ARTHURT请进，我需要你的帮助！！！！！！

我现在的pci驱动程序装上以后，从控制面板-〉系统 中看到的我的pci板的信息（内存地址、端口等）是不是真正和我的板子相对应起来了，我是不是对这些地址进行mmmapiospace()便可对内存或端口进行直接操作？  :D

[编辑 -  6/10/02 by  shengws]

[编辑 -  6/10/02 by  shengws]

[编辑 -  6/10/02 by  shengws]

是。

ARTHURT:那么我想知道，能够看到这些信息，我也能够读出PCI配置空间的内容，是不是能够说明跟硬件端口或内存通讯是可以成功的？
（我现在读内存老是出错死机，用READ(WRITE)_REGISTER_UCHAR），能帮我分析一下原因吗？

[编辑 -  6/10/02 by  shengws]

是的。
我见到的都是IO space映射的，原因我可猜不出来。 :D
详细点？

我先做循环从资源列表读出系统资源，现在读出的是内存的，取的是
U.MEMORY.START,然后MMMAPIOSPACE映射这个东东，然后读写内存READ(WRITE)_REGISTER_UCHAR，机器就死掉了，是不是用读写函数的时候有条件限制？

[编辑 -  6/10/02 by  shengws]

看起来好像是对的。
你确定你的设备用了内存映射？
Flags
Contains bit flags that are specific to the resource type, as indicated in the following table. Flags can be OR\'ed together as appropriate. Resource
Type
Flag
Definition
CmResourceTypePort
  CM_RESOURCE_PORT_MEMORY The device is accessed in memory address space.
CM_RESOURCE_PORT_IO The device is accessed in IO address space.
CM_RESOURCE_PORT_10_BIT_DECODE The device decodes 10 bits of the port address.
CM_RESOURCE_PORT_12_BIT_DECODE The device decodes 12 bits of the port address.
CM_RESOURCE_PORT_16_BIT_DECODE The device decodes 16 bits of the port address.
CM_RESOURCE_PORT_POSITIVE_DECODE The device uses \"positive decode\" instead of \"subtractive decode\". (In general, PCI devices use positive decode and ISA buses use subtractive decode.)
CM_RESOURCE_PORT_PASSIVE_DECODE The device decodes the port but the driver does not use it.
CM_RESOURCE_PORT_WINDOW_DECODE Reserved for system use.
CmResourceTypeInterrupt
  CM_RESOURCE_INTERRUPT_LEVEL_SENSITIVE The IRQ line is level-triggered. (These IRQs are usually shareable.)
CM_RESOURCE_INTERRUPT_LATCHED The IRQ line is edge-triggered.
CmResourceTypeMemory
  CM_RESOURCE_MEMORY_READ_WRITE The memory range is readable and writable.
CM_RESOURCE_MEMORY_READ_ONLY The memory range is read-only.
CM_RESOURCE_MEMORY_WRITE_ONLY The memory range is write-only.
CM_RESOURCE_MEMORY_PREFETCHABLE The memory range is pre-fetchable.
CM_RESOURCE_MEMORY_COMBINEDWRITE Combined-write caching is allowed.
CM_RESOURCE_MEMORY_24 The device uses 24-bit addressing.
CM_RESOURCE_MEMORY_CACHEABLE The memory range is cacheable.
CmResourceTypeDma
  CM_RESOURCE_DMA_8 8-bit DMA channel
CM_RESOURCE_DMA_16 16-bit DMA channel
CM_RESOURCE_DMA_32 32-bit DMA channel
CM_RESOURCE_DMA_8_AND_16 8-bit and 16-bit DMA channel
CM_RESOURCE_DMA_BUS_MASTER The device supports bus master DMA transfers.
CM_RESOURCE_DMA_TYPE_A Type A DMA
CM_RESOURCE_DMA_TYPE_B Type B DMA
CM_RESOURCE_DMA_TYPE_F Type F DMA

我刚才测了以下资源FLAGS,所得到的结果并不在CM_RESOURCE_MEMORY_READ_WRITE The memory range is readable and writable.
CM_RESOURCE_MEMORY_READ_ONLY The memory range is read-only.
CM_RESOURCE_MEMORY_WRITE_ONLY The memory range is write-only.
这3种中间，证明所得内存并不是可读可写的，谢谢你的关心！
那如何我才能将内存变成可读可写，是否需要设置还是？

关系到PCI配置空间。
问问你的硬件工程师，他是不是对的。

我刚才看了我的PCI配置空间的COMMAND位，它的低两位都是1，我们用的是ACTEL芯片，按照它的说明书，这两位如果是00，它是这样解释的（A VALUE OF \'0\'DISABLES THE DEVICE\'S RESPONSE TO I/O(MEMORY)SPACE ADDRESS），可是我在得到资源里面的FLAGS却和他相反，这东西真是头痛死我了！

我的资源类型是
CM_RESOURCE_MEMORY_PREFETCHABLE The memory range is pre-fetchable.
我想知道怎样来操作这种类型的内存空间

我也不清楚了，问高手了。 :D