Furquan Shaikh (furquan(a)google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17090
-gerrit
commit 136b4accfdfb86487fc54747230f71e2da653c08
Author: Furquan Shaikh <furquan(a)chromium.org>
Date: Fri Oct 21 16:37:41 2016 -0700
arch/x86/acpigen: Add support for _DSM method generation
Add acpigen_write_dsm that generates ACPI AML code for _DSM
method. Caller should provide set of callbacks with callback[i]
corresponding to function index i of DSM method. Local0 and Local1
should not be used in any of the callbacks.
BUG=chrome-os-partner:57846
Change-Id: Ie18cba080424488fe00cc626ea50aa92c1dbb199
Signed-off-by: Furquan Shaikh <furquan(a)chromium.org>
---
src/arch/x86/acpigen.c | 60 +++++++++++++++++++++++++++++++++++++
src/arch/x86/include/arch/acpigen.h | 8 +++++
2 files changed, 68 insertions(+)
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c
index 35735b5..7600100 100644
--- a/src/arch/x86/acpigen.c
+++ b/src/arch/x86/acpigen.c
@@ -1046,6 +1046,66 @@ void acpigen_write_return_byte(uint8_t arg)
acpigen_write_byte(arg);
}
+/*
+ * Generate ACPI AML code for _DSM method.
+ * This function takes as input uuid for the device, set of callbacks and
+ * argument to pass into the callbacks. Callbacks should ensure that Local0 and
+ * Local1 are left untouched. Use of Local2-Local7 is permitted in callbacks.
+ */
+void acpigen_write_dsm(const char *uuid, void (*callbacks[])(void *),
+ size_t count, void *arg)
+{
+ size_t i;
+
+ /* Method (_DSM, 4, Serialized) */
+ acpigen_write_method_serialized("_DSM", 0x4);
+
+ /* ToBuffer (Arg0, Local0) */
+ acpigen_write_to_buffer(ARG0_OP, LOCAL0_OP);
+
+ /* If (LEqual (Local0, ToUUID(uuid))) */
+ acpigen_write_if();
+ acpigen_emit_byte(LEQUAL_OP);
+ acpigen_emit_byte(LOCAL0_OP);
+ acpigen_write_uuid(uuid);
+
+ /* ToInteger (Arg2, Local1) */
+ acpigen_write_to_integer(ARG2_OP, LOCAL1_OP);
+ acpigen_write_debug_op(LOCAL1_OP);
+
+ for (i = 0; i < count; i++) {
+ /* If (Lequal (Local1, i)) */
+ acpigen_write_if_lequal(LOCAL1_OP, i);
+
+ /* Callback to write if handler. */
+ if (callbacks[i])
+ callbacks[i](arg);
+
+ acpigen_pop_len(); /* If */
+
+ /* Else */
+ acpigen_write_else();
+ }
+
+ /* Default case: Return (Buffer (One) { 0x0 }) */
+ acpigen_write_return_singleton_buffer(0x0);
+
+ /* Pop lengths for all the else clauses. */
+ for (i = 0; i < count; i++)
+ acpigen_pop_len();
+
+ acpigen_pop_len(); /* If (LEqual (Local0, ToUUID(uuid))) */
+
+ /* Else */
+ acpigen_write_else();
+
+ /* Return (Buffer (One) { 0x0 }) */
+ acpigen_write_return_singleton_buffer(0x0);
+
+ acpigen_pop_len(); /* Else */
+ acpigen_pop_len(); /* Method _DSM */
+}
+
/* Soc-implemented functions -- weak definitions. */
int __attribute__((weak)) acpigen_soc_read_rx_gpio(unsigned int gpio_num)
{
diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index dd83db8..7c15a31 100644
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -167,6 +167,14 @@ void acpigen_write_byte_buffer(uint8_t *arr, uint8_t size);
void acpigen_write_return_byte_buffer(uint8_t *arr, uint8_t size);
void acpigen_write_return_singleton_buffer(uint8_t arg);
void acpigen_write_return_byte(uint8_t arg);
+/*
+ * Generate ACPI AML code for _DSM method.
+ * This function takes as input uuid for the device, set of callbacks and
+ * argument to pass into the callbacks. Callbacks should ensure that Local0 and
+ * Local1 are left untouched. Use of Local2-Local7 is permitted in callbacks.
