You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
522 lines
16 KiB
522 lines
16 KiB
/*
|
|
* Optimized memory copy routines.
|
|
*
|
|
* Copyright (C) 2004 Randolph Chung <tausq@debian.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Portions derived from the GNU C Library
|
|
* Copyright (C) 1991, 1997, 2003 Free Software Foundation, Inc.
|
|
*
|
|
* Several strategies are tried to try to get the best performance for various
|
|
* conditions. In the optimal case, we copy 64-bytes in an unrolled loop using
|
|
* fp regs. This is followed by loops that copy 32- or 16-bytes at a time using
|
|
* general registers. Unaligned copies are handled either by aligning the
|
|
* destination and then using shift-and-write method, or in a few cases by
|
|
* falling back to a byte-at-a-time copy.
|
|
*
|
|
* I chose to implement this in C because it is easier to maintain and debug,
|
|
* and in my experiments it appears that the C code generated by gcc (3.3/3.4
|
|
* at the time of writing) is fairly optimal. Unfortunately some of the
|
|
* semantics of the copy routine (exception handling) is difficult to express
|
|
* in C, so we have to play some tricks to get it to work.
|
|
*
|
|
* All the loads and stores are done via explicit asm() code in order to use
|
|
* the right space registers.
|
|
*
|
|
* Testing with various alignments and buffer sizes shows that this code is
|
|
* often >10x faster than a simple byte-at-a-time copy, even for strangely
|
|
* aligned operands. It is interesting to note that the glibc version
|
|
* of memcpy (written in C) is actually quite fast already. This routine is
|
|
* able to beat it by 30-40% for aligned copies because of the loop unrolling,
|
|
* but in some cases the glibc version is still slightly faster. This lends
|
|
* more credibility that gcc can generate very good code as long as we are
|
|
* careful.
|
|
*
|
|
* TODO:
|
|
* - cache prefetching needs more experimentation to get optimal settings
|
|
* - try not to use the post-increment address modifiers; they create additional
|
|
* interlocks
|
|
* - replace byte-copy loops with stybs sequences
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/compiler.h>
|
|
#include <asm/uaccess.h>
|
|
#define s_space "%%sr1"
|
|
#define d_space "%%sr2"
|
|
#else
|
|
#include "memcpy.h"
|
|
#define s_space "%%sr0"
|
|
#define d_space "%%sr0"
|
|
#define pa_memcpy new2_copy
|
|
#endif
|
|
|
|
DECLARE_PER_CPU(struct exception_data, exception_data);
|
|
|
|
#define preserve_branch(label) do { \
|
|
volatile int dummy; \
|
|
/* The following branch is never taken, it's just here to */ \
|
|
/* prevent gcc from optimizing away our exception code. */ \
|
|
if (unlikely(dummy != dummy)) \
|
|
goto label; \
|
|
} while (0)
|
|
|
|
#define get_user_space() (segment_eq(get_fs(), KERNEL_DS) ? 0 : mfsp(3))
|
|
#define get_kernel_space() (0)
|
|
|
|
#define MERGE(w0, sh_1, w1, sh_2) ({ \
|
|
unsigned int _r; \
|
|
asm volatile ( \
|
|
"mtsar %3\n" \
|
|
"shrpw %1, %2, %%sar, %0\n" \
|
|
: "=r"(_r) \
|
|
: "r"(w0), "r"(w1), "r"(sh_2) \
|
|
); \
|
|
_r; \
|
|
})
|
|
#define THRESHOLD 16
|
|
|
|
#ifdef DEBUG_MEMCPY
|
|
#define DPRINTF(fmt, args...) do { printk(KERN_DEBUG "%s:%d:%s ", __FILE__, __LINE__, __FUNCTION__ ); printk(KERN_DEBUG fmt, ##args ); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, args...)
