WIP (temporary): green band at board_init_f entry for bring-up

2026-08-30 15:26:47 +02:00
parent 46283a7722
commit a85281a550
1 changed files with 20 additions and 0 deletions
@@ -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;