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authorSubrata Banik <subrata.banik@intel.com>2016-08-05 18:25:55 +0530
committerAaron Durbin <adurbin@chromium.org>2016-08-11 16:03:29 +0200
commitc1645faeff3f128efcf411a98772ac9d327fc7aa (patch)
tree46aeceb26234b91eaa7a762c7346fd2bc132d9a1 /src/soc/intel
parentd7127b09ae6ccd86f45d9c19cac3cb74d980af54 (diff)
soc/intel/common: Add support for serial console based ACPI debug
This patch enables serial debug functionality for ASL code based on UART type(legacy/LPSS). From Skylake onwards all Intel platform uses LPSS based UART for serial console hence provide option to redirect ASL log over LPSS UART. Example: Name (OBJ, 0x12) APRT (OBJ) APRT ("CORE BOOT") Output: 0x12 CORE BOOT BUG=none BRANCH=none TEST=Built and boot kunimitsu to ensure to be able to get ASL console log. Change-Id: I18c65654b8eb1ac27af1f283d413376fd79d47db Signed-off-by: Subrata Banik <subrata.banik@intel.com> Reviewed-on: https://review.coreboot.org/16070 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel')
-rw-r--r--src/soc/intel/common/Kconfig6
-rw-r--r--src/soc/intel/common/acpi/acpi_debug.asl113
2 files changed, 119 insertions, 0 deletions
diff --git a/src/soc/intel/common/Kconfig b/src/soc/intel/common/Kconfig
index a32252edd8..7726bf121f 100644
--- a/src/soc/intel/common/Kconfig
+++ b/src/soc/intel/common/Kconfig
@@ -41,6 +41,12 @@ config SOC_INTEL_COMMON_ACPI_WAKE_SOURCE
bool
default n
+config ACPI_CONSOLE
+ bool
+ default n
+ help
+ Provide a mechanism for serial console based ACPI debug.
+
config SOC_INTEL_COMMON_LPSS_I2C
bool
default n
diff --git a/src/soc/intel/common/acpi/acpi_debug.asl b/src/soc/intel/common/acpi/acpi_debug.asl
new file mode 100644
index 0000000000..5b686f2375
--- /dev/null
+++ b/src/soc/intel/common/acpi/acpi_debug.asl
@@ -0,0 +1,113 @@
+/*
+ * 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.
+ */
+
+#if IS_ENABLED(CONFIG_ACPI_CONSOLE)
+
+#include <soc/iomap.h>
+
+Name (UFLG, IS_ENABLED(CONFIG_CONSOLE_SERIAL))
+
+Method (LURT, 1, Serialized)
+{
+ If (LEqual(Arg0, 0)) { /* 0 = 0x3f8 */
+ Store (0x3f8, Local0)
+ } ElseIf (LEqual(Arg0, 1)) { /* 1 = 0x2f8 */
+ Store (0x2f8, Local0)
+ } ElseIf (LEqual(Arg0, 2)) { /* 2 = 0x3e8 */
+ Store (0x3e8, Local0)
+ } ElseIf (LEqual(Arg0, 3)) { /* 3 = 0x2e8 */
+ Store (0x2e8, Local0)
+ }
+ Return (Local0)
+}
+
+Method (APRT, 1, Serialized)
+{
+ Name(OPDT, 0)
+ Name(INDX, 0)
+ Name(LENG, 0)
+ Name(ADBG, Buffer(256) {0})
+
+ If (LEqual(ObjectType(Arg0), 1)) { /* Integer */
+ ToHexString(Arg0, ADBG)
+ } ElseIf (LEqual(ObjectType(Arg0), 2)) { /* String */
+ Store(Arg0, ADBG)
+ } ElseIf (LEqual(ObjectType(Arg0), 3)) { /* Buffer */
+ ToHexString(Arg0, ADBG)
+ } Else {
+ Store("This type of object is not supported", ADBG)
+ }
+
+ While (LNotEqual(DeRefOf(Index(ADBG, INDX)), 0))
+ {
+ Increment (INDX)
+ }
+ Store (INDX, LENG) /* Length of the String */
+
+#if CONFIG_DRIVERS_UART_8250MEM_32
+ OperationRegion (UBAR, SystemMemory, UART_DEBUG_BASE_ADDRESS, 24)
+ Field (UBAR, AnyAcc, NoLock, Preserve)
+ {
+ TDR, 32, /* Transmit Data Register BAR + 0x000 */
+ IER, 32, /* Interrupt Enable Register BAR + 0x004 */
+ IIR, 32, /* Interrupt Identification Register BAR + 0x008 */
+ LCR, 32, /* Line Control Register BAR + 0x00C */
+ MCR, 32, /* Modem Control Register BAR + 0x010 */
+ LSR, 32 /* Line Status Register BAR + 0x014 */
+ }
+#else
+ OperationRegion (UBAR, SystemIO, LURT (CONFIG_UART_FOR_CONSOLE), 6)
+ Field (UBAR, ByteAcc, NoLock, Preserve)
+ {
+ TDR, 8, /* Transmit Data Register IO Port + 0x0 */
+ IER, 8, /* Interrupt Enable Register IO Port + 0x1 */
+ IIR, 8, /* Interrupt Identification Register IO Port + 0x2 */
+ LCR, 8, /* Line Control Register IO Port + 0x3 */
+ MCR, 8, /* Modem Control Register IO Port + 0x4 */
+ LSR, 8 /* Line Status Register IO Port + 0x5 */
+ }
+#endif
+
+ If (LEqual(UFLG, 0)) {
+ /* Enable Baud Rate Divisor Latch, Set Word length to 8 bit*/
+ Store (0x83, LCR)
+ Store (0x01, IIR)
+ Store (0x03, MCR)
+
+ /* Configure baud rate to 115200 */
+ Store (0x01, TDR)
+ Store (0x00, IER)
+ Store (0x03, LCR) /* Disable Baud Rate Divisor Latch */
+
+ Increment (UFLG)
+ }
+ Store (0x00, INDX)
+ While (LLess (INDX, LENG))
+ {
+ /* Wait for the transmitter t to be ready */
+ While (1)
+ {
+ And (LSR, 0x20, OPDT)
+ If (LNotEqual(OPDT, 0))
+ {
+ Break
+ }
+ }
+ Store (DeRefOf (Index (ADBG, INDX)), TDR)
+ Increment(INDX)
+ }
+} /* End of APRT */
+
+#endif