|
|
#endif
|
|
|
|
#ifndef __LP64__
|
|
#define EXC_WORD ".word"
|
|
#else
|
|
#define EXC_WORD ".dword"
|
|
#endif
|
|
|
|
#define def_load_ai_insn(_insn,_sz,_tt,_s,_a,_t,_e) \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t" #_insn ",ma " #_sz "(" _s ",%1), %0\n" \
|
|
"\t.section __ex_table,\"aw\"\n" \
|
|
"\t" EXC_WORD "\t1b\n" \
|
|
"\t" EXC_WORD "\t" #_e "\n" \
|
|
"\t.previous\n" \
|
|
: _tt(_t), "+r"(_a) \
|
|
: \
|
|
: "r8")
|
|
|
|
#define def_store_ai_insn(_insn,_sz,_tt,_s,_a,_t,_e) \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t" #_insn ",ma %1, " #_sz "(" _s ",%0)\n" \
|
|
"\t.section __ex_table,\"aw\"\n" \
|
|
"\t" EXC_WORD "\t1b\n" \
|
|
"\t" EXC_WORD "\t" #_e "\n" \
|
|
"\t.previous\n" \
|
|
: "+r"(_a) \
|
|
: _tt(_t) \
|
|
: "r8")
|
|
|
|
#define ldbma(_s, _a, _t, _e) def_load_ai_insn(ldbs,1,"=r",_s,_a,_t,_e)
|
|
#define stbma(_s, _t, _a, _e) def_store_ai_insn(stbs,1,"r",_s,_a,_t,_e)
|
|
#define ldwma(_s, _a, _t, _e) def_load_ai_insn(ldw,4,"=r",_s,_a,_t,_e)
|
|
#define stwma(_s, _t, _a, _e) def_store_ai_insn(stw,4,"r",_s,_a,_t,_e)
|
|
#define flddma(_s, _a, _t, _e) def_load_ai_insn(fldd,8,"=f",_s,_a,_t,_e)
|
|
#define fstdma(_s, _t, _a, _e) def_store_ai_insn(fstd,8,"f",_s,_a,_t,_e)
|
|
|
|
#define def_load_insn(_insn,_tt,_s,_o,_a,_t,_e) \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t" #_insn " " #_o "(" _s ",%1), %0\n" \
|
|
"\t.section __ex_table,\"aw\"\n" \
|
|
"\t" EXC_WORD "\t1b\n" \
|
|
"\t" EXC_WORD "\t" #_e "\n" \
|
|
"\t.previous\n" \
|
|
: _tt(_t) \
|
|
: "r"(_a) \
|
|
: "r8")
|
|
|
|
#define def_store_insn(_insn,_tt,_s,_t,_o,_a,_e) \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t" #_insn " %0, " #_o "(" _s ",%1)\n" \
|
|
"\t.section __ex_table,\"aw\"\n" \
|
|
"\t" EXC_WORD "\t1b\n" \
|
|
"\t" EXC_WORD "\t" #_e "\n" \
|
|
"\t.previous\n" \
|
|
: \
|
|
: _tt(_t), "r"(_a) \
|
|
: "r8")
|
|
|
|
#define ldw(_s,_o,_a,_t,_e) def_load_insn(ldw,"=r",_s,_o,_a,_t,_e)
|
|
#define stw(_s,_t,_o,_a,_e) def_store_insn(stw,"r",_s,_t,_o,_a,_e)
|
|
|
|
#ifdef CONFIG_PREFETCH
|
|
extern inline void prefetch_src(const void *addr)
|
|
{
|
|
__asm__("ldw 0(" s_space ",%0), %%r0" : : "r" (addr));
|
|
}
|
|
|
|
extern inline void prefetch_dst(const void *addr)
|
|
{
|
|
__asm__("ldd 0(" d_space ",%0), %%r0" : : "r" (addr));
|
|
}
|
|
#else
|
|
#define prefetch_src(addr)
|
|
#define prefetch_dst(addr)
|
|
#endif
|
|
|
|
/* Copy from a not-aligned src to an aligned dst, using shifts. Handles 4 words
|
|
* per loop. This code is derived from glibc.
|
|
*/
|
|
static inline unsigned long copy_dstaligned(unsigned long dst, unsigned long src, unsigned long len, unsigned long o_dst, unsigned long o_src, unsigned long o_len)
|
|
{
|
|
/* gcc complains that a2 and a3 may be uninitialized, but actually
|
|
* they cannot be. Initialize a2/a3 to shut gcc up.
