From: Parth Dixit <parth.di...@linaro.org>
Add generic way to use device from acpi similar to the way it is
supported in device tree.
Signed-off-by: Parth Dixit <parth.di...@linaro.org>
Signed-off-by: Shannon Zhao <shannon.z...@linaro.org>
---
xen/arch/arm/device.c | 19 +++++++++++++++++++
xen/arch/arm/xen.lds.S | 7 +++++++
xen/include/asm-arm/device.h | 30 ++++++++++++++++++++++++++++++
3 files changed, 56 insertions(+)
diff --git a/xen/arch/arm/device.c b/xen/arch/arm/device.c
index 0b53f6a..5494de0 100644
--- a/xen/arch/arm/device.c
+++ b/xen/arch/arm/device.c
@@ -22,6 +22,7 @@
#include <xen/lib.h>
extern const struct device_desc _sdevice[], _edevice[];
+extern const struct acpi_device_desc _asdevice[], _aedevice[];
int __init device_init(struct dt_device_node *dev, enum device_class class,
const void *data)
@@ -50,6 +51,24 @@ int __init device_init(struct dt_device_node *dev, enum
device_class class,
return -EBADF;
}
+int __init acpi_device_init(enum device_class class, const void *data, int
class_type)
+{
+ const struct acpi_device_desc *desc;
+
+ for ( desc = _asdevice; desc != _aedevice; desc++ )
+ {
+ if ( ( desc->class != class ) && ( desc->class_type != class_type ) )
+ continue;
+
+
+ ASSERT(desc->init != NULL);
+
+ return desc->init(data);
+ }
+
+ return -EBADF;
+}
+
enum device_class device_get_class(const struct dt_device_node *dev)
{
const struct device_desc *desc;
diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
index 0488f37..60802f6 100644
--- a/xen/arch/arm/xen.lds.S
+++ b/xen/arch/arm/xen.lds.S
@@ -100,6 +100,13 @@ SECTIONS
_edevice = .;
} :text
+ . = ALIGN(8);
+ .adev.info : {
+ _asdevice = .;
+ *(.adev.info)
+ _aedevice = .;
+ } :text
+
. = ALIGN(PAGE_SIZE); /* Init code and data */
__init_begin = .;
.init.text : {
diff --git a/xen/include/asm-arm/device.h b/xen/include/asm-arm/device.h
index 5d0a4cd..085f221 100644
--- a/xen/include/asm-arm/device.h
+++ b/xen/include/asm-arm/device.h
@@ -50,6 +50,27 @@ struct device_desc {
int (*init)(struct dt_device_node *dev, const void *data);
};
+struct acpi_device_desc {
+ /* Device name */
+ const char *name;
+ /* Device class */
+ enum device_class class;
+ /* type of device supported by the driver */
+ const int class_type;
+ /* Device initialization */
+ int (*init)(const void *data);
+};
+
+/**
+ * acpi_device_init - Initialize a device
+ * @class: class of the device (serial, network...)
+ * @data: specific data for initializing the device
+ *
+ * Return 0 on success.
+ */
+int __init acpi_device_init(enum device_class class,
+ const void *data, int class_type);
+
/**
* device_init - Initialize a device
* @dev: device to initialize
@@ -78,6 +99,15 @@ __section(".dev.info") = {
\
#define DT_DEVICE_END \
};
+#define ACPI_DEVICE_START(_name, _namestr, _class) \
+static const struct acpi_device_desc __dev_desc_##_name __used \
+__attribute__((__section__(".adev.info"))) = { \
+ .name = _namestr, \
+ .class = _class, \
+
+#define ACPI_DEVICE_END \
+};
+
#endif /* __ASM_ARM_DEVICE_H */
/*
--
2.1.0
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
