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

Rev	Author	Line No.	Line
164	serge	1
		2	proc alloc_page
		3
		4
		5	cli
		6	mov ebx, [page_start]
		7	mov ecx, [page_end]
		8	.l1:
		9	bsf eax,[ebx];
		10	jnz .found
		11	add ebx,4
		12	cmp ebx, ecx
		13	jb .l1
		14	popfd
		15	xor eax,eax
		16	ret
		17	.found:
		18	btr [ebx], eax
		19	mov [page_start],ebx
		20	sub ebx, sys_pgmap
		21	lea eax, [eax+ebx*8]
254	serge	22	shl eax, 12
164	serge	23	dec [pg_data.pages_free]
		24	popfd
		25	ret
		26	endp
		27
		28
		29	proc alloc_pages stdcall, count:dword
		30	pushfd
		31	cli
		32	mov eax, [count]
		33	add eax, 7
		34	shr eax, 3
		35	mov [count], eax
		36	cmp eax, [pg_data.pages_free]
		37	ja .fail
		38
		39
		40	mov ebx, [page_end]
		41	.find:
		42	mov edx, [count]
		43	mov edi, ecx
		44	.match:
		45	cmp byte [ecx], 0xFF
		46	jne .next
		47	dec edx
		48	jz .ok
		49	inc ecx
		50	cmp ecx,ebx
		51	jb .match
		52	.fail: xor eax, eax
		53	popfd
		54	ret
		55	.next:
		56	inc ecx
		57	cmp ecx, ebx
		58	jb .find
		59	popfd
		60	xor eax, eax
		61	ret
		62	.ok:
		63	sub ecx, edi
		64	inc ecx
		65	mov esi, edi
		66	xor eax, eax
		67	rep stosb
		68	sub esi, sys_pgmap
		69	shl esi, 3+12
		70	mov eax, esi
		71	mov ebx, [count]
		72	shl ebx, 3
		73	sub [pg_data.pages_free], ebx
		74	popfd
		75	ret
		76	endp
		77
		78
		79	proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword
		80	push ebx
321	diamond	81	mov eax, [phis_addr]
164	serge	82	and eax, not 0xFFF
		83	or eax, [flags]
		84	mov ebx, [lin_addr]
		85	shr ebx, 12
		86	mov [page_tabs+ebx*4], eax
365	serge	87	mov eax, [lin_addr]
164	serge	88	invlpg [eax]
		89	pop ebx
321	diamond	90	ret
164	serge	91	endp
		92
		93
		94	map_space: ;not implemented
281	serge	95
		96
		97
		98
		99
		100
		101	proc free_page
164	serge	102	;arg: eax page address
		103	pushfd
		104	cli
		105	shr eax, 12 ;page index
		106	mov ebx, sys_pgmap
		107	bts [ebx], eax ;that's all!
		108	cmc
291	serge	109	adc [pg_data.pages_free], 0
328	serge	110	shr eax, 3
164	serge	111	and eax, not 3 ;dword offset from page_map
		112	add eax, ebx
		113	cmp [page_start], eax
		114	ja @f
		115	popfd
		116	ret
		117	@@:
		118	mov [page_start], eax
		119	popfd
		120	ret
		121	endp
		122
		123
279	serge	124	; eax= page base + page flags
328	serge	125	; ebx= liear address
281	serge	126	; ecx= count
		127
		128
		129	commit_pages:
328	serge	130
281	serge	131
328	serge	132	jz .fail
		133
281	serge	134
328	serge	135	mov ebx, pg_data.pg_mutex
		136	call wait_mutex ;ebx
		137
		138
		139	mov ebx, edi
		140	shr ebx, 12
		141	@@:
		142	mov [page_tabs+ebx*4], eax
365	serge	143	invlpg [edi]
328	serge	144	add edi, edx
		145	add eax, edx
		146	inc ebx
		147	dec ecx
		148	jnz @B
