* Graeme Russ, graeme.russ@gmail.com.
*
* Some portions from coreboot src/mainboard/google/link/romstage.c
+ * and src/cpu/intel/model_206ax/bootblock.c
* Copyright (C) 2007-2010 coresystems GmbH
* Copyright (C) 2011 Google Inc.
*
#include <errno.h>
#include <fdtdec.h>
#include <asm/cpu.h>
+#include <asm/io.h>
+#include <asm/lapic.h>
+#include <asm/msr.h>
+#include <asm/mtrr.h>
#include <asm/pci.h>
#include <asm/post.h>
#include <asm/processor.h>
+#include <asm/arch/model_206ax.h>
+#include <asm/arch/microcode.h>
#include <asm/arch/pch.h>
+#include <asm/arch/sandybridge.h>
DECLARE_GLOBAL_DATA_PTR;
+static void enable_port80_on_lpc(struct pci_controller *hose, pci_dev_t dev)
+{
+ /* Enable port 80 POST on LPC */
+ pci_hose_write_config_dword(hose, dev, PCH_RCBA_BASE, DEFAULT_RCBA | 1);
+ clrbits_le32(RCB_REG(GCS), 4);
+}
+
+/*
+ * Enable Prefetching and Caching.
+ */
+static void enable_spi_prefetch(struct pci_controller *hose, pci_dev_t dev)
+{
+ u8 reg8;
+
+ pci_hose_read_config_byte(hose, dev, 0xdc, ®8);
+ reg8 &= ~(3 << 2);
+ reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
+ pci_hose_write_config_byte(hose, dev, 0xdc, reg8);
+}
+
+static void set_var_mtrr(
+ unsigned reg, unsigned base, unsigned size, unsigned type)
+
+{
+ /* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
+ /* FIXME: It only support 4G less range */
+ wrmsr(MTRRphysBase_MSR(reg), base | type, 0);
+ wrmsr(MTRRphysMask_MSR(reg), ~(size - 1) | MTRRphysMaskValid,
+ (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1);
+}
+
+static void enable_rom_caching(void)
+{
+ disable_caches();
+ set_var_mtrr(1, 0xffc00000, 4 << 20, MTRR_TYPE_WRPROT);
+ enable_caches();
+
+ /* Enable Variable MTRRs */
+ wrmsr(MTRRdefType_MSR, 0x800, 0);
+}
+
+static int set_flex_ratio_to_tdp_nominal(void)
+{
+ msr_t flex_ratio, msr;
+ u8 nominal_ratio;
+
+ /* Minimum CPU revision for configurable TDP support */
+ if (cpuid_eax(1) < IVB_CONFIG_TDP_MIN_CPUID)
+ return -EINVAL;
+
+ /* Check for Flex Ratio support */
+ flex_ratio = msr_read(MSR_FLEX_RATIO);
+ if (!(flex_ratio.lo & FLEX_RATIO_EN))
+ return -EINVAL;
+
+ /* Check for >0 configurable TDPs */
+ msr = msr_read(MSR_PLATFORM_INFO);
+ if (((msr.hi >> 1) & 3) == 0)
+ return -EINVAL;
+
+ /* Use nominal TDP ratio for flex ratio */
+ msr = msr_read(MSR_CONFIG_TDP_NOMINAL);
+ nominal_ratio = msr.lo & 0xff;
+
+ /* See if flex ratio is already set to nominal TDP ratio */
+ if (((flex_ratio.lo >> 8) & 0xff) == nominal_ratio)
+ return 0;
+
+ /* Set flex ratio to nominal TDP ratio */
+ flex_ratio.lo &= ~0xff00;
+ flex_ratio.lo |= nominal_ratio << 8;
+ flex_ratio.lo |= FLEX_RATIO_LOCK;
+ msr_write(MSR_FLEX_RATIO, flex_ratio);
