sys/arch/evbarm/hdl_g/hdlg_machdep.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe and Steve C. Woodford for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Copyright (c) 1997,1998 Mark Brinicombe.
  40  * Copyright (c) 1997,1998 Causality Limited.
  41  * All rights reserved.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. All advertising materials mentioning features or use of this software
  52  *    must display the following acknowledgement:
  53  *      This product includes software developed by Mark Brinicombe
  54  *      for the NetBSD Project.
  55  * 4. The name of the company nor the name of the author may be used to
  56  *    endorse or promote products derived from this software without specific
  57  *    prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  60  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  61  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  62  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  63  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  64  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  65  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  * Machine dependant functions for kernel setup for GigaLANDISK
  72  * using RedBoot firmware.
  73  */
  74
  75 #include <sys/cdefs.h>
  76 __KERNEL_RCSID(0, "$NetBSD$");
  77
  78 #include "opt_ddb.h"
  79 #include "opt_kgdb.h"
  80 #include "opt_pmap_debug.h"
  81
  82 #include <sys/param.h>
  83 #include <sys/device.h>
  84 #include <sys/systm.h>
  85 #include <sys/kernel.h>
  86 #include <sys/exec.h>
  87 #include <sys/proc.h>
  88 #include <sys/msgbuf.h>
  89 #include <sys/reboot.h>
  90 #include <sys/termios.h>
  91 #include <sys/ksyms.h>
  92
  93 #include <uvm/uvm_extern.h>
  94
  95 #include <dev/cons.h>
  96
  97 #include <machine/db_machdep.h>
  98 #include <ddb/db_sym.h>
  99 #include <ddb/db_extern.h>
 100
 101 #include <machine/bootconfig.h>
 102 #include <machine/bus.h>
 103 #include <machine/cpu.h>
 104 #include <machine/frame.h>
 105 #include <arm/undefined.h>
 106
 107 #include <arm/arm32/machdep.h>
 108
 109 #include <arm/xscale/i80321reg.h>
 110 #include <arm/xscale/i80321var.h>
 111
 112 #include <dev/pci/ppbreg.h>
 113
 114 #include <evbarm/hdl_g/hdlgreg.h>
 115 #include <evbarm/hdl_g/hdlgvar.h>
 116 #include <evbarm/hdl_g/obiovar.h>
 117
 118 #include "ksyms.h"
 119
 120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
 121 #define KERNEL_TEXT_BASE        (KERNEL_BASE + 0x00200000)
 122 #define KERNEL_VM_BASE          (KERNEL_BASE + 0x01000000)
 123
 124 /*
 125  * The range 0xc1000000 - 0xccffffff is available for kernel VM space
 126  * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
 127  */
 128 #define KERNEL_VM_SIZE          0x0C000000
 129
 130 /*
 131  * Address to call from cpu_reset() to reset the machine.
 132  * This is machine architecture dependant as it varies depending
 133  * on where the ROM appears when you turn the MMU off.
 134  *
 135  * XXX Not actually used on hdlg -- clean up the generic
 136  * ARM code.
