FreeBSD/Linux Kernel Cross Reference
sys/osfmk/i386/AT386/model_dep.c

     /*
      * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
      * Version 2.0 (the 'License'). You may not use this file except in
      * compliance with the License. The rights granted to you under the License
     * may not be used to create, or enable the creation or redistribution of,
     * unlawful or unlicensed copies of an Apple operating system, or to
     * circumvent, violate, or enable the circumvention or violation of, any
     * terms of an Apple operating system software license agreement.
     * 
     * Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
    /*
     * @OSF_COPYRIGHT@
     */
    /* 
     * Mach Operating System
     * Copyright (c) 1991,1990,1989, 1988 Carnegie Mellon University
     * All Rights Reserved.
     * 
     * Permission to use, copy, modify and distribute this software and its
     * documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    
    /*
     */
    
    /*
     *      File:   model_dep.c
     *      Author: Avadis Tevanian, Jr., Michael Wayne Young
     *
     *      Copyright (C) 1986, Avadis Tevanian, Jr., Michael Wayne Young
     *
     *      Basic initialization for I386 - ISA bus machines.
     */
    
    #include <platforms.h>
    #include <mach_kdb.h>
    
    #include <mach/i386/vm_param.h>
    
    #include <string.h>
    #include <mach/vm_param.h>
    #include <mach/vm_prot.h>
    #include <mach/machine.h>
    #include <mach/time_value.h>
    #include <kern/spl.h>
    #include <kern/assert.h>
    #include <kern/debug.h>
    #include <kern/misc_protos.h>
    #include <kern/startup.h>
    #include <kern/clock.h>
    #include <kern/cpu_data.h>
    #include <kern/machine.h>
    #include <i386/fpu.h>
    #include <i386/ipl.h>
    #include <i386/misc_protos.h>
    #include <i386/mtrr.h>
    #include <i386/machine_routines.h>
    #include <i386/pmCPU.h>
    #include <i386/postcode.h>
    #include <i386/trap.h>
    #include <i386/mp.h>            /* mp_rendezvous_break_lock */
    #include <architecture/i386/pio.h> /* inb() */
    #include <pexpert/i386/boot.h>
    #if     MACH_KDB
    #include <ddb/db_aout.h>
   #endif /* MACH_KDB */
   
   #include <vm/pmap.h>
   #include <vm/vm_map.h>
   #include <vm/vm_kern.h>
   
   #include <i386/mp_desc.h>
   #include <i386/mp.h>
   #include <i386/cpuid.h>
   
   #include <IOKit/IOPlatformExpert.h>
   #include <IOKit/IOHibernatePrivate.h>
   
   #include <pexpert/i386/efi.h>
   
   #include <kern/thread.h>
   #include <i386/thread.h>
   #include <mach-o/loader.h>
   #include <mach-o/nlist.h>
   
   void    enable_bluebox(void);
   void    disable_bluebox(void);
   
   static void machine_conf(void);
   
   extern int              default_preemption_rate;
   extern int              max_unsafe_quanta;
   extern int              max_poll_quanta;
   extern unsigned int     panic_is_inited;
   
   int db_run_mode;
   
   volatile int pbtcpu = -1;
   hw_lock_data_t pbtlock;         /* backtrace print lock */
   uint32_t pbtcnt = 0;
   
   typedef struct _cframe_t {
       struct _cframe_t    *prev;
       unsigned            caller;
       unsigned            args[0];
   } cframe_t;
   
   static unsigned panic_io_port;
   static unsigned commit_paniclog_to_nvram;
   
   void
   machine_startup(void)
   {
           int     boot_arg;
   
   #if 0
           if( PE_get_hotkey( kPEControlKey ))
               halt_in_debugger = halt_in_debugger ? 0 : 1;
   #endif
   
           if (PE_parse_boot_arg("debug", &boot_arg)) {
                   if (boot_arg & DB_HALT) halt_in_debugger=1;
                   if (boot_arg & DB_PRT) disable_debug_output=FALSE; 
                   if (boot_arg & DB_SLOG) systemLogDiags=TRUE; 
                   if (boot_arg & DB_NMI) panicDebugging=TRUE; 
                   if (boot_arg & DB_LOG_PI_SCRN) logPanicDataToScreen=TRUE; 
           }
   
           if (!PE_parse_boot_arg("nvram_paniclog", &commit_paniclog_to_nvram))
                   commit_paniclog_to_nvram = 1;
   
