1Motorola MPC85xxCDS boards 2-------------------------- 3 4The CDS family of boards consists of a PCI backplane called the 5"Arcadia", a PCI-form-factor carrier card that plugs into a PCI slot, 6and a CPU daughter card that bolts onto the daughter card. 7 8Much of the content of the README.mpc85xxads for the 85xx ADS boards 9applies to the 85xx CDS boards as well. In particular the toolchain, 10the switch nomenclature, and the basis for the memory map. There are 11some differences, though. 12 13 14Building U-Boot 15--------------- 16 17The Binutils in current ELDK toolchain will not support MPC85xx 18chip. You need to use binutils-2.14.tar.bz2 (or newer) from 19 http://ftp.gnu.org/gnu/binutils. 20 21The 85xx CDS code base is known to compile using: 22 gcc (GCC) 3.2.2 20030217 (Yellow Dog Linux 3.0 3.2.2-2a) 23 24 25Memory Map 26---------- 27 28The memory map for U-Boot and linux has been extended w.r.t. the ADS 29platform to allow for utilization of all 85xx CDS devices. The memory 30map is setup for linux to operate properly. The linux source when 31configured for MPC85xx CDS has been updated to reflect the new memory 32map. 33 34The mapping is: 35 36 0x0000_0000 0x7fff_ffff DDR 2G 37 0x8000_0000 0x9fff_ffff PCI1 MEM 512M 38 0xa000_0000 0xbfff_ffff PCI2 MEM 512M 39 0xe000_0000 0xe00f_ffff CCSR 1M 40 0xe200_0000 0xe2ff_ffff PCI1 IO 16M 41 0xe300_0000 0xe3ff_ffff PCI2 IO 16M 42 0xf000_0000 0xf7ff_ffff SDRAM 128M 43 0xf800_0000 0xf80f_ffff NVRAM/CADMUS (*) 1M 44 0xff00_0000 0xff7f_ffff FLASH (2nd bank) 8M 45 0xff80_0000 0xffff_ffff FLASH (boot bank) 8M 46 47 (*) The system control registers (CADMUS) start at offset 0xfdb0_4000 48 within the NVRAM/CADMUS region of memory. 49 50 51Using Flash 52----------- 53 54The CDS board has two flash banks, each 8MB in size (2^23 = 0x00800000). 55There is a switch which allows the boot-bank to be selected. The switch 56settings for updating flash are given below. 57 58The U-Boot commands for copying the boot-bank into the secondary bank are 59as follows: 60 61 erase ff780000 ff7fffff 62 cp.b fff80000 ff780000 80000 63 64 65U-Boot/kermit commands for downloading an image, then copying 66it into the secondary bank: 67 68 loadb 69 [Drop to kermit: 70 ^\c 71 send <u-boot-bin-image> 72 c 73 ] 74 75 erase ff780000 ff7fffff 76 cp.b $loadaddr ff780000 80000 77 78 79U-Boot commands for downloading an image via tftp and flashing 80it into the second bank: 81 82 tftp 10000 <u-boot.bin.image> 83 erase ff780000 ff7fffff 84 cp.b 10000 ff780000 80000 85 86 87After copying the image into the second bank of flash, be sure to toggle 88SW2[2] on the carrier card before resetting the board in order to set the 89secondary bank as the boot-bank. 90 91 92Carrier Board Switches 93---------------------- 94 95As a reminder, you should read the README.mpc85xxads too. 96 97Most switches on the carrier board should not be changed. The only 98user-settable switches on the carrier board are used to configure 99the flash banks and determining the PCI slot. 100 101The first two bits of SW2 control how flash is used on the board: 102 103 12345678 104 -------- 105 SW2=00XXXXXX FLASH: Boot bank 1, bank 2 available. 