mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 15:12:21 +00:00
184 lines
4.3 KiB
Text
184 lines
4.3 KiB
Text
Freescale MPC7448hpc2 (Taiga) board
|
|
===================================
|
|
|
|
Created 08/11/2006 Roy Zang
|
|
--------------------------
|
|
MPC7448hpc2 (Taiga) board is a high-performance PowerPC server reference
|
|
design, which is optimized for high speed throughput between the processor and
|
|
the memory, disk drive and Ethernet port subsystems.
|
|
|
|
MPC7448hpc2(Taiga) is designed to the micro-ATX chassis, allowing it to be
|
|
used in 1U or 2U rack-mount chassis¡¯, as well as in standard ATX/Micro-ATX
|
|
chassis.
|
|
|
|
Building U-Boot
|
|
------------------
|
|
The mpc7448hpc2 code base is known to compile using:
|
|
Binutils 2.15, Gcc 3.4.3, Glibc 2.3.3
|
|
|
|
$ make mpc7448hpc2_config
|
|
Configuring for mpc7448hpc2 board...
|
|
|
|
$ make
|
|
|
|
Memory Map
|
|
----------
|
|
|
|
The memory map is setup for Linux to operate properly.
|
|
|
|
The mapping is:
|
|
|
|
Range Start Range End Definition Size
|
|
|
|
0x0000_0000 0x7fff_ffff DDR 2G
|
|
0xe000_0000 0xe7ff_ffff PCI Memory 128M
|
|
0xfa00_0000 0xfaff_ffff PCI IO 16M
|
|
0xfb00_0000 0xfbff_ffff PCI Config 16M
|
|
0xfc00_0000 0xfc0f_ffff NVRAM/CADMUS 1M
|
|
0xfe00_0000 0xfeff_ffff PromJet 16M
|
|
0xff00_0000 0xff80_0000 FLASH (boot flash) 8M
|
|
0xff80_0000 0xffff_ffff FLASH (second half flash) 8M
|
|
|
|
Using Flash
|
|
-----------
|
|
|
|
The MPC7448hpc2 board has two "banks" of flash, each 8MB in size
|
|
(2^23 = 0x00800000).
|
|
|
|
Note: the "bank" here refers to half of the flash. In fact, there is only one
|
|
bank of flash, which is divided into low and high half. Each is controlled by
|
|
the most significant bit of the address bus. The so called "bank" is only for
|
|
convenience.
|
|
|
|
There is a switch which allows the "bank" to be selected. The switch
|
|
settings for updating flash are given below.
|
|
|
|
The u-boot commands for copying the boot-bank into the secondary bank are
|
|
as follows:
|
|
|
|
erase ff800000 ff880000
|
|
cp.b ff000000 ff800000 80000
|
|
|
|
U-boot commands for downloading an image via tftp and flashing
|
|
it into the secondary bank:
|
|
|
|
tftp 10000 <u-boot.bin.image>
|
|
erase ff000000 ff080000
|
|
cp.b 10000 ff000000 80000
|
|
|
|
After copying the image into the second bank of flash, be sure to toggle
|
|
SW3[4] on board before resetting the board in order to set the
|
|
secondary bank as the boot-bank.
|
|
|
|
Board Switches
|
|
----------------------
|
|
|
|
Most switches on the board should not be changed. The most frequent
|
|
user-settable switches on the board are used to configure
|
|
the flash banks and determining the PCI frequency.
|
|
|
|
SW1[1-5]: Processor core voltage
|
|
|
|
12345 Core Voltage
|
|
-----
|
|
SW1=01111 1.000V.
|
|
SW1=01101 1.100V.
|
|
SW1=01011 1.200V.
|
|
SW1=01001 1.300V only for MPC7447A.
|
|
|
|
|
|
SW2[1-6]: CPU core frequency
|
|
|
|
CPU Core Frequency (MHz)
|
|
Bus Frequency
|
|
123456 100 133 167 200 Ratio
|
|
|
|
------
|
|
SW2=101100 500 667 833 1000 5x
|
|
SW2=100100 550 733 917 1100 5.5x
|
|
SW2=110100 600 800 1000 1200 6x
|
|
SW2=010100 650 866 1083 1300 6.5x
|
|
SW2=001000 700 930 1167 1400 7x
|
|
SW2=000100 750 1000 1250 1500 7.5x
|
|
SW2=110000 800 1066 1333 1600 8x
|
|
SW2=011000 850 1333 1417 1700 8.5x only for MPC7447A
|
|
SW2=011110 900 1200 1500 1800 9x
|
|
|
|
This table shows only a subset of available frequency options; see the CPU
|
|
hardware specifications for more information.
|
|
|
|
SW2[7-8]: Bus Protocol and CPU Reset Option
|
|
|
|
7
|
|
-
|
|
SW2=0 System bus uses MPX bus protocol
|
|
SW2=1 System bus uses 60x bus protocol
|
|
|
|
8
|
|
-
|
|
SW2=0 TSI108 can cause CPU reset
|
|
SW2=1 TSI108 can not cause CPU reset
|
|
|
|
SW3[1-8] system options
|
|
|
|
123
|
|
---
|
|
SW3=xxx Connected to GPIO[0:2] on TSI108
|
|
|
|
4
|
|
-
|
|
SW3=0 CPU boots from low half of flash
|
|
SW3=1 CPU boots from high half of flash
|
|
|
|
5
|
|
-
|
|
SW3=0 SATA and slot2 connected to PCI bus
|
|
SW3=1 Only slot1 connected to PCI bus
|
|
|
|
6
|
|
-
|
|
SW3=0 USB connected to PCI bus
|
|
SW3=1 USB disconnected from PCI bus
|
|
|
|
7
|
|
-
|
|
SW3=0 Flash is write protected
|
|
SW3=1 Flash is NOT write protected
|
|
|
|
8
|
|
-
|
|
SW3=0 CPU will boot from flash
|
|
SW3=1 CPU will boot from PromJet
|
|
|
|
SW4[1-3]: System bus frequency
|
|
|
|
Bus Frequency (MHz)
|
|
---
|
|
SW4=010 183
|
|
SW4=011 100
|
|
SW4=100 133
|
|
SW4=101 166 only for MPC7447A
|
|
SW4=110 200 only for MPC7448
|
|
others reserved
|
|
|
|
SW4[4-6]: DDR2 SDRAM frequency
|
|
|
|
Bus Frequency (MHz)
|
|
---
|
|
SW4=000 external clock
|
|
SW4=011 system clock
|
|
SW4=100 133
|
|
SW4=101 166
|
|
SW4=110 200
|
|
others reserved
|
|
|
|
SW4[7-8]: PCI/PCI-X frequency control
|
|
7
|
|
-
|
|
SW4=0 PCI/PCI-X bus operates normally
|
|
SW4=1 PCI bus forced to PCI-33 mode
|
|
|
|
8
|
|
-
|
|
SW4=0 PCI-X mode at 133 MHz allowed
|
|
SW4=1 PCI-X mode limited to 100 MHz
|