soc/intel/skylake: Add C entry bootblock support

List of activity performing in this patch
- early PCH programming
- early SA programming
- early CPU programming
- mainborad early gpio programming for UART and SPI
- car setup
- move chipset programming from verstage to post console

BUG=chrome-os-partner:55357
BRANCH=none
TEST=Built and booted kunimitsu till POST code 0x34

Change-Id: If20ab869de62cd4439f3f014f9362ccbec38e143
Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com>
Signed-off-by: Naveen Krishna Chatradhi <naveenkrishna.ch@intel.com>
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/15785
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

12 files changed, 100 insertions, 117 deletions

diff --git a/src/soc/intel/skylake/Kconfig b/src/soc/intel/skylake/Kconfig
index 5f12f5bb4a..bbffd17f6d 100644
--- a/src/soc/intel/skylake/Kconfig
+++ b/src/soc/intel/skylake/Kconfig
@@ -13,6 +13,7 @@ config CPU_SPECIFIC_OPTIONS
 	select ARCH_ROMSTAGE_X86_32
 	select ARCH_VERSTAGE_X86_32
 	select ACPI_NHLT
+	select BOOTBLOCK_CONSOLE
 	select CACHE_MRC_SETTINGS
 	select CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM if RELOCATABLE_RAMSTAGE
 	select C_ENVIRONMENT_BOOTBLOCK
@@ -61,22 +62,10 @@ config CHROMEOS
 	select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
 	select VIRTUAL_DEV_SWITCH
 
-config BOOTBLOCK_CPU_INIT
-	string
-	default "soc/intel/skylake/bootblock/cpu.c"
-
-config BOOTBLOCK_NORTHBRIDGE_INIT
-	string
-	default "soc/intel/skylake/bootblock/systemagent.c"
-
 config BOOTBLOCK_RESETS
 	string
 	default "soc/intel/common/reset.c"
 
-config BOOTBLOCK_SOUTHBRIDGE_INIT
-	string
-	default "soc/intel/skylake/bootblock/pch.c"
-
 config CBFS_SIZE
 	hex
 	default 0x200000
diff --git a/src/soc/intel/skylake/Makefile.inc b/src/soc/intel/skylake/Makefile.inc
index 30ff7b79de..8ef8ebd09c 100644
--- a/src/soc/intel/skylake/Makefile.inc
+++ b/src/soc/intel/skylake/Makefile.inc
@@ -11,14 +11,18 @@ subdirs-y += ../../../cpu/x86/tsc
 
 bootblock-y += bootblock/bootblock.c
 bootblock-y += bootblock/cache_as_ram.S
+bootblock-y += bootblock/cpu.c
+bootblock-y += bootblock/pch.c
+bootblock-y += bootblock/systemagent.c
+bootblock-y += bootblock/uart.c
+bootblock-y += gpio.c
+bootblock-y += monotonic_timer.c
+bootblock-y += pch.c
+bootblock-y += pcr.c
+bootblock-y += pmutil.c
+bootblock-y += tsc_freq.c
+bootblock-$(CONFIG_UART_DEBUG) += uart_debug.c
 
-verstage-y += gpio.c
-verstage-y += memmap.c
-verstage-y += monotonic_timer.c
-verstage-y += pch.c
-verstage-y += pmutil.c
-verstage-y += pcr.c
-verstage-y += tsc_freq.c
 verstage-$(CONFIG_UART_DEBUG) += uart_debug.c
 
 romstage-y += flash_controller.c
diff --git a/src/soc/intel/skylake/bootblock/bootblock.c b/src/soc/intel/skylake/bootblock/bootblock.c
index c7ec937566..028bb7b314 100644
--- a/src/soc/intel/skylake/bootblock/bootblock.c
+++ b/src/soc/intel/skylake/bootblock/bootblock.c
@@ -14,9 +14,34 @@
  */
 
