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annotate packages/hal/powerpc/moab/current/src/moab.S @ 1223:dbcfe4e0dbd2

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New platform - TAMS MOAB - and generic changes to support it
author gthomas
date Fri, 19 Sep 2003 17:11:18 +0000
parents
children 0c4f43524d06
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1223
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1 ##=============================================================================
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2 ##
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3 ## moab.S
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4 ##
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5 ## MOAB board hardware setup
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6 ##
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7 ##=============================================================================
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8 #####ECOSGPLCOPYRIGHTBEGIN####
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9 ## -------------------------------------------
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10 ## This file is part of eCos, the Embedded Configurable Operating System.
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11 ## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 ## Copyright (C) 2002, 2003 Gary Thomas
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13 ##
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14 ## eCos is free software; you can redistribute it and/or modify it under
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15 ## the terms of the GNU General Public License as published by the Free
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16 ## Software Foundation; either version 2 or (at your option) any later version.
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17 ##
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18 ## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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19 ## WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 ## for more details.
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22 ##
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23 ## You should have received a copy of the GNU General Public License along
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24 ## with eCos; if not, write to the Free Software Foundation, Inc.,
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25 ## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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26 ##
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27 ## As a special exception, if other files instantiate templates or use macros
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28 ## or inline functions from this file, or you compile this file and link it
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29 ## with other works to produce a work based on this file, this file does not
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30 ## by itself cause the resulting work to be covered by the GNU General Public
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31 ## License. However the source code for this file must still be made available
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32 ## in accordance with section (3) of the GNU General Public License.
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33 ##
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34 ## This exception does not invalidate any other reasons why a work based on
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35 ## this file might be covered by the GNU General Public License.
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36 ##
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37 ## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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38 ## at http://sources.redhat.com/ecos/ecos-license/
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39 ## -------------------------------------------
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40 #####ECOSGPLCOPYRIGHTEND####
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41 ##=============================================================================
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42 #######DESCRIPTIONBEGIN####
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43 ##
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44 ## Author(s): gthomas
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45 ## Contributors:hmt
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46 ## Date: 2002-07-22
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47 ## Purpose: MOAB board hardware setup
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48 ## Description: This file contains any code needed to initialize the
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49 ## hardware on a TAMS MOAB (PowerPC 405GPr) board.
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50 ##
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51 ######DESCRIPTIONEND####
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52 ##
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53 ##=============================================================================
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54
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55 #include <pkgconf/hal.h>
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56 #include <cyg/hal/arch.inc> /* register symbols et al */
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57 #define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS
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58 #include <cyg/hal/ppc_regs.h> /* on-chip resource layout, special */
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59
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60 #------------------------------------------------------------------------------
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61
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62 // No useable LEDs
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63 #define LED(x)
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64
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65 #------------------------------------------------------------------------------
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66
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67 FUNC_START( hal_hardware_init )
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68 mflr r30 // Save return address
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69
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70 #ifndef CYG_HAL_STARTUP_RAM
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71
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72 li r3,0x00000000 // Make sure nothing is cacheable
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73 mticcr r3
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74 mtdccr r3
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75
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76 // Force data caches to be totally clean
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77 lwi r3,0
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78 lwi r4,0x8000
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79 10: dcbf 0,r3
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80 dccci 0,r3
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81 addi r3,r3,16
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82 cmpw r3,r4
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83 bne 10b
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84
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85 // Basic chip configuration
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86 #if CYGHWR_HAL_POWERPC_CPU_SPEED == 250
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87 lwi r3,0x09f8102a
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88 lwi r3,0x09f8502a
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89 #elif CYGHWR_HAL_POWERPC_CPU_SPEED == 333
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90 lwi r3,0x09f8503a
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91 #else
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92 #error "Unsupported board/CPU speed"
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93 #endif
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94 mtdcr DCR_CPC0_CR0,r3
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95 li r3,0x00000000
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96 mtdcr DCR_CPC0_CR1,r3
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97
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98 lwi r3,0x60606000 // Edge conditioning register
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99 mtdcr DCR_CPC0_ECR,r3
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100
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101 // GPIO
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102 // GPIO 13 - I - media present
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103 // GPIO 14 - O - main flash ALE
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104 // GPIO 15 - O - main flash CLE
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105 // GPIO 16 - I - watchdog ?
