ar71xx_machdep.c

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    1 /*-
    2  * Copyright (c) 2009 Oleksandr Tymoshenko
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/11.2/sys/mips/atheros/ar71xx_machdep.c 331722 2018-03-29 02:50:57Z eadler $");
   29 
   30 #include "opt_ddb.h"
   31 #include "opt_ar71xx.h"
   32 
   33 #include <sys/param.h>
   34 #include <sys/conf.h>
   35 #include <sys/kernel.h>
   36 #include <sys/systm.h>
   37 #include <sys/bus.h>
   38 #include <sys/cons.h>
   39 #include <sys/kdb.h>
   40 #include <sys/reboot.h>
   41 
   42 #include <vm/vm.h>
   43 #include <vm/vm_page.h>
   44 
   45 #include <net/ethernet.h>
   46 
   47 #include <machine/clock.h>
   48 #include <machine/cpu.h>
   49 #include <machine/cpuregs.h>
   50 #include <machine/hwfunc.h>
   51 #include <machine/md_var.h>
   52 #include <machine/trap.h>
   53 #include <machine/vmparam.h>
   54 
   55 #include <mips/atheros/ar71xxreg.h>
   56 
   57 #include <mips/atheros/ar71xx_setup.h>
   58 #include <mips/atheros/ar71xx_cpudef.h>
   59 #include <mips/atheros/ar71xx_macaddr.h>
   60 
   61 extern char edata[], end[];
   62 
   63 /* 4KB static data aread to keep a copy of the bootload env until
   64    the dynamic kenv is setup */
   65 char boot1_env[4096];
   66 
   67 /*
   68  * We get a string in from Redboot with the all the arguments together,
   69  * "foo=bar bar=baz". Split them up and save in kenv.
   70  */
   71 static void
   72 parse_argv(char *str)
   73 {
   74         char *n, *v;
   75 
   76         while ((v = strsep(&str, " ")) != NULL) {
   77                 if (*v == '\0')
   78                         continue;
   79                 if (*v == '-') {
   80                         while (*v != '\0') {
   81                                 v++;
   82                                 switch (*v) {
   83                                 case 'a': boothowto |= RB_ASKNAME; break;
   84                                 case 'd': boothowto |= RB_KDB; break;
   85                                 case 'g': boothowto |= RB_GDB; break;
   86                                 case 's': boothowto |= RB_SINGLE; break;
   87                                 case 'v': boothowto |= RB_VERBOSE; break;
   88                                 }
   89                         }
   90                 } else {
   91                         n = strsep(&v, "=");
   92                         if (v == NULL)
   93                                 kern_setenv(n, "1");
   94                         else
   95                                 kern_setenv(n, v);
   96                 }
   97         }
   98 }
   99 
  100 void
  101 platform_cpu_init()
  102 {
  103         /* Nothing special */
  104 }
  105 
  106 void
  107 platform_reset(void)
  108 {
  109         ar71xx_device_stop(RST_RESET_FULL_CHIP);
  110         /* Wait for reset */
  111         while(1)
  112                 ;
  113 }
  114 
  115 /*
  116  * Obtain the MAC address via the Redboot environment.
  117  */
  118 static int
  119 ar71xx_redboot_get_macaddr(void)
  120 {
  121         char *var;
  122         int count = 0, i;
  123         uint32_t macaddr[ETHER_ADDR_LEN];
  124         uint8_t tmpmac[ETHER_ADDR_LEN];
  125 
  126         /*
  127          * "ethaddr" is passed via envp on RedBoot platforms
  128          * "kmac" is passed via argv on RouterBOOT platforms
  129          */
  130         if ((var = kern_getenv("ethaddr")) != NULL ||
  131             (var = kern_getenv("kmac")) != NULL) {
  132                 count = sscanf(var, "%x%*c%x%*c%x%*c%x%*c%x%*c%x",
  133                     &macaddr[0], &macaddr[1],
  134                     &macaddr[2], &macaddr[3],
  135                     &macaddr[4], &macaddr[5]);
  136 
  137                 if (count < 6) {
  138                         memset(macaddr, 0,
  139                             sizeof(macaddr));
  140                 } else {
  141                         for (i = 0; i < ETHER_ADDR_LEN; i++)
  142                                 tmpmac[i] = macaddr[i] & 0xff;
  143                         (void) ar71xx_mac_addr_init(ar71xx_board_mac_addr,
  144                             tmpmac,
  145                             0, /* offset */
  146                             0); /* is_local */
  147                 }
  148                 freeenv(var);
  149                 return (0);
  150         }
  151         return (-1);
  152 }
  153 
  154 #ifdef  AR71XX_ENV_ROUTERBOOT
  155 /*
  156  * RouterBoot gives us the board memory in a command line argument.
