//==========================================================================
//
//      twr_k40x256_misc.c
//
//      Cortex-M4 TWR-K40X256 EVAL HAL functions
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 2011 Free Software Foundation, 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     
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// version.                                                                 
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
//
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// along with eCos; if not, write to the Free Software Foundation, Inc.,    
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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   
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// must still be made available in accordance with section (3) of the GNU   
// General Public License v2.                                               
//
// This exception does not invalidate any other reasons why a work based    
// on this file might be covered by the GNU General Public License.         
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// ####ECOSGPLCOPYRIGHTEND####                                              
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):      ilijak
// Contributor(s):
// Date:           2011-02-05
// Description:
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <pkgconf/hal.h>
#include <pkgconf/hal_cortexm.h>
#include <pkgconf/hal_cortexm_kinetis.h>
#include <pkgconf/hal_cortexm_kinetis_twr_k40x256.h>
#ifdef CYGPKG_KERNEL
#include <pkgconf/kernel.h>
#endif

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

#include <cyg/hal/hal_arch.h>           // HAL header
#include <cyg/hal/hal_intr.h>           // HAL header

static inline void hal_gpio_init(void);

// DATA and BSS locations
__externC cyg_uint32 __ram_data_start;
__externC cyg_uint32 __ram_data_end;
__externC cyg_uint32 __rom_data_start;
__externC cyg_uint32 __sram_data_start;
__externC cyg_uint32 __sram_data_end;
__externC cyg_uint32 __srom_data_start;
__externC cyg_uint32 __bss_start;
__externC cyg_uint32 __bss_end;

//==========================================================================
// System init
//
// This is run to set up the basic system, including GPIO setting,
// clock feeds, power supply, and memory initialization. This code
// runs before the DATA is copied from ROM and the BSS cleared, hence
// it cannot make use of static variables or data tables.

__externC void CYGOPT_HAL_KINETIS_MISC_FLASH_SECTION_ATTR
hal_system_init( void )
{
#if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_SRAM)
    hal_wdog_disable();
    hal_gpio_init();
    hal_start_clocks();
#endif
#if defined(CYG_HAL_STARTUP_SRAM) && !defined(CYGHWR_HAL_CORTEXM_KINETIS_SRAM_UNIFIED)
    // Note: For CYG_HAL_STARTUP_SRAM, the SRAM_L bank simulates ROM
    // Relocate data from ROM to RAM
    {
        register cyg_uint32 *ram_p, *rom_p;
        for( ram_p = &__ram_data_start, rom_p = &__rom_data_start;
             ram_p < &__ram_data_end;
             ram_p++, rom_p++ )
            *ram_p = *rom_p;
    }

    // Relocate data from ROM to SRAM
    {
        register cyg_uint32 *ram_p, *sram_p;
        for( ram_p = &__sram_data_start, sram_p = &__srom_data_start;
             ram_p < &__sram_data_end;
             ram_p++, sram_p++ )
            *ram_p = *sram_p;
    }
#endif
}

//===========================================================================
// hal_gpio_init
//===========================================================================
static inline void CYGOPT_HAL_KINETIS_MISC_FLASH_SECTION_ATTR
hal_gpio_init(void)
{
    cyghwr_hal_kinetis_sim_t *sim_p = CYGHWR_HAL_KINETIS_SIM_P;
    cyghwr_hal_kinetis_mpu_t *mpu_p = CYGHWR_HAL_KINETIS_MPU_P;

    // Enable clocks on all ports.
    sim_p->scgc1 = CYGHWR_HAL_KINETIS_SIM_SCGC1_ALL_M;
    sim_p->scgc2 = CYGHWR_HAL_KINETIS_SIM_SCGC2_ALL_M;
    sim_p->scgc3 = CYGHWR_HAL_KINETIS_SIM_SCGC3_ALL_M;
    sim_p->scgc4 = CYGHWR_HAL_KINETIS_SIM_SCGC4_ALL_M;
    sim_p->scgc5 = CYGHWR_HAL_KINETIS_SIM_SCGC5_ALL_M;
    sim_p->scgc6 = CYGHWR_HAL_KINETIS_SIM_SCGC6_ALL_M;
    sim_p->scgc7 = CYGHWR_HAL_KINETIS_SIM_SCGC7_ALL_M;

    // Disable MPU
    mpu_p->cesr = 0;
}

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

__externC void hal_platform_init( void )
{
}

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

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

#include CYGHWR_MEMORY_LAYOUT_H

//--------------------------------------------------------------------------
// Accesses to areas not backed by real devices or memory can cause
// the CPU to hang.
//
// The following table defines the memory areas that GDB is allowed to
// touch. All others are disallowed.
// This table needs to be kept up to date with the set of memory areas
// that are available on the board.

