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Kevin O'Connor84ad59a2008-07-04 05:47:26 -04001// Support for generating ACPI tables (on emulators)
Kevin O'Connor276d4a92008-06-11 22:47:01 -04002//
Kevin O'Connor2929c352009-07-25 13:48:27 -04003// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connor276d4a92008-06-11 22:47:01 -04004// Copyright (C) 2006 Fabrice Bellard
5//
Kevin O'Connorb1b7c2a2009-01-15 20:52:58 -05006// This file may be distributed under the terms of the GNU LGPLv3 license.
Kevin O'Connor276d4a92008-06-11 22:47:01 -04007
8#include "acpi.h" // struct rsdp_descriptor
9#include "util.h" // memcpy
Kevin O'Connor276d4a92008-06-11 22:47:01 -040010#include "pci.h" // pci_find_device
Kevin O'Connor9521e262008-07-04 13:04:29 -040011#include "biosvar.h" // GET_EBDA
Kevin O'Connor2ed2f582008-11-08 15:53:36 -050012#include "pci_ids.h" // PCI_VENDOR_ID_INTEL
13#include "pci_regs.h" // PCI_INTERRUPT_LINE
Kevin O'Connor276d4a92008-06-11 22:47:01 -040014
15
16/****************************************************/
17/* ACPI tables init */
18
19/* Table structure from Linux kernel (the ACPI tables are under the
20 BSD license) */
21
22#define ACPI_TABLE_HEADER_DEF /* ACPI common table header */ \
Kevin O'Connord10e4442009-03-01 12:41:20 -050023 u32 signature; /* ACPI signature (4 ASCII characters) */ \
24 u32 length; /* Length of table, in bytes, including header */ \
25 u8 revision; /* ACPI Specification minor version # */ \
26 u8 checksum; /* To make sum of entire table == 0 */ \
27 u8 oem_id [6]; /* OEM identification */ \
28 u8 oem_table_id [8]; /* OEM table identification */ \
29 u32 oem_revision; /* OEM revision number */ \
30 u8 asl_compiler_id [4]; /* ASL compiler vendor ID */ \
31 u32 asl_compiler_revision; /* ASL compiler revision number */
Kevin O'Connor276d4a92008-06-11 22:47:01 -040032
33
34struct acpi_table_header /* ACPI common table header */
35{
Kevin O'Connord10e4442009-03-01 12:41:20 -050036 ACPI_TABLE_HEADER_DEF
Kevin O'Connore97ca7b2009-06-21 09:10:28 -040037} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -040038
39/*
40 * ACPI 1.0 Root System Description Table (RSDT)
41 */
Kevin O'Connor9967ab72008-12-18 21:57:33 -050042#define RSDT_SIGNATURE 0x54445352 // RSDT
Kevin O'Connor276d4a92008-06-11 22:47:01 -040043struct rsdt_descriptor_rev1
44{
Kevin O'Connord10e4442009-03-01 12:41:20 -050045 ACPI_TABLE_HEADER_DEF /* ACPI common table header */
Kevin O'Connor2929c352009-07-25 13:48:27 -040046 u32 table_offset_entry[3]; /* Array of pointers to other */
Kevin O'Connord10e4442009-03-01 12:41:20 -050047 /* ACPI tables */
Kevin O'Connore97ca7b2009-06-21 09:10:28 -040048} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -040049
50/*
51 * ACPI 1.0 Firmware ACPI Control Structure (FACS)
52 */
Kevin O'Connor9967ab72008-12-18 21:57:33 -050053#define FACS_SIGNATURE 0x53434146 // FACS
Kevin O'Connor276d4a92008-06-11 22:47:01 -040054struct facs_descriptor_rev1
55{
Kevin O'Connord10e4442009-03-01 12:41:20 -050056 u32 signature; /* ACPI Signature */
57 u32 length; /* Length of structure, in bytes */
58 u32 hardware_signature; /* Hardware configuration signature */
59 u32 firmware_waking_vector; /* ACPI OS waking vector */
60 u32 global_lock; /* Global Lock */
