From ac3e48257e36dce3d472bd04bdd10151e312671d Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Wed, 14 Jun 2017 13:21:00 -0500 Subject: soc/intel/apollolake: revert CPU MP init prior to FSP-S A major regression was introduced with commit 6520e01a (soc/intel/apollolake: Perform CPU MP Init before FSP-S Init) where the APs execution context is taken away by FSP-S. It appears that FSP-S is not honoring the SkipMpInit UPD because it's been shown with some debug code that FSP-S is compeltely hijacking the APs: Chrome EC: Set WAKE mask to 0x00000000 Chrome EC: Set WAKE mask to 0x00000000 CBFS: 'VBOOT' located CBFS at [440000:524140) CBFS: Locating 'vbt.bin' CBFS: Found @ offset 2e700 size 1a00 Running FSPS in 4 secs.. 315875 4315875 cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work cpu2 Waiting for work cpu3 Waiting for work cpu1 Waiting for work Running FSPS.. 4315875 4315875 ITSS IRQ Polarities Before: ITSS IRQ Polarities Before: IPC0: 0xffffeef8 IPC1: 0xffffffff IPC2: 0xffffffff IPC3: 0x00ffffff ITSS IRQ Polarities After: IPC0: 0xffffeef8 IPC1: 0x4a07ffff IPC2: 0x08000000 IPC3: 0x00a11000 This is essentially a revert of 6520e01a to fix the previous behavior. Change-Id: I2e136ea1757870fe69df532ba615b9bfc6dfc651 Signed-off-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/20215 Reviewed-by: Furquan Shaikh Tested-by: build bot (Jenkins) Reviewed-by: Andrey Petrov --- src/soc/intel/apollolake/cpu.c | 37 ++++++------------------------------- 1 file changed, 6 insertions(+), 31 deletions(-) (limited to 'src/soc/intel/apollolake/cpu.c') diff --git a/src/soc/intel/apollolake/cpu.c b/src/soc/intel/apollolake/cpu.c index ec202e4e29..43f9b8381f 100644 --- a/src/soc/intel/apollolake/cpu.c +++ b/src/soc/intel/apollolake/cpu.c @@ -16,8 +16,6 @@ * GNU General Public License for more details. */ -#include -#include #include #include #include @@ -27,12 +25,10 @@ #include #include #include -#include #include #include #include #include -#include #include #include #include @@ -109,17 +105,14 @@ static void read_cpu_topology(unsigned int *num_phys, unsigned int *num_virt) /* * Do essential initialization tasks before APs can be fired up - * - * Skip Pre MP init MTRR programming, as MTRRs are mirrored from BSP, - * that are set prior to ramstage. - * Real MTRRs programming are being done after resource allocation. - * - * Do, FSP loading before MP Init to ensure that the FSP cmponent stored in - * external stage cache in TSEG does not flush off due to SMM relocation - * during MP Init stage. + * 1. Prevent race condition in MTRR solution. Enable MTRRs on the BSP. This + * creates the MTRR solution that the APs will use. Otherwise APs will try to + * apply the incomplete solution as the BSP is calculating it. */ static void pre_mp_init(void) { - fsps_load(romstage_handoff_is_resume()); + x86_setup_mtrrs_with_detect(); + x86_mtrr_check(); } /* Find CPU topology */ @@ -201,32 +194,14 @@ static const struct mp_ops mp_ops = { .post_mp_init = southbridge_smm_enable_smi, }; -static void soc_init_cpus(void *unused) +void apollolake_init_cpus(struct device *dev) { - device_t dev = dev_find_path(NULL, DEVICE_PATH_CPU_CLUSTER); - assert(dev != NULL); - /* Clear for take-off */ if (mp_init_with_smm(dev->link_list, &mp_ops) < 0) printk(BIOS_ERR, "MP initialization failure.\n"); -} - -/* Ensure to re-program all MTRRs based on DRAM resource settings */ -static void soc_post_cpus_init(void *unused) -{ - if (mp_run_on_all_cpus(&x86_setup_mtrrs_with_detect, 1000) < 0) - printk(BIOS_ERR, "MTRR programming failure\n"); /* Temporarily cache the memory-mapped boot media. */ if (IS_ENABLED(CONFIG_BOOT_DEVICE_MEMORY_MAPPED) && IS_ENABLED(CONFIG_BOOT_DEVICE_SPI_FLASH)) fast_spi_cache_bios_region(); - - x86_mtrr_check(); } - -/* - * Do CPU MP Init before FSP Silicon Init - */ -BOOT_STATE_INIT_ENTRY(BS_DEV_INIT_CHIPS, BS_ON_ENTRY, soc_init_cpus, NULL); -BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_EXIT, soc_post_cpus_init, NULL); -- cgit v1.2.3