TMPR4938 datasheet(348/716 Pages) TOSHIBA

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Chapter 10 PCI Controller

10-72

Bit

Mnemonic

Field Name

Description

Read/Write

SRST

Software Reset

Soft Reset (Default: 0x0)

Performs PCI Controller software reset control. Data is also reloaded to the

Configuration Space Register from EEPROM or from the Configuration

Data Register. Please set this bit after the EEPROM Load End bit

(PCICSTATUS.E2PDONE) is set. Also, please use the software to clear

this bit at least four PCI Bus Clock cycles after Reset.

Other registers of the PCI Controller cannot be accessed while this bit is

set.

This bit differs from the Hardware Reset bit (HRST). The following register

values are not initialized.

• G2P Status Register (G2PSTATUS)

• PCI Bus Arbiter Status Register (PBASTATUS)

• PCI Controller Status Register (PCICSTATUS)

• Software Reset bit (PCICCFG.SRST)

• Load Configuration Register bit (PCICCFG.LCFG)

1: The PCI Controller is reset by the software.

0: The PCI Controller is not reset by the software.

R/W

IRBER

Bus Error

Response Setting

During Initiator

Read

Initiator Read Bus Error Response (Default: 0x1)

Bus error responses on the G-Bus are controlled when the following

phenomena indicated by the PCI Status, Command Register (PICSTATUS)

and the G2P Status Register (G2PSTATUS) occur during initiator Read

access.

Detected Parity Error (PCISTATUS.DPE)

Received Master Abort (PCISTATUS.RMA)

Received Target Abort (PCISTATUS.RTA)

Initiator Detected TRDY Time Out Error (G2PSTATUS.IDTTOE)

Initiator Detected Retry Time Out Error (G2PSTATUS.IDRTOE)

1: Responds with a Bus error on the G-Bus.

0: Does not respond with a Bus error on the G-Bus.

(Normally terminates the Read transaction on the G-Bus. Read data is

invalid.)

R/W

G2PM0EN

Initiator Memory

Space 0 Enable

Initiator Memory Space 0 Enable (Default: 0x0)

Controls PCI initiator access to Memory Space 0.

1: Memory Space 0 is valid.

0: Memory Space 0 is invalid.

R/W

G2PM1EN

Initiator Memory

Space 1 Enable

Initiator Memory Space 1 Enable (Default: 0x0)

Controls PCI initiator access to Memory Space 1.

1: Memory Space 1 is valid.

0: Memory Space 1 is invalid.

R/W

G2PM2EN

Initiator Memory

Space 2 Enable

Initiator Memory Space 2 Enable (Default: Normal Mode: 0x0; PCI Boot

Mode: 0x1)

Controls PCI initiator access to Memory Space 2.

1: Memory Space 2 is valid.

0: Memory Space 2 is invalid.

R/W

G2PIOEN

Initiator I/O Space

Enable

Initiator I/O Space Enable (Default: 0x0)

Controls PCI initiator access to the I/O Space..

1: I/O Space is valid.

0: I/O Space is invalid.

R/W

Figure 10.4.41 PCI Controller Configuration Register (2/3)

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