2 * Copyright (c) 2014 Google, Inc
4 * Graeme Russ, graeme.russ@gmail.com.
6 * Some portions from coreboot src/mainboard/google/link/romstage.c
7 * and src/cpu/intel/model_206ax/bootblock.c
8 * Copyright (C) 2007-2010 coresystems GmbH
9 * Copyright (C) 2011 Google Inc.
11 * SPDX-License-Identifier: GPL-2.0
19 #include <asm/lapic.h>
24 #include <asm/processor.h>
25 #include <asm/arch/model_206ax.h>
26 #include <asm/arch/microcode.h>
27 #include <asm/arch/pch.h>
28 #include <asm/arch/sandybridge.h>
30 DECLARE_GLOBAL_DATA_PTR;
32 static void enable_port80_on_lpc(struct pci_controller *hose, pci_dev_t dev)
34 /* Enable port 80 POST on LPC */
35 pci_hose_write_config_dword(hose, dev, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
36 clrbits_le32(RCB_REG(GCS), 4);
40 * Enable Prefetching and Caching.
42 static void enable_spi_prefetch(struct pci_controller *hose, pci_dev_t dev)
46 pci_hose_read_config_byte(hose, dev, 0xdc, ®8);
48 reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
49 pci_hose_write_config_byte(hose, dev, 0xdc, reg8);
52 static int set_flex_ratio_to_tdp_nominal(void)
54 msr_t flex_ratio, msr;
57 /* Minimum CPU revision for configurable TDP support */
58 if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID)
61 /* Check for Flex Ratio support */
62 flex_ratio = msr_read(MSR_FLEX_RATIO);
63 if (!(flex_ratio.lo & FLEX_RATIO_EN))
66 /* Check for >0 configurable TDPs */
67 msr = msr_read(MSR_PLATFORM_INFO);
68 if (((msr.hi >> 1) & 3) == 0)
71 /* Use nominal TDP ratio for flex ratio */
72 msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
73 nominal_ratio = msr.lo & 0xff;
75 /* See if flex ratio is already set to nominal TDP ratio */
76 if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio)
79 /* Set flex ratio to nominal TDP ratio */
80 flex_ratio.lo &= ~0xff00;
81 flex_ratio.lo |= nominal_ratio << 8;
82 flex_ratio.lo |= FLEX_RATIO_LOCK;
83 msr_write(MSR_FLEX_RATIO, flex_ratio);
85 /* Set flex ratio in soft reset data register bits 11:6 */
86 clrsetbits_le32(RCB_REG(SOFT_RESET_DATA), 0x3f << 6,
87 (nominal_ratio & 0x3f) << 6);
89 /* Set soft reset control to use register value */
90 setbits_le32(RCB_REG(SOFT_RESET_CTRL), 1);
92 /* Issue warm reset, will be "CPU only" due to soft reset data */
93 outb(0x0, PORT_RESET);
94 outb(0x6, PORT_RESET);
101 static void set_spi_speed(void)
105 /* Observe SPI Descriptor Component Section 0 */
106 writel(0x1000, RCB_REG(SPI_DESC_COMP0));
108 /* Extract the1 Write/Erase SPI Frequency from descriptor */
109 fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
113 /* Set Software Sequence frequency to match */
114 clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
117 int arch_cpu_init(void)
119 post_code(POST_CPU_INIT);
120 timer_set_base(rdtsc());
122 return x86_cpu_init_f();
125 int arch_cpu_init_dm(void)
127 const void *blob = gd->fdt_blob;
128 struct pci_controller *hose;
132 post_code(POST_CPU_INIT);
133 timer_set_base(rdtsc());
135 ret = x86_cpu_init_f();
139 ret = pci_early_init_hose(&hose);
143 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_LPC);
146 ret = lpc_early_init(gd->fdt_blob, node, PCH_LPC_DEV);
150 enable_spi_prefetch(hose, PCH_LPC_DEV);
152 /* This is already done in start.S, but let's do it in C */
153 enable_port80_on_lpc(hose, PCH_LPC_DEV);
158 * We should do as little as possible before the serial console is
159 * up. Perhaps this should move to later. Our next lot of init
160 * happens in print_cpuinfo() when we have a console
162 ret = set_flex_ratio_to_tdp_nominal();
169 static int enable_smbus(void)
174 /* Set the SMBus device statically. */
175 dev = PCI_BDF(0x0, 0x1f, 0x3);
177 /* Check to make sure we've got the right device. */
178 value = x86_pci_read_config16(dev, 0x0);
179 if (value != 0x8086) {
180 printf("SMBus controller not found\n");
184 /* Set SMBus I/O base. */
185 x86_pci_write_config32(dev, SMB_BASE,
186 SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO);
188 /* Set SMBus enable. */
189 x86_pci_write_config8(dev, HOSTC, HST_EN);
191 /* Set SMBus I/O space enable. */
192 x86_pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
194 /* Disable interrupt generation. */
195 outb(0, SMBUS_IO_BASE + SMBHSTCTL);
197 /* Clear any lingering errors, so transactions can run. */
198 outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
199 debug("SMBus controller enabled\n");
204 #define PCH_EHCI0_TEMP_BAR0 0xe8000000
205 #define PCH_EHCI1_TEMP_BAR0 0xe8000400
206 #define PCH_XHCI_TEMP_BAR0 0xe8001000
209 * Setup USB controller MMIO BAR to prevent the reference code from
210 * resetting the controller.
