diff options
Diffstat (limited to 'src/southbridge/intel/common')
| -rw-r--r-- | src/southbridge/intel/common/Kconfig | 3 | ||||
| -rw-r--r-- | src/southbridge/intel/common/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/southbridge/intel/common/pmutil.c | 242 | ||||
| -rw-r--r-- | src/southbridge/intel/common/pmutil.h | 127 | ||||
| -rw-r--r-- | src/southbridge/intel/common/smi.c | 161 | ||||
| -rw-r--r-- | src/southbridge/intel/common/smihandler.c | 527 |
6 files changed, 1063 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/Kconfig b/src/southbridge/intel/common/Kconfig index 0d2e3b1690..4f8a407490 100644 --- a/src/southbridge/intel/common/Kconfig +++ b/src/southbridge/intel/common/Kconfig @@ -22,6 +22,9 @@ config SOUTHBRIDGE_INTEL_COMMON_RCBA_PIRQ config HAVE_INTEL_CHIPSET_LOCKDOWN def_bool n +config SOUTHBRIDGE_INTEL_COMMON_SMM + def_bool n + config INTEL_CHIPSET_LOCKDOWN depends on HAVE_INTEL_CHIPSET_LOCKDOWN && HAVE_SMI_HANDLER && !CHROMEOS #ChromeOS's payload seems to handle finalization on its on. diff --git a/src/southbridge/intel/common/Makefile.inc b/src/southbridge/intel/common/Makefile.inc index 2feefcb96a..f5534c8399 100644 --- a/src/southbridge/intel/common/Makefile.inc +++ b/src/southbridge/intel/common/Makefile.inc @@ -36,4 +36,7 @@ endif ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_PIRQ_ACPI_GEN) += acpi_pirq_gen.c ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_RCBA_PIRQ) += rcba_pirq.c +ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMM) += pmutil.c smi.c +smm-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMM) += pmutil.c smihandler.c + endif diff --git a/src/southbridge/intel/common/pmutil.c b/src/southbridge/intel/common/pmutil.c new file mode 100644 index 0000000000..97df2010fa --- /dev/null +++ b/src/southbridge/intel/common/pmutil.c @@ -0,0 +1,242 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 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. + */ + +#include <types.h> +#include <arch/io.h> +#include <console/console.h> +#include <cpu/x86/cache.h> +#include <device/pci_def.h> +#include <cpu/x86/smm.h> +#include <elog.h> +#include <pc80/mc146818rtc.h> + +#include <southbridge/intel/common/gpio.h> + +#include "pmutil.h" + +void alt_gpi_mask(u16 clr, u16 set) +{ + u16 pmbase = get_pmbase(); + u16 alt_gp = inw(pmbase + ALT_GP_SMI_EN); + alt_gp &= ~clr; + alt_gp |= set; + outw(alt_gp, pmbase + ALT_GP_SMI_EN); +} + +void gpe0_mask(u32 clr, u32 set) +{ + u16 pmbase = get_pmbase(); + u32 gpe0 = inl(pmbase + GPE0_EN); + gpe0 &= ~clr; + gpe0 |= set; + outl(gpe0, pmbase + GPE0_EN); +} + +/** + * @brief read and clear PM1_STS + * @return PM1_STS register + */ +u16 reset_pm1_status(void) +{ + u16 pmbase = get_pmbase(); + u16 reg16; + + reg16 = inw(pmbase + PM1_STS); + /* set status bits are cleared by writing 1 to them */ + outw(reg16, pmbase + PM1_STS); + + return reg16; +} + +void dump_pm1_status(u16 pm1_sts) +{ + printk(BIOS_SPEW, "PM1_STS: "); + if (pm1_sts & (1 << 