aabc2/KOS_qrcodes
1
0
Fork 0
forked from KolibriOS/kolibrios
Code Pull Requests Activity

1)fixed bug with wrong lfb size on some old videocards

Browse Source 
2)set fpu/sse to default state for new thread
3)added driver sceletone

git-svn-id: svn://kolibrios.org@214 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge)
2006-11-20 07:06:00 +00:00
parent 44a74d9138
commit 00b8fb388c
18 changed files with 1236 additions and 355 deletions
Download Patch File Download Diff File Expand all files Collapse all files

223
kernel/trunk/core/fpu.inc Normal file
View File

@@ -0,0 +1,223 @@
init_fpu:
clts
fninit
bt [cpu_caps], CAPS_FXSR
jnc .no_FXSR
stdcall kernel_alloc, 512*256
mov [fpu_data], eax
mov ebx, cr4
mov ecx, cr0
or ebx, CR4_OSFXSR+CR4_OSXMMEXPT
mov cr4, ebx
and ecx, not (CR0_MP+CR0_EM)
or ecx, CR0_NE
mov cr0, ecx
mov dword [esp-4], SSE_INIT
ldmxcsr [esp-4]
xorps xmm0, xmm0
xorps xmm1, xmm1
xorps xmm2, xmm2
xorps xmm3, xmm3
xorps xmm4, xmm4
xorps xmm5, xmm5
xorps xmm6, xmm6
xorps xmm7, xmm7
fxsave [eax]
ret
.no_FXSR:
stdcall kernel_alloc, 112*256
mov [fpu_data], eax
mov ecx, cr0
and ecx, not CR0_EM
or ecx, CR0_MP+CR0_NE
mov cr0, ecx
fnsave [eax]
ret
align 4
proc fpu_save
clts
mov ebx, [fpu_owner]
shl ebx, 8
mov eax, [ebx+PROC_BASE+0x10]
mov ebx, [CURRENT_TASK]
mov [fpu_owner], ebx
bt [cpu_caps], CAPS_FXSR
jnc .no_SSE
fxsave [eax]
fninit ;re-init fpu
ret
.no_SSE:
fnsave [eax]
ret
endp
align 4
proc fpu_restore
mov ebx, [CURRENT_TASK]
shl ebx, 8
mov eax, [ebx+PROC_BASE+0x10]
bt [cpu_caps], CAPS_FXSR
jnc .no_SSE
fxrstor [eax]
ret
.no_SSE:
fnclex ;fix possible problems
frstor [eax]
ret
endp
align 4
e7: ;#NM exception handler
save_ring3_context
clts
mov ax, os_data
mov ds, ax
mov es, ax
mov ebx, [fpu_owner]
cmp ebx, [CURRENT_TASK]
je .exit
shl ebx, 8
mov eax, [ebx+PROC_BASE+APPDATA.fpu_state]
bt [cpu_caps], CAPS_FXSR
jnc .no_SSE
fxsave [eax]
mov ebx, [CURRENT_TASK]
mov [fpu_owner], ebx
shl ebx, 8
mov eax, [ebx+PROC_BASE+APPDATA.fpu_state]
fxrstor [eax]
.exit:
restore_ring3_context
iret
.no_SSE:
fnsave [eax]
mov ebx, [CURRENT_TASK]
mov [fpu_owner], ebx
shl ebx, 8
mov eax, [ebx+PROC_BASE+APPDATA.fpu_state]
frstor [eax]
restore_ring3_context
iret
iglobal
fpu_owner dd 1
endg
reg_eip equ ebp+4
reg_cs equ ebp+8
reg_eflags equ ebp+12
reg_esp equ ebp+16
reg_ss equ ebp+20
align 4
except_16: ;fpu native exceptions handler
push ebp
mov ebp, esp
push eax
push ebx
push ecx
push edx
mov ebx, [ss:CURRENT_TASK]
shl ebx, 8
mov eax, [ss:ebx+PROC_BASE+APPDATA.fpu_handler]
test eax, eax
jz .default
mov ecx, [reg_eip]
mov edx, [reg_esp]
sub edx, 4
mov [ss:edx+new_app_base], ecx
mov [reg_esp], edx
mov dword [reg_eip], eax
pop edx
pop ecx
pop ebx
pop eax
leave
iretd
.default:
pop edx
pop ecx
pop ebx
pop eax
leave
save_ring3_context ;debugger support
mov bl, 16
jmp exc_c
align 4
except_19: ;sse exceptions handler
push ebp
mov ebp, esp
push eax
push ebx
push ecx
push edx
mov ebx, [ss:CURRENT_TASK]
shl ebx, 8
mov eax, [ss:ebx+PROC_BASE+APPDATA.sse_handler]
test eax, eax
jz .default
mov ecx, [reg_eip]
mov edx, [reg_esp]
sub edx, 4
mov [ss:edx+new_app_base], ecx
mov [reg_esp], edx
mov dword [reg_eip], eax
pop edx
pop ecx
pop ebx
pop eax
leave
iretd
.default:
pop edx
pop ecx
pop ebx
pop eax
leave
save_ring3_context ;debugger support
mov bl, 19
jmp exc_c
restore reg_eip
restore reg_cs
restore reg_eflags
restore reg_esp
restore reg_ss