1051	call srv_handlerEx ;ebx
164	serge	1052	mov [esp+36], eax
		1053	ret
940	serge	1054	.18:
1074	Galkov	1055	mov eax, [current_slot]
		1056	btr [eax+APPDATA.except_mask],ebx
		1057	setc byte[esp+36]
		1058	jecxz @f
		1059	bts [eax+APPDATA.except_mask],ebx
		1060	@@: ret
940	serge	1061	.19:
465	serge	1062	cmp ebx, OS_BASE
		1063	jae .fail
198	serge	1064	stdcall load_library, ebx
		1065	mov [esp+36], eax
		1066	ret
940	serge	1067	.20:
490	serge	1068	mov eax, ecx
		1069	call user_realloc
		1070	mov [esp+36], eax
		1071	ret
940	serge	1072	.21:
740	serge	1073	cmp ebx, OS_BASE
		1074	jae .fail
		1075
		1076	stdcall load_PE, ebx
		1077
		1078	test eax, eax
		1079	jz @F
		1080
		1081	mov esi, eax
		1082	stdcall eax, DRV_ENTRY
		1083
		1084	test eax, eax
		1085	jz @F
		1086
		1087	mov [eax+SRV.entry], esi
		1088
		1089	@@:
		1090	mov [esp+36], eax
		1091	ret
940	serge	1092	.22:
		1093	cmp ebx, OS_BASE
		1094	jae .fail
740	serge	1095
940	serge	1096	stdcall shmem_open, ebx, ecx, edx
		1097	mov [esp+28], edx
		1098	mov [esp+36], eax
		1099	ret
740	serge	1100
943	serge	1101	.23:
		1102	cmp ebx, OS_BASE
		1103	jae .fail
		1104
		1105	stdcall shmem_close, ebx
		1106	mov [esp+36], eax
		1107	ret
		1108
164	serge	1109	.fail:
		1110	xor eax, eax
		1111	mov [esp+36], eax
		1112	ret
		1113
		1114	align 4
819	serge	1115	proc load_pe_driver stdcall, file:dword
		1116
		1117	stdcall load_PE, [file]
		1118	test eax, eax
		1119	jz .fail
		1120
		1121	mov esi, eax
		1122	stdcall eax, DRV_ENTRY
		1123	test eax, eax
		1124	jz .fail
		1125
		1126	mov [eax+SRV.entry], esi
		1127	ret
		1128
		1129	.fail:
		1130	xor eax, eax
		1131	ret
		1132	endp
		1133
		1134
		1135	align 4
164	serge	1136	proc init_mtrr
		1137
412	serge	1138	cmp [BOOT_VAR+0x901c],byte 2
164	serge	1139	je .exit
		1140
211	serge	1141	bt [cpu_caps], CAPS_MTRR
		1142	jnc .exit
		1143
164	serge	1144	mov eax, cr0
		1145	or eax, 0x60000000 ;disable caching
		1146	mov cr0, eax
		1147	wbinvd ;invalidate cache
		1148
		1149	mov ecx, 0x2FF
		1150	rdmsr ;
1030	diamond	1151	; has BIOS already initialized MTRRs?
