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Re: [microblaze-uclinux] Microblaze bootloop question
Hi David,
> XMD% dow -data simple/executable.elf 0x81800000
The syntax for downloading Elf file in XMD is,
XMD% dow simple/executable.elf - This will download the elf and change
PC to Elf start address
XMD% con - Continue execution of the program
- Raj
david moloney wrote:
> The following simple program works fine when downloaded to BRAM either
> from the EDK as part of the bitstream or via XMD as a file using dow
> simple/executable.elf.
>
> main() {
> int i=1;
> while (i) {
> xil_printf("hello world! %d\n\r",i++);
> }
> }
>
> Downloading the bitstream via XMD into the external SDRAM with
> bootloader rather than application initialization in BRAM as suggested
> in Chapter 9 of the Xilinx User Guide and executing the following
> sequence of XMD commands below results (see end of mail) in the program
> being stuck in a loop in the bootloader (look at the rrd and stp
> commands below) code created automatically by the BSB for the NuHorizons
> Spartan3 board.
>
> .section ".boot","ax"
>
> _boot: bri 0
>
> Would I be right in that I need to change the bootloader from the
> default one in C:\EDK\sw\lib\microblaze\src called mb_bootloop.s and/or
> the associated linker script mb_bootloop.linkerscript?
> If so does anyone have such a bootloop or can you suggest how I can
> modify the existing one to work with my board which has its SDRAM
> located at 0x81800000.
>
> Regards,
>
> - David
>
>
> XMD trace below:
>
> Xilinx Microprocessor Debug (XMD) Engine
> Xilinx EDK 6.2 Build EDK_Gm.11
> Copyright (c) 1995-2002 Xilinx, Inc. All rights reserved.
> XMD% mbconnect mdm
> Connecting to cable (Parallel Port - LPT1).
> Checking cable driver.
> Driver windrvr6.sys version = 6.0.3.0. LPT base address = 0378h.
> ECP base address = 0778h.
> Cable connection established.
>
> JTAG chain configuration
> --------------------------------------------------
> Device ID Code IR Length Part Name
> 1 05046093 8 XCF04S
> 2 0141c093 6 XC3S400
> Assuming, Device No: 2 contains the MicroBlaze system
> Connected to the JTAG MicroBlaze Debug Module (MDM)
> No of processors = 1
>
> MicroBlaze Processor 1 Configuration :
> -------------------------------------
> Version............................2.00.a
> No of PC Breakpoints...............2
> No of Read Addr/Data Watchpoints...1
> No of Write Addr/Data Watchpoints..1
> Instruction Cache Support..........off
> Data Cache Support.................off
> WARNING:: MHS file not specified..
> Cannot Check Microblaze-MDM FSL Connectivity !!
> INFO:: No MHS,Assuming No MDM-FSL-MB Connection
> JTAG MDM Connected to Mircoblaze 1
> Connected to MicroBlaze "mdm" target. id = 0
> Starting GDB server for "mdm" target (id = 0) at TCP port no 1234
> XMD% dow -data simple/executable.elf 0x81800000
> XMD% rrd
> r0: 00000000 r8: 00000000 r16: 00000000 r24: 00000000
> r1: 00000000 r9: 00000000 r17: 00000000 r25: 00000000
> r2: 00000000 r10: 00000000 r18: 00000000 r26: 00000000
> r3: 00000000 r11: 00000000 r19: 00000000 r27: 00000000
> r4: 00000000 r12: 00000000 r20: 00000000 r28: 00000000
> r5: 00000000 r13: 00000000 r21: 00000000 r29: 00000000
> r6: 00000000 r14: 00000000 r22: 00000000 r30: 00000000
> r7: 00000000 r15: 00000000 r23: 00000000 r31: 00000000
> pc: 00000000 msr: 00000000
> XMD% stp
> BREAKPOINT at
> 0: B8000000 bri 0
> XMD% stp
> BREAKPOINT at
> 0: B8000000 bri 0
> XMD% stp
> BREAKPOINT at
> 0: B8000000 bri 0
> XMD% rrd
> r0: 00000000 r8: 00000000 r16: 00000000 r24: 00000000
> r1: 00000000 r9: 00000000 r17: 00000000 r25: 00000000
> r2: 00000000 r10: 00000000 r18: 00000000 r26: 00000000
> r3: 00000000 r11: 00000000 r19: 00000000 r27: 00000000
> r4: 00000000 r12: 00000000 r20: 00000000 r28: 00000000
> r5: 00000000 r13: 00000000 r21: 00000000 r29: 00000000
> r6: 00000000 r14: 00000000 r22: 00000000 r30: 00000000
> r7: 00000000 r15: 00000000 r23: 00000000 r31: 00000000
> pc: 00000000 msr: 00000000
> XMD% run
> Processor started. Type "stop" to stop processor
> RUNNING> stop
> XMD%
> Processor stopped at PC: 0x00008000
> XMD% rrd
> r0: 00000000 r8: 00000000 r16: 00000000 r24: 00000000
> r1: 00000000 r9: 00000000 r17: 00000000 r25: 00000000
> r2: 00000000 r10: 00000000 r18: 00000000 r26: 00000000
> r3: 00000000 r11: 00000000 r19: 00000000 r27: 00000000
> r4: 00000000 r12: 00000000 r20: 00000000 r28: 00000000
> r5: 00000000 r13: 00000000 r21: 00000000 r29: 00000000
> r6: 00000000 r14: 00000000 r22: 00000000 r30: 00000000
> r7: 00000000 r15: 00000000 r23: 00000000 r31: 00000000
> pc: 00008000 msr: 00000000
> ___________________________
> microblaze-uclinux mailing list
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> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
> Mailing List Archive :
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>
--
-- Raj
_
/ /\/ Raj Nagarajan (raj.nagarajan@xilinx.com)
\ \ Xilinx
/ / 2100 Logic Drive
\_\/\ San Jose, CA 95124 USA
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