verilog/dv/user_sram_exec/user_sram_exec.c

/*
 * SPDX-FileCopyrightText: 2020 Efabless Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * SPDX-License-Identifier: Apache-2.0
 */


#define SC_SIM_OUTPORT (0xf0000000)
#include "int_reg_map.h"
#include "common_misc.h"
#include "common_bthread.h"

// -------------------------------------------------------------------------
// Test copying code into SRAM and running it from there.
// -------------------------------------------------------------------------

void test_function()
{
    reg_glbl_soft_reg_2  = 0x33445566;  // Sig-2
    reg_glbl_soft_reg_3  = 0x44556677;  // Sig-3

    return;
}

void main()
{
    uint16_t func[&main - &test_function];
    uint16_t *src_ptr;
    uint16_t *dst_ptr;

   // GLBL_CFG_MAIL_BOX used as mail box, each core update boot up handshake at 8 bit
   // bit[7:0]   - core-0
   // bit[15:8]  - core-1
   // bit[23:16] - core-2
   // bit[31:24] - core-3

   reg_glbl_mail_box = 0x1 << (bthread_get_core_id() * 8); // Start of Main 

    src_ptr = &test_function;
    dst_ptr = func;

    reg_glbl_soft_reg_0  = 0x11223344;  // Sig-0
    while (src_ptr < &main) {
	*(dst_ptr++) = *(src_ptr++);
    }

    // Call the routine in SRAM
    reg_glbl_soft_reg_1  = 0x22334455;  // Sig-1
    
    ((void(*)())func)();

    reg_glbl_soft_reg_4 = 0x55667788; // Sig-4
    reg_glbl_soft_reg_5 = 0x66778899; // Sig-5

    // Signal end of test
}