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106 // GPIO 17 - O - NAND CE
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107 // GPIO 24 - O - heartbeat LED
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108 lwi r4,GPIO_OR // Leave NAND not-selected, heartbeat off
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109 lwi r3,0x00004080
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110 stw r3,0(r4)
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111 lwi r4,GPIO_TCR // Tri-state control - enables outputs
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112 lwi r3,0x0003C080
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113 stw r3,0(r4)
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114
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115 li r3,DCR_SDRAM0_CFG // See if SDRAM already configured
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116 mtdcr DCR_SDRAM0_CFGADDR,r3
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117 mfdcr r4,DCR_SDRAM0_CFGDATA
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118 lwi r3,0x80800000
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119 and r4,r4,r3
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120 cmpw r3,r4
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121 beq sdram_ok
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122
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123 // DRAM controller
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124 li r3,DCR_SDRAM0_CFG // Turn off controller to allow changes
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125 lwi r4,0x00000000
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126 mtdcr DCR_SDRAM0_CFGADDR,r3
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127 mtdcr DCR_SDRAM0_CFGDATA,r4
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128 li r3,DCR_SDRAM0_TR
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129 lwi r4,0x010A800E
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130 mtdcr DCR_SDRAM0_CFGADDR,r3
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131 mtdcr DCR_SDRAM0_CFGDATA,r4
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132 li r3,DCR_SDRAM0_RTR
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133 lwi r4,0x05F00000
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134 mtdcr DCR_SDRAM0_CFGADDR,r3
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135 mtdcr DCR_SDRAM0_CFGDATA,r4
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136 li r3,DCR_SDRAM0_B1CR // Note: non-ascending addresses because
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137 lwi r4,0x00062001 // the low 1/2 of memory fails on some boards
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138 mtdcr DCR_SDRAM0_CFGADDR,r3
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139 mtdcr DCR_SDRAM0_CFGDATA,r4
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140 li r3,DCR_SDRAM0_B0CR
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141 lwi r4,0x02062001
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142 mtdcr DCR_SDRAM0_CFGADDR,r3
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143 mtdcr DCR_SDRAM0_CFGDATA,r4
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144
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145 lwi r4,GPIO_OR // Turn heartbeat LED on
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146 lwi r3,0x00004000
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147 stw r3,0(r4)
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148
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149 lwi r3,0xA000 // Pause for at least 200us
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150 mtctr r3
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151 13: nop
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152 bdnz 13b
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153
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154 li r3,DCR_SDRAM0_CFG // Enable controller
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155 lwi r4,0x80800000
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156 mtdcr DCR_SDRAM0_CFGADDR,r3
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157 mtdcr DCR_SDRAM0_CFGDATA,r4
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158
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159 sdram_ok:
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160 // Bus controller
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161 li r3,DCR_EBC0_B0AP // BOOT FLASH at 0xFFExxxxx, R/W
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162 lwi r4,0x7F8FFE80
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163 mtdcr DCR_EBC0_CFGADDR,r3
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164 mtdcr DCR_EBC0_CFGDATA,r4
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165 li r3,DCR_EBC0_B0CR
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166 lwi r4,0xFFE38000
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167 mtdcr DCR_EBC0_CFGADDR,r3
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168 mtdcr DCR_EBC0_CFGDATA,r4
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169 li r3,DCR_EBC0_B1AP // MAIN FLASH at 0xCxxxxxxx, R/W
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170 lwi r4,0x7F8FFE00
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171 mtdcr DCR_EBC0_CFGADDR,r3
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172 mtdcr DCR_EBC0_CFGDATA,r4
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173 li r3,DCR_EBC0_B1CR
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174 lwi r4,0xC0018000 // 1MB, 8bits [actually only 1 byte!]
