plf_io.h

来自「eCos操作系统源码」· C头文件 代码 · 共 170 行

#ifndef CYGONCE_PLF_IO_H
#define CYGONCE_PLF_IO_H

//=============================================================================
//
//      plf_io.h
//
//      Platform specific IO support
//
//=============================================================================
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    jskov 
// Contributors: jskov
// Date:         2001-05-29
// Purpose:      HS7729PCI SD0001 PCI IO support macros
// Description: 
// Usage:        #include <cyg/hal/plf_io.h>
//
//####DESCRIPTIONEND####
//
//=============================================================================

#include <cyg/hal/hal_io.h>             // IO macros
#include <cyg/hal/sd0001.h>             // SD0001 registers
#include <cyg/hal/hal_intr.h>           // interrupt

extern cyg_uint32 cyg_hal_plf_pci_cfg_read_dword (cyg_uint32 bus, cyg_uint32 devfn,
                                                  cyg_uint32 offset);
extern cyg_uint16 cyg_hal_plf_pci_cfg_read_word  (cyg_uint32 bus, cyg_uint32 devfn,
                                                  cyg_uint32 offset);
extern cyg_uint8 cyg_hal_plf_pci_cfg_read_byte   (cyg_uint32 bus, cyg_uint32 devfn,
                                                  cyg_uint32 offset);
extern void cyg_hal_plf_pci_cfg_write_dword (cyg_uint32 bus, cyg_uint32 devfn,
                                             cyg_uint32 offset, cyg_uint32 val);
extern void cyg_hal_plf_pci_cfg_write_word  (cyg_uint32 bus, cyg_uint32 devfn,
                                             cyg_uint32 offset, cyg_uint16 val);
extern void cyg_hal_plf_pci_cfg_write_byte   (cyg_uint32 bus, cyg_uint32 devfn,
                                              cyg_uint32 offset, cyg_uint8 val);


// Initialize the PCI bus.
externC void cyg_hal_plf_pci_init(void);
#define HAL_PCI_INIT() cyg_hal_plf_pci_init()

// Map PCI device resources starting from these addresses in PCI space.
#define HAL_PCI_ALLOC_BASE_IO     0x00000000
#define HAL_PCI_ALLOC_BASE_MEMORY 0x00000000

// This is where the PCI spaces are mapped in the CPU's address space.
#define HAL_PCI_PHYSICAL_IO_BASE     0xb0800000
#define HAL_PCI_PHYSICAL_MEMORY_BASE 0xb1000000

// Read a value from the PCI configuration space of the appropriate
// size at an address composed from the bus, devfn and offset.
#define HAL_PCI_CFG_READ_UINT8( __bus, __devfn, __offset, __val )  \
    __val = cyg_hal_plf_pci_cfg_read_byte((__bus),  (__devfn), (__offset))
    
#define HAL_PCI_CFG_READ_UINT16( __bus, __devfn, __offset, __val ) \
    __val = cyg_hal_plf_pci_cfg_read_word((__bus),  (__devfn), (__offset))

#define HAL_PCI_CFG_READ_UINT32( __bus, __devfn, __offset, __val ) \
    __val = cyg_hal_plf_pci_cfg_read_dword((__bus),  (__devfn), (__offset))

// Write a value to the PCI configuration space of the appropriate
// size at an address composed from the bus, devfn and offset.
#define HAL_PCI_CFG_WRITE_UINT8( __bus, __devfn, __offset, __val )  \
    cyg_hal_plf_pci_cfg_write_byte((__bus),  (__devfn), (__offset), (__val))

#define HAL_PCI_CFG_WRITE_UINT16( __bus, __devfn, __offset, __val ) \
    cyg_hal_plf_pci_cfg_write_word((__bus),  (__devfn), (__offset), (__val))

#define HAL_PCI_CFG_WRITE_UINT32( __bus, __devfn, __offset, __val ) \
    cyg_hal_plf_pci_cfg_write_dword((__bus),  (__devfn), (__offset), (__val))