|
|
*/
|
|
register unsigned int a0, a1, a2 = 0, a3 = 0;
|
|
int sh_1, sh_2;
|
|
struct exception_data *d;
|
|
|
|
/* prefetch_src((const void *)src); */
|
|
|
|
/* Calculate how to shift a word read at the memory operation
|
|
aligned srcp to make it aligned for copy. */
|
|
sh_1 = 8 * (src % sizeof(unsigned int));
|
|
sh_2 = 8 * sizeof(unsigned int) - sh_1;
|
|
|
|
/* Make src aligned by rounding it down. */
|
|
src &= -sizeof(unsigned int);
|
|
|
|
switch (len % 4)
|
|
{
|
|
case 2:
|
|
/* a1 = ((unsigned int *) src)[0];
|
|
a2 = ((unsigned int *) src)[1]; */
|
|
ldw(s_space, 0, src, a1, cda_ldw_exc);
|
|
ldw(s_space, 4, src, a2, cda_ldw_exc);
|
|
src -= 1 * sizeof(unsigned int);
|
|
dst -= 3 * sizeof(unsigned int);
|
|
len += 2;
|
|
goto do1;
|
|
case 3:
|
|
/* a0 = ((unsigned int *) src)[0];
|
|
a1 = ((unsigned int *) src)[1]; */
|
|
ldw(s_space, 0, src, a0, cda_ldw_exc);
|
|
ldw(s_space, 4, src, a1, cda_ldw_exc);
|
|
src -= 0 * sizeof(unsigned int);
|
|
dst -= 2 * sizeof(unsigned int);
|
|
len += 1;
|
|
goto do2;
|
|
case 0:
|
|
if (len == 0)
|
|
return 0;
|
|
/* a3 = ((unsigned int *) src)[0];
|
|
a0 = ((unsigned int *) src)[1]; */
|
|
ldw(s_space, 0, src, a3, cda_ldw_exc);
|
|
ldw(s_space, 4, src, a0, cda_ldw_exc);
|
|
src -=-1 * sizeof(unsigned int);
|
|
dst -= 1 * sizeof(unsigned int);
|
|
len += 0;
|
|
goto do3;
|
|
case 1:
|
|
/* a2 = ((unsigned int *) src)[0];
|
|
a3 = ((unsigned int *) src)[1]; */
|
|
ldw(s_space, 0, src, a2, cda_ldw_exc);
|
|
ldw(s_space, 4, src, a3, cda_ldw_exc);
|
|
src -=-2 * sizeof(unsigned int);
|
|
dst -= 0 * sizeof(unsigned int);
|
|
len -= 1;
|
|
if (len == 0)
|
|
goto do0;
|
|
goto do4; /* No-op. */
|
|
}
|
|
|
|
do
|
|
{
|
|
/* prefetch_src((const void *)(src + 4 * sizeof(unsigned int))); */
|
|
do4:
|
|
/* a0 = ((unsigned int *) src)[0]; */
|
|
ldw(s_space, 0, src, a0, cda_ldw_exc);
|
|
/* ((unsigned int *) dst)[0] = MERGE (a2, sh_1, a3, sh_2); */
|
|
stw(d_space, MERGE (a2, sh_1, a3, sh_2), 0, dst, cda_stw_exc);
|
|
do3:
|
|
/* a1 = ((unsigned int *) src)[1]; */
|
|
ldw(s_space, 4, src, a1, cda_ldw_exc);
|
|
/* ((unsigned int *) dst)[1] = MERGE (a3, sh_1, a0, sh_2); */
|
|
stw(d_space, MERGE (a3, sh_1, a0, sh_2), 4, dst, cda_stw_exc);
|
|
do2:
|
|
/* a2 = ((unsigned int *) src)[2]; */
|
|
ldw(s_space, 8, src, a2, cda_ldw_exc);
|
|
/* ((unsigned int *) dst)[2] = MERGE (a0, sh_1, a1, sh_2); */
|
|
stw(d_space, MERGE (a0, sh_1, a1, sh_2), 8, dst, cda_stw_exc);
|
|
do1:
|
|
/* a3 = ((unsigned int *) src)[3]; */
|
|
ldw(s_space, 12, src, a3, cda_ldw_exc);
|
|
/* ((unsigned int *) dst)[3] = MERGE (a1, sh_1, a2, sh_2); */
|
|
