ar71xx_machdep.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2009 Oleksandr Tymoshenko
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include "opt_ddb.h"
   33 #include "opt_ar71xx.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/conf.h>
   37 #include <sys/kernel.h>
   38 #include <sys/systm.h>
   39 #include <sys/bus.h>
   40 #include <sys/cons.h>
   41 #include <sys/kdb.h>
   42 #include <sys/lock.h>
   43 #include <sys/mutex.h>
   44 #include <sys/boot.h>
   45 #include <sys/reboot.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/vm_param.h>
   49 #include <vm/vm_page.h>
   50 #include <vm/vm_phys.h>
   51 #include <vm/vm_dumpset.h>
   52 
   53 #include <net/ethernet.h>
   54 
   55 #include <machine/clock.h>
   56 #include <machine/cpu.h>
   57 #include <machine/cpuregs.h>
   58 #include <machine/hwfunc.h>
   59 #include <machine/md_var.h>
   60 #include <machine/trap.h>
   61 
   62 #include <mips/atheros/ar71xxreg.h>
   63 
   64 #include <mips/atheros/ar71xx_setup.h>
   65 #include <mips/atheros/ar71xx_cpudef.h>
   66 #include <mips/atheros/ar71xx_macaddr.h>
   67 
   68 extern char edata[], end[];
   69 
   70 /* 4KB static data aread to keep a copy of the bootload env until
   71    the dynamic kenv is setup */
   72 char boot1_env[4096];
   73 
   74 void
   75 platform_cpu_init()
   76 {
   77         /* Nothing special */
   78 }
   79 
   80 void
   81 platform_reset(void)
   82 {
   83         ar71xx_device_stop(RST_RESET_FULL_CHIP);
   84         /* Wait for reset */
   85         while(1)
   86                 ;
   87 }
   88 
   89 /*
   90  * Obtain the MAC address via the Redboot environment.
   91  */
   92 static int
   93 ar71xx_redboot_get_macaddr(void)
   94 {
   95         char *var;
   96         int count = 0, i;
   97         uint32_t macaddr[ETHER_ADDR_LEN];
   98         uint8_t tmpmac[ETHER_ADDR_LEN];
   99 
  100         /*
  101          * "ethaddr" is passed via envp on RedBoot platforms
  102          * "kmac" is passed via argv on RouterBOOT platforms
  103          */
  104         if ((var = kern_getenv("ethaddr")) != NULL ||
  105             (var = kern_getenv("kmac")) != NULL) {
  106                 count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
  107                     &macaddr[0], &macaddr[1],
  108                     &macaddr[2], &macaddr[3],
  109                     &macaddr[4], &macaddr[5]);
  110 
  111                 if (count < 6) {
  112                         memset(macaddr, 0,
  113                             sizeof(macaddr));
  114                 } else {
  115                         for (i = 0; i < ETHER_ADDR_LEN; i++)
  116                                 tmpmac[i] = macaddr[i] & 0xff;
  117                         (void) ar71xx_mac_addr_init(ar71xx_board_mac_addr,
  118                             tmpmac,
  119                             0, /* offset */
  120                             0); /* is_local */
  121                 }
  122                 freeenv(var);
  123                 return (0);
  124         }
  125         return (-1);
  126 }
  127 
  128 #ifdef  AR71XX_ENV_ROUTERBOOT
  129 /*
  130  * RouterBoot gives us the board memory in a command line argument.
  131  */
  132 static int
  133 ar71xx_routerboot_get_mem(int argc, char **argv)
  134 {
  135         int i, board_mem;
  136 
  137         /*
  138          * Protect ourselves from garbage in registers.
