wdenk | 03f5c55 | 2004-10-10 21:21:55 +0000 | [diff] [blame^] | 1 | Motorola MPC85xxCDS boards |
| 2 | -------------------------- |
| 3 | |
| 4 | The 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, |
| 6 | and a CPU daughter card that bolts onto the daughter card. |
| 7 | |
| 8 | Much of the content of the README.mpc85xxads for the 85xx ADS boards |
| 9 | applies to the 85xx CDS boards as well. In particular the toolchain, |
| 10 | the switch nomenclature, and the basis for the memory map. There are |
| 11 | some differences, though. |
| 12 | |
| 13 | |
| 14 | Building U-Boot |
| 15 | --------------- |
| 16 | |
| 17 | The Binutils in current ELDK toolchain will not support MPC85xx |
| 18 | chip. You need to use binutils-2.14.tar.bz2 (or newer) from |
| 19 | http://ftp.gnu.org/gnu/binutils. |
| 20 | |
| 21 | The 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 | |
| 25 | Memory Map |
| 26 | ---------- |
| 27 | |
| 28 | The memory map for u-boot and linux has been extended w.r.t. the ADS |
| 29 | platform to allow for utilization of all 85xx CDS devices. The memory |
| 30 | map is setup for linux to operate properly. The linux source when |
| 31 | configured for MPC85xx CDS has been updated to reflect the new memory |
| 32 | map. |
| 33 | |
| 34 | The 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 | |
| 51 | Using Flash |
| 52 | ----------- |
| 53 | |
| 54 | The CDS board has two flash banks, each 8MB in size (2^23 = 0x00800000). |
| 55 | There is a switch which allows the boot-bank to be selected. The switch |
| 56 | settings for updating flash are given below. |
| 57 | |
| 58 | The u-boot commands for copying the boot-bank into the secondary bank are |
| 59 | as follows: |
| 60 | |
| 61 | erase ff780000 ff7fffff |
| 62 | cp.b fff80000 ff780000 80000 |
| 63 | |
| 64 | |
| 65 | U-boot/kermit commands for downloading an image, then copying |
| 66 | it 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 | |
| 79 | U-boot commands for downloading an image via tftp and flashing |
| 80 | it into the second bank: |
| 81 | |
| 82 | tftp 10000 <u-boot.bin.image> |
| 83 | erase ff780000 ff7fffff |
| 84 | cp.b 10000 ff780000 80000 |
| 85 | |
| 86 | |
| 87 | After copying the image into the second bank of flash, be sure to toggle |
| 88 | SW2[2] on the carrier card before resetting the board in order to set the |
| 89 | secondary bank as the boot-bank. |
| 90 | |
| 91 | |
| 92 | Carrier Board Switches |
| 93 | ---------------------- |
| 94 | |
| 95 | As a reminder, you should read the README.mpc85xxads too. |
| 96 | |
| 97 | Most switches on the carrier board should not be changed. The only |
| 98 | user-settable switches on the carrier board are used to configure |
| 99 | the flash banks and determining the PCI slot. |
| 100 | |
| 101 | The 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 | |
| 110 | The boot bank is always mapped to FF80_0000 and listed first by |
| 111 | the "flinfo" command. The secondary bank is always FF00_0000. |
| 112 | |
| 113 | When using PCI, linux needs to know to which slot the CDS carrier is |
| 114 | connected.. By convention, the user-specific bits of SW2 are used to |
| 115 | convey 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 | |
| 124 | These are cleverly, er, clearly silkscreened as Slot 1 through 4, |
| 125 | respectively, on the Arcadia near the support posts. |
| 126 | |
| 127 | |
| 128 | The 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 | |
| 138 | CPU Card Switches |
| 139 | ----------------- |
| 140 | |
| 141 | Most switches on the CPU Card should not be changed. However, the |
| 142 | frequency 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 | |
| 153 | A 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 | |
| 163 | eDINK Info |
| 164 | ---------- |
| 165 | |
| 166 | One bank of flash may contain an eDINK image. |
| 167 | |
| 168 | Memory Map: |
| 169 | |
| 170 | CCSRBAR @ 0xe0000000 |
| 171 | Flash Bank 1 @ 0xfe000000 |
| 172 | Flash Bank 2 @ 0xff000000 |
| 173 | Ram @ 0 |
| 174 | |
| 175 | Commands for downloading a u-boot image to memory from edink: |
| 176 | |
| 177 | env -c |
| 178 | time -s 4/8/2004 4:30p |
| 179 | dl -k -b -o 100000 |
| 180 | [Drop to kermit: |
| 181 | ^\c |
| 182 | transmit /binary <u-boot-bin-image> |
| 183 | c |
| 184 | ] |
| 185 | |
| 186 | fu -l 100000 fe780000 80000 |
| 187 | |