		149	mov [pg_data.pg_mutex],ecx
		150	.fail:
		151	ret
281	serge	152
		153
328	serge	154
281	serge	155	; eax= base
279	serge	156	; ecx= count
281	serge	157
279	serge	158
164	serge	159	release_pages:
279	serge	160
321	diamond	161
		162	mov ebx, pg_data.pg_mutex
279	serge	163	call wait_mutex ;ebx
		164
		165
		166	mov edi, eax
		167
		168
		169	add esi, page_tabs
365	serge	170
328	serge	171
		172	mov ebx, [page_start]
279	serge	173	mov edx, sys_pgmap
		174	@@:
		175	xor eax, eax
		176	xchg eax, [esi]
		177	invlpg [edi]
		178
		179
		180	jz .next
		181
		182
		183	bts [edx], eax
		184	cmc
291	serge	185	adc ebp, 0
328	serge	186	shr eax, 3
279	serge	187	and eax, -4
		188	add eax, edx
		189	cmp eax, ebx
		190	jae .next
		191
		192
		193	.next:
		194	add edi, 0x1000
		195	add esi, 4
		196	dec ecx
		197	jnz @B
		198	mov [pg_data.pages_free], ebp
328	serge	199	and [pg_data.pg_mutex],0
279	serge	200	popad
321	diamond	201	ret
279	serge	202
		203
		204	proc map_page_table stdcall, lin_addr:dword, phis_addr:dword
188	serge	205	push ebx
321	diamond	206	mov ebx, [lin_addr]
164	serge	207	shr ebx, 22
		208	mov eax, [phis_addr]
		209	and eax, not 0xFFF
		210	or eax, PG_UW ;+PG_NOCACHE
		211	mov dword [master_tab+ebx*4], eax
378	serge	212	mov eax, [lin_addr]
164	serge	213	shr eax, 10
		214	add eax, page_tabs
365	serge	215	invlpg [eax]
164	serge	216	pop ebx
321	diamond	217	ret
164	serge	218	endp
		219
		220
		221	proc init_LFB
		222	locals
378	serge	223	pg_count dd ?
		224	endl
		225
		226
164	serge	227	jne @f
		228	mov [BOOT_VAR+0x901c],byte 2
388	serge	229	stdcall kernel_alloc, 0x280000
164	serge	230	mov [LFBAddress], eax
		231	ret
		232	@@:
		233	test [SCR_MODE],word 0100000000000000b
		234	jnz @f
211	serge	235	mov [BOOT_VAR+0x901c],byte 2
388	serge	236	ret
211	serge	237	@@:
		238	mov edx, LFB_BASE
378	serge	239	mov esi, [LFBAddress]
		240	mov edi, 0x00800000
388	serge	241	mov dword [exp_lfb+4], edx
379	serge	242
214	serge	243
164	serge	244	mov [pg_count], edi
		245	shr edi, 10
		246
		247
		248	jnc .map_page_tables
		249	or esi, PG_LARGE+PG_UW
		250	mov edx, sys_pgdir+(LFB_BASE shr 20)
400	serge	251	@@:
164	serge	252	mov [edx], esi
400	serge	253	add edx, 4
378	serge	254	add esi, 0x00400000
164	serge	255	dec edi
		256	jnz @B
		257
		258
207	serge	259	jnc @F
		260	or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL
400	serge	261	@@:
207	serge	262	mov dword [LFBAddress], LFB_BASE
378	serge	263	mov eax, cr3 ;flush TLB
164	serge	264	mov cr3, eax
		265	ret
		266
		267
		268
		269
		270	call alloc_page
		271	stdcall map_page_table, edx, eax
378	serge	272	add edx, 0x00400000
388	serge	273	dec edi
164	serge	274	jnz @B
		275
		276
		277	mov edi, page_tabs + (LFB_BASE shr 10)
378	serge	278	or eax, PG_UW