 137  */
 138 u_int cpu_reset_address = 0x00000000;
 139
 140 /* Define various stack sizes in pages */
 141 #define IRQ_STACK_SIZE  1
 142 #define ABT_STACK_SIZE  1
 143 #define UND_STACK_SIZE  1
 144
 145 BootConfig bootconfig;          /* Boot config storage */
 146 char *boot_args = NULL;
 147 char *boot_file = NULL;
 148
 149 vm_offset_t physical_start;
 150 vm_offset_t physical_freestart;
 151 vm_offset_t physical_freeend;
 152 vm_offset_t physical_end;
 153 u_int free_pages;
 154
 155 /*int debug_flags;*/
 156 #ifndef PMAP_STATIC_L1S
 157 int max_processes = 64;                 /* Default number */
 158 #endif  /* !PMAP_STATIC_L1S */
 159
 160 /* Physical and virtual addresses for some global pages */
 161 pv_addr_t irqstack;
 162 pv_addr_t undstack;
 163 pv_addr_t abtstack;
 164 pv_addr_t kernelstack;
 165 pv_addr_t minidataclean;
 166
 167 vm_offset_t msgbufphys;
 168
 169 extern u_int data_abort_handler_address;
 170 extern u_int prefetch_abort_handler_address;
 171 extern u_int undefined_handler_address;
 172
 173 #ifdef PMAP_DEBUG
 174 extern int pmap_debug_level;
 175 #endif
 176
 177 #define KERNEL_PT_SYS           0       /* L2 table for mapping zero page */
 178
 179 #define KERNEL_PT_KERNEL        1       /* L2 table for mapping kernel */
 180 #define KERNEL_PT_KERNEL_NUM    4
 181
 182                                         /* L2 table for mapping i80321 */
 183 #define KERNEL_PT_IOPXS         (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
 184
 185                                         /* L2 tables for mapping kernel VM */
 186 #define KERNEL_PT_VMDATA        (KERNEL_PT_IOPXS + 1)
 187 #define KERNEL_PT_VMDATA_NUM    4       /* start with 16MB of KVM */
 188 #define NUM_KERNEL_PTS          (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
 189
 190 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
 191
 192 /* Prototypes */
 193 void consinit(void);
 194
 195 /* Static device mappings. */
 196 static const struct pmap_devmap hdlg_devmap[] = {
 197     /*
 198      * Map the on-board devices VA == PA so that we can access them
 199      * with the MMU on or off.
 200      */
 201     {
 202         HDLG_OBIO_BASE,
 203         HDLG_OBIO_BASE,
 204         HDLG_OBIO_SIZE,
 205         VM_PROT_READ|VM_PROT_WRITE,
 206         PTE_NOCACHE,
 207     },
 208
 209     {
 210         HDLG_IOW_VBASE,
 211         VERDE_OUT_XLATE_IO_WIN0_BASE,
 212         VERDE_OUT_XLATE_IO_WIN_SIZE,
 213         VM_PROT_READ|VM_PROT_WRITE,
 214         PTE_NOCACHE,
 215    },
 216
 217    {
 218         HDLG_80321_VBASE,
 219         VERDE_PMMR_BASE,
 220         VERDE_PMMR_SIZE,
 221         VM_PROT_READ|VM_PROT_WRITE,
 222         PTE_NOCACHE,
 223    },
 224
 225    {
 226         0,
 227         0,
 228         0,
 229         0,
 230         0,
 231     }
 232 };
 233
 234 static void
 235 hardclock_hook(void)
 236 {
 237
 238         /* Nothing to do */
 239 }
 240
 241 /*
 242  * u_int initarm(...)
 243  *
 244  * Initial entry point on startup. This gets called before main() is
 245  * entered.
 246  * It should be responsible for setting up everything that must be
 247  * in place when main is called.
 248  * This includes
 249  *   Taking a copy of the boot configuration structure.
 250  *   Initialising the physical console so characters can be printed.
 251  *   Setting up page tables for the kernel
 252  *   Relocating the kernel to the bottom of physical memory
 253  */
 254 u_int
 255 initarm(void *arg)
 256 {
 257         extern vaddr_t xscale_cache_clean_addr;
 258 #ifdef DIAGNOSTIC
 259         extern vsize_t xscale_minidata_clean_size;
 260 #endif
 261         int loop;
 262         int loop1;
 263         u_int l1pagetable;
 264         paddr_t memstart;
 265         psize_t memsize;
 266
 267         /* Calibrate the delay loop. */
 268         i80321_calibrate_delay();
 269         i80321_hardclock_hook = hardclock_hook;
 270
 271         /*
 272          * Since we map the on-board devices VA==PA, and the kernel
 273          * is running VA==PA, it's possible for us to initialize
 274          * the console now.
 275          */
 276         consinit();
 277
 278 #ifdef VERBOSE_INIT_ARM
 279         /* Talk to the user */
 280         printf("\nNetBSD/evbarm (HDL-G) booting ...\n");
 281 #endif
 282
 283         /*
 284          * Heads up ... Setup the CPU / MMU / TLB functions
 285          */
 286         if (set_cpufuncs())
 287                 panic("CPU not recognized!");
 288
 289         /*
 290          * We are currently running with the MMU enabled and the
 291          * entire address space mapped VA==PA, except for the
 292          * first 64M of RAM is also double-mapped at 0xc0000000.
