osfmk/ppc/ppc_init.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25
  26 #include <debug.h>
  27 #include <mach_kdb.h>
  28 #include <mach_kdp.h>
  29
  30 #include <kern/misc_protos.h>
  31 #include <kern/thread.h>
  32 #include <kern/processor.h>
  33 #include <machine/machine_routines.h>
  34 #include <ppc/boot.h>
  35 #include <ppc/proc_reg.h>
  36 #include <ppc/misc_protos.h>
  37 #include <ppc/pmap.h>
  38 #include <ppc/new_screen.h>
  39 #include <ppc/exception.h>
  40 #include <ppc/Firmware.h>
  41 #include <ppc/savearea.h>
  42 #include <ppc/low_trace.h>
  43 #include <ppc/Diagnostics.h>
  44
  45 #include <pexpert/pexpert.h>
  46
  47 extern const char version[];
  48 extern const char version_variant[];
  49
  50 extern unsigned int intstack_top_ss;    /* declared in start.s */
  51 extern unsigned int debstackptr;        /* declared in start.s */
  52 extern unsigned int debstack_top_ss;    /* declared in start.s */
  53
  54 extern void thandler(void);     /* trap handler */
  55 extern void ihandler(void);     /* interrupt handler */
  56 extern void shandler(void);     /* syscall handler */
  57 extern void chandler(void);     /* system choke */
  58 extern void fpu_switch(void);   /* fp handler */
  59 extern void vec_switch(void);   /* vector handler */
  60 extern void atomic_switch_trap(void);   /* fast path atomic thread switch */
  61
  62 void (*exception_handlers[])(void) = {
  63         thandler,       /* 0x000   INVALID EXCEPTION (T_IN_VAIN) */
  64         thandler,       /* 0x100   System reset (T_RESET) */
  65         thandler,       /* 0x200   Machine check (T_MACHINE_CHECK) */
  66         thandler,       /* 0x300   Data access (T_DATA_ACCESS) */
  67         thandler,       /* 0x400   Instruction access (T_INSTRUCTION_ACCESS) */
  68         ihandler,       /* 0x500   External interrupt (T_INTERRUPT) */
  69         thandler,       /* 0x600   Alignment (T_ALIGNMENT) */
  70         thandler,       /* 0x700   fp exc, ill/priv instr, trap  (T_PROGRAM) */
  71         fpu_switch,     /* 0x800   Floating point disabled (T_FP_UNAVAILABLE) */
  72         ihandler,       /* 0x900   Decrementer (T_DECREMENTER) */
  73         thandler,       /* 0xA00   I/O controller interface (T_IO_ERROR) */
  74         thandler,       /* 0xB00   INVALID EXCEPTION (T_RESERVED) */
  75         shandler,       /* 0xC00   System call exception (T_SYSTEM_CALL) */
  76         thandler,       /* 0xD00   Trace (T_TRACE) */
  77         thandler,       /* 0xE00   FP assist (T_FP_ASSIST) */
  78         thandler,       /* 0xF00   Performance monitor (T_PERF_MON) */
  79         vec_switch,     /* 0xF20   VMX (T_VMX) */
  80         thandler,       /* 0x1000  INVALID EXCEPTION (T_INVALID_EXCP0) */
  81         thandler,       /* 0x1100  INVALID EXCEPTION (T_INVALID_EXCP1) */
  82         thandler,       /* 0x1200  INVALID EXCEPTION (T_INVALID_EXCP2) */
  83         thandler,       /* 0x1300  instruction breakpoint (T_INSTRUCTION_BKPT) */
  84         ihandler,       /* 0x1400  system management (T_SYSTEM_MANAGEMENT) */
  85         thandler,       /* 0x1600  Altivec Assist (T_ALTIVEC_ASSIST) */
  86         ihandler,       /* 0x1700  Thermal interruption (T_THERMAL) */
  87         thandler,       /* 0x1800  INVALID EXCEPTION (T_INVALID_EXCP5) */
  88         thandler,       /* 0x1900  INVALID EXCEPTION (T_INVALID_EXCP6) */
  89         thandler,       /* 0x1A00  INVALID EXCEPTION (T_INVALID_EXCP7) */
  90         thandler,       /* 0x1B00  INVALID EXCEPTION (T_INVALID_EXCP8) */
  91         thandler,       /* 0x1C00  INVALID EXCEPTION (T_INVALID_EXCP9) */
  92         thandler,       /* 0x1D00  INVALID EXCEPTION (T_INVALID_EXCP10) */
  93         thandler,       /* 0x1E00  INVALID EXCEPTION (T_INVALID_EXCP11) */
  94         thandler,       /* 0x1F00  INVALID EXCEPTION (T_INVALID_EXCP12) */
  95         thandler,       /* 0x1F00  INVALID EXCEPTION (T_INVALID_EXCP13) */
  96         thandler,       /* 0x2000  Run Mode/Trace (T_RUNMODE_TRACE) */
  97
