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 <arm/lowglobals.h>
32 #include <vm/vm_object.h>
33 #include <vm/vm_page.h>
34
35 extern vm_offset_t vm_kernel_stext;
36 extern void *version;
37 extern void *kmod;
38 extern void *kdp_trans_off;
39 extern void *osversion;
40 extern void *flag_kdp_trigger_reboot;
41 extern void *manual_pkt;
42 extern struct vm_object pmap_object_store; /* store pt pages */
43
44 lowglo lowGlo __attribute__ ((aligned(PAGE_MAX_SIZE))) = {
45 .lgVerCode = { 'O', 'c', 't', 'o', 'p', 'u', 's', ' ' },
46 // Increment the major version for changes that break the current Astris
47 // usage of lowGlo values
48 // Increment the minor version for changes that provide additonal info/function
49 // but does not break current usage
50 .lgLayoutMajorVersion = 3,
51 .lgLayoutMinorVersion = 2,
52 .lgLayoutMagic = LOWGLO_LAYOUT_MAGIC,
53 .lgVersion = (uint32_t)&version,
54 .lgKmodptr = (uint32_t)&kmod,
55 .lgPageShift = PAGE_SHIFT,
56 #if MACH_KDP
57 .lgTransOff = (uint32_t)&kdp_trans_off,
58 #endif
59 .lgOSVersion = (uint32_t)&osversion,
60 #if MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING
61 .lgRebootFlag = (uint32_t)&flag_kdp_trigger_reboot,
62 .lgManualPktAddr = (uint32_t)&manual_pkt,
63 #endif
64 .lgPmapMemQ = (uint32_t)&(pmap_object_store.memq),
65 .lgPmapMemPageOffset = offsetof(struct vm_page_with_ppnum, vmp_phys_page),
66 .lgPmapMemChainOffset = offsetof(struct vm_page, vmp_listq),
67 .lgPmapMemPagesize = (uint32_t)sizeof(struct vm_page),
68 .lgPmapMemStartAddr = -1,
69 .lgPmapMemEndAddr = -1,
70 .lgPmapMemFirstppnum = -1,
71 .lgVmFirstPhys = -1,
72 .lgVmLastPhys = -1
73 };
74
75 void
patch_low_glo(void)76 patch_low_glo(void)
77 {
78 lowGlo.lgStext = (uint32_t)vm_kernel_stext;
79 }
80
81 void
patch_low_glo_static_region(uint32_t address,uint32_t size)82 patch_low_glo_static_region(uint32_t address, uint32_t size)
83 {
84 lowGlo.lgStaticAddr = address;
85 lowGlo.lgStaticSize = size;
86
87 /**
88 * These values are set in pmap_bootstrap() and represent the range of
89 * kernel managed memory.
90 */
91 extern const pmap_paddr_t vm_first_phys;
92 extern const pmap_paddr_t vm_last_phys;
93 assertf((vm_first_phys != 0) && (vm_last_phys != 0),
94 "Tried setting the Low Globals before pmap_bootstrap()");
95 lowGlo.lgVmFirstPhys = vm_first_phys;
96 lowGlo.lgVmLastPhys = vm_last_phys;
97 }
98
99 void
patch_low_glo_vm_page_info(void * start_addr,void * end_addr,uint32_t first_ppnum)100 patch_low_glo_vm_page_info(void * start_addr, void * end_addr, uint32_t first_ppnum)
101 {
102 lowGlo.lgPmapMemStartAddr = (uint32_t)start_addr;
103 lowGlo.lgPmapMemEndAddr = (uint32_t)end_addr;
104 lowGlo.lgPmapMemFirstppnum = first_ppnum;
105 }
106