Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4892
-gerrit
commit 4753f1657352b082a99672136654f18153e1f84c Author: Aaron Durbin adurbin@chromium.org Date: Mon Oct 21 22:32:00 2013 -0500
baytrail: SMM support
Initialize SMM on all CPUs by relocating the SMM region and setting SMRR on all the cores. Additionally SMI is enabled in the south cluster.
BUG=chrome-os-partner:22862 BRANCH=None TEST=Built and booted rambi. Tested with DEBUG_SMI and noted power button turns off board while in firmware.
Change-Id: I92e3460572feeb67d4a3d4d26af5f0ecaf7d3dd5 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/173983 --- src/soc/intel/baytrail/Makefile.inc | 7 + src/soc/intel/baytrail/baytrail/pmc.h | 118 +++++++++ src/soc/intel/baytrail/baytrail/smm.h | 41 +++ src/soc/intel/baytrail/cpu.c | 166 +++++++++++- src/soc/intel/baytrail/memmap.c | 8 +- src/soc/intel/baytrail/placeholders.c | 2 - src/soc/intel/baytrail/pmutil.c | 297 +++++++++++++++++++++ src/soc/intel/baytrail/romstage/romstage.c | 5 +- src/soc/intel/baytrail/smihandler.c | 399 +++++++++++++++++++++++++++++ src/soc/intel/baytrail/smm.c | 91 +++++++ src/soc/intel/baytrail/tsc_freq.c | 14 +- 11 files changed, 1135 insertions(+), 13 deletions(-)
diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc index fc6414c..9711549 100644 --- a/src/soc/intel/baytrail/Makefile.inc +++ b/src/soc/intel/baytrail/Makefile.inc @@ -3,6 +3,7 @@ subdirs-y += microcode subdirs-y += romstage subdirs-y += ../../../cpu/x86/lapic subdirs-y += ../../../cpu/x86/mtrr +subdirs-y += ../../../cpu/x86/smm subdirs-y += ../../../cpu/x86/tsc subdirs-y += ../../../cpu/intel/microcode
@@ -10,10 +11,12 @@ ramstage-y += memmap.c romstage-y += memmap.c ramstage-y += tsc_freq.c romstage-y += tsc_freq.c +smm-y += tsc_freq.c ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += nvm.c ramstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c romstage-$(CONFIG_CACHE_MRC_SETTINGS) += mrc_cache.c ramstage-y += spi.c +smm-y += spi.c ramstage-y += chip.c ramstage-y += iosf.c romstage-y += iosf.c @@ -23,6 +26,10 @@ ramstage-y += gpio.c romstage-y += reset.c ramstage-y += reset.c ramstage-y += cpu.c +ramstage-y += pmutil.c +smm-y += pmutil.c +smm-y += smihandler.c +ramstage-y += smm.c
# Remove as ramstage gets fleshed out ramstage-y += placeholders.c diff --git a/src/soc/intel/baytrail/baytrail/pmc.h b/src/soc/intel/baytrail/baytrail/pmc.h index b85800a..e0e5cff 100644 --- a/src/soc/intel/baytrail/baytrail/pmc.h +++ b/src/soc/intel/baytrail/baytrail/pmc.h @@ -25,6 +25,7 @@
/* Memory mapped IO registers behind PMC_BASE_ADDRESS */ #define GEN_PMCONF1 0x20 +# define AFTERG3_EN (1 << 0) # define UART_EN (1 << 24) #define ETR 0x48 # define CF9LOCK (1 << 31) @@ -34,6 +35,105 @@ # define CWORWRE (1 << 18)
/* IO Mapped registers behind ACPI_BASE_ADDRESS */ +#define PM1_STS 0x00 +#define WAK_STS (1 << 15) +#define PCIEXPWAK_STS (1 << 14) +#define USB_STS (1 << 13) +#define PRBTNOR_STS (1 << 11) +#define RTC_STS (1 << 10) +#define PWRBTN_STS (1 << 8) +#define GBL_STS (1 << 5) +#define TMROF_STS (1 << 0) +#define PM1_EN 0x02 +#define PCIEXPWAK_DIS (1 << 14) +#define USB_WAKE_EN (1 << 13) +#define RTC_EN (1 << 10) +#define PWRBTN_EN (1 << 8) +#define GBL_EN (1 << 5) +#define TMROF_EN (1 << 0) +#define PM1_CNT 0x04 +#define SLP_EN (1 << 13) +#define SLP_TYP (7 << 10) +#define SLP_TYP_S0 0 +#define SLP_TYP_S1 1 +#define SLP_TYP_S3 5 +#define SLP_TYP_S4 6 +#define SLP_TYP_S5 7 +#define GBL_RLS (1 << 2) +#define BM_RLD (1 << 1) +#define SCI_EN (1 << 0) +#define PM1_TMR 0x08 +#define GPE0_STS 0x20 +#define CORE_GPIO_STS7 (1 << 31) +#define CORE_GPIO_STS6 (1 << 30) +#define CORE_GPIO_STS5 (1 << 29) +#define CORE_GPIO_STS4 (1 << 28) +#define CORE_GPIO_STS3 (1 << 27) +#define CORE_GPIO_STS2 (1 << 26) +#define CORE_GPIO_STS1 (1 << 25) +#define CORE_GPIO_STS0 (1 << 24) +#define SUS_GPIO_STS7 (1 << 23) +#define SUS_GPIO_STS6 (1 << 22) +#define SUS_GPIO_STS5 (1 << 21) +#define SUS_GPIO_STS4 (1 << 20) +#define SUS_GPIO_STS3 (1 << 19) +#define SUS_GPIO_STS2 (1 << 18) +#define SUS_GPIO_STS1 (1 << 17) +#define SUS_GPIO_STS0 (1 << 