Re: [ECOS] compile redboot error for AT91EB40

[Andrew Lunn <andrew dot lunn at ascom dot ch>]

On Sat, Aug 10, 2002 at 04:41:57PM -0600, Gary Thomas wrote:
> On Sat, 2002-08-10 at 17:58, shouyi wrote:
> > ecos-discuss:
> > 
> > When I compile redboot for AT91EB40 board, there is a error occured.
> > 
> > arm-elf-gcc -c  -I/ecos-g/OS/eCos/temp/redboot_eb40_1_install/include -I/ecos-g/OS/eCos/CVS/ecos/packages/hal/arm/arch/current -I/ecos-g/OS/eCos/CVS/ecos/packages/hal/arm/arch/current/src -I/ecos-g/OS/eCos/CVS/ecos/packages/hal/arm/arch/current/tests -I. -I/ecos-g/OS/eCos/CVS/ecos/packages/hal/arm/arch/current/src/ -mcpu=arm7tdmi -mno-short-load-words -Wall -Wpointer-arith -Wstrict-prototypes -Winline -Wundef -Woverloaded-virtual -g -O2 -ffunction-sections -fdata-sections -fno-rtti -fno-exceptions -fvtable-gc -finit-priority -Wp,-MD,src/redboot_linux_exec.tmp -o src/hal_arm_arch_redboot_linux_exec.o /ecos-g/OS/eCos/CVS/ecos/packages/hal/arm/arch/current/src/redboot_linux_exec.c
> > /ecos-g/OS/eCos/CVS/ecos/packages/hal/arm/arch/current/src/redboot_linux_exec.c:75: #error 
> > make[1]: Leaving directory `/ecos-g/OS/eCos/temp/redboot_eb40_1_build/hal/arm/arch/current'
> > make[1]: *** [src/redboot_linux_exec.o.d] Error 1
> > make: Leaving directory `/ecos-g/OS/eCos/temp/redboot_eb40_1_build'
> > make: *** [build] Error 2
> > 
> > if I remark line 75 in redboot_linux_exec.c, it will be ok. 
> > 
> > So, what is the matter, is there any effect if I remark the 75th line?
> > 
> > how to resolve this problem?

This is broken for quite a lot of the ARM targets. The hal/arm/arch
code assumes the macro CYGARC_PHYSICAL_ADDRESS is defined in the
HAL. Only a few do define it: aaed2000, excalibur, ebsa, intergrator,
sa11x0 & xscale. The others are broken.

Interestingly, the actual code is..

#ifndef CYGARC_PHYSICAL_ADDRESS
# error
# define CYGARC_PHYSICAL_ADDRESS(x) (x)
#endif

So it looks like whoever wrote the code thinks a sensible fall back is
to assume a straight 1-1 mapping. The HAL can override this if
required.

May we should just remove the #error line and fix any HALs that are
reported not to work?

         Andrew

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