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[RFC,v2,37/48] event: add event to notify lmb memory map changes

Message ID 20240704073544.670249-38-sughosh.ganu@linaro.org
State Superseded
Headers show
Series Make U-Boot memory reservations coherent | expand

Commit Message

Sughosh Ganu July 4, 2024, 7:35 a.m. UTC 
Add an event which would be used for notifying changes in the
LMB modules' memory map. This is to be used for having a
synchronous view of the memory that is currently in use, and that is
available for allocations.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
---
Changes since V1:
* Remove the event for EFI notifications.

 common/event.c  |  2 ++
 include/event.h | 14 ++++++++++++++
 2 files changed, 16 insertions(+)
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Patch

diff --git a/common/event.c b/common/event.c
index dda569d447..fc8002603c 100644
--- a/common/event.c
+++ b/common/event.c
@@ -48,6 +48,8 @@  const char *const type_name[] = {
 
 	/* main loop events */
 	"main_loop",
+
+	"lmb_map_update",
 };
 
 _Static_assert(ARRAY_SIZE(type_name) == EVT_COUNT, "event type_name size");
diff --git a/include/event.h b/include/event.h
index fb353ad623..fce7e96170 100644
--- a/include/event.h
+++ b/include/event.h
@@ -153,6 +153,14 @@  enum event_t {
 	 */
 	EVT_MAIN_LOOP,
 
+	/**
+	 * @EVT_LMB_MAP_UPDATE:
+	 * This event is triggered on an update to the LMB reserved memory
+	 * region. This can be used to notify about any LMB memory allocation
+	 * or freeing of memory having occurred.
+	 */
+	EVT_LMB_MAP_UPDATE,
+
 	/**
 	 * @EVT_COUNT:
 	 * This constants holds the maximum event number + 1 and is used when
@@ -203,6 +211,12 @@  union event_data {
 		oftree tree;
 		struct bootm_headers *images;
 	} ft_fixup;
+
+	struct event_lmb_map_update {
+		u64 base;
+		u64 size;
+		u8 op;
+	} lmb_map;
 };
 
 /**