  157  */
  158 static int
  159 ar71xx_routerboot_get_mem(int argc, char **argv)
  160 {
  161         int i, board_mem;
  162 
  163         /*
  164          * Protect ourselves from garbage in registers.
  165          */
  166         if (!MIPS_IS_VALID_PTR(argv))
  167                 return (0);
  168 
  169         for (i = 0; i < argc; i++) {
  170                 if (argv[i] == NULL)
  171                         continue;
  172                 if (strncmp(argv[i], "mem=", 4) == 0) {
  173                         if (sscanf(argv[i] + 4, "%dM", &board_mem) == 1)
  174                                 return (btoc(board_mem * 1024 * 1024));
  175                 }
  176         }
  177 
  178         return (0);
  179 }
  180 #endif
  181 
  182 /*
  183  * Handle initialising the MAC address from a specific EEPROM
  184  * offset.
  185  *
  186  * This is done during (very) early boot.
  187  *
  188  * hint.ar71xx.0.eeprom_mac_addr=<address to read from>
  189  * hint.ar71xx.0.eeprom_mac_isascii=<0|1>
  190  */
  191 static int
  192 ar71xx_platform_read_eeprom_mac(void)
  193 {
  194         long eeprom_mac_addr = 0;
  195         const char *mac;
  196         int i, readascii = 0;
  197         uint8_t macaddr[ETHER_ADDR_LEN];
  198 
  199         if (resource_long_value("ar71xx", 0, "eeprom_mac_addr",
  200             &eeprom_mac_addr) != 0)
  201                 return (-1);
  202 
  203         /* get a pointer to the EEPROM MAC address */
  204 
  205         mac = (const char *) MIPS_PHYS_TO_KSEG1(eeprom_mac_addr);
  206 
  207         /* Check if it's ASCII or not */
  208         if (resource_int_value("ar71xx", 0, "eeprom_mac_isascii",
  209             &readascii) == 0 && readascii == 1) {
  210                 printf("ar71xx: Overriding MAC from EEPROM (ascii)\n");
  211                 for (i = 0; i < 6; i++) {
  212                         macaddr[i] = strtol(&(mac[i*3]), NULL, 16);
  213                 }
  214         } else {
  215                 printf("ar71xx: Overriding MAC from EEPROM\n");
  216                 for (i = 0; i < 6; i++) {
  217                         macaddr[i] = mac[i];
  218                 }
  219         }
  220 
  221         /* Set the default board MAC */
  222         (void) ar71xx_mac_addr_init(ar71xx_board_mac_addr,
  223             macaddr,
  224             0, /* offset */
  225             0); /* is_local */
  226         printf("ar71xx: Board MAC: %6D\n", ar71xx_board_mac_addr, ":");
  227         return (0);
  228 }
  229 
  230 /*
  231  * Populate a kenv hint for the given device based on the given
  232  * MAC address and offset.
  233  *
  234  * Returns 0 if ok, < 0 on error.
  235  */
  236 static int
  237 ar71xx_platform_set_mac_hint(const char *dev, int unit,
  238     const uint8_t *macaddr, int offset, int islocal)
  239 {
  240         char macstr[32];
  241         uint8_t lclmac[ETHER_ADDR_LEN];
  242         char devstr[32];
  243 
  244         /* Initialise the MAC address, plus/minus the offset */
  245         if (ar71xx_mac_addr_init(lclmac, macaddr, offset, islocal) != 0) {
  246                 return (-1);
  247         }
  248 
  249         /* Turn it into a string */
  250         snprintf(macstr, 32, "%6D", lclmac, ":");
  251         snprintf(devstr, 32, "hint.%s.%d.macaddr", dev, unit);
  252 
  253         printf("  %s => %s\n", devstr, macstr);
  254 
  255         /* Call setenv */
  256         if (kern_setenv(devstr, macstr) != 0) {
  257                 printf("%s: failed to set hint (%s => %s)\n",
  258                     __func__,
  259                     devstr,
  260                     macstr);
  261                 return (-1);
  262         }
  263 
  264         return (0);
  265 }
  266 
  267 /*
  268  * Iterate through the list of boot time hints that populate
  269  * a device MAC address hint based on the "board" MAC address.
