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/spitfire.h>
17 #include <asm/cacheflush.h>
18 #include <asm/page.h>
19 #else
20 #include <linux/pgtable.h>
21 #include <asm/psr.h>
22 #endif
23
24 #define __ide_insl(data_reg, buffer, wcount) \
25 __ide_insw(data_reg, buffer, (wcount)<<1)
26 #define __ide_outsl(data_reg, buffer, wcount) \
27 __ide_outsw(data_reg, buffer, (wcount)<<1)
28
29 /* On sparc, I/O ports and MMIO registers are accessed identically. */
30 #define __ide_mm_insw __ide_insw
31 #define __ide_mm_insl __ide_insl
32 #define __ide_mm_outsw __ide_outsw
33 #define __ide_mm_outsl __ide_outsl
34
__ide_insw(void __iomem * port,void * dst,u32 count)35 static inline void __ide_insw(void __iomem *port, void *dst, u32 count)
36 {
37 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
38 unsigned long end = (unsigned long)dst + (count << 1);
39 #endif
40 u16 *ps = dst;
41 u32 *pi;
42
43 if(((unsigned long)ps) & 0x2) {
44 *ps++ = __raw_readw(port);
45 count--;
46 }
47 pi = (u32 *)ps;
48 while(count >= 2) {
49 u32 w;
50
51 w = __raw_readw(port) << 16;
52 w |= __raw_readw(port);
53 *pi++ = w;
54 count -= 2;
55 }
56 ps = (u16 *)pi;
57 if(count)
58 *ps++ = __raw_readw(port);
59
60 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
61 __flush_dcache_range((unsigned long)dst, end);
62 #endif
63 }
64
__ide_outsw(void __iomem * port,const void * src,u32 count)65 static inline void __ide_outsw(void __iomem *port, const void *src, u32 count)
66 {
67 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
68 unsigned long end = (unsigned long)src + (count << 1);
69 #endif
70 const u16 *ps = src;
71 const u32 *pi;
72
73 if(((unsigned long)src) & 0x2) {
74 __raw_writew(*ps++, port);
75 count--;
76 }
77 pi = (const u32 *)ps;
78 while(count >= 2) {
79 u32 w;
80
81 w = *pi++;
82 __raw_writew((w >> 16), port);
83 __raw_writew(w, port);
84 count -= 2;
85 }
86 ps = (const u16 *)pi;
87 if(count)
88 __raw_writew(*ps, port);
89
90 #if defined(CONFIG_SPARC64) && defined(DCACHE_ALIASING_POSSIBLE)
91 __flush_dcache_range((unsigned long)src, end);
92 #endif
93 }
94
95 #endif /* __KERNEL__ */
96
97 #endif /* _SPARC_IDE_H */
98