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
17 #include <asm/processor.h>
19 #include <asm/global_data.h>
21 #include <asm/arch/me.h>
22 #include <asm/arch/pei_data.h>
23 #include <asm/arch/pch.h>
25 #include <asm/arch/sandybridge.h>
27 DECLARE_GLOBAL_DATA_PTR;
30 * This function looks for the highest region of memory lower than 4GB which
31 * has enough space for U-Boot where U-Boot is aligned on a page boundary.
32 * It overrides the default implementation found elsewhere which simply
33 * picks the end of ram, wherever that may be. The location of the stack,
34 * the relocation address, and how far U-Boot is moved by relocation are
35 * set in the global data structure.
37 ulong board_get_usable_ram_top(ulong total_size)
39 struct memory_info *info = &gd->arch.meminfo;
40 uintptr_t dest_addr = 0;
41 struct memory_area *largest = NULL;
44 /* Find largest area of memory below 4GB */
46 for (i = 0; i < info->num_areas; i++) {
47 struct memory_area *area = &info->area[i];
49 if (area->start >= 1ULL << 32)
51 if (!largest || area->size > largest->size)
55 /* If no suitable area was found, return an error. */
57 if (!largest || largest->size < (2 << 20))
58 panic("No available memory found for relocation");
60 dest_addr = largest->start + largest->size;
62 return (ulong)dest_addr;
65 void dram_init_banksize(void)
67 struct memory_info *info = &gd->arch.meminfo;
71 for (i = 0, num_banks = 0; i < info->num_areas; i++) {
72 struct memory_area *area = &info->area[i];
74 if (area->start >= 1ULL << 32)
76 gd->bd->bi_dram[num_banks].start = area->start;
77 gd->bd->bi_dram[num_banks].size = area->size;
82 static const char *const ecc_decoder[] = {
90 * Dump in the log memory controller configuration as read from the memory
91 * controller registers.
93 static void report_memory_config(void)
95 u32 addr_decoder_common, addr_decode_ch[2];
98 addr_decoder_common = readl(MCHBAR_REG(0x5000));
99 addr_decode_ch[0] = readl(MCHBAR_REG(0x5004));
100 addr_decode_ch[1] = readl(MCHBAR_REG(0x5008));
102 debug("memcfg DDR3 clock %d MHz\n",
103 (readl(MCHBAR_REG(0x5e04)) * 13333 * 2 + 50) / 100);
104 debug("memcfg channel assignment: A: %d, B % d, C % d\n",
105 addr_decoder_common & 3,
106 (addr_decoder_common >> 2) & 3,
107 (addr_decoder_common >> 4) & 3);
109 for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) {
110 u32 ch_conf = addr_decode_ch[i];
111 debug("memcfg channel[%d] config (%8.8x):\n", i, ch_conf);
112 debug(" ECC %s\n", ecc_decoder[(ch_conf >> 24) & 3]);
113 debug(" enhanced interleave mode %s\n",
114 ((ch_conf >> 22) & 1) ? "on" : "off");
115 debug(" rank interleave %s\n",
116 ((ch_conf >> 21) & 1) ? "on" : "off");
117 debug(" DIMMA %d MB width x%d %s rank%s\n",
118 ((ch_conf >> 0) & 0xff) * 256,
119 ((ch_conf >> 19) & 1) ? 16 : 8,
120 ((ch_conf >> 17) & 1) ? "dual" : "single",
121 ((ch_conf >> 16) & 1) ? "" : ", selected");
122 debug(" DIMMB %d MB width x%d %s rank%s\n",
123 ((ch_conf >> 8) & 0xff) * 256,
124 ((ch_conf >> 20) & 1) ? 16 : 8,
125 ((ch_conf >> 18) & 1) ? "dual" : "single",
126 ((ch_conf >> 16) & 1) ? ", selected" : "");
130 static void post_system_agent_init(struct pei_data *pei_data)
132 /* If PCIe init is skipped, set the PEG clock gating */
133 if (!pei_data->pcie_init)
134 setbits_le32(MCHBAR_REG(0x7010), 1);
137 static asmlinkage void console_tx_byte(unsigned char byte)
145 * Find the PEI executable in the ROM and execute it.
