diff options
| author | Jesper Nilsson <jesper@jni.nu> | 2018-03-11 11:05:23 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2018-03-16 10:56:05 +0100 |
| commit | c690eddc2f3b44b24520f4a77cc3a4c9bde7d571 (patch) | |
| tree | b7ba2caa6ebb2e36a529f9bf7182c9e0a73d53c4 /arch/cris/arch-v32/lib/checksum.S | |
| parent | bb9d812643d8a121df7d614a2b9c60193a92deb0 (diff) | |
CRIS: Drop support for the CRIS port
The port was added back in 2000 so it's no longer even a good source
of inspiration for newer ports (if it ever was)
The last SoC (ARTPEC-3) with a CRIS main CPU was launched in 2008.
Coupled with time and working developer board hardware being
in low supply, it's time to drop the port from Linux.
So long and thanks for all the fish!
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/cris/arch-v32/lib/checksum.S')
| -rw-r--r-- | arch/cris/arch-v32/lib/checksum.S | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/arch/cris/arch-v32/lib/checksum.S b/arch/cris/arch-v32/lib/checksum.S deleted file mode 100644 index f773d4d93609..000000000000 --- a/arch/cris/arch-v32/lib/checksum.S +++ /dev/null @@ -1,89 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * A fast checksum routine using movem - * Copyright (c) 1998-2007 Axis Communications AB - * - * csum_partial(const unsigned char * buff, int len, unsigned int sum) - */ - - .globl csum_partial - .type csum_partial,@function -csum_partial: - - ;; r10 - src - ;; r11 - length - ;; r12 - checksum - - ;; Optimized for large packets - subq 10*4, $r11 - blt _word_loop - move.d $r11, $acr - - subq 9*4,$sp - clearf c - movem $r8,[$sp] - - ;; do a movem checksum - -_mloop: movem [$r10+],$r9 ; read 10 longwords - ;; Loop count without touching the c flag. - addoq -10*4, $acr, $acr - ;; perform dword checksumming on the 10 longwords - - addc $r0,$r12 - addc $r1,$r12 - addc $r2,$r12 - addc $r3,$r12 - addc $r4,$r12 - addc $r5,$r12 - addc $r6,$r12 - addc $r7,$r12 - addc $r8,$r12 - addc $r9,$r12 - - ;; test $acr without trashing carry. - move.d $acr, $acr - bpl _mloop - ;; r11 <= acr is not really needed in the mloop, just using the dslot - ;; to prepare for what is needed after mloop. - move.d $acr, $r11 - - ;; fold the last carry into r13 - addc 0, $r12 - movem [$sp+],$r8 ; restore regs - -_word_loop: - addq 10*4,$r11 ; compensate for last loop underflowing length - - moveq -1,$r9 ; put 0xffff in r9, faster than move.d 0xffff,r9 - lsrq 16,$r9 - - move.d $r12,$r13 - lsrq 16,$r13 ; r13 = checksum >> 16 - and.d $r9,$r12 ; checksum = checksum & 0xffff - -_no_fold: - subq 2,$r11 - blt _no_words - add.d $r13,$r12 ; checksum += r13 - - ;; checksum the rest of the words -_wloop: subq 2,$r11 - bge _wloop - addu.w [$r10+],$r12 - -_no_words: - addq 2,$r11 - ;; see if we have one odd byte more - bne _do_byte - nop - ret - move.d $r12,$r10 - -_do_byte: - ;; copy and checksum the last byte - addu.b [$r10],$r12 - ret - move.d $r12,$r10 - - .size csum_partial, .-csum_partial |