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kolibrios/kernel/trunk/init.inc
Iliya Mihailov (Ghost) 251159e3c5 Small bug fix in init_BIOS32 
git-svn-id: svn://kolibrios.org@756 a494cfbc-eb01-0410-851d-a64ba20cac60
2008-02-24 04:04:33 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
MEM_WB equ 6 ;write-back memory
MEM_WC equ 1 ;write combined memory
MEM_UC equ 0 ;uncached memory
align 4
proc mem_test
mov eax, cr0
and eax, not (CR0_CD+CR0_NW)
or eax, CR0_CD ;disable caching
mov cr0, eax
wbinvd ;invalidate cache
xor edi, edi
mov ebx, 'TEST'
@@:
add edi, 0x100000
xchg ebx, dword [edi]
cmp dword [edi], 'TEST'
xchg ebx, dword [edi]
je @b
mov [MEM_AMOUNT-OS_BASE], edi
and eax, not (CR0_CD+CR0_NW) ;enable caching
mov cr0, eax
mov eax, edi
ret
endp
align 4
proc init_mem
mov eax, [MEM_AMOUNT-OS_BASE]
mov [pg_data.mem_amount-OS_BASE], eax
shr eax, 12
mov edx, eax
mov [pg_data.pages_count-OS_BASE], eax
shr eax, 3
mov [pg_data.pagemap_size-OS_BASE], eax
add eax, (sys_pgmap-OS_BASE)+4095
and eax, not 4095
mov [tmp_page_tabs], eax
cmp edx, (OS_BASE/4096)
jbe @F
mov edx, (OS_BASE/4096)
jmp .set
@@:
cmp edx, (HEAP_MIN_SIZE/4096)
jae .set
mov edx, (HEAP_MIN_SIZE/4096)
.set:
mov [pg_data.kernel_pages-OS_BASE], edx
shr edx, 10
mov [pg_data.kernel_tables-OS_BASE], edx
xor eax, eax
mov edi, sys_pgdir-OS_BASE
mov ecx, 4096/4
cld
rep stosd
mov edx, (sys_pgdir-OS_BASE)+ 0x800; (OS_BASE shr 20)
bt [cpu_caps-OS_BASE], CAPS_PSE
jnc .no_PSE
mov ebx, cr4
or ebx, CR4_PSE
mov eax, PG_LARGE+PG_SW
mov cr4, ebx
dec [pg_data.kernel_tables-OS_BASE]
mov [edx], eax
add eax, 0x00400000
add edx, 4
mov eax, 0x400000+PG_SW
mov ecx, [tmp_page_tabs]
sub ecx, 0x400000
shr ecx, 12 ;ecx/=4096
jmp .map_low
.no_PSE:
mov eax, PG_SW
mov ecx, [tmp_page_tabs]
shr ecx, 12
.map_low:
mov edi, [tmp_page_tabs]
@@: ;
stosd
add eax, 0x1000
dec ecx
jnz @B
mov ecx, [pg_data.kernel_tables-OS_BASE]
shl ecx, 10
xor eax, eax
rep stosd
mov ecx, [pg_data.kernel_tables-OS_BASE]
mov eax, [tmp_page_tabs]
or eax, PG_SW
mov edi, edx
.map_kernel_tabs:
stosd
add eax, 0x1000
dec ecx
jnz .map_kernel_tabs
mov dword [sys_pgdir-OS_BASE+(page_tabs shr 20)], sys_pgdir+PG_SW-OS_BASE
mov edi, (sys_pgdir-OS_BASE)
lea esi, [edi+(OS_BASE shr 20)]
movsd
movsd
ret
endp
align 4
proc init_page_map
mov edi, sys_pgmap-OS_BASE
mov ecx, [pg_data.pagemap_size-OS_BASE]
shr ecx, 2
or eax, -1
cld
rep stosd
mov ecx, [tmp_page_tabs]
mov edx, [pg_data.pages_count-OS_BASE]
shr ecx, 12
add ecx, [pg_data.kernel_tables-OS_BASE]
sub edx, ecx
mov [pg_data.pages_free-OS_BASE], edx
mov edi, sys_pgmap-OS_BASE
mov ebx, ecx
shr ecx, 5
xor eax, eax
rep stosd
not eax
mov ecx, ebx
and ecx, 31
shl eax, cl
mov [edi], eax
add edi, OS_BASE
mov [page_start-OS_BASE], edi;
mov ebx, sys_pgmap
add ebx, [pg_data.pagemap_size-OS_BASE]
mov [page_end-OS_BASE], ebx
mov [pg_data.pg_mutex-OS_BASE], 0
ret
endp
align 4
init_BIOS32:
mov edi, 0xE0000
.pcibios_nxt:
cmp dword[edi], '_32_' ; "magic" word
je .BIOS32_found
.pcibios_nxt2:
add edi, 0x10
cmp edi, 0xFFFF0
je .BIOS32_not_found
jmp .pcibios_nxt
.BIOS32_found: ; magic word found, check control summ
movzx ecx, byte[edi + 9]
shl ecx, 4
mov esi, edi
xor eax, eax
cld ; paranoia
@@: lodsb
add ah, al
loop @b
jnz .pcibios_nxt2 ; control summ must be zero
; BIOS32 service found !
