1 | /* |
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2 | * This routine does the bulk of the system initialization. |
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3 | */ |
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4 | |
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5 | /* |
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6 | * COPYRIGHT (c) 1989-1998. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.OARcorp.com/rtems/license.html. |
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12 | * |
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13 | * Modified to support the MCP750. |
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14 | * Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr |
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15 | * |
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16 | * Modified to support the Synergy VGM & Motorola PowerPC boards. |
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17 | * (C) by Till Straumann, <strauman@slac.stanford.edu>, 2002, 2004, 2005 |
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18 | * |
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19 | * Modified to support the mvme5500 BSP |
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20 | * (C) by Kate Feng <feng1@bnl.gov>, 2003, 2004 |
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21 | * under the contract DE-AC02-98CH10886 with the Deaprtment of Energy |
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22 | * |
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23 | * T. Straumann: 2005-2007; stolen again for 'beatnik'... |
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24 | */ |
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25 | #include <string.h> |
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26 | #include <stdlib.h> |
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27 | #include <ctype.h> |
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28 | |
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29 | #include <rtems/system.h> |
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30 | #include <rtems/libio.h> |
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31 | #include <rtems/libcsupport.h> |
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32 | #include <rtems/bspIo.h> |
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33 | #include <rtems/counter.h> |
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34 | #include <rtems/powerpc/powerpc.h> |
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35 | #include <rtems/sysinit.h> |
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36 | /*#include <bsp/consoleIo.h>*/ |
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37 | #include <libcpu/spr.h> /* registers.h is included here */ |
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38 | #include <bsp.h> |
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39 | #include <bsp/bootcard.h> |
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40 | #include <bsp/uart.h> |
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41 | #include <bsp/pci.h> |
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42 | #include <bsp/gtreg.h> |
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43 | #include <bsp/gt_timer.h> |
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44 | #include <libcpu/bat.h> |
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45 | #include <libcpu/pte121.h> |
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46 | #include <libcpu/cpuIdent.h> |
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47 | #include <bsp/vectors.h> |
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48 | #include <bsp/VME.h> |
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49 | #include <bsp/vpd.h> |
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50 | |
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51 | #define SHOW_MORE_INIT_SETTINGS |
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52 | |
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53 | BSP_output_char_function_type BSP_output_char = BSP_output_char_via_serial; |
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54 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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55 | |
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56 | extern Triv121PgTbl BSP_pgtbl_setup(unsigned int *); |
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57 | extern void BSP_pgtbl_activate(Triv121PgTbl); |
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58 | extern void BSP_motload_pci_fixup(void); |
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59 | |
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60 | extern unsigned long __rtems_end[]; |
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61 | |
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62 | /* We really shouldn't use these since MMUoff also sets IP; |
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63 | * nevertheless, during early init I don't care for now |
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64 | */ |
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65 | extern void MMUoff(void); |
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66 | extern void MMUon(void); |
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67 | |
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68 | extern uint32_t probeMemoryEnd(void); |
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69 | |
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70 | SPR_RW(SPRG0) |
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71 | SPR_RW(SPRG1) |
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72 | SPR_RO(HID1) |
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73 | |
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74 | /* Table of PLL multipliers for 7455/7457: |
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75 | 01000 2 00010 7.5 00000 11.5 00001 17 |
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76 | 10000 3 11000 8 10111 12 00101 18 |
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77 | 10100 4 01100 8.5 11111 12.5 00111 20 |
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78 | 10110 5 01111 9 01011 13 01001 21 |
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79 | 10010 5.5 01110 9.5 11100 13.5 01101 24 |
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80 | 11010 6 10101 10 11001 14 11101 28 |
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81 | 01010 6.5 10001 10.5 00011 15 00110 bypass |
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82 | 00100 7 10011 11 11011 16 11110 off |
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83 | */ |
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84 | |
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85 | /* Sorted according to CFG bits and multiplied by 2 it looks |
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86 | * like this (note that this is in sequential order, not |
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87 | * tabulated as above) |
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88 | */ |
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89 | signed char mpc7450PllMultByTwo[32] = { |
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90 | 23, 34, 15, 30, |
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91 | 14, 36, 2/*bypass*/, 40, |
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92 | 4, 42, 13, 26, |
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93 | 17, 48, 19, 18, |
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94 | 6, 21, 11, 22, |
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95 | 8, 20, 10, 24, |
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96 | 16, 28, 12, 32, |
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97 | 27, 56, 0/*off*/, 25, |
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98 | }; |
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99 | |
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100 | uint32_t bsp_clicks_per_usec = 0; |
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101 | |
