mtk_machdep.c

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    1 /*-
    2  * Copyright (C) 2015-2016 by Stanislav Galabov. All rights reserved.
    3  * Copyright (C) 2010-2011 by Aleksandr Rybalko. All rights reserved.
    4  * Copyright (C) 2007 by Oleksandr Tymoshenko. All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
   19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   21  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   25  * THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/11.0/sys/mips/mediatek/mtk_machdep.c 298127 2016-04-16 19:44:41Z sgalabov $");
   31 
   32 #include "opt_ddb.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/conf.h>
   36 #include <sys/kernel.h>
   37 #include <sys/systm.h>
   38 #include <sys/imgact.h>
   39 #include <sys/bio.h>
   40 #include <sys/buf.h>
   41 #include <sys/bus.h>
   42 #include <sys/cpu.h>
   43 #include <sys/cons.h>
   44 #include <sys/exec.h>
   45 #include <sys/ucontext.h>
   46 #include <sys/proc.h>
   47 #include <sys/kdb.h>
   48 #include <sys/ptrace.h>
   49 #include <sys/reboot.h>
   50 #include <sys/signalvar.h>
   51 #include <sys/sysent.h>
   52 #include <sys/sysproto.h>
   53 #include <sys/user.h>
   54 
   55 #include <vm/vm.h>
   56 #include <vm/vm_object.h>
   57 #include <vm/vm_page.h>
   58 
   59 #include <machine/cache.h>
   60 #include <machine/clock.h>
   61 #include <machine/cpu.h>
   62 #include <machine/cpuinfo.h>
   63 #include <machine/cpufunc.h>
   64 #include <machine/cpuregs.h>
   65 #include <machine/hwfunc.h>
   66 #include <machine/intr_machdep.h>
   67 #include <machine/locore.h>
   68 #include <machine/md_var.h>
   69 #include <machine/pte.h>
   70 #include <machine/sigframe.h>
   71 #include <machine/trap.h>
   72 #include <machine/vmparam.h>
   73 
   74 #include <mips/mediatek/mtk_sysctl.h>
   75 #include <mips/mediatek/mtk_soc.h>
   76 
   77 #include "opt_platform.h"
   78 #include "opt_rt305x.h"
   79 
   80 #include <dev/fdt/fdt_common.h>
   81 #include <dev/ofw/openfirm.h>
   82 
   83 extern int      *edata;
   84 extern int      *end;
   85 static char     boot1_env[0x1000];
   86 
   87 void
   88 platform_cpu_init()
   89 {
   90         /* Nothing special */
   91 }
   92 
   93 static void
   94 mips_init(void)
   95 {
   96         struct mem_region mr[FDT_MEM_REGIONS];
   97         uint64_t val;
   98         int i, j, mr_cnt;
   99         char *memsize;
  100 
  101         printf("entry: mips_init()\n");
  102 
  103         bootverbose = 1;
  104 
  105         for (i = 0; i < 10; i++)
  106                 phys_avail[i] = 0;
  107 
  108         dump_avail[0] = phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
  109 
  110         /*
  111          * The most low memory MT7621 can have. Currently MT7621 is the chip
  112          * that supports the most memory, so that seems reasonable.
  113          */
  114         realmem = btoc(448 * 1024 * 1024);
  115 
  116         if (fdt_get_mem_regions(mr, &mr_cnt, &val) == 0) {
  117                 physmem = btoc(val);
  118 
  119                 printf("RAM size: %ldMB (from FDT)\n",
  120                     ctob(physmem) / (1024 * 1024));
  121 
  122                 KASSERT((phys_avail[0] >= mr[0].mr_start) && \
  123                         (phys_avail[0] < (mr[0].mr_start + mr[0].mr_size)),
  124                         ("First region is not within FDT memory range"));
  125 
  126                 /* Limit size of the first region */
  127                 phys_avail[1] = (mr[0].mr_start +
  128                     MIN(mr[0].mr_size, ctob(realmem)));
  129                 dump_avail[1] = phys_avail[1];
  130 
  131                 /* Add the rest of the regions */
  132                 for (i = 1, j = 2; i < mr_cnt; i++, j+=2) {
  133                         phys_avail[j] = mr[i].mr_start;
  134                         phys_avail[j+1] = (mr[i].mr_start + mr[i].mr_size);
  135                         dump_avail[j] = phys_avail[j];
  136                         dump_avail[j+1] = phys_avail[j+1];
  137                 }
  138         } else {
  139                 if ((memsize = kern_getenv("memsize")) != NULL) {
  140                         physmem = btoc(strtol(memsize, NULL, 0) << 20);
  141                         printf("RAM size: %ldMB (from memsize)\n",
  142                             ctob(physmem) / (1024 * 1024));
  143                 } else { /* All else failed, assume 32MB */
  144                         physmem = btoc(32 * 1024 * 1024);
  145                         printf("RAM size: %ldMB (assumed)\n",
  146                             ctob(physmem) / (1024 * 1024));
  147                 }
  148 
  149                 if (ctob(physmem) < (448 * 1024 * 1024)) {
  150                         /*
  151                          * Anything up to 448MB is assumed to be directly
  152                          * mappable as low memory...
