plf_misc.c

开放源码实时操作系统源码.

				    CYG_PCI_CFG_COMMAND,
				    CYG_PCI_CFG_COMMAND_IO |
				    CYG_PCI_CFG_COMMAND_MEMORY |
				    CYG_PCI_CFG_COMMAND_MASTER |
				    CYG_PCI_CFG_COMMAND_PARITY |
				    CYG_PCI_CFG_COMMAND_SERR);

    // Setup latency timer field
    cyg_hal_plf_pci_cfg_write_byte(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
				   CYG_PCI_CFG_LATENCY_TIMER, 6);

    // Disable all BARs
    bar_ena = 0x1ff;

    // Check for active SCS10
    start10 = HAL_GALILEO_GETREG(HAL_GALILEO_SCS10_LD_OFFSET) << 21;
    end   = ((HAL_GALILEO_GETREG(HAL_GALILEO_SCS10_HD_OFFSET) & 0x7f) + 1) << 21;
    if (end > start10) {
	if ((size = __check_bar(start10, end - start10)) != 0) {
	    // Enable BAR
	    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_SCS10_SIZE_OFFSET, size);
	    bar_ena &= ~HAL_GALILEO_BAR_ENA_SCS10;
	}
    }

    // Check for active SCS32
    start32 = HAL_GALILEO_GETREG(HAL_GALILEO_SCS32_LD_OFFSET) << 21;
    end   = ((HAL_GALILEO_GETREG(HAL_GALILEO_SCS32_HD_OFFSET) & 0x7f) + 1) << 21;
    if (end > start32) {
	if ((size = __check_bar(start32, end - start32)) != 0) {
	    // Enable BAR
	    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_SCS32_SIZE_OFFSET, size);
	    bar_ena &= ~HAL_GALILEO_BAR_ENA_SCS32;
	}
    }

    bar_ena &= ~HAL_GALILEO_BAR_ENA_SCS10;
    HAL_GALILEO_PUTREG(HAL_GALILEO_BAR_ENA_OFFSET, bar_ena);


    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
				    CYG_PCI_CFG_BAR_0, 0xffffffff);

    end = cyg_hal_plf_pci_cfg_read_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
					 CYG_PCI_CFG_BAR_0);
	
    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
				    CYG_PCI_CFG_BAR_0, start10);


    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
				    CYG_PCI_CFG_BAR_1, 0xffffffff);

    end = cyg_hal_plf_pci_cfg_read_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
					 CYG_PCI_CFG_BAR_1);

    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),
				    CYG_PCI_CFG_BAR_1, start32);


    // enable ISA bridge on PIIX4
    v = cyg_hal_plf_pci_cfg_read_dword(0, CYG_PCI_DEV_MAKE_DEVFN(_PIIX4_PCI_ID,_PIIX4_BRIDGE),
                                       CYG_PCI_CFG_PIIX4_GENCFG);
    v |= CYG_PCI_CFG_PIIX4_GENCFG_ISA;
    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(_PIIX4_PCI_ID,_PIIX4_BRIDGE),
                                    CYG_PCI_CFG_PIIX4_GENCFG, v);
        

    v = cyg_hal_plf_pci_cfg_read_byte(0, CYG_PCI_DEV_MAKE_DEVFN(_PIIX4_PCI_ID,_PIIX4_BRIDGE),
                                      CYG_PCI_CFG_PIIX4_TOM);
    v &= ~CYG_PCI_CFG_PIIX4_TOM_TOM_MASK;
    v |= CYG_PCI_CFG_PIIX4_TOM_TOM_16M;
    cyg_hal_plf_pci_cfg_write_byte(0, CYG_PCI_DEV_MAKE_DEVFN(_PIIX4_PCI_ID,_PIIX4_BRIDGE),
                                   CYG_PCI_CFG_PIIX4_TOM, v);

    cyg_pci_init();
    // Configure PCI bus.
    next_bus = 1;
    cyg_pci_configure_bus(0, &next_bus);
}


// Check for configuration error.
static int pci_config_errcheck(void)
{
    cyg_uint32  irq;