61 u32 S4bios_f : 1; /* Indicates if S4BIOS support is present */
62 u32 reserved1 : 31; /* Must be 0 */
63 u8 resverved3 [40]; /* Reserved - must be zero */
Kevin O'Connore97ca7b2009-06-21 09:10:28 -040064} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -040065
66
67/*
68 * ACPI 1.0 Fixed ACPI Description Table (FADT)
69 */
Kevin O'Connor9967ab72008-12-18 21:57:33 -050070#define FACP_SIGNATURE 0x50434146 // FACP
Kevin O'Connor276d4a92008-06-11 22:47:01 -040071struct fadt_descriptor_rev1
72{
Kevin O'Connord10e4442009-03-01 12:41:20 -050073 ACPI_TABLE_HEADER_DEF /* ACPI common table header */
74 u32 firmware_ctrl; /* Physical address of FACS */
75 u32 dsdt; /* Physical address of DSDT */
76 u8 model; /* System Interrupt Model */
77 u8 reserved1; /* Reserved */
78 u16 sci_int; /* System vector of SCI interrupt */
79 u32 smi_cmd; /* Port address of SMI command port */
80 u8 acpi_enable; /* Value to write to smi_cmd to enable ACPI */
81 u8 acpi_disable; /* Value to write to smi_cmd to disable ACPI */
82 u8 S4bios_req; /* Value to write to SMI CMD to enter S4BIOS state */
83 u8 reserved2; /* Reserved - must be zero */
84 u32 pm1a_evt_blk; /* Port address of Power Mgt 1a acpi_event Reg Blk */
85 u32 pm1b_evt_blk; /* Port address of Power Mgt 1b acpi_event Reg Blk */
86 u32 pm1a_cnt_blk; /* Port address of Power Mgt 1a Control Reg Blk */
87 u32 pm1b_cnt_blk; /* Port address of Power Mgt 1b Control Reg Blk */
88 u32 pm2_cnt_blk; /* Port address of Power Mgt 2 Control Reg Blk */
89 u32 pm_tmr_blk; /* Port address of Power Mgt Timer Ctrl Reg Blk */
90 u32 gpe0_blk; /* Port addr of General Purpose acpi_event 0 Reg Blk */
91 u32 gpe1_blk; /* Port addr of General Purpose acpi_event 1 Reg Blk */
92 u8 pm1_evt_len; /* Byte length of ports at pm1_x_evt_blk */
93 u8 pm1_cnt_len; /* Byte length of ports at pm1_x_cnt_blk */
94 u8 pm2_cnt_len; /* Byte Length of ports at pm2_cnt_blk */
95 u8 pm_tmr_len; /* Byte Length of ports at pm_tm_blk */
96 u8 gpe0_blk_len; /* Byte Length of ports at gpe0_blk */
97 u8 gpe1_blk_len; /* Byte Length of ports at gpe1_blk */
98 u8 gpe1_base; /* Offset in gpe model where gpe1 events start */
99 u8 reserved3; /* Reserved */
100 u16 plvl2_lat; /* Worst case HW latency to enter/exit C2 state */
101 u16 plvl3_lat; /* Worst case HW latency to enter/exit C3 state */
102 u16 flush_size; /* Size of area read to flush caches */
103 u16 flush_stride; /* Stride used in flushing caches */
104 u8 duty_offset; /* Bit location of duty cycle field in p_cnt reg */
105 u8 duty_width; /* Bit width of duty cycle field in p_cnt reg */
106 u8 day_alrm; /* Index to day-of-month alarm in RTC CMOS RAM */
107 u8 mon_alrm; /* Index to month-of-year alarm in RTC CMOS RAM */
108 u8 century; /* Index to century in RTC CMOS RAM */
109 u8 reserved4; /* Reserved */
110 u8 reserved4a; /* Reserved */
111 u8 reserved4b; /* Reserved */
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400112#if 0
Kevin O'Connord10e4442009-03-01 12:41:20 -0500113 u32 wb_invd : 1; /* The wbinvd instruction works properly */
114 u32 wb_invd_flush : 1; /* The wbinvd flushes but does not invalidate */
115 u32 proc_c1 : 1; /* All processors support C1 state */
116 u32 plvl2_up : 1; /* C2 state works on MP system */
