[PATCH v2 3/5] common/board_f: Catch bloblist before starting resevations

Devarsh Thakkar
2023-10-31T13:12:54Z

Start reservations needed for init sequence only after catching
bloblists from previous stage.

This is to avoid catching bloblists in the middle causing
gaps while u-boot is reserving.

Adjust the relocaddr as per video hand-off information
received from previous stage so that further reservations
start only after regions reserved for previous stages

Skip reservation for video memory if it was already
filled by a bloblist.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
---
V2: Fix typo in commit title and checkpatch warnings/checks
---
common/board_f.c | 33 ++++++++++++++++++++++++++++++---
1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/common/board_f.c b/common/board_f.c
index d4d7d01f8f..acf802c9cb 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -403,7 +403,7 @@ __weak int arch_reserve_mmu(void)
return 0;
}

-static int reserve_video(void)
+static int reserve_video_from_videoblob(void)
{
if (IS_ENABLED(CONFIG_SPL_VIDEO_HANDOFF) && spl_phase() > PHASE_SPL) {
struct video_handoff *ho;
@@ -412,8 +412,34 @@ static int reserve_video(void)
if (!ho)
return log_msg_ret("blf", -ENOENT);
video_reserve_from_bloblist(ho);
- gd->relocaddr = ho->fb;
- } else if (CONFIG_IS_ENABLED(VIDEO)) {
+
+ /* Sanity check fb from blob is before current relocaddr */
+ if (likely(gd->relocaddr > (unsigned long)ho->fb))
+ gd->relocaddr = ho->fb;
+ }
+
+ return 0;
+}
+
+/*
+ * Check if any bloblist received specifying reserved areas from previous stage and adjust
+ * gd->relocaddr accordingly, so that we start reserving after pre-reserved areas
+ * from previous stage.
+ *
+ * NOTE:
+ * IT is recommended that all bloblists from previous stage are reserved from ram_top
+ * as next stage will simply start reserving further regions after them.
+ */
+static int setup_relocaddr_from_bloblist(void)
+{
+ reserve_video_from_videoblob();
+
+ return 0;
+}
+
+static int reserve_video(void)
+{
+ if (CONFIG_IS_ENABLED(VIDEO)) {
ulong addr;
int ret;

@@ -923,6 +949,7 @@ static const init_fnc_t init_sequence_f[] = {
reserve_pram,
#endif
reserve_round_4k,
+ setup_relocaddr_from_bloblist,
arch_reserve_mmu,
reserve_video,
reserve_trace,
--
2.34.1