		1152	test ah, 8
		1153	jnz .skip_init
		1154	; rarely needed, so mainly placeholder
		1155	; main memory - cached
164	serge	1156	push eax
		1157
821	diamond	1158	mov eax, [MEM_AMOUNT]
		1159	; round eax up to next power of 2
		1160	dec eax
		1161	bsr ecx, eax
1030	diamond	1162	mov ebx, 2
		1163	shl ebx, cl
		1164	dec ebx
		1165	; base of memory range = 0, type of memory range = MEM_WB
164	serge	1166	xor edx, edx
1030	diamond	1167	mov eax, MEM_WB
		1168	mov ecx, 0x200
		1169	wrmsr
		1170	; mask of memory range = 0xFFFFFFFFF - (size - 1), ebx = size - 1
		1171	mov eax, 0xFFFFFFFF
		1172	mov edx, 0x0000000F
		1173	sub eax, ebx
		1174	sbb edx, 0
		1175	or eax, 0x800
		1176	inc ecx
		1177	wrmsr
		1178	; clear unused MTRRs
164	serge	1179	xor eax, eax
1030	diamond	1180	xor edx, edx
164	serge	1181	@@:
1030	diamond	1182	wrmsr
164	serge	1183	inc ecx
1030	diamond	1184	cmp ecx, 0x210
		1185	jb @b
		1186	; enable MTRRs
		1187	pop eax
		1188	or ah, 8
		1189	and al, 0xF0 ; default memtype = UC
		1190	mov ecx, 0x2FF
164	serge	1191	wrmsr
1030	diamond	1192	.skip_init:
		1193	stdcall set_mtrr, [LFBAddress],[LFBSize],MEM_WC
164	serge	1194
		1195	wbinvd ;again invalidate
		1196
		1197	mov eax, cr0
		1198	and eax, not 0x60000000
		1199	mov cr0, eax ; enable caching
		1200	.exit:
		1201	ret
		1202	endp
		1203
		1204	align 4
1030	diamond	1205	proc set_mtrr stdcall, base:dword,size:dword,mem_type:dword
		1206	; find unused register
		1207	mov ecx, 0x201
		1208	@@:
		1209	rdmsr
		1210	dec ecx
		1211	test ah, 8
		1212	jz .found
		1213	rdmsr
		1214	mov al, 0 ; clear memory type field
		1215	cmp eax, [base]
		1216	jz .ret
		1217	add ecx, 3
		1218	cmp ecx, 0x210
		1219	jb @b
		1220	; no free registers, ignore the call
		1221	.ret:
		1222	ret
		1223	.found:
		1224	; found, write values
164	serge	1225	xor edx, edx
		1226	mov eax, [base]
		1227	or eax, [mem_type]
		1228	wrmsr
		1229
		1230	mov ebx, [size]
		1231	dec ebx
		1232	mov eax, 0xFFFFFFFF
		1233	mov edx, 0x0000000F
		1234	sub eax, ebx
		1235	sbb edx, 0
		1236	or eax, 0x800
		1237	inc ecx
		1238	wrmsr
		1239	ret
		1240	endp
		1241
465	serge	1242	align 4
172	serge	1243	proc stall stdcall, delay:dword
		1244	push ecx
		1245	push edx
		1246	push ebx
		1247	push eax
		1248
		1249	mov eax, [delay]
		1250	mul [stall_mcs]
		1251	mov ebx, eax ;low
		1252	mov ecx, edx ;high
		1253	rdtsc
		1254	add ebx, eax
		1255	adc ecx,edx
		1256	@@:
		1257	rdtsc
		1258	sub eax, ebx
		1259	sbb edx, ecx
		1260	jb @B
		1261
		1262	pop eax
		1263	pop ebx
		1264	pop edx
		1265	pop ecx
		1266	ret
		1267	endp
		1268
520	serge	1269	align 4
		1270	proc create_ring_buffer stdcall, size:dword, flags:dword
		1271	locals
		1272	buf_ptr dd ?
		1273	endl
237	serge	1274
520	serge	1275	mov eax, [size]
		1276	test eax, eax
		1277	jz .fail
		1278
		1279	add eax, eax
		1280	stdcall alloc_kernel_space, eax
		1281	test eax, eax
		1282	jz .fail
		1283
662	serge	1284	push ebx
		1285
520	serge	1286	mov [buf_ptr], eax
		1287
		1288	mov ebx, [size]
		1289	shr ebx, 12
		1290	push ebx
		1291
		1292	stdcall alloc_pages, ebx
		1293	pop ecx
		1294
		1295	test eax, eax
		1296	jz .mm_fail
		1297
662	serge	1298	push edi
		1299
520	serge	1300	or eax, [flags]
		1301	mov edi, [buf_ptr]
		1302	mov ebx, [buf_ptr]
		1303	mov edx, ecx
566	serge	1304	shl edx, 2
520	serge	1305	shr edi, 10
		1306	@@:
		1307	mov [page_tabs+edi], eax
		1308	mov [page_tabs+edi+edx], eax
924	serge	1309	invlpg [ebx]
		1310	invlpg [ebx+0x10000]
520	serge	1311	add eax, 0x1000
		1312	add ebx, 0x1000
566	serge	1313	add edi, 4
520	serge	1314	dec ecx
		1315	jnz @B
		1316
		1317	mov eax, [buf_ptr]
662	serge	1318	pop edi
		1319	pop ebx
520	serge	1320	ret
		1321	.mm_fail:
		1322	stdcall free_kernel_space, [buf_ptr]
		1323	xor eax, eax
662	serge	1324	pop ebx
520	serge	1325	.fail:
		1326	ret
		1327	endp

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(root)/kernel/trunk/core/memory.inc – Rev 1074