+
+ /* Set flex ratio in soft reset data register bits 11:6 */
+ clrsetbits_le32(RCB_REG(SOFT_RESET_DATA), 0x3f << 6,
+ (nominal_ratio & 0x3f) << 6);
+
+ /* Set soft reset control to use register value */
+ setbits_le32(RCB_REG(SOFT_RESET_CTRL), 1);
+
+ /* Issue warm reset, will be "CPU only" due to soft reset data */
+ outb(0x0, PORT_RESET);
+ outb(0x6, PORT_RESET);
+ cpu_hlt();
+
+ /* Not reached */
+ return -EINVAL;
+}
+
+static void set_spi_speed(void)
+{
+ u32 fdod;
+
+ /* Observe SPI Descriptor Component Section 0 */
+ writel(0x1000, RCB_REG(SPI_DESC_COMP0));
+
+ /* Extract the1 Write/Erase SPI Frequency from descriptor */
+ fdod = readl(RCB_REG(SPI_FREQ_WR_ERA));
+ fdod >>= 24;
+ fdod &= 7;
+
+ /* Set Software Sequence frequency to match */
+ clrsetbits_8(RCB_REG(SPI_FREQ_SWSEQ), 7, fdod);
+}
+
int arch_cpu_init(void)
{
const void *blob = gd->fdt_blob;
if (ret)
return ret;
+ enable_spi_prefetch(hose, PCH_LPC_DEV);
+
+ /* This is already done in start.S, but let's do it in C */
+ enable_port80_on_lpc(hose, PCH_LPC_DEV);
+
+ /* already done in car.S */
+ if (false)
+ enable_rom_caching();
+
+ set_spi_speed();
+
+ /*
+ * We should do as little as possible before the serial console is
+ * up. Perhaps this should move to later. Our next lot of init
+ * happens in print_cpuinfo() when we have a console
+ */
+ ret = set_flex_ratio_to_tdp_nominal();
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int enable_smbus(void)
+{
+ pci_dev_t dev;
+ uint16_t value;
+
+ /* Set the SMBus device statically. */
+ dev = PCI_BDF(0x0, 0x1f, 0x3);
+
+ /* Check to make sure we've got the right device. */
+ value = pci_read_config16(dev, 0x0);
+ if (value != 0x8086) {
+ printf("SMBus controller not found\n");
+ return -ENOSYS;
+ }
+
+ /* Set SMBus I/O base. */
+ pci_write_config32(dev, SMB_BASE,
+ SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO);
+
+ /* Set SMBus enable. */
+ pci_write_config8(dev, HOSTC, HST_EN);
+
+ /* Set SMBus I/O space enable. */
+ pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
+
+ /* Disable interrupt generation. */
+ outb(0, SMBUS_IO_BASE + SMBHSTCTL);
+
+ /* Clear any lingering errors, so transactions can run. */
+ outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
+ debug("SMBus controller enabled\n");
+
+ return 0;
+}
+
+#define PCH_EHCI0_TEMP_BAR0 0xe8000000
+#define PCH_EHCI1_TEMP_BAR0 0xe8000400
+#define PCH_XHCI_TEMP_BAR0 0xe8001000
+
+/*
+ * Setup USB controller MMIO BAR to prevent the reference code from
+ * resetting the controller.
+ *
+ * The BAR will be re-assigned during device enumeration so these are only
+ * temporary.
+ *
+ * This is used to speed up the resume path.
