README
1Freescale MPC8315ERDB Board
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3
41. Board Switches and Jumpers
5
6 S3 is used to set CONFIG_SYS_RESET_SOURCE.
7
8 To boot the image at 0xFE000000 in NOR flash, use these DIP
9 switch settings for S3 S4:
10
11 +------+ +------+
12 | | | **** |
13 | **** | | |
14 +------+ ON +------+ ON
15 4321 4321
16 (where the '*' indicates the position of the tab of the switch.)
17
18 To boot the image at the beginning of NAND flash, use these
19 DIP switch settings for S3 S4:
20
21 +------+ +------+
22 | * | | *** |
23 | *** | | * |
24 +------+ ON +------+ ON
25 4321 4321
26 (where the '*' indicates the position of the tab of the switch.)
27
28 When booting from NAND, use u-boot-nand.bin, not u-boot.bin.
29
302. Memory Map
31 The memory map looks like this:
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33 0x0000_0000 0x07ff_ffff DDR 128M
34 0x8000_0000 0x8fff_ffff PCI MEM 256M
35 0x9000_0000 0x9fff_ffff PCI_MMIO 256M
36 0xe000_0000 0xe00f_ffff IMMR 1M
37 0xe030_0000 0xe03f_ffff PCI IO 1M
38 0xe060_0000 0xe060_7fff NAND FLASH (CS1) 32K
39 0xfe00_0000 0xfe7f_ffff NOR FLASH (CS0) 8M
40
41 When booting from NAND, NAND flash is CS0 and NOR flash
42 is CS1.
43
443. Definitions
45
463.1 Explanation of NEW definitions in:
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48 include/configs/MPC8315ERDB.h
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50 CONFIG_MPC83xx MPC83xx family
51 CONFIG_MPC831x MPC831x specific
52 CONFIG_MPC8315 MPC8315 specific
53 CONFIG_MPC8315ERDB MPC8315ERDB board specific
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554. Compilation
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57 Assuming you're using BASH (or similar) as your shell:
58
59 export CROSS_COMPILE=your-cross-compiler-prefix-
60 make distclean
61 make MPC8315ERDB_config (or MPC8315ERDB_NAND_config for u-boot-nand.bin)
62 make all
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645. Downloading and Flashing Images
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665.1 Reflash U-Boot Image using U-Boot
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68 NOR flash:
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70 tftp 40000 u-boot.bin
71 protect off all
72 erase fe000000 fe1fffff
73
74 cp.b 40000 fe000000 xxxx
75 protect on all
76
77 You have to supply the correct byte count with 'xxxx'
78 from the TFTP result log.
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80 NAND flash:
81
82 =>tftpboot $loadaddr <filename>
83 =>nand erase 0 0x80000
84 =>nand write $loadaddr 0 0x80000
85
86 ...where 0x80000 is the filesize rounded up to
87 the next 0x20000 increment.
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895.2 Downloading and Booting Linux Kernel
90
91 Ensure that all networking-related environment variables are set
92 properly (including ipaddr, serverip, gatewayip (if needed),
93 netmask, ethaddr, eth1addr, rootpath (if using NFS root),
94 fdtfile, and bootfile).
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96 Then, do one of the following, depending on whether you
97 want an NFS root or a ramdisk root:
98
99 =>run nfsboot
100 or
101 =>run ramboot
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1036 Notes
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105 The console baudrate for MPC8315ERDB is 115200bps.
106