This series of patches add mpc7448hpc2 board support. Mpc7448hpc2 (taiga) board is a high-performance PowerPC server reference design.
This is the second version for this board support according to the feedback from mailing list. Roy
Signed-off-by: Roy Zang tie-fei.zang@freescale.com
--- doc/README.mpc7448hpc2 | 181 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 181 insertions(+), 0 deletions(-)
diff --git a/doc/README.mpc7448hpc2 b/doc/README.mpc7448hpc2 new file mode 100644 index 0000000..00fda4e --- /dev/null +++ b/doc/README.mpc7448hpc2 @@ -0,0 +1,181 @@ +Freescale MPC7448hpc2 (Taiga) board +-------------------------- +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. + + +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 +