16) +#define PME_B0_STS (1 << 13) +#define BATLOW_STS (1 << 10) +#define PCI_EXP_STS (1 << 9) +#define PCIE_WAKE3_STS (1 << 8) +#define PCIE_WAKE2_STS (1 << 7) +#define PCIE_WAKE1_STS (1 << 6) +#define GUNIT_SCI_STS (1 << 5) +#define PUNIT_SCI_STS (1 << 4) +#define PCIE_WAKE0_STS (1 << 3) +#define SWGPE_STS (1 << 2) +#define HOT_PLUG_STS (1 << 1) +#define GPE0_EN 0x28 +#define CORE_GPIO_EN7 (1 << 31) +#define CORE_GPIO_EN6 (1 << 30) +#define CORE_GPIO_EN5 (1 << 29) +#define CORE_GPIO_EN4 (1 << 28) +#define CORE_GPIO_EN3 (1 << 27) +#define CORE_GPIO_EN2 (1 << 26) +#define CORE_GPIO_EN1 (1 << 25) +#define CORE_GPIO_EN0 (1 << 24) +#define SUS_GPIO_EN7 (1 << 23) +#define SUS_GPIO_EN6 (1 << 22) +#define SUS_GPIO_EN5 (1 << 21) +#define SUS_GPIO_EN4 (1 << 20) +#define SUS_GPIO_EN3 (1 << 19) +#define SUS_GPIO_EN2 (1 << 18) +#define SUS_GPIO_EN1 (1 << 17) +#define SUS_GPIO_EN0 (1 << 16) +#define PME_B0_EN (1 << 13) +#define BATLOW_EN (1 << 10) +#define PCI_EXP_EN (1 << 9) +#define PCIE_WAKE3_EN (1 << 8) +#define PCIE_WAKE2_EN (1 << 7) +#define PCIE_WAKE1_EN (1 << 6) +#define PCIE_WAKE0_EN (1 << 3) +#define SWGPE_EN (1 << 2) +#define HOT_PLUG_EN (1 << 1) +#define SMI_EN 0x30 +#define INTEL_USB2_EN (1 << 18) // Intel-Specific USB2 SMI logic +#define USB_EN (1 << 17) // Legacy USB2 SMI logic +#define PERIODIC_EN (1 << 14) // SMI on PERIODIC_STS in SMI_STS +#define TCO_EN (1 << 13) // Enable TCO Logic (BIOSWE et al) +#define BIOS_RLS (1 << 7) // asserts SCI on bit set +#define SWSMI_TMR_EN (1 << 6) // start software smi timer on bit set +#define APMC_EN (1 << 5) // Writes to APM_CNT cause SMI# +#define SLP_SMI_EN (1 << 4) // Write to SLP_EN in PM1_CNT asserts SMI# +#define BIOS_EN (1 << 2) // Assert SMI# on setting GBL_RLS bit +#define EOS (1 << 1) // End of SMI (deassert SMI#) +#define GBL_SMI_EN (1 << 0) // SMI# generation at all? +#define SMI_STS 0x34 +#define ALT_GPIO_SMI 0x38 +#define UPRWC 0x3c +#define GPE_CTRL 0x40 +#define PM2A_CNT_BLK 0x50 #define TCO_RLD 0x60 #define TCO_STS 0x64 # define SECOND_TO_STS (1 << 17) @@ -49,4 +149,22 @@ # define RST_CPU (1 << 2) # define SYS_RST (1 << 1)
+ +/* Power Management Utility Functions. */ +uint16_t get_pmbase(void); +uint32_t clear_smi_status(void); +uint16_t clear_pm1_status(void); +uint32_t clear_tco_status(void); +uint32_t clear_gpe_status(void); +void enable_smi(uint32_t mask); +void disable_smi(uint32_t mask); +void enable_pm1(uint16_t events); +void enable_pm1_control(uint32_t mask); +void disable_pm1_control(uint32_t mask); +void enable_gpe(uint32_t mask); +void disable_gpe(uint32_t mask); +void disable_all_gpe(void); + +static inline void southcluster_log_state(void) {} + #endif /* _BAYTRAIL_PMC_H_ */ diff --git a/src/soc/intel/baytrail/baytrail/smm.h b/src/soc/intel/baytrail/baytrail/smm.h new file mode 100644 index 0000000..19a0695 --- /dev/null +++ b/src/soc/intel/baytrail/baytrail/smm.h @@ -0,0 +1,41 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _BAYTRAIL_SMM_H_ +#define _BAYTRAIL_SMM_H_ + +/* There is a bug in the order of Kconfig includes in that arch/x86/Kconfig + * is included after chipset code. This causes the chipset's Kconfig to be + * cloberred by the arch/x86/Kconfig if they have the same name. */ +static inline int smm_region_size(void) +{ + /* Make it 8MiB by default. */ + if (CONFIG_SMM_TSEG_SIZE == 0) + return (8 << 20); + return CONFIG_SMM_TSEG_SIZE; +} + +void *smm_region_start(void); + +#if !defined(__PRE_RAM__) && !defined(__SMM___) +void southcluster_smm_clear_state(void); +void southcluster_smm_enable_smi(void); +#endif + +#endif /* _BAYTRAIL_SMM_H_ */ diff --git a/src/soc/intel/baytrail/cpu.c b/src/soc/intel/baytrail/cpu.c index 4217947..c93d253 100644 --- a/src/soc/intel/baytrail/cpu.c +++ b/src/soc/intel/baytrail/cpu.c @@ -21,14 +21,27 @@ #include <console/console.h> #include <cpu/cpu.h> #include <cpu/intel/microcode.h> -#include <cpu/x86/mtrr.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/lapic.h> #include <cpu/x86/mp.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/mtrr.h> +#include <cpu/x86/smm.h>
