FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar531x/ar5315_machdep.c

     /*-
      * Copyright (c) 2016, Hiroki Mori
      * Copyright (c) 2009 Oleksandr Tymoshenko
      * 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 <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/12.0/sys/mips/atheros/ar531x/ar5315_machdep.c 336245 2018-07-13 16:43:17Z imp $");
    
    #include "opt_ddb.h"
    #include "opt_ar531x.h"
    
    #include <sys/param.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/cons.h>
    #include <sys/kdb.h>
    #include <sys/reboot.h>
    #include <sys/boot.h>
    
    #include <vm/vm.h>
    #include <vm/vm_page.h>
    
    #include <net/ethernet.h>
    
    #include <machine/clock.h>
    #include <machine/cpu.h>
    #include <machine/cpuregs.h>
    #include <machine/hwfunc.h>
    #include <machine/md_var.h>
    #include <machine/trap.h>
    #include <machine/vmparam.h>
    
    #include <mips/atheros/ar531x/ar5315reg.h>
    
    #include <mips/atheros/ar531x/ar5315_setup.h>
    #include <mips/atheros/ar531x/ar5315_cpudef.h>
    
    extern char edata[], end[];
    
    uint32_t ar711_base_mac[ETHER_ADDR_LEN];
    /* 4KB static data aread to keep a copy of the bootload env until
       the dynamic kenv is setup */
    char boot1_env[4096];
    
    void
    platform_cpu_init()
    {
            /* Nothing special */
    }
    
    void
    platform_reset(void)
    {
            ar531x_device_reset();
            /* Wait for reset */
            while(1)
                    ;
    }
    
    /*
     * Obtain the MAC address via the Redboot environment.
     */
    static void
    ar5315_redboot_get_macaddr(void)
    {
            char *var;
            int count = 0;
    
            /*
             * "ethaddr" is passed via envp on RedBoot platforms
             * "kmac" is passed via argv on RouterBOOT platforms
             */
            if ((var = kern_getenv("ethaddr")) != NULL ||
                (var = kern_getenv("kmac")) != NULL) {
                    count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
                       &ar711_base_mac[0], &ar711_base_mac[1],
                       &ar711_base_mac[2], &ar711_base_mac[3],
                       &ar711_base_mac[4], &ar711_base_mac[5]);
                   if (count < 6)
                           memset(ar711_base_mac, 0,
                               sizeof(ar711_base_mac));
                   freeenv(var);
           }
   }
   
   #if defined(SOC_VENDOR) || defined(SOC_MODEL) || defined(SOC_REV)
   static SYSCTL_NODE(_hw, OID_AUTO, soc, CTLFLAG_RD, 0,
       "System on Chip information");
   #endif
   #if defined(SOC_VENDOR)
   static char hw_soc_vendor[] = SOC_VENDOR;
   SYSCTL_STRING(_hw_soc, OID_AUTO, vendor, CTLFLAG_RD, hw_soc_vendor, 0,
              "SoC vendor");
   #endif
   #if defined(SOC_MODEL)
   static char hw_soc_model[] = SOC_MODEL;
   SYSCTL_STRING(_hw_soc, OID_AUTO, model, CTLFLAG_RD, hw_soc_model, 0,
              "SoC model");
   #endif
   #if defined(SOC_REV)
   static char hw_soc_revision[] = SOC_REV;
   SYSCTL_STRING(_hw_soc, OID_AUTO, revision, CTLFLAG_RD, hw_soc_revision, 0,
              "SoC revision");
   #endif
   
   #if defined(DEVICE_VENDOR) || defined(DEVICE_MODEL) || defined(DEVICE_REV)
   static SYSCTL_NODE(_hw, OID_AUTO, device, CTLFLAG_RD, 0, "Board information");
   #endif
   #if defined(DEVICE_VENDOR)
   static char hw_device_vendor[] = DEVICE_VENDOR;
   SYSCTL_STRING(_hw_device, OID_AUTO, vendor, CTLFLAG_RD, hw_device_vendor, 0,
              "Board vendor");
   #endif
   #if defined(DEVICE_MODEL)
   static char hw_device_model[] = DEVICE_MODEL;
   SYSCTL_STRING(_hw_device, OID_AUTO, model, CTLFLAG_RD, hw_device_model, 0,
              "Board model");
   #endif
   #if defined(DEVICE_REV)
   static char hw_device_revision[] = DEVICE_REV;
   SYSCTL_STRING(_hw_device, OID_AUTO, revision, CTLFLAG_RD, hw_device_revision, 0,
              "Board revision");
   #endif
   
   void
   platform_start(__register_t a0 __unused, __register_t a1 __unused, 
       __register_t a2 __unused, __register_t a3 __unused)
   {
           uint64_t platform_counter_freq;
           int argc = 0, i;
           char **argv = NULL;
   #ifndef AR531X_ENV_UBOOT
           char **envp = NULL;
   #endif
           vm_offset_t kernend;
   
           /* 
            * clear the BSS and SBSS segments, this should be first call in
            * the function
            */
           kernend = (vm_offset_t)&end;
           memset(&edata, 0, kernend - (vm_offset_t)(&edata));
   
           mips_postboot_fixup();
   
