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1/*␊
2 * Copyright 2008 mackerintel␊
3 */␊
4␊
5#include "libsaio.h"␊
6#include "boot.h"␊
7#include "bootstruct.h"␊
8#include "acpi.h"␊
9#include "efi_tables.h"␊
10#include "fake_efi.h"␊
11#include "dsdt_patcher.h"␊
12#include "platform.h"␊
13␊
14#ifndef DEBUG_DSDT␊
15#define DEBUG_DSDT 0␊
16#endif␊
17␊
18#if DEBUG_DSDT==2␊
19#define DBG(x...) {printf(x); sleep(1);}␊
20#elif DEBUG_DSDT==1␊
21#define DBG(x...) printf(x)␊
22#else␊
23#define DBG(x...)␊
24#endif␊
25␊
26/* Gets the ACPI 1.0 RSDP address */␊
27static struct acpi_2_rsdp* getAddressOfAcpiTable()␊
28{␊
29 /* TODO: Before searching the BIOS space we are supposed to search the first 1K of the EBDA */␊
30␉␊
31 void *acpi_addr = (void*)ACPI_RANGE_START;␊
32 for(; acpi_addr <= (void*)ACPI_RANGE_END; acpi_addr += 16)␊
33 {␊
34 if(*(uint64_t *)acpi_addr == ACPI_SIGNATURE_UINT64_LE)␊
35 {␊
36 uint8_t csum = checksum8(acpi_addr, 20);␊
37 if(csum == 0)␊
38 {␊
39 // Only return the table if it is a true version 1.0 table (Revision 0)␊
40 if(((struct acpi_2_rsdp*)acpi_addr)->Revision == 0)␊
41 return acpi_addr;␊
42 }␊
43 }␊
44 }␊
45 return NULL;␊
46}␊
47␊
48/* Gets the ACPI 2.0 RSDP address */␊
49static struct acpi_2_rsdp* getAddressOfAcpi20Table()␊
50{␊
51 /* TODO: Before searching the BIOS space we are supposed to search the first 1K of the EBDA */␊
52␉␊
53 void *acpi_addr = (void*)ACPI_RANGE_START;␊
54 for(; acpi_addr <= (void*)ACPI_RANGE_END; acpi_addr += 16)␊
55 {␊
56 if(*(uint64_t *)acpi_addr == ACPI_SIGNATURE_UINT64_LE)␊
57 {␊
58 uint8_t csum = checksum8(acpi_addr, 20);␊
59␊
60 /* Only assume this is a 2.0 or better table if the revision is greater than 0␊
61 * NOTE: ACPI 3.0 spec only seems to say that 1.0 tables have revision 1␊
62 * and that the current revision is 2.. I am going to assume that rev > 0 is 2.0.␊
63 */␊
64␊
65 if(csum == 0 && (((struct acpi_2_rsdp*)acpi_addr)->Revision > 0))␊
66 {␊
67 uint8_t csum2 = checksum8(acpi_addr, sizeof(struct acpi_2_rsdp));␊
68 if(csum2 == 0)␊
69 return acpi_addr;␊
70 }␊
71 }␊
72 }␊
73 return NULL;␊
74}␊
75␊
76void *loadACPITable (const char *filename)␊
77{␊
78␉void *tableAddr;␊
79␉int fd;␊
80␉char dirspec[512];␊
81␊
82␉// Check booting partition␊
83␉sprintf(dirspec,"%s",filename);␊
84␉fd=open (dirspec,0);␊
