WebSVN – Kolibri OS – Blame – /kernel/branches/net/core/memory.inc

Rev	Author	Line No.	Line
1159	hidnplayr	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
		8	$Revision: 983 $
		9
		10
		11	align 4
		12	proc alloc_page
		13
		14	pushfd
		15	cli
		16	push ebx
		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
		25	pop ebx
		26	popfd
		27	xor eax,eax
		28	ret
		29	.found:
		30	btr [ebx], eax
		31	mov [page_start],ebx
		32	sub ebx, sys_pgmap
		33	lea eax, [eax+ebx*8]
		34	shl eax, 12
		35	dec [pg_data.pages_free]
		36	pop ebx
		37	popfd
		38	ret
		39	endp
		40
		41	align 4
		42	proc alloc_pages stdcall, count:dword
		43	pushfd
		44	push ebx
		45	push edi
		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
		67	.fail:
		68	xor eax, eax
		69	pop edi
		70	pop ebx
		71	popfd
		72	ret
		73	.next:
		74	inc ecx
		75	cmp ecx, ebx
		76	jb .find
		77	pop edi
		78	pop ebx
		79	popfd
		80	xor eax, eax
		81	ret
		82	.ok:
		83	sub ecx, edi
		84	inc ecx
		85	push esi
		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
		95	pop esi
		96	pop edi
		97	pop ebx
		98	popfd
		99	ret
		100	endp
		101
		102	align 4
		103	proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword
		104	push ebx
		105	mov eax, [phis_addr]
		106	and eax, not 0xFFF
		107	or eax, [flags]
		108	mov ebx, [lin_addr]
		109	shr ebx, 12
		110	mov [page_tabs+ebx*4], eax
		111	mov eax, [lin_addr]
		112	invlpg [eax]
		113	pop ebx
		114	ret
		115	endp
		116
		117	align 4
		118	map_space: ;not implemented
		119
		120
		121	ret
		122
		123
		124	align 4
		125	proc free_page
		126	;arg: eax page address
		127	pushfd
		128	cli
		129	shr eax, 12 ;page index
		130	bts dword [sys_pgmap], eax ;that's all!
		131	cmc
		132	adc [pg_data.pages_free], 0
		133	shr eax, 3
		134	and eax, not 3 ;dword offset from page_map
		135	add eax, sys_pgmap
		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
		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
		169	; push eax
		170	; invlpg [ebx]
		171	; pop eax
		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
		187	; param
		188	; eax= page base + page flags
		189	; ebx= linear address
		190	; ecx= count
		191
		192	align 4
		193	commit_pages:
		194	push edi
		195	test ecx, ecx
		196	jz .fail
		197
		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	@@:
		206	mov [page_tabs+ebx*4], eax
		207	; push eax
		208	; invlpg [edi]
		209	; pop eax
		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:
		217	pop edi
		218	ret
		219
		220
		221	; param
		222	; eax= base
		223	; ecx= count
		224
		225	align 4
		226	release_pages:
		227
		228	pushad
		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
		236	add esi, page_tabs
		237
		238	mov ebp, [pg_data.pages_free]
		239	mov ebx, [page_start]
		240	mov edx, sys_pgmap
		241	@@:
		242	xor eax, eax
		243	xchg eax, [esi]
		244	push eax
		245	invlpg [edi]
		246	pop eax
		247
		248	test eax, 1
		249	jz .next
		250
		251	shr eax, 12
		252	bts [edx], eax
		253	cmc
		254	adc ebp, 0
		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
		267	mov [pg_data.pages_free], ebp
		268	and [pg_data.pg_mutex],0
		269	popad
		270	ret
		271
		272	; param
		273	; eax= base
		274	; ecx= count
		275
		276	align 4
		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
		299	proc map_page_table stdcall, lin_addr:dword, phis_addr:dword
		300	push ebx
		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
		306	mov dword [master_tab+ebx*4], eax
		307	mov eax, [lin_addr]
		308	shr eax, 10
		309	add eax, page_tabs
		310	invlpg [eax]
		311	pop ebx
		312	ret
		313	endp
		314
		315	align 4
		316	proc init_LFB
		317	locals
		318	pg_count dd ?