 #include <bootblock_common.h>
+#include <soc/bootblock.h>
+#include <soc/romstage.h>
 
 void asmlinkage bootblock_c_entry(uint64_t base_timestamp)
 {
 	/* Call lib/bootblock.c main */
 	bootblock_main_with_timestamp(base_timestamp);
-}
\ No newline at end of file
+}
+
+void bootblock_soc_early_init(void)
+{
+	bootblock_systemagent_early_init();
+	bootblock_pch_early_init();
+	bootblock_cpu_init();
+
+	if (IS_ENABLED(CONFIG_BOOTBLOCK_CONSOLE))
+		pch_uart_init();
+}
+
+/*
+ * Perform early chipset initialization before fsp memory init
+ * example: pirq->irq programming, enabling smbus, pmcbase, abase,
+ * 			get platform info, i2c programming
+ */
+void bootblock_soc_init(void)
+{
+	report_platform_info();
+	set_max_freq();
+	pch_early_init();
+	i2c_early_init();
+}
diff --git a/src/soc/intel/skylake/bootblock/cpu.c b/src/soc/intel/skylake/bootblock/cpu.c
index d713974358..8c1e58a65f 100644
--- a/src/soc/intel/skylake/bootblock/cpu.c
+++ b/src/soc/intel/skylake/bootblock/cpu.c
@@ -15,14 +15,11 @@
  */
 
 #include <stdint.h>
-#include <arch/cpu.h>
-#include <cpu/x86/cache.h>
-#include <cpu/x86/msr.h>
-#include <cpu/x86/mtrr.h>
-#include <device/pci_def.h>
+#include <delay.h>
 #include <arch/io.h>
 #include <cpu/intel/microcode/microcode.c>
 #include <reset.h>
+#include <soc/bootblock.h>
 #include <soc/iomap.h>
 #include <soc/msr.h>
 #include <soc/pci_devs.h>
@@ -33,45 +30,6 @@
 /* Soft Reset Data Register Bit 6-11 = Flex Ratio */
 #define FLEX_RATIO_BIT	6
 
-static void set_var_mtrr(
-	unsigned reg, unsigned base, unsigned size, unsigned type)
-
-{
-	/* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
-	msr_t basem, maskm;
-	basem.lo = base | type;
-	basem.hi = 0;
-	wrmsr(MTRR_PHYS_BASE(reg), basem);
-	maskm.lo = ~(size - 1) | MTRR_PHYS_MASK_VALID;
-	maskm.hi = (1 << (CONFIG_CPU_ADDR_BITS - 32)) - 1;
-	wrmsr(MTRR_PHYS_MASK(reg), maskm);
-}
-
-static void enable_rom_caching(void)
-{
-	msr_t msr;
-
-	disable_cache();
-	set_var_mtrr(1, CACHE_ROM_BASE, CACHE_ROM_SIZE, MTRR_TYPE_WRPROT);
-	enable_cache();
-
-	/* Enable Variable MTRRs */
-	msr.hi = 0x00000000;
-	msr.lo = 0x00000800;
-	wrmsr(MTRR_DEF_TYPE_MSR, msr);
-}
-
-static void bootblock_mdelay(int ms)
-{
-	u32 target = ms * 24 * 1000;
-	msr_t current;
-	msr_t start = rdmsr(MSR_COUNTER_24_MHZ);
-
-	do {
-		current = rdmsr(MSR_COUNTER_24_MHZ);
-	} while ((current.lo - start.lo) < target);
-}
-
 static void set_pch_cpu_strap(u8 flex_ratio)
 {
 	uint8_t *spibar = (void *)SPI_BASE_ADDRESS;
@@ -135,31 +93,15 @@ static void set_flex_ratio_to_tdp_nominal(void)
 	set_pch_cpu_strap(nominal_ratio);
 
 	/* Delay before reset to avoid potential TPM lockout */
-	bootblock_mdelay(30);
+	mdelay(30);
 
 	/* Issue soft reset, will be "CPU only" due to soft reset data */
 	soft_reset();
 }
 