+ */
+void acpigen_write_dsm(const char *uuid, void (*callbacks[])(void *),
+ size_t count, void *arg);
int get_cst_entries(acpi_cstate_t **);
Furquan Shaikh (furquan(a)google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17091
-gerrit
commit ee4f76f70a42978e7cb1f53f0f15be6a962713b2
Author: Furquan Shaikh <furquan(a)chromium.org>
Date: Fri Oct 21 16:40:17 2016 -0700
arch/x86/acpigen_dsm: Add support for DSM types
Currently, the only supported DSM type is I2C
HID(3CDFF6F7-4267-4555-AD05-B30A3D8938DE). This provides the required
callbacks for generating ACPI AML codes for different function
identifiers for I2C HID.
BUG=chrome-os-partner:57846
Change-Id: Ia403e11f7ce4824956e3c879547ec927478db7b1
Signed-off-by: Furquan Shaikh <furquan(a)chromium.org>
---
src/arch/x86/Makefile.inc | 1 +
src/arch/x86/acpigen_dsm.c | 65 +++++++++++++++++++++++++++++++++
src/arch/x86/include/arch/acpigen_dsm.h | 27 ++++++++++++++
3 files changed, 93 insertions(+)
diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc
index 782ca63..c4bb1cc 100644
--- a/src/arch/x86/Makefile.inc
+++ b/src/arch/x86/Makefile.inc
@@ -313,6 +313,7 @@ ifeq ($(CONFIG_ARCH_RAMSTAGE_X86_32)$(CONFIG_ARCH_RAMSTAGE_X86_64),y)
ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c
ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpigen.c
+ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpigen_dsm.c
ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi_device.c
ramstage-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.c
ramstage-y += boot.c
diff --git a/src/arch/x86/acpigen_dsm.c b/src/arch/x86/acpigen_dsm.c
new file mode 100644
index 0000000..c6d614a
--- /dev/null
+++ b/src/arch/x86/acpigen_dsm.c
@@ -0,0 +1,65 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google Inc.
+ *
+ * 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.
+ */
+
+#include <arch/acpigen.h>
+#include <arch/acpigen_dsm.h>
+#include <stdlib.h>
+
+/* ------------------- I2C HID DSM ---------------------------- */
+
+#define ACPI_DSM_I2C_HID_UUID "3CDFF6F7-4267-4555-AD05-B30A3D8938DE"
+
+static void i2c_hid_func0_cb(void *arg)
+{
+ /* ToInteger (Arg1, Local2) */
+ acpigen_write_to_integer(ARG1_OP, LOCAL2_OP);
+ /* If (LEqual (Local2, 0x0)) */
+ acpigen_write_if_lequal(LOCAL2_OP, 0x0);
+ /* Return (Buffer (One) { 0x1f }) */
+ acpigen_write_return_singleton_buffer(0x1f);
+ acpigen_pop_len(); /* Pop : If */
+ /* Else */
+ acpigen_write_else();
+ /* If (LEqual (Local2, 0x1)) */
+ acpigen_write_if_lequal(LOCAL2_OP, 0x1);
+ /* Return (Buffer (One) { 0x3f }) */
+ acpigen_write_return_singleton_buffer(0x3f);
+ acpigen_pop_len(); /* Pop : If */
+ /* Else */
+ acpigen_write_else();
+ /* Return (Buffer (One) { 0x0 }) */
+ acpigen_write_return_singleton_buffer(0x0);
+ acpigen_pop_len(); /* Pop : Else */
+ acpigen_pop_len(); /* Pop : Else */
+}
+
+static void i2c_hid_func1_cb(void *arg)
+{
+ struct dsm_i2c_hid_config *config = arg;
+ acpigen_write_return_byte(config->hid_desc_reg_offset);
+}
+
+static void (*i2c_hid_callbacks[2])(void *) = {
+ i2c_hid_func0_cb,
+ i2c_hid_func1_cb,
+};
+
+void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config)
+{
+ acpigen_write_dsm(ACPI_DSM_I2C_HID_UUID, i2c_hid_callbacks,
+ ARRAY_SIZE(i2c_hid_callbacks), config);
+}
+
+/* ------------------- End: I2C HID DSM ------------------------- */
diff --git a/src/arch/x86/include/arch/acpigen_dsm.h b/src/arch/x86/include/arch/acpigen_dsm.h
new file mode 100644
index 0000000..2d8bb48
--- /dev/null
+++ b/src/arch/x86/include/arch/acpigen_dsm.h
@@ -0,0 +1,27 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google Inc.
+ *
+ * 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 __ARCH_ACPIGEN_DSM_H__
+#define __ARCH_ACPIGEN_DSM_H__
+
+#include <stdint.h>
+
+struct dsm_i2c_hid_config {
+ uint8_t hid_desc_reg_offset;
+};
+
+void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config);
+
+#endif /* __ARCH_ACPIGEN_DSM_H__ */