Subversion Repositories openrisc_2011-10-31

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

//

//        sdram0.cxx

//

//        SDRAM function test 0

//

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

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

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

//

// Author(s):     hmt

// Contributors:  hmt

// Date:          1999-11-11

// Description:   Basic memory test, knowledgeable of the EBSA285's

//                memory size.

//####DESCRIPTIONEND####

#include <cyg/infra/testcase.h>

#include <cyg/infra/diag.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/hal/hal_intr.h>

#define ONE_MEG (0x100000)

#define ONE_MEG_IN_WORDS (ONE_MEG/4)

#define MEGS 9

#define WORDS ONE_MEG_IN_WORDS

#define START 0x400000

#define INNERLOOPS 10

#define NUMTESTS 1

#if WORDS > ONE_MEG_IN_WORDS

# error "Too many WORDS in a block - they'll overlap!"

#endif

#include <cyg/hal/hal_ebsa285.h>

void

check_addrsize_setup( void )

{

    cyg_uint32 sizes[4] = { 0, };

    cyg_uint32 bases[4] = { 0, };

    cyg_uint32 codes[4] = { 0, };

    cyg_uint32 muxes[4] = { 0, };

    cyg_uint32 i;

#define MBytes <<20

    static cyg_uint32 lookup[] =

    { 0, 1 MBytes, 2 MBytes, 4 MBytes, 8 MBytes, 16 MBytes, 32 MBytes, 64 MBytes };

    static cyg_uint32 maxsizes[] =

    { 2 MBytes, 16 MBytes, 64 MBytes, 8 MBytes, 64 MBytes,  0, 0, 0 };

    codes[0] = *SA110_SDRAM_ADDRESS_SIZE_ARRAY_0;

    codes[1] = *SA110_SDRAM_ADDRESS_SIZE_ARRAY_1;

    codes[2] = *SA110_SDRAM_ADDRESS_SIZE_ARRAY_2;

    codes[3] = *SA110_SDRAM_ADDRESS_SIZE_ARRAY_3;

    // Print all the info for the benefit of humans:

    for ( i = 0; i < 4; i++ ) {

        bases[i] = 0x0ff00000 & codes[i];

        sizes[i] = lookup[ 7 & codes[i] ];

        muxes[i] = 7 & (codes[i] >> 4);

        diag_printf( "Bank %d: [%08x]: base %08x, size %08x; mux mode %d\n",

                     i, codes[i], bases[i] , sizes[i] , muxes[i] );

    }

    // THEN check individual entries for sanity

    for ( i = 0; i < 4; i++ ) {

        if ( 0 == sizes[i] ) {

            // then the bank is not in use

            CYG_TEST_CHECK( 0 == bases[i], "Unused bank nonzero address" );

            CYG_TEST_CHECK( 0 == muxes[i], "Unused bank nonzero mux mode" );

        } else {

            CYG_TEST_CHECK( muxes[i] <= 4, "Mux mode overflow" );

            if ( (muxes[i] == 3) && (8 != sizes[i]) )

                CYG_TEST_FAIL( "Mux mode 3 and size not 8Mb" );

            CYG_TEST_CHECK( maxsizes[ muxes[i] ] >= sizes[i],

                            "Size too larget for mux mode" );

        }

    }

    // NEXT check that addresses are singly mapped IYSWIM:

    // Easiest way is, foreach megabyte, check it is mapped exactly once;

    // shouldn't take too long.

    for ( i = 0; i < hal_dram_size; i += ONE_MEG ) {

        int j = 0;

        int k;

        for ( k = 0; k < 4; k++ )

            // this test works OK for an unused slot because i is +ve:

            if ( (bases[k] <= i) && (i < (bases[k] + sizes[k])) )

                j++;

        CYG_TEST_CHECK( 2 > j, "Good memory is multiply mapped" );

        CYG_TEST_CHECK( 0 < j, "Good memory is not mapped" );

    }

    for ( /* i */ ; i < 256 MBytes; i += ONE_MEG ) {

        int j = 0;

        int k;

        for ( k = 0; k < 4; k++ )

