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
21 #include <asm/lapic.h>
26 #include <asm/processor.h>
27 #include <asm/arch/model_206ax.h>
28 #include <asm/arch/microcode.h>
29 #include <asm/arch/pch.h>
30 #include <asm/arch/sandybridge.h>
32 DECLARE_GLOBAL_DATA_PTR;
34 static int set_flex_ratio_to_tdp_nominal(void)
36 msr_t flex_ratio, msr;
39 /* Minimum CPU revision for configurable TDP support */
40 if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID)
43 /* Check for Flex Ratio support */
44 flex_ratio = msr_read(MSR_FLEX_RATIO);
45 if (!(flex_ratio.lo & FLEX_RATIO_EN))
48 /* Check for >0 configurable TDPs */
49 msr = msr_read(MSR_PLATFORM_INFO);
50 if (((msr.hi >> 1) & 3) == 0)
53 /* Use nominal TDP ratio for flex ratio */
54 msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
55 nominal_ratio = msr.lo & 0xff;
57 /* See if flex ratio is already set to nominal TDP ratio */
58 if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio)
61 /* Set flex ratio to nominal TDP ratio */
62 flex_ratio.lo &= ~0xff00;
63 flex_ratio.lo |= nominal_ratio << 8;
64 flex_ratio.lo |= FLEX_RATIO_LOCK;
65 msr_write(MSR_FLEX_RATIO, flex_ratio);
67 /* Set flex ratio in soft reset data register bits 11:6 */
68 clrsetbits_le32(RCB_REG(SOFT_RESET_DATA), 0x3f << 6,
69 (nominal_ratio & 0x3f) << 6);
71 /* Set soft reset control to use register value */
72 setbits_le32(RCB_REG(SOFT_RESET_CTRL), 1);
74 /* Issue warm reset, will be "CPU only" due to soft reset data */
75 outb(0x0, PORT_RESET);
76 outb(SYS_RST | RST_CPU, PORT_RESET);
83 int arch_cpu_init(void)
85 post_code(POST_CPU_INIT);
87 return x86_cpu_init_f();
90 int arch_cpu_init_dm(void)
92 struct pci_controller *hose;
93 struct udevice *bus, *dev;
97 ret = uclass_get_device(UCLASS_PCI, 0, &bus);
102 hose = dev_get_uclass_priv(bus);
104 /* TODO(sjg@chromium.org): Get rid of gd->hose */
107 ret = uclass_first_device(UCLASS_LPC, &dev);
112 * We should do as little as possible before the serial console is
113 * up. Perhaps this should move to later. Our next lot of init
114 * happens in print_cpuinfo() when we have a console
116 ret = set_flex_ratio_to_tdp_nominal();
123 #define PCH_EHCI0_TEMP_BAR0 0xe8000000
124 #define PCH_EHCI1_TEMP_BAR0 0xe8000400
125 #define PCH_XHCI_TEMP_BAR0 0xe8001000
128 * Setup USB controller MMIO BAR to prevent the reference code from
129 * resetting the controller.
131 * The BAR will be re-assigned during device enumeration so these are only
134 * This is used to speed up the resume path.
136 static void enable_usb_bar(struct udevice *bus)
138 pci_dev_t usb0 = PCH_EHCI1_DEV;
139 pci_dev_t usb1 = PCH_EHCI2_DEV;
140 pci_dev_t usb3 = PCH_XHCI_DEV;
143 /* USB Controller 1 */
144 pci_bus_write_config(bus, usb0, PCI_BASE_ADDRESS_0,
145 PCH_EHCI0_TEMP_BAR0, PCI_SIZE_32);
146 pci_bus_read_config(bus, usb0, PCI_COMMAND, &cmd, PCI_SIZE_32);
147 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
148 pci_bus_write_config(bus, usb0, PCI_COMMAND, cmd, PCI_SIZE_32);
150 /* USB Controller 2 */
151 pci_bus_write_config(bus, usb1, PCI_BASE_ADDRESS_0,
152 PCH_EHCI1_TEMP_BAR0, PCI_SIZE_32);
153 pci_bus_read_config(bus, usb1, PCI_COMMAND, &cmd, PCI_SIZE_32);
154 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
155 pci_bus_write_config(bus, usb1, PCI_COMMAND, cmd, PCI_SIZE_32);
157 /* USB3 Controller 1 */
158 pci_bus_write_config(bus, usb3, PCI_BASE_ADDRESS_0,
159 PCH_XHCI_TEMP_BAR0, PCI_SIZE_32);
160 pci_bus_read_config(bus, usb3, PCI_COMMAND, &cmd, PCI_SIZE_32);
161 cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
162 pci_bus_write_config(bus, usb3, PCI_COMMAND, cmd, PCI_SIZE_32);
165 static int report_bist_failure(void)
167 if (gd->arch.bist != 0) {
168 post_code(POST_BIST_FAILURE);
169 printf("BIST failed: %08x\n", gd->arch.bist);
176 int print_cpuinfo(void)
178 enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
179 char processor_name[CPU_MAX_NAME_LEN];
180 struct udevice *dev, *lpc;
186 /* Halt if there was a built in self test failure */
187 ret = report_bist_failure();
193 ret = microcode_update_intel();
197 /* Enable upper 128bytes of CMOS */
198 writel(1 << 2, RCB_REG(RC));
200 /* TODO: cmos_post_init() */
201 if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
202 debug("soft reset detected\n");
203 boot_mode = PEI_BOOT_SOFT_RESET;
205 /* System is not happy after keyboard reset... */
206 debug("Issuing CF9 warm reset\n");
210 /* Early chipset init required before RAM init can work */
211 uclass_first_device(UCLASS_NORTHBRIDGE, &dev);
213 ret = uclass_first_device(UCLASS_LPC, &lpc);
219 /* Cause the SATA device to do its early init */
220 uclass_first_device(UCLASS_DISK, &dev);
222 /* Check PM1_STS[15] to see if we are waking from Sx */
223 pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
225 /* Read PM1_CNT[12:10] to determine which Sx state */
226 pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
228 if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
229 debug("Resume from S3 detected, but disabled.\n");
232 * TODO: An indication of life might be possible here (e.g.
236 post_code(POST_EARLY_INIT);
238 /* Enable SPD ROMs and DDR-III DRAM */
239 ret = uclass_first_device(UCLASS_I2C, &dev);
245 /* Prepare USB controller early in S3 resume */
246 if (boot_mode == PEI_BOOT_RESUME)
247 enable_usb_bar(pci_get_controller(lpc->parent));
249 gd->arch.pei_boot_mode = boot_mode;
251 /* Print processor name */
252 name = cpu_get_name(processor_name);
253 printf("CPU: %s\n", name);
255 post_code(POST_CPU_INFO);
260 void board_debug_uart_init(void)
262 /* This enables the debug UART */
263 pci_x86_write_config(NULL, PCH_LPC_DEV, LPC_EN, COMA_LPC_EN,