147 * @param pei_data: configuration data for UEFI PEI reference code
149 int sdram_initialise(struct pei_data *pei_data)
156 report_platform_info();
158 /* Wait for ME to be ready */
159 ret = intel_early_me_init();
162 ret = intel_early_me_uma_size();
166 debug("Starting UEFI PEI System Agent\n");
168 /* If MRC data is not found we cannot continue S3 resume. */
169 if (pei_data->boot_mode == PEI_BOOT_RESUME && !pei_data->mrc_input) {
170 debug("Giving up in sdram_initialize: No MRC data\n");
171 outb(0x6, PORT_RESET);
175 /* Pass console handler in pei_data */
176 pei_data->tx_byte = console_tx_byte;
178 debug("PEI data at %p, size %x:\n", pei_data, sizeof(*pei_data));
180 data = (char *)CONFIG_X86_MRC_ADDR;
183 int (*func)(struct pei_data *);
185 debug("Calling MRC at %p\n", data);
186 post_code(POST_PRE_MRC);
187 func = (int (*)(struct pei_data *))data;
193 printf("PEI version mismatch.\n");
196 printf("Invalid memory frequency.\n");
199 printf("MRC returned %x.\n", rv);
201 printf("Nonzero MRC return value.\n");
205 printf("UEFI PEI System Agent not found.\n");
210 /* mrc.bin reconfigures USB, so reinit it to have debug */
211 early_usbdebug_init();
214 version = readl(MCHBAR_REG(0x5034));
215 debug("System Agent Version %d.%d.%d Build %d\n",
216 version >> 24 , (version >> 16) & 0xff,
217 (version >> 8) & 0xff, version & 0xff);
220 * Send ME init done for SandyBridge here. This is done inside the
221 * SystemAgent binary on IvyBridge
223 done = pci_read_config32(PCH_DEV, PCI_DEVICE_ID);
224 done &= BASE_REV_MASK;
225 if (BASE_REV_SNB == done)
226 intel_early_me_init_done(ME_INIT_STATUS_SUCCESS);
228 intel_early_me_status();
230 post_system_agent_init(pei_data);
231 report_memory_config();
236 static int copy_spd(struct pei_data *peid)
238 const int gpio_vector[] = {41, 42, 43, 10, -1};
240 const void *blob = gd->fdt_blob;
245 if (gpio_vector[i] == -1)
247 ret = gpio_requestf(gpio_vector[i], "spd_id%d", i);
249 debug("%s: Could not request gpio %d\n", __func__,
254 spd_index = gpio_get_values_as_int(gpio_vector);
255 debug("spd index %d\n", spd_index);
256 node = fdtdec_next_compatible(blob, 0, COMPAT_MEMORY_SPD);
258 printf("SPD data not found.\n");
262 for (spd_node = fdt_first_subnode(blob, node);
264 spd_node = fdt_next_subnode(blob, spd_node)) {
268 if (fdtdec_get_int(blob, spd_node, "reg", -1) != spd_index)
270 data = fdt_getprop(blob, spd_node, "data", &len);
271 if (len < sizeof(peid->spd_data[0])) {
272 printf("Missing SPD data\n");
276 debug("Using SDRAM SPD data for '%s'\n",
277 fdt_get_name(blob, spd_node, NULL));
278 memcpy(peid->spd_data[0], data, sizeof(peid->spd_data[0]));
283 printf("No SPD data found for index %d\n", spd_index);
291 * add_memory_area() - Add a new usable memory area to our list
293 * Note: @start and @end must not span the first 4GB boundary
295 * @info: Place to store memory info
296 * @start: Start of this memory area
297 * @end: End of this memory area + 1
299 static int add_memory_area(struct memory_info *info,
300 uint64_t start, uint64_t end)
302 struct memory_area *ptr;
304 if (info->num_areas == CONFIG_NR_DRAM_BANKS)
307 ptr = &info->area[info->num_areas];
309 ptr->size = end - start;
310 info->total_memory += ptr->size;
311 if (ptr->start < (1ULL << 32))
312 info->total_32bit_memory += ptr->size;
313 debug("%d: memory %llx size %llx, total now %llx / %llx\n",
314 info->num_areas, ptr->start, ptr->size,
315 info->total_32bit_memory, info->total_memory);
322 * sdram_find() - Find available memory
324 * This is a bit complicated since on x86 there are system memory holes all