-static void check_for_clean_reset(void)
-{
-	msr_t msr;
-	msr = rdmsr(MTRR_DEF_TYPE_MSR);
-
-	/*
-	 * Use the MTRR default type MSR as a proxy for detecting INIT#.
-	 * Reset the system if any known bits are set in that MSR. That is
-	 * an indication of the CPU not being properly reset.
-	 */
-	if (msr.lo & (MTRR_DEF_TYPE_EN | MTRR_DEF_TYPE_FIX_EN))
-		soft_reset();
-}
-
-static void bootblock_cpu_init(void)
+void bootblock_cpu_init(void)
 {
 	/* Set flex ratio and reset if needed */
 	set_flex_ratio_to_tdp_nominal();
-	check_for_clean_reset();
-	enable_rom_caching();
 	intel_update_microcode_from_cbfs();
 }
diff --git a/src/soc/intel/skylake/bootblock/pch.c b/src/soc/intel/skylake/bootblock/pch.c
index 94ed844d3b..569611502e 100644
--- a/src/soc/intel/skylake/bootblock/pch.c
+++ b/src/soc/intel/skylake/bootblock/pch.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2014 Google Inc.
  * Copyright (C) 2015 Intel Corporation.
+ * Copyright (C) 2016 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -14,9 +15,11 @@
  * GNU General Public License for more details.
  */
 #include <arch/io.h>
+#include <soc/bootblock.h>
 #include <soc/iomap.h>
 #include <soc/lpc.h>
 #include <soc/pci_devs.h>
+#include <soc/pcr.h>
 #include <soc/spi.h>
 
 /*
@@ -51,8 +54,21 @@ static void enable_spibar(void)
 	pci_write_config8(dev, PCI_COMMAND, pcireg);
 }
 
-static void bootblock_southbridge_init(void)
+static void enable_p2sbbar(void)
+{
+	device_t dev = PCH_DEV_P2SB;
+
+	/* Enable PCR Base address in PCH */
+	pci_write_config32(dev, PCI_BASE_ADDRESS_0, PCH_PCR_BASE_ADDRESS);
+
+	/* Enable P2SB MSE */
+	pci_write_config8(dev, PCI_COMMAND,
+			  PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+}
+
+void bootblock_pch_early_init(void)
 {
 	enable_spibar();
 	enable_spi_prefetch();
+	enable_p2sbbar();
 }
diff --git a/src/soc/intel/skylake/bootblock/systemagent.c b/src/soc/intel/skylake/bootblock/systemagent.c
index a65be99429..608110e253 100644
--- a/src/soc/intel/skylake/bootblock/systemagent.c
+++ b/src/soc/intel/skylake/bootblock/systemagent.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2014 Google Inc.
  * Copyright (C) 2015 Intel Corporation.
+ * Copyright (C) 2016 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,10 +16,11 @@
  */
 
 #include <arch/io.h>
+#include <soc/bootblock.h>
 #include <soc/pci_devs.h>
 #include <soc/systemagent.h>
 
-static void bootblock_northbridge_init(void)
+void bootblock_systemagent_early_init(void)
 {
 	uint32_t reg;
 
diff --git a/src/soc/intel/skylake/romstage/uart.c b/src/soc/intel/skylake/bootblock/uart.c
index dc417e0d7a..ff1687c520 100644
--- a/src/soc/intel/skylake/romstage/uart.c
+++ b/src/soc/intel/skylake/bootblock/uart.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2015 Google Inc.
  * Copyright (C) 2015 Intel Corporation
+ * Copyright (C) 2016 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,9 +19,9 @@
 #include <console/uart.h>
 #include <device/pci_def.h>
 #include <stdint.h>
+#include <soc/bootblock.h>
 #include <soc/pci_devs.h>
 #include <soc/pcr.h>
-#include <soc/romstage.h>
 #include <soc/serialio.h>
 #include <gpio.h>
 