           /* Initialize pcpu stuff */
           mips_pcpu0_init();
   
           /*
            * Until some more sensible abstractions for uboot/redboot
            * environment handling, we have to make this a compile-time
            * hack.  The existing code handles the uboot environment
            * very incorrectly so we should just ignore initialising
            * the relevant pointers.
            */
   #ifndef AR531X_ENV_UBOOT
           argc = a0;
           argv = (char**)a1;
           envp = (char**)a2;
   #endif
           /* 
            * Protect ourselves from garbage in registers 
            */
           if (MIPS_IS_VALID_PTR(envp)) {
                   for (i = 0; envp[i]; i += 2) {
                           if (strcmp(envp[i], "memsize") == 0)
                                   realmem = btoc(strtoul(envp[i+1], NULL, 16));
                   }
           }
   
           ar5315_detect_sys_type();
   
   // RedBoot SDRAM Detect is missing
   //      ar531x_detect_mem_size();
   
           /*
            * Just wild guess. RedBoot let us down and didn't reported 
            * memory size
            */
           if (realmem == 0)
                   realmem = btoc(16*1024*1024);
   
           /*
            * Allow build-time override in case Redboot lies
            * or in other situations (eg where there's u-boot)
            * where there isn't (yet) a convienent method of
            * being told how much RAM is available.
            *
            * This happens on at least the Ubiquiti LS-SR71A
            * board, where redboot says there's 16mb of RAM
            * but in fact there's 32mb.
            */
   #if     defined(AR531X_REALMEM)
                   realmem = btoc(AR531X_REALMEM);
   #endif
   
           /* phys_avail regions are in bytes */
           phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
           phys_avail[1] = ctob(realmem);
   
           dump_avail[0] = phys_avail[0];
           dump_avail[1] = phys_avail[1] - phys_avail[0];
   
           physmem = realmem;
   
           /*
            * ns8250 uart code uses DELAY so ticker should be inititalized 
            * before cninit. And tick_init_params refers to hz, so * init_param1 
            * should be called first.
            */
           init_param1();
           boothowto |= (RB_SERIAL | RB_MULTIPLE); /* Use multiple consoles */
   //      boothowto |= RB_VERBOSE;
   //      boothowto |= (RB_SINGLE);
   
           /* Detect the system type - this is needed for subsequent chipset-specific calls */
   
   
           ar531x_device_soc_init();
           ar531x_detect_sys_frequency();
   
           platform_counter_freq = ar531x_cpu_freq();
           mips_timer_init_params(platform_counter_freq, 1);
           cninit();
           init_static_kenv(boot1_env, sizeof(boot1_env));
   
           printf("CPU platform: %s\n", ar5315_get_system_type());
           printf("CPU Frequency=%d MHz\n", ar531x_cpu_freq() / 1000000);
           printf("CPU DDR Frequency=%d MHz\n", ar531x_ddr_freq() / 1000000);
           printf("CPU AHB Frequency=%d MHz\n", ar531x_ahb_freq() / 1000000); 
   
           printf("platform frequency: %lld\n", platform_counter_freq);
           printf("arguments: \n");
           printf("  a0 = %08x\n", a0);
           printf("  a1 = %08x\n", a1);
           printf("  a2 = %08x\n", a2);
           printf("  a3 = %08x\n", a3);
   
           /*
            * XXX this code is very redboot specific.
            */
           printf("Cmd line:");
           if (MIPS_IS_VALID_PTR(argv)) {
                   for (i = 0; i < argc; i++) {
                           printf(" %s", argv[i]);
                           boothowto |= boot_parse_arg(argv[i]);
                   }
           }
           else
                   printf ("argv is invalid");
           printf("\n");
   
           printf("Environment:\n");
   #if 0
           if (MIPS_IS_VALID_PTR(envp)) {
                   if (envp[0] && strchr(envp[0], '=') ) {
                           char *env_val; //
                           for (i = 0; envp[i]; i++) {
                                   env_val = strchr(envp[i], '=');
                                   /* Not sure if we correct to change data, but env in RAM */
                                   *(env_val++) = '\0';
                                   printf("=  %s = %s\n", envp[i], env_val);
                                   kern_setenv(envp[i], env_val);
                           }
                   } else {
                           for (i = 0; envp[i]; i+=2) {
                                   printf("  %s = %s\n", envp[i], envp[i+1]);
                                   kern_setenv(envp[i], envp[i+1]);
                           }
                   }
           }
           else 
                   printf ("envp is invalid\n");
   #else
           printf ("envp skiped\n");
   #endif
   
           /* Redboot if_are MAC address is in the environment */
           ar5315_redboot_get_macaddr();
   
           init_param2(physmem);
           mips_cpu_init();
           pmap_bootstrap();
           mips_proc0_init();
           mutex_init();
   
           ar531x_device_start();
   
           kdb_init();
   #ifdef KDB
           if (boothowto & RB_KDB)
                   kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
   #endif
   
   }

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