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author | Paul Mundt <lethal@linux-sh.org> | 2007-11-21 17:58:13 +0900 |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-01-28 13:18:53 +0900 |
commit | 1e1ed39faec635b109ff8c516377310600623674 (patch) | |
tree | 2c751c9a642f399e2cf5b03aca64ed57f01700b2 /arch/sh/mm | |
parent | fb8e569c1d4f44a4632e2db95a27ed45734d4705 (diff) | |
download | kernel_samsung_smdk4412-1e1ed39faec635b109ff8c516377310600623674.zip kernel_samsung_smdk4412-1e1ed39faec635b109ff8c516377310600623674.tar.gz kernel_samsung_smdk4412-1e1ed39faec635b109ff8c516377310600623674.tar.bz2 |
sh: Copy over special CFLAGS for SH-5 TLB miss.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r-- | arch/sh/mm/Makefile_64 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/sh/mm/Makefile_64 b/arch/sh/mm/Makefile_64 index 5ff8358..2731cf1 100644 --- a/arch/sh/mm/Makefile_64 +++ b/arch/sh/mm/Makefile_64 @@ -17,3 +17,28 @@ obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_NUMA) += numa.o EXTRA_CFLAGS += -Werror + +# Special flags for fault_64.o. This puts restrictions on the number of +# caller-save registers that the compiler can target when building this file. +# This is required because the code is called from a context in entry.S where +# very few registers have been saved in the exception handler (for speed +# reasons). +# The caller save registers that have been saved and which can be used are +# r2,r3,r4,r5 : argument passing +# r15, r18 : SP and LINK +# tr0-4 : allow all caller-save TR's. The compiler seems to be able to make +# use of them, so it's probably beneficial to performance to save them +# and have them available for it. +# +# The resources not listed below are callee save, i.e. the compiler is free to +# use any of them and will spill them to the stack itself. + +CFLAGS_fault_64.o += -ffixed-r7 \ + -ffixed-r8 -ffixed-r9 -ffixed-r10 -ffixed-r11 -ffixed-r12 \ + -ffixed-r13 -ffixed-r14 -ffixed-r16 -ffixed-r17 -ffixed-r19 \ + -ffixed-r20 -ffixed-r21 -ffixed-r22 -ffixed-r23 \ + -ffixed-r24 -ffixed-r25 -ffixed-r26 -ffixed-r27 \ + -ffixed-r36 -ffixed-r37 -ffixed-r38 -ffixed-r39 -ffixed-r40 \ + -ffixed-r41 -ffixed-r42 -ffixed-r43 \ + -ffixed-r60 -ffixed-r61 -ffixed-r62 \ + -fomit-frame-pointer |