		319	endl
		320
		321	cmp dword [LFBAddress], -1
		322	jne @f
		323	mov [BOOT_VAR+0x901c],byte 2
		324	stdcall kernel_alloc, 0x280000
		325	mov [LFBAddress], eax
		326	ret
		327	@@:
		328	test [SCR_MODE],word 0100000000000000b
		329	jnz @f
		330	mov [BOOT_VAR+0x901c],byte 2
		331	ret
		332	@@:
		333	call init_mtrr
		334
		335	mov edx, LFB_BASE
		336	mov esi, [LFBAddress]
		337	mov edi, 0x00800000
		338	mov dword [exp_lfb+4], edx
		339
		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
		347	mov edx, sys_pgdir+(LFB_BASE shr 20)
		348	@@:
		349	mov [edx], esi
		350	add edx, 4
		351	add esi, 0x00400000
		352	dec edi
		353	jnz @B
		354
		355	bt [cpu_caps], CAPS_PGE
		356	jnc @F
		357	or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL
		358	@@:
		359	mov dword [LFBAddress], LFB_BASE
		360	mov eax, cr3 ;flush TLB
		361	mov cr3, eax
		362	ret
		363
		364	.map_page_tables:
		365
		366	@@:
		367	call alloc_page
		368	stdcall map_page_table, edx, eax
		369	add edx, 0x00400000
		370	dec edi
		371	jnz @B
		372
		373	mov eax, [LFBAddress]
		374	mov edi, page_tabs + (LFB_BASE shr 10)
		375	or eax, PG_UW
		376	mov ecx, [pg_count]
		377	cld
		378	@@:
		379	stosd
		380	add eax, 0x1000
		381	dec ecx
		382	jnz @B
		383
		384	mov dword [LFBAddress], LFB_BASE
		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
		394	mov ebx, pg_data.pg_mutex
		395	call wait_mutex ;ebx
		396
		397	mov edi, [new_size]
		398	add edi,4095
		399	and edi,not 4095
		400	mov [new_size], edi
		401
		402	mov edx,[current_slot]
		403	cmp [edx+APPDATA.heap_base],0
		404	jne .exit
		405
		406	mov esi, [edx+APPDATA.mem_size]
		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	@@:
		416	mov eax, [app_page_tabs+edi*4]
		417	test eax, 1
		418	jz .next
		419	mov dword [app_page_tabs+edi*4], 2
		420	mov ebx, edi
		421	shl ebx, 12
		422	push eax
		423	invlpg [ebx]
		424	pop eax
		425	call free_page
		426
		427	.next: add edi, 1
		428	cmp edi, esi
		429	jb @B
		430
		431	.update_size:
		432	mov ebx, [new_size]
		433	call update_mem_size
		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
1198	clevermous	456	jz .exit_pop
1159	hidnplayr	457
		458	stdcall map_page_table, edi, eax
		459
		460	push edi
		461	shr edi, 10
		462	add edi, page_tabs
		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
		491	jb @B
		492
		493	jmp .update_size
1198	clevermous	494	.exit_pop:
		495	pop edi
		496	pop esi
1159	hidnplayr	497	.exit:
		498	xor eax, eax
		499	inc eax
		500	dec [pg_data.pg_mutex]
		501	ret
		502	endp
		503
		504	update_mem_size:
		505	; in: edx = slot base
		506	; ebx = new memory size
		507	; destroys eax,ecx,edx
		508
		509	mov [APPDATA.mem_size+edx],ebx
		510	;search threads and update
		511	;application memory size infomation
		512	mov ecx,[APPDATA.dir_table+edx]
		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
		526	cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread?
