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kernel: kolibri-process merged into trunk. This is my little gift to myself for my birthday.

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git-svn-id: svn://kolibrios.org@5130 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2014-09-18 07:58:56 +00:00
parent 73dfca6a00
commit 76d618357e
15 changed files with 550 additions and 679 deletions
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233
kernel/trunk/core/v86.inc
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@@ -14,9 +14,7 @@ DEBUG_SHOW_IO = 0
struct V86_machine
; page directory
pagedir dd ?
; translation table: V86 address -> flat linear address
pages dd ?
process dd ?
; mutex to protect all data from writing by multiple threads at one time
mutex dd ?
; i/o permission map
@@ -38,91 +36,87 @@ v86_create:
and dword [eax+V86_machine.mutex], 0
; allocate tables
mov ebx, eax
; We allocate 4 pages.
; First is main page directory for V86 mode.
; Second page:
; first half (0x800 bytes) is page table for addresses 0 - 0x100000,
; second half is for V86-to-linear translation.
; Third and fourth are for I/O permission map.
push 8000h ; blocks less than 8 pages are discontinuous
stdcall create_process, 4096, OS_BASE, 4096
test eax, eax
jz .fail2
mov [eax+PROC.mem_used], 4096
mov [ebx+V86_machine.process], eax
push 2000h
call kernel_alloc
test eax, eax
jz .fail2
mov [ebx+V86_machine.pagedir], eax
push edi eax
mov edi, eax
add eax, 1800h
mov [ebx+V86_machine.pages], eax
mov [ebx+V86_machine.iopm], eax
; initialize tables
mov ecx, 2000h/4
xor eax, eax
rep stosd
mov [ebx+V86_machine.iopm], edi
dec eax
mov ecx, 2000h/4
rep stosd
pop eax
; page directory: first entry is page table...
push edi
mov edi, eax
add eax, 1000h
push eax
call get_pg_addr
or al, PG_UW
stosd
; ...and also copy system page tables
; thx to Serge, system is located at high addresses
add edi, (OS_BASE shr 20) - 4
push esi
mov esi, (OS_BASE shr 20) + sys_pgdir
mov ecx, 0x80000000 shr 22
rep movsd
mov eax, -1
mov ecx, 2000h/4
rep stosd
mov eax, [ebx+V86_machine.process]
mov eax, [eax+PROC.pdt_0_phys]
pushfd
cli
mov cr3, eax
mov eax, [ebx+V86_machine.pagedir] ;root dir also is
call get_pg_addr ;used as page table
or al, PG_SW
mov [edi-4096+(page_tabs shr 20)], eax
pop esi
; now V86 specific: initialize known addresses in first Mb
pop eax
; first page - BIOS data (shared between all machines!)
; physical address = 0
; linear address = OS_BASE
mov dword [eax], 111b
mov dword [eax+800h], OS_BASE
; page before 0xA0000 - Extended BIOS Data Area (shared between all machines!)
; physical address = 0x9C000
; linear address = 0x8009C000
; (I have seen one computer with EBDA segment = 0x9D80,
; all other computers use less memory)
mov ecx, 4
mov edx, 0x9C000
push eax
lea edi, [eax+0x9C*4]
mov eax, PG_UW
mov [page_tabs], eax
invlpg [eax]
mov byte [0x500], 0xCD
mov byte [0x501], 0x13
mov byte [0x502], 0xF4
mov byte [0x503], 0xCD
mov byte [0x504], 0x10
mov byte [0x505], 0xF4
mov eax, 0x99000+PG_UW
mov edi, page_tabs+0x99*4
mov edx, 0x1000
mov ecx, 7
@@:
lea eax, [edx + OS_BASE]
mov [edi+800h], eax
lea eax, [edx + 111b]
stosd
add edx, 0x1000
add eax, edx
loop @b
pop eax
pop edi
; addresses 0xC0000 - 0xFFFFF - BIOS code (shared between all machines!)
