Subversion Repositories openrisc

//==========================================================================

//

//      plf_misc.c

//

//      HAL platform miscellaneous functions

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    jskov

// Contributors: jskov

// Date:         2000-11-30

// Purpose:      HAL miscellaneous functions

// Description:  This file contains miscellaneous functions provided by the

//               HAL.

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>         // Base types

#include <cyg/hal/hal_arch.h>           // architectural definitions

#include <cyg/hal/hal_intr.h>           // Interrupt handling

#include <cyg/hal/hal_if.h>             // Calling interface definitions

#if defined(CYGPKG_IO_PCI)

#include <cyg/io/pci_hw.h>

#include <cyg/io/pci.h>

#endif

//--------------------------------------------------------------------------

void hal_platform_init(void)

{

    hal_if_init();

    // FIXME: Set up Galileo interrupt controller?

    // Unmask vectors which are entry points for interrupt controllers

//    HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_21555);

//    HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_GALILEO);

}

//--------------------------------------------------------------------------

// PCI support

#if defined(CYGPKG_IO_PCI)

static int __check_bar(cyg_uint32 addr, cyg_uint32 size)

{

    int n;

    for (n = 0; n <= 31; n++)

        if (size == (1 << n)) {

            /* Check that address is naturally aligned */

            if (addr != (addr & ~(size-1)))

                return 0;

            return size - 1;

        }

    return 0;

}

// One-time PCI initialization.

void cyg_hal_plf_pci_init(void)

{

    cyg_uint32 bar_ena, start10, start32, end, size;

    cyg_uint8  next_bus;

    // Program PCI window in CPU address space and CPU->PCI remap

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCIMEM0_LD_OFFSET,

                       HAL_OCELOT_PCI_MEM0_BASE >> HAL_GALILEO_CPU_DECODE_SHIFT);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCIMEM0_HD_OFFSET,

                       (HAL_OCELOT_PCI_MEM0_BASE+HAL_OCELOT_PCI_MEM0_SIZE-1) >> HAL_GALILEO_CPU_DECODE_SHIFT);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCIMEM1_LD_OFFSET,

                       HAL_OCELOT_PCI_MEM1_BASE >> HAL_GALILEO_CPU_DECODE_SHIFT);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCIMEM1_HD_OFFSET,

                       (HAL_OCELOT_PCI_MEM1_BASE+HAL_OCELOT_PCI_MEM1_SIZE-1) >> HAL_GALILEO_CPU_DECODE_SHIFT);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCIIO_LD_OFFSET,

                       HAL_OCELOT_PCI_IO_BASE >> HAL_GALILEO_CPU_DECODE_SHIFT);

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCIIO_HD_OFFSET,

                       (HAL_OCELOT_PCI_IO_BASE+HAL_OCELOT_PCI_IO_SIZE-1) >> HAL_GALILEO_CPU_DECODE_SHIFT);

    // Setup for bus mastering

    cyg_hal_plf_pci_cfg_write_dword(0, CYG_PCI_DEV_MAKE_DEVFN(0,0),

                                    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;

    // Allow PCI bus to access local memory

    // Check for active SCS10

    start10 = HAL_GALILEO_GETREG(HAL_GALILEO_SCS10_LD_OFFSET) << HAL_GALILEO_CPU_DECODE_SHIFT;

    end   = ((HAL_GALILEO_GETREG(HAL_GALILEO_SCS10_HD_OFFSET) & 0x7f) + 1) << HAL_GALILEO_CPU_DECODE_SHIFT;

    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) << HAL_GALILEO_CPU_DECODE_SHIFT;

    end   = ((HAL_GALILEO_GETREG(HAL_GALILEO_SCS32_HD_OFFSET) & 0x7f) + 1) << HAL_GALILEO_CPU_DECODE_SHIFT;

    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);

    // 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_dword;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,

                       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |

                       (bus << 16) | (devfn << 8) | offset);

    HAL_GALILEO_GETPCI(bus, devfn,

                       HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    if (pci_config_errcheck())

        return 0xffffffff;

    return config_dword;

}

cyg_uint16 cyg_hal_plf_pci_cfg_read_word (cyg_uint32 bus,

                                          cyg_uint32 devfn,

                                          cyg_uint32 offset)

{

    cyg_uint32 config_dword;

    cyg_uint16 config_word;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,

                       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |

                       (bus << 16) | (devfn << 8) | (offset & ~3));

    HAL_GALILEO_GETPCI(bus, devfn,

                       HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    config_word = (cyg_uint16)((config_dword >> ((offset & 3) * 8)) & 0xffff);

    if (pci_config_errcheck())

        return 0xffff;

    return config_word;

}

cyg_uint8 cyg_hal_plf_pci_cfg_read_byte (cyg_uint32 bus,

                                         cyg_uint32 devfn,

                                         cyg_uint32 offset)

{

    cyg_uint32 config_dword;

    cyg_uint8 config_byte;

    HAL_GALILEO_PUTREG(HAL_GALILEO_PCI0_CONFIG_ADDR_OFFSET,

                       HAL_GALILEO_PCI0_CONFIG_ADDR_ENABLE |

                       (bus << 16) | (devfn << 8) | (offset & ~3));

    HAL_GALILEO_GETPCI(bus, devfn,

                       HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    config_byte = (cyg_uint8)((config_dword >> ((offset & 3) * 8)) & 0xff);

    if (pci_config_errcheck())

        return 0xff;

    return config_byte;

}

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_PUTPCI(bus, devfn,

                       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));

    HAL_GALILEO_GETPCI(bus, devfn,

                       HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    if (pci_config_errcheck())

        return;

    shift = (offset & 3) * 8;

    config_dword &= ~(0xffff << shift);

    config_dword |= (data << shift);

    HAL_GALILEO_PUTPCI(bus, devfn,

                       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));

    HAL_GALILEO_GETPCI(bus, devfn,

                       HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    if (pci_config_errcheck())

        return;

    shift = (offset & 3) * 8;

    config_dword &= ~(0xff << shift);

    config_dword |= (data << shift);

    HAL_GALILEO_PUTPCI(bus, devfn,

                       HAL_GALILEO_PCI0_CONFIG_DATA_OFFSET, config_dword);

    (void)pci_config_errcheck();

}

#endif // CYGPKG_IO_PCI

//--------------------------------------------------------------------------

// End of plf_misc.c