		527	jnz .search_threads_next
		528	mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size
		529	.search_threads_next:
		530	inc eax
		531	jmp .search_threads
		532	.search_threads_end:
		533	ret
		534
		535	; param
		536	; eax= linear address
		537	;
		538	; retval
		539	; eax= phisical page address
		540
		541	align 4
		542	get_pg_addr:
		543	shr eax, 12
		544	mov eax, [page_tabs+eax*4]
		545	and eax, 0xFFFFF000
		546	ret
		547
		548
		549	align 4
1198	clevermous	550	; Now it is called from core/sys32::exc_c (see stack frame there)
1159	hidnplayr	551	proc page_fault_handler
		552
1198	clevermous	553	.err_addr equ ebp-4
1159	hidnplayr	554
1198	clevermous	555	push ebx ;save exception number (#PF)
		556	mov ebp, esp
		557	mov ebx, cr2
		558	push ebx ;that is locals: .err_addr = cr2
		559	inc [pg_data.pages_faults]
1159	hidnplayr	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
		568
1198	clevermous	569	mov eax, [pf_err_code]
1159	hidnplayr	570
1198	clevermous	571	cmp ebx, OS_BASE ;ebx == .err_addr
		572	jb .user_space ;�� ;
1159	hidnplayr	573
1198	clevermous	574	cmp ebx, page_tabs
		575	jb .kernel_space ;��
1159	hidnplayr	576
1198	clevermous	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
		592	pop ebx ;restore exception number (#PF)
		593	ret
1159	hidnplayr	594
		595	.user_space:
1198	clevermous	596	test eax, PG_MAP
		597	jnz .err_access ;��
		598	;�� ?
1159	hidnplayr	599
1198	clevermous	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	;��
1159	hidnplayr	607
1198	clevermous	608	mov eax, [page_tabs+ebx*4]
		609	test eax, 2
		610	jz .fail ;�� ;
		611	;��. ��
1159	hidnplayr	612	.alloc:
1198	clevermous	613	call alloc_page
		614	test eax, eax
		615	jz .fail
1159	hidnplayr	616
1198	clevermous	617	stdcall map_page,[.err_addr],eax,dword PG_UW
1159	hidnplayr	618
1198	clevermous	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
		626	add esp,12 ;clear in stack: locals(.err_addr) + #PF + ret_to_caller
		627	restore_ring3_context
		628	iretd
1159	hidnplayr	629
1198	clevermous	630	.err_access = .fail
1159	hidnplayr	631	;��
1198	clevermous	632	;jmp .fail
1159	hidnplayr	633
		634	.kernel_space:
1198	clevermous	635	test eax, PG_MAP
		636	jz .fail ;��
1159	hidnplayr	637
1198	clevermous	638	test eax,12 ;U/S (+below)
		639	jnz .fail ;��
		640	;��
		641	;test eax, 8
		642	;jnz .fail ;��
		643	;� �� . �� P4/Xeon
1159	hidnplayr	644
		645	;��
		646
1198	clevermous	647	cmp ebx, tss._io_map_0
		648	jb .fail
1159	hidnplayr	649
1198	clevermous	650	cmp ebx, tss._io_map_0+8192
		651	jae .fail
1159	hidnplayr	652
		653	; io permission map
		654	; copy-on-write protection
		655
1198	clevermous	656	call alloc_page
		657	test eax, eax
		658	jz .fail
1159	hidnplayr	659
1198	clevermous	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
1159	hidnplayr	666
1198	clevermous	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
1159	hidnplayr	672
1198	clevermous	673	add esi, [default_io_map]
		674	mov ecx, 4096/4
		675	;cld ;caller is duty for this
		676	rep movsd
		677	jmp .exit
1159	hidnplayr	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
		690	stdcall map_page,[ipc_pdir],eax,PG_UW
		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
		698	stdcall map_page,edi,eax,PG_UW
		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
		721	jz .exit
		722	stdcall map_page,edi,eax,PG_UW
		723	dec ecx
		724	jz .exit
		725	add edi, 0x1000
		726	inc edx
		727	cmp edx, 0x400
		728	jnz .map
		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
		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
		821	mov eax,[current_slot]
		822	pushf
		823	cli
		824	mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area
		825	mov [eax+APPDATA.ipc_size],ecx
		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
		834	jb .touch
		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 ?
		846	used_buf dd ?
		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
		859	mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined?
