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//////////////////////////////////////////////////////////////////////

////                                                              ////

////                                                              ////

//// OR1K configuration detection software                        ////

////                                                              ////

//// Description:                                                 ////

////             Determine capabilities of OR1K processor.        ////

////                                                              ////

//// Author(s):                                                   ////

////            Julius Baxter, julius@opencores.org               ////

////                                                              ////

//// TODO:                                                        ////

////      Add further tests for optional parts of OR1K.           ////

////                                                              ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (C) 2010 Authors and OPENCORES.ORG                 ////

////                                                              ////

//// This source file may be used and distributed without         ////

//// restriction provided that this copyright statement is not    ////

//// removed from the file and that any derivative work contains  ////

//// the original copyright notice and the associated disclaimer. ////

////                                                              ////

//// This source file is free software; you can redistribute it   ////

//// and/or modify it under the terms of the GNU Lesser General   ////

//// Public License as published by the Free Software Foundation; ////

//// either version 2.1 of the License, or (at your option) any   ////

//// later version.                                               ////

////                                                              ////

//// This source 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 Lesser General Public License for more ////

//// details.                                                     ////

////                                                              ////

//// You should have received a copy of the GNU Lesser General    ////

//// Public License along with this source; if not, download it   ////

//// from http://www.opencores.org/lgpl.shtml                     ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

#include "cpu-utils.h"

#include "spr-defs.h"

#include "board.h"

#include "uart.h"

#include "printf.h"

int illegal_instruction;

int

print_or1k_upr(unsigned long upr)

{

        if (!(SPR_UPR_UP & upr))

        {

                printf("UPR not present. Cannot determine present units\n");

                return 1;

        }

        printf("\nOptional units present:\n");

        if (upr & SPR_UPR_DCP)

                printf("Data Cache\n");

        if (upr & SPR_UPR_ICP)

                printf("Instruction Cache\n");

        if (upr & SPR_UPR_DMP)

                printf("Data MMU\n");

        if (upr & SPR_UPR_IMP)

                printf("Instruction MMU\n");

        if (upr & SPR_UPR_MP)

                printf("MAC Unit\n");

        if (upr & SPR_UPR_DUP)

                printf("Debug Unit\n");

        if (upr & SPR_UPR_PCUP)

                printf("Performance Counters Unit\n");

        if (upr & SPR_UPR_PMP)

                printf("Power Management Unit\n");

        if (upr & SPR_UPR_PICP)

                printf("Programmable Interrupt Controller\n");

        if (upr & SPR_UPR_TTP)

                printf("Tick Timer\n");

        if (upr & SPR_UPR_CUP)

                printf("Context units\n");

        return 0;

}

void

print_or1k_dc_config (void)

{

        unsigned long dccfgr = mfspr(SPR_DCCFGR);

        unsigned long ways, sets, bs;

        ways = (1 << (dccfgr & SPR_DCCFGR_NCW));

        sets = (1 << ((dccfgr & SPR_DCCFGR_NCS)>> SPR_DCCFGR_NCS_OFF));

        bs = ((dccfgr & SPR_DCCFGR_CBS) == SPR_DCCFGR_CBS) ? 32 : 16;

        printf("\nData Cache capabilities:\n");

        printf("Ways:\t%d\t", ways);

        printf("Sets:\t%d\t", sets);

        printf("Block size: %d\n", bs);

        printf("Total size: %d kByte\n", (ways * sets * bs) / 1024);

        printf("Write strategy:\t\t\t\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CWS) == SPR_DCCFGR_CWS) ?

               "write-back" : "write-through");

        printf("Cache control register:\t\t\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CCRI) == SPR_DCCFGR_CCRI) ?

               "implemented" : "not implemented");

        printf("Cache block invalidate capability:\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CBIRI) == SPR_DCCFGR_CBIRI) ?

               "implemented" : "not implemented");

        printf("Cache block prefetch capability:\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CBPRI) == SPR_DCCFGR_CBPRI) ?

               "implemented" : "not implemented");

        printf("Cache block lock capability:\t\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CBLRI) == SPR_DCCFGR_CBLRI) ?

               "implemented" : "not implemented");

        printf("Cache block flush capability:\t\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CBFRI) == SPR_DCCFGR_CBFRI) ?

               "implemented" : "not implemented");

        printf("Cache block write-back capability:\t\t%s\n",

               ((dccfgr & SPR_DCCFGR_CBWBRI) == SPR_DCCFGR_CBWBRI) ?

               "implemented" : "not implemented");

}

void

print_or1k_dmmu_config(void)

{

        unsigned long dmmucfgr = mfspr(SPR_DMMUCFGR);

        printf("\nDMMU Capabilities:\n");

        printf("TLB Ways:\t%d",

               (dmmucfgr & SPR_DMMUCFGR_NTW) + 1);

        printf("\tTLB Sets:\t%d",

               1 << ((dmmucfgr & SPR_DMMUCFGR_NTS)>> SPR_DMMUCFGR_NTS_OFF));

        printf("\tATB:\t");

        if (!(dmmucfgr & SPR_DMMUCFGR_NAE))

                printf("none");

        else

                printf("%d", (dmmucfgr & SPR_DMMUCFGR_NAE)>>5);

        printf("\n");

        printf("Control register:\t\t\t\t%s\n",

               ((dmmucfgr & SPR_DMMUCFGR_CRI) == SPR_DMMUCFGR_CRI) ?

