WebSVN – Kolibri OS – Blame – /kernel/branches/kolibri-process/init.inc

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4429	Serge	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
		8	$Revision: 4390 $
		9
		10
		11	MEM_WB equ 6 ;write-back memory
		12	MEM_WC equ 1 ;write combined memory
		13	MEM_UC equ 0 ;uncached memory
		14
		15	align 4
		16	proc mem_test
		17	; if we have BIOS with fn E820, skip the test
		18	cmp dword [BOOT_VARS-OS_BASE + 0x9100], 0
		19	jnz .ret
		20
		21	mov eax, cr0
		22	and eax, not (CR0_CD+CR0_NW)
		23	or eax, CR0_CD ;disable caching
		24	mov cr0, eax
		25	wbinvd ;invalidate cache
		26
		27	xor edi, edi
		28	mov ebx, 'TEST'
		29	@@:
		30	add edi, 0x100000
		31	xchg ebx, dword [edi]
		32	cmp dword [edi], 'TEST'
		33	xchg ebx, dword [edi]
		34	je @b
		35
		36	and eax, not (CR0_CD+CR0_NW) ;enable caching
		37	mov cr0, eax
		38	inc dword [BOOT_VARS-OS_BASE + 0x9100]
		39	xor eax, eax
		40	mov [BOOT_VARS-OS_BASE + 0x9104], eax
		41	mov [BOOT_VARS-OS_BASE + 0x9108], eax
		42	mov [BOOT_VARS-OS_BASE + 0x910C], edi
		43	mov [BOOT_VARS-OS_BASE + 0x9110], eax
		44	inc eax
		45	mov [BOOT_VARS-OS_BASE + 0x9114], eax
		46	.ret:
		47	ret
		48	endp
		49
		50	align 4
		51	proc init_mem
		52	; calculate maximum allocatable address and number of allocatable pages
		53	mov edi, BOOT_VARS-OS_BASE + 0x9104
		54	mov ecx, [edi-4]
		55	xor esi, esi; esi will hold total amount of memory
		56	xor edx, edx; edx will hold maximum allocatable address
		57	.calcmax:
		58	; round all to pages
		59	mov eax, [edi]
		60	cmp [edi+16], byte 1
		61	jne .unusable
		62
		63	test eax, 0xFFF
		64	jz @f
		65	neg eax
		66	and eax, 0xFFF
		67	add [edi], eax
		68	adc dword [edi+4], 0
		69	sub [edi+8], eax
		70	sbb dword [edi+12], 0
		71	jc .unusable
		72	@@:
		73	and dword [edi+8], not 0xFFF
		74	jz .unusable
		75	; ignore memory after 4 Gb
		76	cmp dword [edi+4], 0
		77	jnz .unusable
		78	mov eax, [edi]
		79	cmp dword [edi+12], 0
		80	jnz .overflow
		81	add eax, [edi+8]
		82	jnc @f
		83	.overflow:
		84	mov eax, 0xFFFFF000
		85	@@:
		86	cmp edx, eax
		87	jae @f
		88	mov edx, eax
		89	@@:
		90	sub eax, [edi]
		91	mov [edi+8], eax
		92	add esi, eax
		93	jmp .usable
		94	.unusable:
		95	; and dword [edi+8], 0
		96	.usable:
		97	add edi, 20
		98	loop .calcmax
		99	.calculated:
		100	mov [MEM_AMOUNT-OS_BASE], esi
		101	mov [pg_data.mem_amount-OS_BASE], esi
		102	shr esi, 12
		103	mov [pg_data.pages_count-OS_BASE], esi
		104
		105	shr edx, 12
		106	add edx, 31
		107	and edx, not 31
		108	shr edx, 3
		109	mov [pg_data.pagemap_size-OS_BASE], edx
		110
		111	add edx, (sys_pgmap-OS_BASE)+4095
		112	and edx, not 4095
		113	mov [tmp_page_tabs], edx
		114
		115	mov edx, esi
		116	and edx, -1024
		117	cmp edx, (OS_BASE/4096)
		118	jbe @F
		119	mov edx, (OS_BASE/4096)
		120	jmp .set
		121	@@:
		122	cmp edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096
		123	jae .set
		124	mov edx, (HEAP_BASE-OS_BASE+HEAP_MIN_SIZE)/4096
		125	.set:
		126	mov [pg_data.kernel_pages-OS_BASE], edx
		127	shr edx, 10
		128	mov [pg_data.kernel_tables-OS_BASE], edx
		129
		130	xor eax, eax
		131	mov edi, sys_proc-OS_BASE
		132	mov ecx, 8192/4