		860	test edi,edi
		861	jz .no_ipc_area
		862
		863	mov ebx, edi
		864	and ebx, 0xFFF
		865	mov [dst_offset], ebx
		866
		867	mov esi, [eax+SLOT_BASE+0xa4]
		868	mov [buf_size], esi
		869
		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],\
		881	edi, esi
		882
		883	mov edi, [dst_offset]
		884	add edi, [used_buf]
		885	cmp dword [edi], 0
		886	jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now
		887
		888	mov edx, dword [edi+4]
		889	lea ebx, [edx+8]
		890	add ebx, [msg_size]
		891	cmp ebx, [buf_size]
		892	ja .buffer_overflow ;esi<0 - not enough memory in buffer
		893
		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]
		904	; add esi, new_app_base
		905	cld
		906	rep movsb
		907
		908	mov ebx, [ipc_tmp]
		909	mov edx, ebx
		910	shr ebx, 12
		911	xor eax, eax
		912	mov [page_tabs+ebx*4], eax
		913	invlpg [edx]
		914
		915	mov ebx, [ipc_pdir]
		916	mov edx, ebx
		917	shr ebx, 12
		918	xor eax, eax
		919	mov [page_tabs+ebx*4], eax
		920	invlpg [edx]
		921
		922	mov ebx, [ipc_ptab]
		923	mov edx, ebx
		924	shr ebx, 12
		925	xor eax, eax
		926	mov [page_tabs+ebx*4], eax
		927	invlpg [edx]
		928
		929	mov eax, [dst_slot]
		930	shl eax, 8
		931	or [eax+SLOT_BASE+0xA8],dword 0x40
		932	cmp dword [check_idle_semaphore],20
		933	jge .ipc_no_cis
		934
		935	mov dword [check_idle_semaphore],5
		936	.ipc_no_cis:
		937	push 0
		938	jmp .ret
		939	.no_pid:
		940	popf
		941	mov eax, 4
		942	ret
		943	.no_ipc_area:
		944	popf
		945	xor eax, eax
		946	inc eax
		947	ret
		948	.ipc_blocked:
		949	push 2
		950	jmp .ret
		951	.buffer_overflow:
		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
		960	popf
		961	ret
		962	endp
		963
		964	align 4
		965	sysfn_meminfo:
		966
1198	clevermous	967	; add ecx, new_app_base
		968	cmp ecx, OS_BASE
1159	hidnplayr	969	jae .fail
		970
		971	mov eax, [pg_data.pages_count]
1198	clevermous	972	mov [ecx], eax
1159	hidnplayr	973	shl eax, 12
1198	clevermous	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
1159	hidnplayr	983	mov eax, [heap_blocks]
1198	clevermous	984	mov [ecx+20], eax
		985	mov eax, [free_blocks]
		986	mov [ecx+24], eax
1159	hidnplayr	987	ret
		988	.fail:
1198	clevermous	989	mov dword [esp+32], -1
1159	hidnplayr	990	ret
		991
		992	align 4
		993	f68call:
		994	dd f68.11
		995	dd f68.12
		996	dd f68.13
		997	dd f68.14
1198	clevermous	998	dd f68.fail ;moved to f68.24
1159	hidnplayr	999	dd f68.16
		1000	dd f68.17
1198	clevermous	1001	dd f68.fail ;moved to f68.25
1159	hidnplayr	1002	dd f68.19
		1003	dd f68.20
		1004	dd f68.21
		1005	dd f68.22
		1006	dd f68.23
1198	clevermous	1007	dd f68.24
		1008	dd f68.25
1159	hidnplayr	1009
		1010	align 4
		1011	f68:
		1012	cmp eax,4
		1013	jle sys_sheduler
		1014
		1015	cmp eax, 11
		1016	jb .fail
		1017
1198	clevermous	1018	cmp eax, 25
1159	hidnplayr	1019	ja .fail
		1020
		1021	jmp dword [f68call+eax4-114]
