mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0
|
|
*
|
|
* Copyright (C) 2018 Marvell International Ltd.
|
|
*/
|
|
|
|
/**
|
|
* Atomically adds a signed value to a 64 bit (aligned) memory location,
|
|
* and returns previous value.
|
|
*
|
|
* This version does not perform 'sync' operations to enforce memory
|
|
* operations. This should only be used when there are no memory operation
|
|
* ordering constraints. (This should NOT be used for reference counting -
|
|
* use the standard version instead.)
|
|
*
|
|
* @param ptr address in memory to add incr to
|
|
* @param incr amount to increment memory location by (signed)
|
|
*
|
|
* Return: Value of memory location before increment
|
|
*/
|
|
static inline s64 atomic_fetch_and_add64_nosync(s64 *ptr, s64 incr)
|
|
{
|
|
s64 result;
|
|
/* Atomic add with no ordering */
|
|
asm volatile("ldadd %x[i], %x[r], [%[b]]"
|
|
: [r] "=r" (result), "+m" (*ptr)
|
|
: [i] "r" (incr), [b] "r" (ptr)
|
|
: "memory");
|
|
return result;
|
|
}
|
|
|
|
static inline void lmt_cancel(const struct nix *nix)
|
|
{
|
|
writeq(0, nix->lmt_base + LMT_LF_LMTCANCEL());
|
|
}
|
|
|
|
static inline u64 *lmt_store_ptr(struct nix *nix)
|
|
{
|
|
return (u64 *)((u8 *)(nix->lmt_base) +
|
|
LMT_LF_LMTLINEX(0));
|
|
}
|
|
|
|
static inline s64 lmt_submit(u64 io_address)
|
|
{
|
|
s64 result = 0;
|
|
|
|
asm volatile("ldeor xzr, %x[rf],[%[rs]]"
|
|
: [rf] "=r"(result) : [rs] "r"(io_address));
|
|
return result;
|
|
}
|