 293          * There is an L1 page table at 0xa0004000.
 294          */
 295
 296         /*
 297          * Fetch the SDRAM start/size from the i80321 SDRAM configuration
 298          * registers.
 299          */
 300         i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
 301             &memstart, &memsize);
 302
 303 #ifdef VERBOSE_INIT_ARM
 304         printf("initarm: Configuring system ...\n");
 305 #endif
 306
 307         /* Fake bootconfig structure for the benefit of pmap.c */
 308         /* XXX must make the memory description h/w independent */
 309         bootconfig.dramblocks = 1;
 310         bootconfig.dram[0].address = memstart;
 311         bootconfig.dram[0].pages = memsize / PAGE_SIZE;
 312
 313         /*
 314          * Set up the variables that define the availablilty of
 315          * physical memory.  For now, we're going to set
 316          * physical_freestart to 0xa0200000 (where the kernel
 317          * was loaded), and allocate the memory we need downwards.
 318          * If we get too close to the L1 table that we set up, we
 319          * will panic.  We will update physical_freestart and
 320          * physical_freeend later to reflect what pmap_bootstrap()
 321          * wants to see.
 322          *
 323          * XXX pmap_bootstrap() needs an enema.
 324          */
 325         physical_start = bootconfig.dram[0].address;
 326         physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
 327
 328         physical_freestart = 0xa0009000UL;
 329         physical_freeend = 0xa0200000UL;
 330
 331         physmem = (physical_end - physical_start) / PAGE_SIZE;
 332
 333 #ifdef VERBOSE_INIT_ARM
 334         /* Tell the user about the memory */
 335         printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
 336             physical_start, physical_end - 1);
 337 #endif
 338
 339         /*
 340          * Okay, the kernel starts 2MB in from the bottom of physical
 341          * memory.  We are going to allocate our bootstrap pages downwards
 342          * from there.
 343          *
 344          * We need to allocate some fixed page tables to get the kernel
 345          * going.  We allocate one page directory and a number of page
 346          * tables and store the physical addresses in the kernel_pt_table
 347          * array.
 348          *
 349          * The kernel page directory must be on a 16K boundary.  The page
 350          * tables must be on 4K boundaries.  What we do is allocate the
 351          * page directory on the first 16K boundary that we encounter, and
 352          * the page tables on 4K boundaries otherwise.  Since we allocate
 353          * at least 3 L2 page tables, we are guaranteed to encounter at
 354          * least one 16K aligned region.
 355          */
 356
 357 #ifdef VERBOSE_INIT_ARM
 358         printf("Allocating page tables\n");
 359 #endif
 360
 361         free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
 362
 363 #ifdef VERBOSE_INIT_ARM
 364         printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
 365                physical_freestart, free_pages, free_pages);
 366 #endif
 367
 368         /* Define a macro to simplify memory allocation */
 369 #define valloc_pages(var, np)                           \
 370         alloc_pages((var).pv_pa, (np));                 \
 371         (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
 372
 373 #define alloc_pages(var, np)                            \
 374         physical_freeend -= ((np) * PAGE_SIZE);         \
 375         if (physical_freeend < physical_freestart)      \
 376                 panic("initarm: out of memory");        \
 377         (var) = physical_freeend;                       \
 378         free_pages -= (np);                             \
 379         memset((char *)(var), 0, ((np) * PAGE_SIZE));
 380
 381         loop1 = 0;
 382         for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
 383                 /* Are we 16KB aligned for an L1 ? */
 384                 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
 385                     && kernel_l1pt.pv_pa == 0) {
 386                         valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
 387                 } else {
 388                         valloc_pages(kernel_pt_table[loop1],
 389                             L2_TABLE_SIZE / PAGE_SIZE);
 390                         ++loop1;
 391                 }
 392         }
 393
 394         /* This should never be able to happen but better confirm that. */
 395         if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
 396                 panic("initarm: Failed to align the kernel page directory");
 397
 398         /*
 399          * Allocate a page for the system page mapped to V0x00000000
 400          * This page will just contain the system vectors and can be
 401          * shared by all processes.