           /*
            * Entering the debugger will put the CPUs into a "safe"
            * power mode.
            */
           if (PE_parse_boot_arg("pmsafe_debug", &boot_arg))
               pmsafe_debug = boot_arg;
   
   #if NOTYET
           hw_lock_init(&debugger_lock);   /* initialize debugger lock */
   #endif
           hw_lock_init(&pbtlock);         /* initialize print backtrace lock */
   
   #if     MACH_KDB
           /*
            * Initialize KDB
            */
   #if     DB_MACHINE_COMMANDS
           db_machine_commands_install(ppc_db_commands);
   #endif  /* DB_MACHINE_COMMANDS */
           ddb_init();
   
           if (boot_arg & DB_KDB)
                   current_debugger = KDB_CUR_DB;
   
           /*
            * Cause a breakpoint trap to the debugger before proceeding
            * any further if the proper option bit was specified in
            * the boot flags.
            */
           if (halt_in_debugger && (current_debugger == KDB_CUR_DB)) {
                   Debugger("inline call to debugger(machine_startup)");
                   halt_in_debugger = 0;
                   active_debugger =1;
           }
   #endif /* MACH_KDB */
   
           if (PE_parse_boot_arg("preempt", &boot_arg)) {
                   default_preemption_rate = boot_arg;
           }
           if (PE_parse_boot_arg("unsafe", &boot_arg)) {
                   max_unsafe_quanta = boot_arg;
           }
           if (PE_parse_boot_arg("poll", &boot_arg)) {
                   max_poll_quanta = boot_arg;
           }
           if (PE_parse_boot_arg("yield", &boot_arg)) {
                   sched_poll_yield_shift = boot_arg;
           }
           if (PE_parse_boot_arg("idlehalt", &boot_arg)) {
                   idlehalt = boot_arg;
           }
   /* The I/O port to issue a read from, in the event of a panic. Useful for
    * triggering logic analyzers.
    */
           if (PE_parse_boot_arg("panic_io_port", &boot_arg)) {
                   /*I/O ports range from 0 through 0xFFFF */
                   panic_io_port = boot_arg & 0xffff;
           }
   
           machine_conf();
   
   #if NOTYET
           ml_thrm_init();         /* Start thermal monitoring on this processor */
   #endif
   
           /*
            * Start the system.
            */
           kernel_bootstrap();
           /*NOTREACHED*/
   }
   
   
   static void
   machine_conf(void)
   {
           machine_info.memory_size = mem_size;
   }
   
   
   extern void *gPEEFIRuntimeServices;
   extern void *gPEEFISystemTable;
   
   /*-
    *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
    *  code or tables extracted from it, as desired without restriction.
    *
    *  First, the polynomial itself and its table of feedback terms.  The
    *  polynomial is
    *  X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
    *
    *  Note that we take it "backwards" and put the highest-order term in
    *  the lowest-order bit.  The X^32 term is "implied"; the LSB is the
    *  X^31 term, etc.  The X^0 term (usually shown as "+1") results in
    *  the MSB being 1
    *
    *  Note that the usual hardware shift register implementation, which
    *  is what we're using (we're merely optimizing it by doing eight-bit
    *  chunks at a time) shifts bits into the lowest-order term.  In our
    *  implementation, that means shifting towards the right.  Why do we
    *  do it this way?  Because the calculated CRC must be transmitted in
    *  order from highest-order term to lowest-order term.  UARTs transmit
    *  characters in order from LSB to MSB.  By storing the CRC this way
    *  we hand it to the UART in the order low-byte to high-byte; the UART
    *  sends each low-bit to hight-bit; and the result is transmission bit
    *  by bit from highest- to lowest-order term without requiring any bit
    *  shuffling on our part.  Reception works similarly
    *
    *  The feedback terms table consists of 256, 32-bit entries.  Notes
    *
    *      The table can be generated at runtime if desired; code to do so
    *      is shown later.  It might not be obvious, but the feedback
    *      terms simply represent the results of eight shift/xor opera
    *      tions for all combinations of data and CRC register values
    *
    *      The values must be right-shifted by eight bits by the "updcrc
    *      logic; the shift must be unsigned (bring in zeroes).  On some
    *      hardware you could probably optimize the shift in assembler by
    *      using byte-swap instructions
    *      polynomial $edb88320
    *
    *
    * CRC32 code derived from work by Gary S. Brown.
    */
   