117 u32 pwr_button : 1; /* Power button is handled as a generic feature */
118 u32 sleep_button : 1; /* Sleep button is handled as a generic feature, or not present */
119 u32 fixed_rTC : 1; /* RTC wakeup stat not in fixed register space */
120 u32 rtcs4 : 1; /* RTC wakeup stat not possible from S4 */
121 u32 tmr_val_ext : 1; /* The tmr_val width is 32 bits (0 = 24 bits) */
122 u32 reserved5 : 23; /* Reserved - must be zero */
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400123#else
Kevin O'Connord10e4442009-03-01 12:41:20 -0500124 u32 flags;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400125#endif
Kevin O'Connore97ca7b2009-06-21 09:10:28 -0400126} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400127
128/*
129 * MADT values and structures
130 */
131
132/* Values for MADT PCATCompat */
133
134#define DUAL_PIC 0
135#define MULTIPLE_APIC 1
136
137
138/* Master MADT */
139
Kevin O'Connor9967ab72008-12-18 21:57:33 -0500140#define APIC_SIGNATURE 0x43495041 // APIC
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400141struct multiple_apic_table
142{
Kevin O'Connord10e4442009-03-01 12:41:20 -0500143 ACPI_TABLE_HEADER_DEF /* ACPI common table header */
144 u32 local_apic_address; /* Physical address of local APIC */
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400145#if 0
Kevin O'Connord10e4442009-03-01 12:41:20 -0500146 u32 PCATcompat : 1; /* A one indicates system also has dual 8259s */
147 u32 reserved1 : 31;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400148#else
Kevin O'Connord10e4442009-03-01 12:41:20 -0500149 u32 flags;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400150#endif
Kevin O'Connore97ca7b2009-06-21 09:10:28 -0400151} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400152
153
154/* Values for Type in APIC_HEADER_DEF */
155
156#define APIC_PROCESSOR 0
157#define APIC_IO 1
158#define APIC_XRUPT_OVERRIDE 2
159#define APIC_NMI 3
160#define APIC_LOCAL_NMI 4
161#define APIC_ADDRESS_OVERRIDE 5
162#define APIC_IO_SAPIC 6
163#define APIC_LOCAL_SAPIC 7
164#define APIC_XRUPT_SOURCE 8
165#define APIC_RESERVED 9 /* 9 and greater are reserved */
166
167/*
168 * MADT sub-structures (Follow MULTIPLE_APIC_DESCRIPTION_TABLE)
169 */
Kevin O'Connord10e4442009-03-01 12:41:20 -0500170#define APIC_HEADER_DEF /* Common APIC sub-structure header */\
171 u8 type; \
172 u8 length;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400173
174/* Sub-structures for MADT */
175
176struct madt_processor_apic
177{
Kevin O'Connord10e4442009-03-01 12:41:20 -0500178 APIC_HEADER_DEF
179 u8 processor_id; /* ACPI processor id */
180 u8 local_apic_id; /* Processor's local APIC id */
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400181#if 0
Kevin O'Connord10e4442009-03-01 12:41:20 -0500182 u32 processor_enabled: 1; /* Processor is usable if set */
183 u32 reserved2 : 31; /* Reserved, must be zero */
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400184#else
Kevin O'Connord10e4442009-03-01 12:41:20 -0500185 u32 flags;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400186#endif
Kevin O'Connore97ca7b2009-06-21 09:10:28 -0400187} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400188
189struct madt_io_apic
190{