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102 | /* |
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103 | * Total memory using probing. |
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104 | */ |
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105 | unsigned int BSP_mem_size; |
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106 | |
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107 | /* |
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108 | * PCI Bus Frequency |
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109 | */ |
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110 | unsigned int BSP_bus_frequency = 0xdeadbeef; |
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111 | /* |
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112 | * processor clock frequency |
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113 | */ |
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114 | unsigned int BSP_processor_frequency = 0xdeadbeef; |
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115 | |
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116 | /* |
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117 | * Time base divisior (bus freq / TB clock) |
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118 | */ |
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119 | unsigned int BSP_time_base_divisor = 4000; /* most 604+ CPUs seem to use this */ |
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120 | |
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121 | /* Board identification string */ |
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122 | char BSP_productIdent[20] = {0}; |
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123 | char BSP_serialNumber[20] = {0}; |
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124 | |
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125 | /* VPD appends an extra char -- what for ? */ |
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126 | char BSP_enetAddr0[7] = {0}; |
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127 | char BSP_enetAddr1[7] = {0}; |
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128 | |
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129 | char *rtems_progname; |
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130 | |
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131 | #define CMDLINE_BUF_SIZE 2048 |
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132 | |
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133 | static char cmdline_buf[CMDLINE_BUF_SIZE]; |
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134 | char *BSP_commandline_string = cmdline_buf; |
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135 | |
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136 | /* this routine is called early and must be safe with a not properly |
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137 | * aligned stack |
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138 | */ |
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139 | char *save_boot_params( |
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140 | void *r3, |
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141 | void *r4, |
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142 | void *r5, |
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143 | char *cmdline_start, |
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144 | char *cmdline_end |
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145 | ) |
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146 | { |
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147 | int i=cmdline_end-cmdline_start; |
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148 | if ( i >= CMDLINE_BUF_SIZE ) |
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149 | i = CMDLINE_BUF_SIZE-1; |
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150 | else if ( i < 0 ) |
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151 | i = 0; |
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152 | memmove(cmdline_buf, cmdline_start, i); |
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153 | cmdline_buf[i]=0; |
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154 | return cmdline_buf; |
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155 | } |
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156 | |
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157 | static BSP_BoardType board_type = Unknown; |
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158 | |
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159 | BSP_BoardType |
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160 | BSP_getBoardType( void ) |
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161 | { |
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162 | return board_type; |
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163 | } |
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164 | |
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165 | /* |
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166 | * bsp_start |
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167 | * |
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168 | * This routine does the bulk of the system initialization. |
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169 | */ |
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170 | |
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171 | void bsp_start( void ) |
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172 | { |
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173 | unsigned char *stack; |
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174 | char *chpt; |
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175 | uint32_t intrStackStart; |
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176 | uint32_t intrStackSize; |
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177 | |
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178 | Triv121PgTbl pt=0; |
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179 | |
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180 | VpdBufRec vpdData [] = { |
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181 | { key: ProductIdent, instance: 0, buf: BSP_productIdent, buflen: sizeof(BSP_productIdent) - 1 }, |
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182 | { key: SerialNumber, instance: 0, buf: BSP_serialNumber, buflen: sizeof(BSP_serialNumber) - 1 }, |
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183 | { key: CpuClockHz, instance: 0, buf: &BSP_processor_frequency, buflen: sizeof(BSP_processor_frequency) }, |
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184 | { key: BusClockHz, instance: 0, buf: &BSP_bus_frequency, buflen: sizeof(BSP_bus_frequency) }, |
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185 | { key: EthernetAddr, instance: 0, buf: BSP_enetAddr0, buflen: sizeof(BSP_enetAddr0) }, |
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186 | { key: EthernetAddr, instance: 1, buf: BSP_enetAddr1, buflen: sizeof(BSP_enetAddr1) }, |
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187 | VPD_END |
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188 | }; |
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189 | |
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190 | /* T. Straumann: 4/2005 |
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191 | * |
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192 | * Need to map the system registers early, so we can printk... |
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193 | * (otherwise we silently die) |
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194 | */ |
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195 | /* map the PCI 0, 1 Domain I/O space, GT64260B registers |
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196 | * and the reserved area so that the size is the power of 2. |
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197 | */ |
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198 | setdbat(7, BSP_DEV_AND_PCI_IO_BASE, BSP_DEV_AND_PCI_IO_BASE, BSP_DEV_AND_PCI_IO_SIZE, IO_PAGE); |
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199 | |
