|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC 03/35] xen: arm64: ACPI: Add basic ACPI initialization
From: Naresh Bhat <naresh.bhat@xxxxxxxxxx>
This patch introduce arm-core.c and its related header file
- asm/acpi.h for arch specific variables and functions needed by
ACPI driver core;
- arm-core.c for ARM64 related ACPI implementation for ACPI driver
core;
acpi_boot_table_init() will be called in setup_arch()
to get the RSDP and all the table pointers. with this patch,
we can get ACPI boot-time tables from firmware on ARM64.
Signed-off-by: Naresh Bhat <naresh.bhat@xxxxxxxxxx>
---
xen/arch/arm/arm64/Makefile | 1 +
xen/arch/arm/arm64/acpi/Makefile | 1 +
xen/arch/arm/arm64/acpi/arm-core.c | 97 ++++++++++++++++++++++++++++++++++++++
xen/arch/arm/setup.c | 14 +++++-
xen/include/xen/acpi.h | 11 +++++
5 files changed, 123 insertions(+), 1 deletion(-)
create mode 100644 xen/arch/arm/arm64/acpi/Makefile
create mode 100644 xen/arch/arm/arm64/acpi/arm-core.c
diff --git a/xen/arch/arm/arm64/Makefile b/xen/arch/arm/arm64/Makefile
index c7243f5..49d135f 100644
--- a/xen/arch/arm/arm64/Makefile
+++ b/xen/arch/arm/arm64/Makefile
@@ -1,4 +1,5 @@
subdir-y += lib
+subdir-y += acpi
obj-y += entry.o
diff --git a/xen/arch/arm/arm64/acpi/Makefile b/xen/arch/arm/arm64/acpi/Makefile
new file mode 100644
index 0000000..07e3c44
--- /dev/null
+++ b/xen/arch/arm/arm64/acpi/Makefile
@@ -0,0 +1 @@
+obj-y += arm-core.o
diff --git a/xen/arch/arm/arm64/acpi/arm-core.c
b/xen/arch/arm/arm64/acpi/arm-core.c
new file mode 100644
index 0000000..50a83d6
--- /dev/null
+++ b/xen/arch/arm/arm64/acpi/arm-core.c
@@ -0,0 +1,97 @@
+/*
+ * ARM64 Specific Low-Level ACPI Boot Support
+ *
+ * Copyright (C) 2014, Naresh Bhat <naresh.bhat@xxxxxxxxxx>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#if defined(CONFIG_ARM_64) && defined(CONFIG_ACPI)
+#include <xen/init.h>
+#include <xen/acpi.h>
+
+#include <asm/acpi.h>
+
+/*
+ * We never plan to use RSDT on arm/arm64 as its deprecated in spec but this
+ * variable is still required by the ACPI core
+ */
+u32 acpi_rsdt_forced;
+
+int acpi_noirq; /* skip ACPI IRQ initialization */
+int acpi_strict;
+int acpi_disabled;
+EXPORT_SYMBOL(acpi_disabled);
+
+int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
+EXPORT_SYMBOL(acpi_pci_disabled);
+
+enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
+
+struct acpi_arm_root acpi_arm_rsdp_info; /* info about RSDP from FDT */
+
+int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
+{
+ *irq = -1;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
+
+/*
+ * success: return IRQ number (>0)
+ * failure: return =< 0
+ */
+//int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
+unsigned int acpi_register_gsi (u32 gsi, int edge_level, int active_high_low)
+{
+ return -1;
+}
+EXPORT_SYMBOL_GPL(acpi_register_gsi);
+
+void acpi_unregister_gsi(u32 gsi)
+{
+}
+EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
+
+/*
+ * acpi_boot_table_init() called from setup_arch(), always.
+ * 1. find RSDP and get its address, and then find XSDT
+ * 2. extract all tables and checksums them all
+ *
+ * We can parse ACPI boot-time tables such as FADT, MADT after
+ * this function is called.
+ */
+int __init acpi_boot_table_init(void)
+{
+ int error;
+ /* If acpi_disabled, bail out */
+ if (acpi_disabled)
+ return 1;
+
+ /* Initialize the ACPI boot-time table parser. */
+ error = acpi_table_init();
+ if (error)
+ {
+ disable_acpi();
+ return error;
+ }
+
+ return 0;
+}
+#endif
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 3991d64..7ae126b 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -45,6 +45,8 @@
#include <asm/procinfo.h>
#include <asm/setup.h>
#include <xsm/xsm.h>
+#include <xen/acpi.h>
+#include <asm/acpi.h>
struct bootinfo __initdata bootinfo;
@@ -737,7 +739,18 @@ void __init start_xen(unsigned long boot_phys_offset,
setup_mm(fdt_paddr, fdt_size);
+ system_state = SYS_STATE_boot;
+
vm_init();
+
+/*
+ * Parse the ACPI tables for possible boot-time configuration
+ */
+
+#if defined(CONFIG_ACPI) && defined(CONFIG_ARM_64)
+ acpi_boot_table_init();
+#endif
+
dt_unflatten_host_device_tree();
dt_irq_xlate = gic_irq_xlate;
@@ -802,7 +815,6 @@ void __init start_xen(unsigned long boot_phys_offset,
printk("Failed to bring up CPU %u (error %d)\n", i, ret);
}
}
-
printk("Brought up %ld CPUs\n", (long)num_online_cpus());
/* TODO: smp_cpus_done(); */
diff --git a/xen/include/xen/acpi.h b/xen/include/xen/acpi.h
index 3aeba4a..ff96336 100644
--- a/xen/include/xen/acpi.h
+++ b/xen/include/xen/acpi.h
@@ -42,6 +42,17 @@
#ifdef CONFIG_ACPI_BOOT
+enum acpi_irq_model_id {
+ ACPI_IRQ_MODEL_PIC = 0,
+ ACPI_IRQ_MODEL_IOAPIC,
+ ACPI_IRQ_MODEL_IOSAPIC,
+ ACPI_IRQ_MODEL_PLATFORM,
+ ACPI_IRQ_MODEL_GIC,
+ ACPI_IRQ_MODEL_COUNT
+};
+
+extern enum acpi_irq_model_id acpi_irq_model;
+
enum acpi_interrupt_id {
ACPI_INTERRUPT_PMI = 1,
ACPI_INTERRUPT_INIT,
--
1.9.1
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |