diff options
Diffstat (limited to 'doc/README.p2020rdb')
| -rw-r--r-- | doc/README.p2020rdb | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/doc/README.p2020rdb b/doc/README.p2020rdb deleted file mode 100644 index cb664a5..0000000 --- a/doc/README.p2020rdb +++ /dev/null @@ -1,145 +0,0 @@ -Overview --------- -P2020RDB is a Low End Dual core platform supporting the P2020 processor -of QorIQ series. P2020 is an e500 based dual core SOC. - -Building U-boot ------------ -To build the u-boot for P2020RDB: - make P2020RDB_config - make - -NOR Flash Banks ------------ -RDB board for P2020 has two flash banks. They are both present on boot. - -Booting by default is always from the boot bank at 0xef00_0000. - -Memory Map ----------- -0xef00_0000 - 0xef7f_ffff Alternate bank 8MB -0xe800_0000 - 0xefff_ffff Boot bank 8MB - -0xef78_0000 - 0xef7f_ffff Alternate u-boot address 512KB -0xeff8_0000 - 0xefff_ffff Boot u-boot address 512KB - -Switch settings to boot from the NOR flash banks ------------------------------------------------- -SW4[8]=0 default NOR Flash bank -SW4[8]=1 Alternate NOR Flash bank - -Flashing Images ---------------- -To place a new u-boot image in the alternate flash bank and then boot -with that new image temporarily, use this: - tftp 1000000 u-boot.bin - erase ef780000 ef7fffff - cp.b 1000000 ef780000 80000 - -Now to boot from the alternate bank change the SW4[8] from 0 to 1. - -To program the image in the boot flash bank: - tftp 1000000 u-boot.bin - protect off all - erase eff80000 ffffffff - cp.b 1000000 eff80000 80000 - -Using the Device Tree Source File ---------------------------------- -To create the DTB (Device Tree Binary) image file, -use a command similar to this: - - dtc -b 0 -f -I dts -O dtb p2020rdb.dts > p2020rdb.dtb - -Likely, that .dts file will come from here; - - linux-2.6/arch/powerpc/boot/dts/p2020rdb.dts - -Booting Linux -------------- -Place a linux uImage in the TFTP disk area. - - tftp 1000000 uImage.p2020rdb - tftp 2000000 rootfs.ext2.gz.uboot - tftp c00000 p2020rdb.dtb - bootm 1000000 2000000 c00000 - -Implementing AMP(Asymmetric MultiProcessing) ---------------------------------------------- -1. Build kernel image for core0: - - a. $ make 85xx/p1_p2_rdb_defconfig - - b. $ make menuconfig - - un-select "Processor support"-> - "Symetric multi-processing support" - - c. $ make uImage - - d. $ cp arch/powerpc/boot/uImage /tftpboot/uImage.core0 - -2. Build kernel image for core1: - - a. $ make 85xx/p1_p2_rdb_defconfig - - b. $ make menuconfig - - Un-select "Processor support"-> - "Symetric multi-processing support" - - Select "Advanced setup" -> - "Prompt for advanced kernel configuration options" - - Select - "Set physical address where the kernel is loaded" - and set it to 0x20000000, assuming core1 will - start from 512MB. - - Select "Set custom page offset address" - - Select "Set custom kernel base address" - - Select "Set maximum low memory" - - "Exit" and save the selection. - - c. $ make uImage - - d. $ cp arch/powerpc/boot/uImage /tftpboot/uImage.core1 - -3. Create dtb for core0: - - $ dtc -I dts -O dtb -f -b 0 - arch/powerpc/boot/dts/p2020rdb_camp_core0.dts > - /tftpboot/p2020rdb_camp_core0.dtb - -4. Create dtb for core1: - - $ dtc -I dts -O dtb -f -b 1 - arch/powerpc/boot/dts/p2020rdb_camp_core1.dts > - /tftpboot/p2020rdb_camp_core1.dtb - -5. Bring up two cores separately: - - a. Power on the board, under u-boot prompt: - => setenv <serverip> - => setenv <ipaddr> - => setenv bootargs root=/dev/ram rw console=ttyS0,115200 - b. Bring up core1's kernel first: - => setenv bootm_low 0x20000000 - => setenv bootm_size 0x10000000 - => tftp 21000000 uImage.core1 - => tftp 22000000 ramdiskfile - => tftp 20c00000 p2020rdb_camp_core1.dtb - => interrupts off - => bootm start 21000000 22000000 20c00000 - => bootm loados - => bootm ramdisk - => bootm fdt - => fdt boardsetup - => fdt chosen $initrd_start $initrd_end - => bootm prep - => cpu 1 release $bootm_low - $fdtaddr - - c. Bring up core0's kernel(on the same u-boot console): - => setenv bootm_low 0 - => setenv bootm_size 0x20000000 - => tftp 1000000 uImage.core0 - => tftp 2000000 ramdiskfile - => tftp c00000 p2020rdb_camp_core0.dtb - => bootm 1000000 2000000 c00000 - -Please note only core0 will run u-boot, core1 starts kernel directly -after "cpu release" command is issued. |