164	serge	279	mov ecx, [pg_count]
		280	cld
378	serge	281	@@:
388	serge	282	stosd
		283	add eax, 0x1000
		284	dec ecx
		285	jnz @B
		286
164	serge	287
378	serge	288	mov eax, cr3 ;flush TLB
164	serge	289	mov cr3, eax
		290
		291
		292	endp
		293
		294
		295	proc new_mem_resize stdcall, new_size:dword
		296
		297
276	serge	298	call wait_mutex ;ebx
		299
164	serge	300
		301	add edi,4095
		302	and edi,not 4095
		303	mov [new_size], edi
		304
		305
		306	shl edx,8
		307	cmp [SLOT_BASE+APPDATA.heap_base+edx],0
380	serge	308	jne .exit
172	serge	309
		310
380	serge	311	add esi, 4095
164	serge	312	and esi, not 4095
		313
		314
		315	jae .expand
		316
		317
		318	shr esi, 12
		319	@@:
		320	mov eax, [app_page_tabs+edi*4]
378	serge	321	test eax, 1
164	serge	322	jz .next
		323	mov dword [app_page_tabs+edi*4], 2
378	serge	324	mov ebx, edi
164	serge	325	shl ebx, 12
		326	invlpg [ebx+std_application_base_address]
		327	call free_page
		328
		329
		330	cmp edi, esi
		331	jb @B
		332
		333
		334	mov ebx, [new_size]
294	diamond	335	call update_mem_size
		336
164	serge	337
		338	dec [pg_data.pg_mutex]
		339	ret
		340
		341
		342	add edi, new_app_base
		343	add esi, new_app_base
		344
		345
		346	push edi
		347
		348
		349	and edi, not(0x3FFFFF)
		350	add esi, 0x3FFFFF
		351	and esi, not(0x3FFFFF)
		352
		353
		354	jae .grow
		355
		356
		357
		358
		359	call alloc_page
		360	test eax, eax
		361	jz .exit
		362
		363
188	serge	364
164	serge	365
		366	shr edi, 10
		367	add edi, page_tabs
365	serge	368	mov ecx, 1024
164	serge	369	xor eax, eax
		370	cld
		371	rep stosd
		372	pop edi
		373
		374
		375	cmp edi, esi
		376	jb @B
		377	.grow:
		378	pop edi
		379	pop esi
		380	@@:
		381	call alloc_page
		382	test eax, eax
		383	jz .exit
		384	stdcall map_page,esi,eax,dword PG_UW
		385
		386
		387	mov edi, esi
		388	xor eax, eax
		389	mov ecx, 1024
		390	cld
		391	rep stosd
		392	pop edi
		393
		394
		395	cmp esi, edi
		396	jb @B
294	diamond	397
164	serge	398
		399	.exit:
		400	xor eax, eax
		401	inc eax
		402	dec [pg_data.pg_mutex]
		403	ret
		404	endp
		405
		406
294	diamond	407	; in: edx = slot shl 8
		408	; ebx = new memory size
		409	; destroys eax,ecx,edx
		410
		411
380	serge	412	;search threads and update
294	diamond	413	;application memory size infomation
		414	mov ecx,[SLOT_BASE+APPDATA.dir_table+edx]
380	serge	415	mov eax,2
294	diamond	416
		417
		418	;eax = current slot
		419	;ebx = new memory size
		420	;ecx = page directory
		421	cmp eax,[TASK_COUNT]
		422	jg .search_threads_end
		423	mov edx,eax
		424	shl edx,5
		425	cmp word [CURRENT_TASK+edx+TASKDATA.state],9 ;if slot empty?
		426	jz .search_threads_next
		427	shl edx,3
		428	cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread?
