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#ifndef CYGONCE_HAL_PLATFORM_INC
#define CYGONCE_HAL_PLATFORM_INC
##=============================================================================
##
##      platform.inc
##
##      REFIDT334 board assembler header file
##
##=============================================================================
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## Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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##=============================================================================
#######DESCRIPTIONBEGIN####
##
## Author(s):    tmichals
## Contributors: nickg
## Date:         2003-02-13
## Purpose:      IDT32334 board definitions.
## Description:  This file contains various definitions and macros that are
##               useful for writing assembly code for the IDT32334 reference
##               board.
## Usage:
##               #include <cyg/hal/platform.inc>
##               ...
##              
##
######DESCRIPTIONEND####
##
##=============================================================================

#include <cyg/hal/mips.inc>

#------------------------------------------------------------------------------
# Monitor initialization.
        
#ifndef CYGPKG_HAL_MIPS_MON_DEFINED

#if     defined(CYG_HAL_STARTUP_ROM) ||                 \
        (       defined(CYG_HAL_STARTUP_RAM) &&         \
                !defined(CYGSEM_HAL_USE_ROM_MONITOR))
        
        # If we are starting up from ROM, or we are starting in
        # RAM and NOT using a ROM monitor, initialize the VSR table.

        .macro  hal_mon_init
        la      a0,__default_interrupt_vsr
        la      a1,__default_exception_vsr
        la      a3,hal_vsr_table
        sw      a0,0(a3)
        sw      a1,1*4(a3)
        sw      a1,2*4(a3)
        sw      a1,3*4(a3)
        sw      a1,4*4(a3)
        sw      a1,5*4(a3)
        sw      a1,6*4(a3)
        sw      a1,7*4(a3)
        sw      a1,8*4(a3)
        sw      a1,9*4(a3)
        sw      a1,10*4(a3)
        sw      a1,11*4(a3)
        sw      a1,12*4(a3)
        sw      a1,13*4(a3)
        sw      a1,14*4(a3)
        sw      a1,15*4(a3)

        sw      a1,32*4(a3)
        sw      a1,33*4(a3)
        .endm
        
#elif defined(CYG_HAL_STARTUP_RAM) && defined(CYGSEM_HAL_USE_ROM_MONITOR)

        # Initialize the VSR table entries
        # We only take control of the interrupt vector,
        # the rest are left to the ROM for now...

        .macro  hal_mon_init
        la      a0,__default_interrupt_vsr
        la      a3,hal_vsr_table
        sw      a0,0(a3)
        .endm

#else

        .macro  hal_mon_init
        .endm

#endif
                        

#define CYGPKG_HAL_MIPS_MON_DEFINED

#endif  

#------------------------------------------------------------------------------
# Decide whether the VSR table is defined externally, or is to be defined
# here.

#if defined(CYGPKG_HAL_MIPS_SIM) ||        \
    ( defined(CYGPKG_HAL_MIPS_TX3904) &&   \
      defined(CYG_HAL_STARTUP_RAM) &&      \
      !defined(CYGSEM_HAL_USE_ROM_MONITOR) \
    )

## VSR table defined in linker script

#else

#define CYG_HAL_MIPS_VSR_TABLE_DEFINED

#endif

#if defined(CYG_HAL_STARTUP_ROMRAM) || defined(CYG_HAL_STARTUP_ROM)
#ifndef CYGPKG_HAL_MIPS_MEMC_DEFINED

.macro  hal_memc_init
        .extern hal_memc_setup
        lar     t0,hal_memc_setup
        jalr    t0
        nop
#if defined(CYG_HAL_STARTUP_ROMRAM)
        

        # Having got the RAM working, we must now relocate the Entire
        # ROM into it and then continue execution from RAM.

        la      t0,0x80000000           # dest addr
        la      t1,0xbfc00000           # source addr
        la      t3,__ram_data_end       # end dest addr
1:      
        lw      v0,0(t1)                # get word
        addi    t1,t1,4
        sw      v0,0(t0)                # write word
        addi    t0,t0,4
        bne     t0,t3,1b
        nop

/* set up and move interrupts */

/* setup and move the vector table into ram */
/* This allows execptions to happen in ROM first
** then when running in RAM, they are switched */
        mfc0    v0, status
        nop
        li      v1, ~0x00400000
        and   v0, v0,v1
        mtc0    v0, status
        nop


        la      t0, hal_vsr_table
        la      t1,__default_interrupt_vsr

        sw      t1, 0(t0)

        la      t1,__default_exception_vsr
        li      t2, 62
        li      t3, 0
        addi    t0,t0,4
12:
        sw      t1,0(t0)
        addi    t3,t3,1
        addi    t0,t0,4
        bne     t3,t2, 12b
        nop

        la      v0,2f                   # RAM address to go to
        jr      v0
        nop
2:      
        # We are now executing out of RAM!
#endif

.endm
#define CYGPKG_HAL_MIPS_MEMC_DEFINED
#endif
#endif
#------------------------------------------------------------------------------
#endif // ifndef CYGONCE_HAL_PLATFORM_INC
# end of platform.inc