| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <assert.h> |
| #include <commonlib/sort.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <intelblocks/cfg.h> |
| #include <intelblocks/cpulib.h> |
| #include <intelpch/lockdown.h> |
| #include <soc/chip_common.h> |
| #include <soc/pci_devs.h> |
| #include <soc/msr.h> |
| #include <soc/soc_util.h> |
| #include <soc/util.h> |
| #include <timer.h> |
| |
| /* Only call this code from socket0! */ |
| void unlock_pam_regions(void) |
| { |
| uint32_t pam0123_unlock_dram = 0x33333330; |
| uint32_t pam456_unlock_dram = 0x00333333; |
| /* Get UBOX(1) for socket0 */ |
| uint32_t bus1 = socket0_get_ubox_busno(PCU_IIO_STACK); |
| |
| /* Assume socket0 owns PCI segment 0 */ |
| pci_io_write_config32(PCI_DEV(bus1, SAD_ALL_DEV, SAD_ALL_FUNC), |
| SAD_ALL_PAM0123_CSR, pam0123_unlock_dram); |
| pci_io_write_config32(PCI_DEV(bus1, SAD_ALL_DEV, SAD_ALL_FUNC), |
| SAD_ALL_PAM456_CSR, pam456_unlock_dram); |
| |
| uint32_t reg1 = pci_io_read_config32(PCI_DEV(bus1, SAD_ALL_DEV, |
| SAD_ALL_FUNC), SAD_ALL_PAM0123_CSR); |
| uint32_t reg2 = pci_io_read_config32(PCI_DEV(bus1, SAD_ALL_DEV, |
| SAD_ALL_FUNC), SAD_ALL_PAM456_CSR); |
| printk(BIOS_DEBUG, "%s:%s pam0123_csr: 0x%x, pam456_csr: 0x%x\n", |
| __FILE__, __func__, reg1, reg2); |
| } |
| |
| msr_t read_msr_ppin(void) |
| { |
| msr_t ppin = {0}; |
| msr_t msr; |
| |
| /* If MSR_PLATFORM_INFO PPIN_CAP is 0, PPIN capability is not supported */ |
| msr = rdmsr(MSR_PLATFORM_INFO); |
| if ((msr.lo & MSR_PPIN_CAP) == 0) { |
| printk(BIOS_ERR, "MSR_PPIN_CAP is 0, PPIN is not supported\n"); |
| return ppin; |
| } |
| |
| /* Access to MSR_PPIN is permitted only if MSR_PPIN_CTL LOCK is 0 and ENABLE is 1 */ |
| msr = rdmsr(MSR_PPIN_CTL); |
| if (msr.lo & MSR_PPIN_CTL_LOCK) { |
| printk(BIOS_ERR, "MSR_PPIN_CTL_LOCK is 1, PPIN access is not allowed\n"); |
| return ppin; |
| } |
| |
| if ((msr.lo & MSR_PPIN_CTL_ENABLE) == 0) { |
| /* Set MSR_PPIN_CTL ENABLE to 1 */ |
| msr.lo |= MSR_PPIN_CTL_ENABLE; |
| wrmsr(MSR_PPIN_CTL, msr); |
| } |
| ppin = rdmsr(MSR_PPIN); |
| return ppin; |
| } |
| |
| static unsigned int get_threads_per_package(void) |
| { |
| unsigned int core_count, thread_count; |
| cpu_read_topology(&core_count, &thread_count); |
| return thread_count; |
| } |
| |
| int get_platform_thread_count(void) |
| { |
| return soc_get_num_cpus() * get_threads_per_package(); |
| } |
| |
| const IIO_UDS *get_iio_uds(void) |
| { |
| size_t hob_size; |
| static const IIO_UDS *hob; |
| const uint8_t fsp_hob_iio_universal_data_guid[16] = FSP_HOB_IIO_UNIVERSAL_DATA_GUID; |
| |
| if (hob) |
| return hob; |
| |
| hob = fsp_find_extension_hob_by_guid(fsp_hob_iio_universal_data_guid, &hob_size); |
| assert(hob && hob_size != 0); |
| return hob; |
| } |
| |
| /* |
| * Returns true if the CPU in the specified socket was found |