mov ebp, [edi + 4]
mov [bios32_entry], ebp
; check PCI BIOS present
mov eax, '$PCI'
xor ebx, ebx
push cs ; special for 'ret far' from BIOS
call ebp
test al, al
jnz .PCI_BIOS32_not_found
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> PCI BIOS
add ebx, OS_BASE
dec ecx
mov [(pci_code_32-OS_BASE)], cx ;limit 0-15
mov [(pci_data_32-OS_BASE)], cx ;limit 0-15
mov [(pci_code_32-OS_BASE)+2], bx ;base 0-15
mov [(pci_data_32-OS_BASE)+2], bx ;base 0-15
shr ebx, 16
mov [(pci_code_32-OS_BASE)+4], bl ;base 16-23
mov [(pci_data_32-OS_BASE)+4], bl ;base 16-23
shr ecx, 16
and cl, 0x0F
mov ch, bh
add cx, D32
mov [(pci_code_32-OS_BASE)+6], cx ;lim 16-19 &
mov [(pci_data_32-OS_BASE)+6], cx ;base 24-31
mov [(pci_bios_entry-OS_BASE)], edx
; jmp .end
.PCI_BIOS32_not_found:
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> pci_emu_dat
.BIOS32_not_found:
.end:
ret
align 4
proc test_cpu
locals
cpu_type dd ?
cpu_id dd ?
cpu_Intel dd ?
cpu_AMD dd ?
endl
mov [cpu_type], 0
xor eax, eax
mov [cpu_caps-OS_BASE], eax
mov [cpu_caps+4-OS_BASE], eax
pushfd
pop eax
mov ecx, eax
xor eax, 0x40000
push eax
popfd
pushfd
pop eax
xor eax, ecx
mov [cpu_type], CPU_386
jz .end_cpuid
push ecx
popfd
mov [cpu_type], CPU_486
mov eax, ecx
xor eax, 0x200000
push eax
popfd
pushfd
pop eax
xor eax, ecx
je .end_cpuid
mov [cpu_id], 1
xor eax, eax
cpuid
mov [cpu_vendor-OS_BASE], ebx
mov [cpu_vendor+4-OS_BASE], edx
mov [cpu_vendor+8-OS_BASE], ecx
cmp ebx, dword [intel_str-OS_BASE]
jne .check_AMD
cmp edx, dword [intel_str+4-OS_BASE]
jne .check_AMD
cmp ecx, dword [intel_str+8-OS_BASE]
jne .check_AMD
mov [cpu_Intel], 1
cmp eax, 1
jl .end_cpuid
mov eax, 1
cpuid
mov [cpu_sign-OS_BASE], eax
mov [cpu_info-OS_BASE], ebx
mov [cpu_caps-OS_BASE], edx
mov [cpu_caps+4-OS_BASE],ecx
shr eax, 8
and eax, 0x0f
ret
.end_cpuid:
mov eax, [cpu_type]
ret
.check_AMD:
cmp ebx, dword [AMD_str-OS_BASE]
jne .unknown
cmp edx, dword [AMD_str+4-OS_BASE]
jne .unknown
cmp ecx, dword [AMD_str+8-OS_BASE]
jne .unknown
mov [cpu_AMD], 1
cmp eax, 1
jl .unknown
mov eax, 1
cpuid
mov [cpu_sign-OS_BASE], eax
mov [cpu_info-OS_BASE], ebx
mov [cpu_caps-OS_BASE], edx
mov [cpu_caps+4-OS_BASE],ecx
shr eax, 8
and eax, 0x0f
ret
.unknown:
mov eax, 1
cpuid
mov [cpu_sign-OS_BASE], eax
mov [cpu_info-OS_BASE], ebx
mov [cpu_caps-OS_BASE], edx
mov [cpu_caps+4-OS_BASE],ecx
shr eax, 8
and eax, 0x0f
ret
endp
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