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 <asm/io.h>
14
15 static inline void fd_cacheflush(char * addr, long size)
16 {
17 dma_cache_wback_inv((unsigned long)addr, size);
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 */