Kevin O'Connord10e4442009-03-01 12:41:20 -0500191 APIC_HEADER_DEF
192 u8 io_apic_id; /* I/O APIC ID */
193 u8 reserved; /* Reserved - must be zero */
194 u32 address; /* APIC physical address */
195 u32 interrupt; /* Global system interrupt where INTI
196 * lines start */
Kevin O'Connore97ca7b2009-06-21 09:10:28 -0400197} PACKED;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400198
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500199#if CONFIG_KVM
200/* IRQs 5,9,10,11 */
201#define PCI_ISA_IRQ_MASK 0x0e20
202#else
203#define PCI_ISA_IRQ_MASK 0x0000
204#endif
205
206struct madt_intsrcovr {
207 APIC_HEADER_DEF
208 u8 bus;
209 u8 source;
210 u32 gsi;
211 u16 flags;
212} PACKED;
213
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400214#include "acpi-dsdt.hex"
215
216static inline u16 cpu_to_le16(u16 x)
217{
218 return x;
219}
220
221static inline u32 cpu_to_le32(u32 x)
222{
223 return x;
224}
225
Kevin O'Connor2929c352009-07-25 13:48:27 -0400226static void
227build_header(struct acpi_table_header *h, u32 sig, int len, u8 rev
228 , struct rsdt_descriptor_rev1 *rsdt)
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400229{
Kevin O'Connor9967ab72008-12-18 21:57:33 -0500230 h->signature = sig;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400231 h->length = cpu_to_le32(len);
232 h->revision = rev;
Kevin O'Connor6cb8ba92008-08-17 11:03:24 -0400233 memcpy(h->oem_id, CONFIG_APPNAME6, 6);
234 memcpy(h->oem_table_id, CONFIG_APPNAME4, 4);
235 memcpy(h->asl_compiler_id, CONFIG_APPNAME4, 4);
Kevin O'Connor9967ab72008-12-18 21:57:33 -0500236 memcpy(h->oem_table_id + 4, (void*)&sig, 4);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400237 h->oem_revision = cpu_to_le32(1);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400238 h->asl_compiler_revision = cpu_to_le32(1);
Kevin O'Connor523e5a92009-07-04 13:46:33 -0400239 h->checksum -= checksum(h, len);
Kevin O'Connor2929c352009-07-25 13:48:27 -0400240
241 // Add to rsdt table
242 if (!rsdt)
243 return;
244 if (rsdt->length >= sizeof(*rsdt)) {
245 dprintf(1, "No more room for rsdt entry!\n");
246 return;
247 }
248 u32 *p = (void*)rsdt + rsdt->length;
249 *p = (u32)h;
250 rsdt->length += sizeof(*p);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400251}
252
Kevin O'Connor2929c352009-07-25 13:48:27 -0400253static void
254build_fadt(struct rsdt_descriptor_rev1 *rsdt, int bdf)
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400255{
Kevin O'Connor2929c352009-07-25 13:48:27 -0400256 struct fadt_descriptor_rev1 *fadt = malloc_high(sizeof(*fadt));
Kevin O'Connor415d4292009-08-30 19:19:31 -0400257 struct facs_descriptor_rev1 *facs = memalign_high(64, sizeof(*facs));
Kevin O'Connor2929c352009-07-25 13:48:27 -0400258 void *dsdt = malloc_high(sizeof(AmlCode));
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400259
Kevin O'Connor2929c352009-07-25 13:48:27 -0400260 if (!fadt || !facs || !dsdt) {
261 dprintf(1, "Not enough memory for fadt!\n");
262 return;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400263 }
264
Kevin O'Connor2929c352009-07-25 13:48:27 -0400265 /* FACS */
Kevin O'Connor2929c352009-07-25 13:48:27 -0400266 memset(facs, 0, sizeof(*facs));
267 facs->signature = FACS_SIGNATURE;
