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 | extern vm_offset_t c_buffers; |
49 | extern vm_size_t c_buffers_size; |
50 | |
51 | lowglo lowGlo __attribute__ ((aligned(PAGE_MAX_SIZE))) = { |
52 | // Increment the major version for changes that break the current Astris |
53 | // usage of lowGlo values |
54 | // Increment the minor version for changes that provide additonal info/function |
55 | // but does not break current usage |
56 | .lgLayoutMajorVersion = 3, |
57 | .lgLayoutMinorVersion = 3, |
58 | .lgLayoutMagic = LOWGLO_LAYOUT_MAGIC, |
59 | .lgVerCode = { 'K', 'r', 'a', 'k', 'e', 'n', ' ', ' ' }, |
60 | .lgZero = 0, |
61 | .lgStext = 0, // To be filled in below |
62 | .lgVersion = (uint64_t) &version, |
63 | .lgOSVersion = (uint64_t) &osversion, |
64 | .lgKmodptr = (uint64_t) &kmod, |
65 | #if MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING |
66 | .lgTransOff = (uint64_t) &kdp_trans_off, |
67 | .lgRebootFlag = (uint64_t) &flag_kdp_trigger_reboot, |
68 | .lgManualPktAddr = (uint64_t) &manual_pkt, |
69 | #endif |
70 | .lgPmapMemQ = (uint64_t)&(pmap_object_store.memq), |
71 | .lgPmapMemPageOffset = offsetof(struct vm_page_with_ppnum, vmp_phys_page), |
72 | .lgPmapMemChainOffset = offsetof(struct vm_page, vmp_listq), |
73 | .lgPmapMemPagesize = (uint64_t)sizeof(struct vm_page), |
74 | .lgPmapMemFromArrayMask = VM_PAGE_PACKED_FROM_ARRAY, |
75 | .lgPmapMemPackedShift = VM_PAGE_PACKED_PTR_SHIFT, |
76 | .lgPmapMemPackedBaseAddr = VM_PAGE_PACKED_PTR_BASE, |
77 | .lgPmapMemStartAddr = -1, |
78 | .lgPmapMemEndAddr = -1, |
79 | .lgPmapMemFirstppnum = -1, |
80 | .lgPageShift = ARM_PGSHIFT, |
81 | .lgVmFirstPhys = -1, |
82 | .lgVmLastPhys = -1, |
83 | .lgPhysMapBase = -1, |
84 | .lgPhysMapEnd = -1, |
85 | .lgPmapIoRangePtr = -1, |
86 | .lgNumPmapIoRanges = -1, |
87 | .lgCompressorBufferAddr = (uint64_t) &c_buffers, // added in 3.3 |
88 | .lgCompressorSizeAddr = (uint64_t) &c_buffers_size // added in 3.3 |
89 | }; |
90 | |
91 | void |
92 | patch_low_glo(void) |
93 | { |
94 | lowGlo.lgStext = (uint64_t)vm_kernel_stext; |
95 | } |
96 | |
97 | void |
98 | patch_low_glo_static_region(uint64_t address, uint64_t size) |
99 | { |
100 | lowGlo.lgStaticAddr = address; |
101 | lowGlo.lgStaticSize = size; |
102 | |
103 | /** |
104 | * These values are set in pmap_bootstrap() and represent the range of |
105 | * kernel managed memory. |
106 | */ |
107 | extern const pmap_paddr_t vm_first_phys; |
108 | extern const pmap_paddr_t vm_last_phys; |
109 | assertf((vm_first_phys != 0) && (vm_last_phys != 0), |
110 | "Tried setting the Low Globals before pmap_bootstrap()" ); |
111 | lowGlo.lgVmFirstPhys = vm_first_phys; |
112 | lowGlo.lgVmLastPhys = vm_last_phys; |
113 | |
114 | /** |
115 | * These values are set in pmap_bootstrap() and represent an array of all |
116 | * kernel-managed I/O regions (pmap-io-ranges in the device tree). Some of |
117 | * these regions may include DRAM carved out for usage by other agents on |
118 | * the system. |
119 | * |
120 | * Need to forward-declare pmap_io_range_t since that only exists in the |
121 | * PMAP code. |
122 | */ |
123 | typedef struct pmap_io_range pmap_io_range_t; |
124 | extern const pmap_io_range_t* io_attr_table; |
125 | extern const unsigned int num_io_rgns; |
126 | lowGlo.lgPmapIoRangePtr = (uint64_t)io_attr_table; |
127 | lowGlo.lgNumPmapIoRanges = (uint64_t)num_io_rgns; |
128 | |
129 | /** |
130 | * These values are set in arm_vm_init() and represent the virtual address |
131 | * space used by the physical aperture. |
132 | */ |
133 | extern const vm_map_address_t physmap_base; |
134 | extern const vm_map_address_t physmap_end; |
135 | assertf((physmap_base != 0) && (physmap_end != 0), |
136 | "Tried setting the Low Globals before arm_vm_init()" ); |
137 | lowGlo.lgPhysMapBase = physmap_base; |
138 | lowGlo.lgPhysMapEnd = physmap_end; |
139 | } |
140 | |
141 | void |
142 | patch_low_glo_vm_page_info(void * start_addr, void * end_addr, uint32_t first_ppnum) |
143 | { |
144 | lowGlo.lgPmapMemStartAddr = (uint64_t)start_addr; |
145 | lowGlo.lgPmapMemEndAddr = (uint64_t)end_addr; |
146 | lowGlo.lgPmapMemFirstppnum = first_ppnum; |
147 | lowGlo.lgPageShift = PAGE_SHIFT; |
148 | } |
149 | |