src/arch/x86/pcibios.hpp

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/* header file for src/arch/x86/pcibios.cpp */

#ifndef _CORE_ARCH_X86_PCIBIOS_HPP
#define _CORE_ARCH_X86_PCIBIOS_HPP

extern uint32 Pci32_Addr;

struct bios32_service_directory_struct* find_bios32_service_directory_header();
int bios32_service (struct bios32_service_directory_struct* b32, uint32 magic, uint32 *cseg_size, uint32 *offset, uint32 *base_addr);
int pci32_installation_check(uint32 addr);
const char *pci32_sub_class_name (uint16 class_no, uint16 subclass_no);
const char *pci32_base_class_name (uint16 class_no);
const char *pci32_vendor_name (uint16 vendor_no);

int pci32_read_configuration_dword(uint32 *result, uint32 addr, uint8 bus_no, uint8 dev_no, uint8 func_no, uint16 reg_no);
int pci32_read_configuration_word(uint16 *result, uint32 addr, uint8 bus_no, uint8 dev_no, uint8 func_no, uint16 reg_no);
int pci32_read_configuration_byte(uint8 *result, uint32 addr, uint8 bus_no, uint8 dev_no, uint8 func_no, uint16 reg_no);
int pci32_write_configuration_dword(uint32 val, uint32 addr, uint8 bus_no, uint8 dev_no, uint8 func_no, uint16 reg_no);
int pci32_write_configuration_word(uint16 val, uint32 addr, uint8 bus_no, uint8 dev_no, uint8 func_no, uint16 reg_no);
int pci32_write_configuration_byte(uint8 val, uint32 addr, uint8 bus_no, uint8 dev_no, uint8 func_no, uint16 reg_no);

//pci configuration space
#define PCI_VENDOR_ID           0x00    //16bits
#define PCI_COMMAND                     0x04    //16bits
#define PCI_LATENCY_TIMER       0x0d    //8bits
#define PCI_BASE_ADDRESS_0      0x10    /* 32 bits */

//pci command
#define PCI_COMMAND_IO          0x01    //enable response in io space
#define PCI_COMMAND_MASTER      0x04    //enable bus mastering

//class code macros
#define PCI_BASECLASS(cls)      (((cls)>>24)&0xFF)
#define PCI_SUBCLASS(cls)       (((cls)>>16)&0xFF)
#define PCI_PI(cls)     (((cls)>>8)&0xFF)

//the configuration register enumeration
const uint16 PCI32_DEVICEID     =0;
const uint16 PCI32_STATUS       =4;
const uint16 PCI32_CLASS        =8;
const uint16 PCI32_BASE_ADDRESS_REGS=0x10;

#endif

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