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authorEddie Hung <eddie@fpgeh.com>2020-02-13 13:27:15 -0800
committerEddie Hung <eddie@fpgeh.com>2020-02-13 13:27:15 -0800
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verilog: improve specify support when not in -specify mode
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generated by cgit v1.2.3 (git 2.25.1) at 2025-12-12 15:44:44 +0000
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/* 
 * User address space access functions.
 *
 * Copyright 1997 Andi Kleen <ak@muc.de>
 * Copyright 1997 Linus Torvalds
 * Copyright 2002 Andi Kleen <ak@suse.de>
 */

#include <xen/config.h>
#include <xen/lib.h>
#include <asm/uaccess.h>

unsigned long __copy_to_user_ll(void __user *to, const void *from, unsigned n)
{
    unsigned long __d0, __d1, __d2, __n = n;

    asm volatile (
        "    cmp  $"STR(2*BYTES_PER_LONG-1)",%0\n"
        "    jbe  1f\n"
        "    mov  %1,%0\n"
        "    neg  %0\n"
        "    and  $"STR(BYTES_PER_LONG-1)",%0\n"
        "    sub  %0,%3\n"
        "4:  rep movsb\n" /* make 'to' address aligned */
        "    mov  %3,%0\n"
        "    shr  $"STR(LONG_BYTEORDER)",%0\n"