The kernel config file is KERNCONF=MPC85XX, so the usual procedure applies:
1. make buildworld TARGET_ARCH=powerpc
2. make buildkernel TARGET_ARCH=powerpc TARGET_CPUTYPE=e500 KERNCONF=MPC85XX
This default config uses kernel-level FPU emulation. For the soft-float world
approach:
1. make buildworld TARGET_ARCH=powerpc TARGET_CPUTYPE=e500
2. disable FPU_EMU option in sys/powerpc/conf/MPC85XX
3. make buildkernel TARGET_ARCH=powerpc TARGET_CPUTYPE=e500 KERNCONF=MPC85XX
Approved by: cognet (mentor)
MFp4: e500
passed unmodified to gcc. Therefore, "prescott" should be used for Prescott,
Nocona, Core and Core 2 CPUs when building 32-bit code, and "nocona" should
be used for Prescott, Nocona and Core 2 CPUs when building 64-bit code.
MFC after: 3 weeks
treating them as an alias. Treat the shorthand versions as aliases.
+ Separate the x86 GCC CPU CFLAGS from the ICC CFLAGS. This greatly
simplifies the GCC section. It also makes it more clear which CPU's
have the same ICC CPU CFLAGS.
+ Remove redundancy in the alpha section.
+ Add forgotten ICC CPU CFLAGS for the mobile Intel CPU's added in rev. 1.42.
Fix 'broken' ifdefs.
icc does not support profiling yet so remove unfinished code which was
supposed to help.
Submitted by: netchild (original version)
Reviewed by: ru
Intel C/C++ compiler (lang/icc) to build the kernel.
The icc CPUTYPE CFLAGS use icc v7 syntax, icc v8 moans about them, but
doesn't abort. They also produce CPU specific code (new instructions
of the CPU, not only CPU specific scheduling), so if you get coredumps
with signal 4 (SIGILL, illegal instruction) you've used the wrong
CPUTYPE.
Incarnations of this patch survive gcc compiles and my make universe.
I use it on my desktop.
To use it update share/mk, add
/usr/local/intel/compiler70/ia32/bin (icc v7, works)
or
/usr/local/intel_cc_80/bin (icc v8, doesn't work)
to your PATH, make sure you have a new kernel compile directory
(e.g. MYKERNEL_icc) and run
CFLAGS="-O2 -ip" CC=icc make depend
CFLAGS="-O2 -ip" CC=icc make
in it.
Don't compile with -ipo, the build infrastructure uses ld directly to
link the kernel and the modules, but -ipo needs the link step to be
performed with Intel's linker.
Problems with icc v8:
- panic: npx0 cannot be emulated on an SMP system
- UP: first start of /bin/sh results in a FP exception
Parts of this commit contains suggestions or submissions from
Marius Strobl <marius@alchemy.franken.de>.
Reviewed by: silence on -arch
Submitted by: netchild
known to produce broken code with -march=pentium4. Add a note explaining this.
This should be removed when we update to gcc 3.3 or the bug is otherwise fixed.
Approved by: re
lowest value in order to get the right MACHINE_CPU values since setting
CPUTYPE can result in problems later in the buildkernel case. Instead,
set MACHINE_CPU directly and leave CPUTYPE alone.
Tested by: mbr
