+++ /dev/null
-/*
- * Copyright (c) 2000 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@
- */
-
-
-#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 <ppc/proc_reg.h>
-#include <ppc/boot.h>
-#include <ppc/misc_protos.h>
-#include <ppc/pmap.h>
-#include <ppc/pmap_internals.h>
-#include <ppc/mem.h>
-#include <ppc/exception.h>
-#include <ppc/gdb_defs.h>
-#include <ppc/POWERMAC/video_board.h>
-#include <ppc/POWERMAC/video_pdm.h>
-
-#ifdef __MACHO__
-#include <libkern/kernel_mach_header.h>
-#endif
-
-/* External references */
-
-extern unsigned int intstack[]; /* declared in start.s */
-extern unsigned int intstack_top_ss; /* declared in start.s */
-#if MACH_KGDB
-extern unsigned int gdbstackptr; /* declared in start.s */
-extern unsigned int gdbstack_top_ss; /* declared in start.s */
-#endif /* MACH_KGDB */
-
-/* Stuff declared in kern/bootstrap.c which we may need to initialise */
-
-extern vm_offset_t boot_start;
-extern vm_size_t boot_size;
-extern vm_offset_t boot_region_desc;
-extern vm_size_t boot_region_count;
-extern int boot_thread_state_flavor;
-extern thread_state_t boot_thread_state;
-extern unsigned int boot_thread_state_count;
-
-/* Trap handling function prototypes */
-
-extern void thandler(void); /* trap handler */
-extern void ihandler(void); /* interrupt handler */
-extern void shandler(void); /* syscall handler */
-extern void gdbhandler(void); /* debugger handler */
-extern void fpu_switch(void); /* fp handler */
-extern void atomic_switch_trap(void); /* fast path atomic thread switch */
-
-/* definitions */
-
-struct ppc_thread_state boot_task_thread_state;
-
-
-
-
-
-#if 1 /* TODO NMGS - vm_map_steal_memory shouldn't use these - remove */
-vm_offset_t avail_start;
-vm_offset_t avail_end;
-#endif
-unsigned int avail_remaining = 0;
-vm_offset_t first_avail;
-
-/*
- * Mach-O Support
- */
-
-
-#ifdef __MACHO__
-void *sectTEXTB;
-unsigned long sectSizeTEXT;
-void *sectDATAB;
-unsigned long sectSizeDATA;
-void *sectOBJCB;
-unsigned long sectSizeOBJC;
-void *sectLINKB;
-unsigned long sectSizeLINK;
-
-vm_offset_t end, etext, edata;
-#define ETEXT etext
-#endif
-
-
-
-void ppc_vm_init(unsigned int memory_size, boot_args *args)
-{
- unsigned int htabmask;
- unsigned int i;
- vm_offset_t addr;
- int boot_task_end_offset;
-
- printf("mem_size = %d M\n",memory_size / (1024 * 1024));
-
-#ifdef __MACHO__
- /* Now retrieve addresses for end, edata, and etext
- * from MACH-O headers.
- */
-
-
- etext = (vm_offset_t) sectTEXTB + sectSizeTEXT;
- edata = (vm_offset_t) sectDATAB + sectSizeDATA;
- end = getlastaddr();
-#endif
-
- /* Stitch valid memory regions together - they may be contiguous
- * even though they're not already glued together
- */
-
- /* Go through the list of memory regions passed in via the args
- * and copy valid entries into the pmap_mem_regions table, adding
- * further calculated entries.
- */
-
-
- /* Initialise the pmap system, using space above `first_avail'*/
-
-#ifndef __MACHO__
- free_regions[free_regions_count].start =
- round_page((unsigned int)&_ExceptionVectorsEnd -
- (unsigned int)&_ExceptionVectorsStart);
-#else
- /* On MACH-O generated kernels, the Exception Vectors
- * are already mapped and loaded at 0 -- no relocation
- * or freeing of memory is needed
- */
-
- free_regions[free_regions_count].start = round_page((unsigned int)&_ExceptionVectorsEnd) + 4096;
-#endif
-
- /* If we are on a PDM machine memory at 1M might be used
- * for video. TODO NMGS call video driver to do this
- * somehow
- */
-
-
- /* For PowerMac, first_avail is set to above the bootstrap task.