#include <baytrail/pattrs.h> #include <baytrail/ramstage.h> +#include <baytrail/smm.h> + +static const void *microcode_ptr; + +static void smm_relocate(void *unused); +static void enable_smis(void *unused);
static struct mp_flight_record mp_steps[] = { + MP_FR_BLOCK_APS(smm_relocate, NULL, smm_relocate, NULL), MP_FR_BLOCK_APS(mp_initialize_cpu, NULL, mp_initialize_cpu, NULL), + /* Wait for APs to finish initialization before proceeding. */ + MP_FR_BLOCK_APS(NULL, NULL, enable_smis, NULL), };
/* The APIC id space on Bay Trail is sparse. Each id is separated by 2. */ @@ -48,13 +61,15 @@ void baytrail_init_cpus(device_t dev) x86_setup_var_mtrrs(pattrs->address_bits, 2); x86_mtrr_check();
+ /* Stash microcode. */ + microcode_ptr = intel_microcode_find(); + mp_params.num_cpus = pattrs->num_cpus, mp_params.parallel_microcode_load = 1, mp_params.adjust_apic_id = adjust_apic_id; mp_params.flight_plan = &mp_steps[0]; mp_params.num_records = ARRAY_SIZE(mp_steps); - mp_params.microcode_pointer = intel_microcode_find(); - mp_params.microcode_pointer = NULL; + mp_params.microcode_pointer = microcode_ptr;
if (mp_init(cpu_bus, &mp_params)) { printk(BIOS_ERR, "MP initialization failure.\n"); @@ -80,3 +95,148 @@ static const struct cpu_driver driver __cpu_driver = { .id_table = cpu_table, };
+ +/* + * SMM loading and initialization. + */ + +struct smm_relocation_attrs { + uint32_t smbase; + uint32_t smrr_base; + uint32_t smrr_mask; +}; + +static struct smm_relocation_attrs relo_attrs; + +static void adjust_apic_id_map(struct smm_loader_params *smm_params) +{ + int i; + struct smm_runtime *runtime = smm_params->runtime; + + for (i = 0; i < CONFIG_MAX_CPUS; i++) + runtime->apic_id_to_cpu[i] = mp_get_apic_id(i); +} + +static void asmlinkage +cpu_smm_do_relocation(void *arg, int cpu, const struct smm_runtime *runtime) +{ + msr_t smrr; + em64t100_smm_state_save_area_t *smm_state; + + if (cpu >= CONFIG_MAX_CPUS) { + printk(BIOS_CRIT, + "Invalid CPU number assigned in SMM stub: %d\n", cpu); + return; + } + + /* Set up SMRR. */ + smrr.lo = relo_attrs.smrr_base; + smrr.hi = 0; + wrmsr(SMRRphysBase_MSR, smrr); + smrr.lo = relo_attrs.smrr_mask; + smrr.hi = 0; + wrmsr(SMRRphysMask_MSR, smrr); + + /* The relocated handler runs with all CPUs concurrently. Therefore + * stagger the entry points adjusting SMBASE downwards by save state + * size * CPU num. */ + smm_state = (void *)(SMM_EM64T100_SAVE_STATE_OFFSET + runtime->smbase); + smm_state->smbase = relo_attrs.smbase - cpu * runtime->save_state_size; + printk(BIOS_DEBUG, "New SMBASE 0x%08x\n", smm_state->smbase); +} + +static int install_relocation_handler(int num_cpus) +{ + const int save_state_size = sizeof(em64t100_smm_state_save_area_t); + + struct smm_loader_params smm_params = { + .per_cpu_stack_size = save_state_size, + .num_concurrent_stacks = num_cpus, + .per_cpu_save_state_size = save_state_size, + .num_concurrent_save_states = 1, + .handler = (smm_handler_t)&cpu_smm_do_relocation, + }; + + if (smm_setup_relocation_handler(&smm_params)) + return -1; + + adjust_apic_id_map(&smm_params); + + return 0; +} + +static int install_permanent_handler(int num_cpus) +{ + /* There are num_cpus concurrent stacks and num_cpus concurrent save + * state areas. Lastly, set the stack size to the save state size. */ + int save_state_size = sizeof(em64t100_smm_state_save_area_t); + struct smm_loader_params smm_params = { + .per_cpu_stack_size = save_state_size, + .num_concurrent_stacks = num_cpus, + .per_cpu_save_state_size = save_state_size, + .num_concurrent_save_states = num_cpus, + }; + const int tseg_size = smm_region_size() - CONFIG_SMM_RESERVED_SIZE; + + printk(BIOS_DEBUG, "Installing SMM handler to 0x%08x\n", + relo_attrs.smbase); + + if (smm_load_module((void *)relo_attrs.smbase, tseg_size, &smm_params)) + return -1; + + adjust_apic_id_map(&smm_params); + + return 0; +} + +static int smm_load_handlers(void) +{ + /* All range registers are aligned to 4KiB */ + const uint32_t rmask = ~((1 << 12) - 1); + const struct pattrs *pattrs = pattrs_get(); + + /* Initialize global tracking state. */ + relo_attrs.smbase = (uint32_t)smm_region_start(); + relo_attrs.smrr_base = relo_attrs.smbase | MTRR_TYPE_WRBACK; + relo_attrs.smrr_mask = ~(smm_region_size() - 1) & rmask; + relo_attrs.smrr_mask |= MTRRphysMaskValid; + + /* Install handlers. */ + if (install_relocation_handler(pattrs->num_cpus) < 0) { + printk(BIOS_ERR, "Unable to install SMM relocation handler.