FreeBSD/Linux Kernel Cross Reference
sys/arm/nvidia/tegra124/tegra124_machdep.c

     /*-
      * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include "opt_platform.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/devmap.h>
    #include <sys/lock.h>
    #include <sys/reboot.h>
    #include <sys/systm.h>
    
    #include <vm/vm.h>
    
    #include <machine/bus.h>
    #include <machine/fdt.h>
    #include <machine/intr.h>
    #include <machine/machdep.h>
    #include <machine/platformvar.h>
    
    #include <dev/ofw/openfirm.h>
    
    #include <arm/nvidia/tegra124/tegra124_mp.h>
    
    #include "platform_if.h"
    
    #define PMC_PHYSBASE            0x7000e400
    #define PMC_SIZE                0x400
    #define PMC_CONTROL_REG         0x0
    #define PMC_SCRATCH0            0x50
    #define  PMC_SCRATCH0_MODE_RECOVERY     (1 << 31)
    #define  PMC_SCRATCH0_MODE_BOOTLOADER   (1 << 30)
    #define  PMC_SCRATCH0_MODE_RCM          (1 << 1)
    #define  PMC_SCRATCH0_MODE_MASK         (PMC_SCRATCH0_MODE_RECOVERY | \
                                            PMC_SCRATCH0_MODE_BOOTLOADER | \
                                            PMC_SCRATCH0_MODE_RCM)
    
    static platform_attach_t tegra124_attach;
    static platform_devmap_init_t tegra124_devmap_init;
    static platform_late_init_t tegra124_late_init;
    static platform_cpu_reset_t tegra124_cpu_reset;
    
    static int
    tegra124_attach(platform_t plat)
    {
    
            return (0);
    }
    
    static void
    tegra124_late_init(platform_t plat)
    {
    
    }
    
    /*
     * Set up static device mappings.
     *
     */
    static int
    tegra124_devmap_init(platform_t plat)
    {
    
            devmap_add_entry(0x70000000, 0x01000000);
            return (0);
    }
    
    static void
    tegra124_cpu_reset(platform_t plat)
    {
            bus_space_handle_t pmc;
            uint32_t reg;
    
           printf("Resetting...\n");
           bus_space_map(fdtbus_bs_tag, PMC_PHYSBASE, PMC_SIZE, 0, &pmc);
   
           reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0);
           reg &= PMC_SCRATCH0_MODE_MASK;
           bus_space_write_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0,
              reg | PMC_SCRATCH0_MODE_BOOTLOADER);         /* boot to bootloader */
           bus_space_read_4(fdtbus_bs_tag, pmc, PMC_SCRATCH0);
   
           reg = bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG);
           spinlock_enter();
           dsb();
           bus_space_write_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG, reg | 0x10);
           bus_space_read_4(fdtbus_bs_tag, pmc, PMC_CONTROL_REG);
           while(1)
                   ;
   
   }
   
   /*
    * Early putc routine for EARLY_PRINTF support.  To use, add to kernel config:
    *   option SOCDEV_PA=0x70000000
    *   option SOCDEV_VA=0x70000000
    *   option EARLY_PRINTF
    */
   #if 0
   #ifdef EARLY_PRINTF
   static void
   tegra124_early_putc(int c)
   {
   
           volatile uint32_t * UART_STAT_REG = (uint32_t *)(0x70006314);
           volatile uint32_t * UART_TX_REG   = (uint32_t *)(0x70006300);
           const uint32_t      UART_TXRDY    = (1 << 6);
           while ((*UART_STAT_REG & UART_TXRDY) == 0)
                   continue;
           *UART_TX_REG = c;
   }
   early_putc_t *early_putc = tegra124_early_putc;
   #endif
   #endif
   
   static platform_method_t tegra124_methods[] = {
           PLATFORMMETHOD(platform_attach,         tegra124_attach),
           PLATFORMMETHOD(platform_devmap_init,    tegra124_devmap_init),
           PLATFORMMETHOD(platform_late_init,      tegra124_late_init),
           PLATFORMMETHOD(platform_cpu_reset,      tegra124_cpu_reset),
   
   #ifdef SMP
           PLATFORMMETHOD(platform_mp_start_ap,    tegra124_mp_start_ap),
           PLATFORMMETHOD(platform_mp_setmaxid,    tegra124_mp_setmaxid),
   #endif
           PLATFORMMETHOD_END,
   };
   
   FDT_PLATFORM_DEF(tegra124, "Nvidia Jetson-TK1", 0, "nvidia,jetson-tk1", 120);

Cache object: 7db8d9881b2fcd45bb886552b1a1954e