@@ -53,7 +54,7 @@ void pch_uart_init(void)
 	/*
 	 * Set M and N divisor inputs and enable clock.
 	 * Main reference frequency to UART is:
-	 *  120MHz * M / N = 120MHz * 48 / 3125 = 1843200Hz
+	 * 120MHz * M / N = 120MHz * 48 / 3125 = 1843200Hz
 	 */
 	tmp = read32(base + SIO_REG_PPR_CLOCK);
 	tmp |= SIO_REG_PPR_CLOCK_EN | SIO_REG_PPR_CLOCK_UPDATE |
diff --git a/src/soc/intel/skylake/include/soc/bootblock.h b/src/soc/intel/skylake/include/soc/bootblock.h
new file mode 100644
index 0000000000..10e1e03e22
--- /dev/null
+++ b/src/soc/intel/skylake/include/soc/bootblock.h
@@ -0,0 +1,28 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _SOC_SKYLAKE_BOOTBLOCK_H_
+#define _SOC_SKYLAKE_BOOTBLOCK_H_
+
+/* Bootblock pre console init programing */
+void bootblock_cpu_init(void);
+void bootblock_pch_early_init(void);
+void bootblock_systemagent_early_init(void);
+
+void pch_uart_init(void);
+/* Bootblock post console init programing */
+void pch_enable_lpc(void);
+
+#endif
diff --git a/src/soc/intel/skylake/include/soc/romstage.h b/src/soc/intel/skylake/include/soc/romstage.h
index 56bace15a7..71887aa165 100644
--- a/src/soc/intel/skylake/include/soc/romstage.h
+++ b/src/soc/intel/skylake/include/soc/romstage.h
@@ -22,7 +22,6 @@
 void i2c_early_init(void);
 void systemagent_early_init(void);
 void pch_early_init(void);
-void pch_uart_init(void);
 void intel_early_me_status(void);
 void report_platform_info(void);
 void set_max_freq(void);
diff --git a/src/soc/intel/skylake/romstage/Makefile.inc b/src/soc/intel/skylake/romstage/Makefile.inc
index 6ae81378a4..7a13084bf5 100644
--- a/src/soc/intel/skylake/romstage/Makefile.inc
+++ b/src/soc/intel/skylake/romstage/Makefile.inc
@@ -1,13 +1,10 @@
-verstage-y += cpu.c
-verstage-y += i2c.c
-verstage-y += pch.c
+bootblock-y += cpu.c
+bootblock-y += i2c.c
+bootblock-y += pch.c
+bootblock-y += report_platform.c
+bootblock-y += smbus.c
+
 verstage-y += power_state.c
-verstage-y += report_platform.c
-verstage-y += romstage.c
-verstage-y += smbus.c
-verstage-y += spi.c
-verstage-y += systemagent.c
-verstage-y += uart.c
 
 romstage-y += cpu.c
 romstage-y += i2c.c
@@ -18,4 +15,3 @@ romstage-y += romstage.c
 romstage-y += smbus.c
 romstage-y += spi.c
 romstage-y += systemagent.c
-romstage-y += uart.c
diff --git a/src/soc/intel/skylake/romstage/pch.c b/src/soc/intel/skylake/romstage/pch.c
index 1196c5eb9d..e8c41cbe81 100644
--- a/src/soc/intel/skylake/romstage/pch.c
+++ b/src/soc/intel/skylake/romstage/pch.c
@@ -57,8 +57,7 @@ static void pch_enable_lpc(void)
 	pcr_write16(PID_DMI, R_PCH_PCR_DMI_LPCIOD, lpc_en);
 
 	/* IO Decode Enable */
-	lpc_en = CNF1_LPC_EN | CNF2_LPC_EN | GAMEL_LPC_EN | GAMEH_LPC_EN |
-		COMA_LPC_EN | KBC_LPC_EN | MC_LPC_EN;
+	lpc_en = COMA_LPC_EN | KBC_LPC_EN | MC_LPC_EN;
 	pci_write_config16(PCH_DEV_LPC, LPC_EN, lpc_en);
 	pcr_write16(PID_DMI, R_PCH_PCR_DMI_LPCIOE, lpc_en);
 
diff --git a/src/soc/intel/skylake/romstage/romstage.c b/src/soc/intel/skylake/romstage/romstage.c
index b16e5aa22c..56a5a92255 100644
--- a/src/soc/intel/skylake/romstage/romstage.c
+++ b/src/soc/intel/skylake/romstage/romstage.c
@@ -49,24 +49,6 @@ void soc_pre_ram_init(struct romstage_params *params)
 	soc_fill_pei_data(params->pei_data);
 }
 
-/* SOC initialization before the console is enabled. */
-void car_soc_pre_console_init(void)
-{
-	/* System Agent Early Initialization */
-	systemagent_early_init();
-
-	if (IS_ENABLED(CONFIG_UART_DEBUG))
-		pch_uart_init();
-}
-
-void car_soc_post_console_init(void)
-{
-	report_platform_info();
-	set_max_freq();
-	pch_early_init();
-	i2c_early_init();
-}
-
 int get_sw_write_protect_state(void)
 {
 	u8 status;