1/* SPDX-License-Identifier: GPL-2.0 */
 2/* ide.h: SPARC PCI specific IDE glue.
 3 *
 4 * Copyright (C) 1997  David S. Miller (davem@davemloft.net)
 5 * Copyright (C) 1998  Eddie C. Dost   (ecd@skynet.be)
 6 * Adaptation from sparc64 version to sparc by Pete Zaitcev.
 7 */
 8
 9#ifndef _SPARC_IDE_H
10#define _SPARC_IDE_H
11
12#ifdef __KERNEL__
13
14#include <asm/io.h>
15#ifdef CONFIG_SPARC64
16#include <asm/pgalloc.h>
17#include <asm/spitfire.h>
18#include <asm/cacheflush.h>
19#include <asm/page.h>
20#else
21#include <asm/pgtable.h>
22#include <asm/psr.h>
23#endif
24
25#define __ide_insl(data_reg, buffer, wcount) \
26	__ide_insw(data_reg, buffer, (wcount)<<1)
27#define __ide_outsl(data_reg, buffer, wcount) \
28	__ide_outsw(data_reg, buffer, (wcount)<<1)
29
30/* On sparc, I/O ports and MMIO registers are accessed identically.  */
31#define __ide_mm_insw	__ide_insw
32#define __ide_mm_insl	__ide_insl
33#define __ide_mm_outsw	__ide_outsw
34#define __ide_mm_outsl	__ide_outsl
35
36static inline void __ide_insw(void __iomem *port, void *dst, u32 count)
37{
38#if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
39	unsigned long end = (unsigned long)dst + (count << 1);
40#endif
41	u16 *ps = dst;
42	u32 *pi;
43
44	if(((unsigned long)ps) & 0x2) {
45		*ps++ = __raw_readw(port);
46		count--;
47	}
48	pi = (u32 *)ps;
49	while(count >= 2) {
50		u32 w;
51
52		w  = __raw_readw(port) << 16;
53		w |= __raw_readw(port);
54		*pi++ = w;
55		count -= 2;
56	}
57	ps = (u16 *)pi;
58	if(count)
59		*ps++ = __raw_readw(port);
60
61#if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
62	__flush_dcache_range((unsigned long)dst, end);
63#endif
64}
65
66static inline void __ide_outsw(void __iomem *port, const void *src, u32 count)
67{
68#if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
69	unsigned long end = (unsigned long)src + (count << 1);
70#endif
71	const u16 *ps = src;
72	const u32 *pi;
73
74	if(((unsigned long)src) & 0x2) {
75		__raw_writew(*ps++, port);
76		count--;
77	}
78	pi = (const u32 *)ps;
79	while(count >= 2) {
80		u32 w;
81
82		w = *pi++;
83		__raw_writew((w >> 16), port);
84		__raw_writew(w, port);
85		count -= 2;
86	}
87	ps = (const u16 *)pi;
88	if(count)
89		__raw_writew(*ps, port);
90
91#if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
92	__flush_dcache_range((unsigned long)src, end);
93#endif
94}
95
96#endif /* __KERNEL__ */
97
98#endif /* _SPARC_IDE_H */