xnu-792.6.56.tar.gz

[apple/xnu.git] / osfmk / ppc / ppc_vm_init.c

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_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. 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_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/*
 * @APPLE_FREE_COPYRIGHT@
 */

#include <mach_debug.h>
#include <mach_kdb.h>
#include <mach_kdp.h>
#include <debug.h>

#include <mach/vm_types.h>
#include <mach/vm_param.h>
#include <mach/thread_status.h>
#include <kern/misc_protos.h>
#include <kern/assert.h>
#include <kern/cpu_number.h>
#include <kern/thread.h>

#include <ppc/proc_reg.h>
#include <ppc/Firmware.h>
#include <ppc/boot.h>
#include <ppc/misc_protos.h>
#include <ppc/pmap.h>
#include <ppc/mem.h>
#include <ppc/mappings.h>
#include <ppc/exception.h>
#include <ppc/lowglobals.h>

#include <mach-o/mach_header.h>

extern const char version[];
extern const char version_variant[];

addr64_t hash_table_base;                               /* Hash table base */
unsigned int hash_table_size;                   /* Hash table size */
int         hash_table_shift;           /* "ht_shift" boot arg, used to scale hash_table_size */
vm_offset_t taproot_addr;                               /* (BRINGUP) */
unsigned int taproot_size;                              /* (BRINGUP) */
unsigned int serialmode;                                /* Serial mode keyboard and console control */
extern int disableConsoleOutput;

struct shadowBAT shadow_BAT;



/*
 *      NOTE: mem_size is bogus on large memory machines.  We will pin it to 0x80000000 if there is more than 2 GB
 *      This is left only for compatibility and max_mem should be used.
 */
vm_offset_t mem_size;                                   /* Size of actual physical memory present
                                                                                   minus any performance buffer and possibly limited
                                                                                   by mem_limit in bytes */
uint64_t        mem_actual;                                     /* The "One True" physical memory size 
                                                                                   actually, it's the highest physical address + 1 */
uint64_t        max_mem;                                        /* Size of physical memory (bytes), adjusted by maxmem */
uint64_t        sane_size;                                      /* Memory size to use for defaults calculations */
                                                  

mem_region_t pmap_mem_regions[PMAP_MEM_REGION_MAX + 1];
int      pmap_mem_regions_count = 0;            /* Assume no non-contiguous memory regions */

unsigned int avail_remaining = 0;
vm_offset_t first_avail;
vm_offset_t static_memory_end;
addr64_t vm_last_addr = VM_MAX_KERNEL_ADDRESS;  /* Highest kernel virtual address known to the VM system */

extern struct mach_header _mh_execute_header;
vm_offset_t sectTEXTB;
int sectSizeTEXT;
vm_offset_t sectDATAB;
int sectSizeDATA;
vm_offset_t sectLINKB;
int sectSizeLINK;
vm_offset_t sectKLDB;
int sectSizeKLD;
vm_offset_t sectPRELINKB;
int sectSizePRELINK;
vm_offset_t sectHIBB;
int sectSizeHIB;

vm_offset_t end, etext, edata;

extern unsigned long exception_entry;
extern unsigned long exception_end;


void ppc_vm_init(uint64_t mem_limit, boot_args *args)
{
        unsigned int i, kmapsize, pvr;
        vm_offset_t  addr;
        unsigned int *xtaproot, bank_shift;
        uint64_t        cbsize, xhid0;


/*
 *      Invalidate all shadow BATs
 */

        /* Initialize shadow IBATs */
        shadow_BAT.IBATs[0].upper=BAT_INVALID;
        shadow_BAT.IBATs[0].lower=BAT_INVALID;
        shadow_BAT.IBATs[1].upper=BAT_INVALID;
        shadow_BAT.IBATs[1].lower=BAT_INVALID;
        shadow_BAT.IBATs[2].upper=BAT_INVALID;
        shadow_BAT.IBATs[2].lower=BAT_INVALID;
        shadow_BAT.IBATs[3].upper=BAT_INVALID;
        shadow_BAT.IBATs[3].lower=BAT_INVALID;

        /* Initialize shadow DBATs */
        shadow_BAT.DBATs[0].upper=BAT_INVALID;
        shadow_BAT.DBATs[0].lower=BAT_INVALID;
        shadow_BAT.DBATs[1].upper=BAT_INVALID;
        shadow_BAT.DBATs[1].lower=BAT_INVALID;
        shadow_BAT.DBATs[2].upper=BAT_INVALID;
        shadow_BAT.DBATs[2].lower=BAT_INVALID;
        shadow_BAT.DBATs[3].upper=BAT_INVALID;
        shadow_BAT.DBATs[3].lower=BAT_INVALID;


