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git.ipfire.org Git - people/ms/u-boot.git/blob - arch/x86/cpu/ivybridge/sdram.c
2 * Copyright (c) 2011 The Chromium OS Authors.
3 * (C) Copyright 2010,2011
4 * Graeme Russ, <graeme.russ@gmail.com>
6 * Portions from Coreboot mainboard/google/link/romstage.c
7 * Copyright (C) 2007-2010 coresystems GmbH
8 * Copyright (C) 2011 Google Inc.
10 * SPDX-License-Identifier: GPL-2.0
20 #include <spi_flash.h>
23 #include <asm/processor.h>
25 #include <asm/global_data.h>
26 #include <asm/intel_regs.h>
27 #include <asm/mrccache.h>
28 #include <asm/mrc_common.h>
31 #include <asm/report_platform.h>
32 #include <asm/arch/me.h>
33 #include <asm/arch/pei_data.h>
34 #include <asm/arch/pch.h>
36 #include <asm/arch/sandybridge.h>
38 DECLARE_GLOBAL_DATA_PTR
;
40 #define CMOS_OFFSET_MRC_SEED 152
41 #define CMOS_OFFSET_MRC_SEED_S3 156
42 #define CMOS_OFFSET_MRC_SEED_CHK 160
44 ulong
board_get_usable_ram_top(ulong total_size
)
46 return mrc_common_board_get_usable_ram_top(total_size
);
49 int dram_init_banksize(void)
51 mrc_common_dram_init_banksize();
56 static int read_seed_from_cmos(struct pei_data
*pei_data
)
58 u16 c1
, c2
, checksum
, seed_checksum
;
62 ret
= uclass_get_device(UCLASS_RTC
, 0, &dev
);
64 debug("Cannot find RTC: err=%d\n", ret
);
69 * Read scrambler seeds from CMOS RAM. We don't want to store them in
70 * SPI flash since they change on every boot and that would wear down
71 * the flash too much. So we store these in CMOS and the large MRC
74 ret
= rtc_read32(dev
, CMOS_OFFSET_MRC_SEED
, &pei_data
->scrambler_seed
);
76 ret
= rtc_read32(dev
, CMOS_OFFSET_MRC_SEED_S3
,
77 &pei_data
->scrambler_seed_s3
);
80 debug("Failed to read from RTC %s\n", dev
->name
);
84 debug("Read scrambler seed 0x%08x from CMOS 0x%02x\n",
85 pei_data
->scrambler_seed
, CMOS_OFFSET_MRC_SEED
);
86 debug("Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n",
87 pei_data
->scrambler_seed_s3
, CMOS_OFFSET_MRC_SEED_S3
);
89 /* Compute seed checksum and compare */
90 c1
= compute_ip_checksum((u8
*)&pei_data
->scrambler_seed
,
92 c2
= compute_ip_checksum((u8
*)&pei_data
->scrambler_seed_s3
,
94 checksum
= add_ip_checksums(sizeof(u32
), c1
, c2
);
96 seed_checksum
= rtc_read8(dev
, CMOS_OFFSET_MRC_SEED_CHK
);
97 seed_checksum
|= rtc_read8(dev
, CMOS_OFFSET_MRC_SEED_CHK
+ 1) << 8;
99 if (checksum
!= seed_checksum
) {
100 debug("%s: invalid seed checksum\n", __func__
);
101 pei_data
->scrambler_seed
= 0;
102 pei_data
->scrambler_seed_s3
= 0;
109 static int prepare_mrc_cache(struct pei_data
*pei_data
)
111 struct mrc_data_container
*mrc_cache
;
112 struct mrc_region entry
;
115 ret
= read_seed_from_cmos(pei_data
);
118 ret
= mrccache_get_region(NULL
, &entry
);
121 mrc_cache
= mrccache_find_current(&entry
);
125 pei_data
->mrc_input
= mrc_cache
->data
;
126 pei_data
->mrc_input_len
= mrc_cache
->data_size
;
127 debug("%s: at %p, size %x checksum %04x\n", __func__
,
128 pei_data
->mrc_input
, pei_data
->mrc_input_len
,