85␉if (fd<0)␊
86␉{␉// Check Extra on booting partition␊
87␉␉sprintf(dirspec,"/Extra/%s",filename);␊
88␉␉fd=open (dirspec,0);␊
89␉␉if (fd<0)␊
90␉␉{␉// Fall back to booter partition␊
91␉␉␉sprintf(dirspec,"bt(0,0)/Extra/%s",filename);␊
92␉␉␉fd=open (dirspec,0);␊
93␉␉␉if (fd<0)␊
94␉␉␉{␊
95␉␉␉␉verbose("ACPI Table not found: %s\n", filename);␊
96␉␉␉␉return NULL;␊
97␉␉␉}␊
98␉␉}␊
99␉}␊
100␊
101␉tableAddr=(void*)AllocateKernelMemory(file_size (fd));␊
102␉if (tableAddr)␊
103␉{␊
104␉␉if (read (fd, tableAddr, file_size (fd))!=file_size (fd))␊
105␉␉{␊
106␉␉␉printf("Couldn't read table %s\n",dirspec);␊
107␉␉␉free (tableAddr);␊
108␉␉␉close (fd);␊
109␉␉␉return NULL;␊
110␉␉}␊
111␊
112␉␉DBG("Table %s read and stored at: %x\n", dirspec, tableAddr);␊
113␉␉close (fd);␊
114␉␉return tableAddr;␊
115␉}␊
116␊
117␉printf("Couldn't allocate memory for table %s\n", dirspec);␊
118␉close (fd);␊
119␉return NULL;␊
120}␊
121␊
122struct acpi_2_fadt *␊
123patch_fadt(struct acpi_2_fadt *fadt, void *new_dsdt)␊
124{␊
125␊
126␉struct acpi_2_fadt *fadt_mod;␊
127␉BOOL fadt_rev2_needed = NO;␊
128␉BOOL fix_restart;␊
129␊
130␉// Restart Fix␊
131␉if (Platform.CPU.Vendor == 0x756E6547) {␉/* Intel */␊
132␉␉fix_restart = YES;␊
133␉␉getBoolForKey(kRestartFix, &fix_restart, &bootInfo->bootConfig);␊
134␉} else {␊
135␉␉verbose ("Not an Intel platform: Restart Fix not applied !!!\n");␊
136␉␉fix_restart = NO;␊
137␉}␊
138␊
139␉if (fix_restart)␊
140␉␉fadt_rev2_needed = YES;␊
141␊
142␉// Allocate new fadt table␊
143␉if (fadt->Length < 0x84 && fadt_rev2_needed)␊
144␉{␊
145␉␉fadt_mod=(struct acpi_2_fadt *)AllocateKernelMemory(0x84);␊
146␉␉memcpy(fadt_mod, fadt, fadt->Length);␊
147␉␉fadt_mod->Length = 0x84;␊
148␉␉fadt_mod->Revision = 0x02; // FADT rev 2 (ACPI 1.0B MS extensions)␊
149␉}␊
150␉else␊
151␉{␊
152␉␉fadt_mod=(struct acpi_2_fadt *)AllocateKernelMemory(fadt->Length);␊
153␉␉memcpy(fadt_mod, fadt, fadt->Length);␊
154␉}␊
155␊
156␉// Patch FADT to fix restart␊
157␉if (fix_restart)␊
158␉{␊
159␉␉fadt_mod->Flags|= 0x400;␊
160␉␉fadt_mod->Reset_SpaceID␉␉= 0x01; // System I/O␊
161␉␉fadt_mod->Reset_BitWidth␉= 0x08; // 1 byte␊
162␉␉fadt_mod->Reset_BitOffset␉= 0x00; // Offset 0␊
163␉␉fadt_mod->Reset_AccessWidth␉= 0x01; // Byte access␊
164␉␉fadt_mod->Reset_Address␉␉= 0x0cf9; // Address of the register␊
