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Root/trunk/i386/libsaio/dsdt_patcher.c

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 = false;␊
128␉bool fix_restart;␊
129␊
130␉// Restart Fix␊
131␉if (Platform.CPU.Vendor == 0x756E6547) {␉/* Intel */␊
132␉␉fix_restart = true;␊
133␉␉getBoolForKey(kRestartFix, &fix_restart, &bootInfo->bootConfig);␊
134␉} else {␊
135␉␉verbose ("Not an Intel platform: Restart Fix not applied !!!\n");␊
136␉␉fix_restart = false;␊
137␉}␊
138␊
139␉if (fix_restart) fadt_rev2_needed = true;␊
140␊
141␉// Allocate new fadt table␊
142␉if (fadt->Length < 0x84 && fadt_rev2_needed)␊
143␉{␊
144␉␉fadt_mod=(struct acpi_2_fadt *)AllocateKernelMemory(0x84);␊
145␉␉memcpy(fadt_mod, fadt, fadt->Length);␊
146␉␉fadt_mod->Length = 0x84;␊
147␉␉fadt_mod->Revision = 0x02; // FADT rev 2 (ACPI 1.0B MS extensions)␊
148␉}␊
149␉else␊
150␉{␊
151␉␉fadt_mod=(struct acpi_2_fadt *)AllocateKernelMemory(fadt->Length);␊
152␉␉memcpy(fadt_mod, fadt, fadt->Length);␊
153␉}␊
154␊
155␉// Set PM_Profile from System-type␊
156␉if (fadt_mod->PM_Profile != Platform.Type) {␊
157␉␉verbose("FADT: changing PM_Profile from 0x%02x to 0x%02x\n", fadt_mod->PM_Profile, Platform.Type);␊
158␉␉fadt_mod->PM_Profile = Platform.Type;␊
159␉}␊
160␊
161␉// Patch FADT to fix restart␊
162␉if (fix_restart)␊
163␉{␊
164␉␉fadt_mod->Flags|= 0x400;␊
165␉␉fadt_mod->Reset_SpaceID␉␉= 0x01; // System I/O␊
166␉␉fadt_mod->Reset_BitWidth␉= 0x08; // 1 byte␊
167␉␉fadt_mod->Reset_BitOffset␉= 0x00; // Offset 0␊
168␉␉fadt_mod->Reset_AccessWidth␉= 0x01; // Byte access␊
169␉␉fadt_mod->Reset_Address␉␉= 0x0cf9; // Address of the register␊
170␉␉fadt_mod->Reset_Value␉␉= 0x06; // Value to write to reset the system␊
171␉␉verbose("FADT: Restart Fix applied !\n");␊
172␉}␊
173␊
174␉// Patch DSDT Address␊
175␉DBG("DSDT: Old @%x,%x, ",fadt_mod->DSDT,fadt_mod->X_DSDT);␊
176␊
177␉fadt_mod->DSDT=(uint32_t)new_dsdt;␊
178␉if ((uint32_t)(&(fadt_mod->X_DSDT))-(uint32_t)fadt_mod+8<=fadt_mod->Length)␊
179␉␉fadt_mod->X_DSDT=(uint32_t)new_dsdt;␊
180␊
181␉DBG("New @%x,%x\n",fadt_mod->DSDT,fadt_mod->X_DSDT);␊
182␊
183␉// Correct the checksum␊
184␉fadt_mod->Checksum=0;␊
185␉fadt_mod->Checksum=256-checksum8(fadt_mod,fadt_mod->Length);␊
186␊