129 mrc_cache
->checksum
);
134 static int write_seeds_to_cmos(struct pei_data
*pei_data
)
136 u16 c1
, c2
, checksum
;
140 ret
= uclass_get_device(UCLASS_RTC
, 0, &dev
);
142 debug("Cannot find RTC: err=%d\n", ret
);
146 /* Save the MRC seed values to CMOS */
147 rtc_write32(dev
, CMOS_OFFSET_MRC_SEED
, pei_data
->scrambler_seed
);
148 debug("Save scrambler seed 0x%08x to CMOS 0x%02x\n",
149 pei_data
->scrambler_seed
, CMOS_OFFSET_MRC_SEED
);
151 rtc_write32(dev
, CMOS_OFFSET_MRC_SEED_S3
, pei_data
->scrambler_seed_s3
);
152 debug("Save s3 scrambler seed 0x%08x to CMOS 0x%02x\n",
153 pei_data
->scrambler_seed_s3
, CMOS_OFFSET_MRC_SEED_S3
);
155 /* Save a simple checksum of the seed values */
156 c1
= compute_ip_checksum((u8
*)&pei_data
->scrambler_seed
,
158 c2
= compute_ip_checksum((u8
*)&pei_data
->scrambler_seed_s3
,
160 checksum
= add_ip_checksums(sizeof(u32
), c1
, c2
);
162 rtc_write8(dev
, CMOS_OFFSET_MRC_SEED_CHK
, checksum
& 0xff);
163 rtc_write8(dev
, CMOS_OFFSET_MRC_SEED_CHK
+ 1, (checksum
>> 8) & 0xff);
168 /* Use this hook to save our SDRAM parameters */
169 int misc_init_r(void)
173 ret
= mrccache_save();
175 printf("Unable to save MRC data: %d\n", ret
);
180 static void post_system_agent_init(struct udevice
*dev
, struct udevice
*me_dev
,
181 struct pei_data
*pei_data
)
186 * Send ME init done for SandyBridge here. This is done inside the
187 * SystemAgent binary on IvyBridge
189 dm_pci_read_config16(dev
, PCI_DEVICE_ID
, &done
);
190 done
&= BASE_REV_MASK
;
191 if (BASE_REV_SNB
== done
)
192 intel_early_me_init_done(dev
, me_dev
, ME_INIT_STATUS_SUCCESS
);
194 intel_me_status(me_dev
);
196 /* If PCIe init is skipped, set the PEG clock gating */
197 if (!pei_data
->pcie_init
)
198 setbits_le32(MCHBAR_REG(0x7010), 1);
201 static int recovery_mode_enabled(void)
206 static int copy_spd(struct udevice
*dev
, struct pei_data
*peid
)
211 ret
= mrc_locate_spd(dev
, sizeof(peid
->spd_data
[0]), &data
);
213 debug("%s: Could not locate SPD (ret=%d)\n", __func__
, ret
);
217 memcpy(peid
->spd_data
[0], data
, sizeof(peid
->spd_data
[0]));
223 * sdram_find() - Find available memory
225 * This is a bit complicated since on x86 there are system memory holes all
226 * over the place. We create a list of available memory blocks
228 * @dev: Northbridge device
230 static int sdram_find(struct udevice
*dev
)
232 struct memory_info
*info
= &gd
->arch
.meminfo
;
233 uint32_t tseg_base
, uma_size
, tolud
;
234 uint64_t tom
, me_base
, touud
;
235 uint64_t uma_memory_base
= 0;
236 unsigned long long tomk
;
240 /* Total Memory 2GB example:
242 * 00000000 0000MB-1992MB 1992MB RAM (writeback)
243 * 7c800000 1992MB-2000MB 8MB TSEG (SMRR)
244 * 7d000000 2000MB-2002MB 2MB GFX GTT (uncached)
245 * 7d200000 2002MB-2034MB 32MB GFX UMA (uncached)
246 * 7f200000 2034MB TOLUD
247 * 7f800000 2040MB MEBASE
248 * 7f800000 2040MB-2048MB 8MB ME UMA (uncached)
249 * 80000000 2048MB TOM
250 * 100000000 4096MB-4102MB 6MB RAM (writeback)
252 * Total Memory 4GB example:
254 * 00000000 0000MB-2768MB 2768MB RAM (writeback)
255 * ad000000 2768MB-2776MB 8MB TSEG (SMRR)
256 * ad800000 2776MB-2778MB 2MB GFX GTT (uncached)
257 * ada00000 2778MB-2810MB 32MB GFX UMA (uncached)
258 * afa00000 2810MB TOLUD
259 * ff800000 4088MB MEBASE
260 * ff800000 4088MB-4096MB 8MB ME UMA (uncached)
261 * 100000000 4096MB TOM
262 * 100000000 4096MB-5374MB 1278MB RAM (writeback)
263 * 14fe00000 5368MB TOUUD
266 /* Top of Upper Usable DRAM, including remap */
267 dm_pci_read_config32(dev
, TOUUD
+ 4, &val
);
268 touud
= (uint64_t)val
<< 32;
269 dm_pci_read_config32(dev
, TOUUD
, &val
);
272 /* Top of Lower Usable DRAM */
273 dm_pci_read_config32(dev
, TOLUD
, &tolud
);
275 /* Top of Memory - does not account for any UMA */
276 dm_pci_read_config32(dev
, 0xa4, &val
);
277 tom
= (uint64_t)val
<< 32;
278 dm_pci_read_config32(dev
, 0xa0, &val
);
281 debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud
, tolud
, tom
);
283 /* ME UMA needs excluding if total memory <4GB */
284 dm_pci_read_config32(dev
, 0x74, &val
);
285 me_base
= (uint64_t)val
<< 32;
286 dm_pci_read_config32(dev
, 0x70, &val
);
289 debug("MEBASE %llx\n", me_base
);
291 /* TODO: Get rid of all this shifting by 10 bits */
293 if (me_base
== tolud
) {
294 /* ME is from MEBASE-TOM */
295 uma_size
= (tom
- me_base
) >> 10;
296 /* Increment TOLUD to account for ME as RAM */
297 tolud
+= uma_size
<< 10;
298 /* UMA starts at old TOLUD */
299 uma_memory_base
= tomk
* 1024ULL;
300 debug("ME UMA base %llx size %uM\n", me_base
, uma_size
>> 10);
303 /* Graphics memory comes next */
304 dm_pci_read_config16(dev
, GGC
, &ggc
);
306 debug("IGD decoded, subtracting ");
308 /* Graphics memory */
309 uma_size
= ((ggc
>> 3) & 0x1f) * 32 * 1024ULL;
310 debug("%uM UMA", uma_size
>> 10);
312 uma_memory_base
= tomk
* 1024ULL;
314 /* GTT Graphics Stolen Memory Size (GGMS) */
315 uma_size
= ((ggc
>> 8) & 0x3) * 1024ULL;
317 uma_memory_base
= tomk
* 1024ULL;
318 debug(" and %uM GTT\n", uma_size
>> 10);
321 /* Calculate TSEG size from its base which must be below GTT */
322 dm_pci_read_config32(dev
, 0xb8, &tseg_base
);
323 uma_size
= (uma_memory_base
- tseg_base
) >> 10;
325 uma_memory_base
= tomk
* 1024ULL;
326 debug("TSEG base 0x%08x size %uM\n", tseg_base
, uma_size
>> 10);
328 debug("Available memory below 4GB: %lluM\n", tomk
>> 10);
330 /* Report the memory regions */
331 mrc_add_memory_area(info
, 1 << 20, 2 << 28);
332 mrc_add_memory_area(info
, (2 << 28) + (2 << 20), 4 << 28);
333 mrc_add_memory_area(info
, (4 << 28) + (2 << 20), tseg_base
);
334 mrc_add_memory_area(info
, 1ULL << 32, touud
);
336 /* Add MTRRs for memory */
337 mtrr_add_request(MTRR_TYPE_WRBACK
, 0, 2ULL << 30);
338 mtrr_add_request(MTRR_TYPE_WRBACK
, 2ULL << 30, 512 << 20);
339 mtrr_add_request(MTRR_TYPE_WRBACK
, 0xaULL
<< 28, 256 << 20);
340 mtrr_add_request(MTRR_TYPE_UNCACHEABLE
, tseg_base
, 16 << 20);
341 mtrr_add_request(MTRR_TYPE_UNCACHEABLE
, tseg_base
+ (16 << 20),
345 * If >= 4GB installed then memory from TOLUD to 4GB