               "implemented" : "not implemented");

        printf("Protection register:\t\t\t\t%s\n",

               ((dmmucfgr & SPR_DMMUCFGR_PRI) == SPR_DMMUCFGR_PRI) ?

               "implemented" : "not implemented");

        printf("Invalidate entry register:\t\t\t%s\n",

               ((dmmucfgr & SPR_DMMUCFGR_TEIRI) == SPR_DMMUCFGR_TEIRI) ?

               "implemented" : "not implemented");

        printf("TLB reload:\t\t\t\t\t%sware\n",

               ((dmmucfgr & SPR_DMMUCFGR_HTR) == SPR_DMMUCFGR_HTR) ?

               "hard" : "soft");

}

void

print_or1k_immu_config(void)

{

        unsigned long immucfgr = mfspr(SPR_IMMUCFGR);

        printf("\nIMMU Capabilities:\n");

        printf("TLB Ways:\t%d",

               (immucfgr & SPR_IMMUCFGR_NTW) + 1);

        printf("\tTLB Sets:\t%d",

               1 << ((immucfgr & SPR_IMMUCFGR_NTS)>> SPR_IMMUCFGR_NTS_OFF));

        printf("\tATB:\t");

        if (!(immucfgr & SPR_IMMUCFGR_NAE))

                printf("none");

        else

                printf("%d", (immucfgr & SPR_IMMUCFGR_NAE)>>5);

        printf("\n");

        printf("Control register:\t\t\t\t%s\n",

               ((immucfgr & SPR_IMMUCFGR_CRI) == SPR_IMMUCFGR_CRI) ?

               "implemented" : "not implemented");

        printf("Protection register:\t\t\t\t%s\n",

               ((immucfgr & SPR_IMMUCFGR_PRI) == SPR_IMMUCFGR_PRI) ?

               "implemented" : "not implemented");

        printf("Invalidate entry register:\t\t\t%s\n",

               ((immucfgr & SPR_IMMUCFGR_TEIRI) == SPR_IMMUCFGR_TEIRI) ?

               "implemented" : "not implemented");

        printf("TLB reload:\t\t\t\t\t%sware\n",

               ((immucfgr & SPR_IMMUCFGR_HTR) == SPR_IMMUCFGR_HTR) ?

               "hard" : "soft");

}

void

print_or1k_ic_config (void)

{

        unsigned long iccfgr = mfspr(SPR_ICCFGR);

        unsigned long ways, sets, bs;

        printf("\nInstruction Cache capabilities:\n");

        ways = (1 << (iccfgr & SPR_ICCFGR_NCW));

        sets = (1 << ((iccfgr & SPR_ICCFGR_NCS)>> SPR_ICCFGR_NCS_OFF));

        bs = ((iccfgr & SPR_ICCFGR_CBS) == SPR_ICCFGR_CBS) ? 32 : 16;

        printf("Ways:\t%d\t", ways);

        printf("Sets:\t%d\t", sets);

        printf("Block size: %d\n", bs);

        printf("Total size: %d kByte\n", (ways * sets * bs) / 1024);

        printf("Cache control register:\t\t\t\t%s\n",

               ((iccfgr & SPR_ICCFGR_CCRI) == SPR_ICCFGR_CCRI) ?

               "implemented" : "not implemented");

        printf("Cache block invalidate capability:\t\t%s\n",

               ((iccfgr & SPR_ICCFGR_CBIRI) == SPR_ICCFGR_CBIRI) ?

               "implemented" : "not implemented");

        printf("Cache block prefetch capability:\t\t%s\n",

               ((iccfgr & SPR_ICCFGR_CBPRI) == SPR_ICCFGR_CBPRI) ?

               "implemented" : "not implemented");

        printf("Cache block lock capability:\t\t\t%s\n",

               ((iccfgr & SPR_ICCFGR_CBLRI) == SPR_ICCFGR_CBLRI) ?