  139          */
  140         if (!MIPS_IS_VALID_PTR(argv))
  141                 return (0);
  142 
  143         for (i = 0; i < argc; i++) {
  144                 if (argv[i] == NULL)
  145                         continue;
  146                 if (strncmp(argv[i], "mem=", 4) == 0) {
  147                         if (sscanf(argv[i] + 4, "%dM", &board_mem) == 1)
  148                                 return (btoc(board_mem * 1024 * 1024));
  149                 }
  150         }
  151 
  152         return (0);
  153 }
  154 #endif
  155 
  156 /*
  157  * Handle initialising the MAC address from a specific EEPROM
  158  * offset.
  159  *
  160  * This is done during (very) early boot.
  161  *
  162  * hint.ar71xx.0.eeprom_mac_addr=<address to read from>
  163  * hint.ar71xx.0.eeprom_mac_isascii=<0|1>
  164  */
  165 static int
  166 ar71xx_platform_read_eeprom_mac(void)
  167 {
  168         long eeprom_mac_addr = 0;
  169         const char *mac;
  170         int i, readascii = 0;
  171         uint8_t macaddr[ETHER_ADDR_LEN];
  172 
  173         if (resource_long_value("ar71xx", 0, "eeprom_mac_addr",
  174             &eeprom_mac_addr) != 0)
  175                 return (-1);
  176 
  177         /* get a pointer to the EEPROM MAC address */
  178 
  179         mac = (const char *) MIPS_PHYS_TO_KSEG1(eeprom_mac_addr);
  180 
  181         /* Check if it's ASCII or not */
  182         if (resource_int_value("ar71xx", 0, "eeprom_mac_isascii",
  183             &readascii) == 0 && readascii == 1) {
  184                 printf("ar71xx: Overriding MAC from EEPROM (ascii)\n");
  185                 for (i = 0; i < 6; i++) {
  186                         macaddr[i] = strtol(&(mac[i*3]), NULL, 16);
  187                 }
  188         } else {
  189                 printf("ar71xx: Overriding MAC from EEPROM\n");
  190                 for (i = 0; i < 6; i++) {
  191                         macaddr[i] = mac[i];
  192                 }
  193         }
  194 
  195         /* Set the default board MAC */
  196         (void) ar71xx_mac_addr_init(ar71xx_board_mac_addr,
  197             macaddr,
  198             0, /* offset */
  199             0); /* is_local */
  200         printf("ar71xx: Board MAC: %6D\n", ar71xx_board_mac_addr, ":");
  201         return (0);
  202 }
  203 
  204 /*
  205  * Populate a kenv hint for the given device based on the given
  206  * MAC address and offset.
  207  *
  208  * Returns 0 if ok, < 0 on error.
  209  */
  210 static int
  211 ar71xx_platform_set_mac_hint(const char *dev, int unit,
  212     const uint8_t *macaddr, int offset, int islocal)
  213 {
  214         char macstr[32];
  215         uint8_t lclmac[ETHER_ADDR_LEN];
  216         char devstr[32];
  217 
  218         /* Initialise the MAC address, plus/minus the offset */
  219         if (ar71xx_mac_addr_init(lclmac, macaddr, offset, islocal) != 0) {
  220                 return (-1);
  221         }
  222 
  223         /* Turn it into a string */
  224         snprintf(macstr, 32, "%6D", lclmac, ":");
  225         snprintf(devstr, 32, "hint.%s.%d.macaddr", dev, unit);
  226 
  227         printf("  %s => %s\n", devstr, macstr);
  228 
  229         /* Call setenv */
  230         if (kern_setenv(devstr, macstr) != 0) {
  231                 printf("%s: failed to set hint (%s => %s)\n",
  232                     __func__,
  233                     devstr,
  234                     macstr);
  235                 return (-1);
  236         }
  237 
  238         return (0);
  239 }
  240 
  241 /*
  242  * Iterate through the list of boot time hints that populate
  243  * a device MAC address hint based on the "board" MAC address.
