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1 // Copyright (c) 2008-2009 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\nkernsmp\arm\nk_entry.cia |
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15 // |
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16 // |
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17 |
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18 #include <e32cia.h> |
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19 #include <arm.h> |
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20 #include "nk_priv.h" |
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21 |
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22 #include "entry.h" |
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23 |
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24 #ifndef EKA2_ENTRY_POINT_VERSION_IDENTIFIER |
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25 #define EKA2_ENTRY_POINT_VERSION_IDENTIFIER \ |
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26 asm("tst pc, #%a0" : : "i" ((TInt)0) ) |
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27 #endif |
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28 |
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29 extern "C" { |
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30 |
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31 extern void HwInit0(); |
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32 extern void KernelMain(); |
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33 extern TLinAddr RomHeaderAddress; |
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34 extern TLinAddr SuperPageAddress; |
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35 |
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36 /* |
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37 * The main startup program |
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38 * aRomHeader is address of ROM header passed in by bootstrap |
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39 * aSuperPage is address of super page passed in by bootstrap |
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40 * |
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41 * *** NOTE *** |
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42 * This is written in assembler in order that nk_exe.lib can be built entirely |
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43 * from one source file. This is necessary to ensure that the vector table above |
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44 * appears at the very beginning of the ekern.exe code section. |
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45 * ************ |
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46 */ |
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47 #if defined(__GCC32__) |
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48 GLDEF_C __NAKED__ void _E32Startup(TLinAddr /*aRomHeader*/, TLinAddr /*aSuperPage*/) |
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49 { |
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50 EKA2_ENTRY_POINT_VERSION_IDENTIFIER; // DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT |
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51 asm("ldr r2, __RomHeaderAddress "); |
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52 asm("b 1f "); // branch over space for unique ID |
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53 |
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54 asm(".word 0 "); // loader will replace with code seg unique ID |
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55 // for RAM-loaded code segment |
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56 // MUST BE AT OFFSET 12 FROM ENTRY POINT |
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57 |
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58 asm("1: "); |
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59 asm("ldr r3, __SuperPage "); |
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60 asm("str r0, [r2] "); |
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61 asm("str r1, [r3] "); |
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62 |
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63 #ifdef __CPU_HAS_CP15_THREAD_ID_REG |
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64 asm("mov r0, #0 "); |
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65 SET_RWNO_TID(,r0); // initialise SubScheduler() pointer to 0 |
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66 SET_RWRO_TID(,r0); |
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67 SET_RWRW_TID(,r0); |
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68 #endif |
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69 |
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70 asm("bl HwInit0 "); |
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71 |
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72 asm("ldr r4, __CtorList "); |
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73 |
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74 asm("1: "); |
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75 asm("ldr r0, [r4, #4]! "); |
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76 asm("adr lr, 1b "); |
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77 asm("cmp r0, #0 "); |
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78 asm("mrs r1, cpsr "); |
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79 ASM_DEBUG2(GlobalCtor,r0,r1); |
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80 __JUMP(ne,r0); |
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81 |
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82 asm("b KernelMain "); |
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83 |
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84 asm("__RomHeaderAddress: "); |
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85 asm(".word RomHeaderAddress "); |
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86 asm("__SuperPage: "); |
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87 asm(".word SuperPageAddress "); |
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88 asm("__CtorList: "); |
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89 asm(".word __CTOR_LIST__ "); |
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90 } |
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91 #elif defined(__ARMCC__) |
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92 void __DLL_Export_Table__(void); |
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93 void __cpp_initialize__aeabi_(); |
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94 |
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95 // The compiler generates calls to this when it reckons a top-level construction |
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96 // needs destruction. But the kernel never will need this so, define it as a nop |
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97 void __record_needed_destruction (void * d){} |
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98 // 2.1 calls __aeabi_atexit passing __dso_handle. This can be a dummy (i.e. just a label) |
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99 |
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100 __asm void __dso_handle(void) {} |
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101 void __aeabi_atexit(void *object, void (*dtor)(void *), void *handle){} |
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102 |
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103 void _E32Startup_Body(TLinAddr aRomHeader, TLinAddr aSuperPage); |
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104 |
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105 __NAKED__ void _E32Startup(TLinAddr aRomHeader, TLinAddr aSuperPage) |
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106 { |
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107 EKA2_ENTRY_POINT_VERSION_IDENTIFIER; // DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT |
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108 asm("b 1f "); |
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109 asm(".word 0 "); // padding |
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110 |
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111 asm(".word 0 "); // loader will replace with code seg unique ID |
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112 // for RAM-loaded code segment |
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113 // MUST BE AT OFFSET 12 FROM ENTRY POINT |
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114 asm("1: "); |
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115 #ifdef __CPU_HAS_CP15_THREAD_ID_REG |
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116 asm("mov r12, #0 "); |
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117 SET_RWNO_TID(,r12); // initialise SubScheduler() pointer to 0 |
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118 SET_RWRO_TID(,r12); |
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119 SET_RWRW_TID(,r12); |
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120 #endif |
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121 asm("mov r12, #0 "); |
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122 SET_RWNO_TID(,r12); // initialise SubScheduler() pointer to 0 |
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123 asm("b _E32Startup_Body "); |
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124 |
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125 } |
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126 |
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127 GLDEF_C void _E32Startup_Body(TLinAddr aRomHeader, TLinAddr aSuperPage) |
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128 { |
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129 RomHeaderAddress = aRomHeader; |
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130 SuperPageAddress = aSuperPage; |
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131 HwInit0(); |
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132 |
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133 // RVCT specific initialization |
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134 |
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135 // Make sure we get an export table |
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136 __DLL_Export_Table__(); |
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137 |
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138 // Initialise static data |
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139 __cpp_initialize__aeabi_(); |
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140 |
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141 KernelMain(); |
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142 } |
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143 #else |
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144 #error Not supported |
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145 #endif |
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146 |
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147 } |
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148 |