325 * over the place. We create a list of available memory blocks
327 static int sdram_find(pci_dev_t dev)
329 struct memory_info *info = &gd->arch.meminfo;
330 uint32_t tseg_base, uma_size, tolud;
331 uint64_t tom, me_base, touud;
332 uint64_t uma_memory_base = 0;
333 uint64_t uma_memory_size;
334 unsigned long long tomk;
337 /* Total Memory 2GB example:
339 * 00000000 0000MB-1992MB 1992MB RAM (writeback)
340 * 7c800000 1992MB-2000MB 8MB TSEG (SMRR)
341 * 7d000000 2000MB-2002MB 2MB GFX GTT (uncached)
342 * 7d200000 2002MB-2034MB 32MB GFX UMA (uncached)
343 * 7f200000 2034MB TOLUD
344 * 7f800000 2040MB MEBASE
345 * 7f800000 2040MB-2048MB 8MB ME UMA (uncached)
346 * 80000000 2048MB TOM
347 * 100000000 4096MB-4102MB 6MB RAM (writeback)
349 * Total Memory 4GB example:
351 * 00000000 0000MB-2768MB 2768MB RAM (writeback)
352 * ad000000 2768MB-2776MB 8MB TSEG (SMRR)
353 * ad800000 2776MB-2778MB 2MB GFX GTT (uncached)
354 * ada00000 2778MB-2810MB 32MB GFX UMA (uncached)
355 * afa00000 2810MB TOLUD
356 * ff800000 4088MB MEBASE
357 * ff800000 4088MB-4096MB 8MB ME UMA (uncached)
358 * 100000000 4096MB TOM
359 * 100000000 4096MB-5374MB 1278MB RAM (writeback)
360 * 14fe00000 5368MB TOUUD
363 /* Top of Upper Usable DRAM, including remap */
364 touud = pci_read_config32(dev, TOUUD+4);
366 touud |= pci_read_config32(dev, TOUUD);
368 /* Top of Lower Usable DRAM */
369 tolud = pci_read_config32(dev, TOLUD);
371 /* Top of Memory - does not account for any UMA */
372 tom = pci_read_config32(dev, 0xa4);
374 tom |= pci_read_config32(dev, 0xa0);
376 debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud, tolud, tom);
378 /* ME UMA needs excluding if total memory <4GB */
379 me_base = pci_read_config32(dev, 0x74);
381 me_base |= pci_read_config32(dev, 0x70);
383 debug("MEBASE %llx\n", me_base);
385 /* TODO: Get rid of all this shifting by 10 bits */
387 if (me_base == tolud) {
388 /* ME is from MEBASE-TOM */
389 uma_size = (tom - me_base) >> 10;
390 /* Increment TOLUD to account for ME as RAM */
391 tolud += uma_size << 10;
392 /* UMA starts at old TOLUD */
393 uma_memory_base = tomk * 1024ULL;
394 uma_memory_size = uma_size * 1024ULL;
395 debug("ME UMA base %llx size %uM\n", me_base, uma_size >> 10);
398 /* Graphics memory comes next */
399 ggc = pci_read_config16(dev, GGC);
401 debug("IGD decoded, subtracting ");
403 /* Graphics memory */
404 uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL;
405 debug("%uM UMA", uma_size >> 10);
407 uma_memory_base = tomk * 1024ULL;
408 uma_memory_size += uma_size * 1024ULL;
410 /* GTT Graphics Stolen Memory Size (GGMS) */
411 uma_size = ((ggc >> 8) & 0x3) * 1024ULL;
413 uma_memory_base = tomk * 1024ULL;
414 uma_memory_size += uma_size * 1024ULL;
415 debug(" and %uM GTT\n", uma_size >> 10);
418 /* Calculate TSEG size from its base which must be below GTT */
419 tseg_base = pci_read_config32(dev, 0xb8);
420 uma_size = (uma_memory_base - tseg_base) >> 10;
422 uma_memory_base = tomk * 1024ULL;
423 uma_memory_size += uma_size * 1024ULL;
424 debug("TSEG base 0x%08x size %uM\n", tseg_base, uma_size >> 10);
426 debug("Available memory below 4GB: %lluM\n", tomk >> 10);
428 /* Report the memory regions */
429 add_memory_area(info, 1 << 20, 2 << 28);
430 add_memory_area(info, (2 << 28) + (2 << 20), 4 << 28);
431 add_memory_area(info, (4 << 28) + (2 << 20), tseg_base);
432 add_memory_area(info, 1ULL << 32, touud);
434 * If >= 4GB installed then memory from TOLUD to 4GB
435 * is remapped above TOM, TOUUD will account for both
437 if (touud > (1ULL << 32ULL)) {
438 debug("Available memory above 4GB: %lluM\n",
439 (touud >> 20) - 4096);