// Read/write data to PCI IO space
#if 0

extern void cyg_hal_plf_pci_io_write_byte (cyg_uint32 addr, cyg_uint8 data);
extern void cyg_hal_plf_pci_io_write_word (cyg_uint32 addr, cyg_uint16 data);
extern void cyg_hal_plf_pci_io_write_dword (cyg_uint32 addr, cyg_uint32 data);
extern cyg_uint8 cyg_hal_plf_pci_io_read_byte (cyg_uint32 addr);
extern cyg_uint16 cyg_hal_plf_pci_io_read_word (cyg_uint32 addr);
extern cyg_uint32 cyg_hal_plf_pci_io_read_dword (cyg_uint32 addr);

#define HAL_PCI_IO_READ_UINT8(addr, datum)   datum = cyg_hal_plf_pci_io_read_byte((cyg_uint32)addr)
#define HAL_PCI_IO_READ_UINT16(addr, datum)  datum = cyg_hal_plf_pci_io_read_word((cyg_uint32)addr)
#define HAL_PCI_IO_READ_UINT32(addr, datum)  datum = cyg_hal_plf_pci_io_read_dword((cyg_uint32)addr)
#define HAL_PCI_IO_WRITE_UINT8(addr, datum)  cyg_hal_plf_pci_io_write_byte((cyg_uint32)addr, datum)
#define HAL_PCI_IO_WRITE_UINT16(addr, datum) cyg_hal_plf_pci_io_write_word((cyg_uint32)addr, datum)
#define HAL_PCI_IO_WRITE_UINT32(addr, datum) cyg_hal_plf_pci_io_write_dword((cyg_uint32)addr, datum)
#endif

// Translate the PCI interrupt requested by the device (INTA#, INTB#,
// INTC# or INTD#) to the associated CPU interrupt (i.e., HAL vector).
#define HAL_PCI_TRANSLATE_INTERRUPT( __bus, __devfn, __vec, __valid)          \
    CYG_MACRO_START                                                           \
    cyg_uint8 __req;                                                          \
    HAL_PCI_CFG_READ_UINT8(__bus, __devfn, CYG_PCI_CFG_INT_PIN, __req);       \
    if (0 != __req) {                                                         \
        CYG_ADDRWORD __translation[4] = {                                     \
            CYGNUM_HAL_INTERRUPT_PCIC,                                        \
            CYGNUM_HAL_INTERRUPT_PCIB,                                        \
            CYGNUM_HAL_INTERRUPT_PCIA,                                        \
            CYGNUM_HAL_INTERRUPT_PCID};                                       \
                                                                              \
        __vec = __translation[((__req+CYG_PCI_DEV_GET_DEV(__devfn))&3)];      \
        __valid = true;                                                       \
    } else {                                                                  \
        /* Device will not generate interrupt requests. */                    \
        __valid = false;                                                      \
    }                                                                         \
    CYG_MACRO_END


// Can only do local bus (I think, my Japanese isn't good enough to be sure :)
// Ignore all but the first function on the SD0001
#define HAL_PCI_IGNORE_DEVICE(__bus, __dev, __fn)         \
 ((0 != __bus)                                            \
  || ((0 == __dev) && (0 != __fn)))

// Bus address translation macros
#define HAL_PCI_CPU_TO_BUS(__cpu_addr, __bus_addr)   \
    CYG_MACRO_START                                  \
    (__bus_addr) = CYGARC_BUS_ADDRESS(__cpu_addr);   \
    CYG_MACRO_END

#define HAL_PCI_BUS_TO_CPU(__bus_addr, __cpu_addr)        \
    CYG_MACRO_START                                       \
    (__cpu_addr) = CYGARC_UNCACHED_ADDRESS(__bus_addr);   \
    CYG_MACRO_END
    

//-----------------------------------------------------------------------------
// end of plf_io.h
#endif // CYGONCE_PLF_IO_H