diff options
author | Marc Jones <marcjones@sysproconsulting.com> | 2020-11-02 15:30:10 -0700 |
---|---|---|
committer | Patrick Georgi <pgeorgi@google.com> | 2020-11-09 10:17:14 +0000 |
commit | 5851f9dae5e94cfae9e027da8302f80c65e5b647 (patch) | |
tree | 43ab51694390983112d67b4e4b93e084e57f04fe /src/soc/intel/xeon_sp/util.c | |
parent | 12d515dcc56230cba10884d425d8e07ed4562e0c (diff) |
soc/intel/xeon_sp: Move set_bios_init_completion()
Move set_bios_init_completion() and helper functions from skx
and cpx soc_util.c to xeon common util.c. There are some slight
differences between skx and cpx, so used the more correct cpx
functions. Both cpx and skx platforms boot as expected.
Change-Id: Ie416b3a43ccdd14a0eb542786593c2eb4d37450f
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47172
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Jay Talbott <JayTalbott@sysproconsulting.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/xeon_sp/util.c')
-rw-r--r-- | src/soc/intel/xeon_sp/util.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/soc/intel/xeon_sp/util.c b/src/soc/intel/xeon_sp/util.c index 75f8a8a10a..310421566c 100644 --- a/src/soc/intel/xeon_sp/util.c +++ b/src/soc/intel/xeon_sp/util.c @@ -3,12 +3,15 @@ #include <assert.h> #include <commonlib/sort.h> #include <console/console.h> +#include <delay.h> #include <device/device.h> #include <device/pci.h> #include <intelblocks/cpulib.h> #include <soc/pci_devs.h> #include <soc/msr.h> +#include <soc/soc_util.h> #include <soc/util.h> +#include <timer.h> void get_stack_busnos(uint32_t *bus) { @@ -224,4 +227,130 @@ void xeonsp_init_cpu_config(void) ++num_apics; } } + +/* return true if command timed out else false */ +static bool wait_for_bios_cmd_cpl(pci_devfn_t dev, 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_s_read_config32(dev, reg) & mask) != target) { + udelay(step_delay); + if (stopwatch_expired(&sw)) { + printk(BIOS_ERR, "%s timed out for dev: %x, reg: 0x%x, " + "mask: 0x%x, target: 0x%x\n", __func__, dev, reg, mask, target); + return true; /* timedout */ + } + } + return false; /* successful */ +} + +/* return true if command timed out else false */ +static bool write_bios_mailbox_cmd(pci_devfn_t dev, uint32_t command, uint32_t data) +{ + /* verify bios is not in busy state */ + if (wait_for_bios_cmd_cpl(dev, 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_s_write_config32 reg: 0x%x, data: 0x%x\n", __func__, + PCU_CR1_BIOS_MB_DATA_REG, data); + pci_s_write_config32(dev, PCU_CR1_BIOS_MB_DATA_REG, data); + + /* write the command */ + printk(BIOS_SPEW, "%s - pci_s_write_config32 reg: 0x%x, data: 0x%lx\n", __func__, + PCU_CR1_BIOS_MB_INTERFACE_REG, command | BIOS_MB_RUN_BUSY_MASK); + pci_s_write_config32(dev, PCU_CR1_BIOS_MB_INTERFACE_REG, + command | BIOS_MB_RUN_BUSY_MASK); + + /* wait for completion or time out*/ + return wait_for_bios_cmd_cpl(dev, 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(uint32_t socket, uint32_t rst_cpl_mask, + uint32_t pcode_init_mask, uint32_t val) +{ + const uint32_t bus = get_socket_stack_busno(socket, PCU_IIO_STACK); + const pci_devfn_t dev = PCI_DEV(bus, PCU_DEV, PCU_CR1_FUN); + + uint32_t reg = pci_s_read_config32(dev, PCU_CR1_BIOS_RESET_CPL_REG); + reg &= (uint32_t) ~rst_cpl_mask; + reg |= val; + + /* update BIOS RESET completion bit */ + pci_s_write_config32(dev, PCU_CR1_BIOS_RESET_CPL_REG, reg); + + /* wait for PCU ack */ + return wait_for_bios_cmd_cpl(dev, PCU_CR1_BIOS_RESET_CPL_REG, pcode_init_mask, + pcode_init_mask); +} + +static void set_bios_init_completion_for_package(uint32_t socket) +{ + uint32_t data; + bool timedout; + const uint32_t bus = get_socket_stack_busno(socket, PCU_IIO_STACK); + const pci_devfn_t dev = PCI_DEV(bus, PCU_DEV, PCU_CR1_FUN); + + /* read PCU config */ + timedout = write_bios_mailbox_cmd(dev, BIOS_CMD_READ_PCU_MISC_CFG, 0); + if (timedout) { + /* 2nd try */ + timedout = write_bios_mailbox_cmd(dev, 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_s_read_config32(dev, PCU_CR1_BIOS_MB_DATA_REG); + printk(BIOS_SPEW, "%s - pci_s_read_config32 reg: 0x%x, data: 0x%x\n", + __func__, PCU_CR1_BIOS_MB_DATA_REG, data); + timedout = write_bios_mailbox_cmd(dev, 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(socket, RST_CPL3_MASK, + PCODE_INIT_DONE3_MASK, RST_CPL3_MASK); + if (timedout) + die("BIOS RESET CPL3 timed out.\n"); + + /* update RST_CPL4, PCODE_INIT_DONE4 */ + timedout = set_bios_reset_cpl_for_package(socket, 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_s_read_config32(dev, PCU_CR1_DESIRED_CORES_CFG2_REG); + data |= PCU_CR1_DESIRED_CORES_CFG2_REG_LOCK_MASK; + printk(BIOS_SPEW, "%s - pci_s_write_config32 PCU_CR1_DESIRED_CORES_CFG2_REG 0x%x, data: 0x%x\n", + __func__, PCU_CR1_DESIRED_CORES_CFG2_REG, data); + pci_s_write_config32(dev, PCU_CR1_DESIRED_CORES_CFG2_REG, data); +} + +void set_bios_init_completion(void) +{ + /* FIXME: This may need to be changed for multi-socket platforms */ + 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 < soc_get_num_cpus(); ++socket) { + 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 |