; physical address = 0xC0000
; linear address = 0x800C0000
mov ecx, 0xC0
mov eax, 0xC0000+PG_UW
mov edi, page_tabs+0xC0*4
mov ecx, 64
@@:
mov edx, ecx
shl edx, 12
push edx
or edx, 111b
mov [eax+ecx*4], edx
pop edx
add edx, OS_BASE
mov [eax+ecx*4+0x800], edx
inc cl
jnz @b
stosd
add eax, edx
loop @b
mov eax, sys_proc
push ebx
call set_cr3
pop ebx
popfd
pop edi
mov eax, ebx
ret
.fail2:
@@ -132,15 +126,16 @@ v86_create:
xor eax, eax
ret
;not used
; Destroy V86 machine
; in: eax = handle
; out: nothing
; destroys: eax, ebx, ecx, edx (due to free)
v86_destroy:
push eax
stdcall kernel_free, [eax+V86_machine.pagedir]
pop eax
jmp free
;v86_destroy:
; push eax
; stdcall kernel_free, [eax+V86_machine.pagedir]
; pop eax
; jmp free
; Translate V86-address to linear address
; in: eax=V86 address
@@ -150,28 +145,30 @@ v86_destroy:
v86_get_lin_addr:
push ecx edx
mov ecx, eax
mov edx, [esi+V86_machine.pages]
shr ecx, 12
mov edx, [page_tabs+ecx*4]
and eax, 0xFFF
add eax, [edx+ecx*4] ; atomic operation, no mutex needed
and edx, 0xFFFFF000
or eax, edx
pop edx ecx
ret
;not used
; Sets linear address for V86-page
; in: eax=linear address (must be page-aligned)
; ecx=V86 page (NOT address!)
; esi=handle
; out: nothing
; destroys: nothing
v86_set_page:
push eax ebx
mov ebx, [esi+V86_machine.pagedir]
mov [ebx+ecx*4+0x1800], eax
call get_pg_addr
or al, 111b
mov [ebx+ecx*4+0x1000], eax
pop ebx eax
ret
;v86_set_page:
; push eax ebx
; mov ebx, [esi+V86_machine.pagedir]
; mov [ebx+ecx*4+0x1800], eax
; call get_pg_addr
; or al, 111b
; mov [ebx+ecx*4+0x1000], eax
; pop ebx eax
; ret
; Allocate memory in V86 machine
; in: eax=size (in bytes)
@@ -214,21 +211,7 @@ init_sys_v86:
mov [sys_v86_machine], eax
test eax, eax
jz .ret
mov byte [OS_BASE + 0x500], 0xCD
mov byte [OS_BASE + 0x501], 0x13
mov byte [OS_BASE + 0x502], 0xF4
mov byte [OS_BASE + 0x503], 0xCD
mov byte [OS_BASE + 0x504], 0x10
mov byte [OS_BASE + 0x505], 0xF4
mov esi, eax
mov ebx, [eax+V86_machine.pagedir]
; one page for stack, two pages for results (0x2000 bytes = 16 sectors)
mov dword [ebx+0x99*4+0x1000], 0x99000 or 111b
mov dword [ebx+0x99*4+0x1800], OS_BASE + 0x99000
mov dword [ebx+0x9A*4+0x1000], 0x9A000 or 111b
mov dword [ebx+0x9A*4+0x1800], OS_BASE + 0x9A000
mov dword [ebx+0x9B*4+0x1000], 0x9B000 or 111b
mov dword [ebx+0x9B*4+0x1800], OS_BASE + 0x9B000
if ~DEBUG_SHOW_IO
; allow access to all ports
mov ecx, [esi+V86_machine.iopm]
@@ -272,36 +255,38 @@ ends
; eax = 3 - IRQ is already hooked by another VM
; destroys: nothing
v86_start:
pushad
cli
mov ecx, [CURRENT_TASK]