+ */
+static void enable_usb_bar(void)
+{
+ pci_dev_t usb0 = PCH_EHCI1_DEV;
+ pci_dev_t usb1 = PCH_EHCI2_DEV;
+ pci_dev_t usb3 = PCH_XHCI_DEV;
+ u32 cmd;
+
+ /* USB Controller 1 */
+ pci_write_config32(usb0, PCI_BASE_ADDRESS_0,
+ PCH_EHCI0_TEMP_BAR0);
+ cmd = pci_read_config32(usb0, PCI_COMMAND);
+ cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_write_config32(usb0, PCI_COMMAND, cmd);
+
+ /* USB Controller 1 */
+ pci_write_config32(usb1, PCI_BASE_ADDRESS_0,
+ PCH_EHCI1_TEMP_BAR0);
+ cmd = pci_read_config32(usb1, PCI_COMMAND);
+ cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_write_config32(usb1, PCI_COMMAND, cmd);
+
+ /* USB3 Controller */
+ pci_write_config32(usb3, PCI_BASE_ADDRESS_0,
+ PCH_XHCI_TEMP_BAR0);
+ cmd = pci_read_config32(usb3, PCI_COMMAND);
+ cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
+ pci_write_config32(usb3, PCI_COMMAND, cmd);
+}
+
+static int report_bist_failure(void)
+{
+ if (gd->arch.bist != 0) {
+ printf("BIST failed: %08x\n", gd->arch.bist);
+ return -EFAULT;
+ }
+
return 0;
}
int print_cpuinfo(void)
{
+ enum pei_boot_mode_t boot_mode = PEI_BOOT_NONE;
char processor_name[CPU_MAX_NAME_LEN];
const char *name;
+ uint32_t pm1_cnt;
+ uint16_t pm1_sts;
+ int ret;
+
+ /* Halt if there was a built in self test failure */
+ ret = report_bist_failure();
+ if (ret)
+ return ret;
+
+ enable_lapic();
+
+ ret = microcode_update_intel();
+ if (ret && ret != -ENOENT && ret != -EEXIST)
+ return ret;
+
+ /* Enable upper 128bytes of CMOS */
+ writel(1 << 2, RCB_REG(RC));
+
+ /* TODO: cmos_post_init() */
+ if (readl(MCHBAR_REG(SSKPD)) == 0xCAFE) {
+ debug("soft reset detected\n");
+ boot_mode = PEI_BOOT_SOFT_RESET;
+
+ /* System is not happy after keyboard reset... */
+ debug("Issuing CF9 warm reset\n");
+ outb(0x6, 0xcf9);
+ cpu_hlt();
+ }
+
+ /* Early chipset init required before RAM init can work */
+ sandybridge_early_init(SANDYBRIDGE_MOBILE);
+
+ /* Check PM1_STS[15] to see if we are waking from Sx */
+ pm1_sts = inw(DEFAULT_PMBASE + PM1_STS);
+
+ /* Read PM1_CNT[12:10] to determine which Sx state */
+ pm1_cnt = inl(DEFAULT_PMBASE + PM1_CNT);
+
+ if ((pm1_sts & WAK_STS) && ((pm1_cnt >> 10) & 7) == 5) {
+#if CONFIG_HAVE_ACPI_RESUME
+ debug("Resume from S3 detected.\n");
+ boot_mode = PEI_BOOT_RESUME;
+ /* Clear SLP_TYPE. This will break stage2 but
+ * we care for that when we get there.
+ */
+ outl(pm1_cnt & ~(7 << 10), DEFAULT_PMBASE + PM1_CNT);
+#else
+ debug("Resume from S3 detected, but disabled.\n");
+#endif
+ } else {
+ /*
+ * TODO: An indication of life might be possible here (e.g.
+ * keyboard light)
+ */
+ }
+ post_code(POST_EARLY_INIT);
+
+ /* Enable SPD ROMs and DDR-III DRAM */
+ ret = enable_smbus();
+ if (ret)
+ return ret;
+
+ /* Prepare USB controller early in S3 resume */
+ if (boot_mode == PEI_BOOT_RESUME)
+ enable_usb_bar();
+
+ gd->arch.pei_boot_mode = boot_mode;
+
+ /* TODO: Move this to the board or driver */
+ pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE | 1);
+ pci_write_config32(PCH_LPC_DEV, GPIO_CNTL, 0x10);
/* Print processor name */
name = cpu_get_name(processor_name);
printf("CPU: %s\n", name);
+ post_code(POST_CPU_INFO);
+
return 0;
}
projects / oweals / u-boot.git / blobdiff