  270  *
  271  * ar71xx_mac_map.X.devid=<device id, eg ath>
  272  * ar71xx_mac_map.X.unitid=<unit id, eg 0>
  273  * ar71xx_mac_map.X.offset=<mac address value offset>
  274  * ar71xx_mac_map.X.is_local=<1 or 0>
  275  */
  276 static int
  277 ar71xx_platform_check_mac_hints(void)
  278 {
  279         int i;
  280         const char *devid;
  281         int offset, is_local, unitid;
  282 
  283         for (i = 0; i < 8; i++) {
  284                 if (resource_string_value("ar71xx_mac_map", i, "devid",
  285                     &devid) != 0)
  286                         break;
  287                 if (resource_int_value("ar71xx_mac_map", i, "unitid",
  288                     &unitid) != 0)
  289                         break;
  290                 if (resource_int_value("ar71xx_mac_map", i, "offset",
  291                     &offset) != 0)
  292                         break;
  293                 if (resource_int_value("ar71xx_mac_map", i, "is_local",
  294                     &is_local) != 0)
  295                         break;
  296                 printf("ar71xx: devid '%s.%d', MAC offset '%d'\n",
  297                     devid, unitid, offset);
  298                 (void) ar71xx_platform_set_mac_hint(devid, unitid,
  299                     ar71xx_board_mac_addr, offset, is_local);
  300         }
  301 
  302         return (0);
  303 }
  304 
  305 extern char cpu_model[];
  306 
  307 void
  308 platform_start(__register_t a0 __unused, __register_t a1 __unused, 
  309     __register_t a2 __unused, __register_t a3 __unused)
  310 {
  311         uint64_t platform_counter_freq;
  312         int argc = 0, i;
  313         char **argv = NULL, **envp = NULL;
  314         vm_offset_t kernend;
  315 
  316         /* 
  317          * clear the BSS and SBSS segments, this should be first call in
  318          * the function
  319          */
  320         kernend = (vm_offset_t)&end;
  321         memset(&edata, 0, kernend - (vm_offset_t)(&edata));
  322 
  323         mips_postboot_fixup();
  324 
  325         /* Initialize pcpu stuff */
  326         mips_pcpu0_init();
  327 
  328         /*
  329          * Until some more sensible abstractions for uboot/redboot
  330          * environment handling, we have to make this a compile-time
  331          * hack.  The existing code handles the uboot environment
  332          * very incorrectly so we should just ignore initialising
  333          * the relevant pointers.
  334          */
  335 #ifndef AR71XX_ENV_UBOOT
  336         argc = a0;
  337         argv = (char**)a1;
  338         envp = (char**)a2;
  339 #endif
  340         /* 
  341          * Protect ourselves from garbage in registers 
  342          */
  343         if (MIPS_IS_VALID_PTR(envp)) {
  344                 for (i = 0; envp[i]; i += 2) {
  345                         if (strcmp(envp[i], "memsize") == 0)
  346                                 realmem = btoc(strtoul(envp[i+1], NULL, 16));
  347                         else if (strcmp(envp[i], "bootverbose") == 0)
  348                                 bootverbose = btoc(strtoul(envp[i+1], NULL, 10));
  349                 }
  350         }
  351         bootverbose = 1;
  352 
  353 #ifdef  AR71XX_ENV_ROUTERBOOT
  354         /*
  355          * RouterBoot informs the board memory as a command line argument.
  356          */
  357         if (realmem == 0)
  358                 realmem = ar71xx_routerboot_get_mem(argc, argv);
  359 #endif
  360 
  361         /*
  362          * Just wild guess. RedBoot let us down and didn't reported 
  363          * memory size
  364          */
  365         if (realmem == 0)
  366                 realmem = btoc(32*1024*1024);
  367 
  368         /*
  369          * Allow build-time override in case Redboot lies
  370          * or in other situations (eg where there's u-boot)
  371          * where there isn't (yet) a convienent method of
  372          * being told how much RAM is available.
