summaryrefslogtreecommitdiff
path: root/arch/cris/arch-v32/lib
diff options
context:
space:
mode:
Diffstat (limited to 'arch/cris/arch-v32/lib')
-rw-r--r--arch/cris/arch-v32/lib/Makefile7
-rw-r--r--arch/cris/arch-v32/lib/checksum.S89
-rw-r--r--arch/cris/arch-v32/lib/checksumcopy.S95
-rw-r--r--arch/cris/arch-v32/lib/csumcpfruser.S70
-rw-r--r--arch/cris/arch-v32/lib/delay.c29
-rw-r--r--arch/cris/arch-v32/lib/memset.c259
-rw-r--r--arch/cris/arch-v32/lib/strcmp.S21
-rw-r--r--arch/cris/arch-v32/lib/string.c236
-rw-r--r--arch/cris/arch-v32/lib/usercopy.c458
9 files changed, 0 insertions, 1264 deletions
diff --git a/arch/cris/arch-v32/lib/Makefile b/arch/cris/arch-v32/lib/Makefile
deleted file mode 100644
index e91cf02f625d..000000000000
--- a/arch/cris/arch-v32/lib/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Makefile for Etrax-specific library files..
-#
-
-lib-y = checksum.o checksumcopy.o string.o usercopy.o memset.o \
- csumcpfruser.o delay.o strcmp.o
-
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
diff --git a/arch/cris/arch-v32/lib/checksumcopy.S b/arch/cris/arch-v32/lib/checksumcopy.S
deleted file mode 100644
index a76e586d4114..000000000000
--- a/arch/cris/arch-v32/lib/checksumcopy.S
+++ /dev/null
@@ -1,95 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * A fast checksum+copy routine using movem
- * Copyright (c) 1998-2007 Axis Communications AB
- *
- * Authors: Bjorn Wesen
- *
- * csum_partial_copy_nocheck(const char *src, char *dst,
- * int len, unsigned int sum)
- */
-
- .globl csum_partial_copy_nocheck
- .type csum_partial_copy_nocheck,@function
-csum_partial_copy_nocheck:
-
- ;; r10 - src
- ;; r11 - dst
- ;; r12 - length
- ;; r13 - checksum
-
- ;; Optimized for large packets
- subq 10*4, $r12
- blt _word_loop
- move.d $r12, $acr
-
- subq 9*4,$sp
- clearf c
- movem $r8,[$sp]
-
- ;; do a movem copy and checksum
-1: ;; A failing userspace access (the read) will have this as PC.
-_mloop: movem [$r10+],$r9 ; read 10 longwords
- addoq -10*4, $acr, $acr ; loop counter in latency cycle
- movem $r9,[$r11+] ; write 10 longwords
-
- ;; perform dword checksumming on the 10 longwords
- addc $r0,$r13
- addc $r1,$r13
- addc $r2,$r13
- addc $r3,$r13
- addc $r4,$r13
- addc $r5,$r13
- addc $r6,$r13
- addc $r7,$r13
- addc $r8,$r13
- addc $r9,$r13
-
- ;; test $acr, without trashing carry.
- move.d $acr, $acr
- bpl _mloop
- ;; r12 <= acr is needed after mloop and in the exception handlers.
- move.d $acr, $r12
-
- ;; fold the last carry into r13
- addc 0, $r13
- movem [$sp+],$r8 ; restore regs
-
-_word_loop:
- addq 10*4,$r12 ; compensate for last loop underflowing length
-
- ;; fold 32-bit checksum into a 16-bit checksum, to avoid carries below
- ;; r9 can be used as temporary.
- move.d $r13,$r9
- lsrq 16,$r9 ; r0 = checksum >> 16
- and.d 0xffff,$r13 ; checksum = checksum & 0xffff
-
- subq 2, $r12
- blt _no_words
- add.d $r9,$r13 ; checksum += r0
-
- ;; copy and checksum the rest of the words
-2: ;; A failing userspace access for the read below will have this as PC.
-_wloop: move.w [$r10+],$r9
- addu.w $r9,$r13
- subq 2,$r12
- bge _wloop
- move.w $r9,[$r11+]
-
-_no_words:
- addq 2,$r12
- bne _do_byte
- nop
- ret
- move.d $r13,$r10
-
-_do_byte:
- ;; copy and checksum the last byte
-3: ;; A failing userspace access for the read below will have this as PC.
- move.b [$r10],$r9
- addu.b $r9,$r13
- move.b $r9,[$r11]
- ret
- move.d $r13,$r10
-
- .size csum_partial_copy_nocheck, . - csum_partial_copy_nocheck
diff --git a/arch/cris/arch-v32/lib/csumcpfruser.S b/arch/cris/arch-v32/lib/csumcpfruser.S
deleted file mode 100644
index 093cd757fcfa..000000000000
--- a/arch/cris/arch-v32/lib/csumcpfruser.S
+++ /dev/null
@@ -1,70 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Add-on to transform csum_partial_copy_nocheck in checksumcopy.S into
- * csum_partial_copy_from_user by adding exception records.
- *
- * Copyright (C) 2001, 2003 Axis Communications AB.
- *
- * Author: Hans-Peter Nilsson.
- */
-
-#include <asm/errno.h>
-
-/* Same function body, but a different name. If we just added exception
- records to _csum_partial_copy_nocheck and made it generic, we wouldn't
- know a user fault from a kernel fault and we would have overhead in
- each kernel caller for the error-pointer argument.
-
- unsigned int csum_partial_copy_from_user
- (const char *src, char *dst, int len, unsigned int sum, int *errptr);
-
- Note that the errptr argument is only set if we encounter an error.
- It is conveniently located on the stack, so the normal function body
- does not have to handle it. */
-
-#define csum_partial_copy_nocheck csum_partial_copy_from_user
-
-/* There are local labels numbered 1, 2 and 3 present to mark the
- different from-user accesses. */
-#include "checksumcopy.S"
-
- .section .fixup,"ax"
-
-;; Here from the movem loop; restore stack.
-4:
- movem [$sp+],$r8
-;; r12 is already decremented. Add back chunk_size-2.
- addq 40-2,$r12
-
-;; Here from the word loop; r12 is off by 2; add it back.
-5:
- addq 2,$r12
-
-;; Here from a failing single byte.
-6:
-
-;; Signal in *errptr that we had a failing access.
- move.d [$sp],$acr
- moveq -EFAULT,$r9
- subq 4,$sp
- move.d $r9,[$acr]
-
-;; Clear the rest of the destination area using memset. Preserve the
-;; checksum for the readable bytes.
- move.d $r13,[$sp]
- subq 4,$sp
- move.d $r11,$r10
- move $srp,[$sp]
- jsr memset
- clear.d $r11
-
- move [$sp+],$srp
- ret
- move.d [$sp+],$r10
-
- .previous
- .section __ex_table,"a"
- .dword 1b,4b
- .dword 2b,5b
- .dword 3b,6b
- .previous
diff --git a/arch/cris/arch-v32/lib/delay.c b/arch/cris/arch-v32/lib/delay.c
deleted file mode 100644
index db06a94ef646..000000000000
--- a/arch/cris/arch-v32/lib/delay.c
+++ /dev/null
@@ -1,29 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Precise Delay Loops for ETRAX FS
- *
- * Copyright (C) 2006 Axis Communications AB.
- *
- */
-
-#include <hwregs/reg_map.h>
-#include <hwregs/reg_rdwr.h>
-#include <hwregs/timer_defs.h>
-#include <linux/types.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-
-/*
- * On ETRAX FS, we can check the free-running read-only 100MHz timer
- * getting 32-bit 10ns precision, theoretically good for 42.94967295
- * seconds. Unsigned arithmetic and careful expression handles
- * wrapping.
- */
-
-void cris_delay10ns(u32 n10ns)
-{
- u32 t0 = REG_RD(timer, regi_timer0, r_time);
- while (REG_RD(timer, regi_timer0, r_time) - t0 < n10ns)
- ;
-}
-EXPORT_SYMBOL(cris_delay10ns);
diff --git a/arch/cris/arch-v32/lib/memset.c b/arch/cris/arch-v32/lib/memset.c
deleted file mode 100644
index c94ea9b3ec29..000000000000
--- a/arch/cris/arch-v32/lib/memset.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/* A memset for CRIS.
- Copyright (C) 1999-2005 Axis Communications.