187␉return fadt_mod;␊
188}␊
189␊
190/* Setup ACPI without replacing DSDT. */␊
191int setupAcpiNoMod()␊
192{␊
193//␉addConfigurationTable(&gEfiAcpiTableGuid, getAddressOfAcpiTable(), "ACPI");␊
194//␉addConfigurationTable(&gEfiAcpi20TableGuid, getAddressOfAcpi20Table(), "ACPI_20");␊
195␉/* XXX aserebln why uint32 cast if pointer is uint64 ? */␊
196␉acpi10_p = (uint32_t)getAddressOfAcpiTable();␊
197␉acpi20_p = (uint32_t)getAddressOfAcpi20Table();␊
198␉addConfigurationTable(&gEfiAcpiTableGuid, &acpi10_p, "ACPI");␊
199␉if(acpi20_p) addConfigurationTable(&gEfiAcpi20TableGuid, &acpi20_p, "ACPI_20");␊
200␉return 1;␊
201}␊
202␊
203/* Setup ACPI. Replace DSDT if DSDT.aml is found */␊
204int setupAcpi(void)␊
205{␊
206␉int version;␊
207␉void *new_dsdt;␊
208␉const char *dsdt_filename;␊
209␊
210␉char dirspec[512];␊
211␊
212␉int fd;␊
213␊
214␉int len;␊
215␉bool tmp;␊
216␉bool drop_ssdt;␊
217␉bool fix_restart;␊
218␊
219␉if (!getValueForKey(kDSDT, &dsdt_filename, &len, &bootInfo->bootConfig))␊
220␉␉dsdt_filename="DSDT.aml";␊
221␉␊
222␉// Load replacement DSDT␊
223␉new_dsdt=loadACPITable(dsdt_filename);␊
224␉if (!new_dsdt)␊
225␉{␊
226␉␉close(fd);␊
227␉␉return setupAcpiNoMod();␊
228␉}␊
229␊
230␉DBG("New DSDT Loaded in memory\n");␊
231␉␊
232␉{␊
233␉␉bool tmp;␊
234␉␉drop_ssdt=getBoolForKey(kDropSSDT, &tmp, &bootInfo->bootConfig)&&tmp;␊
235␉}␊
236␊
237␉// Do the same procedure for both versions of ACPI␊
238␉for (version=0; version<2; version++) {␊
239␉␉struct acpi_2_rsdp *rsdp, *rsdp_mod;␊
240␉␉struct acpi_2_rsdt *rsdt, *rsdt_mod;␊
241␉␉int rsdplength;␊
242␉␉␊
243␉␉// Find original rsdp␊
244␉␉rsdp=(struct acpi_2_rsdp *)(version?getAddressOfAcpi20Table():getAddressOfAcpiTable());␊
245␉␉if (!rsdp)␊
246␉␉{␊
247␉␉␉DBG("No ACPI version %d found. Ignoring\n", version+1);␊
248␉␉␉if (version)␊
249␉␉␉␉addConfigurationTable(&gEfiAcpi20TableGuid, NULL, "ACPI_20");␊
250␉␉␉else␊
251␉␉␉␉addConfigurationTable(&gEfiAcpiTableGuid, NULL, "ACPI");␊
252␉␉␉continue;␊
253␉␉}␊
254␉␉rsdplength=version?rsdp->Length:20;␊
255␊
256␉␉DBG("RSDP version %d found @%x. Length=%d\n",version+1,rsdp,rsdplength);␊
257␊
258␉␉/* FIXME: no check that memory allocation succeeded ␊
259␉␉ * Copy and patch RSDP,RSDT, XSDT and FADT␊
