Merge tag 'v2023.10-rc4' into next

[J-u-boot.git] / include / event.h

diff --git a/include/event.h b/include/event.h
index 062b5847897e2b78c51a939d735fa66f20fa8572..c37deae94527a6bbd110ebfe9faef7683e0fa43e 100644 (file)
--- a/include/event.h
+++ b/include/event.h
@@ -19,28 +19,135 @@
  * @EVT_DM_PRE_PROBE: Device is about to be probed
  */
 enum event_t {
-       EVT_NONE,
+       /**
+        * @EVT_NONE: This zero value is not used for events.
+        */
+       EVT_NONE = 0,
+
+       /**
+        * @EVT_TEST: This event is used in unit tests.
+        */
        EVT_TEST,
 
-       /* Events related to driver model */
+       /**
+        * @EVT_DM_POST_INIT_F:
+        * This event is triggered after pre-relocation initialization of the
+        * driver model. Its parameter is NULL.
+        * A non-zero return code from the event handler let's the boot process
+        * fail.
+        */
        EVT_DM_POST_INIT_F,
+
+       /**
+        * @EVT_DM_POST_INIT_R:
+        * This event is triggered after post-relocation initialization of the
+        * driver model. Its parameter is NULL.
+        * A non-zero return code from the event handler let's the boot process
+        * fail.
+        */
+       EVT_DM_POST_INIT_R,
+
+       /**
+        * @EVT_DM_PRE_PROBE:
+        * This event is triggered before probing a device. Its parameter is the
+        * device to be probed.
+        * A non-zero return code from the event handler lets the device not
+        * being probed.
+        */
        EVT_DM_PRE_PROBE,
+
+       /**
+        * @EVT_DM_POST_PROBE:
+        * This event is triggered after probing a device. Its parameter is the
+        * device that was probed.
+        * A non-zero return code from the event handler leaves the device in
+        * the unprobed state and therefore not usable.
+        */
        EVT_DM_POST_PROBE,
+
+       /**
+        * @EVT_DM_PRE_REMOVE:
+        * This event is triggered after removing a device. Its parameter is
+        * the device to be removed.
+        * A non-zero return code from the event handler stops the removal of
+        * the device before any changes.
+        */
        EVT_DM_PRE_REMOVE,
+
+       /**
+        * @EVT_DM_POST_REMOVE:
+        * This event is triggered before removing a device. Its parameter is
+        * the device that was removed.
+        * A non-zero return code stops from the event handler the removal of
+        * the device after all removal changes. The previous state is not
+        * restored. All children will be gone and the device may not be
+        * functional.
+        */
        EVT_DM_POST_REMOVE,
 
-       /* Init hooks */
+       /**
+        * @EVT_MISC_INIT_F:
+        * This event is triggered during the initialization sequence before
+        * relocation. Its parameter is NULL.
+        * A non-zero return code from the event handler let's the boot process
+        * fail.
+        */
        EVT_MISC_INIT_F,
 
-       /* Fpga load hook */
+       /*
+        * Emitted before relocation to set up Firmware Support Package
+        *
+        * Where U-Boot relies on binary blobs to handle part of the system
+        * init, this event can be used to set up the blobs. This is used on
+        * some Intel platforms
+        */
+       EVT_FSP_INIT_F,
+
+       /*
+        * Emitted just before jumping to the main loop
+        *
+        * Some boards need to perform initialisation immediately before control
+        * is passed to the command-line interpreter (e.g. for init that depend
+        * on later phases in the init sequence).
+        *
+        * Some parts can be only initialized if all others (like Interrupts)
+        * are up and running (e.g. the PC-style ISA keyboard).
+        */
+       EVT_LAST_STAGE_INIT,
+
+       /**
+        * @EVT_FPGA_LOAD:
+        * The FPGA load hook is called after loading an FPGA with a new binary.
+        * Its parameter is of type struct event_fpga_load and contains
+        * information about the loaded image.
+        */
        EVT_FPGA_LOAD,
 
-       /* Device tree fixups before booting */
+       /**
+        * @EVT_FT_FIXUP:
+        * This event is triggered during device-tree fix up after all
+        * other device-tree fixups have been executed.
+        * Its parameter is of type struct event_ft_fixup which contains
+        * the address of the device-tree to fix up and the list of images to be
+        * booted.
+        * A non-zero return code from the event handler let's booting the
+        * images fail.
+        */
        EVT_FT_FIXUP,
 
-       /* To be called once, before calling main_loop() */
+       /**
+        * @EVT_MAIN_LOOP:
+        * This event is triggered immediately before calling main_loop() which
+        * is the entry point of the command line. Its parameter is NULL.
+        * A non-zero return value causes the boot to fail.
+        */
        EVT_MAIN_LOOP,
 
+       /**
+        * @EVT_COUNT:
+        * This constants holds the maximum event number + 1 and is used when
+        * looping over all event classes.
+        */
        EVT_COUNT
 };
 
@@ -195,7 +302,7 @@ static inline const char *event_spy_id(struct evspy_info *spy)
  * away the linker-list entry sometimes, e.g. with the EVT_FT_FIXUP entry in
  * vbe_simple.c - so for now, make it global.
  */
-#define EVENT_SPY(_type, _func) \
+#define EVENT_SPY_FULL(_type, _func) \
        __used ll_entry_declare(struct evspy_info, _type ## _3_ ## _func, \
                evspy_info) = _ESPY_REC(_type, _func)