268 facs->length = cpu_to_le32(sizeof(*facs));
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400269
Kevin O'Connor2929c352009-07-25 13:48:27 -0400270 /* DSDT */
271 memcpy(dsdt, AmlCode, sizeof(AmlCode));
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400272
273 /* FADT */
274 memset(fadt, 0, sizeof(*fadt));
Kevin O'Connor2929c352009-07-25 13:48:27 -0400275 fadt->firmware_ctrl = cpu_to_le32((u32)facs);
276 fadt->dsdt = cpu_to_le32((u32)dsdt);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400277 fadt->model = 1;
278 fadt->reserved1 = 0;
Kevin O'Connorbe19cdc2008-11-09 15:33:47 -0500279 int pm_sci_int = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400280 fadt->sci_int = cpu_to_le16(pm_sci_int);
Kevin O'Connore682cbc2008-12-06 23:11:56 -0500281 fadt->smi_cmd = cpu_to_le32(PORT_SMI_CMD);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400282 fadt->acpi_enable = 0xf1;
283 fadt->acpi_disable = 0xf0;
Kevin O'Connore682cbc2008-12-06 23:11:56 -0500284 fadt->pm1a_evt_blk = cpu_to_le32(PORT_ACPI_PM_BASE);
285 fadt->pm1a_cnt_blk = cpu_to_le32(PORT_ACPI_PM_BASE + 0x04);
286 fadt->pm_tmr_blk = cpu_to_le32(PORT_ACPI_PM_BASE + 0x08);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400287 fadt->pm1_evt_len = 4;
288 fadt->pm1_cnt_len = 2;
289 fadt->pm_tmr_len = 4;
290 fadt->plvl2_lat = cpu_to_le16(0xfff); // C2 state not supported
291 fadt->plvl3_lat = cpu_to_le16(0xfff); // C3 state not supported
292 /* WBINVD + PROC_C1 + PWR_BUTTON + SLP_BUTTON + FIX_RTC */
293 fadt->flags = cpu_to_le32((1 << 0) | (1 << 2) | (1 << 4) | (1 << 5) | (1 << 6));
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400294
Kevin O'Connor2929c352009-07-25 13:48:27 -0400295 build_header((void*)fadt, FACP_SIGNATURE, sizeof(*fadt), 1, rsdt);
296}
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400297
Kevin O'Connor2929c352009-07-25 13:48:27 -0400298static void
299build_madt(struct rsdt_descriptor_rev1 *rsdt)
300{
301 int smp_cpus = CountCPUs;
302 int madt_size = (sizeof(struct multiple_apic_table)
303 + sizeof(struct madt_processor_apic) * smp_cpus
304 + sizeof(struct madt_io_apic)
305 + sizeof(struct madt_intsrcovr) * 16);
306 struct multiple_apic_table *madt = malloc_high(madt_size);
307 if (!madt) {
308 dprintf(1, "Not enough memory for madt!\n");
309 return;
310 }
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500311 memset(madt, 0, madt_size);
312 madt->local_apic_address = cpu_to_le32(BUILD_APIC_ADDR);
313 madt->flags = cpu_to_le32(1);
Kevin O'Connor2929c352009-07-25 13:48:27 -0400314 struct madt_processor_apic *apic = (void*)&madt[1];
315 int i;
316 for (i=0; i<smp_cpus; i++) {
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500317 apic->type = APIC_PROCESSOR;
318 apic->length = sizeof(*apic);
319 apic->processor_id = i;
320 apic->local_apic_id = i;
321 apic->flags = cpu_to_le32(1);
322 apic++;
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400323 }
Kevin O'Connor2929c352009-07-25 13:48:27 -0400324 struct madt_io_apic *io_apic = (void*)apic;
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500325 io_apic->type = APIC_IO;
326 io_apic->length = sizeof(*io_apic);
327 io_apic->io_apic_id = smp_cpus;
328 io_apic->address = cpu_to_le32(BUILD_IOAPIC_ADDR);