            // this test works OK for an unused slot because i is +ve:

            if ( (bases[k] <= i) && (i < (bases[k] + sizes[k])) )

                j++;

        CYG_TEST_CHECK( 2 > j,  "Non-existent memory is multiply mapped" );

        CYG_TEST_CHECK( 0 == j, "Non-existent memory is mapped" );

    }

    CYG_TEST_PASS( "Memory controller setup self-consistent" );

}

void mymain( void )

{

    cyg_uint32 h, i, j, k;

    cyg_uint32 *pbase[ MEGS ] = { 0, };

    int totaltests = 0;

    int ptotalerrors[ MEGS ] = { 0, };

    CYG_TEST_INIT();

    check_addrsize_setup();

    h = hal_dram_size - ONE_MEG;

    i = MEGS - 1;

    j = START;

    k = 0;

    while ( (i > k) && (h > j) ) {

        pbase[i] = (cyg_uint32 *)h;

        pbase[k] = (cyg_uint32 *)j;

        i--;

        k++;

        h -= ONE_MEG;

        j += ONE_MEG;

    }

    if ( (i == k) && (h > j) )

        pbase[ i ] = (cyg_uint32 *)((h+j)/2);

    for ( h = 0; h < NUMTESTS; h++ ) {

        int perrors[ MEGS ] = { 0, };

        cyg_uint32 pbadbits[ MEGS ] = { 0, };

        for ( i = 0 ; i < INNERLOOPS; i++ ) {

            cyg_uint32 d = 0xdeadbeef ^ ((cyg_uint32)i * 0x10001);

            for ( k = 0; k < MEGS; k++ ) {

                cyg_uint32 *p = pbase[k];

                cyg_uint32 dp = d ^ (cyg_uint32)p;

                if ( ! p ) continue;

                for ( j = 0; j < WORDS; j++ )

                    p[j] = dp ^ j ^ (j << 19) ;

            }

            for ( k = 0; k < MEGS; k++ ) {

                cyg_uint32 *p = pbase[k];

                cyg_uint32 dp = d ^ (cyg_uint32)p;

                if ( ! p ) continue;

                for ( j = 0; j < WORDS; j++ )

                    if ( p[j] != (dp ^ j ^ (j << 19)) ) {

                        perrors[k]++;

                        pbadbits[k] |= (p[j] ^ dp ^ j ^ (j << 19));

                    }

            }

        }

        totaltests += i * j;

        for ( k = 0; k < MEGS; k++ ) {

            if ( ! pbase[k] ) continue;

            ptotalerrors[k] += perrors[k];

            diag_printf(

"p %x: %d tests of %d words: %d errors, badbits %x ...totals %d tests %d errors\n",

 pbase[k], i,      j,      perrors[k], pbadbits[k],  totaltests, ptotalerrors[k] );

            if ( 0 != perrors[k] )

                CYG_TEST_FAIL( "Errors in memory test" );

        }

    }

    h = j = 0;

    for ( k = 0; k < MEGS; k++ ) {

        if ( ! pbase[k] ) continue;

        h += ptotalerrors[k] ;

        j += totaltests;

    }

    diag_printf( "Total tests %d, total errors %d\n", j, h );

    if ( 0 == h )

        CYG_TEST_PASS( "Memory test all OK" );

    CYG_TEST_EXIT("End of mem test");

}

externC void

cyg_start( void )

{

    HAL_ENABLE_INTERRUPTS();

#ifdef CYGPKG_HAL_ARM_EBSA285

    cyg_uint32 i;

    i = *(cyg_uint32 *)(0x42000000 + 0x10c);

    diag_printf( "SDRAM timing %08x\n", i );

    for ( i = 0; i < 4; i++ ) {

        diag_printf( "Bank %d: addrsize %08x\n", i, *(cyg_uint32 *)(0x42000000 + 0x110 + i * 4 ));

    }

    diag_printf( "Mem size: %08x == %d\n", hal_dram_size, hal_dram_size );

#endif

    mymain();

}

// EOF sdram0.cxx