From a85281a5505bc6a5015012639a14b646482dcdc1 Mon Sep 17 00:00:00 2001
From: vhaudiquet <vhaudiquet@localhost>
Date: Sun, 30 Aug 2026 15:26:47 +0200
Subject: [PATCH] WIP (temporary): green band at board_init_f entry for
 bring-up

---
 common/board_f.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/common/board_f.c b/common/board_f.c
index 9efcd9499a9..eb73e1717c2 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -1074,6 +1074,26 @@ void board_init_f(ulong boot_flags)
 {
 	struct board_f boardf;
 
+	/* TEMPORARY bring-up diagnostics (krane Round 22) — do not
+	 * upstream: green band = board_init_f entered (start.S/crt0 and
+	 * the PIE fixup all completed). */
+	{
+		u32 base = readl((void __iomem *)0x14008f40);
+
+		if (base >= 0x40000000) {
+			u32 *p = (u32 *)(uintptr_t)(base + 400ULL * 4800);
+			int i;
+
+			if (dcache_status())
+				mmu_map_region(base, 0x8ca000, false);
+			for (i = 0; i < 60 * 1200; i++)
+				p[i] = 0x0000ff00;
+			if (dcache_status())
+				flush_dcache_range((uintptr_t)p,
+						   (uintptr_t)(p + 60 * 1200));
+		}
+	}
+	/* end TEMPORARY diagnostics */
 	gd->flags = boot_flags;
 	gd->flags &= ~GD_FLG_HAVE_CONSOLE;
 	gd->boardf = &boardf;