   static uint32_t crc32_tab[] = {
           0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
           0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
           0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
           0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
           0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
           0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
           0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
           0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
           0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
           0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
           0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
           0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
           0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
           0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
           0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
           0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
           0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
           0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
           0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
           0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
           0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
           0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
           0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
           0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
           0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
           0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
           0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
           0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
           0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
           0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
           0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
           0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
           0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
           0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
           0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
           0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
           0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
           0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
           0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
           0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
           0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
           0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
           0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
   };
   
   static uint32_t
   crc32(uint32_t crc, const void *buf, size_t size)
   {
           const uint8_t *p;
   
           p = buf;
           crc = crc ^ ~0U;
   
           while (size--)
                   crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
   
           return crc ^ ~0U;
   }
   
   static void
   efi_set_tables_64(EFI_SYSTEM_TABLE_64 * system_table)
   {
       EFI_RUNTIME_SERVICES_64 *runtime;
       uint32_t hdr_cksum;
       uint32_t cksum;
   
       kprintf("Processing 64-bit EFI tables at %p\n", system_table);
       do {
           if (system_table->Hdr.Signature != EFI_SYSTEM_TABLE_SIGNATURE) {
               kprintf("Bad EFI system table signature\n");
               break;
           }
           // Verify signature of the system table
           hdr_cksum = system_table->Hdr.CRC32;
           system_table->Hdr.CRC32 = 0;
           cksum = crc32(0L, system_table, system_table->Hdr.HeaderSize);
   
           //kprintf("System table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
           system_table->Hdr.CRC32 = hdr_cksum;
           if (cksum != hdr_cksum) {
               kprintf("Bad EFI system table checksum\n");
               break;
           }
   
           gPEEFISystemTable     = system_table;
   
           kprintf("RuntimeServices table at 0x%qx\n", system_table->RuntimeServices);
           runtime = (EFI_RUNTIME_SERVICES_64 *) (uintptr_t)system_table->RuntimeServices; // XXX
           kprintf("Checking runtime services table %p\n", runtime);
           if (runtime->Hdr.Signature != EFI_RUNTIME_SERVICES_SIGNATURE) {
               kprintf("Bad EFI runtime table signature\n");
               break;
           }
   
           // Verify signature of runtime services table
           hdr_cksum = runtime->Hdr.CRC32;
           runtime->Hdr.CRC32 = 0;
           cksum = crc32(0L, runtime, runtime->Hdr.HeaderSize);
   
           //kprintf("Runtime table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
           runtime->Hdr.CRC32 = hdr_cksum;
           if (cksum != hdr_cksum) {
               kprintf("Bad EFI runtime table checksum\n");
               break;
           }
   
           gPEEFIRuntimeServices = runtime;
       }
       while (FALSE);
   }
   
   static void
   efi_set_tables_32(EFI_SYSTEM_TABLE * system_table)
   {
       EFI_RUNTIME_SERVICES *runtime;
       uint32_t hdr_cksum;
       uint32_t cksum;
   
       kprintf("Processing 32-bit EFI tables at %p\n", system_table);
       do {
           if (system_table->Hdr.Signature != EFI_SYSTEM_TABLE_SIGNATURE) {
               kprintf("Bad EFI system table signature\n");
               break;
           }
           // Verify signature of the system table
           hdr_cksum = system_table->Hdr.CRC32;
           system_table->Hdr.CRC32 = 0;
           cksum = crc32(0L, system_table, system_table->Hdr.HeaderSize);
   
