soc/intel/cmn/block/cse: ME source code at common location

This patch adds ME specific source code at common location in order to
reduce maintenance efforts at SoC level and improve readability. The
functionality and code are redundant for various SoC platforms and
require more maintenance.

BUG=b:260309647
Test=Build verified for brya and rex.

Signed-off-by: Dinesh Gehlot <digehlot@google.com>
Change-Id: Ic6622662fd3b8bcc9d9ac8bd6ffa732f5d78801a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73133
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 120 insertions, 1 deletions

diff --git a/src/soc/intel/common/block/cse/Makefile.inc b/src/soc/intel/common/block/cse/Makefile.inc
index d5ea93397aaa..3e1127957d0d 100644
--- a/src/soc/intel/common/block/cse/Makefile.inc
+++ b/src/soc/intel/common/block/cse/Makefile.inc
@@ -3,9 +3,9 @@ romstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c
 ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += cse.c
 romstage-$(CONFIG_SOC_INTEL_CSE_LITE_SKU) += cse_lite.c
 ramstage-$(CONFIG_SOC_INTEL_CSE_LITE_SKU) += cse_lite.c
+ramstage-$(CONFIG_SOC_INTEL_CSE_HAVE_SPEC_SUPPORT) += cse_spec.c
 ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += disable_heci.c
 smm-$(CONFIG_SOC_INTEL_COMMON_BLOCK_CSE) += disable_heci.c
-
 ramstage-$(CONFIG_SOC_INTEL_CSE_SET_EOP) += cse_eop.c
 romstage-$(CONFIG_SOC_INTEL_CSE_PRE_CPU_RESET_TELEMETRY) += telemetry.c
 
