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1/*␊
2 * Idea and template by (c) 2009 Evan Lojewski. All rights reserved.␊
3 *␊
4 * NVRAM module by Slice 2010.␊
5 */␊
6␊
7#include "libsaio.h"␊
8#include "modules.h"␊
9#include "boot.h"␊
10#include "bootstruct.h"␊
11#include "pci.h"␊
12#include "efi.h"␊
13#include "smbios_patcher.h"␊
14␊
15#ifndef DEBUG_NVRAM␊
16#define DEBUG_NVRAM 0␊
17#endif␊
18␊
19#if DEBUG_NVRAM␊
20#define DBG(x...) verbose(x)␊
21#else␊
22#define DBG(x...) msglog(x)␊
23#endif␊
24␊
25/*static const char const FIRMWARE_REVISION_PROP[] = "firmware-revision";␊
26static const char const FIRMWARE_ABI_PROP[] = "firmware-abi";␊
27static const char const FIRMWARE_VENDOR_PROP[] = "firmware-vendor";␊
28static const char const FIRMWARE_ABI_32_PROP_VALUE[] = "EFI32";␊
29static const char const FIRMWARE_ABI_64_PROP_VALUE[] = "EFI64";␊
30static const char const SYSTEM_ID_PROP[] = "system-id";␊
31static const char const SYSTEM_SERIAL_PROP[] = "SystemSerialNumber";␊
32static const char const SYSTEM_TYPE_PROP[] = "system-type";␊
33static const char const MODEL_PROP[] = "Model";␊
34 */␊
35const char PLATFORM_UUID[] = "platform-uuid"; ␊
36//EFI_UINT32 const FIRMWARE_FEATURE_MASK = 0x000003FF;␊
37EFI_UINT32 const STATIC_ZERO = 0;␊
38␊
39#define kBL_GLOBAL_NVRAM_GUID "8BE4DF61-93CA-11D2-AA0D-00E098032B8C"␊
40␊
41// Check if a system supports CSM legacy mode␊
42#define kBL_APPLE_VENDOR_NVRAM_GUID "4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14"␊
43#define UUID_LEN␉16␊
44␊
45extern EFI_GUID* getSystemID();␊
46void NVRAM_hook(void* arg1, void* arg2, void* arg3, void* arg4);␊
47void NVRAM_start(void);␊
48int readNVRAM(void);␊
49␊
50typedef struct {␊
51␉char Name[32];␊
52␉char Value[512];␊
53} variables;␊
54variables* var;␊
55␊
56void NVRAM_hook(void* arg1, void* arg2, void* arg3, void* arg4)␊
57{␊
58␉char␉␉bootName[128];␊
59␉␊
60␉char*␉␉ffName;␊
61␉uint8_t *␉FirmwareFeatures;␊
62␉uint8_t *␉FirmwareFeaturesMask;␊
63␉char*␉␉ffmName;␊
64␉char*␉␉boName;␊
65␉char*␉␉bnName;␊
66␉EFI_GUID*␉ret = 0;␊
67␉uint16_t␉bootOptionNumber = 0;␊
68//␉msglog("NVRAM is not implemented yet\n");␊
69␉␊
70//␉return;␊
71␉␊
72␉msglog("NVRAM started\n");␊
73␉␊
74␉//Slice create /options node -> /fakenvram␊
75␉// I need to use fakenvram until I know what is happen␊
76//␉bool UseNVRAM = FALSE;␊
77␉bool ClearNVRAM = FALSE;␊
78␉const char* buff;␊
79␉int cnt;␊