 402          */
 403         alloc_pages(systempage.pv_pa, 1);
 404
 405         /* Allocate stacks for all modes */
 406         valloc_pages(irqstack, IRQ_STACK_SIZE);
 407         valloc_pages(abtstack, ABT_STACK_SIZE);
 408         valloc_pages(undstack, UND_STACK_SIZE);
 409         valloc_pages(kernelstack, UPAGES);
 410
 411         /* Allocate enough pages for cleaning the Mini-Data cache. */
 412         KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
 413         valloc_pages(minidataclean, 1);
 414
 415 #ifdef VERBOSE_INIT_ARM
 416         printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
 417             irqstack.pv_va);
 418         printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
 419             abtstack.pv_va);
 420         printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
 421             undstack.pv_va);
 422         printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
 423             kernelstack.pv_va);
 424 #endif
 425
 426         /*
 427          * XXX Defer this to later so that we can reclaim the memory
 428          * XXX used by the RedBoot page tables.
 429          */
 430         alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
 431
 432         /*
 433          * Ok we have allocated physical pages for the primary kernel
 434          * page tables
 435          */
 436
 437 #ifdef VERBOSE_INIT_ARM
 438         printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
 439 #endif
 440
 441         /*
 442          * Now we start construction of the L1 page table
 443          * We start by mapping the L2 page tables into the L1.
 444          * This means that we can replace L1 mappings later on if necessary
 445          */
 446         l1pagetable = kernel_l1pt.pv_pa;
 447
 448         /* Map the L2 pages tables in the L1 page table */
 449         pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
 450             &kernel_pt_table[KERNEL_PT_SYS]);
 451         for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
 452                 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
 453                     &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
 454         pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE,
 455             &kernel_pt_table[KERNEL_PT_IOPXS]);
 456         for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
 457                 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
 458                     &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
 459
 460         /* update the top of the kernel VM */
 461         pmap_curmaxkvaddr =
 462             KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
 463
 464 #ifdef VERBOSE_INIT_ARM
 465         printf("Mapping kernel\n");
 466 #endif
 467
 468         /* Now we fill in the L2 pagetable for the kernel static code/data */
 469         {
 470                 extern char etext[], _end[];
 471                 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
 472                 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
 473                 u_int logical;
 474
 475                 textsize = (textsize + PGOFSET) & ~PGOFSET;
 476                 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
 477
 478                 logical = 0x00200000;   /* offset of kernel in RAM */
 479
 480                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 481                     physical_start + logical, textsize,
 482                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 483                 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
 484                     physical_start + logical, totalsize - textsize,
 485                     VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 486         }
 487
 488 #ifdef VERBOSE_INIT_ARM
 489         printf("Constructing L2 page tables\n");
 490 #endif
 491
 492         /* Map the stack pages */
 493         pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
 494             IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 495         pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
 496             ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 497         pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
 498             UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 499         pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
 500             UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 501
 502         pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
 503             L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 504
 505         for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
 506                 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
 507                     kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
 508                     VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
 509         }
 510
 511         /* Map the Mini-Data cache clean area. */
 512         xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
 513             minidataclean.pv_pa);
 514
 515         /* Map the vector page. */
 516         pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
 517             VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
 518
 519         /* Map the statically mapped devices. */
 520         pmap_devmap_bootstrap(l1pagetable, hdlg_devmap);
 521
 522         /*
 523          * Give the XScale global cache clean code an appropriately
 524          * sized chunk of unmapped VA space starting at 0xff000000
 525          * (our device mappings end before this address).
 526          */
 527         xscale_cache_clean_addr = 0xff000000U;
 528
 529         /*
 530          * Now we have the real page tables in place so we can switch to them.
 531          * Once this is done we will be running with the REAL kernel page
 532          * tables.
 533          */
 534
 535         /*
 536          * Update the physical_freestart/physical_freeend/free_pages
 537          * variables.
