author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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#ifndef _ASM_X86_MCA_DMA_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define _ASM_X86_MCA_DMA_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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#include <asm/io.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/ioport.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Microchannel specific DMA stuff. DMA on an MCA machine is fairly similar to |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* standard PC dma, but it certainly has its quirks. DMA register addresses |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* are in a different place and there are some added functions. Most of this |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* should be pretty obvious on inspection. Note that the user must divide |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* count by 2 when using 16-bit dma; that is not handled by these functions. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Ramen Noodles are yummy. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* 1998 Tymm Twillman <tymm@computer.org> |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Registers that are used by the DMA controller; FN is the function register |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* (tell the controller what to do) and EXE is the execution register (how |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* to do it) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#define MCA_DMA_REG_FN 0x18 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_REG_EXE 0x1A |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* |
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* Functions that the DMA controller can do |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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|
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#define MCA_DMA_FN_SET_IO 0x00 |
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#define MCA_DMA_FN_SET_ADDR 0x20 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_FN_GET_ADDR 0x30 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_FN_SET_COUNT 0x40 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_FN_GET_COUNT 0x50 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_FN_GET_STATUS 0x60 |
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#define MCA_DMA_FN_SET_MODE 0x70 |
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#define MCA_DMA_FN_SET_ARBUS 0x80 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_FN_MASK 0x90 |
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#define MCA_DMA_FN_RESET_MASK 0xA0 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define MCA_DMA_FN_MASTER_CLEAR 0xD0 |
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Modes (used by setting MCA_DMA_FN_MODE in the function register) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Note that the MODE_READ is read from memory (write to device), and |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* MODE_WRITE is vice-versa. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#define MCA_DMA_MODE_XFER 0x04 /* read by default */ |
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#define MCA_DMA_MODE_READ 0x04 /* same as XFER */ |
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#define MCA_DMA_MODE_WRITE 0x08 /* OR with MODE_XFER to use */ |
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#define MCA_DMA_MODE_IO 0x01 /* DMA from IO register */ |
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#define MCA_DMA_MODE_16 0x40 /* 16 bit xfers */ |
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* mca_enable_dma - channel to enable DMA on |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* @dmanr: DMA channel |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* Enable the MCA bus DMA on a channel. This can be called from |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* IRQ context. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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static inline void mca_enable_dma(unsigned int dmanr) |
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{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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outb(MCA_DMA_FN_RESET_MASK | dmanr, MCA_DMA_REG_FN); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* mca_disble_dma - channel to disable DMA on |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* @dmanr: DMA channel |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Enable the MCA bus DMA on a channel. This can be called from |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* IRQ context. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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static inline void mca_disable_dma(unsigned int dmanr) |
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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outb(MCA_DMA_FN_MASK | dmanr, MCA_DMA_REG_FN); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* mca_set_dma_addr - load a 24bit DMA address |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* @dmanr: DMA channel |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @a: 24bit bus address |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Load the address register in the DMA controller. This has a 24bit |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* limitation (16Mb). |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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static inline void mca_set_dma_addr(unsigned int dmanr, unsigned int a) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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outb(MCA_DMA_FN_SET_ADDR | dmanr, MCA_DMA_REG_FN); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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outb(a & 0xff, MCA_DMA_REG_EXE); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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outb((a >> 8) & 0xff, MCA_DMA_REG_EXE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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outb((a >> 16) & 0xff, MCA_DMA_REG_EXE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* mca_get_dma_addr - load a 24bit DMA address |
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* @dmanr: DMA channel |
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* |
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* Read the address register in the DMA controller. This has a 24bit |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* limitation (16Mb). The return is a bus address. |
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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static inline unsigned int mca_get_dma_addr(unsigned int dmanr) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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111 |
unsigned int addr; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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outb(MCA_DMA_FN_GET_ADDR | dmanr, MCA_DMA_REG_FN); |
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addr = inb(MCA_DMA_REG_EXE); |
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115 |
addr |= inb(MCA_DMA_REG_EXE) << 8; |
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addr |= inb(MCA_DMA_REG_EXE) << 16; |
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117 |
|
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return addr; |