165␉␉fadt_mod->Reset_Value␉␉= 0x06; // Value to write to reset the system␊
166␉␉verbose("FADT: Restart Fix applied !\n");␊
167␉}␊
168␊
169␉// Patch DSDT Address␊
170␉DBG("DSDT: Old @%x,%x, ",fadt_mod->DSDT,fadt_mod->X_DSDT);␊
171␊
172␉fadt_mod->DSDT=(uint32_t)new_dsdt;␊
173␉if ((uint32_t)(&(fadt_mod->X_DSDT))-(uint32_t)fadt_mod+8<=fadt_mod->Length)␊
174␉␉fadt_mod->X_DSDT=(uint32_t)new_dsdt;␊
175␊
176␉DBG("New @%x,%x\n",fadt_mod->DSDT,fadt_mod->X_DSDT);␊
177␊
178␉// Correct the checksum␊
179␉fadt_mod->Checksum=0;␊
180␉fadt_mod->Checksum=256-checksum8(fadt_mod,fadt_mod->Length);␊
181␊
182␉return fadt_mod;␊
183}␊
184␊
185/* Setup ACPI without replacing DSDT. */␊
186int setupAcpiNoMod()␊
187{␊
188//␉addConfigurationTable(&gEfiAcpiTableGuid, getAddressOfAcpiTable(), "ACPI");␊
189//␉addConfigurationTable(&gEfiAcpi20TableGuid, getAddressOfAcpi20Table(), "ACPI_20");␊
190␉acpi10_p = (uint32_t)getAddressOfAcpiTable();␊
191␉acpi20_p = (uint32_t)getAddressOfAcpi20Table();␊
192␉addConfigurationTable(&gEfiAcpiTableGuid, &acpi10_p, "ACPI");␊
193␉if(acpi20_p) addConfigurationTable(&gEfiAcpi20TableGuid, &acpi20_p, "ACPI_20");␊
194␉return 1;␊
195}␊
196␊
197/* Setup ACPI. Replace DSDT if DSDT.aml is found */␊
198int setupAcpi()␊
199{␊
200␉int version;␊
201␉void *new_dsdt;␊
202␉const char *dsdt_filename;␊
203␉/* const char *facp_filename; */␊
204␉int len;␊
205␉boolean_t drop_ssdt=NO;␊
206␊
207␉//DBG("Enter setupACPI\n");␊
208␊
209␉if (!getValueForKey("DSDT", &dsdt_filename, &len, &bootInfo->bootConfig))␊
210␉␉dsdt_filename="DSDT.aml";␊
211␉␊
212␉// Load replacement DSDT␊
213␉new_dsdt=loadACPITable(dsdt_filename);␊
214␉if (!new_dsdt)␊
215␉{␊
216␉␉return setupAcpiNoMod();␊
217␉}␊
218␉DBG("New DSDT Loaded in memory\n");␊
219␉␊
220␉{␊
221␉␉BOOL tmp;␊
222␉␉drop_ssdt=getBoolForKey("DropSSDT",&tmp, &bootInfo->bootConfig)&&tmp;␊
223␉}␊
224␉␊
225␉// Do the same procedure for both versions of ACPI␊
226␉for (version=0;version<2;version++)␊
227␉{␊
228␉␉struct acpi_2_rsdp *rsdp, *rsdp_mod;␊
229␉␉struct acpi_2_rsdt *rsdt, *rsdt_mod;␊
230␉␉int rsdplength;␊
231␉␉␊
232␉␉// Find original rsdp␊
233␉␉rsdp=(struct acpi_2_rsdp *)(version?getAddressOfAcpi20Table():getAddressOfAcpiTable());␊
234␉␉if (!rsdp)␊
235␉␉{␊
236␉␉␉DBG("No ACPI version %d found. Ignoring\n", version+1);␊
237␉␉␉if (version)␊