        /*
         * Go through the list of memory regions passed in via the boot_args
         * and copy valid entries into the pmap_mem_regions table, adding
         * further calculated entries.
         *
         * boot_args version 1 has address instead of page numbers
         * in the PhysicalDRAM banks, set bank_shift accordingly.
         */
        
        bank_shift = 0;
        if (args->Version == kBootArgsVersion1) bank_shift = 12;
        
        pmap_mem_regions_count = 0;
        max_mem = 0;                                                                                                                    /* Will use to total memory found so far */
        mem_actual = 0;                                                                                                                 /* Actual size of memory */
        
        if (mem_limit == 0) mem_limit = 0xFFFFFFFFFFFFFFFFULL;                                  /* If there is no set limit, use all */
        
        for (i = 0; i < kMaxDRAMBanks; i++) {                                                                   /* Look at all of the banks */
                
                cbsize = (uint64_t)args->PhysicalDRAM[i].size << (12 - bank_shift);     /* Remember current size */
                
                if (!cbsize) continue;                                                                                          /* Skip if the bank is empty */
                
                mem_actual = mem_actual + cbsize;                                                                       /* Get true memory size */

                if(mem_limit == 0) continue;                                                                            /* If we hit restriction, just keep counting */

                if (cbsize > mem_limit) cbsize = mem_limit;                                                     /* Trim to max allowed */
                max_mem += cbsize;                                                                                                      /* Total up what we have so far */
                mem_limit = mem_limit - cbsize;                                                                         /* Calculate amount left to do */
                
                pmap_mem_regions[pmap_mem_regions_count].mrStart  = args->PhysicalDRAM[i].base >> bank_shift;   /* Set the start of the bank */
                pmap_mem_regions[pmap_mem_regions_count].mrAStart = pmap_mem_regions[pmap_mem_regions_count].mrStart;           /* Set the start of allocatable area */
                pmap_mem_regions[pmap_mem_regions_count].mrEnd    = ((uint64_t)args->PhysicalDRAM[i].base >> bank_shift) + (cbsize >> 12) - 1;  /* Set the end address of bank */
                pmap_mem_regions[pmap_mem_regions_count].mrAEnd   = pmap_mem_regions[pmap_mem_regions_count].mrEnd;     /* Set the end address of allocatable area */

                /* Regions must be provided in ascending order */
                assert ((pmap_mem_regions_count == 0) ||
                        pmap_mem_regions[pmap_mem_regions_count].mrStart >
                        pmap_mem_regions[pmap_mem_regions_count-1].mrStart);

                pmap_mem_regions_count++;                                                                                       /* Count this region */
        }

        mem_size = (unsigned int)max_mem;                                                                               /* Get size of memory */
        if(max_mem > 0x0000000080000000ULL) mem_size = 0x80000000;                              /* Pin at 2 GB */

        sane_size = max_mem;                                                                                                    /* Calculate a sane value to use for init */
        if(sane_size > (addr64_t)(VM_MAX_KERNEL_ADDRESS + 1)) 
                sane_size = (addr64_t)(VM_MAX_KERNEL_ADDRESS + 1);                                      /* If flush with ram, use addressible portion */


/* 
 * Initialize the pmap system, using space above `first_avail'
 * for the necessary data structures.
 * NOTE : assume that we'll have enough space mapped in already
 */

        first_avail = static_memory_end;

/*
 * Now retrieve addresses for end, edata, and etext 
 * from MACH-O headers for the currently running 32 bit kernel.
 */
        sectTEXTB = (vm_offset_t)getsegdatafromheader(
                &_mh_execute_header, "__TEXT", &sectSizeTEXT);
        sectDATAB = (vm_offset_t)getsegdatafromheader(
                &_mh_execute_header, "__DATA", &sectSizeDATA);
        sectLINKB = (vm_offset_t)getsegdatafromheader(
                &_mh_execute_header, "__LINKEDIT", &sectSizeLINK);
        sectKLDB = (vm_offset_t)getsegdatafromheader(
                &_mh_execute_header, "__KLD", &sectSizeKLD);
        sectHIBB = (vm_offset_t)getsegdatafromheader(
                &_mh_execute_header, "__HIB", &sectSizeHIB);
        sectPRELINKB = (vm_offset_t)getsegdatafromheader(
                &_mh_execute_header, "__PRELINK", &sectSizePRELINK);

        etext = (vm_offset_t) sectTEXTB + sectSizeTEXT;
        edata = (vm_offset_t) sectDATAB + sectSizeDATA;
        end = round_page(getlastaddr());                                        /* Force end to next page */
        