\n"); + return -1; + } + + if (install_permanent_handler(pattrs->num_cpus) < 0) { + printk(BIOS_ERR, "Unable to install SMM permanent handler.\n"); + return -1; + } + + /* Ensure the SMM handlers hit DRAM before performing first SMI. */ + wbinvd(); + + return 0; +} + +static void smm_relocate(void *unused) +{ + /* Load relocation and permanent handler. */ + if (boot_cpu()) { + if (smm_load_handlers() < 0) { + printk(BIOS_ERR, "Error loading SMM handlers.\n"); + return; + } + southcluster_smm_clear_state(); + } + + /* Relocate SMM space. */ + smm_initiate_relocation(); + + /* Load microcode after SMM relocation. */ + intel_microcode_load_unlocked(microcode_ptr); +} + +static void enable_smis(void *unused) +{ + southcluster_smm_enable_smi(); +} diff --git a/src/soc/intel/baytrail/memmap.c b/src/soc/intel/baytrail/memmap.c index f958bae..f383d82 100644 --- a/src/soc/intel/baytrail/memmap.c +++ b/src/soc/intel/baytrail/memmap.c @@ -20,8 +20,14 @@ #include <arch/io.h> #include <cbmem.h> #include <baytrail/iosf.h> +#include <baytrail/smm.h> + +void *smm_region_start(void) +{ + return (void *)(iosf_bunit_read(BUNIT_SMRRL) << 20); +}
unsigned long get_top_of_ram(void) { - return (unsigned long)(iosf_bunit_read(BUNIT_SMRRL) << 20); + return (unsigned long)smm_region_start(); } diff --git a/src/soc/intel/baytrail/placeholders.c b/src/soc/intel/baytrail/placeholders.c index 8f2342a..63f0fb3 100644 --- a/src/soc/intel/baytrail/placeholders.c +++ b/src/soc/intel/baytrail/placeholders.c @@ -13,8 +13,6 @@ void acpi_create_serialio_ssdt(acpi_header_t *ssdt) {}
unsigned long acpi_fill_mcfg(unsigned long current) { return current; }
-void smm_setup_structures(void *gnvs, void *tcg, void *smi1) {} - void smm_init(void) {}
/* Rmodules don't like weak symbols. */ diff --git a/src/soc/intel/baytrail/pmutil.c b/src/soc/intel/baytrail/pmutil.c new file mode 100644 index 0000000..738f880 --- /dev/null +++ b/src/soc/intel/baytrail/pmutil.c @@ -0,0 +1,297 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <arch/io.h> +#include <console/console.h> + +#include <baytrail/lpc.h> +#include <baytrail/pci_devs.h> +#include <baytrail/pmc.h> + +#if defined(__SMM__) + +static const device_t pcu_dev = PCI_DEV(0, PCU_DEV, 0); + +static inline device_t get_pcu_dev(void) +{ + return pcu_dev; +} + +#else /* !__SMM__ */ +#include <device/device.h> +#include <device/pci.h> + +static device_t pcu_dev; +static device_t get_pcu_dev(void) +{ + if (pcu_dev == NULL) + pcu_dev = dev_find_slot(0, PCI_DEVFN(PCU_DEV, 0)); + return pcu_dev; +} +#endif + +uint16_t get_pmbase(void) +{ + return pci_read_config16(get_pcu_dev(), ABASE) & 0xfff8; +} + +static void print_status_bits(uint32_t status, const char *bit_names[]) +{ + int i; + + if (!status) + return; + + for (i = 31; i >= 0; i--) { + if (status & (1 << i)) { + if (bit_names[i]) + printk(BIOS_DEBUG, "%s ", bit_names[i]); + else + printk(BIOS_DEBUG, "BIT%d ", i); + } + } +} + +static uint32_t print_smi_status(uint32_t smi_sts) +{ + static const char *smi_sts_bits[] = { + [2] = "BIOS", + [4] = "SLP_SMI", + [5] = "APM", + [6] = "SWSMI_TMR", + [8] = "PM1", + [9] = "GPE0", + [12] = "DEVMON", + [13] = "TCO", + [14] = "PERIODIC", + [15] = "ILB", + [16] = "SMBUS_SMI", + [17] = "LEGACY_USB2", + [18] = "INTEL_USB2", + [20] = "PCI_EXP_SMI", + [26] = "SPI", + [28] = "PUNIT", + [29] = "GUNIT", + }; + + if (!smi_sts) + return 0; + + printk(BIOS_DEBUG, "SMI_STS: "); + print_status_bits(smi_sts, smi_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return smi_sts; +} + +static uint32_t reset_smi_status(void) +{ + uint16_t pmbase = get_pmbase(); + uint32_t smi_sts = inl(pmbase + SMI_STS); + outl(smi_sts, pmbase + SMI_STS); + return smi_sts; +} + +uint32_t clear_smi_status(void) +{ + return