| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/cpu.h> |
| #include <acpi/acpi.h> |
| #include <acpi/acpi_gnvs.h> |
| #include <acpi/acpi_pm.h> |
| #include <bootstate.h> |
| #include <console/console.h> |
| #include <cpu/intel/microcode.h> |
| #include <cpu/x86/cr.h> |
| #include <cpu/x86/msr.h> |
| #include <device/device.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ops.h> |
| |
| #include <soc/gpio.h> |
| #include <soc/lpc.h> |
| #include <soc/msr.h> |
| #include <soc/nvs.h> |
| #include <soc/pattrs.h> |
| #include <soc/pci_devs.h> |
| #include <soc/pm.h> |
| #include <soc/ramstage.h> |
| #include <soc/iosf.h> |
| |
| #define SHOW_PATTRS 1 |
| |
| struct pattrs __global_pattrs; |
| |
| static void detect_num_cpus(struct pattrs *attrs) |
| { |
| int ecx = 0; |
| |
| while (1) { |
| struct cpuid_result leaf_b; |
| |
| leaf_b = cpuid_ext(0xb, ecx); |
| |
| /* Bay Trail doesn't have hyperthreading so just determine the |
| * number of cores by from level type (ecx[15:8] == * 2). */ |
| if ((leaf_b.ecx & 0xff00) == 0x0200) { |
| attrs->num_cpus = leaf_b.ebx & 0xffff; |
| break; |
| } |
| ecx++; |
| } |
| } |
| |
| static inline void fill_in_msr(msr_t *msr, int idx) |
| { |
| *msr = rdmsr(idx); |
| if (SHOW_PATTRS) { |
| printk(BIOS_DEBUG, "msr(%x) = %08x%08x\n", |
| idx, msr->hi, msr->lo); |
| } |
| } |
| |
| static const char *stepping_str[] = { |
| "A0", "A1", "B0", "B1", "B2", "B3", "C0", "D0", |
| }; |
| |
| static void fill_in_pattrs(void) |
| { |
| struct device *dev; |
| msr_t msr; |
| struct pattrs *attrs = (struct pattrs *)pattrs_get(); |
| |
| attrs->cpuid = cpuid_eax(1); |
| dev = pcidev_on_root(LPC_DEV, LPC_FUNC); |
| attrs->revid = pci_read_config8(dev, REVID); |
| /* The revision to stepping IDs have two values per metal stepping. */ |
| if (attrs->revid >= RID_D_STEPPING_START) { |
| attrs->stepping = (attrs->revid - RID_D_STEPPING_START) / 2; |
| attrs->stepping += STEP_D0; |
| } else if (attrs->revid >= RID_C_STEPPING_START) { |
| attrs->stepping = (attrs->revid - RID_C_STEPPING_START) / 2; |
| attrs->stepping += STEP_C0; |
| } else if (attrs->revid >= RID_B_STEPPING_START) { |
| attrs->stepping = (attrs->revid - RID_B_STEPPING_START) / 2; |
| attrs->stepping += STEP_B0; |
| } else { |
| attrs->stepping = (attrs->revid - RID_A_STEPPING_START) / 2; |
| attrs->stepping += STEP_A0; |
| } |
| |
| attrs->microcode_patch = intel_microcode_find(); |
| attrs->address_bits = cpuid_eax(0x80000008) & 0xff; |
| detect_num_cpus(attrs); |
| |
| if (SHOW_PATTRS) { |
| printk(BIOS_DEBUG, "BYT: cpuid %08x cpus %d rid %02x step %s\n", |
| attrs->cpuid, attrs->num_cpus, attrs->revid, |
| (attrs->stepping >= ARRAY_SIZE(stepping_str)) ? "??" : |
| stepping_str[attrs->stepping]); |
| } |
| |
| fill_in_msr(&attrs->platform_id, IA32_PLATFORM_ID); |
| fill_in_msr(&attrs->platform_info, MSR_PLATFORM_INFO); |
| |
| /* Set IA core speed ratio and voltages */ |
| msr = rdmsr(MSR_IACORE_RATIOS); |
| attrs->iacore_ratios[IACORE_MIN] = msr.lo & 0x7f; |
| attrs->iacore_ratios[IACORE_LFM] = (msr.lo >> 8) & 0x7f; |
| attrs->iacore_ratios[IACORE_MAX] = (msr.lo >> 16) & 0x7f; |
| msr = rdmsr(MSR_IACORE_TURBO_RATIOS); |
| attrs->iacore_ratios[IACORE_TURBO] = (msr.lo & 0xff); /* 1 core max */ |
| |
| msr = rdmsr(MSR_IACORE_VIDS); |
| attrs->iacore_vids[IACORE_MIN] = msr.lo & 0x7f; |
| attrs->iacore_vids[IACORE_LFM] = (msr.lo >> 8) & 0x7f; |
| attrs->iacore_vids[IACORE_MAX] = (msr.lo >> 16) & 0x7f; |
| msr = rdmsr(MSR_IACORE_TURBO_VIDS); |
| attrs->iacore_vids[IACORE_TURBO] = (msr.lo & 0xff); /* 1 core max */ |
| |
| /* Set bus clock speed */ |
| attrs->bclk_khz = bus_freq_khz(); |
| } |
| |
| /* Save bit index for first enabled event in PM1_STS for \_SB._SWS */ |
| static void pm_fill_gnvs(struct global_nvs *gnvs, const struct chipset_power_state *ps) |
| { |
| uint16_t pm1; |
| int index; |
| |
| pm1 = ps->pm1_sts & ps->pm1_en; |
| |
| /* Scan for first set bit in PM1 */ |
| for (index = 0; index < 16; index++) { |
| if (pm1 & 1) |
| break; |
| pm1 >>= 1; |
| } |
| |
| if (index < 16) |
| gnvs->pm1i = index; |
| } |
| |
| static void acpi_save_wake_source(void *unused) |
| { |
| const struct chipset_power_state *ps; |
| struct global_nvs *gnvs; |
| |
| if (acpi_reset_gnvs_for_wake(&gnvs) < 0) |
| return; |
| if (acpi_pm_state_for_wake(&ps) < 0) |
| return; |
| |
| pm_fill_gnvs(gnvs, ps); |
| |
| printk(BIOS_DEBUG, "ACPI System Wake Source is PM1 Index %d\n", |
| gnvs->pm1i); |
| } |
| |
| BOOT_STATE_INIT_ENTRY(BS_PRE_DEVICE, BS_ON_ENTRY, acpi_save_wake_source, NULL); |
| |
| static void baytrail_enable_2x_refresh_rate(void) |
| { |
| u32 reg; |
| reg = iosf_dunit_read(0x8); |
| reg = reg & ~0x7000; |
| reg = reg | 0x2000; |
| iosf_dunit_write(0x8, reg); |
| } |
| |
| void baytrail_init_pre_device(struct soc_intel_baytrail_config *config) |
| { |
| struct soc_gpio_config *gpio_config; |
| |
| fill_in_pattrs(); |
| |
| if (!config->disable_ddr_2x_refresh_rate) |
| baytrail_enable_2x_refresh_rate(); |
| |
| /* Allow for SSE instructions to be executed. */ |
| write_cr4(read_cr4() | CR4_OSFXSR | CR4_OSXMMEXCPT); |
| |
| /* Run reference code. */ |
| baytrail_run_reference_code(); |
| |
| /* Get GPIO initial states from mainboard */ |
| gpio_config = mainboard_get_gpios(); |
| setup_soc_gpios(gpio_config, config->enable_xdp_tap); |
| |
| baytrail_init_scc(); |
| } |