 538          */
 539         {
 540                 extern char _end[];
 541
 542                 physical_freestart = physical_start +
 543                     (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
 544                      KERNEL_BASE);
 545                 physical_freeend = physical_end;
 546                 free_pages =
 547                     (physical_freeend - physical_freestart) / PAGE_SIZE;
 548         }
 549
 550         /* Switch tables */
 551 #ifdef VERBOSE_INIT_ARM
 552         printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
 553                physical_freestart, free_pages, free_pages);
 554         printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
 555 #endif
 556         cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
 557         cpu_setttb(kernel_l1pt.pv_pa);
 558         cpu_tlb_flushID();
 559         cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
 560
 561         /*
 562          * Moved from cpu_startup() as data_abort_handler() references
 563          * this during uvm init
 564          */
 565         uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
 566
 567 #ifdef VERBOSE_INIT_ARM
 568         printf("done!\n");
 569 #endif
 570
 571 #ifdef VERBOSE_INIT_ARM
 572         printf("bootstrap done.\n");
 573 #endif
 574
 575         arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
 576
 577         /*
 578          * Pages were allocated during the secondary bootstrap for the
 579          * stacks for different CPU modes.
 580          * We must now set the r13 registers in the different CPU modes to
 581          * point to these stacks.
 582          * Since the ARM stacks use STMFD etc. we must set r13 to the top end
 583          * of the stack memory.
 584          */
 585 #ifdef VERBOSE_INIT_ARM
 586         printf("init subsystems: stacks ");
 587 #endif
 588
 589         set_stackptr(PSR_IRQ32_MODE,
 590             irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
 591         set_stackptr(PSR_ABT32_MODE,
 592             abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
 593         set_stackptr(PSR_UND32_MODE,
 594             undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
 595
 596         /*
 597          * Well we should set a data abort handler.
 598          * Once things get going this will change as we will need a proper
 599          * handler.
 600          * Until then we will use a handler that just panics but tells us
 601          * why.
 602          * Initialisation of the vectors will just panic on a data abort.
 603          * This just fills in a slightly better one.
 604          */
 605 #ifdef VERBOSE_INIT_ARM
 606         printf("vectors ");
 607 #endif
 608         data_abort_handler_address = (u_int)data_abort_handler;
 609         prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
 610         undefined_handler_address = (u_int)undefinedinstruction_bounce;
 611
 612         /* Initialise the undefined instruction handlers */
 613 #ifdef VERBOSE_INIT_ARM
 614         printf("undefined ");
 615 #endif
 616         undefined_init();
 617
 618         /* Load memory into UVM. */
 619 #ifdef VERBOSE_INIT_ARM
 620         printf("page ");
 621 #endif
 622         uvm_setpagesize();      /* initialize PAGE_SIZE-dependent variables */
 623         uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
 624             atop(physical_freestart), atop(physical_freeend),
 625             VM_FREELIST_DEFAULT);
 626
 627         /* Boot strap pmap telling it where the kernel page table is */
 628 #ifdef VERBOSE_INIT_ARM
 629         printf("pmap ");
 630 #endif
 631         pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
 632
 633         /* Setup the IRQ system */
 634 #ifdef VERBOSE_INIT_ARM
 635         printf("irq ");
 636 #endif
 637         i80321_intr_init();
 638
 639 #ifdef VERBOSE_INIT_ARM
 640         printf("done.\n");
 641 #endif
 642
 643 #ifdef BOOTHOWTO
 644         boothowto = BOOTHOWTO;
 645 #endif
 646
 647 #ifdef DDB
 648         db_machine_init();
 649         if (boothowto & RB_KDB)
 650                 Debugger();
 651 #endif
 652
 653         /* We return the new stack pointer address */
 654         return (kernelstack.pv_va + USPACE_SVC_STACK_TOP);
 655 }
 656
 657 /*
 658  * void cpu_reboot(int howto, char *bootstr)
 659  *
 660  * Reboots the system
 661  *
 662  * Deal with any syncing, unmounting, dumping and shutdown hooks,
 663  * then reset the CPU.
 664  */
 665 void
 666 cpu_reboot(int howto, char *bootstr)
 667 {
 668
 669         /*
 670          * If we are still cold then hit the air brakes
 671          * and crash to earth fast
 672          */
 673         if (cold) {
 674                 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED;
 675                 howto |= RB_HALT;
 676                 goto haltsys;
 677         }
 678
 679         /* Disable console buffering */
 680
 681         /*
 682          * If RB_NOSYNC was not specified sync the discs.
 683          * Note: Unless cold is set to 1 here, syslogd will die during the
 684          * unmount.  It looks like syslogd is getting woken up only to find
 685          * that it cannot page part of the binary in as the filesystem has
 686          * been unmounted.