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- 2. Neither the name of Axis Communications nor the names of its
- contributors may be used to endorse or promote products derived
- from this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY AXIS COMMUNICATIONS AND ITS CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AXIS
- COMMUNICATIONS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE. */
-
-/* FIXME: This file should really only be used for reference, as the
- result is somewhat depending on gcc generating what we expect rather
- than what we describe. An assembly file should be used instead. */
-
-/* Note the multiple occurrence of the expression "12*4", including the
- asm. It is hard to get it into the asm in a good way. Thus better to
- expose the problem everywhere: no macro. */
-
-/* Assuming one cycle per dword written or read (ok, not really true; the
- world is not ideal), and one cycle per instruction, then 43+3*(n/48-1)
- <= 24+24*(n/48-1) so n >= 45.7; n >= 0.9; we win on the first full
- 48-byte block to set. */
-
-#define MEMSET_BY_BLOCK_THRESHOLD (1 * 48)
-
-/* No name ambiguities in this file. */
-__asm__ (".syntax no_register_prefix");
-
-void *memset(void *pdst, int c, unsigned int plen)
-{
- /* Now we want the parameters in special registers. Make sure the
- compiler does something usable with this. */
-
- register char *return_dst __asm__ ("r10") = pdst;
- register int n __asm__ ("r12") = plen;
- register int lc __asm__ ("r11") = c;
-
- /* Most apps use memset sanely. Memsetting about 3..4 bytes or less get
- penalized here compared to the generic implementation. */
-
- /* This is fragile performancewise at best. Check with newer GCC
- releases, if they compile cascaded "x |= x << 8" to sane code. */
- __asm__("movu.b %0,r13 \n\
- lslq 8,r13 \n\
- move.b %0,r13 \n\
- move.d r13,%0 \n\
- lslq 16,r13 \n\
- or.d r13,%0"
- : "=r" (lc) /* Inputs. */
- : "0" (lc) /* Outputs. */
- : "r13"); /* Trash. */
-
- {
- register char *dst __asm__ ("r13") = pdst;
-
- if (((unsigned long) pdst & 3) != 0
- /* Oops! n = 0 must be a valid call, regardless of alignment. */
- && n >= 3)
- {
- if ((unsigned long) dst & 1)
- {
- *dst = (char) lc;
- n--;
- dst++;
- }
-
- if ((unsigned long) dst & 2)
- {
- *(short *) dst = lc;
- n -= 2;
- dst += 2;
- }
- }
-
- /* Decide which setting method to use. */
- if (n >= MEMSET_BY_BLOCK_THRESHOLD)
- {
- /* It is not optimal to tell the compiler about clobbering any
- registers; that will move the saving/restoring of those registers
- to the function prologue/epilogue, and make non-block sizes
- suboptimal. */
- __asm__ volatile
- ("\
- ;; GCC does promise correct register allocations, but let's \n\
- ;; make sure it keeps its promises. \n\
- .ifnc %0-%1-%4,$r13-$r12-$r11 \n\
- .error \"GCC reg alloc bug: %0-%1-%4 != $r13-$r12-$r11\" \n\
- .endif \n\
- \n\
- ;; Save the registers we'll clobber in the movem process \n\
- ;; on the stack. Don't mention them to gcc, it will only be \n\
- ;; upset. \n\
- subq 11*4,sp \n\
- movem r10,[sp] \n\
- \n\
- move.d r11,r0 \n\
- move.d r11,r1 \n\
- move.d r11,r2 \n\
- move.d r11,r3 \n\
- move.d r11,r4 \n\
- move.d r11,r5 \n\
- move.d r11,r6 \n\
- move.d r11,r7 \n\
- move.d r11,r8 \n\
- move.d r11,r9 \n\
- move.d r11,r10 \n\
- \n\
- ;; Now we've got this: \n\
- ;; r13 - dst \n\
- ;; r12 - n \n\
- \n\
- ;; Update n for the first loop \n\
- subq 12*4,r12 \n\
-0: \n\
-"
-#ifdef __arch_common_v10_v32
- /* Cater to branch offset difference between v32 and v10. We
- assume the branch below has an 8-bit offset. */
-" setf\n"
-#endif
-" subq 12*4,r12 \n\
- bge 0b \n\
- movem r11,[r13+] \n\
- \n\
- ;; Compensate for last loop underflowing n. \n\
- addq 12*4,r12 \n\
- \n\
- ;; Restore registers from stack. \n\
- movem [sp+],r10"
-
- /* Outputs. */
- : "=r" (dst), "=r" (n)
-
- /* Inputs. */
- : "0" (dst), "1" (n), "r" (lc));
- }
-
- /* An ad-hoc unroll, used for 4*12-1..16 bytes. */
- while (n >= 16)
- {
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- n -= 16;
- }
-
- switch (n)
- {
- case 0:
- break;
-
- case 1:
- *dst = (char) lc;
- break;
-
- case 2:
- *(short *) dst = (short) lc;
- break;
-
- case 3:
- *(short *) dst = (short) lc; dst += 2;
- *dst = (char) lc;
- break;
-
- case 4:
- *(long *) dst = lc;
- break;
-
- case 5:
- *(long *) dst = lc; dst += 4;
- *dst = (char) lc;
- break;
-
- case 6:
- *(long *) dst = lc; dst += 4;
- *(short *) dst = (short) lc;
- break;
-
- case 7:
- *(long *) dst = lc; dst += 4;
- *(short *) dst = (short) lc; dst += 2;
- *dst = (char) lc;
- break;
-
- case 8:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc;
- break;
-
- case 9:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *dst = (char) lc;
- break;
-
- case 10:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(short *) dst = (short) lc;
- break;
-
- case 11:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(short *) dst = (short) lc; dst += 2;
- *dst = (char) lc;
- break;
-
- case 12:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc;
- break;
-
- case 13:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *dst = (char) lc;
- break;
-
- case 14:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(short *) dst = (short) lc;
- break;
-
- case 15:
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(long *) dst = lc; dst += 4;
- *(short *) dst = (short) lc; dst += 2;
- *dst = (char) lc;
- break;
- }
- }
-
- return return_dst;
-}
diff --git a/arch/cris/arch-v32/lib/strcmp.S b/arch/cris/arch-v32/lib/strcmp.S
deleted file mode 100644
index 8f7a1ee62591..000000000000
--- a/arch/cris/arch-v32/lib/strcmp.S
+++ /dev/null
@@ -1,21 +0,0 @@
-; strcmp.S -- CRISv32 version.