  244  *
  245  * ar71xx_mac_map.X.devid=<device id, eg ath>
  246  * ar71xx_mac_map.X.unitid=<unit id, eg 0>
  247  * ar71xx_mac_map.X.offset=<mac address value offset>
  248  * ar71xx_mac_map.X.is_local=<1 or 0>
  249  */
  250 static int
  251 ar71xx_platform_check_mac_hints(void)
  252 {
  253         int i;
  254         const char *devid;
  255         int offset, is_local, unitid;
  256 
  257         for (i = 0; i < 8; i++) {
  258                 if (resource_string_value("ar71xx_mac_map", i, "devid",
  259                     &devid) != 0)
  260                         break;
  261                 if (resource_int_value("ar71xx_mac_map", i, "unitid",
  262                     &unitid) != 0)
  263                         break;
  264                 if (resource_int_value("ar71xx_mac_map", i, "offset",
  265                     &offset) != 0)
  266                         break;
  267                 if (resource_int_value("ar71xx_mac_map", i, "is_local",
  268                     &is_local) != 0)
  269                         break;
  270                 printf("ar71xx: devid '%s.%d', MAC offset '%d'\n",
  271                     devid, unitid, offset);
  272                 (void) ar71xx_platform_set_mac_hint(devid, unitid,
  273                     ar71xx_board_mac_addr, offset, is_local);
  274         }
  275 
  276         return (0);
  277 }
  278 
  279 void
  280 platform_start(__register_t a0 __unused, __register_t a1 __unused, 
  281     __register_t a2 __unused, __register_t a3 __unused)
  282 {
  283         uint64_t platform_counter_freq;
  284         int argc = 0, i;
  285         char **argv = NULL, **envp = NULL;
  286         vm_offset_t kernend;
  287 
  288         /* 
  289          * clear the BSS and SBSS segments, this should be first call in
  290          * the function
  291          */
  292         kernend = (vm_offset_t)&end;
  293         memset(&edata, 0, kernend - (vm_offset_t)(&edata));
  294 
  295         mips_postboot_fixup();
  296 
  297         /* Initialize pcpu stuff */
  298         mips_pcpu0_init();
  299 
  300         /*
  301          * Until some more sensible abstractions for uboot/redboot
  302          * environment handling, we have to make this a compile-time
  303          * hack.  The existing code handles the uboot environment
  304          * very incorrectly so we should just ignore initialising
  305          * the relevant pointers.
  306          */
  307 #ifndef AR71XX_ENV_UBOOT
  308         argc = a0;
  309         argv = (char**)a1;
  310         envp = (char**)a2;
  311 #endif
  312         /* 
  313          * Protect ourselves from garbage in registers 
  314          */
  315         if (MIPS_IS_VALID_PTR(envp)) {
  316                 for (i = 0; envp[i]; i += 2) {
  317                         if (strcmp(envp[i], "memsize") == 0)
  318                                 realmem = btoc(strtoul(envp[i+1], NULL, 16));
  319                         else if (strcmp(envp[i], "bootverbose") == 0)
  320                                 bootverbose = btoc(strtoul(envp[i+1], NULL, 10));
  321                 }
  322         }
  323         bootverbose = 1;
  324 
  325 #ifdef  AR71XX_ENV_ROUTERBOOT
  326         /*
  327          * RouterBoot informs the board memory as a command line argument.
  328          */
  329         if (realmem == 0)
  330                 realmem = ar71xx_routerboot_get_mem(argc, argv);
  331 #endif
  332 
  333         /*
  334          * Just wild guess. RedBoot let us down and didn't reported 
  335          * memory size
  336          */
  337         if (realmem == 0)
  338                 realmem = btoc(32*1024*1024);
  339 
  340         /*
  341          * Allow build-time override in case Redboot lies
  342          * or in other situations (eg where there's u-boot)
  343          * where there isn't (yet) a convienent method of
  344          * being told how much RAM is available.
  345          *
  346          * This happens on at least the Ubiquiti LS-SR71A
  347          * board, where redboot says there's 16mb of RAM
  348          * but in fact there's 32mb.