print_smi_status(reset_smi_status()); +} + +void enable_smi(uint32_t mask) +{ + uint16_t pmbase = get_pmbase(); + uint32_t smi_en = inl(pmbase + SMI_EN); + smi_en |= mask; + outl(smi_en, pmbase + SMI_EN); +} + +void disable_smi(uint32_t mask) +{ + uint16_t pmbase = get_pmbase(); + uint32_t smi_en = inl(pmbase + SMI_EN); + smi_en &= ~mask; + outl(smi_en, pmbase + SMI_EN); +} + +void enable_pm1_control(uint32_t mask) +{ + uint16_t pmbase = get_pmbase(); + uint32_t pm1_cnt = inl(pmbase + PM1_CNT); + pm1_cnt |= mask; + outl(pm1_cnt, pmbase + PM1_CNT); +} + +void disable_pm1_control(uint32_t mask) +{ + uint16_t pmbase = get_pmbase(); + uint32_t pm1_cnt = inl(pmbase + PM1_CNT); + pm1_cnt &= ~mask; + outl(pm1_cnt, pmbase + PM1_CNT); +} + +static uint16_t reset_pm1_status(void) +{ + uint16_t pmbase = get_pmbase(); + uint16_t pm1_sts = inw(pmbase + PM1_STS); + outw(pm1_sts, pmbase + PM1_STS); + return pm1_sts; +} + +static uint16_t print_pm1_status(uint16_t pm1_sts) +{ + static const char *pm1_sts_bits[] = { + [0] = "TMROF", + [5] = "GBL", + [8] = "PWRBTN", + [10] = "RTC", + [11] = "PRBTNOR", + [13] = "USB", + [14] = "PCIEXPWAK", + [15] = "WAK", + }; + + if (!pm1_sts) + return 0; + + printk(BIOS_SPEW, "PM1_STS: "); + print_status_bits(pm1_sts, pm1_sts_bits); + printk(BIOS_SPEW, "\n"); + + return pm1_sts; +} + +uint16_t clear_pm1_status(void) +{ + return print_pm1_status(reset_pm1_status()); +} + +void enable_pm1(uint16_t events) +{ + outw(events, get_pmbase() + PM1_EN); +} + +static uint32_t print_tco_status(uint32_t tco_sts) +{ + static const char *tco_sts_bits[] = { + [3] = "TIMEOUT", + [17] = "SECOND_TO", + }; + + if (!tco_sts) + return 0; + + printk(BIOS_DEBUG, "TCO_STS: "); + print_status_bits(tco_sts, tco_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return tco_sts; +} + +static uint32_t reset_tco_status(void) +{ + uint16_t pmbase = get_pmbase(); + uint32_t tco_sts = inl(pmbase + TCO_STS); + uint32_t tco_en = inl(pmbase + TCO1_CNT); + + outl(tco_sts, pmbase + TCO_STS); + return tco_sts & tco_en; +} + +uint32_t clear_tco_status(void) +{ + return print_tco_status(reset_tco_status()); +} + +void enable_gpe(uint32_t mask) +{ + uint16_t pmbase = get_pmbase(); + uint32_t gpe0_en = inl(pmbase + GPE0_EN); + gpe0_en |= mask; + outl(gpe0_en, pmbase + GPE0_EN); +} + +void disable_gpe(uint32_t mask) +{ + uint16_t pmbase = get_pmbase(); + uint32_t gpe0_en = inl(pmbase + GPE0_EN); + gpe0_en &= ~mask; + outl(gpe0_en, pmbase + GPE0_EN); +} + +void disable_all_gpe(void) +{ + disable_gpe(~0); +} + + +static uint32_t reset_gpe_status(void) +{ + uint16_t pmbase = get_pmbase(); + uint32_t gpe_sts = inl(pmbase + GPE0_STS); + outl(gpe_sts, pmbase + GPE0_STS); + return gpe_sts; +} + +static uint32_t print_gpe_sts(uint32_t gpe_sts) +{ + static const char *gpe_sts_bits[] = { + [1] = "HOTPLUG", + [2] = "SWGPE", + [3] = "PCIE_WAKE0", + [4] = "PUNIT", + [5] = "GUNIT", + [6] = "PCIE_WAKE1", + [7] = "PCIE_WAKE2", + [8] = "PCIE_WAKE3", + [9] = "PCI_EXP", + [10] = "BATLOW", + [13] = "PME_B0", + [16] = "SUS_GPIO_0", + [17] = "SUS_GPIO_1", + [18] = "SUS_GPIO_2", + [19] = "SUS_GPIO_3", + [20] = "SUS_GPIO_4", + [21] = "SUS_GPIO_5", + [22] = "SUS_GPIO_6", + [23] = "SUS_GPIO_7", + [24] = "CORE_GPIO_0", + [25] = "CORE_GPIO_1", + [26] = "CORE_GPIO_2", + [27] = "CORE_GPIO_3", + [28] = "CORE_GPIO_4", + [29] = "CORE_GPIO_5", + [30] = "CORE_GPIO_6", + [31] = "CORE_GPIO_7", + }; + + if (!gpe_sts) + return gpe_sts; + + printk(BIOS_DEBUG, "GPE0a_STS: "); + print_status_bits(gpe_sts, gpe_sts_bits); + printk(BIOS_DEBUG, "\n"); + + return gpe_sts; +} + +uint32_t clear_gpe_status(void) +{ + return print_gpe_sts(reset_gpe_status()); +} diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c index 3ae52cf..10028ca 100644 --- a/src/soc/intel/baytrail/romstage/romstage.c +++ b/src/soc/intel/baytrail/romstage/romstage.c @@ -36,6 +36,7 @@ #include <baytrail/pci_devs.h> #include <baytrail/reset.h> #include <baytrail/romstage.h> +#include <baytrail/smm.h>
static inline uint64_t timestamp_get(void) { @@ -282,13 +283,13 @@ struct ramstage_cache *ramstage_cache_location(long *size) { char *smm_base; /* 1MiB cache size */ - const long cache_size = (1 << 20); + const long cache_size = CONFIG_SMM_RESERVED_SIZE;
