diff options
| -rw-r--r-- | hw/core/sysbus.c | 11 | ||||
| -rw-r--r-- | include/hw/sysbus.h | 17 |
2 files changed, 28 insertions, 0 deletions
diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c index 92eced9424..278a2d1bdd 100644 --- a/hw/core/sysbus.c +++ b/hw/core/sysbus.c @@ -281,6 +281,9 @@ static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent) static char *sysbus_get_fw_dev_path(DeviceState *dev) { SysBusDevice *s = SYS_BUS_DEVICE(dev); + SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(s); + /* for the explicit unit address fallback case: */ + char *addr, *fw_dev_path; if (s->num_mmio) { return g_strdup_printf("%s@" TARGET_FMT_plx, qdev_fw_name(dev), @@ -289,6 +292,14 @@ static char *sysbus_get_fw_dev_path(DeviceState *dev) if (s->num_pio) { return g_strdup_printf("%s@i%04x", qdev_fw_name(dev), s->pio[0]); } + if (sbc->explicit_ofw_unit_address) { + addr = sbc->explicit_ofw_unit_address(s); + if (addr) { + fw_dev_path = g_strdup_printf("%s@%s", qdev_fw_name(dev), addr); + g_free(addr); + return fw_dev_path; + } + } return g_strdup(qdev_fw_name(dev)); } diff --git a/include/hw/sysbus.h b/include/hw/sysbus.h index d1f3f000f9..34f93c39bf 100644 --- a/include/hw/sysbus.h +++ b/include/hw/sysbus.h @@ -41,6 +41,23 @@ typedef struct SysBusDeviceClass { /*< public >*/ int (*init)(SysBusDevice *dev); + + /* + * Let the sysbus device format its own non-PIO, non-MMIO unit address. + * + * Sometimes a class of SysBusDevices has neither MMIO nor PIO resources, + * yet instances of it would like to distinguish themselves, in + * OpenFirmware device paths, from other instances of the same class on the + * sysbus. For that end we expose this callback. + * + * The implementation is not supposed to change *@dev, or incur other + * observable change. + * + * The function returns a dynamically allocated string. On error, NULL + * should be returned; the unit address portion of the OFW node will be + * omitted then. (This is not considered a fatal error.) + */ + char *(*explicit_ofw_unit_address)(const SysBusDevice *dev); } SysBusDeviceClass; struct SysBusDevice { |