stw(d_space, MERGE (a1, sh_1, a2, sh_2), 12, dst, cda_stw_exc);
|
|
|
|
src += 4 * sizeof(unsigned int);
|
|
dst += 4 * sizeof(unsigned int);
|
|
len -= 4;
|
|
}
|
|
while (len != 0);
|
|
|
|
do0:
|
|
/* ((unsigned int *) dst)[0] = MERGE (a2, sh_1, a3, sh_2); */
|
|
stw(d_space, MERGE (a2, sh_1, a3, sh_2), 0, dst, cda_stw_exc);
|
|
|
|
preserve_branch(handle_load_error);
|
|
preserve_branch(handle_store_error);
|
|
|
|
return 0;
|
|
|
|
handle_load_error:
|
|
__asm__ __volatile__ ("cda_ldw_exc:\n");
|
|
d = &__get_cpu_var(exception_data);
|
|
DPRINTF("cda_ldw_exc: o_len=%lu fault_addr=%lu o_src=%lu ret=%lu\n",
|
|
o_len, d->fault_addr, o_src, o_len - d->fault_addr + o_src);
|
|
return o_len * 4 - d->fault_addr + o_src;
|
|
|
|
handle_store_error:
|
|
__asm__ __volatile__ ("cda_stw_exc:\n");
|
|
d = &__get_cpu_var(exception_data);
|
|
DPRINTF("cda_stw_exc: o_len=%lu fault_addr=%lu o_dst=%lu ret=%lu\n",
|
|
o_len, d->fault_addr, o_dst, o_len - d->fault_addr + o_dst);
|
|
return o_len * 4 - d->fault_addr + o_dst;
|
|
}
|
|
|
|
|
|
/* Returns 0 for success, otherwise, returns number of bytes not transferred. */
|
|
unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
|
|
{
|
|
register unsigned long src, dst, t1, t2, t3;
|
|
register unsigned char *pcs, *pcd;
|
|
register unsigned int *pws, *pwd;
|
|
register double *pds, *pdd;
|
|
unsigned long ret = 0;
|
|
unsigned long o_dst, o_src, o_len;
|
|
struct exception_data *d;
|
|
|
|
src = (unsigned long)srcp;
|
|
dst = (unsigned long)dstp;
|
|
pcs = (unsigned char *)srcp;
|
|
pcd = (unsigned char *)dstp;
|
|
|
|
o_dst = dst; o_src = src; o_len = len;
|
|
|
|
/* prefetch_src((const void *)srcp); */
|
|
|
|
if (len < THRESHOLD)
|
|
goto byte_copy;
|
|
|
|
/* Check alignment */
|
|
t1 = (src ^ dst);
|
|
if (unlikely(t1 & (sizeof(double)-1)))
|
|
goto unaligned_copy;
|
|
|
|
/* src and dst have same alignment. */
|
|
|
|
/* Copy bytes till we are double-aligned. */
|
|
t2 = src & (sizeof(double) - 1);
|
|
if (unlikely(t2 != 0)) {
|
|
t2 = sizeof(double) - t2;
|
|
while (t2 && len) {
|
|
/* *pcd++ = *pcs++; */
|
|
ldbma(s_space, pcs, t3, pmc_load_exc);
|
|
len--;
|
|
stbma(d_space, t3, pcd, pmc_store_exc);
|
|
t2--;
|
|
}
|
|
}
|
|
|
|
pds = (double *)pcs;
|
|
pdd = (double *)pcd;
|
|
|
|
/* Copy 8 doubles at a time */
|
|
while (len >= 8*sizeof(double)) {
|
|
register double r1, r2, r3, r4, r5, r6, r7, r8;
|
|
/* prefetch_src((char *)pds + L1_CACHE_BYTES); */
|
|
flddma(s_space, pds, r1, pmc_load_exc);
|
|
flddma(s_space, pds, r2, pmc_load_exc);
|
|
flddma(s_space, pds, r3, pmc_load_exc);
|
|
flddma(s_space, pds, r4, pmc_load_exc);
|
|
fstdma(d_space, r1, pdd, pmc_store_exc);