/* Ramstage cache lives in TSEG region which is the definition of * cbmem_top(). */ smm_base = cbmem_top(); *size = cache_size; - return (void *)&smm_base[CONFIG_SMM_TSEG_SIZE - cache_size]; + return (void *)&smm_base[smm_region_size() - cache_size]; }
void ramstage_cache_invalid(struct ramstage_cache *cache) diff --git a/src/soc/intel/baytrail/smihandler.c b/src/soc/intel/baytrail/smihandler.c new file mode 100644 index 0000000..d5f6aa6 --- /dev/null +++ b/src/soc/intel/baytrail/smihandler.c @@ -0,0 +1,399 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <stdlib.h> +#include <arch/hlt.h> +#include <arch/io.h> +#include <console/console.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/smm.h> +#include <device/pci_def.h> +#include <elog.h> + +#include <baytrail/pci_devs.h> +#include <baytrail/pmc.h> +#include <baytrail/nvs.h> + +/* GNVS needs to be set by coreboot initiating a software SMI. */ +static global_nvs_t *gnvs; +static int smm_initialized; + +int southbridge_io_trap_handler(int smif) +{ + switch (smif) { + case 0x32: + printk(BIOS_DEBUG, "OS Init\n"); + /* gnvs->smif: + * On success, the IO Trap Handler returns 0 + * On failure, the IO Trap Handler returns a value != 0 + */ + gnvs->smif = 0; + return 1; /* IO trap handled */ + } + + /* Not handled */ + return 0; +} + +void southbridge_smi_set_eos(void) +{ + enable_smi(EOS); +} + +global_nvs_t *smm_get_gnvs(void) +{ + return gnvs; +} + +static void busmaster_disable_on_bus(int bus) +{ + int slot, func; + unsigned int val; + unsigned char hdr; + + for (slot = 0; slot < 0x20; slot++) { + for (func = 0; func < 8; func++) { + u32 reg32; + device_t dev = PCI_DEV(bus, slot, func); + + val = pci_read_config32(dev, PCI_VENDOR_ID); + + if (val == 0xffffffff || val == 0x00000000 || + val == 0x0000ffff || val == 0xffff0000) + continue; + + /* Disable Bus Mastering for this one device */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 &= ~PCI_COMMAND_MASTER; + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* If this is a bridge, then follow it. */ + hdr = pci_read_config8(dev, PCI_HEADER_TYPE); + hdr &= 0x7f; + if (hdr == PCI_HEADER_TYPE_BRIDGE || + hdr == PCI_HEADER_TYPE_CARDBUS) { + unsigned int buses; + buses = pci_read_config32(dev, PCI_PRIMARY_BUS); + busmaster_disable_on_bus((buses >> 8) & 0xff); + } + } + } +} + +static void southbridge_smi_sleep(void) +{ + uint32_t reg32; + uint8_t slp_typ; + uint16_t pmbase = get_pmbase(); + + /* First, disable further SMIs */ + disable_smi(SLP_SMI_EN); + + /* Figure out SLP_TYP */ + reg32 = inl(pmbase + PM1_CNT); + printk(BIOS_SPEW, "SMI#: SLP = 0x%08x\n", reg32); + slp_typ = (reg32 >> 10) & 7; + + /* Do any mainboard sleep handling */ + mainboard_smi_sleep(slp_typ-2); + +#if CONFIG_ELOG_GSMI + /* Log S3, S4, and S5 entry */ + if (slp_typ >= 5) + elog_add_event_byte(ELOG_TYPE_ACPI_ENTER, slp_typ-2); +#endif + + /* Next, do the deed. + */ + + switch (slp_typ) { + case SLP_TYP_S0: + printk(BIOS_DEBUG, "SMI#: Entering S0 (On)\n"); + break; + case SLP_TYP_S1: + printk(BIOS_DEBUG, "SMI#: Entering S1 (Assert STPCLK#)\n"); + break; + case SLP_TYP_S3: + printk(BIOS_DEBUG, "SMI#: Entering S3 (Suspend-To-RAM)\n"); + + /* Invalidate the cache before going to S3 */ + wbinvd(); + break; + case SLP_TYP_S4: + printk(BIOS_DEBUG, "SMI#: Entering S4 (Suspend-To-Disk)\n"); + break; + case SLP_TYP_S5: + printk(BIOS_DEBUG, "SMI#: Entering S5 (Soft Power off)\n"); + + /* Disable all GPE */ + disable_all_gpe(); + + /* also iterates over all bridges on bus 0 */ + busmaster_disable_on_bus(0); + break; + default: + printk(BIOS_DEBUG, "SMI#: ERROR: SLP_TYP reserved\n"); + break; + } + + /* Write back to the SLP register to cause the originally intended + * event again. We need to set BIT13 (SLP_EN) though to make the + * sleep happen. + */ + enable_pm1_control(SLP_EN); + + /* Make sure to stop executing code here for S3/S4/S5 */ + if (slp_typ > 1) + hlt(); + + /* In most sleep states, the code flow of this function