80␉ClearNVRAM = getValueForKey(kClearNVRAM, &buff, &cnt, &bootInfo->bootConfig);␊
81␉if (!ClearNVRAM) {␊
82␉␉readNVRAM();␊
83␉}␊
84␉␉␊
85␉Node* optionsNode = DT__FindNode("/options", true);␊
86␉ffName = malloc(sizeof(PLATFORM_UUID)+1);␊
87␉strcpy(ffName, PLATFORM_UUID);␊
88␉ret = getSystemID();␊
89␉DT__AddProperty(optionsNode, ffName, UUID_LEN, (EFI_UINT32*) ret);␉␉␊
90␉␉␊
91␉␉// this information can be obtained from DMI Type 0␊
92␉␉SMBByte* p = (SMBByte*)FindFirstDmiTableOfType(0, 0x18);␊
93␉␉FirmwareFeatures = malloc(sizeof(SMBByte));␊
94␉␉//TODO - the bufferFF must be composed from bits p[0x12] and [0x13]. Datasheet needed␊
95␉␉*FirmwareFeatures = ((p[19] >> 1) & 1) //USB Legacy is supported␊
96␉␉␉| ((p[18] >> 14) & 2) //Boot from CD is supported␊
97␉␉␉| 0x14; //default for bless (GUID partition)␊
98␉␉␊
99␉␉sprintf(bootName, "%s:FirmwareFeatures", kBL_APPLE_VENDOR_NVRAM_GUID);␊
100␉␉ffName = malloc(sizeof(bootName)+1);␊
101␉␉strcpy(ffName, bootName);␊
102␉␉DT__AddProperty(optionsNode, ffName, sizeof(uint32_t), (char *)FirmwareFeatures); //legacy support␊
103␉␉␊
104␉␉sprintf(bootName, "%s:FirmwareFeaturesMask", kBL_APPLE_VENDOR_NVRAM_GUID);␊
105␉FirmwareFeaturesMask = malloc(sizeof(EFI_UINT32));␊
106␉*FirmwareFeaturesMask = (EFI_UINT32)0x3ff;␊
107␉␉ffmName = malloc(sizeof(bootName)+1);␊
108␉␉strcpy(ffmName, bootName);␉␊
109␉␉DT__AddProperty(optionsNode, ffmName, sizeof(uint32_t), (EFI_UINT32*)FirmwareFeaturesMask); ␉␊
110␉␉␊
111␉␉//TODO - check, validate and fill by bvr structure.␊
112␉␉//here I am not sure what is BootOrder: node or property?␊
113␉␉//Node* bootNode = DT__AddChild(optionsNode, kBL_GLOBAL_NVRAM_GUID ":BootOrder");␊
114␉␉sprintf(bootName, "%s:BootOrder", kBL_GLOBAL_NVRAM_GUID);␊
115␉␉boName = malloc(sizeof(bootName)+1);␊
116␉␉strcpy(boName, bootName);␉␉␊
117␉␉DT__AddProperty(optionsNode, boName, sizeof(uint32_t), (EFI_UINT32*)&STATIC_ZERO);␉␊
118␉␉␊
119␉␉sprintf(bootName, "%s:Boot%04hx", kBL_GLOBAL_NVRAM_GUID, bootOptionNumber);␊
120␉␉bnName = malloc(sizeof(bootName)+1);␊
121␉␉strcpy(bnName, bootName);␉␉␉␊
122␉␉DT__AddProperty(optionsNode, bnName, sizeof(uint32_t), (EFI_UINT32*)&STATIC_ZERO); ␊
123␉␉␊
124␉␉␊
125␉␉//can we add here boot-properties?␊
126␉␉//␉optionsNode = DT__FindNode("chosen", true);␊
127#if 1 //NOTYET␊
128␉␉int lbC = 0;␊
129␉␉while(((char*)&bootInfo->bootConfig)[lbC++]);␊
130␉␉if (lbC > sizeof(bootInfo->bootConfig)) lbC = sizeof(bootInfo->bootConfig);␊