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175 mtdcr DCR_EBC0_CFGADDR,r3
dbcfe4e0dbd2 New platform - TAMS MOAB - and generic changes to support it
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176 mtdcr DCR_EBC0_CFGDATA,r4
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177
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178 // On-chip memory
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179 lwi r4,0xD0000000 // Instruction/Data at 0xD0XXXXXX..0xD7XXXXXX
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180 lwi r3,0x80000000
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181 mtdcr DCR_OCM0_ISARC,r4
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182 mtdcr DCR_OCM0_DSARC,r4
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183 mtdcr DCR_OCM0_ISCNTL,r3
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184 mtdcr DCR_OCM0_DSCNTL,r3
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185
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186 lwi r4,GPIO_OR // Turn heartbeat LED off
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187 lwi r3,0x00004080
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188 stw r3,0(r4)
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189
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190 #endif // ROM or ROMRAM startup
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191
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192 lwi r3,0x80000001 // DRAM can be cached - instructions only
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193 iccci 0,r3
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194 mticcr r3
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195 li r3,0x00000000
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196 mtdccr r3
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197
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198 #ifdef CYG_HAL_STARTUP_ROMRAM
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199 // Copy image from ROM to RAM
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200 mr r6,r30
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201 lwi r7,0xFFF80000
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202 and r6,r6,r7
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203 subi r6,r6,4
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204 lwi r7,0-4 // where to copy to
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205 lwi r8,__ram_data_end
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206 10: lwzu r5,4(r6)
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207 stwu r5,4(r7)
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208 cmplw r7,r8
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209 bne 10b
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210 lwi r30,_hal_hardware_init_done
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211 #endif
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212
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213 lwi r4,GPIO_OR // Turn heartbeat LED on
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214 lwi r3,0x00004000
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215 stw r3,0(r4)
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216
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217 mtlr r30 // Restore return address
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218 blr
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219 FUNC_END( hal_hardware_init )
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220
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221 .globl _hang
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222 _hang: nop
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223 b _hang
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224 blr
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225
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226 #if 0
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227 .text
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228 .globl _get_cache_contents
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229 _get_cache_contents:
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230 subi r3,r3,4
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231 li r4,256
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232 mtctr r4
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233 li r4,0 // Address
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234 lwi r7,0xFFFFFFE0
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235 mfspr r5,SPR_CCR0
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236 10: and r5,r5,r7 // CIS=0,CWS=0 => DATA, WAY A
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237 mtspr SPR_CCR0,r5
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238 sync
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239 isync
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240 dcread r6,0,r4
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241 stwu r6,4(r3)
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242 and r5,r5,r7 // CIS=0,CWS=1 => DATA, WAY B
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243 ori r5,r5,0x01
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244 mtspr SPR_CCR0,r5
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245 sync
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246 isync
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247 mfspr r5,SPR_CCR0
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248 dcread r6,0,r4
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249 stwu r6,4(r3)
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250 and r5,r5,r7 // CIS=1,CWS=0 => TAG, WAY A
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251 ori r5,r5,0x10
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252 mtspr SPR_CCR0,r5
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253 sync
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254 isync
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255 dcread r6,0,r4
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256 stwu r6,4(r3)
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257 and r5,r5,r7 // CIS=1,CWS=1 => TAG, WAY B
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258 ori r5,r5,0x11
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259 mtspr SPR_CCR0,r5
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260 sync
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261 isync
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262 dcread r6,0,r4
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263 stwu r6,4(r3)
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264 addi r4,r4,32
dbcfe4e0dbd2 New platform - TAMS MOAB - and generic changes to support it
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265 bdnz 10b
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266 blr
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267 #endif
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268
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269 #ifndef CYG_HAL_STARTUP_RAM
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270 .section ".reset_vector","ax"
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271 ba 0xFFF80100
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272 .previous
dbcfe4e0dbd2 New platform - TAMS MOAB - and generic changes to support it
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273 #endif
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274
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275 #------------------------------------------------------------------------------
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276 # end of moab.S