FreeCalypso > hg > fc-tourmaline
annotate src/cs/drivers/drv_app/ffs/board/amdsbdrv.c @ 303:f76436d19a7a default tip
!GPRS config: fix long-standing AT+COPS chance hanging bug
There has been a long-standing bug in FreeCalypso going back years:
sometimes in the AT command bring-up sequence of an ACI-only MS,
the AT+COPS command would produce only a power scan followed by
cessation of protocol stack activity (only L1 ADC traces), instead
of the expected network search sequence. This behaviour was seen
in different FC firmware versions going back to Citrine, and seemed
to follow some law of chance, not reliably repeatable.
This bug has been tracked down and found to be specific to !GPRS
configuration, stemming from our TCS2/TCS3 hybrid and reconstruction
of !GPRS support that was bitrotten in TCS3.2/LoCosto version.
ACI module psa_mms.c, needed only for !GPRS, was missing in the TCS3
version and had to be pulled from TCS2 - but as it turns out,
there is a new field in the MMR_REG_REQ primitive that needs to be
set correctly, and that psa_mms.c module is the place where this
initialization needed to be added.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 08 Jun 2023 08:23:37 +0000 |
parents | 4e78acac3d88 |
children |
rev | line source |
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0
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1 /****************************************************************************** |
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2 * Flash File System (ffs) |
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3 * Idea, design and coding by Mads Meisner-Jensen, mmj@ti.com |
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4 * |
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5 * FFS AMD single bank low level flash driver RAM code |
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6 * |
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7 * $Id: amdsbdrv.c 1.5.1.3 Tue, 06 Jan 2004 10:57:45 +0100 tsj $ |
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8 * |
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9 ******************************************************************************/ |
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10 |
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11 #include "ffs.cfg" |
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12 |
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13 #include "ffs/ffs.h" |
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14 #include "ffs/board/drv.h" |
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15 #include "ffs/board/ffstrace.h" |
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16 |
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17 |
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18 // Due to long branches, we disable all tracing and led function calls. |
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19 #undef tlw |
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20 #define tlw(contents) |
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21 #undef ttw |
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22 #define ttw(contents) |
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23 |
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24 |
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25 #ifdef __GNUC__ |
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26 asm(".globl ffsdrv_ram_amd_begin"); |
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27 asm("ffsdrv_ram_amd_begin:"); |
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28 #else |
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29 asm(" .label _ffsdrv_ram_amd_begin"); |
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30 asm(" .def _ffsdrv_ram_amd_begin"); |
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31 #endif |
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32 |
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33 |
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34 // IMPORTANT! Apparently, placing the int_disable/enable() function code |
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35 // here instead of at the bottom of the file, makes the code crash or |
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36 // freeze. Reason is as of yet unknown. |
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37 |
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38 uint32 amd_int_disable(void); |
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39 void amd_int_enable(uint32 tmp); |
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40 |
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41 |
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42 /****************************************************************************** |
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43 * AMD Single Bank Driver Functions |
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44 ******************************************************************************/ |
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45 |
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46 void ffsdrv_ram_amd_sb_write_halfword(volatile uint16 *addr, uint16 value) |
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47 { |
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48 volatile char *flash = dev.base; |
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49 uint32 cpsr; |
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50 |
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51 ttw(ttr(TTrDrv, "wh(%x,%x)" NL, addr, value)); |
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52 |
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53 if (~*addr & value) { |
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54 ttw(ttr(TTrFatal, "wh(%x,%x->%x) fatal" NL, addr, *addr, value)); |
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55 return; |
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56 } |
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57 |
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58 cpsr = amd_int_disable(); |
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59 tlw(led_on(LED_WRITE)); |
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60 |
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61 flash[0xAAAA] = 0xAA; // AMD unlock cycle 1 |
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62 flash[0x5555] = 0x55; // AMD unlock cycle 2 |
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63 flash[0xAAAA] = 0xA0; |
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64 *addr = value; |
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65 |
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66 while ((*addr ^ value) & 0x80) |
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67 ; |
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68 |
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69 tlw(led_off(LED_WRITE)); |
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70 amd_int_enable(cpsr); |
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71 } |
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72 |
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73 // This VERY simple way of erase suspension only works because we run under |
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74 // a pre-emptive operating system, so whenever an interrupt occurs, another |
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75 // task takes the CPU, and at the end of the interrupt, FFS gets the CPU |
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76 // again. |
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77 void ffsdrv_ram_amd_sb_erase(uint8 block) |
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78 { |
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79 volatile char *flash = dev.base; |
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80 volatile char *addr; |
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81 uint32 cpsr; |
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82 uint16 flashpoll; |
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83 |
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84 addr = block2addr(block); |
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85 |
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86 ttw(ttr(TTrDrvEra, "e(%d)" NL, block)); |
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87 |
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88 cpsr = amd_int_disable(); |
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89 tlw(led_on(LED_ERASE)); |
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90 |
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91 flash[0xAAAA] = 0xAA; // AMD unlock cycle 1 |
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92 flash[0x5555] = 0x55; // AMD unlock cycle 2 |
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93 flash[0xAAAA] = 0x80; |
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94 flash[0xAAAA] = 0xAA; // AMD unlock cycle 1 |
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95 flash[0x5555] = 0x55; // AMD unlock cycle 2 |
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96 *addr = 0x30; // AMD erase sector command |
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97 |