-; Copyright (C) 2008 AXIS Communications AB
-; Written by Edgar E. Iglesias
-;
-; This source code is licensed under the GNU General Public License,
-; Version 2. See the file COPYING for more details.
-
- .global strcmp
- .type strcmp,@function
-strcmp:
-1:
- move.b [$r10+], $r12
- seq $r13
- sub.b [$r11+], $r12
- or.b $r12, $r13
- beq 1b
- nop
-
- ret
- movs.b $r12, $r10
- .size strcmp, . - strcmp
diff --git a/arch/cris/arch-v32/lib/string.c b/arch/cris/arch-v32/lib/string.c
deleted file mode 100644
index c7bd6ebdc93c..000000000000
--- a/arch/cris/arch-v32/lib/string.c
+++ /dev/null
@@ -1,236 +0,0 @@
-/* A memcpy for CRIS.
- Copyright (C) 1994-2005 Axis Communications.
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- 2. Neither the name of Axis Communications nor the names of its
- contributors may be used to endorse or promote products derived
- from this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY AXIS COMMUNICATIONS AND ITS CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AXIS
- COMMUNICATIONS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE. */
-
-/* FIXME: This file should really only be used for reference, as the
- result is somewhat depending on gcc generating what we expect rather
- than what we describe. An assembly file should be used instead. */
-
-#include <stddef.h>
-
-/* Break even between movem and move16 is really at 38.7 * 2, but
- modulo 44, so up to the next multiple of 44, we use ordinary code. */
-#define MEMCPY_BY_BLOCK_THRESHOLD (44 * 2)
-
-/* No name ambiguities in this file. */
-__asm__ (".syntax no_register_prefix");
-
-void *
-memcpy(void *pdst, const void *psrc, size_t pn)
-{
- /* Now we want the parameters put in special registers.
- Make sure the compiler is able to make something useful of this.
- As it is now: r10 -> r13; r11 -> r11 (nop); r12 -> r12 (nop).
