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
__ide_insw(void __iomem * port,void * dst,u32 count)36 static 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
__ide_outsw(void __iomem * port,const void * src,u32 count)66 static 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 */
99