260␉␉ * For more info see ACPI Specification pages 110 and following␊
261␉␉ */␊
262␊
263␉␉rsdp_mod=(struct acpi_2_rsdp *) AllocateKernelMemory(rsdplength);␊
264␉␉memcpy(rsdp_mod, rsdp, rsdplength); ␊
265␉␉rsdt=(struct acpi_2_rsdt *)(rsdp->RsdtAddress);␊
266␊
267␉␉DBG("RSDT @%x, Length %d\n",rsdt, rsdt->Length);␊
268␉␉␊
269␉␉if (rsdt && (uint32_t)rsdt !=0xffffffff && rsdt->Length<0x10000)␊
270␉␉{␊
271␉␉␉uint32_t *rsdt_entries;␊
272␉␉␉int rsdt_entries_num;␊
273␉␉␉int dropoffset=0, i;␊
274␉␉␉␊
275␉␉␉rsdt_mod=(struct acpi_2_rsdt *)AllocateKernelMemory(rsdt->Length); ␊
276␉␉␉memcpy (rsdt_mod, rsdt, rsdt->Length);␊
277␉␉␉rsdp_mod->RsdtAddress=(uint32_t)rsdt_mod;␊
278␉␉␉rsdt_entries_num=(rsdt_mod->Length-sizeof(struct acpi_2_rsdt))/4;␊
279␉␉␉rsdt_entries=(uint32_t *)(rsdt_mod+1);␊
280␉␉␉for (i=0;i<rsdt_entries_num;i++)␊
281␉␉␉{␊
282␉␉␉␉char *table=(char *)(rsdt_entries[i]);␊
283␉␉␉␉if (!table)␊
284␉␉␉␉␉continue;␊
285␊
286␉␉␉␉DBG("TABLE %c%c%c%c,",table[0],table[1],table[2],table[3]);␊
287␊
288␉␉␉␉rsdt_entries[i-dropoffset]=rsdt_entries[i];␊
289␉␉␉␉if (drop_ssdt && table[0]=='S' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
290␉␉␉␉{␊
291␉␉␉␉␉dropoffset++;␊
292␉␉␉␉␉continue;␊
293␉␉␉␉}␊
294␉␉␉␉if (table[0]=='D' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
295␉␉␉␉{␊
296␉␉␉␉␉DBG("DSDT found\n");␊
297␉␉␉␉␉rsdt_entries[i-dropoffset]=(uint32_t)new_dsdt;␊
298␉␉␉␉␉continue;␊
299␉␉␉␉}␊
300␉␉␉␉if (table[0]=='F' && table[1]=='A' && table[2]=='C' && table[3]=='P')␊
301␉␉␉␉{␊
302␉␉␉␉␉struct acpi_2_fadt *fadt, *fadt_mod;␊
303␉␉␉␉␉fadt=(struct acpi_2_fadt *)rsdt_entries[i];␊
304␊
305␉␉␉␉␉DBG("FADT found @%x, Length %d\n",fadt, fadt->Length);␊
306␊
307␉␉␉␉␉if (!fadt || (uint32_t)fadt == 0xffffffff || fadt->Length>0x10000)␊
308␉␉␉␉␉{␊
309␉␉␉␉␉␉printf("FADT incorrect. Not modified\n");␊
310␉␉␉␉␉␉continue;␊
311␉␉␉␉␉}␊
312␉␉␉␉␉␊
313␉␉␉␉␉fadt_mod = patch_fadt(fadt, new_dsdt);␊
314␉␉␉␉␉rsdt_entries[i-dropoffset]=(uint32_t)fadt_mod;␊
315␉␉␉␉␉continue;␊
316␉␉␉␉}␊
317␉␉␉}␊
318␉␉␉DBG("\n");␊
319␊
320␉␉␉// Correct the checksum of RSDT␊
321␉␉␉rsdt_mod->Length-=4*dropoffset;␊
322␊
323␉␉␉DBG("RSDT: Original checksum %d, ", rsdt_mod->Checksum);␊
324␊
325␉␉␉rsdt_mod->Checksum=0;␊