15)) printk(BIOS_SPEW, "WAK "); + if (pm1_sts & (1 << 14)) printk(BIOS_SPEW, "PCIEXPWAK "); + if (pm1_sts & (1 << 11)) printk(BIOS_SPEW, "PRBTNOR "); + if (pm1_sts & (1 << 10)) printk(BIOS_SPEW, "RTC "); + if (pm1_sts & (1 << 8)) printk(BIOS_SPEW, "PWRBTN "); + if (pm1_sts & (1 << 5)) printk(BIOS_SPEW, "GBL "); + if (pm1_sts & (1 << 4)) printk(BIOS_SPEW, "BM "); + if (pm1_sts & (1 << 0)) printk(BIOS_SPEW, "TMROF "); + printk(BIOS_SPEW, "\n"); + int reg16 = inw(get_pmbase() + PM1_EN); + printk(BIOS_SPEW, "PM1_EN: %x\n", reg16); +} + +/** + * @brief read and clear SMI_STS + * @return SMI_STS register + */ +u32 reset_smi_status(void) +{ + u16 pmbase = get_pmbase(); + u32 reg32; + + reg32 = inl(pmbase + SMI_STS); + /* set status bits are cleared by writing 1 to them */ + outl(reg32, pmbase + SMI_STS); + + return reg32; +} + +void dump_smi_status(u32 smi_sts) +{ + printk(BIOS_DEBUG, "SMI_STS: "); + if (smi_sts & (1 << 26)) printk(BIOS_DEBUG, "SPI "); + if (smi_sts & (1 << 21)) printk(BIOS_DEBUG, "MONITOR "); + if (smi_sts & (1 << 20)) printk(BIOS_DEBUG, "PCI_EXP_SMI "); + if (smi_sts & (1 << 18)) printk(BIOS_DEBUG, "INTEL_USB2 "); + if (smi_sts & (1 << 17)) printk(BIOS_DEBUG, "LEGACY_USB2 "); + if (smi_sts & (1 << 16)) printk(BIOS_DEBUG, "SMBUS_SMI "); + if (smi_sts & (1 << 15)) printk(BIOS_DEBUG, "SERIRQ_SMI "); + if (smi_sts & (1 << 14)) printk(BIOS_DEBUG, "PERIODIC "); + if (smi_sts & (1 << 13)) printk(BIOS_DEBUG, "TCO "); + if (smi_sts & (1 << 12)) printk(BIOS_DEBUG, "DEVMON "); + if (smi_sts & (1 << 11)) printk(BIOS_DEBUG, "MCSMI "); + if (smi_sts & (1 << 10)) printk(BIOS_DEBUG, "GPI "); + if (smi_sts & (1 << 9)) printk(BIOS_DEBUG, "GPE0 "); + if (smi_sts & (1 << 8)) printk(BIOS_DEBUG, "PM1 "); + if (smi_sts & (1 << 6)) printk(BIOS_DEBUG, "SWSMI_TMR "); + if (smi_sts & (1 << 5)) printk(BIOS_DEBUG, "APM "); + if (smi_sts & (1 << 4)) printk(BIOS_DEBUG, "SLP_SMI "); + if (smi_sts & (1 << 3)) printk(BIOS_DEBUG, "LEGACY_USB "); + if (smi_sts & (1 << 2)) printk(BIOS_DEBUG, "BIOS "); + printk(BIOS_DEBUG, "\n"); +} + + +/** + * @brief read and clear GPE0_STS + * @return GPE0_STS register + */ +u64 reset_gpe0_status(void) +{ + u16 pmbase = get_pmbase(); + u32 reg_h, reg_l; + + reg_l = inl(pmbase + GPE0_STS); + reg_h = inl(pmbase + GPE0_STS + 4); + /* set status bits are cleared by writing 1 to them */ + outl(reg_l, pmbase + GPE0_STS); + outl(reg_h, pmbase + GPE0_STS + 4); + + return (((u64)reg_h) << 32) | reg_l; +} + +void dump_gpe0_status(u64 gpe0_sts) +{ + int i; + printk(BIOS_DEBUG, "GPE0_STS: "); + if (gpe0_sts & (1LL << 32)) printk(BIOS_DEBUG, "USB6 "); + for (i=31; i>= 16; i--) { + if (gpe0_sts & (1 << i)) printk(BIOS_DEBUG, "GPIO%d ", (i-16)); + } + if (gpe0_sts & (1 << 14)) printk(BIOS_DEBUG, "USB4 "); + if (gpe0_sts & (1 << 13)) printk(BIOS_DEBUG, "PME_B0 "); + if (gpe0_sts & (1 << 12)) printk(BIOS_DEBUG, "USB3 "); + if (gpe0_sts & (1 << 11)) printk(BIOS_DEBUG, "PME "); + if (gpe0_sts & (1 << 10)) printk(BIOS_DEBUG, "EL_SCI/BATLOW "); + if (gpe0_sts & (1 << 9)) printk(BIOS_DEBUG, "PCI_EXP "); + if (gpe0_sts & (1 << 8)) printk(BIOS_DEBUG, "RI "); + if (gpe0_sts & (1 << 7)) printk(BIOS_DEBUG, "SMB_WAK "); + if (gpe0_sts & (1 << 6)) printk(BIOS_DEBUG, "TCO_SCI "); + if (gpe0_sts & (1 << 5)) printk(BIOS_DEBUG, "USB5 "); + if (gpe0_sts & (1 << 4)) printk(BIOS_DEBUG, "USB2 "); + if (gpe0_sts & (1 << 3)) printk(BIOS_DEBUG, "USB1 "); + if (gpe0_sts & (1 << 2)) printk(BIOS_DEBUG, "SWGPE "); + if (gpe0_sts & (1 << 1)) printk(BIOS_DEBUG, "HOT_PLUG "); + if (gpe0_sts & (1 << 0)) printk(BIOS_DEBUG, "THRM "); + printk(BIOS_DEBUG, "\n"); +} + +/** + * @brief read and clear TCOx_STS + * @return TCOx_STS registers + */ +u32 reset_tco_status(void) +{ + u32 tcobase = get_pmbase() + 0x60; + u32 reg32; + + reg32 = inl(tcobase + 0x04); + /* set status bits are cleared by writing 1 to them */ + outl(reg32 & ~(1<<18), tcobase + 0x04); // Don't clear BOOT_STS before SECOND_TO_STS + if (reg32 & (1 << 18)) + outl(reg32 & (1<<18), tcobase + 0x04); // clear BOOT_STS + + return reg32; +} + + +void dump_tco_status(u32 tco_sts) +{ + printk(BIOS_DEBUG, "TCO_STS: "); + if (tco_sts & (1 << 20)) printk(BIOS_DEBUG, "SMLINK_SLV "); + if (tco_sts & (1 << 18)) printk(BIOS_DEBUG, "BOOT "); + if (tco_sts & (1 << 17)) printk(BIOS_DEBUG, "SECOND_TO "); + if (tco_sts & (1 << 16)) printk(BIOS_DEBUG, "INTRD_DET "); + if (tco_sts & (1 << 12)) printk(BIOS_DEBUG, "DMISERR "); + if (tco_sts & (1 << 10)) printk(BIOS_DEBUG, "DMISMI "); + if (tco_sts & (1 << 9)) printk(BIOS_DEBUG, "DMISCI "); + if (tco_sts & (1 << 8)) printk(BIOS_DEBUG, "BIOSWR "); + if (tco_sts & (1 << 7)) printk(BIOS_DEBUG, "NEWCENTURY "); + if (tco_sts & (1 << 3)) printk(BIOS_DEBUG, "TIMEOUT "); + if (tco_sts & (1 << 2)) printk(BIOS_DEBUG, "TCO_INT "); + if (tco_sts & (1 << 1)) printk(BIOS_DEBUG, "SW_TCO "); + if (tco_sts & (1 << 0)) printk(BIOS_DEBUG, "NMI2SMI "); + printk(BIOS_DEBUG, "\n"); +} + +/** + * @brief Set the EOS bit + */ +void smi_set_eos(void) +{ + u16 pmbase = get_pmbase(); + u8 reg8; + + reg8 = inb(pmbase + SMI_EN); + reg8 |= EOS; + outb(reg8, pmbase + SMI_EN); +} + + +void dump_alt_gp_smi_status(u16 alt_gp_smi_sts) +{ + int i; + printk(BIOS_DEBUG, "ALT_GP_SMI_STS: "); + for (i=15; i>= 0; i--) { + if (alt_gp_smi_sts & (1 << i)) printk(BIOS_DEBUG, "GPI%d ", i); + } + printk(BIOS_DEBUG, "\n"); +} + +/** + * @brief read and clear ALT_GP_SMI_STS + * @return ALT_GP_SMI_STS register + */ +u16 reset_alt_gp_smi_status(void) +{ + u16 pmbase = get_pmbase(); + u16 reg16; + + reg16 = inl(pmbase + ALT_GP_SMI_STS); + /* set status bits are cleared by writing 1 to them */ + outl(reg16, pmbase + ALT_GP_SMI_STS); + + return reg16; +} diff --git a/src/southbridge/intel/common/pmutil.h b/src/southbridge/intel/common/pmutil.h new file mode 100644 index 0000000000..e2b6e5828d --- /dev/null +++ b/src/southbridge/intel/common/pmutil.h @@ -0,0 +1,127 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 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. + */ + +#ifndef INTEL_COMMON_PMUTIL_H +#define INTEL_COMMON_PMUTIL_H + +#define D31F0_PMBASE 0x40 +#define D31F0_GEN_PMCON_3 0xa4 +#define D31F0_GPIO_ROUT 0xb8 +#define GPI_DISABLE 0x00 +#define GPI_IS_SMI 0x01 +#define GPI_IS_SCI 0x02 +#define GPI_IS_NMI 0x03 + + +#define MAINBOARD_POWER_OFF 0 +#define MAINBOARD_POWER_ON 1 +#define MAINBOARD_POWER_KEEP 2 + +#ifndef CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL +#define CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL MAINBOARD_POWER_ON +#endif + +#define PM1_STS 0x00 +#define WAK_STS (1 << 15) +#define PCIEXPWAK_STS (1 << 14) +#define PRBTNOR_STS (1 << 11) +#define RTC_STS (1 << 10) +#define PWRBTN_STS (1 << 8) +#define GBL_STS (1 << 5) +#define BM_STS (1 << 4) +#define TMROF_STS (1 << 0) +#define PM1_EN 0x02 +#define PCIEXPWAK_DIS (1 << 14) +#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 GBL_RLS (1 << 2) +#define BM_RLD (1 << 1) +#define SCI_EN (1 << 0) +#define PM1_TMR 0x08 +#define PROC_CNT 0x10 +#define LV2 0x14 +#define LV3 0x15 +#define LV4 0x16 +#define PM2_CNT 0x50 // mobile only +#define GPE0_STS 0x20 +#define PME_B0_STS (1 << 13) +#define PME_STS (1 << 11) +#define BATLOW_STS (1 << 10) +#define PCI_EXP_STS (1 << 9) +#define RI_STS (1 << 8) +#define SMB_WAK_STS (1 << 7) +#define TCOSCI_STS (1 << 6) +#define SWGPE_STS (1 << 2) +#define HOT_PLUG_STS (1 << 1) +#define GPE0_EN 0x28 +#define PME_B0_EN (1 << 13) +#define PME_EN (1 << 11) +#define TCOSCI_EN (1 << 6) +#define SMI_EN 0x30 +#define INTEL_USB2_EN (1 << 18) // Intel-Specific USB2 SMI logic +#define LEGACY_USB2_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 MCSMI_EN (1 << 11) // Trap microcontroller range access +#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 LEGACY_USB_EN (1 << 3) // Legacy USB circuit SMI logic +#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_GP_SMI_EN 0x38 +#define ALT_GP_SMI_STS 0x3a +#define GPE_CNTL 0x42 +#define DEVACT_STS 0x44 +#define SS_CNT 0x50 +#define C3_RES 0x54 +#define TCO1_STS 0x64 +#define DMISCI_STS (1 << 9) +#define TCO2_STS 0x66 +#define TCO1_CNT 0x68 +#define TCO_LOCK (1 << 12) +#define TCO2_CNT 0x6a + +u16 get_pmbase(void); + +u16 reset_pm1_status(void); +void dump_pm1_status(u16 pm1_sts); +void dump_tco_status(u32 tco_sts); +u32 reset_tco_status(void); +void dump_gpe0_status(u64 gpe0_sts); +u64 reset_gpe0_status(void); +void dump_smi_status(u32 smi_sts); +u32 reset_smi_status(void); +void gpe0_mask(u32 clr, u32 set); +void alt_gpi_mask(u16 clr, u16 set); +void smi_set_eos(void); +void dump_alt_gp_smi_status(u16 alt_gp_smi_sts); +u16 reset_alt_gp_smi_status(void); +void southbridge_smm_xhci_sleep(u8 slp_type); +void gpi_route_interrupt(u8 gpi, u8 mode); +void southbridge_gate_memory_reset(void); +void southbridge_update_gnvs(u8 apm_cnt, int *smm_done); +void southbridge_finalize_all(void); +void southbridge_smi_monitor(void); +em64t101_smm_state_save_area_t *smi_apmc_find_state_save(u8 cmd); + +#endif /*INTEL_COMMON_PMUTIL_H */ diff --git a/src/southbridge/intel/common/smi.c b/src/southbridge/intel/common/smi.c new file mode 100644 index 0000000000..deaecb2625 --- /dev/null +++ b/src/southbridge/intel/common/smi.c @@ -0,0 +1,161 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * + * 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. + */ + + +#include <device/device.h> +#include <device/pci.h> +#include <console/console.h> +#include <arch/io.h> +#include <cpu/cpu.