main.c

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// main.c for Cosmos+ OpenSSD
// Copyright (c) 2016 Hanyang University ENC Lab.
// Contributed by Yong Ho Song <yhsong@enc.hanyang.ac.kr>
//                Youngjin Jo <yjjo@enc.hanyang.ac.kr>
//                Sangjin Lee <sjlee@enc.hanyang.ac.kr>
//                Jaewook Kwak <jwkwak@enc.hanyang.ac.kr>
//                Kibin Park <kbpark@enc.hanyang.ac.kr>
//
// This file is part of Cosmos+ OpenSSD.
//
// Cosmos+ OpenSSD is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// Cosmos+ OpenSSD 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Cosmos+ OpenSSD; see the file COPYING.
// If not, see <http://www.gnu.org/licenses/>.
 
// Company: ENC Lab. <http://enc.hanyang.ac.kr>
// Engineer: Sangjin Lee <sjlee@enc.hanyang.ac.kr>
//           Jaewook Kwak <jwkwak@enc.hanyang.ac.kr>
//           Kibin Park <kbpark@enc.hanyang.ac.kr>
//
// Project Name: Cosmos+ OpenSSD
// Design Name: Cosmos+ Firmware
// Module Name: Main
// File Name: main.c
//
// Version: v1.0.2
//
// Description:
//   - initializes caches, MMU, exception handler
//   - calls nvme_main function
 
// Revision History:
//
// * v1.0.2
//   - An address region (0x0020_0000 ~ 0x179F_FFFF) is used to uncached & nonbuffered region
//   - An address region (0x1800_0000 ~ 0x3FFF_FFFF) is used to cached & buffered region
//
// * v1.0.1
//   - Paging table setting is modified for QSPI or SD card boot mode
//     * An address region (0x0010_0000 ~ 0x001F_FFFF) is used to place code, data, heap and stack sections
//     * An address region (0x0010_0000 ~ 0x001F_FFFF) is setted a cached&bufferd region
//
// * v1.0.0
//   - First draft
 
#include "xil_cache.h"
#include "xil_exception.h"
#include "xil_mmu.h"
#include "xparameters_ps.h"
#include "xscugic_hw.h"
#include "xscugic.h"
#include "xil_printf.h"
#include "debug.h"
 
#include "nvme/nvme.h"
#include "nvme/nvme_main.h"
#include "nvme/host_lld.h"
 
XScuGic GicInstance;
 
int main()
{
    unsigned int u;
 
    XScuGic_Config *IntcConfig;
 
    Xil_ICacheDisable();
    Xil_DCacheDisable();
    Xil_DisableMMU();
 
// Paging table set
#define MB (1024 * 1024)
    for (u = 0; u < 4096; u++)
    {
        if (u < 0x2)
            Xil_SetTlbAttributes(u * MB, 0xC1E); // cached & buffered
        else if (u < 0x180)
            Xil_SetTlbAttributes(u * MB, 0xC12); // uncached & nonbuffered
        else if (u < 0x400)
            Xil_SetTlbAttributes(u * MB, 0xC1E); // cached & buffered
        else
            Xil_SetTlbAttributes(u * MB, 0xC12); // uncached & nonbuffered
    }
 
    Xil_EnableMMU();
    Xil_ICacheEnable();
    Xil_DCacheEnable();
    xil_printf("[!] MMU has been enabled.\r\n");
 
    xil_printf("\r\n Hello COSMOS+ OpenSSD !!! \r\n");
 
    Xil_ExceptionInit();
 
    IntcConfig = XScuGic_LookupConfig(XPAR_SCUGIC_SINGLE_DEVICE_ID);
    XScuGic_CfgInitialize(&GicInstance, IntcConfig, IntcConfig->CpuBaseAddress);
    Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT, (Xil_ExceptionHandler)XScuGic_InterruptHandler,
                                 &GicInstance);
 
    XScuGic_Connect(&GicInstance, 61, (Xil_ExceptionHandler)dev_irq_handler, (void *)0);
 
    XScuGic_Enable(&GicInstance, 61);
 
    // Enable interrupts in the Processor.
    Xil_ExceptionEnableMask(XIL_EXCEPTION_IRQ);
    Xil_ExceptionEnable();
 
    dev_irq_init();
 
    nvme_main();
 
    xil_printf("done\r\n");
 
    return 0;
}