346 * is remapped above TOM, TOUUD will account for both
348 if (touud
> (1ULL << 32ULL)) {
349 debug("Available memory above 4GB: %lluM\n",
350 (touud
>> 20) - 4096);
356 static void rcba_config(void)
359 * GFX INTA -> PIRQA (MSI)
360 * D28IP_P3IP WLAN INTA -> PIRQB
361 * D29IP_E1P EHCI1 INTA -> PIRQD
362 * D26IP_E2P EHCI2 INTA -> PIRQF
363 * D31IP_SIP SATA INTA -> PIRQF (MSI)
364 * D31IP_SMIP SMBUS INTB -> PIRQH
365 * D31IP_TTIP THRT INTC -> PIRQA
366 * D27IP_ZIP HDA INTA -> PIRQA (MSI)
368 * TRACKPAD -> PIRQE (Edge Triggered)
369 * TOUCHSCREEN -> PIRQG (Edge Triggered)
372 /* Device interrupt pin register (board specific) */
373 writel((INTC
<< D31IP_TTIP
) | (NOINT
<< D31IP_SIP2
) |
374 (INTB
<< D31IP_SMIP
) | (INTA
<< D31IP_SIP
), RCB_REG(D31IP
));
375 writel(NOINT
<< D30IP_PIP
, RCB_REG(D30IP
));
376 writel(INTA
<< D29IP_E1P
, RCB_REG(D29IP
));
377 writel(INTA
<< D28IP_P3IP
, RCB_REG(D28IP
));
378 writel(INTA
<< D27IP_ZIP
, RCB_REG(D27IP
));
379 writel(INTA
<< D26IP_E2P
, RCB_REG(D26IP
));
380 writel(NOINT
<< D25IP_LIP
, RCB_REG(D25IP
));
381 writel(NOINT
<< D22IP_MEI1IP
, RCB_REG(D22IP
));
383 /* Device interrupt route registers */
384 writel(DIR_ROUTE(PIRQB
, PIRQH
, PIRQA
, PIRQC
), RCB_REG(D31IR
));
385 writel(DIR_ROUTE(PIRQD
, PIRQE
, PIRQF
, PIRQG
), RCB_REG(D29IR
));
386 writel(DIR_ROUTE(PIRQB
, PIRQC
, PIRQD
, PIRQE
), RCB_REG(D28IR
));
387 writel(DIR_ROUTE(PIRQA
, PIRQH
, PIRQA
, PIRQB
), RCB_REG(D27IR
));
388 writel(DIR_ROUTE(PIRQF
, PIRQE
, PIRQG
, PIRQH
), RCB_REG(D26IR
));
389 writel(DIR_ROUTE(PIRQA
, PIRQB
, PIRQC
, PIRQD
), RCB_REG(D25IR
));
390 writel(DIR_ROUTE(PIRQA
, PIRQB
, PIRQC
, PIRQD
), RCB_REG(D22IR
));
392 /* Enable IOAPIC (generic) */
393 writew(0x0100, RCB_REG(OIC
));
394 /* PCH BWG says to read back the IOAPIC enable register */
395 (void)readw(RCB_REG(OIC
));
397 /* Disable unused devices (board specific) */
398 setbits_le32(RCB_REG(FD
), PCH_DISABLE_ALWAYS
);
403 struct pei_data _pei_data
__aligned(8) = {
404 .pei_version
= PEI_VERSION
,
405 .mchbar
= MCH_BASE_ADDRESS
,
406 .dmibar
= DEFAULT_DMIBAR
,
407 .epbar
= DEFAULT_EPBAR
,
408 .pciexbar
= CONFIG_PCIE_ECAM_BASE
,
409 .smbusbar
= SMBUS_IO_BASE
,
412 .hpet_address
= CONFIG_HPET_ADDRESS
,
413 .rcba
= DEFAULT_RCBABASE
,
414 .pmbase
= DEFAULT_PMBASE
,
415 .gpiobase
= DEFAULT_GPIOBASE
,
416 .thermalbase
= 0xfed08000,
417 .system_type
= 0, /* 0 Mobile, 1 Desktop/Server */
418 .tseg_size
= CONFIG_SMM_TSEG_SIZE
,
419 .ts_addresses
= { 0x00, 0x00, 0x00, 0x00 },
423 * 0 = leave channel enabled
424 * 1 = disable dimm 0 on channel
425 * 2 = disable dimm 1 on channel
426 * 3 = disable dimm 0+1 on channel
428 .dimm_channel0_disabled
= 2,
429 .dimm_channel1_disabled
= 2,
430 .max_ddr3_freq
= 1600,
433 * Empty and onboard Ports 0-7, set to un-used pin
436 { 0, 3, 0x0000 }, /* P0= Empty */
437 { 1, 0, 0x0040 }, /* P1= Left USB 1 (OC0) */
438 { 1, 1, 0x0040 }, /* P2= Left USB 2 (OC1) */
439 { 1, 3, 0x0040 }, /* P3= SDCARD (no OC) */
