1 | /* |
2 | * Copyright (c) 2012-2013 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
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. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
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. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | |
29 | #include <mach_kdp.h> |
30 | #include <mach/vm_param.h> |
31 | #include <arm64/lowglobals.h> |
32 | #include <vm/vm_object.h> |
33 | #include <vm/vm_page.h> |
34 | |
35 | /* |
36 | * On arm64, the low globals get mapped low via machine_init() during kernel |
37 | * bootstrap. |
38 | */ |
39 | |
40 | extern vm_offset_t vm_kernel_stext; |
41 | extern void *version; |
42 | extern void *kmod; |
43 | extern void *kdp_trans_off; |
44 | extern void *osversion; |
45 | extern void *flag_kdp_trigger_reboot; |
46 | extern void *manual_pkt; |
47 | extern struct vm_object pmap_object_store; /* store pt pages */ |
48 | |
49 | lowglo lowGlo __attribute__ ((aligned(PAGE_MAX_SIZE))) = { |
50 | // Increment the major version for changes that break the current Astris |
51 | // usage of lowGlo values |
52 | // Increment the minor version for changes that provide additonal info/function |
53 | // but does not break current usage |
54 | .lgLayoutMajorVersion = 3, |
55 | .lgLayoutMinorVersion = 0, |
56 | .lgLayoutMagic = LOWGLO_LAYOUT_MAGIC, |
57 | .lgVerCode = { 'K','r','a','k','e','n',' ',' ' }, |
58 | .lgZero = 0, |
59 | .lgStext = 0, // To be filled in below |
60 | .lgVersion = (uint64_t) &version, |
61 | .lgOSVersion = (uint64_t) &osversion, |
62 | .lgKmodptr = (uint64_t) &kmod, |
63 | #if MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING |
64 | .lgTransOff = (uint64_t) &kdp_trans_off, |
65 | .lgRebootFlag = (uint64_t) &flag_kdp_trigger_reboot, |
66 | .lgManualPktAddr = (uint64_t) &manual_pkt, |
67 | #endif |
68 | .lgPmapMemQ = (uint64_t)&(pmap_object_store.memq), |
69 | .lgPmapMemPageOffset = offsetof(struct vm_page_with_ppnum, vmp_phys_page), |
70 | .lgPmapMemChainOffset = offsetof(struct vm_page, vmp_listq), |
71 | .lgPmapMemPagesize = (uint64_t)sizeof(struct vm_page), |
72 | .lgPmapMemFromArrayMask = VM_PACKED_FROM_VM_PAGES_ARRAY, |
73 | .lgPmapMemPackedShift = VM_PACKED_POINTER_SHIFT, |
74 | .lgPmapMemPackedBaseAddr = VM_MIN_KERNEL_AND_KEXT_ADDRESS, |
75 | .lgPmapMemStartAddr = -1, |
76 | .lgPmapMemEndAddr = -1, |
77 | .lgPmapMemFirstppnum = -1, |
78 | .lgPageShift = ARM_PGSHIFT |
79 | }; |
80 | |
81 | void patch_low_glo(void) |
82 | { |
83 | lowGlo.lgStext = (uint64_t)vm_kernel_stext; |
84 | } |
85 | |
86 | void patch_low_glo_static_region(uint64_t address, uint64_t size) |
87 | { |
88 | lowGlo.lgStaticAddr = address; |
89 | lowGlo.lgStaticSize = size; |
90 | } |
91 | |
92 | |
93 | void patch_low_glo_vm_page_info(void * start_addr, void * end_addr, uint32_t first_ppnum) |
94 | { |
95 | lowGlo.lgPmapMemStartAddr = (uint64_t)start_addr; |
96 | lowGlo.lgPmapMemEndAddr = (uint64_t)end_addr; |
97 | lowGlo.lgPmapMemFirstppnum = first_ppnum; |
98 | lowGlo.lgPageShift = PAGE_SHIFT; |
99 | } |
100 | |