static struct {
    CYG_ADDRESS         start;          // Region start address
    CYG_ADDRESS         end;            // End address (last byte)
} hal_data_access[] =
{
    { CYGMEM_REGION_ram,        CYGMEM_REGION_ram+CYGMEM_REGION_ram_SIZE-1      },      // Main RAM
#ifdef CYGMEM_REGION_sram
    { CYGMEM_REGION_sram,       CYGMEM_REGION_sram+CYGMEM_REGION_sram_SIZE-1    },      // On-chip SRAM
#endif
#ifdef CYGMEM_REGION_flash
    { CYGMEM_REGION_flash,      CYGMEM_REGION_flash+CYGMEM_REGION_flash_SIZE-1  },      // On-chip flash
#endif
#ifdef CYGMEM_REGION_rom
    { CYGMEM_REGION_rom,        CYGMEM_REGION_rom+CYGMEM_REGION_rom_SIZE-1      },      // External flash
#endif
#ifdef CYGMEM_REGION_flexnvm
    { CYGMEM_REGION_flexnvm,    CYGMEM_REGION_flexnvm+CYGMEM_REGION_flexnvm_SIZE-1  },  // On-chip flexnvm (DFlash)
#endif
#ifdef CYGMEM_REGION_flexram
    { CYGMEM_REGION_flexram,    CYGMEM_REGION_flexram+CYGMEM_REGION_flexram_SIZE-1  },  // On-chip flexram
#endif
#ifdef CYGMEM_REGION_eeeprom0
    { CYGMEM_REGION_eeeprom0,    CYGMEM_REGION_eeeprom0+CYGMEM_REGION_eeeprom0_SIZE-1  },  // On-chip Enhanced EEPROM
#endif
#ifdef CYGMEM_REGION_eeeprom1
    { CYGMEM_REGION_eeeprom1,    CYGMEM_REGION_eeeprom0+CYGMEM_REGION_eeeprom1_SIZE-1  },  // On-chip Enhanced EEPROM
#endif
    { 0xE0000000,               0x00000000-1                                    },      // Cortex-M peripherals
    { 0x40000000,               0x60000000-1                                    },      // Chip specific peripherals
};

__externC int cyg_hal_stub_permit_data_access( CYG_ADDRESS addr, cyg_uint32 count )
{
    int i;
    for( i = 0; i < sizeof(hal_data_access)/sizeof(hal_data_access[0]); i++ ) {
        if( (addr >= hal_data_access[i].start) &&
            (addr+count) <= hal_data_access[i].end)
            return true;
    }
    return false;
}

#endif // CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

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

#ifdef CYGPKG_REDBOOT
#include <redboot.h>
#include CYGHWR_MEMORY_LAYOUT_H

//--------------------------------------------------------------------------
// Memory layout
//
// We report the on-chip SRAM and external SRAM.

void
cyg_plf_memory_segment(int seg, unsigned char **start, unsigned char **end)
{
    switch (seg) {
    case 0:
        *start = (unsigned char *)CYGMEM_REGION_ram;
        *end = (unsigned char *)(CYGMEM_REGION_ram + CYGMEM_REGION_ram_SIZE);
        break;
#ifdef CYGMEM_REGION_sram
#define CASE_CYGMEM_REGION_SRAM 1
    case CASE_CYGMEM_REGION_SRAM:
        *start = (unsigned char *)CYGMEM_REGION_sram;
        *end = (unsigned char *)(CYGMEM_REGION_sram + CYGMEM_REGION_sram_SIZE);
        break;
#else
#define CASE_CYGMEM_REGION_SRAM 0
#endif
#ifdef CYGMEM_REGION_flexram
#define CASE_CYGMEM_REGION_FLEXRAM (CASE_CYGMEM_REGION_SRAM + 1)
    case CASE_CYGMEM_REGION_FLEXRAM:
        *start = (unsigned char *)CYGMEM_REGION_flexram;
        *end = (unsigned char *)(CYGMEM_REGION_flexram +
                                 CYGMEM_REGION_flexram_SIZE);
        break;
#else
#define CASE_CYGMEM_REGION_FLEXRAM (CASE_CYGMEM_REGION_SRAM)
#endif
    default:
        *start = *end = NO_MEMORY;
        break;
    }
} // cyg_plf_memory_segment()

#endif // CYGPKG_REDBOOT

//==========================================================================
// EOF twr_k40x256_misc.c