- * TODO NMGS - different screen modes - might free mem?
- */
-
- first_avail = round_page(args->first_avail);
-
-
- /* map in the exception vectors */
- /*
- * map the kernel text, data and bss. Don't forget other regions too
- */
- for (i = 0; i < args->kern_info.region_count; i++) {
-#if MACH_KDB
- if (args->kern_info.regions[i].prot == VM_PROT_NONE &&
- i == args->kern_info.region_count - 1) {
- /* assume that's the kernel symbol table */
- kern_sym_start = args->kern_info.regions[i].addr;
- kern_sym_size = args->kern_info.regions[i].size;
- printf("kernel symbol table at 0x%x size 0x%x\n",
- kern_sym_start, kern_sym_size);
- args->kern_info.regions[i].prot |=
- (VM_PROT_WRITE|VM_PROT_READ);
- }
-#endif /* MACH_KDB */
-
-#ifdef __MACHO__
- /* Skip the VECTORS segment */
- if (args->kern_info.regions[i].addr == 0)
- continue;
-#endif
-
- boot_region_count = args->task_info.region_count;
- boot_size = 0;
- boot_task_end_offset = 0;
- /* Map bootstrap task pages 1-1 so that user_bootstrap can find it */
- for (i = 0; i < boot_region_count; i++) {
- if (args->task_info.regions[i].mapped) {
- /* kernel requires everything page aligned */
-#if DEBUG
- printf("mapping virt 0x%08x to phys 0x%08x end 0x%x, prot=0x%b\n",
- ppc_trunc_page(args->task_info.base_addr +
- args->task_info.regions[i].offset),
- ppc_trunc_page(args->task_info.base_addr +
- args->task_info.regions[i].offset),
- ppc_round_page(args->task_info.base_addr +
- args->task_info.regions[i].offset +
- args->task_info.regions[i].size),
- args->task_info.regions[i].prot,
- "\x10\1READ\2WRITE\3EXEC");
-#endif /* DEBUG */
-
- (void)pmap_map(
- ppc_trunc_page(args->task_info.base_addr +
- args->task_info.regions[i].offset),
- ppc_trunc_page(args->task_info.base_addr +
- args->task_info.regions[i].offset),
- ppc_round_page(args->task_info.base_addr +
- args->task_info.regions[i].offset +
- args->task_info.regions[i].size),
- args->task_info.regions[i].prot);
-
- /* Count the size of mapped space */
- boot_size += args->task_info.regions[i].size;
-
- /* There may be an overlapping physical page
- * mapped to two different virtual addresses
- */
- if (boot_task_end_offset >
- args->task_info.regions[i].offset) {
- boot_size -= boot_task_end_offset -
- args->task_info.regions[i].offset;
-#if DEBUG
- printf("WARNING - bootstrap overlaps regions\n");
-#endif /* DEBUG */
- }
-
- boot_task_end_offset =
- args->task_info.regions[i].offset +
- args->task_info.regions[i].size;
- }
- }
-
- if (boot_region_count) {
-
- /* Add a new region to the bootstrap task for it's stack */
- args->task_info.regions[boot_region_count].addr =
- BOOT_STACK_BASE;
- args->task_info.regions[boot_region_count].size =
- BOOT_STACK_SIZE;
- args->task_info.regions[boot_region_count].mapped = FALSE;
- boot_region_count++;
-
- boot_start = args->task_info.base_addr;
- boot_region_desc = (vm_offset_t) args->task_info.regions;
- /* TODO NMGS need to put param info onto top of boot stack */
- boot_task_thread_state.r1 = BOOT_STACK_PTR-0x100;
- boot_task_thread_state.srr0 = args->task_info.entry;
- boot_task_thread_state.srr1 =
- MSR_MARK_SYSCALL(MSR_EXPORT_MASK_SET);
-
- boot_thread_state_flavor = PPC_THREAD_STATE;
- boot_thread_state_count = PPC_THREAD_STATE_COUNT;
- boot_thread_state =
- (thread_state_t)&boot_task_thread_state;
- }
-
-
-
-}
-
projects / apple / xnu.git / blobdiff