cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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floppy.h (3182B)

      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
      9 */
     10#ifndef __ASM_ALPHA_FLOPPY_H
     11#define __ASM_ALPHA_FLOPPY_H
     12
     13
     14#define fd_inb(base, reg)		inb_p((base) + (reg))
     15#define fd_outb(value, base, reg)	outb_p(value, (base) + (reg))
     16
     17#define fd_enable_dma()         enable_dma(FLOPPY_DMA)
     18#define fd_disable_dma()        disable_dma(FLOPPY_DMA)
     19#define fd_request_dma()        request_dma(FLOPPY_DMA,"floppy")
     20#define fd_free_dma()           free_dma(FLOPPY_DMA)
     21#define fd_clear_dma_ff()       clear_dma_ff(FLOPPY_DMA)
     22#define fd_set_dma_mode(mode)   set_dma_mode(FLOPPY_DMA,mode)
     23#define fd_set_dma_addr(addr)   set_dma_addr(FLOPPY_DMA,virt_to_bus(addr))
     24#define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA,count)
     25#define fd_enable_irq()         enable_irq(FLOPPY_IRQ)
     26#define fd_disable_irq()        disable_irq(FLOPPY_IRQ)
     27#define fd_request_irq()        request_irq(FLOPPY_IRQ, floppy_interrupt,\
     28					    0, "floppy", NULL)
     29#define fd_free_irq()           free_irq(FLOPPY_IRQ, NULL)
     30
     31#ifdef CONFIG_PCI
     32
     33#include <linux/pci.h>
     34
     35#define fd_dma_setup(addr,size,mode,io) alpha_fd_dma_setup(addr,size,mode,io)
     36
     37static __inline__ int 
     38alpha_fd_dma_setup(char *addr, unsigned long size, int mode, int io)
     39{
     40	static unsigned long prev_size;
     41	static dma_addr_t bus_addr = 0;
     42	static char *prev_addr;
     43	static int prev_dir;
     44	int dir;
     45
     46	dir = (mode != DMA_MODE_READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
     47
     48	if (bus_addr 
     49	    && (addr != prev_addr || size != prev_size || dir != prev_dir)) {
     50		/* different from last time -- unmap prev */
     51		dma_unmap_single(&isa_bridge->dev, bus_addr, prev_size,
     52				 prev_dir);
     53		bus_addr = 0;
     54	}
     55
     56	if (!bus_addr)	/* need to map it */
     57		bus_addr = dma_map_single(&isa_bridge->dev, addr, size, dir);
     58
     59	/* remember this one as prev */
     60	prev_addr = addr;
     61	prev_size = size;
     62	prev_dir = dir;
     63
     64	fd_clear_dma_ff();
     65	fd_set_dma_mode(mode);
     66	set_dma_addr(FLOPPY_DMA, bus_addr);
     67	fd_set_dma_count(size);
     68	virtual_dma_port = io;
     69	fd_enable_dma();
     70
     71	return 0;
     72}
     73
     74#endif /* CONFIG_PCI */
     75
     76__inline__ void virtual_dma_init(void)
     77{
     78	/* Nothing to do on an Alpha */
     79}
     80
     81static int FDC1 = 0x3f0;
     82static int FDC2 = -1;
     83
     84/*
     85 * Again, the CMOS information doesn't work on the alpha..
     86 */
     87#define FLOPPY0_TYPE 6
     88#define FLOPPY1_TYPE 0
     89
     90#define N_FDC 2
     91#define N_DRIVE 8
     92
     93/*
     94 * Most Alphas have no problems with floppy DMA crossing 64k borders,
     95 * except for certain ones, like XL and RUFFIAN.
     96 *
     97 * However, the test is simple and fast, and this *is* floppy, after all,
     98 * so we do it for all platforms, just to make sure.
     99 *
    100 * This is advantageous in other circumstances as well, as in moving
    101 * about the PCI DMA windows and forcing the floppy to start doing
    102 * scatter-gather when it never had before, and there *is* a problem
    103 * on that platform... ;-}
    104 */
    105
    106static inline unsigned long CROSS_64KB(void *a, unsigned long s)
    107{
    108	unsigned long p = (unsigned long)a;
    109	return ((p + s - 1) ^ p) & ~0xffffUL;
    110}
    111
    112#define EXTRA_FLOPPY_PARAMS
    113
    114#endif /* __ASM_ALPHA_FLOPPY_H */