		1022	.11:
		1023	call init_heap
		1024	mov [esp+36], eax
		1025	ret
		1026	.12:
		1027	stdcall user_alloc, ebx
		1028	mov [esp+36], eax
		1029	ret
		1030	.13:
		1031	stdcall user_free, ebx
		1032	mov [esp+36], eax
		1033	ret
		1034	.14:
		1035	cmp ebx, OS_BASE
		1036	jae .fail
1198	clevermous	1037	mov edi,ebx
		1038	call get_event_ex
1159	hidnplayr	1039	mov [esp+36], eax
		1040	ret
1198	clevermous	1041	.24:
		1042	mov eax, [current_slot]
		1043	xchg ebx, [eax+APPDATA.exc_handler]
		1044	xchg ecx, [eax+APPDATA.except_mask]
		1045	mov [esp+36], ebx ; reg_eax+8
		1046	mov [esp+24], ecx ; reg_ebx+8
1159	hidnplayr	1047	ret
		1048	.16:
		1049	test ebx, ebx
		1050	jz .fail
		1051	cmp ebx, OS_BASE
		1052	jae .fail
		1053	stdcall get_service, ebx
		1054	mov [esp+36], eax
		1055	ret
		1056	.17:
		1057	call srv_handlerEx ;ebx
		1058	mov [esp+36], eax
		1059	ret
1198	clevermous	1060	.25:
		1061	cmp ebx,32
		1062	jae .fail
		1063	mov eax, [current_slot]
		1064	btr [eax+APPDATA.except_mask],ebx
		1065	setc byte[esp+36]
		1066	jecxz @f
		1067	bts [eax+APPDATA.except_mask],ebx
		1068	@@: ret
1159	hidnplayr	1069	.19:
		1070	cmp ebx, OS_BASE
		1071	jae .fail
		1072	stdcall load_library, ebx
		1073	mov [esp+36], eax
		1074	ret
		1075	.20:
		1076	mov eax, ecx
		1077	call user_realloc
		1078	mov [esp+36], eax
		1079	ret
		1080	.21:
		1081	cmp ebx, OS_BASE
		1082	jae .fail
		1083
		1084	stdcall load_PE, ebx
		1085
		1086	test eax, eax
		1087	jz @F
		1088
		1089	mov esi, eax
		1090	stdcall eax, DRV_ENTRY
		1091
		1092	test eax, eax
		1093	jz @F
		1094
		1095	mov [eax+SRV.entry], esi
		1096
		1097	@@:
		1098	mov [esp+36], eax
		1099	ret
		1100	.22:
		1101	cmp ebx, OS_BASE
		1102	jae .fail
		1103
		1104	stdcall shmem_open, ebx, ecx, edx
		1105	mov [esp+28], edx
		1106	mov [esp+36], eax
		1107	ret
		1108
		1109	.23:
		1110	cmp ebx, OS_BASE
		1111	jae .fail
		1112
		1113	stdcall shmem_close, ebx
		1114	mov [esp+36], eax
		1115	ret
		1116
		1117	.fail:
		1118	xor eax, eax
		1119	mov [esp+36], eax
		1120	ret
		1121
		1122	align 4
		1123	proc load_pe_driver stdcall, file:dword
		1124
		1125	stdcall load_PE, [file]
		1126	test eax, eax
		1127	jz .fail
		1128
		1129	mov esi, eax
		1130	stdcall eax, DRV_ENTRY
		1131	test eax, eax
		1132	jz .fail
		1133
		1134	mov [eax+SRV.entry], esi
		1135	ret
		1136
		1137	.fail:
		1138	xor eax, eax
		1139	ret
		1140	endp
		1141
		1142
		1143	align 4
		1144	proc init_mtrr
		1145
		1146	cmp [BOOT_VAR+0x901c],byte 2
		1147	je .exit
		1148
		1149	bt [cpu_caps], CAPS_MTRR
		1150	jnc .exit
		1151
		1152	mov eax, cr0
		1153	or eax, 0x60000000 ;disable caching
		1154	mov cr0, eax
		1155	wbinvd ;invalidate cache
		1156
		1157	mov ecx, 0x2FF
		1158	rdmsr ;
		1159	push eax
		1160
		1161	xor edx, edx
		1162	xor eax, eax
		1163	mov ecx, 0x2FF
		1164	wrmsr ;disable all MTRR
		1165
		1166	mov eax, [MEM_AMOUNT]
