diff options
| author |   José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
|---|---|---|
| committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
| commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
| tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/h8300/lib/memcpy.S | |
| parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) | |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/h8300/lib/memcpy.S')
| -rw-r--r-- | kernel/arch/h8300/lib/memcpy.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/kernel/arch/h8300/lib/memcpy.S b/kernel/arch/h8300/lib/memcpy.S new file mode 100644 index 000000000..0c9a51fcd --- /dev/null +++ b/kernel/arch/h8300/lib/memcpy.S @@ -0,0 +1,85 @@ +;;; memcpy.S + +#include <asm/linkage.h> + +#if defined(CONFIG_CPU_H8300H) + .h8300h +#endif +#if defined(CONFIG_CPU_H8S) + .h8300s +#endif + .text +.global memcpy + +;;; void *memcpy(void *to, void *from, size_t n) +memcpy: + mov.l er2,er2 + bne 1f + rts +1: + ;; address check + bld #0,r0l + bxor #0,r1l + bcs 4f + mov.l er4,@-sp + mov.l er0,@-sp + btst #0,r0l + beq 1f + ;; (aligned even) odd address + mov.b @er1,r3l + mov.b r3l,@er0 + adds #1,er1 + adds #1,er0 + dec.l #1,er2 + beq 3f +1: + ;; n < sizeof(unsigned long) check + sub.l er4,er4 + adds #4,er4 ; loop count check value + cmp.l er4,er2 + blo 2f + ;; unsigned long copy +1: + mov.l @er1,er3 + mov.l er3,@er0 + adds #4,er0 + adds #4,er1 + subs #4,er2 + cmp.l er4,er2 + bcc 1b + ;; rest +2: + mov.l er2,er2 + beq 3f +1: + mov.b @er1,r3l + mov.b r3l,@er0 + adds #1,er1 + adds #1,er0 + dec.l #1,er2 + bne 1b +3: + mov.l @sp+,er0 + mov.l @sp+,er4 + rts + + ;; odd <- even / even <- odd +4: + mov.l er4,er3 + mov.l er2,er4 + mov.l er5,er2 + mov.l er1,er5 + mov.l er6,er1 + mov.l er0,er6 +1: + eepmov.w + mov.w r4,r4 + bne 1b + dec.w #1,e4 + bpl 1b + mov.l er1,er6 + mov.l er2,er5 + mov.l er3,er4 + rts + + .end |