-
- If gcc was allright, it really would need no temporaries, and no
- stack space to save stuff on. */
-
- register void *return_dst __asm__ ("r10") = pdst;
- register unsigned char *dst __asm__ ("r13") = pdst;
- register unsigned const char *src __asm__ ("r11") = psrc;
- register int n __asm__ ("r12") = pn;
-
- /* When src is aligned but not dst, this makes a few extra needless
- cycles. I believe it would take as many to check that the
- re-alignment was unnecessary. */
- if (((unsigned long) dst & 3) != 0
- /* Don't align if we wouldn't copy more than a few bytes; so we
- don't have to check further for overflows. */
- && n >= 3)
- {
- if ((unsigned long) dst & 1)
- {
- n--;
- *dst = *src;
- src++;
- dst++;
- }
-
- if ((unsigned long) dst & 2)
- {
- n -= 2;
- *(short *) dst = *(short *) src;
- src += 2;
- dst += 2;
- }
- }
-
- /* Decide which copying method to use. */
- if (n >= MEMCPY_BY_BLOCK_THRESHOLD)
- {
- /* It is not optimal to tell the compiler about clobbering any
- registers; that will move the saving/restoring of those registers
- to the function prologue/epilogue, and make non-movem sizes
- suboptimal. */
- __asm__ volatile
- ("\
- ;; GCC does promise correct register allocations, but let's \n\
- ;; make sure it keeps its promises. \n\
- .ifnc %0-%1-%2,$r13-$r11-$r12 \n\
- .error \"GCC reg alloc bug: %0-%1-%4 != $r13-$r12-$r11\" \n\
- .endif \n\
- \n\
- ;; Save the registers we'll use in the movem process \n\
- ;; on the stack. \n\
- subq 11*4,sp \n\
- movem r10,[sp] \n\
- \n\
- ;; Now we've got this: \n\
- ;; r11 - src \n\
- ;; r13 - dst \n\
- ;; r12 - n \n\
- \n\
- ;; Update n for the first loop. \n\
- subq 44,r12 \n\
-0: \n\
-"
-#ifdef __arch_common_v10_v32
- /* Cater to branch offset difference between v32 and v10. We
- assume the branch below has an 8-bit offset. */
-" setf\n"
-#endif
-" movem [r11+],r10 \n\
- subq 44,r12 \n\
- bge 0b \n\
- movem r10,[r13+] \n\
- \n\
- ;; Compensate for last loop underflowing n. \n\
- addq 44,r12 \n\
- \n\
- ;; Restore registers from stack. \n\
- movem [sp+],r10"
-
- /* Outputs. */
- : "=r" (dst), "=r" (src), "=r" (n)
-
- /* Inputs. */
- : "0" (dst), "1" (src), "2" (n));
- }
-
- while (n >= 16)
- {
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
-
- n -= 16;
- }
-
- switch (n)
- {
- case 0:
- break;
-
- case 1:
- *dst = *src;
- break;
-
- case 2:
- *(short *) dst = *(short *) src;
- break;
-
- case 3:
- *(short *) dst = *(short *) src; dst += 2; src += 2;
- *dst = *src;
- break;
-
- case 4:
- *(long *) dst = *(long *) src;
- break;
-
- case 5:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *dst = *src;
- break;
-
- case 6:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(short *) dst = *(short *) src;
- break;
-
- case 7:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(short *) dst = *(short *) src; dst += 2; src += 2;
- *dst = *src;
- break;
-
- case 8:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src;
- break;
-
- case 9:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *dst = *src;
- break;
-
- case 10:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(short *) dst = *(short *) src;
- break;
-
- case 11:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(short *) dst = *(short *) src; dst += 2; src += 2;
- *dst = *src;
- break;
-
- case 12:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src;
- break;
-
- case 13:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *dst = *src;
- break;
-
- case 14:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(short *) dst = *(short *) src;
- break;
-
- case 15:
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(long *) dst = *(long *) src; dst += 4; src += 4;
- *(short *) dst = *(short *) src; dst += 2; src += 2;
- *dst = *src;
- break;
- }
-
- return return_dst;
-}
diff --git a/arch/cris/arch-v32/lib/usercopy.c b/arch/cris/arch-v32/lib/usercopy.c
deleted file mode 100644
index 04e78b6ffa22..000000000000
--- a/arch/cris/arch-v32/lib/usercopy.c
+++ /dev/null
@@ -1,458 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * User address space access functions.
- * The non-inlined parts of asm-cris/uaccess.h are here.
- *
- * Copyright (C) 2000, 2003 Axis Communications AB.
- *
- * Written by Hans-Peter Nilsson.
- * Pieces used from memcpy, originally by Kenny Ranerup long time ago.
- */
-
-#include <linux/uaccess.h>
-
-/* Asm:s have been tweaked (within the domain of correctness) to give
- satisfactory results for "gcc version 3.2.1 Axis release R53/1.53-v32".
-
- Check regularly...
-
- Note that for CRISv32, the PC saved at a bus-fault is the address
- *at* the faulting instruction, with a special case for instructions
- in delay slots: then it's the address of the branch. Note also that
- in contrast to v10, a postincrement in the instruction is *not*
- performed at a bus-fault; the register is seen having the original
- value in fault handlers. */
-
-
-/* Copy to userspace. This is based on the memcpy used for
- kernel-to-kernel copying; see "string.c". */
-
-unsigned long __copy_user(void __user *pdst, const void *psrc, unsigned long pn)
-{
- /* We want the parameters put in special registers.
- Make sure the compiler is able to make something useful of this.
- As it is now: r10 -> r13; r11 -> r11 (nop); r12 -> r12 (nop).
-
- FIXME: Comment for old gcc version. Check.