diff --git a/src/soc/intel/common/block/cse/cse_spec.c b/src/soc/intel/common/block/cse/cse_spec.c
new file mode 100644
index 000000000000..74155cd15016
--- /dev/null
+++ b/src/soc/intel/common/block/cse/cse_spec.c
@@ -0,0 +1,119 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootstate.h>
+#include <intelblocks/cse.h>
+#include <intelblocks/me.h>
+#include <console/console.h>
+#include <stdint.h>
+
+/*
+ * This function returns state of manufacturing mode.
+ *
+ * ME manufacturing mode is disabled if the descriptor is locked and fuses
+ * are programmed. Additionally, if the SoC supports manufacturing variable, should be locked.
+ */
+static bool is_manufacturing_mode(union me_hfsts1 hfsts1, union me_hfsts6 hfsts6)
+{
+#if CONFIG_ME_SPEC <= 13
+	return !(hfsts1.fields.mfg_mode == 0);
+#elif CONFIG_ME_SPEC <= 15
+	return !((hfsts1.fields.mfg_mode == 0) &&
+		 (hfsts6.fields.fpf_soc_lock == 1));
+#else
+	return !((hfsts1.fields.mfg_mode == 0) &&
+		 (hfsts6.fields.fpf_soc_lock == 1) &&
+		 (hfsts6.fields.manuf_lock == 1));
+#endif
+}
+
+static void dump_me_status(void *unused)
+{
+	union me_hfsts1 hfsts1;
+	union me_hfsts2 hfsts2;
+	union me_hfsts3 hfsts3;
+	union me_hfsts4 hfsts4;
+	union me_hfsts5 hfsts5;
+	union me_hfsts6 hfsts6;
+	bool manufacturing_mode;
+
+	if (!is_cse_enabled())
+		return;
+
+	hfsts1.data = me_read_config32(PCI_ME_HFSTS1);
+	hfsts2.data = me_read_config32(PCI_ME_HFSTS2);
+	hfsts3.data = me_read_config32(PCI_ME_HFSTS3);
+	hfsts4.data = me_read_config32(PCI_ME_HFSTS4);
+	hfsts5.data = me_read_config32(PCI_ME_HFSTS5);
+	hfsts6.data = me_read_config32(PCI_ME_HFSTS6);
+
+	printk(BIOS_DEBUG, "ME: HFSTS1                      : 0x%08X\n", hfsts1.data);
+	printk(BIOS_DEBUG, "ME: HFSTS2                      : 0x%08X\n", hfsts2.data);
+	printk(BIOS_DEBUG, "ME: HFSTS3                      : 0x%08X\n", hfsts3.data);
+	printk(BIOS_DEBUG, "ME: HFSTS4                      : 0x%08X\n", hfsts4.data);
+	printk(BIOS_DEBUG, "ME: HFSTS5                      : 0x%08X\n", hfsts5.data);
+	printk(BIOS_DEBUG, "ME: HFSTS6                      : 0x%08X\n", hfsts6.data);
+
+	manufacturing_mode = is_manufacturing_mode(hfsts1, hfsts6);
+	printk(BIOS_DEBUG, "ME: Manufacturing Mode          : %s\n",
+	       manufacturing_mode ? "YES" : "NO");
+	/*
+	 * The SPI Protection Mode bit reflects SPI descriptor
+	 * locked(0) or unlocked(1).
+	 */
+	printk(BIOS_DEBUG, "ME: SPI Protection Mode Enabled : %s\n",
+		hfsts1.fields.mfg_mode ? "NO" : "YES");
+	printk(BIOS_DEBUG, "ME: FW Partition Table          : %s\n",
+		hfsts1.fields.fpt_bad ? "BAD" : "OK");
+	printk(BIOS_DEBUG, "ME: Bringup Loader Failure      : %s\n",
+		hfsts1.fields.ft_bup_ld_flr ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: Firmware Init Complete      : %s\n",
+		hfsts1.fields.fw_init_complete ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: Boot Options Present        : %s\n",
+		hfsts1.fields.boot_options_present ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: Update In Progress          : %s\n",
+		hfsts1.fields.update_in_progress ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: D0i3 Support                : %s\n",
+		hfsts1.fields.d0i3_support_valid ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: Low Power State Enabled     : %s\n",
+		hfsts2.fields.low_power_state ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: CPU Replaced                : %s\n",
+		hfsts2.fields.cpu_replaced  ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: CPU Replacement Valid       : %s\n",
+		hfsts2.fields.cpu_replaced_valid ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: Current Working State       : %u\n",
+		hfsts1.fields.working_state);
+	printk(BIOS_DEBUG, "ME: Current Operation State     : %u\n",
+		hfsts1.fields.operation_state);
+	printk(BIOS_DEBUG, "ME: Current Operation Mode      : %u\n",
+		hfsts1.fields.operation_mode);
+	printk(BIOS_DEBUG, "ME: Error Code                  : %u\n",
+		hfsts1.fields.error_code);
+#if CONFIG_ME_SPEC >= 15
+	printk(BIOS_DEBUG, "ME: FPFs Committed              : %s\n",
+		hfsts6.fields.fpf_soc_lock ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: Enhanced Debug Mode         : %s\n",
+		hfsts1.fields.invoke_enhance_dbg_mode ? "YES" : "NO");
+#endif
+
+#if CONFIG_ME_SPEC <= 16
+	printk(BIOS_DEBUG, "ME: CPU Debug Disabled          : %s\n",
+		hfsts6.fields.cpu_debug_disable ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: TXT Support                 : %s\n",
+		hfsts6.fields.txt_support ? "YES" : "NO");
+#else
+	printk(BIOS_DEBUG, "ME: CPU Debug Disabled          : %s\n",
+		hfsts5.fields.cpu_debug_disabled ? "YES" : "NO");
+	printk(BIOS_DEBUG, "ME: TXT Support                 : %s\n",
+		hfsts5.fields.txt_support ? "YES" : "NO");
+#endif
+
+#if CONFIG_ME_SPEC >= 16
+	printk(BIOS_DEBUG, "ME: Manufacturing Vars Locked   : %s\n",
+		hfsts6.fields.manuf_lock ? "YES" : "NO");
+	if (CONFIG(SOC_INTEL_CSE_LITE_SKU))
+		cse_log_ro_write_protection_info(manufacturing_mode);
+#endif
+}
+
+BOOT_STATE_INIT_ENTRY(BS_DEV_ENABLE, BS_ON_EXIT, print_me_fw_version, NULL);
+BOOT_STATE_INIT_ENTRY(BS_OS_RESUME_CHECK, BS_ON_EXIT, dump_me_status, NULL);