|
|
fstdma(d_space, r2, pdd, pmc_store_exc);
|
|
fstdma(d_space, r3, pdd, pmc_store_exc);
|
|
fstdma(d_space, r4, pdd, pmc_store_exc);
|
|
|
|
#if 0
|
|
if (L1_CACHE_BYTES <= 32)
|
|
prefetch_src((char *)pds + L1_CACHE_BYTES);
|
|
#endif
|
|
flddma(s_space, pds, r5, pmc_load_exc);
|
|
flddma(s_space, pds, r6, pmc_load_exc);
|
|
flddma(s_space, pds, r7, pmc_load_exc);
|
|
flddma(s_space, pds, r8, pmc_load_exc);
|
|
fstdma(d_space, r5, pdd, pmc_store_exc);
|
|
fstdma(d_space, r6, pdd, pmc_store_exc);
|
|
fstdma(d_space, r7, pdd, pmc_store_exc);
|
|
fstdma(d_space, r8, pdd, pmc_store_exc);
|
|
len -= 8*sizeof(double);
|
|
}
|
|
|
|
pws = (unsigned int *)pds;
|
|
pwd = (unsigned int *)pdd;
|
|
|
|
word_copy:
|
|
while (len >= 8*sizeof(unsigned int)) {
|
|
register unsigned int r1,r2,r3,r4,r5,r6,r7,r8;
|
|
/* prefetch_src((char *)pws + L1_CACHE_BYTES); */
|
|
ldwma(s_space, pws, r1, pmc_load_exc);
|
|
ldwma(s_space, pws, r2, pmc_load_exc);
|
|
ldwma(s_space, pws, r3, pmc_load_exc);
|
|
ldwma(s_space, pws, r4, pmc_load_exc);
|
|
stwma(d_space, r1, pwd, pmc_store_exc);
|
|
stwma(d_space, r2, pwd, pmc_store_exc);
|
|
stwma(d_space, r3, pwd, pmc_store_exc);
|
|
stwma(d_space, r4, pwd, pmc_store_exc);
|
|
|
|
ldwma(s_space, pws, r5, pmc_load_exc);
|
|
ldwma(s_space, pws, r6, pmc_load_exc);
|
|
ldwma(s_space, pws, r7, pmc_load_exc);
|
|
ldwma(s_space, pws, r8, pmc_load_exc);
|
|
stwma(d_space, r5, pwd, pmc_store_exc);
|
|
stwma(d_space, r6, pwd, pmc_store_exc);
|
|
stwma(d_space, r7, pwd, pmc_store_exc);
|
|
stwma(d_space, r8, pwd, pmc_store_exc);
|
|
len -= 8*sizeof(unsigned int);
|
|
}
|
|
|
|
while (len >= 4*sizeof(unsigned int)) {
|
|
register unsigned int r1,r2,r3,r4;
|
|
ldwma(s_space, pws, r1, pmc_load_exc);
|
|
ldwma(s_space, pws, r2, pmc_load_exc);
|
|
ldwma(s_space, pws, r3, pmc_load_exc);
|
|
ldwma(s_space, pws, r4, pmc_load_exc);
|
|
stwma(d_space, r1, pwd, pmc_store_exc);
|
|
stwma(d_space, r2, pwd, pmc_store_exc);
|
|
stwma(d_space, r3, pwd, pmc_store_exc);
|
|
stwma(d_space, r4, pwd, pmc_store_exc);
|
|
len -= 4*sizeof(unsigned int);
|
|
}
|
|
|
|
pcs = (unsigned char *)pws;
|
|
pcd = (unsigned char *)pwd;
|
|
|
|
byte_copy:
|
|
while (len) {
|
|
/* *pcd++ = *pcs++; */
|
|
ldbma(s_space, pcs, t3, pmc_load_exc);
|
|
stbma(d_space, t3, pcd, pmc_store_exc);
|
|
len--;
|
|
}
|
|
|
|
return 0;
|
|
|
|
unaligned_copy:
|
|
/* possibly we are aligned on a word, but not on a double... */
|
|
if (likely(t1 & (sizeof(unsigned int)-1)) == 0) {
|
|
t2 = src & (sizeof(unsigned int) - 1);
|
|
|
|
if (unlikely(t2 != 0)) {
|
|
t2 = sizeof(unsigned int) - t2;
|
|
while (t2) {
|
|
