1 | /* |
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2 | * PreP compliant NVRAM access |
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3 | * |
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4 | * This file can be found in motorla or IBP PPC site. |
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5 | */ |
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6 | |
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7 | #ifndef _PPC_NVRAM_H |
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8 | #define _PPC_NVRAM_H |
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9 | |
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10 | #define NVRAM_AS0 0x74 |
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11 | #define NVRAM_AS1 0x75 |
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12 | #define NVRAM_DATA 0x77 |
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13 | |
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14 | /* RTC Offsets */ |
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15 | |
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16 | #define MOTO_RTC_SECONDS 0x1FF9 |
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17 | #define MOTO_RTC_MINUTES 0x1FFA |
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18 | #define MOTO_RTC_HOURS 0x1FFB |
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19 | #define MOTO_RTC_DAY_OF_WEEK 0x1FFC |
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20 | #define MOTO_RTC_DAY_OF_MONTH 0x1FFD |
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21 | #define MOTO_RTC_MONTH 0x1FFE |
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22 | #define MOTO_RTC_YEAR 0x1FFF |
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23 | #define MOTO_RTC_CONTROLA 0x1FF8 |
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24 | #define MOTO_RTC_CONTROLB 0x1FF9 |
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25 | |
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26 | #ifndef BCD_TO_BIN |
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27 | #define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10) |
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28 | #endif |
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29 | |
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30 | #ifndef BIN_TO_BCD |
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31 | #define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10) |
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32 | #endif |
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33 | |
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34 | /* Structure map for NVRAM on PowerPC Reference Platform */ |
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35 | /* All fields are either character/byte strings which are valid either |
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36 | endian or they are big-endian numbers. |
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37 | |
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38 | There are a number of Date and Time fields which are in RTC format, |
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39 | big-endian. These are stored in UT (GMT). |
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40 | |
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41 | For enum's: if given in hex then they are bit significant, i.e. only |
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42 | one bit is on for each enum. |
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43 | */ |
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44 | |
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45 | #define NVSIZE 4096 /* size of NVRAM */ |
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46 | #define OSAREASIZE 512 /* size of OSArea space */ |
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47 | #define CONFSIZE 1024 /* guess at size of Configuration space */ |
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48 | |
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49 | #ifndef ASM |
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50 | |
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51 | typedef struct _SECURITY { |
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52 | unsigned long BootErrCnt; /* Count of boot password errors */ |
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53 | unsigned long ConfigErrCnt; /* Count of config password errors */ |
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54 | unsigned long BootErrorDT[2]; /* Date&Time from RTC of last error in pw */ |
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55 | unsigned long ConfigErrorDT[2]; /* Date&Time from RTC of last error in pw */ |
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56 | unsigned long BootCorrectDT[2]; /* Date&Time from RTC of last correct pw */ |
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57 | unsigned long ConfigCorrectDT[2]; /* Date&Time from RTC of last correct pw */ |
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58 | unsigned long BootSetDT[2]; /* Date&Time from RTC of last set of pw */ |
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59 | unsigned long ConfigSetDT[2]; /* Date&Time from RTC of last set of pw */ |
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60 | unsigned char Serial[16]; /* Box serial number */ |
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61 | } SECURITY; |
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62 | |
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63 | typedef enum _OS_ID { |
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64 | Unknown = 0, |
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65 | Firmware = 1, |
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66 | AIX = 2, |
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67 | NT = 3, |
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68 | MKOS2 = 4, |
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69 | MKAIX = 5, |
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70 | Taligent = 6, |
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71 | Solaris = 7, |
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72 | MK = 12 |
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73 | } OS_ID; |
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74 | |
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75 | typedef struct _ERROR_LOG { |
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76 | unsigned char ErrorLogEntry[40]; /* To be architected */ |
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77 | } ERROR_LOG; |
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78 | |
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79 | typedef enum _BOOT_STATUS { |
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80 | BootStarted = 0x01, |
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81 | BootFinished = 0x02, |
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82 | RestartStarted = 0x04, |
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83 | RestartFinished = 0x08, |
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84 | PowerFailStarted = 0x10, |
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85 | PowerFailFinished = 0x20, |
