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/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
  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
  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 */