##=============================================================================
##
##      ec555.S
##
##      ec555 board hardware setup
##
##=============================================================================
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# -------------------------------------------
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##=============================================================================
#######DESCRIPTIONBEGIN####
##
## Author(s):   Bob Koninckx
## Contributors:Bob Koninckx
## Date:        2002-01-01
## Purpose:     ec555 board hardware setup
## Description: This file contains any code needed to initialize the
##              hardware on a ec555 mpc555 board.
##
######DESCRIPTIONEND####
##
##=============================================================================

#include <pkgconf/hal.h>
        
#include <cyg/hal/ppc_regs.h>
#include <cyg/hal/arch.inc>

#------------------------------------------------------------------------------
                
        .globl  hal_hardware_init
hal_hardware_init:
#if defined(CYGPKG_HAL_POWERPC_EC555) && defined(CYGPKG_HAL_POWERPC_MPC5xx)
        lwi     r3, CYGARC_REG_IMM_BASE             # Base address of control registers

        // Burst enable
        lwi     r0, 0x00002000
        mtspr   560, r0
       
        // Disable the Watchdog (for now)
        lwi     r4, 0xffffff88
        stw     r4, (CYGARC_REG_IMM_SYPCR-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0x00000000
        stw     r4, (CYGARC_REG_IMM_SIUMCR-CYGARC_REG_IMM_BASE)(r3)

        // Unlock locked registers
        lwi     r4, 0x55ccaa33
        stw     r4, (CYGARC_REG_IMM_TBSCRK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_TBREF0K-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_TBREF1K-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_TBK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_RTCSCK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_RTCK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_RTSECK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_RTCALK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_PISCRK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_PITCK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_SCCRK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_PLPRCRK-CYGARC_REG_IMM_BASE)(r3)
        stw     r4, (CYGARC_REG_IMM_RSRK-CYGARC_REG_IMM_BASE)(r3)

        // Boost the clock to 40MHz
        lwi     r4, 0x03000000
        stw     r4, (CYGARC_REG_IMM_SCCR-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0x009150c0
        stw     r4, (CYGARC_REG_IMM_PLPRCR-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0x0080
        sth     r4, (CYGARC_REG_IMM_COLIR-CYGARC_REG_IMM_BASE)(r3)

        // Set up the memory map
        // Do NOT write protect the flash memory, flash drivers won't work 
        // if we do
        lwi     r4, 0x00800003
        stw     r4, (CYGARC_REG_IMM_BR0-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0xffc00530
        stw     r4, (CYGARC_REG_IMM_OR0-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0x00400011
        stw     r4, (CYGARC_REG_IMM_BR1-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0xfff00000
        stw     r4, (CYGARC_REG_IMM_OR1-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0x00c00000
        stw     r4, (CYGARC_REG_IMM_BR2-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0xffff8000
        stw     r4, (CYGARC_REG_IMM_OR2-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0x00e00000
        stw     r4, (CYGARC_REG_IMM_BR3-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0xffff8000
        stw     r4, (CYGARC_REG_IMM_OR3-CYGARC_REG_IMM_BASE)(r3)

#if defined(CYGSEM_HAL_POWERPC_MPC5XX_IFLASH_DUAL_MAP)
        lwi     r4, 1
#else
        lwi     r4, 0
#endif
        stw     r4, (CYGARC_REG_IMM_DMBR-CYGARC_REG_IMM_BASE)(r3)
        lwi     r4, 0
        stw     r4, (CYGARC_REG_IMM_DMOR-CYGARC_REG_IMM_BASE)(r3)

        // Enable the time base and set the freeze flag
        lwi     r4, 0xc3
        sth     r4, (CYGARC_REG_IMM_TBSCR-CYGARC_REG_IMM_BASE)(r3)

        // RTC is clocked by 4MHz crystal, set the freeze flag
        lwi     r4, 0xd2
        sth     r4, (CYGARC_REG_IMM_RTCSC-CYGARC_REG_IMM_BASE)(r3)

        // Set the freeze flag for the Periodic interrupt timer
        lwi     r4, 0x82
        sth     r4, (CYGARC_REG_IMM_PISCR-CYGARC_REG_IMM_BASE)(r3)

        // USIU rest.
        lwi     r4, 0x00000000
        lwi     r5, (CYGARC_REG_IMM_SGPIODT1-CYGARC_REG_IMM_BASE)
        stwx    r4, r3, r5
        lwi     r5, (CYGARC_REG_IMM_SGPIODT2-CYGARC_REG_IMM_BASE)
        stwx    r4, r3, r5
        lwi     r5, (CYGARC_REG_IMM_SGPIOCR-CYGARC_REG_IMM_BASE)
        stwx    r4, r3, r5
        lwi     r4, 0x00000ac6
        lwi     r5, (CYGARC_REG_IMM_EMCR-CYGARC_REG_IMM_BASE)
        stwx    r4, r3, r5

        // Dual ported TPU RAM
        lwi     r4, 0x0000
        lwi     r5, (CYGARC_REG_IMM_DPTMCR-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5

        lwi     r4, 0xffa0
        lwi     r5, (CYGARC_REG_IMM_RAMBAR-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5

        lwi     r4, 0x00
        lwi     r5, (CYGARC_REG_IMM_PORTQS-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5

        lwi     r4, 0x00
        lwi     r5, (CYGARC_REG_IMM_PQSPAR_DDRQST-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5
        lwi     r5, (CYGARC_REG_IMM_MPIOSMDR-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5
        lwi     r5, (CYGARC_REG_IMM_MPIOSMDDR-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5
        lwi     r5, (CYGARC_REG_IMM_SRAMMCR_A-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5
        
        // They are assigned OCD functionality on this board
        // Change the following to anything else  and BDM will not work anymore
        // on the ec555. This is not true for all MPC555 based boards, eg. cme555
        // does not have this requirement
        lwi     r4, 0x3
        lwi     r5, (CYGARC_REG_IMM_MIOS1TPCR-CYGARC_REG_IMM_BASE)
        sthx    r4, r3, r5

        // Enable 32 interrupt priorities on the IMB3 unit
        lwi     r4, 0x60000000
        lwi     r5, (CYGARC_REG_IMM_UMCR-CYGARC_REG_IMM_BASE)
        stwx    r4, r3, r5

        // Finally, disable serialization
        // Motorola claims that failing to do so results in a performance 
        // penalty of a facor three !!
        lwi     r0, 0x00000007
        mtspr   158, r0
#endif                
        sync
        blr

#------------------------------------------------------------------------------
# end of ec555.S
