projects / apple / xnu.git / blame
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|---|---|---|
| 316670eb A |
1 | /* |
| 2 | * Copyright (c) 2011 Apple Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 0a7de745 | 5 | * |
| 316670eb A |
6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 0a7de745 | 14 | * |
| 316670eb A |
15 | * Please obtain a copy of the License at |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 0a7de745 | 17 | * |
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18 | * The Original Code and all software distributed under the License are |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 0a7de745 | 25 | * |
| 316670eb A |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 27 | */ | |
| 28 | #include <i386/pmap.h> | |
| 29 | ||
| 30 | /* | |
| 31 | * These pagetables are used during early processor startup during | |
| 32 | * the transition from protected mode to 64-bit mode and the jump | |
| 33 | * to high kernel address space. | |
| 34 | * | |
| 35 | * They are required to be at the base of the kernel and specifically | |
| 36 | * the base of the special __HIB section. | |
| 37 | * | |
| 38 | * These tables are statically-defined as physical-zero-based. | |
| 39 | * Startup code in start.s rebases these according to the actual physical | |
| 0a7de745 | 40 | * base address. |
| 316670eb A |
41 | */ |
| 42 | ||
| 43 | /* | |
| 44 | * NB: This must be located at the kernel's base address! | |
| 45 | */ | |
| 46 | #define PML4_PROT (INTEL_PTE_VALID | INTEL_PTE_WRITE) | |
| 0a7de745 A |
47 | pml4_entry_t BootPML4[PTE_PER_PAGE] |
| 48 | __attribute__((section("__HIB, __bootPT"))) = { | |
| 49 | [0] = ((uint64_t)(PAGE_SIZE) | PML4_PROT), | |
| 50 | [KERNEL_PML4_INDEX] = ((uint64_t)(PAGE_SIZE) | PML4_PROT), | |
| 316670eb A |
51 | }; |
| 52 | ||
| 53 | #define PDPT_PROT (INTEL_PTE_VALID | INTEL_PTE_WRITE) | |
| 0a7de745 A |
54 | pdpt_entry_t BootPDPT[PTE_PER_PAGE] |
| 55 | __attribute__((section("__HIB, __bootPT"))) = { | |
| 56 | [0] = ((uint64_t)(2 * PAGE_SIZE) | PDPT_PROT), | |
| 57 | [1] = ((uint64_t)(3 * PAGE_SIZE) | PDPT_PROT), | |
| 58 | [2] = ((uint64_t)(4 * PAGE_SIZE) | PDPT_PROT), | |
| 59 | [3] = ((uint64_t)(5 * PAGE_SIZE) | PDPT_PROT), | |
| 316670eb A |
60 | }; |
| 61 | ||
| 62 | #if NPGPTD != 4 | |
| 63 | #error Please update boot_pt.c to reflect the new value of NPGPTD | |
| 64 | #endif | |
| 65 | ||
| 66 | #if MACHINE_BOOTSTRAPPTD | |
| 67 | ||
| 68 | #define PDT_PROT (INTEL_PTE_PS | INTEL_PTE_VALID | INTEL_PTE_WRITE) | |
| 0a7de745 | 69 | #define ID_MAP_2MEG(x) [(x)] = ((((uint64_t)(x)) << 21) | (PDT_PROT)), |
| 316670eb | 70 | |
| 0a7de745 A |
71 | #define L0(x, n) x(n) |
| 72 | #define L1(x, n) L0(x,n-1) L0(x,n) | |
| 73 | #define L2(x, n) L1(x,n-2) L1(x,n) | |
| 74 | #define L3(x, n) L2(x,n-4) L2(x,n) | |
| 75 | #define L4(x, n) L3(x,n-8) L3(x,n) | |
| 76 | #define L5(x, n) L4(x,n-16) L4(x,n) | |
| 77 | #define L6(x, n) L5(x,n-32) L5(x,n) | |
| 78 | #define L7(x, n) L6(x,n-64) L6(x,n) | |
| 79 | #define L8(x, n) L7(x,n-128) L7(x,n) | |
| 80 | #define L9(x, n) L8(x,n-256) L8(x,n) | |
| 81 | #define L10(x, n) L9(x,n-512) L9(x,n) | |
| 82 | #define L11(x, n) L10(x,n-1024) L10(x,n) | |
| 316670eb A |
83 | |
| 84 | #define FOR_0_TO_2047(x) L11(x,2047) | |
| 85 | ||
| 0a7de745 A |
86 | pd_entry_t BootPTD[2048] |
| 87 | __attribute__((section("__HIB, __bootPT"))) = { | |
| 316670eb A |
88 | FOR_0_TO_2047(ID_MAP_2MEG) |
| 89 | }; | |
| 90 | #endif /* MACHINE_BOOTSTRAPPTD */ |