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Root/tags/2.3/i386/boot2/resume.c

Source at commit 2862 created 7 years 25 days ago.
By ifabio, Tag 2.3 release, bump svn to 2.4
1/*␊
2 * resume.c␊
3 * ␊
4 *␊
5 * Created by mackerintel on 1/22/09.␊
6 * Copyright 2009 mackerintel. All rights reserved.␊
7 *␊
8 */␊
9␊
10#include "saio_internal.h"␊
11#include "libsa.h"␊
12#include "IOHibernatePrivate.h"␊
13#include "memory.h"␊
14#include "bootstruct.h"␊
15#include "boot.h"␊
16#include "pci.h"␊
17␊
18extern int previewTotalSectors;␊
19extern int previewLoadedSectors;␊
20extern uint8_t *previewSaveunder;␊
21␊
22static unsigned long␊
23getmemorylimit(void)␊
24{␊
25␉int line;␊
26␉int i;␊
27␉MemoryRange *mp = bootInfo->memoryMap;␊
28 ␊
29␉// Activate and clear page 1␊
30␉line = 1;␊
31␉for (i = 0; i < bootInfo->memoryMapCount; i++) {␊
32␉␉if((mp->type == 1) && ((unsigned long)mp->base == 0x100000)) {␊
33␉␉␉return (unsigned long)(mp->base + mp->length);␊
34␉␉}␊
35␉␉mp++;␊
36␉}␊
37␉return 0x10000000;␊
38}␊
39␊
40static void WakeKernel(IOHibernateImageHeader * header)␊
41{␊
42␉uint32_t proc;␊
43␉unsigned long cnt, newSP;␊
44␉unsigned long *src, *dst;␊
45␉unsigned int ␉count;␊
46␉unsigned int ␉page;␊
47␉unsigned int ␉compressedSize;␊
48␉int32_t ␉byteCnt;␊
49␉u_int32_t ␉lowHalf, highHalf;␊
50␉u_int32_t ␉sum;␊
51␊
52␉printf("\nWake Kernel!\n");␊
53␊
54␉dst = (unsigned long *) (header->restore1CodePhysPage << 12);␊
55␉count = header->restore1PageCount;␊
56␉proc = (header->restore1CodeOffset + ((uint32_t) dst));␊
57␊
58␉newSP = header->restore1StackOffset + (header->restore1CodePhysPage << 12);␊
59␊
60␉src = (unsigned long *) (((u_int32_t) &header->fileExtentMap[0]) ␊
61␉␉␉␉␉␉␉ + header->fileExtentMapSize);␊
62␉sum = 0;␊
63␊
64␉for (page = 0; page < count; page++)␊
65␉{␊
66␉␉compressedSize = 4096;␊
67␊
68␉␉lowHalf = 1;␊
69␉␉highHalf = 0;␊
70␊
71␉␉for (cnt = 0; cnt < compressedSize; cnt += 0x20) {␊
72␉␉␉dst[0] = src[0];␊
73␉␉␉dst[1] = src[1];␊
74␉␉␉dst[2] = src[2];␊
75␉␉␉dst[3] = src[3];␊
76␉␉␉dst[4] = src[4];␊
77␉␉␉dst[5] = src[5];␊
78␉␉␉dst[6] = src[6];␊
79␉␉␉dst[7] = src[7];␊
80␉␉␉for (byteCnt = 0; byteCnt < 0x20; byteCnt++) {␊
81␉␉␉␉lowHalf += ((u_int8_t *) dst)[byteCnt];␊
82␉␉␉␉highHalf += lowHalf;␊
83␉␉␉}␊
84␉␉␉src += 8;␊
85␉␉␉dst += 8;␊
86␉␉}␊
87␊
88␉␉lowHalf %= 65521L;␊
89␉␉highHalf %= 65521L;␊
90␉␉sum += (highHalf << 16) | lowHalf;␊
91␉}␊
92␉header->actualRestore1Sum = sum;␊
93␉startprog (proc, header);␊
94␊
95␉return;␊
96}␊
97␊
98void HibernateBoot(char *image_filename)␊
99{␊
100␉long long size, imageSize, codeSize, allocSize;␊
101␉long mem_base;␊
102␉IOHibernateImageHeader _header;␊
103␉IOHibernateImageHeader * header = &_header;␊
104␉long buffer;␊
105␊
106␉size = ReadFileAtOffset (image_filename, header, 0, sizeof(IOHibernateImageHeader));␊
107␉printf("header read size %x\n", size);␊
108␊
109␉imageSize = header->image1Size;␊
110␉codeSize = header->restore1PageCount << 12;␊
111␉if (kIOHibernateHeaderSignature != header->signature) {␊
112␉␉printf ("Incorrect image signature\n");␊
113␉␉return;␊
114␉}␊
115␉if (header->encryptStart) {␊
116␉␉printf ("Resuming from Encrypted image is unsupported.\n"␊
117␉␉␉␉"Uncheck \"Use secure virtual memory\" in \"Security\" pane on system preferences.\n"␊
118␉␉␉␉"Press any key to proceed with normal boot.\n");␊
119␉␉getchar();␊
120␉␉return;␊
121␉}␊
122// depends on NVRAM␊
123#if 0␊
124␉{␊
125␉␉uint32_t machineSignature;␊
126␉␉size = GetProp(gChosenPH, kIOHibernateMachineSignatureKey,␊
127␉␉␉␉␉ (char *)&machineSignature, sizeof(machineSignature));␊
