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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