  98         ihandler,       /* Software  Signal processor (T_SIGP) */
  99         thandler,       /* Software  Preemption (T_PREEMPT) */
 100         ihandler,       /* Software  INVALID EXCEPTION (T_CSWITCH) */
 101         ihandler,       /* Software  Shutdown Context (T_SHUTDOWN) */
 102         chandler        /* Software  System choke (crash) (T_CHOKE) */
 103 };
 104
 105 int pc_trace_buf[1024] = {0};
 106 int pc_trace_cnt = 1024;
 107
 108 void ppc_init(boot_args *args)
 109 {
 110         int i;
 111         unsigned long *src,*dst;
 112         char *str;
 113         unsigned long   addr, videoAddr;
 114         unsigned int    maxmem;
 115         bat_t               bat;
 116         extern vm_offset_t static_memory_end;
 117
 118         /*
 119          * Setup per_proc info for first cpu.
 120          */
 121
 122         per_proc_info[0].cpu_number = 0;
 123         per_proc_info[0].cpu_flags = 0;
 124         per_proc_info[0].istackptr = 0; /* we're on the interrupt stack */
 125         per_proc_info[0].intstack_top_ss = intstack_top_ss;
 126         per_proc_info[0].debstackptr = debstackptr;
 127         per_proc_info[0].debstack_top_ss = debstack_top_ss;
 128         per_proc_info[0].interrupts_enabled = 0;
 129         per_proc_info[0].active_kloaded = (unsigned int)
 130                 &active_kloaded[0];
 131         per_proc_info[0].cpu_data = (unsigned int)
 132                 &cpu_data[0];
 133         per_proc_info[0].active_stacks = (unsigned int)
 134                 &active_stacks[0];
 135         per_proc_info[0].need_ast = (unsigned int)
 136                 &need_ast[0];
 137         per_proc_info[0].FPU_thread = 0;
 138         per_proc_info[0].FPU_vmmCtx = 0;
 139         per_proc_info[0].VMX_thread = 0;
 140         per_proc_info[0].VMX_vmmCtx = 0;
 141
 142         machine_slot[0].is_cpu = TRUE;
 143
 144         cpu_init();
 145
 146         /*
 147          * Setup some processor related structures to satisfy funnels.
 148          * Must be done before using unparallelized device drivers.
 149          */
 150         processor_ptr[0] = &processor_array[0];
 151         master_cpu = 0;
 152         master_processor = cpu_to_processor(master_cpu);
 153
 154         /* Set up segment registers as VM through space 0 */
 155         for (i=0; i<=15; i++) {
 156           isync();
 157           mtsrin((KERNEL_SEG_REG0_VALUE | (i << 20)), i * 0x10000000);
 158           sync();
 159         }
 160
 161         static_memory_end = round_page(args->topOfKernelData);;
 162         /* Get platform expert set up */
 163         PE_init_platform(FALSE, args);
 164
 165
 166         /* This is how the BATs get configured */
 167         /* IBAT[0] maps Segment 0 1:1 */
 168         /* DBAT[0] maps Segment 0 1:1 */
 169         /* DBAT[2] maps the I/O Segment 1:1 */
 170         /* DBAT[3] maps the Video Segment 1:1 */
 171
 172         /* If v_baseAddr is non zero, use DBAT3 to map the video segment */
 173         videoAddr = args->Video.v_baseAddr & 0xF0000000;
 174         if (videoAddr) {
 175           /* start off specifying 1-1 mapping of video seg */
 176           bat.upper.word             = videoAddr;
 177           bat.lower.word             = videoAddr;
 178
 179           bat.upper.bits.bl    = 0x7ff; /* size = 256M */
 180           bat.upper.bits.vs    = 1;
 181           bat.upper.bits.vp    = 0;
 182
 183           bat.lower.bits.wimg  = PTE_WIMG_IO;
 184           bat.lower.bits.pp    = 2;     /* read/write access */
 185
 186           sync();isync();
 187           mtdbatu(3, BAT_INVALID); /* invalidate old mapping */
 188           mtdbatl(3, bat.lower.word);
 189           mtdbatu(3, bat.upper.word);
 190           sync();isync();
 191         }
 192
 193         /* Use DBAT2 to map the io segment */
 194         addr = get_io_base_addr() & 0xF0000000;
 195         if (addr != videoAddr) {
 196           /* start off specifying 1-1 mapping of io seg */
 197           bat.upper.word             = addr;
 198           bat.lower.word             = addr;