		133	cld
		134	rep stosd
		135
		136	mov edx, (sys_proc-OS_BASE+PROC.pdt_0)+ 0x800; (OS_BASE shr 20)
		137	bt [cpu_caps-OS_BASE], CAPS_PSE
		138	jnc .no_PSE
		139
		140	mov ebx, cr4
		141	or ebx, CR4_PSE
		142	mov eax, PG_LARGE+PG_SW
		143	mov cr4, ebx
		144	dec [pg_data.kernel_tables-OS_BASE]
		145
		146	mov [edx], eax
		147	add edx, 4
		148
		149	mov edi, [tmp_page_tabs]
		150	jmp .map_kernel_heap ; new kernel fits to the first 4Mb - nothing to do with ".map_low"
		151	.no_PSE:
		152	mov eax, PG_SW
		153	mov ecx, [tmp_page_tabs]
		154	shr ecx, 12
		155	.map_low:
		156	mov edi, [tmp_page_tabs]
		157	@@: ;
		158	stosd
		159	add eax, 0x1000
		160	dec ecx
		161	jnz @B
		162
		163	.map_kernel_heap:
		164	mov ecx, [pg_data.kernel_tables-OS_BASE]
		165	shl ecx, 10
		166	xor eax, eax
		167	rep stosd
		168
		169	mov ecx, [pg_data.kernel_tables-OS_BASE]
		170	mov eax, [tmp_page_tabs]
		171	or eax, PG_SW
		172	mov edi, edx
		173
		174	.map_kernel_tabs:
		175	stosd
		176	add eax, 0x1000
		177	dec ecx
		178	jnz .map_kernel_tabs
		179
		180	mov dword [sys_proc-OS_BASE+PROC.pdt_0+(page_tabs shr 20)], sys_proc+PROC.pdt_0+PG_SW-OS_BASE
		181
		182	mov edi, (sys_proc+PROC.pdt_0-OS_BASE)
		183	lea esi, [edi+(OS_BASE shr 20)]
		184	movsd
		185	movsd
		186	ret
		187	endp
		188
		189	align 4
		190	proc init_page_map
		191	; mark all memory as unavailable
		192	mov edi, sys_pgmap-OS_BASE
		193	mov ecx, [pg_data.pagemap_size-OS_BASE]
		194	shr ecx, 2
		195	xor eax, eax
		196	cld
		197	rep stosd
		198
		199	; scan through memory map and mark free areas as available
		200	mov ebx, BOOT_VARS-OS_BASE + 0x9104
		201	mov edx, [ebx-4]
		202	.scanmap:
		203	cmp [ebx+16], byte 1
		204	jne .next
		205
		206	mov ecx, [ebx+8]
		207	shr ecx, 12; ecx = number of pages
		208	jz .next
		209	mov edi, [ebx]
		210	shr edi, 12; edi = first page
		211	mov eax, edi
		212	shr edi, 5
		213	shl edi, 2
		214	add edi, sys_pgmap-OS_BASE
		215	and eax, 31
		216	jz .startok
		217	add ecx, eax
		218	sub ecx, 32
		219	jbe .onedword
		220	push ecx
		221	mov ecx, eax
		222	or eax, -1
		223	shl eax, cl
		224	or [edi], eax
		225	add edi, 4
		226	pop ecx
		227	.startok:
		228	push ecx
		229	shr ecx, 5
		230	or eax, -1
		231	rep stosd
		232	pop ecx
		233	and ecx, 31
		234	neg eax
		235	shl eax, cl
		236	dec eax
		237	or [edi], eax
		238	jmp .next
		239	.onedword:
		240	add ecx, 32
		241	sub ecx, eax
		242	@@:
		243	bts [edi], eax
		244	inc eax
		245	loop @b
		246	.next:
		247	add ebx, 20
		248	dec edx
		249	jnz .scanmap
		250
		251	; mark kernel memory as allocated (unavailable)
		252	mov ecx, [tmp_page_tabs]
		253	mov edx, [pg_data.pages_count-OS_BASE]
		254	shr ecx, 12
		255	add ecx, [pg_data.kernel_tables-OS_BASE]
		256	sub edx, ecx
		257	mov [pg_data.pages_free-OS_BASE], edx
		258
		259	mov edi, sys_pgmap-OS_BASE
		260	mov ebx, ecx
		261	shr ecx, 5
		262	xor eax, eax
		263	rep stosd
		264
		265	not eax
		266	mov ecx, ebx
		267	and ecx, 31
		268	shl eax, cl
		269	and [edi], eax
		270	add edi, OS_BASE
		271	mov [page_start-OS_BASE], edi;
		272
		273	mov ebx, sys_pgmap
		274	add ebx, [pg_data.pagemap_size-OS_BASE]

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