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/smm.h> +#include <cpu/intel/smm/gen1/smi.h> + +#include "pmutil.h" + +#define DEBUG_PERIODIC_SMIS 0 + +static u16 pmbase; + +u16 get_pmbase(void) +{ + return pmbase; +} + +void southbridge_smm_init(void) +{ + u32 smi_en; + u16 pm1_en; + u32 gpe0_en; + +#if IS_ENABLED(CONFIG_ELOG) + /* Log events from chipset before clearing */ + pch_log_state(); +#endif + + printk(BIOS_DEBUG, "Initializing southbridge SMI..."); + + pmbase = pci_read_config32(dev_find_slot(0, PCI_DEVFN(0x1f, 0)), + D31F0_PMBASE) & 0xff80; + + printk(BIOS_SPEW, " ... pmbase = 0x%04x\n", pmbase); + + smi_en = inl(pmbase + SMI_EN); + if (smi_en & APMC_EN) { + printk(BIOS_INFO, "SMI# handler already enabled?\n"); + return; + } + + printk(BIOS_DEBUG, "\n"); + dump_smi_status(reset_smi_status()); + dump_pm1_status(reset_pm1_status()); + dump_gpe0_status(reset_gpe0_status()); + dump_alt_gp_smi_status(reset_alt_gp_smi_status()); + dump_tco_status(reset_tco_status()); + + /* Disable GPE0 PME_B0 */ + gpe0_en = inl(pmbase + GPE0_EN); + gpe0_en &= ~PME_B0_EN; + outl(gpe0_en, pmbase + GPE0_EN); + + pm1_en = 0; + pm1_en |= PWRBTN_EN; + pm1_en |= GBL_EN; + outw(pm1_en, pmbase + PM1_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) + */ + + smi_en = 0; /* reset SMI enables */ + +#if 0 + smi_en |= LEGACY_USB2_EN | LEGACY_USB_EN; +#endif + smi_en |= TCO_EN; + smi_en |= APMC_EN; +#if DEBUG_PERIODIC_SMIS + /* Set DEBUG_PERIODIC_SMIS in pch.h to debug using + * periodic SMIs. + */ + smi_en |= PERIODIC_EN; +#endif + smi_en |= SLP_SMI_EN; +#if 0 + smi_en |= BIOS_EN; +#endif + + /* The following need to be on for SMIs to happen */ + smi_en |= EOS | GBL_SMI_EN; + + outl(smi_en, pmbase + SMI_EN); +} + +void southbridge_trigger_smi(void) +{ + /** + * There are several methods of raising a controlled SMI# via + * software, among them: + * - Writes to io 0xb2 (APMC) + * - Writes to the Local Apic ICR with Delivery mode SMI. + * + * Using the local apic is a bit more tricky. According to + * AMD Family 11 Processor BKDG no destination shorthand must be + * used. + * The whole SMM initialization is quite a bit hardware specific, so + * I'm not too worried about the better of the methods at the moment + */ + + /* raise an SMI interrupt */ + printk(BIOS_SPEW, " ... raise SMI#\n"); + outb(0x00, 0xb2); +} + +void southbridge_clear_smi_status(void) +{ + /* Clear SMI status */ + reset_smi_status(); + + /* Clear PM1 status */ + reset_pm1_status(); + + /* Set EOS bit so other SMIs can occur. */ + smi_set_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" ((u32)gnvs), + "d" (APM_CNT) + ); +} diff --git a/src/southbridge/intel/common/smihandler.c b/src/southbridge/intel/common/smihandler.c new file mode 100644 index 0000000000..0e372d69da --- /dev/null +++ b/src/southbridge/intel/common/smihandler.c @@ -0,0 +1,527 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 coresystems GmbH + * + * 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. + */ + +#include <types.h> +#include <arch/io.h> +#include <arch/acpi.h> +#include <console/console.h> +#include <cpu/x86/cache.h> +#include <device/pci_def.h> +#include <cpu/x86/smm.h> +#include <elog.h> +#include <halt.h> +#include <pc80/mc146818rtc.h> +#include "pmutil.h" + +static int smm_initialized = 0; + +static u16 pmbase; + +u16 get_pmbase(void) +{ + return pmbase; +} + +/* Defined in <cpu/x86/smm.h> which is used outside of common code*/ +u16 smm_get_pmbase(void) +{ + return get_pmbase(); +} + +void gpi_route_interrupt(u8 gpi, u8 mode) +{ + u32 gpi_rout; + if (gpi >= 16) + return; + + alt_gpi_mask(1 << gpi, 0); + gpe0_mask(1 << (gpi+16), 0); + + gpi_rout = pci_read_config32(PCI_DEV(0, 0x1f, 0), D31F0_GPIO_ROUT); + gpi_rout &= ~(3 << (2 * gpi)); + gpi_rout |= ((mode & 3) << (2 * gpi)); + pci_write_config32(PCI_DEV(0, 0x1f, 0), D31F0_GPIO_ROUT, gpi_rout); + + if (mode == GPI_IS_SCI) + gpe0_mask(0, 1 << (gpi+16)); + else if (mode == GPI_IS_SMI) + alt_gpi_mask(0, 1 << gpi); +} + +/** + * @brief Set the EOS bit + */ +void southbridge_smi_set_eos(void) +{ + u8 reg8; + + reg8 = inb(pmbase + SMI_EN); + reg8 |= EOS; + outb(reg8, pmbase + SMI_EN); +} + +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; + pci_devfn_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); + } + } + } +} + +__attribute__((weak)) void southbridge_gate_memory_reset(void) +{ +} + +__attribute__((weak)) void southbridge_smm_xhci_sleep(u8 slp_type) +{ +} + + +static void southbridge_smi_sleep(void) +{ + u8 reg8; + u32 reg32; + u8 slp_typ; + u8 s5pwr = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL; + + // save and recover RTC port values + u8 tmp70, tmp72; + tmp70 = inb(0x70); + tmp72 = inb(0x72); + get_option(&s5pwr, "power_on_after_fail"); + outb(tmp70, 0x70); + outb(tmp72, 0x72); + + /* First, disable further SMIs */ + reg8 = inb(pmbase + SMI_EN); + reg8 &= ~SLP_SMI_EN; + outb(reg8, pmbase + SMI_EN); + + /* Figure out SLP_TYP */ + reg32 = inl(pmbase + PM1_CNT); + printk(BIOS_SPEW, "SMI#: SLP = 0x%08x\n", reg32); + slp_typ = acpi_sleep_from_pm1(reg32); + + southbridge_smm_xhci_sleep(slp_typ); + + /* Do any mainboard sleep handling */ + mainboard_smi_sleep(slp_typ); + +#if IS_ENABLED(CONFIG_ELOG_GSMI) + /* Log S3, S4, and S5 entry */ + if (slp_typ >= ACPI_S3) + elog_add_event_byte(ELOG_TYPE_ACPI_ENTER, slp_typ); +#endif + + /* Next, do the deed. + */ + + switch (slp_typ) { + case ACPI_S0: + printk(BIOS_DEBUG, "SMI#: Entering S0 (On)\n"); + break; + case ACPI_S1: + printk(BIOS_DEBUG, "SMI#: Entering S1 (Assert