  153                          */
  154                         dump_avail[1] = phys_avail[1] = ctob(physmem);
  155                 } else if (mtk_soc_get_socid() == MTK_SOC_MT7621) {
  156                         /*
  157                          * On MT7621 the low memory is limited to 448MB, the
  158                          * rest is high memory, mapped at 0x20000000
  159                          */
  160                         phys_avail[1] = 448 * 1024 * 1024;
  161                         phys_avail[2] = 0x20000000;
  162                         phys_avail[3] = phys_avail[2] + ctob(physmem) -
  163                             phys_avail[1];
  164                         dump_avail[1] = phys_avail[1] - phys_avail[0];
  165                         dump_avail[2] = phys_avail[2];
  166                         dump_avail[3] = phys_avail[3] - phys_avail[2];
  167                 } else {
  168                         /*
  169                          * We have > 448MB RAM and we're not MT7621? Currently
  170                          * there is no such chip, so we'll just limit the RAM to
  171                          * 32MB and let the user know...
  172                          */
  173                         printf("Unknown chip, assuming 32MB RAM\n");
  174                         physmem = btoc(32 * 1024 * 1024);
  175                         dump_avail[1] = phys_avail[1] = ctob(physmem);
  176                 }
  177         }
  178 
  179         if (physmem < realmem)
  180                 realmem = physmem;
  181 
  182         init_param1();
  183         init_param2(physmem);
  184         mips_cpu_init();
  185         pmap_bootstrap();
  186         mips_proc0_init();
  187         mutex_init();
  188         kdb_init();
  189 #ifdef KDB
  190         if (boothowto & RB_KDB)
  191                 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
  192 #endif
  193 }
  194 
  195 static void
  196 _parse_bootarg(char *v)
  197 {
  198         char *n;
  199 
  200         if (*v == '-') {
  201                 while (*v != '\0') {
  202                         v++;
  203                         switch (*v) {
  204                         case 'a': boothowto |= RB_ASKNAME; break;
  205                         /* Someone should simulate that ;-) */
  206                         case 'C': boothowto |= RB_CDROM; break;
  207                         case 'd': boothowto |= RB_KDB; break;
  208                         case 'D': boothowto |= RB_MULTIPLE; break;
  209                         case 'm': boothowto |= RB_MUTE; break;
  210                         case 'g': boothowto |= RB_GDB; break;
  211                         case 'h': boothowto |= RB_SERIAL; break;
  212                         case 'p': boothowto |= RB_PAUSE; break;
  213                         case 'r': boothowto |= RB_DFLTROOT; break;
  214                         case 's': boothowto |= RB_SINGLE; break;
  215                         case 'v': boothowto |= RB_VERBOSE; break;
  216                         }
  217                 }
  218         } else {
  219                 n = strsep(&v, "=");
  220                 if (v == NULL)
  221                         kern_setenv(n, "1");
  222                 else
  223                         kern_setenv(n, v);
  224         }
  225 }
  226 
  227 /* Parse cmd line args as env - copied from xlp_machdep. */
  228 /* XXX-BZ this should really be centrally provided for all (boot) code. */
  229 static void
  230 _parse_bootargs(char *cmdline)
  231 {
  232         char *v;
  233 
  234         while ((v = strsep(&cmdline, " \n")) != NULL) {
  235                 if (*v == '\0')
  236                         continue;
  237                 _parse_bootarg(v);
  238         }
  239 }
