1600f1612SFelix Palmen /*-
2*4d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause
3600f1612SFelix Palmen *
4600f1612SFelix Palmen * Copyright (c) 2022 Felix Palmen
5600f1612SFelix Palmen *
6600f1612SFelix Palmen * Redistribution and use in source and binary forms, with or without
7600f1612SFelix Palmen * modification, are permitted provided that the following conditions
8600f1612SFelix Palmen * are met:
9600f1612SFelix Palmen * 1. Redistributions of source code must retain the above copyright
10600f1612SFelix Palmen * notice, this list of conditions and the following disclaimer.
11600f1612SFelix Palmen * 2. Redistributions in binary form must reproduce the above copyright
12600f1612SFelix Palmen * notice, this list of conditions and the following disclaimer in the
13600f1612SFelix Palmen * documentation and/or other materials provided with the distribution.
14600f1612SFelix Palmen *
15600f1612SFelix Palmen * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16600f1612SFelix Palmen * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17600f1612SFelix Palmen * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18600f1612SFelix Palmen * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19600f1612SFelix Palmen * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20600f1612SFelix Palmen * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21600f1612SFelix Palmen * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22600f1612SFelix Palmen * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23600f1612SFelix Palmen * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24600f1612SFelix Palmen * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25600f1612SFelix Palmen * SUCH DAMAGE.
26600f1612SFelix Palmen */
27600f1612SFelix Palmen #ifndef _LINUXKPI_LINUX_IO_64_NONATOMIC_LO_HI_H_
28600f1612SFelix Palmen #define _LINUXKPI_LINUX_IO_64_NONATOMIC_LO_HI_H_
29600f1612SFelix Palmen
30600f1612SFelix Palmen #include <linux/io.h>
31600f1612SFelix Palmen
32600f1612SFelix Palmen static inline uint64_t
lo_hi_readq(const volatile void * addr)33600f1612SFelix Palmen lo_hi_readq(const volatile void *addr)
34600f1612SFelix Palmen {
35600f1612SFelix Palmen const volatile uint32_t *p = addr;
36600f1612SFelix Palmen uint32_t l, h;
37600f1612SFelix Palmen
38600f1612SFelix Palmen __io_br();
39600f1612SFelix Palmen l = le32toh(__raw_readl(p));
40600f1612SFelix Palmen h = le32toh(__raw_readl(p + 1));
41600f1612SFelix Palmen __io_ar();
42600f1612SFelix Palmen
43600f1612SFelix Palmen return (l + ((uint64_t)h << 32));
44600f1612SFelix Palmen }
45600f1612SFelix Palmen
46600f1612SFelix Palmen static inline void
lo_hi_writeq(uint64_t v,volatile void * addr)47600f1612SFelix Palmen lo_hi_writeq(uint64_t v, volatile void *addr)
48600f1612SFelix Palmen {
49600f1612SFelix Palmen volatile uint32_t *p = addr;
50600f1612SFelix Palmen
51600f1612SFelix Palmen __io_bw();
52600f1612SFelix Palmen __raw_writel(htole32(v), p);
53600f1612SFelix Palmen __raw_writel(htole32(v >> 32), p + 1);
54600f1612SFelix Palmen __io_aw();
55600f1612SFelix Palmen }
56600f1612SFelix Palmen
57600f1612SFelix Palmen #ifndef readq
58600f1612SFelix Palmen #define readq(addr) lo_hi_readq(addr)
59600f1612SFelix Palmen #endif
60600f1612SFelix Palmen
61600f1612SFelix Palmen #ifndef writeq
62600f1612SFelix Palmen #define writeq(v, addr) lo_hi_writeq(v, addr)
63600f1612SFelix Palmen #endif
64600f1612SFelix Palmen
65600f1612SFelix Palmen #endif /* _LINUXKPI_LINUX_IO_64_NONATOMIC_LO_HI_H_ */
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