    // Check for master or target abort
    irq = HAL_GALILEO_GETREG(HAL_GALILEO_IRQ_CAUSE_OFFSET);

    if (irq & (HAL_GALILEO_IRQCAUSE_MASABT | HAL_GALILEO_IRQCAUSE_TARABT)) {
	// Error. Clear bits.
	HAL_GALILEO_PUTREG(HAL_GALILEO_IRQ_CAUSE_OFFSET,
			   ~(HAL_GALILEO_IRQCAUSE_MASABT | HAL_GALILEO_IRQCAUSE_TARABT));
        return 1;
    }
    return 0;
}

cyg_uint32 cyg_hal_plf_pci_cfg_read_dword (cyg_uint32 bus,
					   cyg_uint32 devfn,
					   cyg_uint32 offset)
{
    cyg_uint32 config_data;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,
		       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |
                       (bus << 16) | (devfn << 8) | offset);

    config_data = HAL_GALILEO_GETREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET);

    if (pci_config_errcheck())
	return 0xffffffff;
    return config_data;
}

cyg_uint16 cyg_hal_plf_pci_cfg_read_word (cyg_uint32 bus,
					  cyg_uint32 devfn,
					  cyg_uint32 offset)
{
    cyg_uint32 config_dword;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,
		       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |
		       (bus << 16) | (devfn << 8) | (offset & ~3));

    config_dword = HAL_GALILEO_GETREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET);

    if (pci_config_errcheck())
	return 0xffff;
    return (cyg_uint16)((config_dword >> ((offset & 3) * 8)) & 0xffff);
}

cyg_uint8 cyg_hal_plf_pci_cfg_read_byte (cyg_uint32 bus,
					 cyg_uint32 devfn,
					 cyg_uint32 offset)
{
    cyg_uint32 config_dword;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,
		       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |
		       (bus << 16) | (devfn << 8) | (offset & ~3));

    config_dword = HAL_GALILEO_GETREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET);

    if (pci_config_errcheck())
	return 0xff;
    return (cyg_uint8)((config_dword >> ((offset & 3) * 8)) & 0xff);
}

void cyg_hal_plf_pci_cfg_write_dword (cyg_uint32 bus,
				      cyg_uint32 devfn,
				      cyg_uint32 offset,
				      cyg_uint32 data)
{
    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,
		       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |
		       (bus << 16) | (devfn << 8) | offset);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, data);

    (void)pci_config_errcheck();
}

void cyg_hal_plf_pci_cfg_write_word (cyg_uint32 bus,
				     cyg_uint32 devfn,
				     cyg_uint32 offset,
				     cyg_uint16 data)
{
    cyg_uint32 config_dword, shift;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,
		       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |
		       (bus << 16) | (devfn << 8) | (offset & ~3));

    config_dword = HAL_GALILEO_GETREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET);
    if (pci_config_errcheck())
	return;

    shift = (offset & 3) * 8;
    config_dword &= ~(0xffff << shift);
    config_dword |= (data << shift);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    (void)pci_config_errcheck();
}

void cyg_hal_plf_pci_cfg_write_byte (cyg_uint32 bus,
				     cyg_uint32 devfn,
				     cyg_uint32 offset,
				     cyg_uint8  data)
{
    cyg_uint32 config_dword, shift;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,
		       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |
		       (bus << 16) | (devfn << 8) | (offset & ~3));

    config_dword = HAL_GALILEO_GETREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET);
    if (pci_config_errcheck())
	return;

    shift = (offset & 3) * 8;
    config_dword &= ~(0xff << shift);
    config_dword |= (data << shift);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    (void)pci_config_errcheck();
}
#endif  // defined(CYGPKG_IO_PCI)


/*------------------------------------------------------------------------*/
/* IDE support                                                            */

int
cyg_hal_plf_ide_init(void)
{
    cyg_uint32 v;

    // enable IDE
    v = cyg_hal_plf_pci_cfg_read_dword(0, CYG_PCI_DEV_MAKE_DEVFN(_PIIX4_PCI_ID,_PIIX4_IDE),
                                       CYG_PCI_CFG_PIIX4_IDETIM);
    v |= (CYG_PCI_CFG_PIIX4_IDETIM_IDE << 16) | CYG_PCI_CFG_PIIX4_IDETIM_IDE;
    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(_PIIX4_PCI_ID,_PIIX4_IDE),
                                    CYG_PCI_CFG_PIIX4_IDETIM, v);
    return HAL_IDE_NUM_CONTROLLERS;
}


/*------------------------------------------------------------------------*/
/* End of plf_misc.c                                                      */