  240 
  241 void
  242 platform_reset(void)
  243 {
  244 
  245         mtk_soc_reset();
  246 }
  247 
  248 void
  249 platform_start(__register_t a0 __unused, __register_t a1 __unused, 
  250     __register_t a2 __unused, __register_t a3 __unused)
  251 {
  252         vm_offset_t kernend;
  253         int argc = a0, i;//, res;
  254         uint32_t timer_clk;
  255         char **argv = (char **)MIPS_PHYS_TO_KSEG0(a1);
  256         char **envp = (char **)MIPS_PHYS_TO_KSEG0(a2);
  257         void *dtbp;
  258         phandle_t chosen;
  259         char buf[2048];
  260 
  261         /* clear the BSS and SBSS segments */
  262         kernend = (vm_offset_t)&end;
  263         memset(&edata, 0, kernend - (vm_offset_t)(&edata));
  264 
  265         mips_postboot_fixup();
  266 
  267         /* Initialize pcpu stuff */
  268         mips_pcpu0_init();
  269 
  270         dtbp = &fdt_static_dtb;
  271         if (OF_install(OFW_FDT, 0) == FALSE)
  272                 while (1);
  273         if (OF_init((void *)dtbp) != 0)
  274                 while (1);
  275 
  276         mtk_soc_try_early_detect();
  277         if ((timer_clk = mtk_soc_get_timerclk()) == 0)
  278                 timer_clk = 1000000000; /* no such speed yet */
  279 
  280         mips_timer_early_init(timer_clk);
  281 
  282         /* initialize console so that we have printf */
  283         boothowto |= (RB_SERIAL | RB_MULTIPLE); /* Use multiple consoles */
  284         boothowto |= (RB_VERBOSE);
  285         cninit();
  286 
  287         init_static_kenv(boot1_env, sizeof(boot1_env));
  288 
  289         /*
  290          * Get bsdbootargs from FDT if specified.
  291          */
  292         chosen = OF_finddevice("/chosen");
  293         if (OF_getprop(chosen, "bsdbootargs", buf, sizeof(buf)) != -1)
  294                 _parse_bootargs(buf);
  295 
  296         printf("FDT DTB  at: 0x%08x\n", (uint32_t)dtbp);
  297 
  298         printf("CPU   clock: %4dMHz\n", mtk_soc_get_cpuclk()/(1000*1000));
  299         printf("Timer clock: %4dMHz\n", timer_clk/(1000*1000));
  300         printf("UART  clock: %4dMHz\n\n", mtk_soc_get_uartclk()/(1000*1000));
  301 
  302         printf("U-Boot args (from %d args):\n", argc - 1);
  303 
  304         if (argc == 1)
  305                 printf("\tNone\n");
  306 
  307         for (i = 1; i < argc; i++) {
  308                 char *n = "argv  ", *arg;
  309 
  310                 if (i > 99)
  311                         break;
  312 
  313                 if (argv[i])
  314                 {
  315                         arg = (char *)(intptr_t)MIPS_PHYS_TO_KSEG0(argv[i]);
  316                         printf("\targv[%d] = %s\n", i, arg);
  317                         sprintf(n, "argv%d", i);
  318                         kern_setenv(n, arg);
  319                 }
  320         }
  321 
  322         printf("Environment:\n");
  323 
  324         for (i = 0; envp[i] && MIPS_IS_VALID_PTR(envp[i]); i++) {
  325                 char *n, *arg;
  326 
  327                 arg = (char *)(intptr_t)MIPS_PHYS_TO_KSEG0(envp[i]);
  328                 if (! MIPS_IS_VALID_PTR(arg))
  329                         continue;
  330                 printf("\t%s\n", arg);
  331                 n = strsep(&arg, "=");
  332                 if (arg == NULL)
  333                         kern_setenv(n, "1");
  334                 else
  335                         kern_setenv(n, arg);
  336         }
  337 
  338 
  339         mips_init();
  340         mips_timer_init_params(timer_clk, 0);
  341 }
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FreeBSD/Linux Kernel Cross Reference sys/mips/mediatek/mtk_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/mips/mediatek/mtk_machdep.c