329 io_apic->interrupt = cpu_to_le32(0);
330
Kevin O'Connord10e4442009-03-01 12:41:20 -0500331 struct madt_intsrcovr *intsrcovr = (void*)&io_apic[1];
Kevin O'Connorb64db302009-07-29 19:20:03 -0400332 if (irq0override) {
333 memset(intsrcovr, 0, sizeof(*intsrcovr));
334 intsrcovr->type = APIC_XRUPT_OVERRIDE;
335 intsrcovr->length = sizeof(*intsrcovr);
336 intsrcovr->source = 0;
337 intsrcovr->gsi = 2;
338 intsrcovr->flags = 0; /* conforms to bus specifications */
339 intsrcovr++;
340 }
341 for (i = 1; i < 16; i++) {
Kevin O'Connord10e4442009-03-01 12:41:20 -0500342 if (!(PCI_ISA_IRQ_MASK & (1 << i)))
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500343 /* No need for a INT source override structure. */
344 continue;
Kevin O'Connord10e4442009-03-01 12:41:20 -0500345 memset(intsrcovr, 0, sizeof(*intsrcovr));
346 intsrcovr->type = APIC_XRUPT_OVERRIDE;
347 intsrcovr->length = sizeof(*intsrcovr);
348 intsrcovr->source = i;
349 intsrcovr->gsi = i;
350 intsrcovr->flags = 0xd; /* active high, level triggered */
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500351 intsrcovr++;
Kevin O'Connor7061eb62009-01-04 21:48:22 -0500352 }
353
Kevin O'Connor2929c352009-07-25 13:48:27 -0400354 build_header((void*)madt, APIC_SIGNATURE, (void*)intsrcovr - (void*)madt
355 , 1, rsdt);
356}
357
358#define SSDT_SIGNATURE 0x54445353 // SSDT
359static void
360build_ssdt(struct rsdt_descriptor_rev1 *rsdt)
361{
362 int smp_cpus = CountCPUs;
363 int acpi_cpus = smp_cpus > 0xff ? 0xff : smp_cpus;
364 // calculate the length of processor block and scope block
365 // excluding PkgLength
366 int cpu_length = 13 * acpi_cpus + 4;
367
368 int length = sizeof(struct acpi_table_header) + 3 + cpu_length;
369 u8 *ssdt = malloc_high(length);
370 if (! ssdt) {
371 dprintf(1, "No space for ssdt!\n");
372 return;
373 }
374
375 u8 *ssdt_ptr = ssdt;
376 ssdt_ptr[9] = 0; // checksum;
377 ssdt_ptr += sizeof(struct acpi_table_header);
378
379 // build processor scope header
380 *(ssdt_ptr++) = 0x10; // ScopeOp
381 if (cpu_length <= 0x3e) {
382 *(ssdt_ptr++) = cpu_length + 1;
383 } else {
384 *(ssdt_ptr++) = 0x7F;
385 *(ssdt_ptr++) = (cpu_length + 2) >> 6;
386 }
387 *(ssdt_ptr++) = '_'; // Name
388 *(ssdt_ptr++) = 'P';
389 *(ssdt_ptr++) = 'R';
390 *(ssdt_ptr++) = '_';
391
392 // build object for each processor
393 int i;
394 for (i=0; i<acpi_cpus; i++) {
395 *(ssdt_ptr++) = 0x5B; // ProcessorOp
396 *(ssdt_ptr++) = 0x83;
397 *(ssdt_ptr++) = 0x0B; // Length
398 *(ssdt_ptr++) = 'C'; // Name (CPUxx)
399 *(ssdt_ptr++) = 'P';
400 if ((i & 0xf0) != 0)
401 *(ssdt_ptr++) = (i >> 4) < 0xa ? (i >> 4) + '0' : (i >> 4) + 'A' - 0xa;
402 else
403 *(ssdt_ptr++) = 'U';
404 *(ssdt_ptr++) = (i & 0xf) < 0xa ? (i & 0xf) + '0' : (i & 0xf) + 'A' - 0xa;
405 *(ssdt_ptr++) = i;
406 *(ssdt_ptr++) = 0x10; // Processor block address
407 *(ssdt_ptr++) = 0xb0;
408 *(ssdt_ptr++) = 0;
409 *(ssdt_ptr++) = 0;
410 *(ssdt_ptr++) = 6; // Processor block length
411 }
412
413 build_header((void*)ssdt, SSDT_SIGNATURE, ssdt_ptr - ssdt, 1, rsdt);
414}
415
416struct rsdp_descriptor *RsdpAddr;
417
418void
419acpi_bios_init(void)
420{
421 if (! CONFIG_ACPI)
422 return;
423
424 dprintf(3, "init ACPI tables\n");
425
426 // This code is hardcoded for PIIX4 Power Management device.
