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MON960 Support for IQ80960RM/RN
5.4.2
PCI BIOS Routines
MON960 includes PCI BIOS routines to aid application software initialization of the secondary
PCI bus. The supported BIOS functions are described in the subsections that follow.
sysPCIBIOSPresent
sysFindPCIDevice
sysFINDPCIClassCode
sysGenerateSpecialCycle
sysReadConfigByte
sysReadConfigWord
sysReadConfigDword
sysWriteConfigByte
sysWriteConfigWord
sysWriteConfigDword
sysGetIrqRoutingOptions
sysSetPCIIrq
These functions preserve, as closely as possible, the parameters and return values described in the
PCI Local Bus Specification Revision 2.1. Functions that return multiple values do so by filling in
the fields of a structure passed by the calling routine.
You can access these functions via a calls instruction. The system call indices are defined in the
MON960 source file PCI_BIOS.H. The function prototypes are defined in the IQRP_ASM.H
file.
5.4.2.1
sysPCIBIOSPresent
This function allows the caller to determine whether the PCI BIOS interface function set is present,
and the current interface version level. It also provides information about the hardware mechanism
used for accessing configuration space and whether or not the hardware supports generation of PCI
Special Cycles.
Calling convention:
int sysPCIBIOSPresent (
PCI_BIOS_INFO *info
);
Return values:
This function always returns SUCCESSFUL.
5-6
IQ80960RM/RN Evaluation Board Manual
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