STPCLK#)\n"); + break; + case ACPI_S3: + printk(BIOS_DEBUG, "SMI#: Entering S3 (Suspend-To-RAM)\n"); + + /* Gate memory reset */ + southbridge_gate_memory_reset(); + + /* Invalidate the cache before going to S3 */ + wbinvd(); + break; + case ACPI_S4: + printk(BIOS_DEBUG, "SMI#: Entering S4 (Suspend-To-Disk)\n"); + break; + case ACPI_S5: + printk(BIOS_DEBUG, "SMI#: Entering S5 (Soft Power off)\n"); + + outl(0, pmbase + GPE0_EN); + + /* Always set the flag in case CMOS was changed on runtime. For + * "KEEP", switch to "OFF" - KEEP is software emulated + */ + reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), D31F0_GEN_PMCON_3); + if (s5pwr == MAINBOARD_POWER_ON) { + reg8 &= ~1; + } else { + reg8 |= 1; + } + pci_write_config8(PCI_DEV(0, 0x1f, 0), D31F0_GEN_PMCON_3, reg8); + + /* 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. + */ + outl(reg32 | SLP_EN, pmbase + PM1_CNT); + + /* Make sure to stop executing code here for S3/S4/S5 */ + if (slp_typ >= ACPI_S3) + halt(); + + /* 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 */ + reg32 &= ~(SLP_EN | SLP_TYP); + outl(reg32, pmbase + PM1_CNT); + } +} + +/* + * 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. + */ +em64t101_smm_state_save_area_t *smi_apmc_find_state_save(u8 cmd) +{ + em64t101_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 IS_ENABLED(CONFIG_ELOG_GSMI) +static void southbridge_smi_gsmi(void) +{ + u32 *ret, *param; + u8 sub_command; + em64t101_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 = (u8)(*ret >> 8); + + /* Parameter buffer in EBX */ + param = (u32*)&io_smi->rbx; + + /* drivers/elog/gsmi.c */ + *ret = gsmi_exec(sub_command, param); +} +#endif + +static int mainboard_finalized = 0; + +static void southbridge_smi_apmc(void) +{ + u32 pmctrl; + u8 reg8; + + /* 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: + pmctrl = inl(pmbase + PM1_CNT); + pmctrl &= ~SCI_EN; + outl(pmctrl, pmbase + PM1_CNT); + printk(BIOS_DEBUG, "SMI#: ACPI disabled.\n"); + break; + case APM_CNT_ACPI_ENABLE: + pmctrl = inl(pmbase + PM1_CNT); + pmctrl |= SCI_EN; + outl(pmctrl, pmbase + PM1_CNT); + 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; + } + southbridge_update_gnvs(reg8, &smm_initialized); + break; + case APM_CNT_FINALIZE: + if (mainboard_finalized) { + printk(BIOS_DEBUG, "SMI#: Already finalized\n"); + return; + } + + southbridge_finalize_all(); + mainboard_finalized = 1; + break; +#if IS_ENABLED(CONFIG_ELOG_GSMI) + case ELOG_GSMI_APM_CNT: + southbridge_smi_gsmi(); + break; +#endif + } + + mainboard_smi_apmc(reg8); +} + +static void southbridge_smi_pm1(void) +{ + u16 pm1_sts; + + pm1_sts = reset_pm1_status(); + dump_pm1_status(pm1_sts); + + /* While OSPM is not active, poweroff immediately + * on a power button event. + */ + if (pm1_sts & PWRBTN_STS) { + // power button pressed + u32 reg32; + reg32 = (7 << 10) | (1 << 13); +#if IS_ENABLED(CONFIG_ELOG_GSMI) + elog_add_event(ELOG_TYPE_POWER_BUTTON); +#endif + outl(reg32, pmbase + PM1_CNT); + } +} + +static