445 static void rcba_config(void)
448 * GFX INTA -> PIRQA (MSI)
449 * D28IP_P3IP WLAN INTA -> PIRQB
450 * D29IP_E1P EHCI1 INTA -> PIRQD
451 * D26IP_E2P EHCI2 INTA -> PIRQF
452 * D31IP_SIP SATA INTA -> PIRQF (MSI)
453 * D31IP_SMIP SMBUS INTB -> PIRQH
454 * D31IP_TTIP THRT INTC -> PIRQA
455 * D27IP_ZIP HDA INTA -> PIRQA (MSI)
457 * TRACKPAD -> PIRQE (Edge Triggered)
458 * TOUCHSCREEN -> PIRQG (Edge Triggered)
461 /* Device interrupt pin register (board specific) */
462 writel((INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) |
463 (INTB << D31IP_SMIP) | (INTA << D31IP_SIP), RCB_REG(D31IP));
464 writel(NOINT << D30IP_PIP, RCB_REG(D30IP));
465 writel(INTA << D29IP_E1P, RCB_REG(D29IP));
466 writel(INTA << D28IP_P3IP, RCB_REG(D28IP));
467 writel(INTA << D27IP_ZIP, RCB_REG(D27IP));
468 writel(INTA << D26IP_E2P, RCB_REG(D26IP));
469 writel(NOINT << D25IP_LIP, RCB_REG(D25IP));
470 writel(NOINT << D22IP_MEI1IP, RCB_REG(D22IP));
472 /* Device interrupt route registers */
473 writel(DIR_ROUTE(PIRQB, PIRQH, PIRQA, PIRQC), RCB_REG(D31IR));
474 writel(DIR_ROUTE(PIRQD, PIRQE, PIRQF, PIRQG), RCB_REG(D29IR));
475 writel(DIR_ROUTE(PIRQB, PIRQC, PIRQD, PIRQE), RCB_REG(D28IR));
476 writel(DIR_ROUTE(PIRQA, PIRQH, PIRQA, PIRQB), RCB_REG(D27IR));
477 writel(DIR_ROUTE(PIRQF, PIRQE, PIRQG, PIRQH), RCB_REG(D26IR));
478 writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D25IR));
479 writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D22IR));
481 /* Enable IOAPIC (generic) */
482 writew(0x0100, RCB_REG(OIC));
483 /* PCH BWG says to read back the IOAPIC enable register */
484 (void)readw(RCB_REG(OIC));
486 /* Disable unused devices (board specific) */
487 setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
492 struct pei_data pei_data __aligned(8) = {
493 .pei_version = PEI_VERSION,
494 .mchbar = DEFAULT_MCHBAR,
495 .dmibar = DEFAULT_DMIBAR,
496 .epbar = DEFAULT_EPBAR,
497 .pciexbar = CONFIG_MMCONF_BASE_ADDRESS,
498 .smbusbar = SMBUS_IO_BASE,
501 .hpet_address = CONFIG_HPET_ADDRESS,
502 .rcba = DEFAULT_RCBABASE,
503 .pmbase = DEFAULT_PMBASE,
504 .gpiobase = DEFAULT_GPIOBASE,
505 .thermalbase = 0xfed08000,
506 .system_type = 0, /* 0 Mobile, 1 Desktop/Server */
507 .tseg_size = CONFIG_SMM_TSEG_SIZE,
508 .ts_addresses = { 0x00, 0x00, 0x00, 0x00 },
512 * 0 = leave channel enabled
513 * 1 = disable dimm 0 on channel
514 * 2 = disable dimm 1 on channel
515 * 3 = disable dimm 0+1 on channel
517 .dimm_channel0_disabled = 2,
518 .dimm_channel1_disabled = 2,
519 .max_ddr3_freq = 1600,
522 * Empty and onboard Ports 0-7, set to un-used pin
525 { 0, 3, 0x0000 }, /* P0= Empty */
526 { 1, 0, 0x0040 }, /* P1= Left USB 1 (OC0) */
527 { 1, 1, 0x0040 }, /* P2= Left USB 2 (OC1) */
528 { 1, 3, 0x0040 }, /* P3= SDCARD (no OC) */
529 { 0, 3, 0x0000 }, /* P4= Empty */
530 { 1, 3, 0x0040 }, /* P5= WWAN (no OC) */
531 { 0, 3, 0x0000 }, /* P6= Empty */
532 { 0, 3, 0x0000 }, /* P7= Empty */
534 * Empty and onboard Ports 8-13, set to un-used pin
537 { 1, 4, 0x0040 }, /* P8= Camera (no OC) */
538 { 1, 4, 0x0040 }, /* P9= Bluetooth (no OC) */
539 { 0, 4, 0x0000 }, /* P10= Empty */
540 { 0, 4, 0x0000 }, /* P11= Empty */
541 { 0, 4, 0x0000 }, /* P12= Empty */
542 { 0, 4, 0x0000 }, /* P13= Empty */
545 pci_dev_t dev = PCI_BDF(0, 0, 0);
548 debug("Boot mode %d\n", gd->arch.pei_boot_mode);
549 debug("mcr_input %p\n", pei_data.mrc_input);
550 pei_data.boot_mode = gd->arch.pei_boot_mode;
551 ret = copy_spd(&pei_data);
553 ret = sdram_initialise(&pei_data);
560 writew(0xCAFE, MCHBAR_REG(SSKPD));
562 post_code(POST_DRAM);
564 ret = sdram_find(dev);
568 gd->ram_size = gd->arch.meminfo.total_32bit_memory;