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200 | /* Intersperse messages with actions to help locate problems */ |
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201 | printk("-----------------------------------------\n"); |
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202 | |
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203 | /* |
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204 | * Get CPU identification dynamically. Note that the get_ppc_cpu_type() & friends functions |
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205 | * store the result in global variables so that it can be used latter... |
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206 | * This also verifies that we run on a known CPU. |
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207 | */ |
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208 | get_ppc_cpu_type(); |
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209 | get_ppc_cpu_revision(); |
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210 | |
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211 | /* Make sure we detect a known host bridge */ |
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212 | BSP_getDiscoveryVersion(/* assert detection */ 1); |
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213 | |
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214 | printk("Welcome to RTEMS %s\n", _RTEMS_version ); |
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215 | |
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216 | /* Leave all caches as MotLoad left them. Seems to be fine */ |
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217 | |
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218 | /* |
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219 | * the initial stack has aready been set to this value in start.S |
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220 | * so there is no need to set it in r1 again... It is just for info |
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221 | * so that it can be printed without accessing R1. |
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222 | */ |
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223 | __asm__ volatile("mr %0, 1":"=r"(stack)); |
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224 | |
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225 | /* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */ |
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226 | |
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227 | *((uint32_t *)stack) = 0; |
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228 | |
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229 | /* |
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230 | * Initialize the interrupt related settings |
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231 | * SPRG0 = interrupt nesting level count |
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232 | * SPRG1 = software managed IRQ stack |
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233 | * |
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234 | * This could be done latter (e.g in IRQ_INIT) but it helps to understand |
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235 | * some settings below... |
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236 | */ |
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237 | intrStackStart = (uint32_t)__rtems_end; |
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238 | intrStackSize = rtems_configuration_get_interrupt_stack_size(); |
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239 | |
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240 | /* |
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241 | * Initialize default raw exception handlers. See vectors/vectors_init.c |
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242 | */ |
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243 | ppc_exc_initialize(intrStackStart, intrStackSize); |
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244 | |
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245 | printk("CPU: %s\n", get_ppc_cpu_type_name(current_ppc_cpu)); |
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246 | |
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247 | /* |
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248 | * Initialize RTEMS IRQ system |
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249 | */ |
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250 | BSP_rtems_irq_mng_init(0); |
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251 | |
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252 | BSP_vpdRetrieveFields(vpdData); |
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253 | |
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254 | if ( !strncmp(BSP_productIdent,"MVME5500",8) ) |
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255 | board_type = MVME5500; |
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256 | else if ( !strncmp(BSP_productIdent,"MVME6100",8) ) |
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257 | board_type = MVME6100; |
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258 | |
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259 | printk("Board Type: %s (S/N %s)\n", |
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260 | BSP_productIdent[0] ? BSP_productIdent : "n/a", |
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261 | BSP_serialNumber[0] ? BSP_serialNumber : "n/a"); |
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262 | |
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263 | if ( 0xdeadbeef == BSP_bus_frequency ) { |
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264 | BSP_bus_frequency = 133333333; |
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265 | printk("Bus Clock Freq NOT FOUND in VPD; using %10u Hz\n", |
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266 | BSP_bus_frequency); |
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267 | } else { |
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268 | printk("Bus Clock Freq: %10u Hz\n", |
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269 | BSP_bus_frequency); |
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270 | } |
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271 | |
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272 | if ( 0xdeadbeef == BSP_processor_frequency ) { |
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273 | BSP_processor_frequency = BSP_bus_frequency/2; |
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274 | BSP_processor_frequency *= mpc7450PllMultByTwo[ (_read_HID1() >> (31-19)) & 31 ]; |
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275 | } |
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276 | printk("CPU Clock Freq: %10u Hz\n", BSP_processor_frequency); |
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277 | |
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278 | /* probe real memory size; if it's more than 256M we can't currently access it |
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279 | * since at this point only BAT-0 maps 0..256M |
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280 | */ |
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281 | BSP_mem_size = probeMemoryEnd(); |
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282 | |
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283 | if ( (chpt = strstr(BSP_commandline_string,"MEMSZ=")) ) { |
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284 | char *endp; |
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285 | uint32_t sz; |
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286 | chpt+=6 /* strlen("MEMSZ=") */; |
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287 | sz = strtoul(chpt, &endp, 0); |
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288 | if ( endp != chpt ) |
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289 | BSP_mem_size = sz; |
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290 | } |
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291 | |