        kmapsize = (round_page(exception_end) - trunc_page(exception_entry)) +  /* Get size we will map later */
                (round_page(sectTEXTB+sectSizeTEXT) - trunc_page(sectTEXTB)) +
                (round_page(sectDATAB+sectSizeDATA) - trunc_page(sectDATAB)) +
                (round_page(sectLINKB+sectSizeLINK) - trunc_page(sectLINKB)) +
                (round_page(sectKLDB+sectSizeKLD) - trunc_page(sectKLDB)) +
                (round_page_32(sectKLDB+sectSizeHIB) - trunc_page_32(sectHIBB)) +
                (round_page(sectPRELINKB+sectSizePRELINK) - trunc_page(sectPRELINKB)) +
                (round_page(static_memory_end) - trunc_page(end));

        pmap_bootstrap(max_mem, &first_avail, kmapsize);

        pmap_map(trunc_page(exception_entry), trunc_page(exception_entry), 
                round_page(exception_end), VM_PROT_READ|VM_PROT_EXECUTE);

        pmap_map(trunc_page(sectTEXTB), trunc_page(sectTEXTB), 
                round_page(sectTEXTB+sectSizeTEXT), VM_PROT_READ|VM_PROT_EXECUTE);

        pmap_map(trunc_page(sectDATAB), trunc_page(sectDATAB), 
                round_page(sectDATAB+sectSizeDATA), VM_PROT_READ|VM_PROT_WRITE);

/* The KLD and LINKEDIT segments are unloaded in toto after boot completes,
* but via ml_static_mfree(), through IODTFreeLoaderInfo(). Hence, we have
* to map both segments page-by-page.
*/
        
        for (addr = trunc_page(sectPRELINKB);
             addr < round_page(sectPRELINKB+sectSizePRELINK);
             addr += PAGE_SIZE) {

            pmap_enter(kernel_pmap, (vm_map_offset_t)addr, (ppnum_t)(addr>>12), 
                        VM_PROT_READ|VM_PROT_WRITE, 
                        VM_WIMG_USE_DEFAULT, TRUE);

        }

        for (addr = trunc_page(sectKLDB);
             addr < round_page(sectKLDB+sectSizeKLD);
             addr += PAGE_SIZE) {

            pmap_enter(kernel_pmap, (vm_map_offset_t)addr, (ppnum_t)(addr>>12), 
                        VM_PROT_READ|VM_PROT_WRITE, 
                        VM_WIMG_USE_DEFAULT, TRUE);

        }

        for (addr = trunc_page(sectLINKB);
             addr < round_page(sectLINKB+sectSizeLINK);
             addr += PAGE_SIZE) {

           pmap_enter(kernel_pmap, (vm_map_offset_t)addr,
                        (ppnum_t)(addr>>12), 
                        VM_PROT_READ|VM_PROT_WRITE, 
                        VM_WIMG_USE_DEFAULT, TRUE);

        }

        for (addr = trunc_page_32(sectHIBB);
             addr < round_page_32(sectHIBB+sectSizeHIB);
             addr += PAGE_SIZE) {

            pmap_enter(kernel_pmap, (vm_map_offset_t)addr, (ppnum_t)(addr>>12), 
                        VM_PROT_READ|VM_PROT_WRITE, 
                        VM_WIMG_USE_DEFAULT, TRUE);

        }

        pmap_enter(kernel_pmap, (vm_map_offset_t)&sharedPage,
                (ppnum_t)&sharedPage >> 12, /* Make sure the sharedPage is mapped */
                VM_PROT_READ|VM_PROT_WRITE, 
                VM_WIMG_USE_DEFAULT, TRUE);

        pmap_enter(kernel_pmap, (vm_map_offset_t)&lowGlo.lgVerCode,
                (ppnum_t)&lowGlo.lgVerCode >> 12,       /* Make sure the low memory globals are mapped */
                VM_PROT_READ|VM_PROT_WRITE, 
                VM_WIMG_USE_DEFAULT, TRUE);
                
/*
 *      We need to map the remainder page-by-page because some of this will
 *      be released later, but not all.  Ergo, no block mapping here 
 */

        for(addr = trunc_page(end); addr < round_page(static_memory_end); addr += PAGE_SIZE) {

                pmap_enter(kernel_pmap, (vm_map_address_t)addr, (ppnum_t)addr>>12, 
                        VM_PROT_READ|VM_PROT_WRITE, 
                        VM_WIMG_USE_DEFAULT, TRUE);

        }
        
/*
 *      Here we map a window into the kernel address space that will be used to
 *  access a slice of a user address space. Clients for this service include
 *  copyin/out and copypv.
 */

        lowGlo.lgUMWvaddr = USER_MEM_WINDOW_VADDR;
                                                                                /* Initialize user memory window base address */
        MapUserMemoryWindowInit();                      /* Go initialize user memory window */

