diff options
Diffstat (limited to 'linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h')
| -rw-r--r-- | linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h b/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h deleted file mode 100644 index e7893c59d4..0000000000 --- a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/floppy.h +++ /dev/null @@ -1,206 +0,0 @@ -/* - * Architecture specific parts of the Floppy driver - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1995 - * - * Modifications for Xen are Copyright (c) 2004, Keir Fraser. - */ -#ifndef __ASM_XEN_X86_64_FLOPPY_H -#define __ASM_XEN_X86_64_FLOPPY_H - -#include <linux/vmalloc.h> - -/* - * The DMA channel used by the floppy controller cannot access data at - * addresses >= 16MB - * - * Went back to the 1MB limit, as some people had problems with the floppy - * driver otherwise. It doesn't matter much for performance anyway, as most - * floppy accesses go through the track buffer. - */ -#define _CROSS_64KB(a,s,vdma) \ -(!(vdma) && ((unsigned long)(a)/K_64 != ((unsigned long)(a) + (s) - 1) / K_64)) - -/* XEN: Hit DMA paths on the head. This trick from asm-m68k/floppy.h. */ -#include <asm/dma.h> -#undef MAX_DMA_ADDRESS -#define MAX_DMA_ADDRESS 0 -#define CROSS_64KB(a,s) (0) - -#define fd_inb(port) inb_p(port) -#define fd_outb(value,port) outb_p(value,port) - -#define fd_request_dma() (0) -#define fd_free_dma() ((void)0) -#define fd_enable_irq() enable_irq(FLOPPY_IRQ) -#define fd_disable_irq() disable_irq(FLOPPY_IRQ) -#define fd_free_irq() free_irq(FLOPPY_IRQ, NULL) -#define fd_get_dma_residue() vdma_get_dma_residue(FLOPPY_DMA) -/* - * Do not use vmalloc/vfree: floppy_release_irq_and_dma() gets called from - * softirq context via motor_off_callback. A generic bug we happen to trigger. - */ -#define fd_dma_mem_alloc(size) __get_free_pages(GFP_KERNEL|__GFP_NORETRY, get_order(size)) -#define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) -#define fd_dma_setup(addr, size, mode, io) vdma_dma_setup(addr, size, mode, io) - -static int virtual_dma_count; -static int virtual_dma_residue; -static char *virtual_dma_addr; -static int virtual_dma_mode; -static int doing_pdma; - -static irqreturn_t floppy_hardint(int irq, void *dev_id, struct pt_regs * regs) -{ - register unsigned char st; - -#undef TRACE_FLPY_INT - -#ifdef TRACE_FLPY_INT - static int calls=0; - static int bytes=0; - static int dma_wait=0; -#endif - if (!doing_pdma) - return floppy_interrupt(irq, dev_id, regs); - -#ifdef TRACE_FLPY_INT - if(!calls) - bytes = virtual_dma_count; -#endif - - { - register int lcount; - register char *lptr; - - st = 1; - for(lcount=virtual_dma_count, lptr=virtual_dma_addr; - lcount; lcount--, lptr++) { - st=inb(virtual_dma_port+4) & 0xa0 ; - if(st != 0xa0) - break; - if(virtual_dma_mode) - outb_p(*lptr, virtual_dma_port+5); - else - *lptr = inb_p(virtual_dma_port+5); - } - virtual_dma_count = lcount; - virtual_dma_addr = lptr; - st = inb(virtual_dma_port+4); - } - -#ifdef TRACE_FLPY_INT - calls++; -#endif - if(st == 0x20) - return IRQ_HANDLED; - if(!(st & 0x20)) { - virtual_dma_residue += virtual_dma_count; - virtual_dma_count=0; -#ifdef TRACE_FLPY_INT - printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", - virtual_dma_count, virtual_dma_residue, calls, bytes, - dma_wait); - calls = 0; - dma_wait=0; -#endif - doing_pdma = 0; - floppy_interrupt(irq, dev_id, regs); - return IRQ_HANDLED; - } -#ifdef TRACE_FLPY_INT - if(!virtual_dma_count) - dma_wait++; -#endif - return IRQ_HANDLED; -} - -static void fd_disable_dma(void) -{ - doing_pdma = 0; - virtual_dma_residue += virtual_dma_count; - virtual_dma_count=0; -} - -static int vdma_get_dma_residue(unsigned int dummy) -{ - return virtual_dma_count + virtual_dma_residue; -} - - -static int fd_request_irq(void) -{ - return request_irq(FLOPPY_IRQ, floppy_hardint, - IRQF_DISABLED, "floppy", NULL); -} - -#if 0 -static unsigned long vdma_mem_alloc(unsigned long size) -{ - return (unsigned long) vmalloc(size); - -} - -static void vdma_mem_free(unsigned long addr, unsigned long size) -{ - vfree((void *)addr); -} -#endif - -static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io) -{ - doing_pdma = 1; - virtual_dma_port = io; - virtual_dma_mode = (mode == DMA_MODE_WRITE); - virtual_dma_addr = addr; - virtual_dma_count = size; - virtual_dma_residue = 0; - return 0; -} - -/* XEN: This trick to force 'virtual DMA' is from include/asm-m68k/floppy.h. */ -#define FDC1 xen_floppy_init() -static int FDC2 = -1; - -static int xen_floppy_init(void) -{ - use_virtual_dma = 1; - can_use_virtual_dma = 1; - return 0x3f0; -} - -/* - * Floppy types are stored in the rtc's CMOS RAM and so rtc_lock - * is needed to prevent corrupted CMOS RAM in case "insmod floppy" - * coincides with another rtc CMOS user. Paul G. - */ -#define FLOPPY0_TYPE ({ \ - unsigned long flags; \ - unsigned char val; \ - spin_lock_irqsave(&rtc_lock, flags); \ - val = (CMOS_READ(0x10) >> 4) & 15; \ - spin_unlock_irqrestore(&rtc_lock, flags); \ - val; \ -}) - -#define FLOPPY1_TYPE ({ \ - unsigned long flags; \ - unsigned char val; \ - spin_lock_irqsave(&rtc_lock, flags); \ - val = CMOS_READ(0x10) & 15; \ - spin_unlock_irqrestore(&rtc_lock, flags); \ - val; \ -}) - -#define N_FDC 2 -#define N_DRIVE 8 - -#define FLOPPY_MOTOR_MASK 0xf0 - -#define EXTRA_FLOPPY_PARAMS - -#endif /* __ASM_XEN_X86_64_FLOPPY_H */ |