128␉␉if (size != sizeof(machineSignature)) {␊
129␉␉␉machineSignature = 0;␊
130␉␉}␊
131␉␉if (machineSignature != header->machineSignature) {␊
132␉␉␉break;␊
133␉␉}␊
134␉}␊
135#endif␊
136␊
137␉allocSize = imageSize + ((4095 + sizeof(hibernate_graphics_t)) & ~4095);␊
138␊
139␉mem_base = getmemorylimit() - allocSize;//TODO: lower this␊
140␊
141␉printf("mem_base %x\n", mem_base);␊
142␉if (((long long)mem_base + allocSize) < (1024 * bootInfo->extmem + 0x100000)) {␊
143␉␉printf ("Not enough space to restore image. Press any key to proceed with normal boot.\n");␊
144␉␉getchar();␊
145␉␉return;␊
146␉}␊
147␊
148␉bcopy(header, (void *) mem_base, sizeof(IOHibernateImageHeader));␊
149␉header = (IOHibernateImageHeader *) mem_base;␊
150␊
151␉imageSize -= sizeof(IOHibernateImageHeader);␊
152␉buffer = (long)(header + 1);␊
153␉␊
154␉if (header->previewSize) {␊
155␉␉uint64_t preview_offset = header->fileExtentMapSize - sizeof(header->fileExtentMap) + codeSize;␊
156␉␉uint8_t progressSaveUnder[kIOHibernateProgressCount][kIOHibernateProgressSaveUnderSize];␊
157␊
158␉␉ReadFileAtOffset (image_filename, (char *)buffer, sizeof(IOHibernateImageHeader), preview_offset+header->previewSize);␊
159␉␉drawPreview ((void *)(long)(buffer+preview_offset + header->previewPageListSize), &(progressSaveUnder[0][0]));␊
160␉␉previewTotalSectors = (imageSize-(preview_offset+header->previewSize))/512;␊
161␉␉previewLoadedSectors = 0;␊
162␉␉previewSaveunder = &(progressSaveUnder[0][0]);␊
163␉␉if (preview_offset+header->previewSize<imageSize) {␊
164␉␉␉ReadFileAtOffset (image_filename, (char *)(long)(buffer+preview_offset+header->previewSize),␊
165␉␉␉␉␉␉␉ sizeof(IOHibernateImageHeader)+preview_offset+header->previewSize,␊
166␉␉␉␉␉␉␉ imageSize-(preview_offset+header->previewSize));␊
167␉␉}␊
168␉␉previewTotalSectors = 0;␊
169␉␉previewLoadedSectors = 0;␊
170␉␉previewSaveunder = 0;␊
171#if 0␊
172␉//␉AsereBLN:␊
173␉//␉check_vga_nvidia() didn't work as expected (recursion level > 0 & return value).␊
174␉//␉Unforutnaltely I cannot find a note why to switch back to text mode for nVidia cards only␊
175␉//␉and because it check_vga_nvidia does not work (cards normally are behind a bridge) I will␊
176␉//␉remove it completely␊
177␉//␉setVideoMode( VGA_TEXT_MODE, 0 );␊
178#endif␊
179␉} else {␊
180␉␉ReadFileAtOffset (image_filename, (char *)buffer, sizeof(IOHibernateImageHeader), imageSize);␊
181␉}␊
182// Depends on NVRAM␊
183#if 0␊
184␉if (header->encryptStart) {␊
185␉␉// decryption data␊
186␉␉static const unsigned char first_iv[AES_BLOCK_SIZE]␊
187␉␉= { 0xa3, 0x63, 0x65, 0xa9, 0x0b, 0x71, 0x7b, 0x1c,␊
188␉␉0xdf, 0x9e, 0x5f, 0x32, 0xd7, 0x61, 0x63, 0xda };␊
189␉␉hibernate_cryptvars_t _cryptvars;␊
190␉␉hibernate_cryptvars_t * cryptvars = &_cryptvars;␊
191␉␉␊
192␉␉aes_decrypt_key(&decryptkey,␊
193␉␉␉␉␉␉decryptkeysize,␊
194␉␉␉␉␉␉&cryptvars->ctx.decrypt);␊
195␉␉␉␊
196␉␉// set the vector for the following decryptions␊
197␉␉bcopy(((uint8_t *) header) + header->image1Size - AES_BLOCK_SIZE,␊
198␉␉␉␉&cryptvars->aes_iv[0], AES_BLOCK_SIZE);␊
199␉␉␊
200␉␉// decrypt the buffer␊
201␉␉uint32_t len = (uint32_t)(header->image1Size - header->encryptStart);␊
202␉␉aes_decrypt_cbc(((uint8_t *) header) + header->encryptStart,␊
203␉␉␉␉␉␉&first_iv[0],␊
204␉␉␉␉␉␉len >> 4,␊
205␉␉␉␉␉␉((uint8_t *) header) + header->encryptStart,␊
206␉␉␉␉␉␉&cryptvars->ctx.decrypt);␊
207␉␉bzero(&cryptvars->aes_iv[0], sizeof(cryptvars));␊
208␉␉bzero(&decryptkey, sizeof(decryptkey));␊
209␉}␊
210#endif␊
211␊
212␉WakeKernel(header);␊
213}␊
214

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