From 322b1c3d90200db2428554a9e1accfa07289930d Mon Sep 17 00:00:00 2001 From: Angel Pons Date: Fri, 6 May 2022 22:18:21 +0200 Subject: haswell/lynxpoint: Add native early ME init Implement native early ME init for Lynx Point. This is only needed when MRC.bin is not used. Change-Id: If416e2078f139f26b4742c564b70e018725bf003 Signed-off-by: Angel Pons Reviewed-on: https://review.coreboot.org/c/coreboot/+/64178 Tested-by: build bot (Jenkins) Reviewed-by: Arthur Heymans --- src/southbridge/intel/lynxpoint/early_me.c | 30 +++++++++++++++++++++++++++++- src/southbridge/intel/lynxpoint/me.h | 7 +++++-- 2 files changed, 34 insertions(+), 3 deletions(-) (limited to 'src/southbridge/intel') diff --git a/src/southbridge/intel/lynxpoint/early_me.c b/src/southbridge/intel/lynxpoint/early_me.c index 947c570e16..07013c5539 100644 --- a/src/southbridge/intel/lynxpoint/early_me.c +++ b/src/southbridge/intel/lynxpoint/early_me.c @@ -1,11 +1,12 @@ /* SPDX-License-Identifier: GPL-2.0-only */ #include +#include #include #include #include #include - +#include #include "me.h" #include "pch.h" @@ -60,6 +61,33 @@ int intel_early_me_init(void) return 0; } +bool intel_early_me_cpu_replacement_check(void) +{ + printk(BIOS_DEBUG, "ME: Checking whether CPU was replaced... "); + + struct stopwatch timer; + stopwatch_init_msecs_expire(&timer, 50); + + union me_hfs2 hfs2; + do { + hfs2.raw = pci_read_config32(PCH_ME_DEV, PCI_ME_HFS2); + if (stopwatch_expired(&timer)) { + /* Assume CPU was replaced just in case */ + printk(BIOS_DEBUG, "timed out, assuming CPU was replaced\n"); + return true; + } + udelay(ME_DELAY); + } while (!hfs2.cpu_replaced_valid); + + if (hfs2.warm_reset_request) { + printk(BIOS_DEBUG, "warm reset needed for dynamic fusing\n"); + system_reset(); + } + + printk(BIOS_DEBUG, "%sreplaced\n", hfs2.cpu_replaced_sts ? "" : "not "); + return hfs2.cpu_replaced_sts; +} + int intel_early_me_uma_size(void) { union me_uma uma = { .raw = pci_read_config32(PCH_ME_DEV, PCI_ME_UMA) }; diff --git a/src/southbridge/intel/lynxpoint/me.h b/src/southbridge/intel/lynxpoint/me.h index fe8b0260c4..6990322651 100644 --- a/src/southbridge/intel/lynxpoint/me.h +++ b/src/southbridge/intel/lynxpoint/me.h @@ -177,14 +177,16 @@ union me_did { union me_hfs2 { struct __packed { u32 bist_in_progress: 1; - u32 reserved1: 2; + u32 icc_prog_sts: 2; u32 invoke_mebx: 1; u32 cpu_replaced_sts: 1; u32 mbp_rdy: 1; u32 mfs_failure: 1; u32 warm_reset_request: 1; u32 cpu_replaced_valid: 1; - u32 reserved2: 4; + u32 reserved: 2; + u32 fw_upd_ipu: 1; + u32 reserved2: 1; u32 mbp_cleared: 1; u32 reserved3: 2; u32 current_state: 8; @@ -338,6 +340,7 @@ void intel_me_status(union me_hfs hfs, union me_hfs2 hfs2); void intel_early_me_status(void); int intel_early_me_init(void); +bool intel_early_me_cpu_replacement_check(void); int intel_early_me_uma_size(void); int intel_early_me_init_done(u8 status); -- cgit v1.2.3