           //kprintf("System table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
           system_table->Hdr.CRC32 = hdr_cksum;
           if (cksum != hdr_cksum) {
               kprintf("Bad EFI system table checksum\n");
               break;
           }
   
           gPEEFISystemTable     = system_table;
   
           kprintf("RuntimeServices table at %p\n", system_table->RuntimeServices);
           runtime = (EFI_RUNTIME_SERVICES *) system_table->RuntimeServices;
           if (runtime->Hdr.Signature != EFI_RUNTIME_SERVICES_SIGNATURE) {
               kprintf("Bad EFI runtime table signature\n");
               break;
           }
   
           // Verify signature of runtime services table
           hdr_cksum = runtime->Hdr.CRC32;
           runtime->Hdr.CRC32 = 0;
           cksum = crc32(0L, runtime, runtime->Hdr.HeaderSize);
   
           //kprintf("Runtime table calculated CRC32 = 0x%x, header = 0x%x\n", cksum, hdr_cksum);
           runtime->Hdr.CRC32 = hdr_cksum;
           if (cksum != hdr_cksum) {
               kprintf("Bad EFI runtime table checksum\n");
               break;
           }
   
           gPEEFIRuntimeServices = runtime;
       }
       while (FALSE);
   }
   
   
   /* Map in EFI runtime areas. */
   static void
   efi_init(void)
   {
       boot_args *args = (boot_args *)PE_state.bootArgs;
   
       kprintf("Initializing EFI runtime services\n");
   
       do
       {
           vm_offset_t vm_size, vm_addr;
           vm_map_offset_t phys_addr;
           EfiMemoryRange *mptr;
           unsigned int msize, mcount;
           unsigned int i;
   
           msize = args->MemoryMapDescriptorSize;
           mcount = args->MemoryMapSize / msize;
   
           mptr = (EfiMemoryRange *)args->MemoryMap;
           for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) {
               if (((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) ) {
                   vm_size = i386_ptob((uint32_t)mptr->NumberOfPages);
                   vm_addr =   (vm_offset_t) mptr->VirtualStart;
                   phys_addr = (vm_map_offset_t) mptr->PhysicalStart;
                   pmap_map(vm_addr, phys_addr, phys_addr + round_page(vm_size),
                        (mptr->Type == kEfiRuntimeServicesCode) ? VM_PROT_READ | VM_PROT_EXECUTE : VM_PROT_READ|VM_PROT_WRITE,
                        (mptr->Type == EfiMemoryMappedIO)       ? VM_WIMG_IO   : VM_WIMG_USE_DEFAULT);
               }
           }
   
           if (args->Version > 1)
                   panic("Incompatible boot args version %d\n", args->Version);
   
           kprintf("Boot args version %d revision %d mode %d\n", args->Version, args->Revision, args->efiMode);
           if (args->Revision >= 4 && args->efiMode == kBootArgsEfiMode64) {
                   efi_set_tables_64((EFI_SYSTEM_TABLE_64 *) args->efiSystemTable);
           } else {
                   efi_set_tables_32((EFI_SYSTEM_TABLE *) args->efiSystemTable);
           }
       }
       while (FALSE);
   
       return;
   }
   
   /* Remap EFI runtime areas. */
   void
   hibernate_newruntime_map(void * map, vm_size_t map_size, uint32_t system_table_offset)
   {
       boot_args *args = (boot_args *)PE_state.bootArgs;
   
       kprintf("Reinitializing EFI runtime services\n");
   
       if (args->Revision < 3)
           return;
       do
       {
           vm_offset_t vm_size, vm_addr;
           vm_map_offset_t phys_addr;
           EfiMemoryRange *mptr;
           unsigned int msize, mcount;
           unsigned int i;
   
           gPEEFISystemTable     = 0;
           gPEEFIRuntimeServices = 0;
   
           system_table_offset += ptoa_32(args->efiRuntimeServicesPageStart);
   
           kprintf("Old system table 0x%x, new 0x%x\n",
               (uint32_t)args->efiSystemTable,    system_table_offset);
   
           args->efiSystemTable    = system_table_offset;
   
