From ec26c6163c9d1cf0422537e8f167a783736aca0c Mon Sep 17 00:00:00 2001
From: caleb crome <caleb@crome.org>
Date: Sun, 12 Feb 2023 11:24:21 -0800
Subject: [PATCH] Turn data cache on This fixes
 https://github.com/hathach/tinyusb/issues/1894.  I'm not really sure if this
 is the correct way to fix it, and I have not tested on all the rest of the
 family members, however, this lets the i.MX1010 work again.

The problem:  the latest SDK update does not enable the data cache by default
This causes an assert in board_init() when attemping to control clock
gating.  I haven't investigated further as to *why* it's a problem, but it
is a problem.
---
 hw/bsp/imxrt/family.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/bsp/imxrt/family.c b/hw/bsp/imxrt/family.c
index fc6e9e266..ecd18bad3 100644
--- a/hw/bsp/imxrt/family.c
+++ b/hw/bsp/imxrt/family.c
@@ -55,6 +55,12 @@ const uint8_t dcd_data[] = { 0x00 };
 
 void board_init(void)
 {
+  // make sure the dcache is on.
+#if defined(__DCACHE_PRESENT) && __DCACHE_PRESENT
+    if (SCB_CCR_DC_Msk != (SCB_CCR_DC_Msk & SCB->CCR))
+        SCB_EnableDCache();
+#endif
+
   // Init clock
   BOARD_BootClockRUN();
   SystemCoreClockUpdate();