diff options
Diffstat (limited to 'src/soc/intel/fsp_baytrail/smihandler.c')
| -rw-r--r-- | src/soc/intel/fsp_baytrail/smihandler.c | 395 |
1 files changed, 0 insertions, 395 deletions
diff --git a/src/soc/intel/fsp_baytrail/smihandler.c b/src/soc/intel/fsp_baytrail/smihandler.c deleted file mode 100644 index 1a8fb4b6e6..0000000000 --- a/src/soc/intel/fsp_baytrail/smihandler.c +++ /dev/null @@ -1,395 +0,0 @@ -/* - * 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. - */ - -#include <stdint.h> -#include <stdlib.h> -#include <arch/io.h> -#include <device/pci_ops.h> -#include <console/console.h> -#include <cpu/x86/cache.h> -#include <cpu/x86/smm.h> -#include <cpu/intel/em64t100_save_state.h> -#include <device/pci_def.h> -#include <elog.h> -#include <halt.h> - -#include <soc/pci_devs.h> -#include <soc/pmc.h> -#include <soc/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; - 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); - } - } - } -} - -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 = acpi_sleep_from_pm1(reg32); - - /* Do any mainboard sleep handling */ - mainboard_smi_sleep(slp_typ); - - /* Log S3, S4, and S5 entry */ - if (slp_typ >= ACPI_S3) - elog_gsmi_add_event_byte(ELOG_TYPE_ACPI_ENTER, slp_typ); - - /* 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"); - - /* 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"); - - /* 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 >= 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 */ - 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; -} - -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(APM_CNT_ELOG_GSMI); - - 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); -} - -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; - case APM_CNT_ELOG_GSMI: - if (CONFIG(ELOG_GSMI)) - southbridge_smi_gsmi(); - break; - } - - 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 - elog_gsmi_add_event(ELOG_TYPE_POWER_BUTTON); - disable_pm1_control(-1UL); - enable_pm1_control(SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT)); - } -} - -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] occurred, but no " - "handler available.\n", i); - } - } - - /* The GPIO SMI events do not have a status bit in SMI_STS. Therefore, - * these events need to be cleared and checked unconditionally. */ - mainboard_smi_gpi(clear_alt_status()); -} |