380	serge	429	jnz .search_threads_next
294	diamond	430	mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size
380	serge	431	.search_threads_next:
294	diamond	432	inc eax
		433	jmp .search_threads
		434	.search_threads_end:
		435	ret
		436
		437
285	serge	438	; eax= linear address
		439	;
		440	; retval
		441	; eax= phisical page address
		442
		443
164	serge	444	get_pg_addr:
285	serge	445	shr eax, 12
		446	mov eax, [page_tabs+eax*4]
365	serge	447	and eax, 0xFFFFF000
164	serge	448	ret
		449
		450
188	serge	451	proc page_fault_handler
164	serge	452	pushad
		453
		454
388	serge	455	push edx
		456	mov edx, 0x400 ;bocsh
		457	mov al,0xff ;bocsh
		458	out dx, al ;bocsh
		459	pop edx
		460	pop eax
		461
		462
164	serge	463	mov eax, cr2
		464	push eax
172	serge	465	push ds
164	serge	466	push es
188	serge	467
164	serge	468
		469	mov ds, ax
		470	mov es, ax
188	serge	471
164	serge	472
188	serge	473
		474
164	serge	475
		476
378	serge	477	jae .kernel_space
394	serge	478
164	serge	479
395	serge	480	jae .tab_space
394	serge	481
		482
378	serge	483	jae .alloc
188	serge	484
		485
378	serge	486	jae .lfb_addr
		487
		488
395	serge	489	; jb .exit
		490
		491
164	serge	492	shr ebx, 12
		493	mov ecx, ebx
172	serge	494	shr ecx, 10
		495	mov edx, [master_tab+ecx*4]
		496	test edx, 1
		497	jz .fail
		498
		499
365	serge	500	test eax, 2
164	serge	501	jz .fail
172	serge	502	.alloc:
188	serge	503	call alloc_page
164	serge	504	and eax, eax
		505	jz .exit
		506
		507
		508
		509
188	serge	510	and edi, 0xFFFFF000
		511	mov ecx, 1024
164	serge	512	xor eax, eax
		513	cld
188	serge	514	rep stosd
		515	.exit:
164	serge	516	pop es
188	serge	517	pop ds
164	serge	518	mov esp, ebp
		519	popad
		520	add esp, 4
		521	iretd
		522	.fail:
172	serge	523	pop es
188	serge	524	pop ds
172	serge	525	mov esp, ebp
		526	popad
		527	add esp, 4
		528	iretd
388	serge	529
164	serge	530
172	serge	531
		532
		533	jmp exc_c
		534	iretd
		535
		536
164	serge	537	; shr ebx, 12
188	serge	538	; mov eax, [page_tabs+ebx*4]
365	serge	539	; shr ebx, 10
188	serge	540	; mov eax, [master_tab+ebx*4]
		541	jmp .exit
		542	.old_addr:
164	serge	543	; shr ebx, 12
188	serge	544	; mov eax, [page_tabs+ebx*4]
365	serge	545	; shr ebx, 10
188	serge	546	; mov eax, [master_tab+ebx*4]
		547	jmp .exit
		548	.lfb_addr:
164	serge	549	; shr ebx, 22
188	serge	550	; ;mov ecx, [sys_page_dir]
		551	; mov eax, [master_tab+ebx*4]
		552	jmp .exit
		553	.tab_space:
164	serge	554	; shr ebx, 12
188	serge	555	; mov eax, [page_tabs+ebx*4]
365	serge	556	; shr ebx, 10
188	serge	557	; ;mov ecx, [sys_page_dir]
		558	; mov eax, [master_tab+ebx*4]
		559	jmp .exit
		560	endp
164	serge	561
		562
		563	proc map_mem stdcall, lin_addr:dword,pdir:dword,\
		564	ofs:dword,buf_size:dword
		565	mov eax, [buf_size]
		566	test eax, eax
		567	jz .exit
		568
		569
		570	and eax, 0xFFFFF000
		571
		572
		573	mov ebx, [ofs]
		574	shr ebx, 22
		575	mov esi, [ipc_pdir]
		576	mov edi, [ipc_ptab]
		577	mov eax, [esi+ebx*4]
		578	and eax, 0xFFFFF000
		579	test eax, eax
		580	jz .exit