  349          */
  350 #if     defined(AR71XX_REALMEM)
  351                 realmem = btoc(AR71XX_REALMEM);
  352 #endif
  353 
  354         /* phys_avail regions are in bytes */
  355         phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
  356         phys_avail[1] = ctob(realmem);
  357 
  358         dump_avail[0] = 0;
  359         dump_avail[1] = phys_avail[1];
  360 
  361         physmem = realmem;
  362 
  363         /*
  364          * ns8250 uart code uses DELAY so ticker should be inititalized 
  365          * before cninit. And tick_init_params refers to hz, so * init_param1 
  366          * should be called first.
  367          */
  368         init_param1();
  369 
  370         /* Detect the system type - this is needed for subsequent chipset-specific calls */
  371         ar71xx_detect_sys_type();
  372         ar71xx_detect_sys_frequency();
  373 
  374         platform_counter_freq = ar71xx_cpu_freq();
  375         mips_timer_init_params(platform_counter_freq, 1);
  376         cninit();
  377         init_static_kenv(boot1_env, sizeof(boot1_env));
  378 
  379         printf("CPU platform: %s\n", ar71xx_get_system_type());
  380         printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
  381         printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
  382         printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
  383         printf("platform frequency: %lld MHz\n", platform_counter_freq / 1000000);
  384         printf("CPU reference clock: %d MHz\n", u_ar71xx_refclk / 1000000);
  385         printf("CPU MDIO clock: %d MHz\n", u_ar71xx_mdio_freq / 1000000);
  386         printf("arguments: \n");
  387         printf("  a0 = %08x\n", a0);
  388         printf("  a1 = %08x\n", a1);
  389         printf("  a2 = %08x\n", a2);
  390         printf("  a3 = %08x\n", a3);
  391 
  392         strcpy(cpu_model, ar71xx_get_system_type());
  393 
  394         /*
  395          * XXX this code is very redboot specific.
  396          */
  397         printf("Cmd line:");
  398         if (MIPS_IS_VALID_PTR(argv)) {
  399                 for (i = 0; i < argc; i++) {
  400                         printf(" %s", argv[i]);
  401                         boothowto |= boot_parse_arg(argv[i]);
  402                 }
  403         }
  404         else
  405                 printf ("argv is invalid");
  406         printf("\n");
  407 
  408         printf("Environment:\n");
  409         if (MIPS_IS_VALID_PTR(envp)) {
  410                 for (i = 0; envp[i]; i+=2) {
  411                         printf("  %s = %s\n", envp[i], envp[i+1]);
  412                         kern_setenv(envp[i], envp[i+1]);
  413                 }
  414         }
  415         else 
  416                 printf ("envp is invalid\n");
  417 
  418         /* Platform setup */
  419         init_param2(physmem);
  420         mips_cpu_init();
  421         pmap_bootstrap();
  422         mips_proc0_init();
  423         mutex_init();
  424 
  425         /*
  426          * Reset USB devices 
  427          */
  428         ar71xx_init_usb_peripheral();
  429 
  430         /*
  431          * Reset internal ethernet switch, if one exists
  432          */
  433         ar71xx_reset_ethernet_switch();
  434 
  435         /*
  436          * Initialise the gmac driver.
  437          */
  438         ar71xx_init_gmac();
  439 
  440         /* Redboot if_arge MAC address is in the environment */
  441         (void) ar71xx_redboot_get_macaddr();
  442 
  443         /* Various other boards need things to come out of EEPROM */
  444         (void) ar71xx_platform_read_eeprom_mac();
  445 
  446         /* Initialise the MAC address hint map */
  447         ar71xx_platform_check_mac_hints();
  448 
  449         kdb_init();
  450 #ifdef KDB
  451         if (boothowto & RB_KDB)
  452                 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
  453 #endif
  454 }
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FreeBSD/Linux Kernel Cross Reference sys/mips/atheros/ar71xx_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_machdep.c
