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wdenk7ebf7442002-11-02 23:17:16 +00001Cogent Modular Architecture configuration
2-----------------------------------------
3
4As the name suggests, the Cogent platform is a modular system where
5you have a motherboard into which plugs a cpu module and one or more
6i/o modules. This provides very nice flexibility, but makes the
7configuration task somewhat harder.
8
9The possible Cogent motherboards are:
10
11Code Config Variable Description
12---- --------------- -----------
13
14CMA101 CONFIG_CMA101 32MB ram, 2 ser, 1 par, rtc, dipsw,
15 2x16 lcd, eth(?)
16CMA102 CONFIG_CMA102 32MB ram, 2 ser, 1 par, rtc, dipsw,
17 2x16 lcd
18CMA111 CONFIG_CMA111 32MB ram, 1MB flash, 4 ser, 1 par,
19 rtc, ps/2 kbd/mse, 2x16 lcd, 2xPCI,
20 10/100TP eth
21CMA120 CONFIG_CMA120 32MB ram, 1MB flash, 4 ser, 1 par,
22 rtc, ps/2 kbd/mse, 2x16 lcd, 2xPCI,
23 10/100TP eth, 2xPCMCIA, video/lcd-panel
24CMA150 CONFIG_CMA150 8MB ram, 1MB flash, 2 ser, 1 par, rtc,
25 ps/2 kbd/mse, 2x16 lcd
26
27The possible Cogent PowerPC CPU modules are:
28
29Code Config Variable Description
30---- --------------- -----------
31
32CMA278-603EV CONFIG_CMA278_603EV PPC603ev CPU, 66MHz clock, 512K EPROM,
33 JTAG/COP
34CMA278-603ER CONFIG_CMA278_603ER PPC603er CPU, 66MHz clock, 512K EPROM,
35 JTAG/COP
36CMA278-740 CONFIG_CMA278_740 PPC740 CPU, 66MHz clock, 512K EPROM,
37 JTAG/COP
38CMA280-509 CONFIG_CMA280_509 MPC505/509 CPU, 50MHz clock,
39 512K EPROM, BDM
40CMA282 CONFIG_CMA282 MPC8260 CPU, 66MHz clock, 512K EPROM,
41 JTAG, 16M RAM, 1 x ser (SMC2),
42 1 x 10baseT PHY (SCC4), 1 x 10/100 TP
43 PHY (FCC1), 2 x 48pin DIN (FCC2 + TDM1)
44CMA285 CONFIG_CMA285 MPC801 CPU, 33MHz clock, 512K EPROM,
45 BDM
46CMA286-21 CONFIG_CMA286_21 MPC821 CPU, 66MHz clock, 512K EPROM,
47 BDM, 16M RAM, 2 x ser (SMC1 + SMC2),
48 1 x 10baseT PHY (SCC2)
49CMA286-60-OLD CONFIG_CMA286_60_OLD MPC860 CPU, 33MHz clock, 128K EPROM,
50 BDM
51CMA286-60 CONFIG_CMA286_60 MPC860 CPU, 66MHz clock, 512K EPROM,
52 BDM, 16M RAM, 2 x ser (SMC1 + SMC2),
53 1 x 10baseT PHY (SCC2)
54CMA286-60P CONFIG_CMA286_60P MPC860P CPU, 66MHz clock, 512K EPROM,
55 BDM, 16M RAM, 2 x ser (SMC1 + SMC2),
56 1 x 10baseT PHY (SCC2)
57CMA287-23 CONFIG_CMA287_23 MPC823 CPU, 33MHz clock, 512K EPROM,
58 BDM
59CMA287-50 CONFIG_CMA287_50 MPC850 CPU, 33MHz clock, 512K EPROM,
60 BDM
61
62(there are a lot of other cpu modules with ARM, MIPS and M-CORE CPUs,
63but we'll worry about those later).
64
65The possible Cogent CMA I/O Modules are:
66
67Code Config Variable Description
68---- --------------- -----------
69
70CMA302 CONFIG_CMA302 up to 16M flash, ps/2 keyboard/mouse
71CMA352 CONFIG_CMA352 CMAbus <=> PCI
72
73Currently supported:
74
75 Motherboards: CMA102
76 CPU Modules: CMA286-60-OLD
77 I/O Modules: CMA302 I/O module
78
79To configure, perform the usual U-Boot configuration task of editing
80"include/config_cogent_mpc8xx.h" and reviewing all the options and
81settings in there. In particular, check the chip select values
82installed into the memory controller's various option and base
83registers - these are set by the defines CFG_CMA_CSn_{BASE,SIZE} and
84CFG_{B,O}Rn_PRELIM. Also be careful of the clock settings installed
85into the SCCR - via the define CFG_SCCR. Finally, decide whether you
86want the serial console on motherboard serial port A or on one of the
878xx SMC ports, and set CONFIG_8xx_CONS_{SMC1,SMC2,NONE} accordingly
88(NONE means use Cogent motherboard serial port A).
89
90Then edit the file "cogent/config.mk". Firstly, set TEXT_BASE to be
91the base address of the EPROM for the CPU module. This should be the
92same as the value selected for CFG_MONITOR_BASE in
93"include/config_cogent_*.h" (in fact, I have made this automatic via
94the -DTEXT_BASE=... option in CPPFLAGS).
95
96Finally, set the values of the make variables $(CMA_MB) and $(CMA_IOMS).
97
98$(CMA_MB) is the name of the directory that contains support for your
99motherboard. At this stage, only "cma10x" exists, which supports the
100CMA101 and CMA102 motherboards - but only selected devices, namely
101serial, lcd and dipsw.
102
103$(CMA_IOMS) is a list of zero or more directories that contain
104support for the i/o modules you have installed. At this stage, only
105"cma302" exists, which supports the CMA302 flash i/o module - but
106only the flash part, not the ps/2 keyboard and mouse interfaces.
107
108There should be a make variable for each of the above directories,
109which is the directory name with "_O" appended. This make variable is
110a list of object files to compile from that directory and include in
111the library.
112
113 e.g. cma10x_O = serial.o ...
114
115That's it. Good Luck.
116
117Murray.Jensen@cmst.csiro.au
118August 31, 2000.