void southbridge_smi_gpe0(void) +{ + u32 gpe0_sts; + + gpe0_sts = reset_gpe0_status(); + dump_gpe0_status(gpe0_sts); +} + +static void southbridge_smi_gpi(void) +{ + u16 reg16; + reg16 = inw(pmbase + ALT_GP_SMI_STS); + outw(reg16, pmbase + ALT_GP_SMI_STS); + + reg16 &= inw(pmbase + ALT_GP_SMI_EN); + + mainboard_smi_gpi(reg16); + + if (reg16) + printk(BIOS_DEBUG, "GPI (mask %04x)\n", reg16); + + outw(reg16, pmbase + ALT_GP_SMI_STS); +} + +static void southbridge_smi_mc(void) +{ + u32 reg32; + + reg32 = inl(pmbase + SMI_EN); + + /* Are periodic SMIs enabled? */ + if ((reg32 & MCSMI_EN) == 0) + return; + + printk(BIOS_DEBUG, "Microcontroller SMI.\n"); +} + + + +static void southbridge_smi_tco(void) +{ + u32 tco_sts; + + tco_sts = reset_tco_status(); + + /* Any TCO event? */ + if (!tco_sts) + return; + + if (tco_sts & (1 << 8)) { // BIOSWR + u8 bios_cntl; + + bios_cntl = pci_read_config16(PCI_DEV(0, 0x1f, 0), 0xdc); + + if (bios_cntl & 1) { + /* BWE is RW, so the SMI was caused by a + * write to BWE, not by a write to the BIOS + */ + + /* This is the place where we notice someone + * is trying to tinker with the BIOS. We are + * trying to be nice and just ignore it. A more + * resolute answer would be to power down the + * box. + */ + printk(BIOS_DEBUG, "Switching back to RO\n"); + pci_write_config32(PCI_DEV(0, 0x1f, 0), 0xdc, + (bios_cntl & ~1)); + } /* No else for now? */ + } else if (tco_sts & (1 << 3)) { /* TIMEOUT */ + /* Handle TCO timeout */ + printk(BIOS_DEBUG, "TCO Timeout.\n"); + } else if (!tco_sts) { + dump_tco_status(tco_sts); + } +} + +static void southbridge_smi_periodic(void) +{ + u32 reg32; + + reg32 = inl(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 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 + southbridge_smi_gpi, // [10] GPI_STS + southbridge_smi_mc, // [11] MCSMI_STS + NULL, // [12] DEVMON_STS + 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 + southbridge_smi_monitor, // [21] MONITOR_STS + NULL, // [22] reserved + NULL, // [23] reserved + NULL, // [24] reserved + NULL, // [25] EL_SMI_STS + NULL, // [26] SPI_STS + NULL, // [27] reserved + NULL, // [28] reserved + NULL, // [29] reserved + NULL, // [30] reserved + NULL // [31] reserved +}; + +/** + * @brief Interrupt handler for SMI# + * @param node + * @param state_save + */ +void southbridge_smi_handler(void) +{ + int i, dump = 0; + u32 smi_sts; + + /* Update global variable pmbase */ + pmbase = pci_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc; + + /* We need to clear the SMI status registers, or we won't see what's + * happening in the following calls. + */ + smi_sts = reset_smi_status(); + + /* Call SMI sub handler for each of the status bits */ + for (i = 0; i < 31; i++) { + if (smi_sts & (1 << i)) { + if (southbridge_smi[i]) { + southbridge_smi[i](); + } else { + printk(BIOS_DEBUG, "SMI_STS[%d] occurred," + " but no handler available.\n", i); + dump = 1; + } + } + } + + if (dump) { + dump_smi_status(smi_sts); + } +} |