440 { 0, 3, 0x0000 }, /* P4= Empty */
441 { 1, 3, 0x0040 }, /* P5= WWAN (no OC) */
442 { 0, 3, 0x0000 }, /* P6= Empty */
443 { 0, 3, 0x0000 }, /* P7= Empty */
445 * Empty and onboard Ports 8-13, set to un-used pin
448 { 1, 4, 0x0040 }, /* P8= Camera (no OC) */
449 { 1, 4, 0x0040 }, /* P9= Bluetooth (no OC) */
450 { 0, 4, 0x0000 }, /* P10= Empty */
451 { 0, 4, 0x0000 }, /* P11= Empty */
452 { 0, 4, 0x0000 }, /* P12= Empty */
453 { 0, 4, 0x0000 }, /* P13= Empty */
456 struct pei_data
*pei_data
= &_pei_data
;
457 struct udevice
*dev
, *me_dev
;
460 /* We need the pinctrl set up early */
461 ret
= syscon_get_by_driver_data(X86_SYSCON_PINCONF
, &dev
);
463 debug("%s: Could not get pinconf (ret=%d)\n", __func__
, ret
);
467 ret
= uclass_first_device_err(UCLASS_NORTHBRIDGE
, &dev
);
469 debug("%s: Could not get northbridge (ret=%d)\n", __func__
,
473 ret
= syscon_get_by_driver_data(X86_SYSCON_ME
, &me_dev
);
475 debug("%s: Could not get ME (ret=%d)\n", __func__
, ret
);
478 ret
= copy_spd(dev
, pei_data
);
480 debug("%s: Could not get SPD (ret=%d)\n", __func__
, ret
);
483 pei_data
->boot_mode
= gd
->arch
.pei_boot_mode
;
484 debug("Boot mode %d\n", gd
->arch
.pei_boot_mode
);
485 debug("mrc_input %p\n", pei_data
->mrc_input
);
488 * Do not pass MRC data in for recovery mode boot,
489 * Always pass it in for S3 resume.
491 if (!recovery_mode_enabled() ||
492 pei_data
->boot_mode
== PEI_BOOT_RESUME
) {
493 ret
= prepare_mrc_cache(pei_data
);
495 debug("prepare_mrc_cache failed: %d\n", ret
);
498 /* If MRC data is not found we cannot continue S3 resume. */
499 if (pei_data
->boot_mode
== PEI_BOOT_RESUME
&& !pei_data
->mrc_input
) {
500 debug("Giving up in sdram_initialize: No MRC data\n");
504 /* Pass console handler in pei_data */
505 pei_data
->tx_byte
= sdram_console_tx_byte
;
507 /* Wait for ME to be ready */
508 ret
= intel_early_me_init(me_dev
);
510 debug("%s: Could not init ME (ret=%d)\n", __func__
, ret
);
513 ret
= intel_early_me_uma_size(me_dev
);
515 debug("%s: Could not get UMA size (ret=%d)\n", __func__
, ret
);
519 ret
= mrc_common_init(dev
, pei_data
, false);
521 debug("%s: mrc_common_init() failed (ret=%d)\n", __func__
, ret
);
525 ret
= sdram_find(dev
);
527 debug("%s: sdram_find() failed (ret=%d)\n", __func__
, ret
);
530 gd
->ram_size
= gd
->arch
.meminfo
.total_32bit_memory
;
532 debug("MRC output data length %#x at %p\n", pei_data
->mrc_output_len
,
533 pei_data
->mrc_output
);
535 post_system_agent_init(dev
, me_dev
, pei_data
);
536 report_memory_config();
538 /* S3 resume: don't save scrambler seed or MRC data */
539 if (pei_data
->boot_mode
!= PEI_BOOT_RESUME
) {
541 * This will be copied to SDRAM in reserve_arch(), then written
542 * to SPI flash in mrccache_save()
544 gd
->arch
.mrc_output
= (char *)pei_data
->mrc_output
;
545 gd
->arch
.mrc_output_len
= pei_data
->mrc_output_len
;
546 ret
= write_seeds_to_cmos(pei_data
);
548 debug("Failed to write seeds to CMOS: %d\n", ret
);
551 writew(0xCAFE, MCHBAR_REG(SSKPD
));