           kprintf("Old map:\n");
           msize = args->MemoryMapDescriptorSize;
           mcount = args->MemoryMapSize / msize;
           mptr = (EfiMemoryRange *)args->MemoryMap;
           for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) {
               if ((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
   
                   vm_size = i386_ptob((uint32_t)mptr->NumberOfPages);
                   vm_addr =   (vm_offset_t) mptr->VirtualStart;
                   phys_addr = (vm_map_offset_t) mptr->PhysicalStart;
   
                   kprintf("mapping[%u] %qx @ %x, %llu\n", mptr->Type, phys_addr, vm_addr, mptr->NumberOfPages);
               }
           }
   
           pmap_remove(kernel_pmap, i386_ptob(args->efiRuntimeServicesPageStart), 
                                    i386_ptob(args->efiRuntimeServicesPageStart + args->efiRuntimeServicesPageCount));
   
           kprintf("New map:\n");
           msize = args->MemoryMapDescriptorSize;
           mcount = map_size / msize;
           mptr = map;
           for (i=0; i < mcount; i++, mptr = (EfiMemoryRange *)(((vm_offset_t)mptr) + msize)) {
               if ((mptr->Attribute & EFI_MEMORY_RUNTIME) == EFI_MEMORY_RUNTIME) {
   
                   vm_size = i386_ptob((uint32_t)mptr->NumberOfPages);
                   vm_addr =   (vm_offset_t) mptr->VirtualStart;
                   phys_addr = (vm_map_offset_t) mptr->PhysicalStart;
   
                   kprintf("mapping[%u] %qx @ %x, %llu\n", mptr->Type, phys_addr, vm_addr, mptr->NumberOfPages);
   
                   pmap_map(vm_addr, phys_addr, phys_addr + round_page(vm_size),
                            (mptr->Type == kEfiRuntimeServicesCode) ? VM_PROT_READ | VM_PROT_EXECUTE : VM_PROT_READ|VM_PROT_WRITE,
                            (mptr->Type == EfiMemoryMappedIO)       ? VM_WIMG_IO   : VM_WIMG_USE_DEFAULT);
               }
           }
   
           if (args->Version > 1)
                   panic("Incompatible boot args version %d\n", args->Version);
   
           kprintf("Boot args version %d revision %d mode %d\n", args->Version, args->Revision, args->efiMode);
           if (args->Revision >= 4 && args->efiMode == kBootArgsEfiMode64) {
                   efi_set_tables_64((EFI_SYSTEM_TABLE_64 *) args->efiSystemTable);
           } else {
                   efi_set_tables_32((EFI_SYSTEM_TABLE *) args->efiSystemTable);
           }
       }
       while (FALSE);
   
       kprintf("Done reinitializing EFI runtime services\n");
   
       return;
   }
   
   /*
    * Find devices.  The system is alive.
    */
   void
   machine_init(void)
   {
           /* Ensure panic buffer is initialized. */
           debug_log_init();
   
           /*
            * Display CPU identification
            */
           cpuid_cpu_display("CPU identification");
           cpuid_feature_display("CPU features");
           cpuid_extfeature_display("CPU extended features");
   
           /*
            * Initialize EFI runtime services.
            */
           efi_init();
   
           smp_init();
   
           /*
            * Set up to use floating point.
            */
           init_fpu();
   
           /*
            * Configure clock devices.
            */
           clock_config();
   
           /*
            * Initialize MTRR from boot processor.
            */
           mtrr_init();
   
           /*
            * Set up PAT for boot processor.
            */
           pat_init();
   
           /*
            * Free lowmem pages
            */
           x86_lowmem_free();
   }
   
   /*
    * Halt a cpu.
    */
   void
   halt_cpu(void)
   {
           halt_all_cpus(FALSE);
   }
   
   int reset_mem_on_reboot = 1;
   
   /*
    * Halt the system or reboot.
    */
   void
   halt_all_cpus(boolean_t reboot)
   {
           if (reboot) {
                   printf("MACH Reboot\n");
                   PEHaltRestart( kPERestartCPU );
           } else {
                   printf("CPU halted\n");
                   PEHaltRestart( kPEHaltCPU );
           }
           while(1);
   }
   
