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software task switch (experimental, disabled IDE DMA, io permission

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git-svn-id: svn://kolibrios.org@420 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2007-03-19 06:28:05 +00:00
parent 5f84f102c5
commit b1101aa868
13 changed files with 252 additions and 153 deletions
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48
kernel/branches/flat_kernel/kernel.asm
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@@ -19,7 +19,7 @@ max_processes equ 255
tss_step equ (128+8192) ; tss & i/o - 65535 ports, * 256=557056*4
os_data equ os_data_l-gdts ; GDTs
os_stack equ os_data_l-gdts ; GDTs
os_code equ os_code_l-gdts
graph_data equ 3+graph_data_l-gdts
tss0 equ tss0_l-gdts
@@ -151,7 +151,7 @@ org $+0x10000
align 4
B32:
mov ax,os_data ; Selector for os
mov ax,os_stack ; Selector for os
mov ds,ax
mov es,ax
mov fs,ax
@@ -214,14 +214,16 @@ org OS_BASE+$
align 4
high_code:
mov ax,os_data
mov ds,ax
mov es,ax
mov fs,ax
mov gs,ax
mov ax,os_stack
mov bx,app_data
mov ss,ax
add esp, OS_BASE
mov ds,bx
mov es,bx
mov fs,bx
mov gs,bx
mov dword [sys_pgdir], 0
mov dword [sys_pgdir+4], 0
mov dword [sys_pgdir+8], 0
@@ -369,7 +371,9 @@ high_code:
call init_kernel_heap
stdcall kernel_alloc, 0x2000
mov [os_stack], eax
mov [os_stack_seg], eax
lea esp, [eax+RING0_STACK_SIZE]
mov [LFBSize], 0x800000
call init_mtrr
@@ -552,7 +556,7 @@ include 'vmodeld.inc'
mov dword [SLOT_BASE+256+APPDATA.app_name], dword 'OS/I'
mov dword [SLOT_BASE+256+APPDATA.app_name+4], dword 'DLE '
mov edi, [os_stack]
mov edi, [os_stack_seg]
mov dword [SLOT_BASE+256+APPDATA.pl0_stack], edi
add edi, 0x2000-512
mov dword [SLOT_BASE+256+APPDATA.fpu_state], edi
@@ -583,21 +587,21 @@ include 'vmodeld.inc'
cld
rep stosd
mov edi,tss_data+tss_step
mov [edi+TSS._ss0], os_data
mov edi,tss_data
mov [edi+TSS._ss0], os_stack
mov eax,cr3
mov [edi+TSS._cr3],eax
mov [edi+TSS._eip],osloop
mov [edi+TSS._eflags],dword 0x11202 ; sti and resume
mov eax, [os_stack]
mov [edi+TSS._eflags],dword 0x1202 ; sti and resume
mov eax, [os_stack_seg]
add eax, 0x2000-512
mov [edi+TSS._esp], eax
mov [edi+TSS._cs],os_code
mov [edi+TSS._ss],os_data
mov [edi+TSS._ds],os_data
mov [edi+TSS._es],os_data
mov [edi+TSS._fs],os_data
mov [edi+TSS._gs],os_data
mov [edi+TSS._ss],os_stack ;os_stack
mov [edi+TSS._ds],app_data ;os_data
mov [edi+TSS._es],app_data ;os_data
mov [edi+TSS._fs],app_data ;os_data
mov [edi+TSS._gs],app_data ;os_data
mov ax,tss0
ltr ax
@@ -717,7 +721,7 @@ first_app_found:
mov esi,boot_tasking
call boot_log
; mov [ENABLE_TASKSWITCH],byte 1 ; multitasking enabled
; mov [ENABLE_TASKSWITCH],byte 1 ; multitasking enabled
; UNMASK ALL IRQ'S
@@ -743,11 +747,15 @@ first_app_found:
; mov [dma_hdd],1
cmp [IDEContrRegsBaseAddr], 0
setnz [dma_hdd]
; setnz [dma_hdd]
stdcall init_uart_service, DRV_ENTRY
sti
call change_task
jmp osloop
jmp $ ; wait here for timer to take control
; Fly :)