From: Mark Kettenis <kettenis@openbsd.org>
Date: Sat, 12 Jul 2025 18:52:27 +0000 (+0200)
Subject: board: vexpress_ca9x4: Enable D-cache and MMU
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3b4604a40b9fd61b87e9d059fc56f04d36f1a380;p=thirdparty%2Fu-boot.git

board: vexpress_ca9x4: Enable D-cache and MMU

Enable the D-cache, which will also enable the MMU.  The latter
make sure we don't do unaligned access on Strongly-ordered memory,
which has UNPREDICTABLE behaviour according the architecture
definition.  This fixes using U-Boot with recent versions of
QEMU's vexpress-ca9 emulation.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
---

diff --git a/board/armltd/vexpress/vexpress_common.c b/board/armltd/vexpress/vexpress_common.c
index 6c374e25e32..3833af59b09 100644
--- a/board/armltd/vexpress/vexpress_common.c
+++ b/board/armltd/vexpress/vexpress_common.c
@@ -165,3 +165,11 @@ void smp_set_core_boot_addr(unsigned long addr, int corenr)
 	writel(addr, CONFIG_SYSFLAGS_ADDR);
 }
 #endif
+
+#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
+void enable_caches(void)
+{
+	/* Enable D-cache. I-cache is already enabled in start.S */
+	dcache_enable();
+}
+#endif