		581	stdcall map_page,edi,eax,dword PG_UW
		582	; inc ebx
		583	; add edi, 0x1000
		584	; mov eax, [esi+ebx*4]
		585	; test eax, eax
		586	; jz @f
		587	; and eax, 0xFFFFF000
		588	; stdcall map_page, edi, eax
		589
		590
		591	and edi, 0xFFFFF000
		592	mov ecx, [buf_size]
		593	add ecx, 4095
		594	shr ecx, 12
		595	inc ecx
		596
		597
		598	shr edx, 12
		599	and edx, 0x3FF
		600	mov esi, [ipc_ptab]
		601
		602
		603	and eax, 0xFFFFF000
		604	test eax, eax
		605	jz .exit
		606	stdcall map_page,edi,eax,dword PG_UW
		607	add edi, 0x1000
		608	inc edx
		609	dec ecx
		610	jnz .map
		611
		612
		613	ret
		614	endp
		615
		616
		617	proc map_memEx stdcall, lin_addr:dword,pdir:dword,\
		618	ofs:dword,buf_size:dword
		619	mov eax, [buf_size]
		620	test eax, eax
		621	jz .exit
		622
		623
		624	and eax, 0xFFFFF000
		625
		626
		627	mov ebx, [ofs]
		628	shr ebx, 22
		629	mov esi, [proc_mem_pdir]
		630	mov edi, [proc_mem_tab]
		631	mov eax, [esi+ebx*4]
		632	and eax, 0xFFFFF000
		633	test eax, eax
		634	jz .exit
		635	stdcall map_page,edi,eax,dword PG_UW
		636
		637
		638	and edi, 0xFFFFF000
		639	mov ecx, [buf_size]
		640	add ecx, 4095
		641	shr ecx, 12
		642	inc ecx
		643
		644
		645	shr edx, 12
		646	and edx, 0x3FF
		647	mov esi, [proc_mem_tab]
		648
		649
		650	; and eax, 0xFFFFF000
		651	; test eax, eax
		652	; jz .exit
		653	stdcall map_page,edi,eax,dword PG_UW
		654	add edi, 0x1000
		655	inc edx
		656	dec ecx
		657	jnz .map
		658	.exit:
		659	ret
		660	endp
		661
		662
		663
		664
		665
		666	;input:
		667	; eax=1 - set ipc buffer area
		668	; ebx=address of buffer
		669	; ecx=size of buffer
		670	; eax=2 - send message
		671	; ebx=PID
		672	; ecx=address of message
		673	; edx=size of message
		674
		675
		676	jne @f
		677	call set_ipc_buff
		678	mov [esp+36], eax
		679	ret
		680	@@:
		681	cmp eax, 2
		682	jne @f
		683	stdcall sys_ipc_send, ebx, ecx, edx
		684	mov [esp+36], eax
		685	ret
		686	@@:
		687	xor eax, eax
		688	not eax
		689	mov [esp+36], eax
		690	ret
		691
		692
		693	proc set_ipc_buff
		694
		695
		696	shl eax,8
		697	add eax, SLOT_BASE
380	serge	698	pushf
164	serge	699	cli
		700	mov [eax+0xA0],ebx ;set fields in extended information area
		701	mov [eax+0xA4],ecx
		702
		703
		704	add ecx, ebx
		705	add ecx, 4095
		706	and ecx, not 4095
		707
		708
		709	add ebx, 0x1000
		710	cmp ebx, ecx
		711	jna .touch
		712
		713
		714	xor eax, eax
		715	ret
		716	endp
		717
		718
		719	locals
		720	dst_slot dd ?
		721	dst_offset dd ?
		722	buf_size dd ?
		723	endl
		724
		725
		726	cli
		727
		728
		729	call pid_to_slot
		730	test eax,eax
		731	jz .no_pid
		732
		733
		734	shl eax,8
		735	mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined?
380	serge	736	test edi,edi
164	serge	737	jz .no_ipc_area
		738
		739
		740	add edi, new_app_base
		741	and ebx, 0xFFF
		742	mov [dst_offset], ebx
		743
		744
380	serge	745	mov [buf_size], esi
164	serge	746
		747
380	serge	748	edi, esi
164	serge	749
		750
		751	add edi, [ipc_tmp]
		752	cmp dword [edi], 0
		753	jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now