- If gcc was alright, it really would need no temporaries, and no
- stack space to save stuff on. */
-
- register char *dst __asm__ ("r13") = pdst;
- register const char *src __asm__ ("r11") = psrc;
- register int n __asm__ ("r12") = pn;
- register int retn __asm__ ("r10") = 0;
-
-
- /* When src is aligned but not dst, this makes a few extra needless
- cycles. I believe it would take as many to check that the
- re-alignment was unnecessary. */
- if (((unsigned long) dst & 3) != 0
- /* Don't align if we wouldn't copy more than a few bytes; so we
- don't have to check further for overflows. */
- && n >= 3)
- {
- if ((unsigned long) dst & 1)
- {
- __asm_copy_to_user_1 (dst, src, retn);
- n--;
- }
-
- if ((unsigned long) dst & 2)
- {
- __asm_copy_to_user_2 (dst, src, retn);
- n -= 2;
- }
- }
-
- /* Movem is dirt cheap. The overheap is low enough to always use the
- minimum possible block size as the threshold. */
- if (n >= 44)
- {
- /* For large copies we use 'movem'. */
-
- /* It is not optimal to tell the compiler about clobbering any
- registers; that will move the saving/restoring of those registers
- to the function prologue/epilogue, and make non-movem sizes
- suboptimal. */
- __asm__ volatile ("\
- ;; Check that the register asm declaration got right. \n\
- ;; The GCC manual explicitly says TRT will happen. \n\
- .ifnc %0%1%2%3,$r13$r11$r12$r10 \n\
- .err \n\
- .endif \n\
- \n\
- ;; Save the registers we'll use in the movem process \n\
- ;; on the stack. \n\
- subq 11*4,$sp \n\
- movem $r10,[$sp] \n\
- \n\
- ;; Now we've got this: \n\
- ;; r11 - src \n\
- ;; r13 - dst \n\
- ;; r12 - n \n\
- \n\
- ;; Update n for the first loop \n\
- subq 44,$r12 \n\
-0: \n\
- movem [$r11+],$r10 \n\
- subq 44,$r12 \n\
-1: bge 0b \n\
- movem $r10,[$r13+] \n\
-3: \n\
- addq 44,$r12 ;; compensate for last loop underflowing n \n\
- \n\
- ;; Restore registers from stack \n\
- movem [$sp+],$r10 \n\
-2: \n\
- .section .fixup,\"ax\" \n\
-4: \n\
-; When failing on any of the 1..44 bytes in a chunk, we adjust back the \n\
-; source pointer and just drop through to the by-16 and by-4 loops to \n\
-; get the correct number of failing bytes. This necessarily means a \n\
-; few extra exceptions, but invalid user pointers shouldn't happen in \n\
-; time-critical code anyway. \n\
- jump 3b \n\
- subq 44,$r11 \n\
- \n\
- .previous \n\
- .section __ex_table,\"a\" \n\
- .dword 1b,4b \n\
- .previous"
-
- /* Outputs */ : "=r" (dst), "=r" (src), "=r" (n), "=r" (retn)
- /* Inputs */ : "0" (dst), "1" (src), "2" (n), "3" (retn));
-
- }
-
- while (n >= 16)
- {
- __asm_copy_to_user_16 (dst, src, retn);
- n -= 16;
- }
-
- /* Having a separate by-four loops cuts down on cache footprint.
- FIXME: Test with and without; increasing switch to be 0..15. */
- while (n >= 4)
- {
- __asm_copy_to_user_4 (dst, src, retn);
- n -= 4;
- }
-
- switch (n)
- {
- case 0:
- break;
- case 1:
- __asm_copy_to_user_1 (dst, src, retn);
- break;
- case 2:
- __asm_copy_to_user_2 (dst, src, retn);
- break;
- case 3:
- __asm_copy_to_user_3 (dst, src, retn);
- break;
- }
-
- return retn;
-}
-EXPORT_SYMBOL(__copy_user);
-
-/* Copy from user to kernel. The return-value is the number of bytes that were
- inaccessible. */
-unsigned long __copy_user_in(void *pdst, const void __user *psrc,
- unsigned long pn)
-{
- /* We want the parameters put in special registers.
- Make sure the compiler is able to make something useful of this.
- As it is now: r10 -> r13; r11 -> r11 (nop); r12 -> r12 (nop).
-
- FIXME: Comment for old gcc version. Check.