/* *pcd++ = *pcs++; */
|
|
ldbma(s_space, pcs, t3, pmc_load_exc);
|
|
stbma(d_space, t3, pcd, pmc_store_exc);
|
|
len--;
|
|
t2--;
|
|
}
|
|
}
|
|
|
|
pws = (unsigned int *)pcs;
|
|
pwd = (unsigned int *)pcd;
|
|
goto word_copy;
|
|
}
|
|
|
|
/* Align the destination. */
|
|
if (unlikely((dst & (sizeof(unsigned int) - 1)) != 0)) {
|
|
t2 = sizeof(unsigned int) - (dst & (sizeof(unsigned int) - 1));
|
|
while (t2) {
|
|
/* *pcd++ = *pcs++; */
|
|
ldbma(s_space, pcs, t3, pmc_load_exc);
|
|
stbma(d_space, t3, pcd, pmc_store_exc);
|
|
len--;
|
|
t2--;
|
|
}
|
|
dst = (unsigned long)pcd;
|
|
src = (unsigned long)pcs;
|
|
}
|
|
|
|
ret = copy_dstaligned(dst, src, len / sizeof(unsigned int),
|
|
o_dst, o_src, o_len);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pcs += (len & -sizeof(unsigned int));
|
|
pcd += (len & -sizeof(unsigned int));
|
|
len %= sizeof(unsigned int);
|
|
|
|
preserve_branch(handle_load_error);
|
|
preserve_branch(handle_store_error);
|
|
|
|
goto byte_copy;
|
|
|
|
handle_load_error:
|
|
__asm__ __volatile__ ("pmc_load_exc:\n");
|
|
d = &__get_cpu_var(exception_data);
|
|
DPRINTF("pmc_load_exc: o_len=%lu fault_addr=%lu o_src=%lu ret=%lu\n",
|
|
o_len, d->fault_addr, o_src, o_len - d->fault_addr + o_src);
|
|
return o_len - d->fault_addr + o_src;
|
|
|
|
handle_store_error:
|
|
__asm__ __volatile__ ("pmc_store_exc:\n");
|
|
d = &__get_cpu_var(exception_data);
|
|
DPRINTF("pmc_store_exc: o_len=%lu fault_addr=%lu o_dst=%lu ret=%lu\n",
|
|
o_len, d->fault_addr, o_dst, o_len - d->fault_addr + o_dst);
|
|
return o_len - d->fault_addr + o_dst;
|
|
}
|
|
|
|
#ifdef __KERNEL__
|
|
unsigned long copy_to_user(void __user *dst, const void *src, unsigned long len)
|
|
{
|
|
mtsp(get_kernel_space(), 1);
|
|
mtsp(get_user_space(), 2);
|
|
return pa_memcpy((void __force *)dst, src, len);
|
|
}
|
|
|
|
unsigned long copy_from_user(void *dst, const void __user *src, unsigned long len)
|
|
{
|
|
mtsp(get_user_space(), 1);
|
|
mtsp(get_kernel_space(), 2);
|
|
return pa_memcpy(dst, (void __force *)src, len);
|
|
}
|
|
|
|
unsigned long copy_in_user(void __user *dst, const void __user *src, unsigned long len)
|
|
{
|
|
mtsp(get_user_space(), 1);
|
|
mtsp(get_user_space(), 2);
|
|
return pa_memcpy((void __force *)dst, (void __force *)src, len);
|
|
}
|
|
|
|
|
|
void * memcpy(void * dst,const void *src, size_t count)
|
|
{
|
|
mtsp(get_kernel_space(), 1);
|
|
mtsp(get_kernel_space(), 2);
|
|
pa_memcpy(dst, src, count);
|
|
return dst;
|
|
}
|
|
|
|
EXPORT_SYMBOL(copy_to_user);
|
|
EXPORT_SYMBOL(copy_from_user);
|
|
EXPORT_SYMBOL(copy_in_user);
|
|
EXPORT_SYMBOL(memcpy);
|
|
#endif
|
|
|