		1167	; round eax up to next power of 2
		1168	dec eax
		1169	bsr ecx, eax
		1170	mov eax, 2
		1171	shl eax, cl
		1172	stdcall set_mtrr, edx,edx,eax,MEM_WB
		1173	stdcall set_mtrr, 1,[LFBAddress],[LFBSize],MEM_WC
		1174	xor edx, edx
		1175	xor eax, eax
		1176	mov ecx, 0x204
		1177	mov ebx, 6
		1178	@@:
		1179	wrmsr ;disable unused MTRR
		1180	inc ecx
		1181	wrmsr
		1182	inc ecx
		1183	dec ebx
		1184	jnz @b
		1185
		1186	wbinvd ;again invalidate
		1187
		1188	pop eax
		1189	or eax, 0x800 ;set default memtype to UC
		1190	and al, 0xF0
		1191	mov ecx, 0x2FF
		1192	wrmsr ;and enable MTRR
		1193
		1194	mov eax, cr0
		1195	and eax, not 0x60000000
		1196	mov cr0, eax ; enable caching
		1197	.exit:
		1198	ret
		1199	endp
		1200
		1201	align 4
		1202	proc set_mtrr stdcall, reg:dword,base:dword,size:dword,mem_type:dword
		1203
		1204	xor edx, edx
		1205	mov eax, [base]
		1206	or eax, [mem_type]
		1207	mov ecx, [reg]
		1208	lea ecx, [0x200+ecx*2]
		1209	wrmsr
		1210
		1211	mov ebx, [size]
		1212	dec ebx
		1213	mov eax, 0xFFFFFFFF
		1214	mov edx, 0x0000000F
		1215	sub eax, ebx
		1216	sbb edx, 0
		1217	or eax, 0x800
		1218	inc ecx
		1219	wrmsr
		1220	ret
		1221	endp
		1222
		1223	align 4
		1224	proc stall stdcall, delay:dword
		1225	push ecx
		1226	push edx
		1227	push ebx
		1228	push eax
		1229
		1230	mov eax, [delay]
		1231	mul [stall_mcs]
		1232	mov ebx, eax ;low
		1233	mov ecx, edx ;high
		1234	rdtsc
		1235	add ebx, eax
		1236	adc ecx,edx
		1237	@@:
		1238	rdtsc
		1239	sub eax, ebx
		1240	sbb edx, ecx
		1241	jb @B
		1242
		1243	pop eax
		1244	pop ebx
		1245	pop edx
		1246	pop ecx
		1247	ret
		1248	endp
		1249
		1250	align 4
		1251	proc create_ring_buffer stdcall, size:dword, flags:dword
		1252	locals
		1253	buf_ptr dd ?
		1254	endl
		1255
		1256	mov eax, [size]
		1257	test eax, eax
		1258	jz .fail
		1259
		1260	add eax, eax
		1261	stdcall alloc_kernel_space, eax
		1262	test eax, eax
		1263	jz .fail
		1264
		1265	push ebx
		1266
		1267	mov [buf_ptr], eax
		1268
		1269	mov ebx, [size]
		1270	shr ebx, 12
		1271	push ebx
		1272
		1273	stdcall alloc_pages, ebx
		1274	pop ecx
		1275
		1276	test eax, eax
		1277	jz .mm_fail
		1278
		1279	push edi
		1280
		1281	or eax, [flags]
		1282	mov edi, [buf_ptr]
		1283	mov ebx, [buf_ptr]
		1284	mov edx, ecx
		1285	shl edx, 2
		1286	shr edi, 10
		1287	@@:
		1288	mov [page_tabs+edi], eax
		1289	mov [page_tabs+edi+edx], eax
		1290	invlpg [ebx]
		1291	invlpg [ebx+0x10000]
		1292	add eax, 0x1000
		1293	add ebx, 0x1000
		1294	add edi, 4
		1295	dec ecx
		1296	jnz @B
		1297
		1298	mov eax, [buf_ptr]
		1299	pop edi
		1300	pop ebx
		1301	ret
		1302	.mm_fail:
		1303	stdcall free_kernel_space, [buf_ptr]
		1304	xor eax, eax
		1305	pop ebx
		1306	.fail:
		1307	ret
		1308	endp

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(root)/kernel/branches/net/core/memory.inc – Rev 1198