238␉␉␉␉addConfigurationTable(&gEfiAcpi20TableGuid, NULL, "ACPI_20");␊
239␉␉␉else␊
240␉␉␉␉addConfigurationTable(&gEfiAcpiTableGuid, NULL, "ACPI");␊
241␉␉␉continue;␊
242␉␉}␊
243␉␉rsdplength=version?rsdp->Length:20;␊
244␊
245␉␉DBG("RSDP version %d found @%x. Length=%d\n",version+1,rsdp,rsdplength);␊
246␊
247␉␉/* FIXME: no check that memory allocation succeeded ␊
248␉␉ * Copy and patch RSDP,RSDT, XSDT and FADT␊
249␉␉ * For more info see ACPI Specification pages 110 and following␊
250␉␉ */␊
251␊
252␉␉rsdp_mod=(struct acpi_2_rsdp *) AllocateKernelMemory(rsdplength);␊
253␉␉memcpy(rsdp_mod, rsdp, rsdplength); ␊
254␉␉rsdt=(struct acpi_2_rsdt *)(rsdp->RsdtAddress);␊
255␊
256␉␉DBG("RSDT @%x, Length %d\n",rsdt, rsdt->Length);␊
257␉␉␊
258␉␉if (rsdt && (uint32_t)rsdt !=0xffffffff && rsdt->Length<0x10000)␊
259␉␉{␊
260␉␉␉uint32_t *rsdt_entries;␊
261␉␉␉int rsdt_entries_num;␊
262␉␉␉int dropoffset=0, i;␊
263␉␉␉␊
264␉␉␉rsdt_mod=(struct acpi_2_rsdt *)AllocateKernelMemory(rsdt->Length); ␊
265␉␉␉memcpy (rsdt_mod, rsdt, rsdt->Length);␊
266␉␉␉rsdp_mod->RsdtAddress=(uint32_t)rsdt_mod;␊
267␉␉␉rsdt_entries_num=(rsdt_mod->Length-sizeof(struct acpi_2_rsdt))/4;␊
268␉␉␉rsdt_entries=(uint32_t *)(rsdt_mod+1);␊
269␉␉␉for (i=0;i<rsdt_entries_num;i++)␊
270␉␉␉{␊
271␉␉␉␉char *table=(char *)(rsdt_entries[i]);␊
272␉␉␉␉if (!table)␊
273␉␉␉␉␉continue;␊
274␊
275␉␉␉␉DBG("TABLE %c%c%c%c,",table[0],table[1],table[2],table[3]);␊
276␊
277␉␉␉␉rsdt_entries[i-dropoffset]=rsdt_entries[i];␊
278␉␉␉␉if (drop_ssdt && table[0]=='S' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
279␉␉␉␉{␊
280␉␉␉␉␉dropoffset++;␊
281␉␉␉␉␉continue;␊
282␉␉␉␉}␊
283␉␉␉␉if (table[0]=='D' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
284␉␉␉␉{␊
285␉␉␉␉␉DBG("DSDT found\n");␊
286␉␉␉␉␉rsdt_entries[i-dropoffset]=(uint32_t)new_dsdt;␊
287␉␉␉␉␉continue;␊
288␉␉␉␉}␊
289␉␉␉␉if (table[0]=='F' && table[1]=='A' && table[2]=='C' && table[3]=='P')␊
290␉␉␉␉{␊
291␉␉␉␉␉struct acpi_2_fadt *fadt, *fadt_mod;␊
292␉␉␉␉␉fadt=(struct acpi_2_fadt *)rsdt_entries[i];␊
293␊
294␉␉␉␉␉DBG("FADT found @%x, Length %d\n",fadt, fadt->Length);␊
295␊
296␉␉␉␉␉if (!fadt || (uint32_t)fadt == 0xffffffff || fadt->Length>0x10000)␊
297␉␉␉␉␉{␊
298␉␉␉␉␉␉printf("FADT incorrect. Not modified\n");␊
299␉␉␉␉␉␉continue;␊
300␉␉␉␉␉}␊
301␉␉␉␉␉␊
302␉␉␉␉␉fadt_mod = patch_fadt(fadt, new_dsdt);␊
303␊