- If gcc was alright, it really would need no temporaries, and no
- stack space to save stuff on. */
-
- register char *dst __asm__ ("r13") = pdst;
- register const char *src __asm__ ("r11") = psrc;
- register int n __asm__ ("r12") = pn;
- register int retn __asm__ ("r10") = 0;
-
- /* The best reason to align src is that we then know that a read-fault
- was for aligned bytes; there's no 1..3 remaining good bytes to
- pickle. */
- if (((unsigned long) src & 3) != 0)
- {
- if (((unsigned long) src & 1) && n != 0)
- {
- __asm_copy_from_user_1 (dst, src, retn);
- n--;
- if (retn != 0)
- goto exception;
- }
-
- if (((unsigned long) src & 2) && n >= 2)
- {
- __asm_copy_from_user_2 (dst, src, retn);
- n -= 2;
- if (retn != 0)
- goto exception;
- }
-
- }
-
- /* Movem is dirt cheap. The overheap is low enough to always use the
- minimum possible block size as the threshold. */
- if (n >= 44)
- {
- /* It is not optimal to tell the compiler about clobbering any
- registers; that will move the saving/restoring of those registers
- to the function prologue/epilogue, and make non-movem sizes
- suboptimal. */
- __asm__ volatile ("\
- .ifnc %0%1%2%3,$r13$r11$r12$r10 \n\
- .err \n\
- .endif \n\
- \n\
- ;; Save the registers we'll use in the movem process \n\
- ;; on the stack. \n\
- subq 11*4,$sp \n\
- movem $r10,[$sp] \n\
- \n\
- ;; Now we've got this: \n\
- ;; r11 - src \n\
- ;; r13 - dst \n\
- ;; r12 - n \n\
- \n\
- ;; Update n for the first loop \n\
- subq 44,$r12 \n\
-0: \n\
- movem [$r11+],$r10 \n\
- \n\
- subq 44,$r12 \n\
- bge 0b \n\
- movem $r10,[$r13+] \n\
- \n\
-4: \n\
- addq 44,$r12 ;; compensate for last loop underflowing n \n\
- \n\
- ;; Restore registers from stack \n\
- movem [$sp+],$r10 \n\
- .section .fixup,\"ax\" \n\
- \n\
-;; Do not jump back into the loop if we fail. For some uses, we get a \n\
-;; page fault somewhere on the line. Without checking for page limits, \n\
-;; we don't know where, but we need to copy accurately and keep an \n\
-;; accurate count; not just clear the whole line. To do that, we fall \n\
-;; down in the code below, proceeding with smaller amounts. It should \n\
-;; be kept in mind that we have to cater to code like what at one time \n\
-;; was in fs/super.c: \n\
-;; i = size - copy_from_user((void *)page, data, size); \n\
-;; which would cause repeated faults while clearing the remainder of \n\
-;; the SIZE bytes at PAGE after the first fault. \n\
-;; A caveat here is that we must not fall through from a failing page \n\
-;; to a valid page. \n\
- \n\
-3: \n\
- jump 4b ;; Fall through, pretending the fault didn't happen. \n\
- nop \n\
- \n\
- .previous \n\
- .section __ex_table,\"a\" \n\
- .dword 0b,3b \n\
- .previous"
-
- /* Outputs */ : "=r" (dst), "=r" (src), "=r" (n), "=r" (retn)
- /* Inputs */ : "0" (dst), "1" (src), "2" (n), "3" (retn));
- }
-
- /* Either we directly start copying here, using dword copying in a loop,
- or we copy as much as possible with 'movem' and then the last block
- (<44 bytes) is copied here. This will work since 'movem' will have
- updated src, dst and n. (Except with failing src.)
-
- Since we want to keep src accurate, we can't use
- __asm_copy_from_user_N with N != (1, 2, 4); it updates dst and
- retn, but not src (by design; it's value is ignored elsewhere). */
-
- while (n >= 4)
- {
- __asm_copy_from_user_4 (dst, src, retn);
- n -= 4;
-
- if (retn)
- goto exception;
- }
-
- /* If we get here, there were no memory read faults. */
- switch (n)
- {
- /* These copies are at least "naturally aligned" (so we don't have
- to check each byte), due to the src alignment code before the
- movem loop. The *_3 case *will* get the correct count for retn. */
- case 0:
- /* This case deliberately left in (if you have doubts check the
- generated assembly code). */
- break;
- case 1:
- __asm_copy_from_user_1 (dst, src, retn);
- break;
- case 2:
- __asm_copy_from_user_2 (dst, src, retn);
- break;
- case 3:
- __asm_copy_from_user_3 (dst, src, retn);
- break;
- }
-
- /* If we get here, retn correctly reflects the number of failing
- bytes. */
- return retn;
-
-exception:
- return retn + n;
-}
-EXPORT_SYMBOL(__copy_user_in);
-
-/* Zero userspace. */
-unsigned long __do_clear_user(void __user *pto, unsigned long pn)
-{
- /* We want the parameters put in special registers.