106 01XXXXXX FLASH: Boot bank 2, bank 1 available (swapped). 107 10XXXXXX FLASH: Boot promjet, bank 1 available 108 11XXXXXX FLASH: Boot promjet, bank 2 available 109 110The boot bank is always mapped to FF80_0000 and listed first by 111the "flinfo" command. The secondary bank is always FF00_0000. 112 113When using PCI, linux needs to know to which slot the CDS carrier is 114connected.. By convention, the user-specific bits of SW2 are used to 115convey this information: 116 117 12345678 118 -------- 119 SW2=xxxxxx00 PCI SLOT INFORM: The CDS carrier is in slot0 of the Arcadia 120 xxxxxx01 PCI SLOT INFORM: The CDS carrier is in slot1 of the Arcadia 121 xxxxxx10 PCI SLOT INFORM: The CDS carrier is in slot2 of the Arcadia 122 xxxxxx11 PCI SLOT INFORM: The CDS carrier is in slot3 of the Arcadia 123 124These are cleverly, er, clearly silkscreened as Slot 1 through 4, 125respectively, on the Arcadia near the support posts. 126 127 128The default setting of all switches on the carrier board is: 129 130 12345678 131 -------- 132 SW1=01101100 133 SW2=0x1111yy x=Flash bank, yy=PCI slot 134 SW3=11101111 135 SW4=10001000 136 137 1388555/41 CPU Card Switches 139------------------------- 140 141Most switches on the CPU Card should not be changed. However, the 142frequency can be changed by setting SW3: 143 144 12345678 145 -------- 146 SW3=XX00XXXX == CORE:CCB 2:1 147 XX01XXXX == CORE:CCB 5:2 148 XX10XXXX == CORE:CCB 3:1 149 XX11XXXX == CORE:CCB 7:2 150 XXXX1000 == CCB:SYSCLK 8:1 151 XXXX1010 == CCB:SYSCLK 10:1 152 153A safe default setting for all switches on the CPU board is: 154 155 12345678 156 -------- 157 SW1=10001111 158 SW2=01000111 159 SW3=00001000 160 SW4=11111110 161 162 1638548 CPU Card Switches 164---------------------- 165And, just to be confusing, in this set of switches: 166 167 ON = 1 168 OFF = 0 169 170Default 171 SW1=11111101 172 SW2=10011111 173 SW3=11001000 (8X) (2:1) 174 SW4=11110011 175 176 SW3=X000XXXX == CORE:CCB 4:1 177 X001XXXX == CORE:CCB 9:2 178 X010XXXX == CORE:CCB 1:1 179 X011XXXX == CORE:CCB 3:2 180 X100XXXX == CORE:CCB 2:1 181 X101XXXX == CORE:CCB 5:2 182 X110XXXX == CORE:CCB 3:1 183 X111XXXX == CORE:CCB 7:2 184 XXXX0000 == CCB:SYSCLK 16:1 185 XXXX0001 == RESERVED 186 XXXX0010 == CCB:SYSCLK 2:1 187 XXXX0011 == CCB:SYSCLK 3:1 188 XXXX0100 == CCB:SYSCLK 4:1 189 XXXX0101 == CCB:SYSCLK 5:1 190 XXXX0110 == CCB:SYSCLK 6:1 191 XXXX0111 == RESERVED 192 XXXX1000 == CCB:SYSCLK 8:1 193 XXXX1001 == CCB:SYSCLK 9:1 194 XXXX1010 == CCB:SYSCLK 10:1 195 XXXX1011 == RESERVED 196 XXXX1100 == CCB:SYSCLK 12:1 197 XXXX1101 == CCB:SYSCLK 20:1 198 XXXX1110 == RESERVED 199 XXXX1111 == RESERVED 200 201 202eDINK Info 203---------- 204 205One bank of flash may contain an eDINK image. 206 207Memory Map: 208 209 CCSRBAR @ 0xe0000000 210 Flash Bank 1 @ 0xfe000000 211 Flash Bank 2 @ 0xff000000 212 Ram @ 0 213 214Commands for downloading a U-Boot image to memory from edink: 215 216 env -c 217 time -s 4/8/2004 4:30p 218 dl -k -b -o 100000 219 [Drop to kermit: 220 ^\c 221 transmit /binary <u-boot-bin-image> 222 c 223 ] 224 225 fu -l 100000 fe780000 80000 226