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ee6847d19b
This patch is a major overhaul of the device properties. The properties
are saved directly in the device state struct now, the linked list of
property values is gone.
Advantages:
* We don't have to maintain the list with the property values.
* The value in the property list and the value actually used by
the device can't go out of sync any more (used to happen for
the pci.devfn == -1 case) because there is only one place where
the value is stored.
* A record describing the property is required now, you can't set
random properties any more.
There are bus-specific and device-specific properties. The former
should be used for properties common to all bus drivers. Typical
use case is bus addressing, i.e. pci.devfn and i2c.address.
Properties have a PropertyInfo struct attached with name, size and
function pointers to parse and print properties. A few common property
types have PropertyInfos defined in qdev-properties.c. Drivers are free
to implement their own very special property parsers if needed.
Properties can have default values. If unset they are zero-filled.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
33 lines
826 B
C
33 lines
826 B
C
#include "qdev.h"
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#include "qdev-addr.h"
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#include "targphys.h"
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/* --- target physical address --- */
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static int parse_taddr(DeviceState *dev, Property *prop, const char *str)
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{
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target_phys_addr_t *ptr = qdev_get_prop_ptr(dev, prop);
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*ptr = strtoull(str, NULL, 16);
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return 0;
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}
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static int print_taddr(DeviceState *dev, Property *prop, char *dest, size_t len)
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{
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target_phys_addr_t *ptr = qdev_get_prop_ptr(dev, prop);
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return snprintf(dest, len, "0x" TARGET_FMT_plx, *ptr);
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}
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PropertyInfo qdev_prop_taddr = {
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.name = "taddr",
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.type = PROP_TYPE_TADDR,
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.size = sizeof(target_phys_addr_t),
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.parse = parse_taddr,
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.print = print_taddr,
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};
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void qdev_prop_set_taddr(DeviceState *dev, const char *name, target_phys_addr_t value)
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{
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qdev_prop_set(dev, name, &value, PROP_TYPE_TADDR);
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}
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