    
   /* Issue an I/O port read if one has been requested - this is an event logic
    * analyzers can use as a trigger point.
    */
   
   void
   panic_io_port_read(void) {
           if (panic_io_port)
                   (void)inb(panic_io_port);
   }
   
   /* For use with the MP rendezvous mechanism
    */
   
   static void
   machine_halt_cpu(__unused void *arg) {
           panic_io_port_read();
           pmCPUHalt(PM_HALT_DEBUG);
   }
   
   void
   Debugger(
           const char      *message)
   {
           unsigned long pi_size = 0;
           void *stackptr;
   
           hw_atomic_add(&debug_mode, 1);   
           if (!panic_is_inited) {
                   postcode(PANIC_HLT);
                   asm("hlt");
           }
   
   
           printf("Debugger called: <%s>\n", message);
           kprintf("Debugger called: <%s>\n", message);
   
           /*
            * Skip the graphical panic box if no panic string.
            * This is the case if we're being called from
            *   host_reboot(,HOST_REBOOT_DEBUGGER)
            * as a quiet way into the debugger.
            */
   
           if (panicstr) {
                   disable_preemption();
   
   /* Issue an I/O port read if one has been requested - this is an event logic
    * analyzers can use as a trigger point.
    */
                   panic_io_port_read();
   
                   /* Obtain current frame pointer */
                   __asm__ volatile("movl %%ebp, %0" : "=m" (stackptr));
   
                   /* Print backtrace - callee is internally synchronized */
                   panic_i386_backtrace(stackptr, 16);
   
                   /* everything should be printed now so copy to NVRAM
                    */
   
                   if( debug_buf_size > 0) {
                     /* Optionally sync the panic log, if any, to NVRAM
                      * This is the default.
                      */
                       if (commit_paniclog_to_nvram) {
                           unsigned int bufpos;
   
                           debug_putc(0);
   
                           /* Now call the compressor */
                           /* XXX Consider using the WKdm compressor in the
                            * future, rather than just packing - would need to
                            * be co-ordinated with crashreporter, which decodes
                            * this post-restart. The compressor should be
                            * capable of in-place compression.
                            */
                           bufpos = packA(debug_buf,
                               (unsigned int) (debug_buf_ptr - debug_buf), debug_buf_size);
                           /* If compression was successful,
                            * use the compressed length
                            */
                           pi_size = bufpos ? bufpos : (unsigned) (debug_buf_ptr - debug_buf);
   
                           /* Save panic log to non-volatile store
                            * Panic info handler must truncate data that is 
                            * too long for this platform.
                            * This call must save data synchronously,
                            * since we can subsequently halt the system.
                            */
                           kprintf("Attempting to commit panic log to NVRAM\n");
                           pi_size = PESavePanicInfo((unsigned char *)debug_buf,
                               pi_size );
   
                           /* Uncompress in-place, to permit examination of
                            * the panic log by debuggers.
                            */
   
                           if (bufpos) {
                             unpackA(debug_buf, bufpos);
                           }
                       }
                   }
                   draw_panic_dialog();
   
                   if (!panicDebugging) {
                           /* Clear the MP rendezvous function lock, in the event
                            * that a panic occurred while in that codepath.
                            */
                           mp_rendezvous_break_lock();
   #if CONFIG_EMBEDDED
                           PEHaltRestart(kPEPanicRestartCPU);
   #else
                           /* Force all CPUs to disable interrupts and HLT.
                            * We've panicked, and shouldn't depend on the
                            * PEHaltRestart() mechanism, which relies on several
                            * bits of infrastructure.
                            */
                           mp_rendezvous_no_intrs(machine_halt_cpu, NULL);
   #endif
                           /* NOT REACHED */
                   }
           }
   
           __asm__("int3");
           hw_atomic_sub(&debug_mode, 1);   
   }
   
   void
   enable_bluebox(void)
   {
   }
   
   void
   disable_bluebox(void)
   {
   }
   
   char *
   machine_boot_info(char *buf, __unused vm_size_t size)
   {
           *buf ='\0';
           return buf;
   }
   
   
   struct pasc {
       unsigned a: 7;
       unsigned b: 7;
       unsigned c: 7;
       unsigned d: 7;
       unsigned e: 7;
       unsigned f: 7;
       unsigned g: 7;
       unsigned h: 7;
   }  __attribute__((packed));
   
   typedef struct pasc pasc_t;
   
