linux/arch/mips/include/asm/floppy.h
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   1/*
   2 * Architecture specific parts of the Floppy driver
   3 *
   4 * This file is subject to the terms and conditions of the GNU General Public
   5 * License.  See the file "COPYING" in the main directory of this archive
   6 * for more details.
   7 *
   8 * Copyright (C) 1995 - 2000 Ralf Baechle
   9 */
  10#ifndef _ASM_FLOPPY_H
  11#define _ASM_FLOPPY_H
  12
  13#include <linux/dma-mapping.h>
  14
  15static inline void fd_cacheflush(char * addr, long size)
  16{
  17        dma_cache_sync(NULL, addr, size, DMA_BIDIRECTIONAL);
  18}
  19
  20#define MAX_BUFFER_SECTORS 24
  21
  22
  23/*
  24 * And on Mips's the CMOS info fails also ...
  25 *
  26 * FIXME: This information should come from the ARC configuration tree
  27 *        or wherever a particular machine has stored this ...
  28 */
  29#define FLOPPY0_TYPE            fd_drive_type(0)
  30#define FLOPPY1_TYPE            fd_drive_type(1)
  31
  32#define FDC1                    fd_getfdaddr1()
  33
  34#define N_FDC 1                 /* do you *really* want a second controller? */
  35#define N_DRIVE 8
  36
  37/*
  38 * The DMA channel used by the floppy controller cannot access data at
  39 * addresses >= 16MB
  40 *
  41 * Went back to the 1MB limit, as some people had problems with the floppy
  42 * driver otherwise. It doesn't matter much for performance anyway, as most
  43 * floppy accesses go through the track buffer.
  44 *
  45 * On MIPSes using vdma, this actually means that *all* transfers go thru
  46 * the * track buffer since 0x1000000 is always smaller than KSEG0/1.
  47 * Actually this needs to be a bit more complicated since the so much different
  48 * hardware available with MIPS CPUs ...
  49 */
  50#define CROSS_64KB(a, s) ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)
  51
  52#define EXTRA_FLOPPY_PARAMS
  53
  54#include <floppy.h>
  55
  56#endif /* _ASM_FLOPPY_H */
  57