304␉␉␉␉␉rsdt_entries[i-dropoffset]=(uint32_t)fadt_mod;␊
305␉␉␉␉␉continue;␊
306␉␉␉␉}␊
307␉␉␉}␊
308␉␉␉DBG("\n");␊
309␊
310␉␉␉// Correct the checksum of RSDT␊
311␉␉␉rsdt_mod->Length-=4*dropoffset;␊
312␊
313␉␉␉DBG("RSDT: Original checksum %d, ", rsdt_mod->Checksum);␊
314␊
315␉␉␉rsdt_mod->Checksum=0;␊
316␉␉␉rsdt_mod->Checksum=256-checksum8(rsdt_mod,rsdt_mod->Length);␊
317␊
318␉␉␉DBG("New checksum %d at %x\n", rsdt_mod->Checksum,rsdt_mod);␊
319␉␉}␊
320␉␉else␊
321␉␉{␊
322␉␉␉rsdp_mod->RsdtAddress=0;␊
323␉␉␉printf("RSDT not found or RSDT incorrect\n");␊
324␉␉}␊
325␊
326␉␉if (version)␊
327␉␉{␊
328␉␉␉struct acpi_2_xsdt *xsdt, *xsdt_mod;␊
329␊
330␉␉␉// FIXME: handle 64-bit address correctly␊
331␊
332␉␉␉xsdt=(struct acpi_2_xsdt*) ((uint32_t)rsdp->XsdtAddress);␊
333␉␉␉DBG("XSDT @%x;%x, Length=%d\n", (uint32_t)(rsdp->XsdtAddress>>32),(uint32_t)rsdp->XsdtAddress,␊
334␉␉␉␉␉xsdt->Length);␊
335␉␉␉if (xsdt && (uint64_t)rsdp->XsdtAddress<0xffffffff && xsdt->Length<0x10000)␊
336␉␉␉{␊
337␉␉␉␉uint64_t *xsdt_entries;␊
338␉␉␉␉int xsdt_entries_num, i;␊
339␉␉␉␉int dropoffset=0;␊
340␉␉␉␉␊
341␉␉␉␉xsdt_mod=(struct acpi_2_xsdt*)AllocateKernelMemory(xsdt->Length); ␊
342␉␉␉␉memcpy(xsdt_mod, xsdt, xsdt->Length);␊
343␉␉␉␉rsdp_mod->XsdtAddress=(uint32_t)xsdt_mod;␊
344␉␉␉␉xsdt_entries_num=(xsdt_mod->Length-sizeof(struct acpi_2_xsdt))/8;␊
345␉␉␉␉xsdt_entries=(uint64_t *)(xsdt_mod+1);␊
346␉␉␉␉for (i=0;i<xsdt_entries_num;i++)␊
347␉␉␉␉{␊
348␉␉␉␉␉char *table=(char *)((uint32_t)(xsdt_entries[i]));␊
349␉␉␉␉␉if (!table)␊
350␉␉␉␉␉␉continue;␊
351␉␉␉␉␉xsdt_entries[i-dropoffset]=xsdt_entries[i];␊
352␉␉␉␉␉if (drop_ssdt && table[0]=='S' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
353␉␉␉␉␉{␊
354␉␉␉␉␉␉dropoffset++;␊
355␉␉␉␉␉␉continue;␊
356␉␉␉␉␉}␉␉␉␉␉␊
357␉␉␉␉␉if (table[0]=='D' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
358␉␉␉␉␉{␊
359␉␉␉␉␉␉DBG("DSDT found\n");␊
360␊
361␉␉␉␉␉␉xsdt_entries[i-dropoffset]=(uint32_t)new_dsdt;␊
362␊
363␉␉␉␉␉␉DBG("TABLE %c%c%c%c@%x,",table[0],table[1],table[2],table[3],xsdt_entries[i]);␊
364␉␉␉␉␉␉␊
365␉␉␉␉␉␉continue;␊
366␉␉␉␉␉}␊
367␉␉␉␉␉if (table[0]=='F' && table[1]=='A' && table[2]=='C' && table[3]=='P')␊
368␉␉␉␉␉{␊
369␉␉␉␉␉␉struct acpi_2_fadt *fadt, *fadt_mod;␊
370␉␉␉␉␉␉fadt=(struct acpi_2_fadt *)(uint32_t)xsdt_entries[i];␊
371␊
372␉␉␉␉␉␉DBG("FADT found @%x,%x, Length %d\n",(uint32_t)(xsdt_entries[i]>>32),fadt, ␊