- Make sure the compiler is able to make something useful of this.
- As it is now: r10 -> r13; r11 -> r11 (nop); r12 -> r12 (nop).
-
- FIXME: Comment for old gcc version. Check.
- If gcc was alright, it really would need no temporaries, and no
- stack space to save stuff on. */
-
- register char *dst __asm__ ("r13") = pto;
- register int n __asm__ ("r12") = pn;
- register int retn __asm__ ("r10") = 0;
-
-
- if (((unsigned long) dst & 3) != 0
- /* Don't align if we wouldn't copy more than a few bytes. */
- && n >= 3)
- {
- if ((unsigned long) dst & 1)
- {
- __asm_clear_1 (dst, retn);
- n--;
- }
-
- if ((unsigned long) dst & 2)
- {
- __asm_clear_2 (dst, retn);
- n -= 2;
- }
- }
-
- /* Decide which copying method to use.
- FIXME: This number is from the "ordinary" kernel memset. */
- if (n >= 48)
- {
- /* For large clears we use 'movem' */
-
- /* It is not optimal to tell the compiler about clobbering any
- call-saved registers; that will move the saving/restoring of
- those registers to the function prologue/epilogue, and make
- non-movem sizes suboptimal.
-
- This method is not foolproof; it assumes that the "asm reg"
- declarations at the beginning of the function really are used
- here (beware: they may be moved to temporary registers).
- This way, we do not have to save/move the registers around into
- temporaries; we can safely use them straight away.
-
- If you want to check that the allocation was right; then
- check the equalities in the first comment. It should say
- something like "r13=r13, r11=r11, r12=r12". */
- __asm__ volatile ("\
- .ifnc %0%1%2,$r13$r12$r10 \n\
- .err \n\
- .endif \n\
- \n\
- ;; Save the registers we'll clobber in the movem process \n\
- ;; on the stack. Don't mention them to gcc, it will only be \n\
- ;; upset. \n\
- subq 11*4,$sp \n\
- movem $r10,[$sp] \n\
- \n\
- clear.d $r0 \n\
- clear.d $r1 \n\
- clear.d $r2 \n\
- clear.d $r3 \n\
- clear.d $r4 \n\
- clear.d $r5 \n\
- clear.d $r6 \n\
- clear.d $r7 \n\
- clear.d $r8 \n\
- clear.d $r9 \n\
- clear.d $r10 \n\
- clear.d $r11 \n\
- \n\
- ;; Now we've got this: \n\
- ;; r13 - dst \n\
- ;; r12 - n \n\
- \n\
- ;; Update n for the first loop \n\
- subq 12*4,$r12 \n\
-0: \n\
- subq 12*4,$r12 \n\
-1: \n\
- bge 0b \n\
- movem $r11,[$r13+] \n\
- \n\
- addq 12*4,$r12 ;; compensate for last loop underflowing n \n\
- \n\
- ;; Restore registers from stack \n\
- movem [$sp+],$r10 \n\
-2: \n\
- .section .fixup,\"ax\" \n\
-3: \n\
- movem [$sp],$r10 \n\
- addq 12*4,$r10 \n\
- addq 12*4,$r13 \n\
- movem $r10,[$sp] \n\
- jump 0b \n\
- clear.d $r10 \n\
- \n\
- .previous \n\
- .section __ex_table,\"a\" \n\
- .dword 1b,3b \n\
- .previous"
-
- /* Outputs */ : "=r" (dst), "=r" (n), "=r" (retn)
- /* Inputs */ : "0" (dst), "1" (n), "2" (retn)
- /* Clobber */ : "r11");
- }
-
- while (n >= 16)
- {
- __asm_clear_16 (dst, retn);
- n -= 16;
- }
-
- /* Having a separate by-four loops cuts down on cache footprint.
- FIXME: Test with and without; increasing switch to be 0..15. */
- while (n >= 4)
- {
- __asm_clear_4 (dst, retn);
- n -= 4;
- }
-
- switch (n)
- {
- case 0:
- break;
- case 1:
- __asm_clear_1 (dst, retn);
- break;
- case 2:
- __asm_clear_2 (dst, retn);
- break;
- case 3:
- __asm_clear_3 (dst, retn);
- break;
- }
-
- return retn;
-}
-EXPORT_SYMBOL(__do_clear_user);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-22 09:31:43 +0300