diff options
| author | GuanXuetao <gxt@mprc.pku.edu.cn> | 2011-01-15 18:18:29 +0800 |
|---|---|---|
| committer | GuanXuetao <gxt@mprc.pku.edu.cn> | 2011-03-17 09:19:09 +0800 |
| commit | 10c9c10c31514564b09c153432a42ffaea3ce831 (patch) | |
| tree | 04a60b9a1e48eaa2d9346e265a1c2fe2db5ec670 /arch/unicore32/include/mach | |
| parent | 56372b0b2f533c9a25bd40a0577405f6ddb7cff2 (diff) | |
unicore32 core architecture: mm related: consistent device DMA handling
This patch implements consistent device DMA handling of memory management.
DMA device operations are also here.
Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/unicore32/include/mach')
| -rw-r--r-- | arch/unicore32/include/mach/dma.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/unicore32/include/mach/dma.h b/arch/unicore32/include/mach/dma.h new file mode 100644 index 000000000000..3e3224a10525 --- /dev/null +++ b/arch/unicore32/include/mach/dma.h @@ -0,0 +1,41 @@ +/* + * linux/arch/unicore32/include/mach/dma.h + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __MACH_PUV3_DMA_H__ +#define __MACH_PUV3_DMA_H__ + +/* + * The PKUnity has six internal DMA channels. + */ +#define MAX_DMA_CHANNELS 6 + +typedef enum { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 1, + DMA_PRIO_LOW = 2 +} puv3_dma_prio; + +/* + * DMA registration + */ + +extern int puv3_request_dma(char *name, + puv3_dma_prio prio, + void (*irq_handler)(int, void *), + void (*err_handler)(int, void *), + void *data); + +extern void puv3_free_dma(int dma_ch); + +#define puv3_stop_dma(ch) (DMAC_CONFIG(ch) &= ~DMAC_CONFIG_EN) +#define puv3_resume_dma(ch) (DMAC_CONFIG(ch) |= DMAC_CONFIG_EN) + +#endif /* __MACH_PUV3_DMA_H__ */ |