 199
 200           bat.upper.bits.bl    = 0x7ff; /* size = 256M */
 201           bat.upper.bits.vs    = 1;
 202           bat.upper.bits.vp    = 0;
 203
 204           bat.lower.bits.wimg  = PTE_WIMG_IO;
 205           bat.lower.bits.pp    = 2;     /* read/write access */
 206
 207           sync();isync();
 208           mtdbatu(2, BAT_INVALID); /* invalidate old mapping */
 209           mtdbatl(2, bat.lower.word);
 210           mtdbatu(2, bat.upper.word);
 211           sync();isync();
 212         }
 213
 214         if (!PE_parse_boot_arg("diag", &dgWork.dgFlags)) dgWork.dgFlags=0;      /* Set diagnostic flags */
 215         if(dgWork.dgFlags & enaExpTrace) trcWork.traceMask = 0xFFFFFFFF;        /* If tracing requested, enable it */
 216
 217 #if 0
 218         GratefulDebInit((bootBumbleC *)&(args->Video)); /* Initialize the GratefulDeb debugger */
 219 #endif
 220
 221         printf_init();                                          /* Init this in case we need debugger */
 222         panic_init();                                           /* Init this in case we need debugger */
 223
 224         /* setup debugging output if one has been chosen */
 225         PE_init_kprintf(FALSE);
 226         kprintf("kprintf initialized\n");
 227
 228         /* create the console for verbose or pretty mode */
 229         PE_create_console();
 230
 231         /* setup console output */
 232         PE_init_printf(FALSE);
 233
 234         kprintf("version_variant = %s\n", version_variant);
 235         kprintf("version         = %s\n", version);
 236
 237 #if DEBUG
 238         printf("\n\n\nThis program was compiled using gcc %d.%d for powerpc\n",
 239                __GNUC__,__GNUC_MINOR__);
 240
 241         /* Processor version information */
 242         {
 243                 unsigned int pvr;
 244                 __asm__ ("mfpvr %0" : "=r" (pvr));
 245                 printf("processor version register : 0x%08x\n",pvr);
 246         }
 247         for (i = 0; i < kMaxDRAMBanks; i++) {
 248                 if (args->PhysicalDRAM[i].size)
 249                         printf("DRAM at 0x%08x size 0x%08x\n",
 250                                args->PhysicalDRAM[i].base,
 251                                args->PhysicalDRAM[i].size);
 252         }
 253 #endif /* DEBUG */
 254
 255         /*
 256          * VM initialization, after this we're using page tables...
 257          */
 258         if (!PE_parse_boot_arg("maxmem", &maxmem))
 259                 maxmem=0;
 260         else
 261                 maxmem = maxmem * (1024 * 1024);
 262
 263         ppc_vm_init(maxmem, args);
 264
 265         PE_init_platform(TRUE, args);
 266
 267         machine_startup(args);
 268 }
 269
 270 ppc_init_cpu(
 271         struct per_proc_info *proc_info)
 272 {
 273         int i;
 274         unsigned int gph;
 275         savectl *sctl;                                                  /* Savearea controls */
 276
 277         if(proc_info->savedSave) {                              /* Do we have a savearea set up already? */
 278                 mtsprg(1, proc_info->savedSave);        /* Set saved address of savearea */
 279         }
 280         else {
 281                 gph = (unsigned int)save_get_phys();    /* Get a savearea (physical addressing) */
 282                 mtsprg(1, gph);                                         /* Set physical address of savearea */
 283         }
 284
 285         cpu_init();
 286
 287         proc_info->Lastpmap = 0;                                /* Clear last used space */
 288
 289         /* Set up segment registers as VM through space 0 */
 290         for (i=0; i<=15; i++) {
 291           isync();
 292           mtsrin((KERNEL_SEG_REG0_VALUE | (i << 20)), i * 0x10000000);
 293           sync();
 294         }
 295
 296         ppc_vm_cpu_init(proc_info);
 297
 298         ml_thrm_init();                                                 /* Start thermal monitoring on this processor */
 299
 300         slave_main();
 301 }