Thiemo Seufer a écrit :
On Fri, Mar 24, 2006 at 06:41:32PM +0100, Aurelien Jarno wrote:
[snip]

Hmm, you select the hal.o file accordingly?  Won't mips1-le-elf work
on both R1 and R2?  Checking for R1/R2 doesn't seem ideal to me if it
can be avoided.

Thiemo, any comment?


At least for 32bit kernels this looks like a viable option, if the hal
layer is sufficiently simple (i.e. no dependency to kernel headers).

Same for 64bit kernels and MIPS-III.

So in short we could use mipsisa32-{be,le}-elf on all machines but the one that have CONFIG_CPU_MIPS32_R1 or CONFIG_CPU_MIPS32_R2 set to one. Am I right?


Erm, depends on what "mipsisa32" selects in that case.
The compatibility tree is:

                / -> MIPS-III -> MIPS-IV -> MIPS64 -> MIPS64R2  # 64bit
                |                             ^          ^
                |                             |          |
MIPS-I -> MIPS-II ------------------------> MIPS32 -> MIPS32R2  # 32bit

so you need MIPS-I for 32bit Kernels and MIPS-III for 64bit kernels.
For the current compilers in Debian this can be selected via
-march=mips1 and -march=mips3 respectively.

Calling a file mipsisa32 when it selects mips1 sounds like a horrible
case of obfuscation. :-)


Does this help to determine the right file to use?

mips1-le-elf.hal.o.uu: ELF 32-bit LSB relocatable, MIPS, MIPS-I version 1 (SYSV), not stripped mips-le-elf.hal.o.uu: ELF 32-bit LSB relocatable, MIPS, MIPS-II version 1 (SYSV), not stripped mipsisa32-le-elf.hal.o.uu: ELF 32-bit LSB relocatable, MIPS, MIPS-III version 1 (SYSV), not stripped

Thanks,
Aurelien

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