               "implemented" : "not implemented");

}

void

print_or1k_cpu_config(void)

{

        unsigned long cpucfgr = mfspr(SPR_CPUCFGR);

        printf("\nCPU Capabilities:\n");

        printf("Shadow GPR files: %d\n",(cpucfgr & SPR_CPUCFGR_NSGF));

        printf("GPR file size: %s\n",

               ((cpucfgr & SPR_CPUCFGR_CGF)==SPR_CPUCFGR_CGF) ? "<32" : "32");

        printf("ORBIS32: %ssupported\n",

               ((cpucfgr & SPR_CPUCFGR_OB32S)==SPR_CPUCFGR_OB32S) ?"":"not ");

        printf("ORBIS64: %ssupported\n",

               ((cpucfgr & SPR_CPUCFGR_OB64S)==SPR_CPUCFGR_OB64S) ?"":"not ");

        printf("ORFPX32: %ssupported\n",

               ((cpucfgr & SPR_CPUCFGR_OF32S)==SPR_CPUCFGR_OF32S) ?"":"not ");

        printf("ORFPX64: %ssupported\n",

               ((cpucfgr & SPR_CPUCFGR_OF64S)==SPR_CPUCFGR_OF64S) ?"":"not ");

        printf("ORVDX64: %ssupported\n",

               ((cpucfgr & SPR_CPUCFGR_OV64S)==SPR_CPUCFGR_OV64S) ?"":"not ");

}

void

print_or1k_version_reg(void)

{

        unsigned long vr = mfspr(SPR_VR);

        printf("\nVersion Register\n");

        printf("Version:\t0x%2x",(vr & SPR_VR_VER) >> SPR_VR_VER_OFF);

        printf("\tConfig:\t%d",(vr & SPR_VR_CFG) >> SPR_VR_CFG_OFF);

        printf("\tRevision:\t%d",(vr & SPR_VR_REV));

        printf("\n");

}

void

print_or1k_du_config(void)

{

        unsigned long dcfgr = mfspr(SPR_DCFGR);

        printf("\nDebug Unit Capabilities:\n");

        printf("Debug Pairs: %d\n",

               (dcfgr & SPR_DCFGR_NDP) + 1);

        printf("Watchpoint counters:\t\t\t\t%simplemented\n",

               ((dcfgr & SPR_DCFGR_WPCI)==SPR_DCFGR_WPCI) ?"":"not ");

}

/* Handler for illegal instructions, to indicate if the exception was tripped */

void

illegal_insn_handler(void)

{

        // Step past illegal instruction

        unsigned long epcr = mfspr(SPR_EPCR_BASE);

        epcr += 4;

        mtspr(SPR_EPCR_BASE,epcr);

        illegal_instruction = 1;

        return;

}

/* Call function we passed, return 1 if supported by hardware, 0 if not */

int

or1k_insn_hw_support_detect(void (* function)(void))

{

        /* Install illegal instruction handler */

        add_handler(7, illegal_insn_handler);

        /* Clear illegal instruction indicator */

        illegal_instruction = 0;

        /* Call function that tests hardware support of an instruction,

           potentially resulting in illegal instruction exception occurring. */

        (*function)();

        return !illegal_instruction;

}

void

or1k_test_mul (void)

{

        volatile int a, b, c;

        a = b = 12;

        asm ("l.mul %0,%1,%2" : "=r" (c) : "r" (a), "r" (b));

        return;

}

void

or1k_test_div (void)

{

        volatile int a, b, c;

        a = b = 12;

        asm ("l.div %0,%1,%2" : "=r" (c) : "r" (a), "r" (b));

        return;

}

void

or1k_test_ff1 (void)

{

        volatile int a, b;

        a = b = 12;

        asm ("l.ff1 %0,%1" : "=r" (a) : "r" (b));

        return;

}

void

or1k_test_fl1 (void)

{

        volatile int a, b;

        a = b = 12;

        asm ("l.fl1 %0,%1" : "=r" (a) : "r" (b));

        return;

}

void

or1k_test_lfrem (void)

{

        volatile int a, b, c;

        a = b = 12;

        asm ("lf.rem.s %0,%1,%2" : "=r" (c) : "r" (a), "r" (b));

        return;

}

void

print_or1k_insn_support (char* insnname,void (* function)(void))

{

        printf("\n%s instruction:\t %ssupported by hardware\n", insnname,

               or1k_insn_hw_support_detect(function) ? "" : "not ");

}

int

main (void)

{

        unsigned long upr;

        uart_init(DEFAULT_UART);

        printf("\nOR1200 capability detection\n");

        print_or1k_cpu_config();

        print_or1k_version_reg();

        /* Unit present register */

        upr = mfspr(SPR_UPR);

        if (print_or1k_upr(upr))

                /* No UPR - can't tell what's here */

                return 0;

        if (upr & SPR_UPR_DCP)

                print_or1k_dc_config();

        if (upr & SPR_UPR_ICP)

                print_or1k_ic_config();

        if (upr & SPR_UPR_DMP)

                print_or1k_dmmu_config();

        if (upr & SPR_UPR_IMP)

                print_or1k_immu_config();

        if (upr & SPR_UPR_DUP)

                print_or1k_du_config();

        /* Now test for supported instructions */

        print_or1k_insn_support("Multiply", or1k_test_mul);

        print_or1k_insn_support("Multiply", or1k_test_mul);

        print_or1k_insn_support("Divide", or1k_test_div);

        print_or1k_insn_support("Find first '1'", or1k_test_ff1);

        print_or1k_insn_support("Find last '1'", or1k_test_fl1);

        print_or1k_insn_support("Floating remainder", or1k_test_lfrem);

        printf("End of capabilities testing\n");

}