  373          *
  374          * This happens on at least the Ubiquiti LS-SR71A
  375          * board, where redboot says there's 16mb of RAM
  376          * but in fact there's 32mb.
  377          */
  378 #if     defined(AR71XX_REALMEM)
  379                 realmem = btoc(AR71XX_REALMEM);
  380 #endif
  381 
  382         /* phys_avail regions are in bytes */
  383         phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
  384         phys_avail[1] = ctob(realmem);
  385 
  386         dump_avail[0] = phys_avail[0];
  387         dump_avail[1] = phys_avail[1] - phys_avail[0];
  388 
  389         physmem = realmem;
  390 
  391         /*
  392          * ns8250 uart code uses DELAY so ticker should be inititalized 
  393          * before cninit. And tick_init_params refers to hz, so * init_param1 
  394          * should be called first.
  395          */
  396         init_param1();
  397 
  398         /* Detect the system type - this is needed for subsequent chipset-specific calls */
  399         ar71xx_detect_sys_type();
  400         ar71xx_detect_sys_frequency();
  401 
  402         platform_counter_freq = ar71xx_cpu_freq();
  403         mips_timer_init_params(platform_counter_freq, 1);
  404         cninit();
  405         init_static_kenv(boot1_env, sizeof(boot1_env));
  406 
  407         printf("CPU platform: %s\n", ar71xx_get_system_type());
  408         printf("CPU Frequency=%d MHz\n", u_ar71xx_cpu_freq / 1000000);
  409         printf("CPU DDR Frequency=%d MHz\n", u_ar71xx_ddr_freq / 1000000);
  410         printf("CPU AHB Frequency=%d MHz\n", u_ar71xx_ahb_freq / 1000000);
  411         printf("platform frequency: %lld MHz\n", platform_counter_freq / 1000000);
  412         printf("CPU reference clock: %d MHz\n", u_ar71xx_refclk / 1000000);
  413         printf("CPU MDIO clock: %d MHz\n", u_ar71xx_mdio_freq / 1000000);
  414         printf("arguments: \n");
  415         printf("  a0 = %08x\n", a0);
  416         printf("  a1 = %08x\n", a1);
  417         printf("  a2 = %08x\n", a2);
  418         printf("  a3 = %08x\n", a3);
  419 
  420         strcpy(cpu_model, ar71xx_get_system_type());
  421 
  422         /*
  423          * XXX this code is very redboot specific.
  424          */
  425         printf("Cmd line:");
  426         if (MIPS_IS_VALID_PTR(argv)) {
  427                 for (i = 0; i < argc; i++) {
  428                         printf(" %s", argv[i]);
  429                         parse_argv(argv[i]);
  430                 }
  431         }
  432         else
  433                 printf ("argv is invalid");
  434         printf("\n");
  435 
  436         printf("Environment:\n");
  437         if (MIPS_IS_VALID_PTR(envp)) {
  438                 for (i = 0; envp[i]; i+=2) {
  439                         printf("  %s = %s\n", envp[i], envp[i+1]);
  440                         kern_setenv(envp[i], envp[i+1]);
  441                 }
  442         }
  443         else 
  444                 printf ("envp is invalid\n");
  445 
  446         /* Platform setup */
  447         init_param2(physmem);
  448         mips_cpu_init();
  449         pmap_bootstrap();
  450         mips_proc0_init();
  451         mutex_init();
  452 
  453         /*
  454          * Reset USB devices 
  455          */
  456         ar71xx_init_usb_peripheral();
  457 
  458         /*
  459          * Reset internal ethernet switch, if one exists
  460          */
  461         ar71xx_reset_ethernet_switch();
  462 
  463         /*
  464          * Initialise the gmac driver.
  465          */
  466         ar71xx_init_gmac();
  467 
  468         /* Redboot if_arge MAC address is in the environment */
  469         (void) ar71xx_redboot_get_macaddr();
  470 
  471         /* Various other boards need things to come out of EEPROM */
  472         (void) ar71xx_platform_read_eeprom_mac();
  473 
  474         /* Initialise the MAC address hint map */
  475         ar71xx_platform_check_mac_hints();
  476 
  477         kdb_init();
  478 #ifdef KDB
  479         if (boothowto & RB_KDB)
  480                 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
  481 #endif
  482 }
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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