| * during QPI init, false otherwise. |
| */ |
| bool soc_cpu_is_enabled(const size_t idx) |
| { |
| const IIO_UDS *hob = get_iio_uds(); |
| assert(idx < CONFIG_MAX_SOCKET); |
| |
| return hob->PlatformData.IIO_resource[idx].Valid; |
| } |
| |
| unsigned int soc_get_num_cpus(void) |
| { |
| return get_iio_uds()->SystemStatus.numCpus; |
| } |
| |
| #if ENV_RAMSTAGE /* Setting devtree variables is only allowed in ramstage. */ |
| |
| void lock_pam0123(void) |
| { |
| const uint32_t pam0123_lock = 0x33333331; |
| struct device *dev; |
| |
| if (get_lockdown_config() != CHIPSET_LOCKDOWN_COREBOOT) |
| return; |
| |
| dev = NULL; |
| /* Look for SAD_ALL devices on all sockets */ |
| while ((dev = dev_find_device(PCI_VID_INTEL, SAD_ALL_DEVID, dev))) |
| pci_write_config32(dev, SAD_ALL_PAM0123_CSR, pam0123_lock); |
| } |
| |
| /* return true if command timed out else false */ |
| static bool wait_for_bios_cmd_cpl(struct device *pcu1, uint32_t reg, uint32_t mask, |
| uint32_t target) |
| { |
| const uint32_t max_delay = 5000; /* 5 seconds max */ |
| const uint32_t step_delay = 50; /* 50 us */ |
| struct stopwatch sw; |
| |
| stopwatch_init_msecs_expire(&sw, max_delay); |
| while ((pci_read_config32(pcu1, reg) & mask) != target) { |
| udelay(step_delay); |
| if (stopwatch_expired(&sw)) { |
| printk(BIOS_ERR, "%s timed out for dev: %s, reg: 0x%x, " |
| "mask: 0x%x, target: 0x%x\n", |
| __func__, dev_path(pcu1), reg, mask, target); |
| return true; /* timedout */ |
| } |
| } |
| return false; /* successful */ |
| } |
| |
| /* return true if command timed out else false */ |
| static bool write_bios_mailbox_cmd(struct device *pcu1, uint32_t command, uint32_t data) |
| { |
| /* verify bios is not in busy state */ |
| if (wait_for_bios_cmd_cpl(pcu1, PCU_CR1_BIOS_MB_INTERFACE_REG, BIOS_MB_RUN_BUSY_MASK, 0)) |
| return true; /* timed out */ |
| |
| /* write data to data register */ |
| printk(BIOS_SPEW, "%s - pci_write_config32 reg: 0x%x, data: 0x%x\n", __func__, |
| PCU_CR1_BIOS_MB_DATA_REG, data); |
| |
| pci_write_config32(pcu1, PCU_CR1_BIOS_MB_DATA_REG, data); |
| |
| /* write the command */ |
| printk(BIOS_SPEW, "%s - pci_write_config32 reg: 0x%x, data: 0x%lx\n", __func__, |
| PCU_CR1_BIOS_MB_INTERFACE_REG, command | BIOS_MB_RUN_BUSY_MASK); |
| |
| pci_write_config32(pcu1, PCU_CR1_BIOS_MB_INTERFACE_REG, |
| command | BIOS_MB_RUN_BUSY_MASK); |
| |
| /* wait for completion or time out*/ |
| return wait_for_bios_cmd_cpl(pcu1, PCU_CR1_BIOS_MB_INTERFACE_REG, |
| BIOS_MB_RUN_BUSY_MASK, 0); |
| } |
| |
| /* return true if command timed out else false */ |
| static bool set_bios_reset_cpl_for_package(struct device *pcu1, |
| uint32_t rst_cpl_mask, |
| uint32_t pcode_init_mask, |
| uint32_t val) |
| { |
| /* update BIOS RESET completion bit */ |
| pci_update_config32(pcu1, PCU_CR1_BIOS_RESET_CPL_REG, ~rst_cpl_mask, val); |
| |