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86 | ProcessorReady = 0x40, |
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87 | ProcessorRunning = 0x80, |
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88 | ProcessorStart = 0x0100 |
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89 | } BOOT_STATUS; |
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90 | |
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91 | typedef struct _RESTART_BLOCK { |
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92 | unsigned short Version; |
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93 | unsigned short Revision; |
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94 | unsigned long ResumeReserve1[2]; |
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95 | volatile unsigned long BootStatus; |
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96 | unsigned long CheckSum; /* Checksum of RESTART_BLOCK */ |
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97 | void* RestartAddress; |
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98 | void* SaveAreaAddr; |
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99 | unsigned long SaveAreaLength; |
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100 | } RESTART_BLOCK; |
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101 | |
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102 | typedef enum _OSAREA_USAGE { |
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103 | Empty = 0, |
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104 | Used = 1 |
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105 | } OSAREA_USAGE; |
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106 | |
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107 | typedef enum _PM_MODE { |
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108 | Suspend = 0x80, /* Part of state is in memory */ |
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109 | Normal = 0x00 /* No power management in effect */ |
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110 | } PMMode; |
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111 | |
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112 | typedef struct _HEADER { |
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113 | unsigned short Size; /* NVRAM size in K(1024) */ |
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114 | unsigned char Version; /* Structure map different */ |
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115 | unsigned char Revision; /* Structure map the same -may |
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116 | be new values in old fields |
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117 | in other words old code still works */ |
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118 | unsigned short Crc1; /* check sum from beginning of nvram to OSArea */ |
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119 | unsigned short Crc2; /* check sum of config */ |
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120 | unsigned char LastOS; /* OS_ID */ |
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121 | unsigned char Endian; /* B if big endian, L if little endian */ |
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122 | unsigned char OSAreaUsage;/* OSAREA_USAGE */ |
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123 | unsigned char PMMode; /* Shutdown mode */ |
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124 | RESTART_BLOCK RestartBlock; |
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125 | SECURITY Security; |
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126 | ERROR_LOG ErrorLog[2]; |
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127 | |
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128 | /* Global Environment information */ |
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129 | void* GEAddress; |
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130 | unsigned long GELength; |
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131 | |
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132 | /* Date&Time from RTC of last change to Global Environment */ |
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133 | unsigned long GELastWriteDT[2]; |
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134 | |
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135 | /* Configuration information */ |
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136 | void* ConfigAddress; |
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137 | unsigned long ConfigLength; |
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138 | |
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139 | /* Date&Time from RTC of last change to Configuration */ |
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140 | unsigned long ConfigLastWriteDT[2]; |
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141 | unsigned long ConfigCount; /* Count of entries in Configuration */ |
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142 | |
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143 | /* OS dependent temp area */ |
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144 | void* OSAreaAddress; |
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145 | unsigned long OSAreaLength; |
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146 | |
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147 | /* Date&Time from RTC of last change to OSArea */ |
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148 | unsigned long OSAreaLastWriteDT[2]; |
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149 | } HEADER; |
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150 | |
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151 | /* Here is the whole map of the NVRAM */ |
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152 | typedef struct _NVRAM_MAP { |
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153 | HEADER Header; |
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154 | unsigned char GEArea[NVSIZE-CONFSIZE-OSAREASIZE-sizeof(HEADER)]; |
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155 | unsigned char OSArea[OSAREASIZE]; |
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156 | unsigned char ConfigArea[CONFSIZE]; |
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157 | } NVRAM_MAP; |
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158 | |
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159 | /* Routines to manipulate the NVRAM */ |
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160 | void init_prep_nvram(void); |
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161 | char *prep_nvram_get_var(const char *name); |
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162 | char *prep_nvram_first_var(void); |
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163 | char *prep_nvram_next_var(char *name); |
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164 | |
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165 | #endif /* ASM */ |
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166 | |
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167 | #endif /* _PPC_NVRAM_H */ |
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