In article <200106200639.PAA22283@srapc342.sra.co.jp>
soda@sra.co.jp writes:

> Although I don't have access to PCI based machines, I thought
> at least TGA driver could access memory mapped space. Couldn't it?

TGA is working on JC94, but it does not use pci_mapreg_map()
but bus_space_map(). I'm not familiar with the PCI spec, though...

> What is the value of the base address register?
> (e.g. pci_conf_read(pa->pa_pc, pa->pa_tag, 0x14) for siop case)

A kernel with options PCI_CONFIG_DUMP says:

---
siop0 at pci0 dev 4 function 0: PCI configuration registers:
  Common header:
    0x00: 0x000f1000 0x02000007 0x01000003 0x0000f800

    Vendor Name: Symbios Logic (0x1000)
    Device Name: 53c875/876 (0x000f)
    Command register: 0x0007
      I/O space accesses: on
      Memory space accesses: on
      Bus mastering: on
      Special cycles: off
      MWI transactions: off
      Palette snooping: off
      Parity error checking: off
      Address/data stepping: off
      System error (SERR): off
      Fast back-to-back transactions: off
    Status register: 0x0200
      Capability List support: off
      66 MHz capable: off
      User Definable Features (UDF) support: off
      Fast back-to-back capable: off
      Data parity error detected: off
      DEVSEL timing: medium (0x1)
      Slave signaled Target Abort: off
      Master received Target Abort: off
      Master received Master Abort: off
      Asserted System Error (SERR): off
      Parity error detected: off
    Class Name: mass storage (0x01)
    Subclass Name: SCSI (0x00)
    Interface: 0x00
    Revision ID: 0x03
    BIST: 0x00
    Header Type: 0x00 (0x00)
    Latency Timer: 0xf8
    Cache Line Size: 0x00

  Type 0 ("normal" device) header:
    0x10: 0x00100001 0x10040000 0x10041000 0x00000000
    0x20: 0x00000000 0x00000000 0x00000000 0x00000000
    0x30: 0x10040001 0x00000000 0x00000000 0x40110100

    Base address register at 0x10
      type: 32-bit i/o
      base: 0x00100000, size: 0x00000100
    Base address register at 0x14
      type: 32-bit nonprefetchable memory
      base: 0x10040000, size: 0x00000100
    Base address register at 0x18
      type: 32-bit nonprefetchable memory
      base: 0x10041000, size: 0x00001000
    Base address register at 0x1c
      not implemented(?)
    Base address register at 0x20
      not implemented(?)
    Base address register at 0x24
      not implemented(?)
    Cardbus CIS Pointer: 0x00000000
    Subsystem vendor ID: 0x0000
    Subsystem ID: 0x0000
    Expansion ROM Base Address: 0x10040001
    Reserved @ 0x34: 0x00000000
    Reserved @ 0x38: 0x00000000
    Maximum Latency: 0x40
    Minimum Grant: 0x11
    Interrupt pin: 0x01 (pin A)
    Interrupt line: 0x00

  Device-dependent header:
    0x40: 0x00000000 0x00000000 0x00000000 0x00000000
    0x50: 0x00000000 0x00000000 0x00000000 0x00000000
    0x60: 0x00000000 0x00000000 0x00000000 0x00000000
    0x70: 0x00000000 0x00000000 0x00000000 0x00000000
    0x80: 0x000000c0 0x0f000000 0x00000000 0x0a080080
    0x90: 0x00000000 0xffffff00 0x3031f000 0x00000000
    0xa0: 0x04000000 0x00000000 0x00000000 0x00000000
    0xb0: 0x00000000 0x00000000 0x00000000 0x00000000
    0xc0: 0x00000000 0x0f700000 0x00000000 0x000000f7
    0xd0: 0x00000000 0x00000000 0x00000000 0x00000000
    0xe0: 0x9c08b421 0x5e3445d5 0xcf158821 0xfe458bf5
    0xf0: 0x893517a5 0x8fd6f7fd 0x62928010 0xbb39a7f5

    Don't know how to pretty-print device-dependent header.

Symbios Logic 53c875/876 (SCSI mass storage, revision 0x03) at ? dev 4 function 0 (tag 0x80002000, intrtag 0x80002000, intrswiz 0, intrpin 0x1, i/o on, mem on, no quirks): Symbios Logic 53c875 (ultra-wide scsi)

---
Izumi Tsutsui
tsutsui@ceres.dti.ne.jp