| /* wait for PCU ack */ |
| return wait_for_bios_cmd_cpl(pcu1, PCU_CR1_BIOS_RESET_CPL_REG, |
| pcode_init_mask, pcode_init_mask); |
| } |
| |
| static void set_bios_init_completion_for_package(uint32_t socket) |
| { |
| struct device *pcu0 = dev_find_device_on_socket(socket, PCI_VID_INTEL, PCU_CR0_DEVID); |
| struct device *pcu1 = dev_find_device_on_socket(socket, PCI_VID_INTEL, PCU_CR1_DEVID); |
| uint32_t data; |
| bool timedout; |
| |
| if (!pcu0 || !pcu1) |
| die("Failed to locate PCU PCI device\n"); |
| |
| /* read PCU config */ |
| timedout = write_bios_mailbox_cmd(pcu1, BIOS_CMD_READ_PCU_MISC_CFG, 0); |
| if (timedout) { |
| /* 2nd try */ |
| timedout = write_bios_mailbox_cmd(pcu1, BIOS_CMD_READ_PCU_MISC_CFG, 0); |
| if (timedout) |
| die("BIOS PCU Misc Config Read timed out.\n"); |
| |
| /* Since the 1st try failed, we need to make sure PCU is in stable state */ |
| data = pci_read_config32(pcu1, PCU_CR1_BIOS_MB_DATA_REG); |
| printk(BIOS_SPEW, "%s - pci_read_config32 reg: 0x%x, data: 0x%x\n", |
| __func__, PCU_CR1_BIOS_MB_DATA_REG, data); |
| timedout = write_bios_mailbox_cmd(pcu1, BIOS_CMD_WRITE_PCU_MISC_CFG, data); |
| if (timedout) |
| die("BIOS PCU Misc Config Write timed out.\n"); |
| } |
| |
| /* update RST_CPL3, PCODE_INIT_DONE3 */ |
| timedout = set_bios_reset_cpl_for_package(pcu1, RST_CPL3_MASK, |
| PCODE_INIT_DONE3_MASK, RST_CPL3_MASK); |
| if (timedout) |
| die("BIOS RESET CPL3 timed out.\n"); |
| |
| /* Set PMAX_LOCK - must be set before RESET CPL4 */ |
| data = pci_read_config32(pcu0, PCU_CR0_PMAX); |
| data |= PMAX_LOCK; |
| pci_write_config32(pcu0, PCU_CR0_PMAX, data); |
| |
| /* update RST_CPL4, PCODE_INIT_DONE4 */ |
| timedout = set_bios_reset_cpl_for_package(pcu1, RST_CPL4_MASK, |
| PCODE_INIT_DONE4_MASK, RST_CPL4_MASK); |
| if (timedout) |
| die("BIOS RESET CPL4 timed out.\n"); |
| |
| /* set CSR_DESIRED_CORES_CFG2 lock bit */ |
| data = pci_read_config32(pcu1, PCU_CR1_DESIRED_CORES_CFG2_REG); |
| data |= PCU_CR1_DESIRED_CORES_CFG2_REG_LOCK_MASK; |
| printk(BIOS_SPEW, "%s - pci_write_config32 PCU_CR1_DESIRED_CORES_CFG2_REG 0x%x, data: 0x%x\n", |
| __func__, PCU_CR1_DESIRED_CORES_CFG2_REG, data); |
| pci_write_config32(pcu1, PCU_CR1_DESIRED_CORES_CFG2_REG, data); |
| } |
| |
| void set_bios_init_completion(void) |
| { |
| uint32_t sbsp_socket_id = 0; |
| |
| /* |
| * According to the BIOS Writer's Guide, the SBSP must be the last socket |
| * to receive the BIOS init completion message. So, we send it to all non-SBSP |
| * sockets first. |
| */ |
| for (uint32_t socket = 0; socket < CONFIG_MAX_SOCKET; ++socket) { |
| if (!soc_cpu_is_enabled(socket)) |
| continue; |
| if (socket == sbsp_socket_id) |
| continue; |
| set_bios_init_completion_for_package(socket); |
| } |
| |
| /* And finally, take care of the SBSP */ |
| set_bios_init_completion_for_package(sbsp_socket_id); |
| } |
| #endif |