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 const void *blob = gd->fdt_blob;
120 struct pci_controller *hose;
124 post_code(POST_CPU_INIT);
125 timer_set_base(rdtsc());
127 ret = x86_cpu_init_f();
131 ret = pci_early_init_hose(&hose);
135 node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_LPC);
138 ret = lpc_early_init(gd->fdt_blob, node, PCH_LPC_DEV);
142 enable_spi_prefetch(hose, PCH_LPC_DEV);
144 /* This is already done in start.S, but let's do it in C */
145 enable_port80_on_lpc(hose, PCH_LPC_DEV);
150 * We should do as little as possible before the serial console is
151 * up. Perhaps this should move to later. Our next lot of init
152 * happens in print_cpuinfo() when we have a console
154 ret = set_flex_ratio_to_tdp_nominal();
161 static int enable_smbus(void)
166 /* Set the SMBus device statically. */
167 dev = PCI_BDF(0x0, 0x1f, 0x3);
169 /* Check to make sure we've got the right device. */
170 value = pci_read_config16(dev, 0x0);
171 if (value != 0x8086) {
172 printf("SMBus controller not found\n");
176 /* Set SMBus I/O base. */
177 pci_write_config32(dev, SMB_BASE,
178 SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO);
180 /* Set SMBus enable. */
181 pci_write_config8(dev, HOSTC, HST_EN);
183 /* Set SMBus I/O space enable. */
184 pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
186 /* Disable interrupt generation. */
187 outb(0, SMBUS_IO_BASE + SMBHSTCTL);
189 /* Clear any lingering errors, so transactions can run. */
190 outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
191 debug("SMBus controller enabled\n");
196 #define PCH_EHCI0_TEMP_BAR0 0xe8000000
197 #define PCH_EHCI1_TEMP_BAR0 0xe8000400
198 #define PCH_XHCI_TEMP_BAR0 0xe8001000
201 * Setup USB controller MMIO BAR to prevent the reference code from
202 * resetting the controller.
204 * The BAR will be re-assigned during device enumeration so these are only
207 * This is used to speed up the resume path.
209 static void enable_usb_bar(void)
211 pci_dev_t usb0 = PCH_EHCI1_DEV;
212 pci_dev_t usb1 = PCH_EHCI2_DEV;
213 pci_dev_t usb3 = PCH_XHCI_DEV;
216 /* USB Controller 1 */
217 pci_write_config32(usb0, PCI_BASE_ADDRESS_0,
218 PCH_EHCI0_TEMP_BAR0);
219 cmd = pci_read_config32(usb0, PCI_COMMAND);
220 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
221 pci_write_config32(usb0, PCI_COMMAND, cmd);
223 /* USB Controller 1 */
224 pci_write_config32(usb1, PCI_BASE_ADDRESS_0,
225 PCH_EHCI1_TEMP_BAR0);
226 cmd = pci_read_config32(usb1, PCI_COMMAND);
227 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
228 pci_write_config32(usb1, PCI_COMMAND, cmd);
230 /* USB3 Controller */
231 pci_write_config32(usb3, PCI_BASE_ADDRESS_0,
233 cmd = pci_read_config32(usb3, PCI_COMMAND);
234 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
235 pci_write_config32(usb3, PCI_COMMAND, cmd);
238 static int report_bist_failure(void)
240 if (gd->arch.bist != 0) {
241 post_code(POST_BIST_FAILURE);
242 printf("BIST failed: %08x\n", gd->arch.bist);
249 int print_cpuinfo(void)
251 enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
252 char processor_name[CPU_MAX_NAME_LEN];
258 /* Halt if there was a built in self test failure */
259 ret = report_bist_failure();
265 ret = microcode_update_intel();
269 /* Enable upper 128bytes of CMOS */
270 writel(1 << 2, RCB_REG(RC));
272 /* TODO: cmos_post_init() */
273 if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
274 debug("soft reset detected\n");
275 boot_mode = PEI_BOOT_SOFT_RESET;
277 /* System is not happy after keyboard reset... */
278 debug("Issuing CF9 warm reset\n");
283 /* Early chipset init required before RAM init can work */
284 sandybridge_early_init(SANDYBRIDGE_MOBILE);
286 /* Check PM1_STS[15] to see if we are waking from Sx */
287 pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
289 /* Read PM1_CNT[12:10] to determine which Sx state */
290 pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
292 if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
293 #if CONFIG_HAVE_ACPI_RESUME
294 debug("Resume from S3 detected.\n");
295 boot_mode = PEI_BOOT_RESUME;
296 /* Clear SLP_TYPE. This will break stage2 but
297 * we care for that when we get there.
299 outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT);
301 debug("Resume from S3 detected, but disabled.\n");
305 * TODO: An indication of life might be possible here (e.g.
309 post_code(POST_EARLY_INIT);
311 /* Enable SPD ROMs and DDR-III DRAM */
312 ret = enable_smbus();
316 /* Prepare USB controller early in S3 resume */
317 if (boot_mode == PEI_BOOT_RESUME)
320 gd->arch.pei_boot_mode = boot_mode;
322 /* TODO: Move this to the board or driver */
323 pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE | 1);
324 pci_write_config32(PCH_LPC_DEV, GPIO_CNTL, 0x10);
326 /* Print processor name */
327 name = cpu_get_name(processor_name);
328 printf("CPU: %s\n", name);
330 post_code(POST_CPU_INFO);