		754
227	serge	755
164	serge	756	mov edx, ebx
		757	add ebx, 8
		758	add ebx, [msg_size]
		759	cmp ebx, [buf_size]
		760	ja .buffer_overflow ;esi<0 - not enough memory in buffer
		761
227	serge	762
164	serge	763	mov eax,[TASK_BASE]
		764	mov eax, [eax+0x04] ;eax - our PID
		765	mov edi, [dst_offset]
		766	add edi, [ipc_tmp]
		767	add edi, edx
		768	mov [edi], eax
		769	mov ecx, [msg_size]
		770
		771
		772	add edi, 8
		773	mov esi, [msg_addr]
		774	add esi, new_app_base
		775	cld
		776	rep movsb
		777
		778
		779	mov edx, ebx
		780	shr ebx, 12
		781	xor eax, eax
		782	mov [page_tabs+ebx*4], eax
365	serge	783	invlpg [edx]
164	serge	784
		785
		786	mov edx, ebx
		787	shr ebx, 12
		788	xor eax, eax
		789	mov [page_tabs+ebx*4], eax
365	serge	790	invlpg [edx]
164	serge	791
		792
		793	mov edx, ebx
		794	shr ebx, 12
		795	xor eax, eax
		796	mov [page_tabs+ebx*4], eax
365	serge	797	invlpg [edx]
164	serge	798
		799
		800	shl eax, 8
		801	or [eax+SLOT_BASE+0xA8],dword 0x40
380	serge	802	cmp dword [check_idle_semaphore],20
164	serge	803	jge .ipc_no_cis
		804
		805
		806	.ipc_no_cis:
		807	popf
		808	xor eax, eax
		809	ret
		810	.no_pid:
		811	popf
		812	mov eax, 4
		813	ret
		814	.no_ipc_area:
		815	popf
		816	xor eax, eax
		817	inc eax
		818	ret
		819	.ipc_blocked:
		820	popf
		821	mov eax, 2
		822	ret
		823	.buffer_overflow:
		824	popf
		825	mov eax, 3
		826	ret
		827	endp
		828
		829
		830	sysfn_meminfo:
170	serge	831
164	serge	832
170	serge	833	cmp ebx, new_app_base
172	serge	834	jb .fail
		835
		836
164	serge	837	mov [ebx], eax
170	serge	838	shl eax, 12
172	serge	839	mov [esp+36], eax
		840	mov ecx, [pg_data.pages_free]
170	serge	841	mov [ebx+4], ecx
		842	mov edx, [pg_data.pages_faults]
		843	mov [ebx+8], edx
		844	mov esi, [heap_size]
		845	mov [ebx+12], esi
		846	mov edi, [heap_free]
		847	mov [ebx+16], edi
		848	mov eax, [heap_blocks]
		849	mov [ebx+20], eax
		850	mov ecx, [free_blocks]
		851	mov [ebx+24], ecx
		852	ret
164	serge	853	.fail:
172	serge	854	mov dword [esp+36], -1
		855	ret
		856
164	serge	857
		858	new_services:
		859
		860
		861	jle sys_sheduler
		862
		863
170	serge	864	jb .fail
164	serge	865	ja @f
		866
		867
188	serge	868	mov [esp+36], eax
164	serge	869	ret
		870	@@:
		871	cmp eax, 12
		872	ja @f
		873
		874
		875	mov [esp+36], eax
		876	ret
		877	@@:
		878	cmp eax, 13
		879	ja @f
		880	add ebx, new_app_base
188	serge	881	stdcall user_free, ebx
164	serge	882	mov [esp+36], eax
		883	ret
		884	@@:
		885	cmp eax, 14
		886	ja @f
		887	add ebx, new_app_base
227	serge	888	cmp ebx, new_app_base
172	serge	889	jb .fail
		890	stdcall get_event_ex, ebx, ecx
227	serge	891	mov [esp+36], eax
		892	ret
164	serge	893	@@:
		894	cmp eax, 15
		895	ja @f
		896	mov ecx, [CURRENT_TASK]
		897	shl ecx, 8
		898	mov eax, [ecx+SLOT_BASE+APPDATA.fpu_handler]
380	serge	899	mov [ecx+SLOT_BASE+APPDATA.fpu_handler], ebx
		900	mov [esp+36], eax
164	serge	901	ret
		902	@@:
		903	cmp eax, 16
		904	ja @f
		905
		906
188	serge	907	jz .fail
		908	add ebx, new_app_base
164	serge	909	cmp ebx, new_app_base