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98 // Wait for erase to finish. |
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99 while ((*addr & 0x80) == 0) { |
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100 tlw(led_toggle(LED_ERASE)); |
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101 // Poll interrupts, taking interrupt mask into account. |
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102 if (INT_REQUESTED) |
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103 { |
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104 // 1. suspend erase |
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105 // 2. enable interrupts |
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106 // .. now the interrupt code executes |
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107 // 3. disable interrupts |
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108 // 4. resume erase |
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109 |
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110 tlw(led_on(LED_ERASE_SUSPEND)); |
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111 *addr = 0xB0; |
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112 |
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113 // wait for erase suspend to finish |
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114 while ((*addr & 0x80) == 0) |
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115 ; |
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116 |
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117 tlw(led_off(LED_ERASE_SUSPEND)); |
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118 amd_int_enable(cpsr); |
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119 |
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120 // Other interrupts and tasks run now... |
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121 |
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122 cpsr = amd_int_disable(); |
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123 tlw(led_on(LED_ERASE_SUSPEND)); |
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124 |
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125 // Before resuming erase we must? check if the erase is really |
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126 // suspended or if it did finish |
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127 flashpoll = *addr; |
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128 *addr = 0x30; |
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129 |
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130 tlw(led_off(LED_ERASE_SUSPEND)); |
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131 } |
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132 } |
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133 |
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134 tlw(led_on(LED_ERASE)); |
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135 tlw(led_off(LED_ERASE)); |
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136 amd_int_enable(cpsr); |
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137 } |
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138 |
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139 |
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140 /****************************************************************************** |
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141 * Interrupt Enable/Disable |
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142 ******************************************************************************/ |
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143 |
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144 #ifdef __GNUC__ |
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145 #define NOINLINE __attribute__ ((noinline)) |
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146 #else |
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147 #define NOINLINE |
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148 #endif |
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149 |
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150 uint32 NOINLINE amd_int_disable(void) |
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151 { |
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152 #ifdef __GNUC__ |
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153 asm(" .code 16"); |
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154 #else |
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155 asm(" .state16"); |
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156 #endif |
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157 asm(" mov A1, #0xC0"); |
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158 asm(" ldr A2, tct_amd_disable"); |
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Mychaela Falconia <falcon@freecalypso.org>
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159 asm(" bx A2 "); |
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160 |
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161 #ifdef __GNUC__ |
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162 asm(".balign 4"); |
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163 asm("tct_amd_disable:"); |
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164 asm(" .word TCT_Control_Interrupts"); |
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165 #else |
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166 asm("tct_amd_disable .field _TCT_Control_Interrupts+0,32"); |
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167 asm(" .global _TCT_Control_Interrupts"); |
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Mychaela Falconia <falcon@freecalypso.org>
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168 #endif |
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|
169 } |
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170 |
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171 void NOINLINE amd_int_enable(uint32 cpsr) |
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172 { |
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173 #ifdef __GNUC__ |
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174 asm(" .code 16"); |
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175 #else |
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176 asm(" .state16"); |
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Mychaela Falconia <falcon@freecalypso.org>
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177 #endif |
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178 asm(" ldr A2, tct_amd_enable"); |
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Mychaela Falconia <falcon@freecalypso.org>
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179 asm(" bx A2 "); |
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180 |
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181 #ifdef __GNUC__ |
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182 asm(".balign 4"); |
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183 asm("tct_amd_enable:"); |
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184 asm(" .word TCT_Control_Interrupts"); |
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Mychaela Falconia <falcon@freecalypso.org>
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185 #else |
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186 asm("tct_amd_enable .field _TCT_Control_Interrupts+0,32"); |
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Mychaela Falconia <falcon@freecalypso.org>
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187 asm(" .global _TCT_Control_Interrupts"); |
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Mychaela Falconia <falcon@freecalypso.org>
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188 #endif |
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|
189 } |
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190 |
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Mychaela Falconia <falcon@freecalypso.org>
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191 // Even though we have this end label, we cannot determine the number of |
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Mychaela Falconia <falcon@freecalypso.org>
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192 // constant/PC-relative data following the code! |
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Mychaela Falconia <falcon@freecalypso.org>
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193 #ifdef __GNUC__ |
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194 asm(".globl ffsdrv_ram_amd_end"); |
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195 asm("ffsdrv_ram_amd_end:"); |
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Mychaela Falconia <falcon@freecalypso.org>
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196 #else |
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197 asm(" .state32"); |
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198 asm(" .label _ffsdrv_ram_amd_end"); |
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199 asm(" .def _ffsdrv_ram_amd_end"); |
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Mychaela Falconia <falcon@freecalypso.org>
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200 #endif |