427 int bdf = pci_find_device(PCI_VENDOR_ID_INTEL
428 , PCI_DEVICE_ID_INTEL_82371AB_3);
429 if (bdf < 0)
430 // Device not found
431 return;
432
433 // Create initial rsdt table
Kevin O'Connor415d4292009-08-30 19:19:31 -0400434 struct rsdp_descriptor *rsdp = malloc_fseg(sizeof(*rsdp));
Kevin O'Connor2929c352009-07-25 13:48:27 -0400435 struct rsdt_descriptor_rev1 *rsdt = malloc_high(sizeof(*rsdt));
Kevin O'Connor415d4292009-08-30 19:19:31 -0400436 if (!rsdp || !rsdt) {
437 dprintf(1, "Not enough memory for acpi rsdp/rsdt table!\n");
Kevin O'Connor2929c352009-07-25 13:48:27 -0400438 return;
439 }
440 memset(rsdt, 0, sizeof(*rsdt));
441 rsdt->length = offsetof(struct rsdt_descriptor_rev1, table_offset_entry[0]);
442
443 // Add tables
444 build_fadt(rsdt, bdf);
445 build_ssdt(rsdt);
446 build_madt(rsdt);
447
448 build_header((void*)rsdt, RSDT_SIGNATURE, rsdt->length, 1, NULL);
449
450 // Build rsdp pointer table
Kevin O'Connor2929c352009-07-25 13:48:27 -0400451 memset(rsdp, 0, sizeof(*rsdp));
452 rsdp->signature = RSDP_SIGNATURE;
453 memcpy(rsdp->oem_id, CONFIG_APPNAME6, 6);
454 rsdp->rsdt_physical_address = cpu_to_le32((u32)rsdt);
455 rsdp->checksum -= checksum(rsdp, 20);
456 RsdpAddr = rsdp;
457 dprintf(1, "ACPI tables: RSDP=%p RSDT=%p\n", rsdp, rsdt);
Kevin O'Connor276d4a92008-06-11 22:47:01 -0400458}
Kevin O'Connor9967ab72008-12-18 21:57:33 -0500459
460u32
461find_resume_vector()
462{
463 dprintf(4, "rsdp=%p\n", RsdpAddr);
464 if (!RsdpAddr || RsdpAddr->signature != RSDP_SIGNATURE)
465 return 0;
466 struct rsdt_descriptor_rev1 *rsdt = (void*)RsdpAddr->rsdt_physical_address;
467 dprintf(4, "rsdt=%p\n", rsdt);
468 if (!rsdt || rsdt->signature != RSDT_SIGNATURE)
469 return 0;
470 void *end = (void*)rsdt + rsdt->length;
471 int i;
472 for (i=0; (void*)&rsdt->table_offset_entry[i] < end; i++) {
473 struct fadt_descriptor_rev1 *fadt = (void*)rsdt->table_offset_entry[i];
474 if (!fadt || fadt->signature != FACP_SIGNATURE)
475 continue;
476 dprintf(4, "fadt=%p\n", fadt);
477 struct facs_descriptor_rev1 *facs = (void*)fadt->firmware_ctrl;
478 dprintf(4, "facs=%p\n", facs);
479 if (! facs || facs->signature != FACS_SIGNATURE)
480 return 0;
481 // Found it.
482 dprintf(4, "resume addr=%d\n", facs->firmware_waking_vector);
483 return facs->firmware_waking_vector;
484 }
485 return 0;
486}