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119 |
} |
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|
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121 |
/** |
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122 |
* mca_set_dma_count - load a 16bit transfer count |
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* @dmanr: DMA channel |
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* @count: count |
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125 |
* |
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* Set the DMA count for this channel. This can be up to 64Kbytes. |
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* Setting a count of zero will not do what you expect. |
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128 |
*/ |
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129 |
|
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static inline void mca_set_dma_count(unsigned int dmanr, unsigned int count) |
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{ |
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count--; /* transfers one more than count -- correct for this */ |
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133 |
|
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outb(MCA_DMA_FN_SET_COUNT | dmanr, MCA_DMA_REG_FN); |
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outb(count & 0xff, MCA_DMA_REG_EXE); |
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outb((count >> 8) & 0xff, MCA_DMA_REG_EXE); |
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137 |
} |
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138 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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139 |
/** |
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* mca_get_dma_residue - get the remaining bytes to transfer |
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141 |
* @dmanr: DMA channel |
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142 |
* |
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* This function returns the number of bytes left to transfer |
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* on this DMA channel. |
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145 |
*/ |
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146 |
|
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static inline unsigned int mca_get_dma_residue(unsigned int dmanr) |
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{ |
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149 |
unsigned short count; |
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150 |
|
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151 |
outb(MCA_DMA_FN_GET_COUNT | dmanr, MCA_DMA_REG_FN); |
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152 |
count = 1 + inb(MCA_DMA_REG_EXE); |
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153 |
count += inb(MCA_DMA_REG_EXE) << 8; |
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154 |
|
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155 |
return count; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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156 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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157 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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158 |
/** |
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159 |
* mca_set_dma_io - set the port for an I/O transfer |
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160 |
* @dmanr: DMA channel |
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161 |
* @io_addr: an I/O port number |
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162 |
* |
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163 |
* Unlike the ISA bus DMA controllers the DMA on MCA bus can transfer |
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164 |
* with an I/O port target. |
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165 |
*/ |
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166 |
|
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167 |
static inline void mca_set_dma_io(unsigned int dmanr, unsigned int io_addr) |
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168 |
{ |
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169 |
/* |
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170 |
* DMA from a port address -- set the io address |
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Port of Linux 2.6.28 for use with network simulation cradle.
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171 |
*/ |
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172 |
|
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173 |
outb(MCA_DMA_FN_SET_IO | dmanr, MCA_DMA_REG_FN); |
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174 |
outb(io_addr & 0xff, MCA_DMA_REG_EXE); |
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175 |
outb((io_addr >> 8) & 0xff, MCA_DMA_REG_EXE); |
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176 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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177 |
|
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178 |
/** |
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179 |
* mca_set_dma_mode - set the DMA mode |
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180 |
* @dmanr: DMA channel |
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181 |
* @mode: mode to set |
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182 |
* |
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parents:
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183 |
* The DMA controller supports several modes. The mode values you can |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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184 |
* set are- |
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Port of Linux 2.6.28 for use with network simulation cradle.
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185 |
* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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186 |
* %MCA_DMA_MODE_READ when reading from the DMA device. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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187 |
* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
188 |
* %MCA_DMA_MODE_WRITE to writing to the DMA device. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
189 |
* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
190 |
* %MCA_DMA_MODE_IO to do DMA to or from an I/O port. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
191 |
* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
192 |
* %MCA_DMA_MODE_16 to do 16bit transfers. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
193 |
*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
194 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
195 |
static inline void mca_set_dma_mode(unsigned int dmanr, unsigned int mode) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
196 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
197 |
outb(MCA_DMA_FN_SET_MODE | dmanr, MCA_DMA_REG_FN); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
198 |
outb(mode, MCA_DMA_REG_EXE); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
199 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
200 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
201 |
#endif /* _ASM_X86_MCA_DMA_H */ |