Re: [ECOS] Problem building library for Viper target

[Gary Thomas <gthomas at redhat dot com>]

On Tue, 2002-02-19 at 13:43, Paul Randall wrote:
> Hi all,
> 
> I am building the eCos library for the A&M Viper board.  The build goes
> successfully except for some code in if_fec.c (ethernet drivers for the
> PowerPC MPC860T).  The build produces the following error:
> 
> make[1]: Entering directory
> `/ecos-c/cygwin/src/ecos/viper_build/devs/eth/powerpc/fec/current'
> powerpc-eabi-gcc -c  -I/ecos-c/cygwin/src/ecos/viper_install/include
> -I/ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current
> -I/ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src
> -I/ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/tests
> -I. -I/ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/
> -msoft-float -mcpu=860 -Wall -Wpointer-arith -Wstrict-prototypes
> -Winline -Wundef -Woverloaded-virtual -g -O2 -ffunction-sections
> -fdata-sections -fno-rtti -fno-exceptions -fvtable-gc -finit-priority
> -D_KERNEL -D__ECOS -Wp,-MD,src/if_fec.tmp -o
> src/devs_eth_powerpc_fec_if_fec.o
> /ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/if_fec.c
> 
> /ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/if_fec.c:
> In function `fec_eth_init':
> /ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/if_fec.c:260:
> warning: asm operand 0 probably doesn't match constraints
> /ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/if_fec.c:260:
> invalid lvalue in assignment
> /ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/if_fec.c:191:
> warning: `proc_rev' might be used uninitialized in this function
> /ecos-c/cygwin/src/ecos/packages/devs/eth/powerpc/fec/current/src/if_fec.c:260:
> inconsistent operand constraints in an `asm'
> make[1]: *** [src/if_fec.o.d] Error 1
> make[1]: Leaving directory
> `/ecos-c/cygwin/src/ecos/viper_build/devs/eth/powerpc/fec/current'
> make: *** [build] Error 2
> make: Leaving directory `/ecos-c/cygwin/src/ecos/viper_build'
> 
> The following lines of code in fec_eth_init of if_fec.c are apparently
> at fault:
> 
> 260      CYGARC_MFSPR( proc_rev, CYGARC_REG_PVR );
> 261  #define PROC_REVB 0x0020
> 262      if ((proc_rev & 0x0000FFFF) == PROC_REVB) {
> 263          eppc->pio_pddir = 0x1C58;
> 264      } else {
> 265          eppc->pio_pddir = 0x1FFF;
> 266      }
> 
> The code is retrieving the processor revision from the Processor Version
> Register in the Special Purpose Register and checking whether the MPC860
> is revision B.  I commented out all the above lines except line 265
> (assuming my target doesn't use the Rev. B processor) and the library
> build was successful.  Do I need to set some additional compiler options
> or does the code need to be changed?

What version of GCC are you using?


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