172	serge	910	jb .fail
		911	stdcall get_service, ebx
164	serge	912	mov [esp+36], eax
		913	ret
		914	@@:
		915	cmp eax, 17
		916	ja @f
		917	call srv_handlerEx ;ebx
378	serge	918	mov [esp+36], eax
164	serge	919	ret
		920	@@:
168	serge	921	cmp eax, 18
		922	ja @f
		923	mov ecx, [CURRENT_TASK]
		924	shl ecx, 8
		925	mov eax, [ecx+SLOT_BASE+APPDATA.sse_handler]
380	serge	926	mov [ecx+SLOT_BASE+APPDATA.sse_handler], ebx
		927	mov [esp+36], eax
168	serge	928	ret
		929	@@:
164	serge	930	cmp eax, 19
198	serge	931	ja .fail
227	serge	932	add ebx, new_app_base
198	serge	933	cmp ebx, new_app_base
		934	jb .fail
		935	stdcall load_library, ebx
		936	mov [esp+36], eax
		937	ret
		938
227	serge	939
164	serge	940	xor eax, eax
		941	mov [esp+36], eax
		942	ret
		943
		944
		945	proc init_mtrr
		946
		947
388	serge	948	je .exit
164	serge	949
		950
211	serge	951	jnc .exit
		952
		953
164	serge	954	or eax, 0x60000000 ;disable caching
		955	mov cr0, eax
		956	wbinvd ;invalidate cache
		957
		958
		959	rdmsr ;
		960	push eax
		961
		962
		963	xor eax, eax
		964	mov ecx, 0x2FF
		965	wrmsr ;disable all MTRR
		966
		967
		968	stdcall set_mtrr, dword 1,[LFBAddress],[LFBSize],MEM_WC
		969	xor edx, edx
		970	xor eax, eax
		971	mov ecx, 0x204
		972	mov ebx, 6
		973	@@:
		974	wrmsr ;disable unused MTRR
		975	inc ecx
		976	wrmsr
		977	inc ecx
		978	dec ebx
		979	jnz @b
		980
		981
		982
		983
		984	or eax, 0x800 ;set default memtype to UC
		985	and al, 0xF0
		986	mov ecx, 0x2FF
		987	wrmsr ;and enable MTRR
		988
		989
		990	and eax, not 0x60000000
		991	mov cr0, eax ; enable caching
		992	.exit:
		993	ret
		994	endp
		995
		996
		997	proc set_mtrr stdcall, reg:dword,base:dword,size:dword,mem_type:dword
		998
		999
		1000	mov eax, [base]
		1001	or eax, [mem_type]
		1002	mov ecx, [reg]
		1003	lea ecx, [0x200+ecx*2]
		1004	wrmsr
		1005
		1006
		1007	dec ebx
		1008	mov eax, 0xFFFFFFFF
		1009	mov edx, 0x0000000F
		1010	sub eax, ebx
		1011	sbb edx, 0
		1012	or eax, 0x800
		1013	inc ecx
		1014	wrmsr
		1015	ret
		1016	endp
		1017
		1018
388	serge	1019
172	serge	1020	proc strncmp stdcall, str1:dword, str2:dword, count:dword
388	serge	1021
		1022
		1023	jecxz .end
		1024
		1025
		1026
		1027
		1028	mov esi,edi
		1029	xor eax,eax
		1030	repne scasb
		1031	neg ecx ; cx = count - strlen
		1032	add ecx,ebx ; strlen + count - strlen
		1033
		1034
		1035	mov edi,esi
		1036	mov esi,[str2]
		1037	repe cmpsb
		1038	mov al,[esi-1]
		1039	xor ecx,ecx
		1040
		1041
		1042	ja .str2_big
		1043	je .end
		1044
		1045
		1046	sub ecx,2
		1047
		1048
		1049	not ecx
		1050	.end:
		1051	mov eax,ecx
		1052	ret
		1053	endp
		1054
		1055
		1056	proc stall stdcall, delay:dword
172	serge	1057	push ecx
		1058	push edx
		1059	push ebx
		1060	push eax
		1061
		1062
		1063	mul [stall_mcs]
		1064	mov ebx, eax ;low
		1065	mov ecx, edx ;high
		1066	rdtsc
		1067	add ebx, eax
		1068	adc ecx,edx
		1069	@@:
		1070	rdtsc
		1071	sub eax, ebx
		1072	sbb edx, ecx
		1073	jb @B
		1074
		1075
		1076	pop ebx
		1077	pop edx
		1078	pop ecx
		1079	ret
		1080	endp
