flexanet_misc.c

开放源码实时操作系统源码.

//==========================================================================
//
//      flexanet_misc.c
//
//      HAL misc board support code for StrongARM SA1110/Flexanet
//
//==========================================================================
//####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):    Jordi Colomer
// Contributors: Jordi Colomer <[e-mail]>
// Date:         2001-06-15
// Purpose:      HAL board support
// Description:  Implementations of HAL board interfaces
//
//####DESCRIPTIONEND####
//
//========================================================================*/

#include <pkgconf/hal.h>
#include <pkgconf/system.h>
#include CYGBLD_HAL_PLATFORM_H

#include <cyg/infra/cyg_type.h>         // base types
#include <cyg/infra/cyg_trac.h>         // tracing macros
#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_io.h>             // IO macros
#include <cyg/hal/hal_arch.h>           // Register state info
#include <cyg/hal/hal_diag.h>
#include <cyg/hal/hal_intr.h>           // Interrupt names
#include <cyg/hal/hal_cache.h>
#include <cyg/hal/hal_sa11x0.h>         // Hardware definitions
#include <cyg/hal/flexanet.h>            // Platform specifics

#include <cyg/infra/diag.h>             // diag_printf

// All the MM table layout is here:
#include <cyg/hal/hal_mm.h>

#include <string.h> // memset

void
hal_mmu_init(void)
{
    unsigned long ttb_base = SA11X0_RAM_BANK0_BASE + 0x4000;
    unsigned long i;

    /*
     * Set the TTB register
     */
    asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb_base) /*:*/);

    /*
     * Set the Domain Access Control Register
     */
    i = ARM_ACCESS_DACR_DEFAULT;
    asm volatile ("mcr  p15,0,%0,c3,c0,0" : : "r"(i) /*:*/);

    /*
     * First clear all TT entries - ie Set them to Faulting
     */
    memset((void *)ttb_base, 0, ARM_FIRST_LEVEL_PAGE_TABLE_SIZE);

    /*               Actual  Virtual  Size   Attributes                                                    Function  */
    /*	             Base     Base     MB      cached?           buffered?        access permissions                 */
    /*             xxx00000  xxx00000                                                                                */
    X_ARM_MMU_SECTION(0x000,  0x500,    32,  ARM_CACHEABLE,   ARM_BUFFERABLE,   ARM_ACCESS_PERM_RW_RW); /* Boot flash ROMspace */
    X_ARM_MMU_SECTION(0x100,  0x100,   128,  ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* Core Board Registers */
    X_ARM_MMU_SECTION(0x180,  0x180,    16,  ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* Ethernet Adaptor */
    X_ARM_MMU_SECTION(0x200,  0x200,   512,  ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* PCMCIA Socket A */
    X_ARM_MMU_SECTION(0x300,  0x300,   512,  ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* PCMCIA Sockets B */
    X_ARM_MMU_SECTION(0x800,  0x800, 0x400,  ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* StrongARM(R) Registers */
    X_ARM_MMU_SECTION(0xC00,      0,    32,  ARM_CACHEABLE,   ARM_BUFFERABLE,   ARM_ACCESS_PERM_RW_RW); /* DRAM Bank 0 */
    X_ARM_MMU_SECTION(0xC00,  0xC00,    32,  ARM_UNCACHEABLE, ARM_BUFFERABLE,   ARM_ACCESS_PERM_RW_RW); /* DRAM Bank 0 */
    X_ARM_MMU_SECTION(0xE00,  0xE00,   128,  ARM_CACHEABLE,   ARM_BUFFERABLE,   ARM_ACCESS_PERM_RW_RW); /* Zeros (Cache Clean) Bank */

}

//
// Board control register support
//   Update the board control register (write only).  Only the bits
// specified by 'mask' are changed to 'value'.
//

void
flexanet_BCR(unsigned long mask, unsigned long value)
{
    _flexanet_BCR = (_flexanet_BCR & ~mask) | (mask & value);
    *SA1110_BOARD_CONTROL = _flexanet_BCR;
}

//
// Platform specific initialization
//

void
plf_hardware_init(void)
{
    // Force "alternate" use of GPIO pins used for LCD screen
    *SA11X0_GPIO_ALTERNATE_FUNCTION |= 0x000003FC;  // Bits 2..9
    *SA11X0_GPIO_PIN_DIRECTION |= 0x000003FC;  // Bits 2..9
    *SA11X0_GPIO_PIN_OUTPUT_CLEAR = 0x000003FC;  // Bits 2..9
    
    // Configure the ethernet GPIO interrupt to falling-edge
    HAL_INTERRUPT_CONFIGURE(SA1110_IRQ_GPIO_ETH, 0, 0);    
}

#include CYGHWR_MEMORY_LAYOUT_H
typedef void code_fun(void);
void flexanet_program_new_stack(void *func)
{
    register CYG_ADDRESS stack_ptr asm("sp");
    register CYG_ADDRESS old_stack asm("r4");
    register code_fun *new_func asm("r0");
    old_stack = stack_ptr;
    stack_ptr = CYGMEM_REGION_ram + CYGMEM_REGION_ram_SIZE - sizeof(CYG_ADDRESS);
    new_func = (code_fun*)func;
    new_func();
    stack_ptr = old_stack;
    return;
}

// ------------------------------------------------------------------------
// EOF flexanet_misc.c