Vladimir Gurevich wrote:
Hello Gautam.
gautam borad wrote:
I'm trying to port u-boot-1.1.2 to mpc852t on ep852 board (from embedded planet). I'm using RPXClassic as reference.
I've successfully ported U-boot to EP852 sometime ago. Unfortunately, I still didn't get a chance to update to the latest U-boot so that I could submit the patches officially. These patches are based on a snapshot of U-boot repository made sometime in April 2005, but I hope they should apply more or less cleanly to the current source as well.
Give'em a shot if you want and let me know whether they work for you.
Thanks, Vladimir
Hi, Thanks for giving the patch. I tried using your patch but it doesnt work, i get the following on the console:
-------------------------------------------------------------------------------------------------------------------------------------------------------- U-Boot 1.1.3 (Oct 20 2005 - 15:35:24) EP852
CPU: MPC852TxxZPnn at 50 MHz [25.0...125.0 MHz] 4 kB I-Cache 4 kB D-Cache FEC present
Board: EP852 (Rev. e4). CPLD Rev: 00 DIP Switch: 1111 DRAM: 16 MB FLASH: Bus Fault @ 0x00fab008, fixup 0x00000000 Machine check in kernel mode. Caused by (from msr): regs 00f5bdd8 Unknown values in msr NIP: 00FAB008 XER: 20002800 LR: 00FAAF5C REGS: 00f5bdd8 TRAP: 0200 DAR: 7172EEC4 MSR: 00001002 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
GPR00: FF800000 00F5BEC8 00000000 0000003E 00FCF314 000000C4 00000059 00002088 GPR08: 00000000 FF800000 FF8000C4 FF8000D0 28000022 000080A0 00FCFF00 0179C000 GPR16: 00800080 40002400 00010000 00000035 00000002 00000047 00000002 00000002 GPR24: 00000000 00FCF430 00FCF43C 00000000 00FCF467 00F5BF8C 00FD0548 00FCF314 Call backtrace: 00FAAE94 00FA9F24 00FA4EA8 00F9E3B0 machine check Bus Fault @ 0x00fa439c, fixup 0x00000000 Machine check in kernel mode. Caused by (from msr): regs 00f5bc18 Unknown values in msr NIP: 00FA439C XER: 00002800 LR: 00FA07F4 REGS: 00f5bc18 TRAP: 0200 DAR: 66D64FEB MSR: 00001002 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
GPR00: 039A5080 00F5BD08 00000000 00000000 00000000 00000000 00000000 002845D3 GPR08: 00FA3874 FA200000 00000000 00989680 00000000 000080A0 00FCFF00 0179C000 GPR16: 00800080 40002400 00010000 00000035 00001002 00F5BDC8 00000000 00F9E09C GPR24: 00F9E654 00FCF430 00FCF43C 00000000 00FCF467 00F5BF8C 00FCFF24 00F5BDD8 Call backtrace: 00FA3870 00FA07F4 00F9E730 00F9E09C 00FAAE94 00FA9F24 00FA4EA8 00F9E3B0 machine check Bus Fault @ 0x00fa439c, fixup 0x00000000 Machine check in kernel mode. Caused by (from msr): regs 00f5ba58 Unknown values in msr NIP: 00FA439C XER: 00002800 LR: 00FA07F4 REGS: 00f5ba58 TRAP: 0200 DAR: 00F5BDD8 MSR: 00001002 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 00
GPR00: 039A5080 00F5BB48 00000000 00000000 00000000 00000000 00000000 0047D480 GPR08: 00FA3874 FA200000 00000000 00989680 00000000 000080A0 00FCFF00 0179C000 GPR16: 008. -------------------------------------------------------------------------------------------------------------------------------------------------------- I realized the problem was cfi_flash when i tried it with u-boot 1.1.2 which also gave the above error.(previously it didnt give the above error) So I took the flash.c file from RPXClassic directory. The board has 2 AMD AM29LV320MB (8 MB each) flash. In the flash.c the auto select command (to read manufactor ID) returns 0x227e227e. However in include/flash.h i have #define AMD_ID_LV320B 0x22F922F9 . 227E227E is defined for AMD_ID_DL640. Why is this so?? I've modified #define AMD_ID_LV320B to 0x227E227E , but is this the right way?? The flash starts at 0xFF800000. Got the following dump: -------------------------------------------------------------------------------------------------------------------------------------------------------- U-Boot 1.1.3 (Oct 20 2005 - 17:29:22) EP852
CPU: MPC852TxxZPnn at 50 MHz [25.0...125.0 MHz] 4 kB I-Cache 4 kB D-Cache FEC present
Board: EP852 (Rev. e4). CPLD Rev: 00 DIP Switch: 1111 DRAM: 16 MB FLASH: Flash addr:ff800000### ERROR ### Please RESET the board ### --------------------------------------------------------------------------------------------------------------------------------------------------------
I've made some modifications to the original config files . Here are the changes:
#define CFG_PRELIM_OR_AM 0xFF800000 #define CFG_OR_TIMING_FLASH (OR_SCY_4_CLK | OR_BI) #define CFG_BR0_PRELIM 0xFF800001 #define CFG_OR1_PRELIM 0xFF000600 #define CFG_MPTPR MPTPR_PTP_DIV2 #define CFG_BR3_PRELIM 0xFA400001 #define CFG_OR3_PRELIM 0xFF7F8970 #define CFG_PLPRCR 0x000A4000
If I dont give these values the board does not work.I got these values from the config file i got from embedded planet. I dont have any other option.Is it OK to modify these values?
Also what actually does U-Boot does when a decrementer exception is generated? Please see my previous post. The code gave a decrementer exception went into timer_interrupt and halted.
Thanks in advance.