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
40extern vm_offset_t vm_kernel_stext;
41extern void *version;
42extern void *kmod;
43extern void *kdp_trans_off;
44extern void *osversion;
45extern void *flag_kdp_trigger_reboot;
46extern void *manual_pkt;
47extern struct vm_object pmap_object_store; /* store pt pages */
48
49lowglo 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
81void patch_low_glo(void)
82{
83 lowGlo.lgStext = (uint64_t)vm_kernel_stext;
84}
85
86void patch_low_glo_static_region(uint64_t address, uint64_t size)
87{
88 lowGlo.lgStaticAddr = address;
89 lowGlo.lgStaticSize = size;
90}
91
92
93void 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