326␉␉␉rsdt_mod->Checksum=256-checksum8(rsdt_mod,rsdt_mod->Length);␊
327␊
328␉␉␉DBG("New checksum %d at %x\n", rsdt_mod->Checksum,rsdt_mod);␊
329␉␉}␊
330␉␉else␊
331␉␉{␊
332␉␉␉rsdp_mod->RsdtAddress=0;␊
333␉␉␉printf("RSDT not found or RSDT incorrect\n");␊
334␉␉}␊
335␊
336␉␉if (version)␊
337␉␉{␊
338␉␉␉struct acpi_2_xsdt *xsdt, *xsdt_mod;␊
339␊
340␉␉␉// FIXME: handle 64-bit address correctly␊
341␊
342␉␉␉xsdt=(struct acpi_2_xsdt*) ((uint32_t)rsdp->XsdtAddress);␊
343␉␉␉DBG("XSDT @%x;%x, Length=%d\n", (uint32_t)(rsdp->XsdtAddress>>32),(uint32_t)rsdp->XsdtAddress,␊
344␉␉␉␉␉xsdt->Length);␊
345␉␉␉if (xsdt && (uint64_t)rsdp->XsdtAddress<0xffffffff && xsdt->Length<0x10000)␊
346␉␉␉{␊
347␉␉␉␉uint64_t *xsdt_entries;␊
348␉␉␉␉int xsdt_entries_num, i;␊
349␉␉␉␉int dropoffset=0;␊
350␉␉␉␉␊
351␉␉␉␉xsdt_mod=(struct acpi_2_xsdt*)AllocateKernelMemory(xsdt->Length); ␊
352␉␉␉␉memcpy(xsdt_mod, xsdt, xsdt->Length);␊
353␉␉␉␉rsdp_mod->XsdtAddress=(uint32_t)xsdt_mod;␊
354␉␉␉␉xsdt_entries_num=(xsdt_mod->Length-sizeof(struct acpi_2_xsdt))/8;␊
355␉␉␉␉xsdt_entries=(uint64_t *)(xsdt_mod+1);␊
356␉␉␉␉for (i=0;i<xsdt_entries_num;i++)␊
357␉␉␉␉{␊
358␉␉␉␉␉char *table=(char *)((uint32_t)(xsdt_entries[i]));␊
359␉␉␉␉␉if (!table)␊
360␉␉␉␉␉␉continue;␊
361␉␉␉␉␉xsdt_entries[i-dropoffset]=xsdt_entries[i];␊
362␉␉␉␉␉if (drop_ssdt && table[0]=='S' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
363␉␉␉␉␉{␊
364␉␉␉␉␉␉dropoffset++;␊
365␉␉␉␉␉␉continue;␊
366␉␉␉␉␉}␉␉␉␉␉␊
367␉␉␉␉␉if (table[0]=='D' && table[1]=='S' && table[2]=='D' && table[3]=='T')␊
368␉␉␉␉␉{␊
369␉␉␉␉␉␉DBG("DSDT found\n");␊
370␊
371␉␉␉␉␉␉xsdt_entries[i-dropoffset]=(uint32_t)new_dsdt;␊
372␊
373␉␉␉␉␉␉DBG("TABLE %c%c%c%c@%x,",table[0],table[1],table[2],table[3],xsdt_entries[i]);␊
374␉␉␉␉␉␉␊
375␉␉␉␉␉␉continue;␊
376␉␉␉␉␉}␊
377␉␉␉␉␉if (table[0]=='F' && table[1]=='A' && table[2]=='C' && table[3]=='P')␊
378␉␉␉␉␉{␊
379␉␉␉␉␉␉struct acpi_2_fadt *fadt, *fadt_mod;␊
380␉␉␉␉␉␉fadt=(struct acpi_2_fadt *)(uint32_t)xsdt_entries[i];␊
381␊
382␉␉␉␉␉␉DBG("FADT found @%x,%x, Length %d\n",(uint32_t)(xsdt_entries[i]>>32),fadt, ␊
383␉␉␉␉␉␉␉␉ fadt->Length);␊
384␊
385␉␉␉␉␉␉if (!fadt || (uint64_t)xsdt_entries[i] >= 0xffffffff || fadt->Length>0x10000)␊
386␉␉␉␉␉␉{␊
387␉␉␉␉␉␉␉verbose("FADT incorrect or after 4GB. Dropping XSDT\n");␊