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292 | printk("Memory: %10u bytes\n", BSP_mem_size); |
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293 | |
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294 | if ( BSP_mem_size > 0x10000000 ) { |
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295 | uint32_t s; |
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296 | if ( BSP_mem_size > 0x80000000 ) { |
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297 | BSP_mem_size = 0x80000000; |
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298 | printk("Memory clipped to 0x%08x for now, sorry\n", BSP_mem_size); |
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299 | } |
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300 | for ( s = 0x20000000; s < BSP_mem_size ; s<<=1) |
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301 | ; |
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302 | MMUoff(); |
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303 | /* since it's currently in use we must first surrender it */ |
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304 | setdbat(0, 0, 0, 0, 0); |
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305 | setdbat(0, 0, 0, s, _PAGE_RW); |
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306 | MMUon(); |
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307 | } |
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308 | |
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309 | printk("-----------------------------------------\n"); |
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310 | |
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311 | /* Maybe not setup yet because of the warning message */ |
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312 | |
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313 | /* Allocate and set up the page table mappings |
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314 | * This is only available on >604 CPUs. |
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315 | * |
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316 | * NOTE: This setup routine may modify the available memory |
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317 | * size. It is essential to call it before |
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318 | * calculating the workspace etc. |
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319 | */ |
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320 | pt = BSP_pgtbl_setup(&BSP_mem_size); |
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321 | if (!pt) |
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322 | printk("WARNING: unable to setup page tables.\n"); |
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323 | |
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324 | #ifdef SHOW_MORE_INIT_SETTINGS |
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325 | printk("Now BSP_mem_size = 0x%x\n",BSP_mem_size); |
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326 | #endif |
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327 | |
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328 | /* |
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329 | * Set up our hooks |
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330 | */ |
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331 | |
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332 | bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000); |
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333 | rtems_counter_initialize_converter( |
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334 | BSP_bus_frequency / (BSP_time_base_divisor / 1000) |
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335 | ); |
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336 | |
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337 | #ifdef SHOW_MORE_INIT_SETTINGS |
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338 | printk( |
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339 | "Configuration.work_space_size = %x\n", |
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340 | rtems_configuration_get_work_space_size() |
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341 | ); |
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342 | #endif |
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343 | |
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344 | /* Activate the page table mappings only after |
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345 | * initializing interrupts because the irq_mng_init() |
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346 | * routine needs to modify the text |
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347 | */ |
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348 | if ( pt ) { |
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349 | #ifdef SHOW_MORE_INIT_SETTINGS |
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350 | printk("Page table setup finished; will activate it NOW...\n"); |
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351 | #endif |
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352 | BSP_pgtbl_activate(pt); |
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353 | } |
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354 | |
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355 | #ifdef SHOW_MORE_INIT_SETTINGS |
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356 | printk("Going to start PCI buses scanning and initialization\n"); |
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357 | #endif |
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358 | BSP_pci_initialize(); |
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359 | |
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360 | /* need to tweak the motload setup */ |
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361 | BSP_motload_pci_fixup(); |
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362 | |
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363 | /* map 512M, 256 for PCI 256 for VME */ |
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364 | setdbat(5,BSP_PCI_HOSE0_MEM_BASE, BSP_PCI_HOSE0_MEM_BASE, BSP_PCI_HOSE0_MEM_SIZE, IO_PAGE); |
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365 | setdbat(6,BSP_PCI_HOSE1_MEM_BASE, BSP_PCI_HOSE1_MEM_BASE, 0x10000000, IO_PAGE); |
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366 | |
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367 | #ifdef SHOW_MORE_INIT_SETTINGS |
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368 | printk("Number of PCI buses found is : %d\n", pci_bus_count()); |
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369 | #endif |
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370 | |
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371 | /* |
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372 | * Initialize hardware timer facility (not used by BSP itself) |
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373 | * Needs PCI to identify discovery version... |
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374 | */ |
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375 | BSP_timers_initialize(); |
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376 | |
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377 | #ifdef SHOW_MORE_INIT_SETTINGS |
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378 | printk("MSR 0x%lx \n", _read_MSR()); |
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379 | printk("Exit from bspstart\n"); |
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380 | #endif |
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381 | } |
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382 | |
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383 | RTEMS_SYSINIT_ITEM( |
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384 | BSP_vme_config, |
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385 | RTEMS_SYSINIT_BSP_PRE_DRIVERS, |
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386 | RTEMS_SYSINIT_ORDER_MIDDLE |
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387 | ); |
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