shl ecx, 8
add ecx, SLOT_BASE
mov ecx, [current_slot]
mov eax, [esi+V86_machine.iopm]
call get_pg_addr
inc eax
push dword [ecx+APPDATA.io_map]
push dword [ecx+APPDATA.io_map+4]
mov dword [ecx+APPDATA.io_map], eax
mov dword [page_tabs + (tss._io_map_0 shr 10)], eax
add eax, 0x1000
mov dword [ecx+APPDATA.io_map+4], eax
mov dword [page_tabs + (tss._io_map_1 shr 10)], eax
push [ecx+APPDATA.dir_table]
push [ecx+APPDATA.process]
push [ecx+APPDATA.saved_esp0]
mov [ecx+APPDATA.saved_esp0], esp
mov [tss._esp0], esp
mov eax, [esi+V86_machine.pagedir]
mov eax, [esi+V86_machine.iopm]
call get_pg_addr
mov [ecx+APPDATA.dir_table], eax
mov cr3, eax
inc eax
mov dword [ecx+APPDATA.io_map], eax
mov dword [page_tabs + (tss._io_map_0 shr 10)], eax
; mov [irq_tab+5*4], my05
mov eax, [esi+V86_machine.iopm]
add eax, 0x1000
call get_pg_addr
inc eax
mov dword [ecx+APPDATA.io_map+4], eax
mov dword [page_tabs + (tss._io_map_1 shr 10)], eax
mov eax, [esi+V86_machine.process]
mov [ecx+APPDATA.process], eax
mov [current_process], eax
mov eax, [eax+PROC.pdt_0_phys]
mov cr3, eax
; We do not enable interrupts, because V86 IRQ redirector assumes that
; machine is running
@@ -782,19 +767,21 @@ end if
mov esp, esi
cli
mov ecx, [CURRENT_TASK]
shl ecx, 8
mov ecx, [current_slot]
pop eax
mov [SLOT_BASE+ecx+APPDATA.saved_esp0], eax
mov [ecx+APPDATA.saved_esp0], eax
mov [tss._esp0], eax
pop eax
mov [SLOT_BASE+ecx+APPDATA.dir_table], eax
mov [ecx+APPDATA.process], eax
mov [current_process], eax
pop ebx
mov dword [SLOT_BASE+ecx+APPDATA.io_map+4], ebx
mov dword [ecx+APPDATA.io_map+4], ebx
mov dword [page_tabs + (tss._io_map_1 shr 10)], ebx
pop ebx
mov dword [SLOT_BASE+ecx+APPDATA.io_map], ebx
mov dword [ecx+APPDATA.io_map], ebx
mov dword [page_tabs + (tss._io_map_0 shr 10)], ebx
mov eax, [eax+PROC.pdt_0_phys]
mov cr3, eax
sti
@@ -843,11 +830,10 @@ v86_irq:
pop eax
v86_irq2:
mov esi, [v86_irqhooks+edi*8] ; get VM handle
mov eax, [esi+V86_machine.pagedir]
call get_pg_addr
mov eax, [esi+V86_machine.process]
mov ecx, [CURRENT_TASK]
shl ecx, 8
cmp [SLOT_BASE+ecx+APPDATA.dir_table], eax
cmp [SLOT_BASE+ecx+APPDATA.process], eax
jnz .notcurrent
lea eax, [edi+8]
cmp al, 10h
@@ -860,7 +846,7 @@ v86_irq2:
mov ebx, SLOT_BASE + 0x100
mov ecx, [TASK_COUNT]
.scan:
cmp [ebx+APPDATA.dir_table], eax
cmp [ebx+APPDATA.process], eax
jnz .cont
push ecx
mov ecx, [ebx+APPDATA.saved_esp0]
@@ -895,6 +881,7 @@ v86_irq2:
popad
iretd
.found:
mov eax, [eax+PROC.pdt_0_phys]
mov cr3, eax
mov esi, [ebx+APPDATA.saved_esp0]
sub word [esi-sizeof.v86_regs+v86_regs.esp], 6