212 * The BAR will be re-assigned during device enumeration so these are only
215 * This is used to speed up the resume path.
217 static void enable_usb_bar(void)
219 pci_dev_t usb0 = PCH_EHCI1_DEV;
220 pci_dev_t usb1 = PCH_EHCI2_DEV;
221 pci_dev_t usb3 = PCH_XHCI_DEV;
224 /* USB Controller 1 */
225 x86_pci_write_config32(usb0, PCI_BASE_ADDRESS_0,
226 PCH_EHCI0_TEMP_BAR0);
227 cmd = x86_pci_read_config32(usb0, PCI_COMMAND);
228 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
229 x86_pci_write_config32(usb0, PCI_COMMAND, cmd);
231 /* USB Controller 1 */
232 x86_pci_write_config32(usb1, PCI_BASE_ADDRESS_0,
233 PCH_EHCI1_TEMP_BAR0);
234 cmd = x86_pci_read_config32(usb1, PCI_COMMAND);
235 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
236 x86_pci_write_config32(usb1, PCI_COMMAND, cmd);
238 /* USB3 Controller */
239 x86_pci_write_config32(usb3, PCI_BASE_ADDRESS_0,
241 cmd = x86_pci_read_config32(usb3, PCI_COMMAND);
242 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
243 x86_pci_write_config32(usb3, PCI_COMMAND, cmd);
246 static int report_bist_failure(void)
248 if (gd->arch.bist != 0) {
249 post_code(POST_BIST_FAILURE);
250 printf("BIST failed: %08x\n", gd->arch.bist);
257 int print_cpuinfo(void)
259 enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
260 char processor_name[CPU_MAX_NAME_LEN];
266 /* Halt if there was a built in self test failure */
267 ret = report_bist_failure();
273 ret = microcode_update_intel();
277 /* Enable upper 128bytes of CMOS */
278 writel(1 << 2, RCB_REG(RC));
280 /* TODO: cmos_post_init() */
281 if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
282 debug("soft reset detected\n");
283 boot_mode = PEI_BOOT_SOFT_RESET;
285 /* System is not happy after keyboard reset... */
286 debug("Issuing CF9 warm reset\n");
291 /* Early chipset init required before RAM init can work */
292 sandybridge_early_init(SANDYBRIDGE_MOBILE);
294 /* Check PM1_STS[15] to see if we are waking from Sx */
295 pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
297 /* Read PM1_CNT[12:10] to determine which Sx state */
298 pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
300 if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
301 #if CONFIG_HAVE_ACPI_RESUME
302 debug("Resume from S3 detected.\n");
303 boot_mode = PEI_BOOT_RESUME;
304 /* Clear SLP_TYPE. This will break stage2 but
305 * we care for that when we get there.
307 outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT);
309 debug("Resume from S3 detected, but disabled.\n");
313 * TODO: An indication of life might be possible here (e.g.
317 post_code(POST_EARLY_INIT);
319 /* Enable SPD ROMs and DDR-III DRAM */
320 ret = enable_smbus();
324 /* Prepare USB controller early in S3 resume */
325 if (boot_mode == PEI_BOOT_RESUME)
328 gd->arch.pei_boot_mode = boot_mode;
330 /* TODO: Move this to the board or driver */
331 x86_pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE | 1);
332 x86_pci_write_config32(PCH_LPC_DEV, GPIO_CNTL, 0x10);
334 /* Print processor name */
335 name = cpu_get_name(processor_name);
336 printf("CPU: %s\n", name);
338 post_code(POST_CPU_INFO);