ends at + * the line above. However, if we entered sleep state S1 and wake + * up again, we will continue to execute code in this function. + */ + reg32 = inl(pmbase + PM1_CNT); + if (reg32 & SCI_EN) { + /* The OS is not an ACPI OS, so we set the state to S0 */ + disable_pm1_control(SLP_EN | SLP_TYP); + } +} + +/* + * Look for Synchronous IO SMI and use save state from that + * core in case we are not running on the same core that + * initiated the IO transaction. + */ +static em64t100_smm_state_save_area_t *smi_apmc_find_state_save(uint8_t cmd) +{ + em64t100_smm_state_save_area_t *state; + int node; + + /* Check all nodes looking for the one that issued the IO */ + for (node = 0; node < CONFIG_MAX_CPUS; node++) { + state = smm_get_save_state(node); + + /* Check for Synchronous IO (bit0==1) */ + if (!(state->io_misc_info & (1 << 0))) + continue; + + /* Make sure it was a write (bit4==0) */ + if (state->io_misc_info & (1 << 4)) + continue; + + /* Check for APMC IO port */ + if (((state->io_misc_info >> 16) & 0xff) != APM_CNT) + continue; + + /* Check AX against the requested command */ + if ((state->rax & 0xff) != cmd) + continue; + + return state; + } + + return NULL; +} + +#if CONFIG_ELOG_GSMI +static void southbridge_smi_gsmi(void) +{ + u32 *ret, *param; + uint8_t sub_command; + em64t100_smm_state_save_area_t *io_smi = + smi_apmc_find_state_save(ELOG_GSMI_APM_CNT); + + if (!io_smi) + return; + + /* Command and return value in EAX */ + ret = (u32*)&io_smi->rax; + sub_command = (uint8_t)(*ret >> 8); + + /* Parameter buffer in EBX */ + param = (u32*)&io_smi->rbx; + + /* drivers/elog/gsmi.c */ + *ret = gsmi_exec(sub_command, param); +} +#endif +static void southbridge_smi_apmc(void) +{ + uint8_t reg8; + em64t100_smm_state_save_area_t *state; + + /* Emulate B2 register as the FADT / Linux expects it */ + + reg8 = inb(APM_CNT); + switch (reg8) { + case APM_CNT_CST_CONTROL: + /* Calling this function seems to cause + * some kind of race condition in Linux + * and causes a kernel oops + */ + printk(BIOS_DEBUG, "C-state control\n"); + break; + case APM_CNT_PST_CONTROL: + /* Calling this function seems to cause + * some kind of race condition in Linux + * and causes a kernel oops + */ + printk(BIOS_DEBUG, "P-state control\n"); + break; + case APM_CNT_ACPI_DISABLE: + disable_pm1_control(SCI_EN); + printk(BIOS_DEBUG, "SMI#: ACPI disabled.\n"); + break; + case APM_CNT_ACPI_ENABLE: + enable_pm1_control(SCI_EN); + printk(BIOS_DEBUG, "SMI#: ACPI enabled.\n"); + break; + case APM_CNT_GNVS_UPDATE: + if (smm_initialized) { + printk(BIOS_DEBUG, + "SMI#: SMM structures already initialized!\n"); + return; + } + state = smi_apmc_find_state_save(reg8); + if (state) { + /* EBX in the state save contains the GNVS pointer */ + gnvs = (global_nvs_t *)((uint32_t)state->rbx); + smm_initialized = 1; + printk(BIOS_DEBUG, "SMI#: Setting GNVS to %p\n", gnvs); + } + break; +#if CONFIG_ELOG_GSMI + case ELOG_GSMI_APM_CNT: + southbridge_smi_gsmi(); + break; +#endif + } + + mainboard_smi_apmc(reg8); +} + +static void southbridge_smi_pm1(void) +{ + uint16_t pm1_sts = clear_pm1_status(); + + /* While OSPM is not active, poweroff immediately + * on a power button event. + */ + if (pm1_sts & PWRBTN_STS) { + // power button pressed +#if CONFIG_ELOG_GSMI + elog_add_event(ELOG_TYPE_POWER_BUTTON); +#endif + disable_pm1_control(-1UL); + enable_pm1_control(SLP_EN | (SLP_TYP_S5 << 10)); + } +} + +static void southbridge_smi_gpe0(void) +{ + clear_gpe_status(); +} + +static void southbridge_smi_tco(void) +{ + uint32_t tco_sts = clear_tco_status(); + + /* Any TCO event? */ + if (!tco_sts) + return; + + if (tco_sts & TCO_TIMEOUT) { /* TIMEOUT */ + /* Handle TCO timeout */ + printk(BIOS_DEBUG, "TCO Timeout.\n"); + } +} + +static void southbridge_smi_periodic(void) +{ + uint32_t reg32; + + reg32 = inl(get_pmbase() + SMI_EN); + + /* Are periodic SMIs enabled? */ + if ((reg32 & PERIODIC_EN) == 0) + return; + + printk(BIOS_DEBUG, "Periodic SMI.