131␉␉DT__AddProperty(optionsNode, "boot-args", lbC, (char*)&bootInfo->bootConfig);␉␊
132#endif␊
133␉␉//TODO - BootCamp emulation?␊
134␉␉/*␊
135␉␉ romNode = DT__FindNode("/rom", true);␊
136␉␉ DT__AddProperty(romNode, "fv-main-address"... //provided by AppleSMBIOS␊
137␉␉ DT__AddProperty(romNode, "fv-main-size"...␊
138␉␉ "IOEFIDevicePathType" -> "MediaFirmwareVolumeFilePath"␊
139␉␉ "Guid" -> "2B0585EB-D8B8-49A9-8B8C-E21B01AEF2B7"␊
140␉␉ ␊
141␉␉ */␊
142␉␉//end Slice␊
143}␊
144␊
145void NVRAM_start()␊
146{␊
147␉register_hook_callback("Kernel Start", &NVRAM_hook);␊
148}␊
149␊
150const char NVRAM_INF[] = "nvram.inf";␊
151int readNVRAM()␊
152{␊
153␉int fd, fsize;␊
154␉char* nvr = 0;␊
155␉if ((fd = open(NVRAM_INF, 0)) < 0) {␊
156␉␉return -1;␊
157␉}␊
158␉fsize = file_size(fd);␊
159␉if (!fsize) {␊
160␉␉close (fd);␊
161␉␉return -1;␊
162␉}␊
163␉if ((nvr = malloc(fsize)) == NULL) {␊
164␉␉verbose("[ERROR] alloc NVRAM memory failed\n");␊
165␉␉close (fd);␊
166␉␉return -1;␊
167␉}␊
168␉if (read (fd, nvr, fsize) != fsize) {␊
169␉␉verbose("[ERROR] read %s failed\n", NVRAM_INF);␊
170␉␉close (fd);␊
171␉␉return -1;␊
172␉}␊
173␉close (fd);␊
174␉if ((var = malloc(fsize)) == NULL) {␊
175␉␉verbose("[ERROR] alloc VAR memory failed\n");␊
176␉␉return -1;␊
177␉}␊
178␉int i = 0;␊
179␉bool skipGUID;␊
180␉while (*nvr) {␊
181␉␉int j = 0;␊
182␉␉skipGUID = false;␊
183␉␉while (*nvr != 9) {␊
184␉␉␉if (*nvr == 4) {␊
185␉␉␉␉skipGUID = true; //TODO this is GUID␊
186␉␉␉}␊
187␉␉␉var[i].Name[j++] = *nvr++; ␊
188␉␉}␊
189␉␉nvr++; //skip \09␊
190␉␉var[i].Name[j] = 0; //end of c-string␊
191␉␉if (skipGUID) {␊
192␉␉␉//TODO this is GUID␊
193␉␉␉while (*nvr++ != 0x0A) {}␊
194␉␉␉i--;␊
195␉␉} else {␊
196␉␉␉␊
197␉␉␉j = 0;␊
198␉␉␉char c;␊
199␉␉␉while (*nvr != 0x0A) {␊
200␉␉␉␉c = *nvr++;␊
201␉␉␉␉if (c == 0x25) { //TODO this is hex ␊
202␉␉␉␉␉int k1=*nvr++;␊
203␉␉␉␉␉if ((k1 > 0x30) && (k1 < 0x39)) {␊
204␉␉␉␉␉␉k1 = k1 - 0x30;␊
205␉␉␉␉␉}␊
206␉␉␉␉␉if ((k1 > 0x60) && (k1 < 0x69)) {␊
207␉␉␉␉␉␉k1 = k1 - 0x60 + 10;␊
208␉␉␉␉␉}␊
209␉␉␉␉␉int k2=*nvr++;␊
210␉␉␉␉␉if ((k2 > 0x30) && (k2 < 0x39)) {␊
211␉␉␉␉␉␉k2 = k2 - 0x30;␊
212␉␉␉␉␉}␊
213␉␉␉␉␉if ((k2 > 0x60) && (k2 < 0x69)) {␊
214␉␉␉␉␉␉k2 = k2 - 0x60 + 10;␊
215␉␉␉␉␉}␊
216␉␉␉␉␉c = (k1 << 4) + k2;␊
217␉␉␉␉␉break; ␊
218␉␉␉␉}␊
219␉␉␉␉var[i].Value[j++] = c; ␊
220␉␉␉}␊
221␉␉}␊
222␉␉i++;␊
223␉␉if (i > fsize) {␊
224␉␉␉break;␊
225␉␉}␊
226␉}␊
227␉␊
228␉return 0;␊
229}

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