 687          */
 688         if ((howto & RB_NOSYNC) == 0) {
 689                 bootsync();
 690                 /*resettodr();*/
 691         }
 692
 693         /* wait 1s */
 694         delay(1 * 1000 * 1000);
 695
 696         /* Say NO to interrupts */
 697         splhigh();
 698
 699         /* Do a dump if requested. */
 700         if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) {
 701                 dumpsys();
 702         }
 703
 704 haltsys:
 705         /* Run any shutdown hooks */
 706         doshutdownhooks();
 707
 708         pmf_system_shutdown(boothowto);
 709
 710         /* Make sure IRQ's are disabled */
 711         IRQdisable;
 712
 713         if (howto & RB_HALT) {
 714                 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF;
 715                 delay(3 * 1000 * 1000); /* wait 3s */
 716
 717                 printf("SHUTDOWN FAILED!\n");
 718                 printf("The operating system has halted.\n");
 719                 printf("Please press any key to reboot.\n\n");
 720                 cngetc();
 721         }
 722
 723         printf("rebooting...\n\r");
 724
 725         (void)disable_interrupts(I32_bit|F32_bit);
 726         cpu_idcache_wbinv_all();
 727         cpu_drain_writebuf();
 728
 729         *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET;
 730         delay(1 * 1000 * 1000); /* wait 1s */
 731
 732         /* ...and if that didn't work, just croak. */
 733         printf("RESET FAILED!\n");
 734         for (;;) {
 735                 continue;
 736         }
 737 }
 738
 739 /*
 740  * console
 741  */
 742 #include "com.h"
 743 #if NCOM > 0
 744 #include <dev/ic/comreg.h>
 745 #include <dev/ic/comvar.h>
 746 #endif
 747
 748 /*
 749  * Define the default console speed for the board.  This is generally
 750  * what the firmware provided with the board defaults to.
 751  */
 752 #ifndef CONSPEED
 753 #define CONSPEED B115200
 754 #endif /* ! CONSPEED */
 755
 756 #ifndef CONUNIT
 757 #define CONUNIT 0
 758 #endif
 759
 760 #ifndef CONMODE
 761 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
 762 #endif
 763
 764 int comcnspeed = CONSPEED;
 765 int comcnmode = CONMODE;
 766 int comcnunit = CONUNIT;
 767
 768 #if KGDB
 769 #ifndef KGDB_DEVNAME
 770 #error Must define KGDB_DEVNAME
 771 #endif
 772 const char kgdb_devname[] = KGDB_DEVNAME;
 773
 774 #ifndef KGDB_DEVADDR
 775 #error Must define KGDB_DEVADDR
 776 #endif
 777 unsigned long kgdb_devaddr = KGDB_DEVADDR;
 778
 779 #ifndef KGDB_DEVRATE
 780 #define KGDB_DEVRATE    CONSPEED
 781 #endif
 782 int kgdb_devrate = KGDB_DEVRATE;
 783
 784 #ifndef KGDB_DEVMODE
 785 #define KGDB_DEVMODE    CONMODE
 786 #endif
 787 int kgdb_devmode = KGDB_DEVMODE;
 788 #endif /* KGDB */
 789
 790 void
 791 consinit(void)
 792 {
 793         static const bus_addr_t comcnaddrs[] = {
 794                 HDLG_UART1,             /* com0 */
 795         };
 796         static int consinit_called;
 797
 798         if (consinit_called)
 799                 return;
 800         consinit_called = 1;
 801
 802         /*
 803          * Console devices are mapped VA==PA.  Our devmap reflects
 804          * this, so register it now so drivers can map the console
 805          * device.
 806          */
 807         pmap_devmap_register(hdlg_devmap);
 808
 809 #if NCOM > 0
 810         if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
 811             COM_FREQ, COM_TYPE_NORMAL, comcnmode))
 812                 panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
 813 #else
 814         panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
 815 #endif
 816 #if KGDB
 817 #if NCOM > 0
 818         if (strcmp(kgdb_devname, "com") == 0) {
 819                 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate,
 820                                 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode);
 821         }
 822 #endif  /* NCOM > 0 */
 823 #endif  /* KGDB */
 824 }