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| author | Jesper Nilsson <jesper.nilsson@axis.com> | 2010-08-02 18:13:45 +0200 |
|---|---|---|
| committer | Jesper Nilsson <jesper.nilsson@axis.com> | 2010-08-04 13:00:09 +0200 |
| commit | cd4f20110cf46ab7ca35ea32d601576b31abd9bb (patch) | |
| tree | 31cd14ab3ab1a4a1b2dedeaf8aba5f59d257d0f3 /arch/cris | |
| parent | CRIS: Simple insn reschedule to avoid interlocks. (diff) | |
| download | linux-cd4f20110cf46ab7ca35ea32d601576b31abd9bb.tar.xz linux-cd4f20110cf46ab7ca35ea32d601576b31abd9bb.zip | |
CRIS: Faster syscall entry for CRISv32.
Signed-off-by: Edgar Iglesias <Edgar.Iglesias@axis.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Diffstat (limited to 'arch/cris')
| -rw-r--r-- | arch/cris/arch-v32/kernel/entry.S | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/arch/cris/arch-v32/kernel/entry.S b/arch/cris/arch-v32/kernel/entry.S index ce121df3aaef..0ecb50b8f0d9 100644 --- a/arch/cris/arch-v32/kernel/entry.S +++ b/arch/cris/arch-v32/kernel/entry.S @@ -131,27 +131,24 @@ _resume_userspace: system_call: ;; Stack-frame similar to the irq heads, which is reversed in ;; ret_from_sys_call. - subq 12, $sp ; Skip EXS, EDA. - move $erp, [$sp] - subq 4, $sp - move $srp, [$sp] - subq 4, $sp - move $ccs, [$sp] - subq 4, $sp - ei ; Allow IRQs while handling system call - move $spc, [$sp] - subq 4, $sp - move $mof, [$sp] - subq 4, $sp - move $srs, [$sp] - subq 4, $sp - move.d $acr, [$sp] - subq 14*4, $sp ; Make room for R0-R13. - movem $r13, [$sp] ; Push R0-R13 - subq 4, $sp - move.d $r10, [$sp] ; Push orig_r10. -; Set S-bit when kernel debugging to keep hardware breakpoints active. + sub.d 92, $sp ; Skip EXS and EDA. + movem $r13, [$sp] + move.d $sp, $r8 + addq 14*4, $r8 + move.d $acr, $r0 + move $srs, $r1 + move $mof, $r2 + move $spc, $r3 + move $ccs, $r4 + move $srp, $r5 + move $erp, $r6 + subq 4, $sp + movem $r6, [$r8] + ei ; Enable interrupts while processing syscalls. + move.d $r10, [$sp] + + ; Set S-bit when kernel debugging to keep hardware breakpoints active. #ifdef CONFIG_ETRAX_KGDB move $ccs, $r0 or.d (1<<9), $r0 |