		1081
		1082
164	serge	1083	k_strrchr:
237	serge	1084	push eax
		1085	xor eax,eax
		1086	or ecx,-1
		1087	repne scasb
		1088	add ecx,1
		1089	neg ecx
		1090	sub edi,1
		1091	pop eax
		1092	std
		1093	repne scasb
		1094	cld
		1095	add edi,1
		1096
		1097
		1098	jne @F
		1099	mov eax,edi
		1100	ret
		1101	@@:
		1102	xor eax,eax
		1103	ret
		1104
		1105
		1106	proc k_strncpy stdcall, dest:dword, src:dword, maxlen:dword
		1107	mov eax, [dest]
		1108	mov esi, [src]
		1109	mov ecx, [maxlen]
		1110	test eax, eax
		1111	jz .L9
		1112	test esi, esi
		1113	jz .L9
		1114	test ecx, ecx
		1115	jz .L9
		1116
		1117
		1118	jmp .L1
		1119
		1120
		1121	.L2:
		1122	mov edx, [esi+eax]
		1123	mov [eax], dl
		1124	test dl, dl
		1125	jz .L7
		1126
		1127
		1128	test dh, dh
		1129	jz .L6
		1130
		1131
		1132	mov [eax+2],dl
		1133	test dl, dl
		1134	jz .L5
		1135
		1136
		1137	test dh, dh
		1138	jz .L4
		1139	add eax, 4
		1140	.L1:
		1141	sub ecx, 4
		1142	jae .L2
		1143
		1144
		1145	jz .L9
		1146
		1147
		1148	mov [eax], dl
		1149	test dl, dl
		1150	jz .L3
		1151
		1152
		1153	dec ecx
		1154	jz .L9
		1155
		1156
		1157	mov [eax], dl
		1158	test dl, dl
		1159	jz .L3
		1160
		1161
		1162	dec ecx
		1163	jz .L9
		1164
		1165
		1166	mov [eax], dl
		1167	test dl, dl
		1168	jz .L3
		1169
		1170
		1171	jmp .L9
		1172
		1173
		1174	inc eax
		1175
		1176
		1177	inc eax
		1178
		1179
		1180	inc eax
		1181	.L7:
		1182	add ecx,3
		1183	jz .L9
		1184	.L8:
		1185	mov byte [ecx+eax], 0
		1186	.L3:
		1187	dec ecx
		1188	jnz .L8
		1189	.L9:
		1190	ret
		1191	endp
		1192
		1193
		1194
		1195
		1196
		1197
		1198	mov eax,[esp+4]
		1199	mov edx, 3
		1200
		1201
		1202	jz .L1
		1203	jp .L0
		1204
		1205
		1206	je .L2
		1207
		1208
		1209	cmp dh, byte [eax]
		1210
		1211
		1212
		1213
		1214	xor edx, 2
		1215
		1216
		1217	.L0:
		1218	cmp dh, [eax]
		1219	je .L2
		1220
		1221
		1222	xor edx, edx
		1223
		1224
		1225	mov ecx, [eax]
		1226	add eax, 4
		1227
		1228
		1229	add ecx, magic
		1230
		1231
		1232	jnc .L3
		1233
		1234
		1235	and edx, not magic
		1236	jne .L3
		1237
		1238
		1239	add eax, 4
		1240
		1241
		1242	add ecx, magic
		1243	dec edx
		1244	jnc .L3
		1245
		1246
		1247	and edx, not magic
		1248	jne .L3
		1249
		1250
		1251	add eax, 4
		1252
		1253
		1254	add ecx, magic
		1255
		1256
		1257	jnc .L3
		1258
		1259
		1260
		1261
		1262	jne .L3
		1263
		1264
		1265	add eax, 4
		1266
		1267
		1268	add ecx, magic
		1269
		1270
		1271	jnc .L3
		1272
		1273
		1274
		1275
		1276	je .L1
		1277
		1278
		1279	sub ecx, magic
		1280
		1281
		1282	jz .L2
		1283
		1284
		1285	test ch, ch
		1286	jz .L2
		1287
		1288
		1289	inc eax
		1290
		1291
		1292	jz .L2
		1293
		1294
		1295
		1296
		1297	sub eax, [esp+4]
		1298	ret
		1299
		1300
		1301
388	serge	1302
		1303	push eax
		1304	push edx
		1305	mov edx, 0x400 ;bocsh
		1306	mov al,0xff ;bocsh
		1307	out dx, al ;bocsh
		1308	pop edx
		1309	pop eax
		1310	end if
		1311

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(root)/kernel/branches/flat_kernel/core/memory.inc @ 432 – Rev 400