388␉␉␉␉␉␉␉goto drop_xsdt;␊
389␉␉␉␉␉␉}␊
390␊
391␉␉␉␉␉␉fadt_mod = patch_fadt(fadt, new_dsdt);␊
392␉␉␉␉␉␉xsdt_entries[i-dropoffset]=(uint32_t)fadt_mod;␊
393␊
394␉␉␉␉␉␉DBG("TABLE %c%c%c%c@%x,",table[0],table[1],table[2],table[3],xsdt_entries[i]);␊
395␊
396␉␉␉␉␉␉continue;␊
397␉␉␉␉␉}␊
398␊
399␉␉␉␉␉DBG("TABLE %c%c%c%c@%x,",table[0],table[1],table[2],table[3],xsdt_entries[i]);␊
400␊
401␉␉␉␉}␊
402␊
403␉␉␉␉// Correct the checksum of XSDT␊
404␉␉␉␉xsdt_mod->Length-=8*dropoffset;␊
405␉␉␉␉xsdt_mod->Checksum=0;␊
406␉␉␉␉xsdt_mod->Checksum=256-checksum8(xsdt_mod,xsdt_mod->Length);␊
407␉␉␉}␊
408␉␉␉else␊
409␉␉␉{␊
410␉␉␉drop_xsdt:␊
411␊
412␉␉␉␉DBG("About to drop XSDT\n");␊
413␊
414␉␉␉␉/*FIXME: Now we just hope that if MacOS doesn't find XSDT it reverts to RSDT. ␊
415␉␉␉␉ * A Better strategy would be to generate␊
416␉␉␉␉ */␊
417␊
418␉␉␉␉rsdp_mod->XsdtAddress=0xffffffffffffffffLL;␊
419␉␉␉␉verbose("XSDT not found or XSDT incorrect\n");␊
420␉␉␉}␊
421␉␉}␊
422␊
423␉␉// Correct the checksum of RSDP ␊
424␊
425␉␉DBG("RSDP: Original checksum %d, ", rsdp_mod->Checksum);␊
426␊
427␉␉rsdp_mod->Checksum=0;␊
428␉␉rsdp_mod->Checksum=256-checksum8(rsdp_mod,20);␊
429␊
430␉␉DBG("New checksum %d\n", rsdp_mod->Checksum);␊
431␊
432␉␉if (version)␊
433␉␉{␊
434␉␉␉DBG("RSDP: Original extended checksum %d", rsdp_mod->ExtendedChecksum);␊
435␊
436␉␉␉rsdp_mod->ExtendedChecksum=0;␊
437␉␉␉rsdp_mod->ExtendedChecksum=256-checksum8(rsdp_mod,rsdp_mod->Length);␊
438␊
439␉␉␉DBG("New extended checksum %d\n", rsdp_mod->ExtendedChecksum);␊
440␊
441␉␉}␊
442␉␉␊
443␉␉verbose("Patched ACPI version %d DSDT\n", version+1);␊
444␉␉if (version)␊
445␉␉{␊
446␉/* XXX aserebln why uint32 cast if pointer is uint64 ? */␊
447␉␉␉acpi20_p = (uint32_t)rsdp_mod;␊
448␉␉␉addConfigurationTable(&gEfiAcpi20TableGuid, &acpi20_p, "ACPI_20");␊
449␉␉}␊
450␉␉else␊
451␉␉{␊
452␉/* XXX aserebln why uint32 cast if pointer is uint64 ? */␊
453␉␉␉acpi10_p = (uint32_t)rsdp_mod;␊
454␉␉␉addConfigurationTable(&gEfiAcpiTableGuid, &acpi10_p, "ACPI");␊
455␉␉}␊
456␉}␊
457#if DEBUG_DSDT␊
458␉printf("Press a key to continue... (DEBUG_DSDT)\n");␊
459␉getc();␊
460#endif␊
461␉return 1;␊
462}␊
463

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