arch/sparc/include/asm/ide.h

   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
  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
  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 */