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1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // e32\nkern\x86\ncthrd.cia |
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15 // |
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16 // |
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17 |
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18 #include <x86.h> |
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19 |
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20 const TLinAddr NKern_Exit = (TLinAddr)NKern::Exit; |
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21 const TLinAddr NKern_Lock = (TLinAddr)NKern::Lock; |
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22 |
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23 // Called by a thread when it first runs |
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24 __NAKED__ void __StartThread() |
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25 { |
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26 // On entry edi=entry point, esi=parameter block |
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27 asm("sti"); |
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28 asm("mov ax, ss"); |
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29 asm("mov ds, ax"); |
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30 asm("mov es, ax"); |
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31 asm("push esi"); |
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32 asm("call edi"); |
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33 asm("add esp, 4"); |
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34 asm("call %a0" : : "i"(NKern_Exit)); |
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35 } |
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36 |
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37 |
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38 // Called by a thread which has been forced to exit |
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39 // Interrupts off here, kernel unlocked |
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40 __NAKED__ void __DoForcedExit() |
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41 { |
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42 asm("sti"); |
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43 asm("call %a0" : : "i"(NKern_Lock)); |
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44 asm("mov ecx, [%a0]" : : "i"(&TheScheduler.iCurrentThread)); |
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45 asm("mov dword ptr [ecx+%0], 0" : : "i"_FOFF(NThreadBase,iCsCount)); |
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46 #ifdef __GCC32__ |
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47 asm("push ecx"); |
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48 asm("call __ZN11NThreadBase4ExitEv"); |
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49 asm("pop ecx"); |
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50 #else |
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51 TheScheduler.iCurrentThread->Exit(); |
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52 #endif |
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53 } |
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54 |
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55 |
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56 |
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57 __NAKED__ TUint32 X86::GetCR0() |
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58 { |
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59 asm("mov eax, cr0"); |
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60 asm("ret"); |
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61 } |
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62 |
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63 __NAKED__ void X86::SetCR0(TUint32) |
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64 { |
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65 asm("mov eax, [esp+4]"); |
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66 asm("mov cr0, eax"); |
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67 asm("ret"); |
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68 } |
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69 |
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70 __NAKED__ TUint32 X86::ModifyCR0(TUint32 /*clear*/, TUint32 /*set*/) |
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71 { |
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72 asm("mov ecx, [esp+4]"); |
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73 asm("mov edx, [esp+8]"); |
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74 asm("mov eax, cr0"); |
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75 asm("not ecx"); |
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76 asm("and ecx, eax"); |
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77 asm("or ecx, edx"); |
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78 asm("mov cr0, ecx"); |
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79 asm("ret"); |
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80 } |
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81 |