   /* Routines for address - symbol translation. Not called unless the "keepsyms"
    * boot-arg is supplied.
    */
   
   static int
   panic_print_macho_symbol_name(struct mach_header *mh, vm_address_t search)
   {
       struct nlist                        *sym = NULL;
       struct load_command         *cmd;
       struct segment_command      *orig_ts = NULL, *orig_le = NULL;
       struct symtab_command       *orig_st = NULL;
       unsigned int                        i;
       char                                        *strings, *bestsym = NULL;
       vm_address_t                        bestaddr = 0, diff, curdiff;
       
       if (mh->magic != MH_MAGIC) {
           /* bad magic number */
           return 0;
       }
       
       cmd = (struct load_command *) &mh[1];
       for (i = 0; i < mh->ncmds; i++) {
           if (cmd->cmd == LC_SEGMENT) {
               struct segment_command *orig_sg = (struct segment_command *) cmd;
               
               if (strncmp(SEG_TEXT, orig_sg->segname,
                                       sizeof(orig_sg->segname)) == 0)
                   orig_ts = orig_sg;
               else if (strncmp(SEG_LINKEDIT, orig_sg->segname,
                                       sizeof(orig_sg->segname)) == 0)
                   orig_le = orig_sg;
               else if (strncmp("", orig_sg->segname,
                                       sizeof(orig_sg->segname)) == 0)
                   orig_ts = orig_sg; /* kexts have a single unnamed segment */
           }
           else if (cmd->cmd == LC_SYMTAB)
               orig_st = (struct symtab_command *) cmd;
           
           cmd = (struct load_command *) ((caddr_t) cmd + cmd->cmdsize);
       }
       
       if ((orig_ts == NULL) || (orig_st == NULL) || (orig_le == NULL))
           return 0;
       
       /* kexts don't have a LINKEDIT segment for now, so we'll never get this far for kexts */
       
       vm_address_t slide = ((vm_address_t)mh) - orig_ts->vmaddr;
       if (slide != 0)
           search -= slide; /* adjusting search since the binary has slid */
       
       if ((search < orig_ts->vmaddr) ||
           (search >= orig_ts->vmaddr + orig_ts->vmsize)) {
           /* search out of range for this mach header */
           return 0;
       }
       
       sym = (struct nlist *)orig_le->vmaddr;
       strings = ((char *)sym) + orig_st->nsyms * sizeof(struct nlist);
       diff = search;
       
       for (i = 0; i < orig_st->nsyms; i++) {
           if (sym[i].n_value <= search) {
               curdiff = search - (vm_address_t)sym[i].n_value;
               if (curdiff < diff) {
                   diff = curdiff;
                   bestaddr = sym[i].n_value;
                   bestsym = strings + sym[i].n_un.n_strx;
               }
           }
       }
       
       if (bestsym != NULL) {
           if (diff != 0) {
               kdb_printf("%s + 0x%08x \n", bestsym, diff);
           } else {
               kdb_printf("%s \n", bestsym);
           }
           return 1;
       }
       return 0;
   }
   
   extern kmod_info_t * kmod; /* the list of modules */
   
   static void
   panic_print_kmod_symbol_name(vm_address_t search)
   {
       kmod_info_t *                       current_kmod = kmod;
       
       while (current_kmod != NULL) {
           if ((current_kmod->address <= search) &&
               (current_kmod->address + current_kmod->size > search))
               break;
           current_kmod = current_kmod->next;
       }
       if (current_kmod != NULL) {
           /* if kexts had symbol table loaded, we'd call search_symbol_name again; alas, they don't */
           kdb_printf("%s + %d \n", current_kmod->name, search - current_kmod->address);
       }
   }
   
   extern struct mach_header _mh_execute_header; /* the kernel's mach header */
   
   static void
   panic_print_symbol_name(vm_address_t search)
   {
       /* try searching in the kernel */
       if (panic_print_macho_symbol_name(&_mh_execute_header, search) == 0) {
           /* that failed, now try to search for the right kext */
           panic_print_kmod_symbol_name(search);
       }
   }
   
