summaryrefslogtreecommitdiffstats
path: root/include/asm-xtensa/dma.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-xtensa/dma.h')
-rw-r--r--include/asm-xtensa/dma.h61
1 files changed, 0 insertions, 61 deletions
diff --git a/include/asm-xtensa/dma.h b/include/asm-xtensa/dma.h
deleted file mode 100644
index e30f3abf48f0..000000000000
--- a/include/asm-xtensa/dma.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * include/asm-xtensa/dma.h
- *
- * 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) 2003 - 2005 Tensilica Inc.
- */
-
-#ifndef _XTENSA_DMA_H
-#define _XTENSA_DMA_H
-
-#include <asm/io.h> /* need byte IO */
-
-/*
- * This is only to be defined if we have PC-like DMA.
- * By default this is not true on an Xtensa processor,
- * however on boards with a PCI bus, such functionality
- * might be emulated externally.
- *
- * NOTE: there still exists driver code that assumes
- * this is defined, eg. drivers/sound/soundcard.c (as of 2.4).
- */
-#define MAX_DMA_CHANNELS 8
-
-/*
- * The maximum virtual address to which DMA transfers
- * can be performed on this platform.
- *
- * NOTE: This is board (platform) specific, not processor-specific!
- *
- * NOTE: This assumes DMA transfers can only be performed on
- * the section of physical memory contiguously mapped in virtual
- * space for the kernel. For the Xtensa architecture, this
- * means the maximum possible size of this DMA area is
- * the size of the statically mapped kernel segment
- * (XCHAL_KSEG_{CACHED,BYPASS}_SIZE), ie. 128 MB.
- *
- * NOTE: When the entire KSEG area is DMA capable, we substract
- * one from the max address so that the virt_to_phys() macro
- * works correctly on the address (otherwise the address
- * enters another area, and virt_to_phys() may not return
- * the value desired).
- */
-
-#define MAX_DMA_ADDRESS (PAGE_OFFSET + XCHAL_KIO_SIZE - 1)
-
-
-/* Reserve and release a DMA channel */
-extern int request_dma(unsigned int dmanr, const char * device_id);
-extern void free_dma(unsigned int dmanr);
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
-
-#endif
OpenPOWER on IntegriCloud