373␉␉␉␉␉␉␉␉ fadt->Length);␊
374␊
375␉␉␉␉␉␉if (!fadt || (uint64_t)xsdt_entries[i] >= 0xffffffff || fadt->Length>0x10000)␊
376␉␉␉␉␉␉{␊
377␉␉␉␉␉␉␉printf("FADT incorrect or after 4GB. Dropping XSDT\n");␊
378␉␉␉␉␉␉␉goto drop_xsdt;␊
379␉␉␉␉␉␉}␊
380␊
381␉␉␉␉␉␉fadt_mod = patch_fadt(fadt, new_dsdt);␊
382␊
383␉␉␉␉␉␉xsdt_entries[i-dropoffset]=(uint32_t)fadt_mod;␊
384␊
385␉␉␉␉␉␉DBG("TABLE %c%c%c%c@%x,",table[0],table[1],table[2],table[3],xsdt_entries[i]);␊
386␊
387␉␉␉␉␉␉continue;␊
388␉␉␉␉␉}␊
389␊
390␉␉␉␉␉DBG("TABLE %c%c%c%c@%x,",table[0],table[1],table[2],table[3],xsdt_entries[i]);␊
391␊
392␉␉␉␉}␊
393␊
394␉␉␉␉// Correct the checksum of XSDT␊
395␉␉␉␉xsdt_mod->Length-=8*dropoffset;␊
396␉␉␉␉xsdt_mod->Checksum=0;␊
397␉␉␉␉xsdt_mod->Checksum=256-checksum8(xsdt_mod,xsdt_mod->Length);␊
398␉␉␉}␊
399␉␉␉else␊
400␉␉␉{␊
401␉␉␉drop_xsdt:␊
402␊
403␉␉␉␉DBG("About to drop XSDT\n");␊
404␊
405␉␉␉␉/*FIXME: Now we just hope that if MacOS doesn't find XSDT it reverts to RSDT. ␊
406␉␉␉␉ * A Better strategy would be to generate␊
407␉␉␉␉ */␊
408␊
409␉␉␉␉rsdp_mod->XsdtAddress=0xffffffffffffffffLL;␊
410␉␉␉␉printf("XSDT not found or XSDT incorrect\n");␊
411␉␉␉}␊
412␉␉}␊
413␊
414␉␉// Correct the checksum of RSDP ␊
415␊
416␉␉DBG("RSDP: Original checksum %d, ", rsdp_mod->Checksum);␊
417␊
418␉␉rsdp_mod->Checksum=0;␊
419␉␉rsdp_mod->Checksum=256-checksum8(rsdp_mod,20);␊
420␊
421␉␉DBG("New checksum %d\n", rsdp_mod->Checksum);␊
422␊
423␉␉if (version)␊
424␉␉{␊
425␉␉␉DBG("RSDP: Original extended checksum %d", rsdp_mod->ExtendedChecksum);␊
426␊
427␉␉␉rsdp_mod->ExtendedChecksum=0;␊
428␉␉␉rsdp_mod->ExtendedChecksum=256-checksum8(rsdp_mod,rsdp_mod->Length);␊
429␊
430␉␉␉DBG("New extended checksum %d\n", rsdp_mod->ExtendedChecksum);␊
431␊
432␉␉}␊
433␉␉␊
434␉␉verbose("Patched ACPI version %d DSDT\n", version+1);␊
435␉␉if (version)␊
436␉␉{␊
437␉␉␉acpi20_p = (uint32_t)rsdp_mod;␊
438␉␉␉addConfigurationTable(&gEfiAcpi20TableGuid, &acpi20_p, "ACPI_20");␊
439␉␉}␊
440␉␉else␊
441␉␉{␊
442␉␉␉acpi10_p = (uint32_t)rsdp_mod;␊
443␉␉␉addConfigurationTable(&gEfiAcpiTableGuid, &acpi10_p, "ACPI");␊
444␉␉}␊
445␉}␊
446␉#if DEBUG_DSDT␊
447␉printf("Press a key to continue... (DEBUG_DSDT)\n");␊
448␉getc();␊
449␉#endif␊
450␉return 1;␊
451}␊
452

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