/*
 *      At this point, there is enough mapped memory and all hw mapping structures are
 *      allocated and initialized.  Here is where we turn on translation for the
 *      VERY first time....
 *
 *      NOTE: Here is where our very first interruption will happen.
 *
 */

        hw_start_trans();                                       /* Start translating */
        PE_init_platform(TRUE, args);           /* Initialize this right off the bat */


#if 0
        GratefulDebInit((bootBumbleC *)&(args->Video)); /* Initialize the GratefulDeb debugger */
#endif


        printf_init();                                          /* Init this in case we need debugger */
        panic_init();                                           /* Init this in case we need debugger */
        PE_init_kprintf(TRUE);                          /* Note on PPC we only call this after VM is set up */

        kprintf("kprintf initialized\n");

        serialmode = 0;                                         /* Assume normal keyboard and console */
        if(PE_parse_boot_arg("serial", &serialmode)) {          /* Do we want a serial keyboard and/or console? */
                kprintf("Serial mode specified: %08X\n", serialmode);
        }
        if(serialmode & 1) {                            /* Start serial if requested */
                (void)switch_to_serial_console();       /* Switch into serial mode */
                disableConsoleOutput = FALSE;   /* Allow printfs to happen */
        }
        
        kprintf("max_mem: %ld M\n", (unsigned long)(max_mem >> 20));
        kprintf("version_variant = %s\n", version_variant);
        kprintf("version         = %s\n\n", version);
        __asm__ ("mfpvr %0" : "=r" (pvr));
        kprintf("proc version    = %08x\n", pvr);
        if(getPerProc()->pf.Available & pf64Bit) {      /* 64-bit processor? */
                xhid0 = hid0get64();                    /* Get the hid0 */
                if(xhid0 & (1ULL << (63 - 19))) kprintf("Time base is externally clocked\n");
                else kprintf("Time base is internally clocked\n");
        }


        taproot_size = PE_init_taproot(&taproot_addr);  /* (BRINGUP) See if there is a taproot */
        if(taproot_size) {                                      /* (BRINGUP) */
                kprintf("TapRoot card configured to use vaddr = %08X, size = %08X\n", taproot_addr, taproot_size);
                bcopy_nc((void *)version, (void *)(taproot_addr + 16), strlen(version));        /* (BRINGUP) Pass it our kernel version */
                __asm__ volatile("eieio");              /* (BRINGUP) */
                xtaproot = (unsigned int *)taproot_addr;        /* (BRINGUP) */
                xtaproot[0] = 1;                                /* (BRINGUP) */
                __asm__ volatile("eieio");              /* (BRINGUP) */
        }

        PE_create_console();                            /* create the console for verbose or pretty mode */

        /* setup console output */
        PE_init_printf(FALSE);

#if DEBUG
        printf("\n\n\nThis program was compiled using gcc %d.%d for powerpc\n",
               __GNUC__,__GNUC_MINOR__);


        /* Processor version information */
        {       
                unsigned int pvr;
                __asm__ ("mfpvr %0" : "=r" (pvr));
                printf("processor version register : %08X\n", pvr);
        }

        kprintf("Args at %08X\n", args);
        for (i = 0; i < pmap_mem_regions_count; i++) {
                        printf("DRAM at %08X size %08X\n",
                               args->PhysicalDRAM[i].base,
                               args->PhysicalDRAM[i].size);
        }
#endif /* DEBUG */

#if DEBUG
        kprintf("Mapped memory:\n");
        kprintf("   exception vector: %08X, %08X - %08X\n", trunc_page(exception_entry), 
                trunc_page(exception_entry), round_page(exception_end));
        kprintf("          sectTEXTB: %08X, %08X - %08X\n", trunc_page(sectTEXTB), 
                trunc_page(sectTEXTB), round_page(sectTEXTB+sectSizeTEXT));
        kprintf("          sectDATAB: %08X, %08X - %08X\n", trunc_page(sectDATAB), 
                trunc_page(sectDATAB), round_page(sectDATAB+sectSizeDATA));
        kprintf("          sectLINKB: %08X, %08X - %08X\n", trunc_page(sectLINKB), 
                trunc_page(sectLINKB), round_page(sectLINKB+sectSizeLINK));
        kprintf("           sectKLDB: %08X, %08X - %08X\n", trunc_page(sectKLDB), 
                trunc_page(sectKLDB), round_page(sectKLDB+sectSizeKLD));
        kprintf("               end: %08X, %08X - %08X\n", trunc_page(end), 
                trunc_page(end), static_memory_end);

#endif

        return;
}