\n"); +} + +typedef void (*smi_handler_t)(void); + +static const smi_handler_t southbridge_smi[32] = { + NULL, // [0] reserved + NULL, // [1] reserved + NULL, // [2] BIOS_STS + NULL, // [3] LEGACY_USB_STS + southbridge_smi_sleep, // [4] SLP_SMI_STS + southbridge_smi_apmc, // [5] APM_STS + NULL, // [6] SWSMI_TMR_STS + NULL, // [7] reserved + southbridge_smi_pm1, // [8] PM1_STS + southbridge_smi_gpe0, // [9] GPE0_STS + NULL, // [10] reserved + NULL, // [11] reserved + NULL, // [12] reserved + southbridge_smi_tco, // [13] TCO_STS + southbridge_smi_periodic, // [14] PERIODIC_STS + NULL, // [15] SERIRQ_SMI_STS + NULL, // [16] SMBUS_SMI_STS + NULL, // [17] LEGACY_USB2_STS + NULL, // [18] INTEL_USB2_STS + NULL, // [19] reserved + NULL, // [20] PCI_EXP_SMI_STS + NULL, // [21] reserved + NULL, // [22] reserved + NULL, // [23] reserved + NULL, // [24] reserved + NULL, // [25] reserved + NULL, // [26] SPI_STS + NULL, // [27] reserved + NULL, // [28] PUNIT + NULL, // [29] GUNIT + NULL, // [30] reserved + NULL // [31] reserved +}; + +void southbridge_smi_handler(void) +{ + int i; + uint32_t smi_sts; + + /* We need to clear the SMI status registers, or we won't see what's + * happening in the following calls. + */ + smi_sts = clear_smi_status(); + + /* Call SMI sub handler for each of the status bits */ + for (i = 0; i < ARRAY_SIZE(southbridge_smi); i++) { + if (!(smi_sts & (1 << i))) + continue; + + if (southbridge_smi[i] != NULL) { + southbridge_smi[i](); + } else { + printk(BIOS_DEBUG, + "SMI_STS[%d] occured, but no " + "handler available.\n", i); + } + } +} diff --git a/src/soc/intel/baytrail/smm.c b/src/soc/intel/baytrail/smm.c new file mode 100644 index 0000000..124f93b --- /dev/null +++ b/src/soc/intel/baytrail/smm.c @@ -0,0 +1,91 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <device/device.h> +#include <device/pci.h> +#include <console/console.h> +#include <arch/io.h> +#include <cpu/cpu.h> +#include <cpu/x86/smm.h> +#include <string.h> + +#include <baytrail/pmc.h> +#include <baytrail/smm.h> + +void southcluster_smm_clear_state(void) +{ + uint32_t smi_en; + + /* Log events from chipset before clearing */ + southcluster_log_state(); + + printk(BIOS_DEBUG, "Initializing Southbridge SMI..."); + printk(BIOS_SPEW, " pmbase = 0x%04x\n", get_pmbase()); + + smi_en = inl(get_pmbase() + SMI_EN); + if (smi_en & APMC_EN) { + printk(BIOS_INFO, "SMI# handler already enabled?\n"); + return; + } + + /* Dump and clear status registers */ + clear_smi_status(); + clear_pm1_status(); + clear_tco_status(); + clear_gpe_status(); +} + +void southcluster_smm_enable_smi(void) +{ + printk(BIOS_DEBUG, "Enabling SMIs.\n"); + /* Configure events */ + enable_pm1(PWRBTN_EN | GBL_EN); + disable_gpe(PME_B0_EN); + + /* Enable SMI generation: + * - on TCO events + * - on APMC writes (io 0xb2) + * - on writes to SLP_EN (sleep states) + * - on writes to GBL_RLS (bios commands) + * No SMIs: + * - on microcontroller writes (io 0x62/0x66) + */ + enable_smi(TCO_EN | APMC_EN | SLP_SMI_EN | GBL_SMI_EN | EOS); +} + +void smm_setup_structures(void *gnvs, void *tcg, void *smi1) +{ + /* + * Issue SMI to set the gnvs pointer in SMM. + * tcg and smi1 are unused. + * + * EAX = APM_CNT_GNVS_UPDATE + * EBX = gnvs pointer + * EDX = APM_CNT + */ + asm volatile ( + "outb %%al, %%dx\n\t" + : /* ignore result */ + : "a" (APM_CNT_GNVS_UPDATE), + "b" ((uint32_t)gnvs), + "d" (APM_CNT) + ); +} diff --git a/src/soc/intel/baytrail/tsc_freq.c b/src/soc/intel/baytrail/tsc_freq.c index 3b662fe..6ee5c16 100644 --- a/src/soc/intel/baytrail/tsc_freq.c +++ b/src/soc/intel/baytrail/tsc_freq.c @@ -21,11 +21,6 @@ #include <cpu/x86/msr.h> #include <cpu/x86/tsc.h> #include <baytrail/msr.h> -#if !defined(__PRE_RAM__) -#include <baytrail/ramstage.h> -#else -#include <baytrail/romstage.h> -#endif
unsigned long tsc_freq_mhz(void) { @@ -44,6 +39,13 @@ unsigned long tsc_freq_mhz(void) return (bclk_khz * ((platform_info.lo >> 8) & 0xff)) / 1000; }
+#if !defined(__SMM__) +#if !defined(__PRE_RAM__) +#include <baytrail/ramstage.h> +#else +#include <baytrail/romstage.h> +#endif + void set_max_freq(void) { msr_t perf_ctl; @@ -66,3 +68,5 @@ void set_max_freq(void)
wrmsr(MSR_IA32_PERF_CTL, perf_ctl); } + +#endif /* __SMM__ */