   /* Generate a backtrace, given a frame pointer - this routine
    * should walk the stack safely. The trace is appended to the panic log
    * and conditionally, to the console. If the trace contains kernel module
    * addresses, display the module name, load address and dependencies.
    */
   
   #define DUMPFRAMES 32
   #define PBT_TIMEOUT_CYCLES (5 * 1000 * 1000 * 1000ULL)
   void
   panic_i386_backtrace(void *_frame, int nframes)
   {
           cframe_t        *frame = (cframe_t *)_frame;
           vm_offset_t raddrs[DUMPFRAMES];
           int frame_index;
           volatile uint32_t *ppbtcnt = &pbtcnt;
           uint64_t bt_tsc_timeout;
           boolean_t keepsyms = FALSE;
   
           if(pbtcpu != cpu_number()) {
                   hw_atomic_add(&pbtcnt, 1);
                   /* Spin on print backtrace lock, which serializes output
                    * Continue anyway if a timeout occurs.
                    */
                   hw_lock_to(&pbtlock, LockTimeOutTSC);
                   pbtcpu = cpu_number();
           }
   
           PE_parse_boot_arg("keepsyms", &keepsyms);
   
           kdb_printf("Backtrace, "
               "Format - Frame : Return Address (4 potential args on stack) \n");
   
           for (frame_index = 0; frame_index < nframes; frame_index++) {
                   vm_offset_t curframep = (vm_offset_t) frame;
   
                   if (!curframep)
                           break;
   
                   if (curframep & 0x3) {
                           kdb_printf("Unaligned frame\n");
                           goto invalid;
                   }
   
                   if (!kvtophys(curframep) ||
                       !kvtophys(curframep + sizeof(cframe_t))) {
                           kdb_printf("No mapping exists for frame pointer\n");
                           goto invalid;
                   }
   
                   kdb_printf("%p : 0x%x ", frame, frame->caller);
                   if (frame_index < DUMPFRAMES)
                           raddrs[frame_index] = frame->caller;
   
                   if (kvtophys((vm_offset_t)&(frame->args[3])))
                           kdb_printf("(0x%x 0x%x 0x%x 0x%x) \n",
                               frame->args[0], frame->args[1],
                               frame->args[2], frame->args[3]);
   
                   /* Display address-symbol translation only if the "keepsyms"
                    * boot-arg is suppplied, since we unload LINKEDIT otherwise.
                    * This routine is potentially unsafe; also, function
                    * boundary identification is unreliable after a strip -x.
                    */
                   if (keepsyms)
                           panic_print_symbol_name((vm_address_t)frame->caller);
                   
                   /* Stack grows downward */
                   if (frame->prev < frame) {
                           frame = frame->prev;
                          goto invalid;
                  }
                  frame = frame->prev;
          }
  
          if (frame_index >= nframes)
                  kdb_printf("\tBacktrace continues...\n");
  
          goto out;
  
  invalid:
          kdb_printf("Backtrace terminated-invalid frame pointer %p\n",frame);
  out:
  
          /* Identify kernel modules in the backtrace and display their
           * load addresses and dependencies. This routine should walk
           * the kmod list safely.
           */
          if (frame_index)
                  kmod_dump((vm_offset_t *)&raddrs[0], frame_index);
  
          panic_display_system_configuration();
          /* Release print backtrace lock, to permit other callers in the
           * event of panics on multiple processors.
           */
          hw_lock_unlock(&pbtlock);
          hw_atomic_sub(&pbtcnt, 1);
          /* Wait for other processors to complete output
           * Timeout and continue after PBT_TIMEOUT_CYCLES.
           */
          bt_tsc_timeout = rdtsc64() + PBT_TIMEOUT_CYCLES;
          while(*ppbtcnt && (rdtsc64() < bt_tsc_timeout));
  }

Cache object: ec472e1b4d4805342085773798b51f29