From 7b99a5152fc5f3da77d8e7f885c6d7b96c157ff7 Mon Sep 17 00:00:00 2001
From: Gunar Schorcht <gunar@schorcht.net>
Date: Tue, 15 Nov 2022 22:29:34 +0100
Subject: [PATCH] cpu/stm32: fix RAM_LEN for F427, F429, F437, F439 models

These models have 256 kByte RAM, but the upper 64 kByte are used as CCM data RAM accessible at 0x1000:0000. The access to 0x2003:xxxx leads to a hard fault.
---
 cpu/stm32/stm32_mem_lengths.mk | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpu/stm32/stm32_mem_lengths.mk b/cpu/stm32/stm32_mem_lengths.mk
index d26166a55b3c..2e6471d793a0 100644
--- a/cpu/stm32/stm32_mem_lengths.mk
+++ b/cpu/stm32/stm32_mem_lengths.mk
@@ -159,12 +159,14 @@ ifeq ($(STM32_TYPE), F)
       RAM_LEN = 32K
     else ifneq (, $(filter $(STM32_MODEL), 411 446))
       RAM_LEN = 128K
-    else ifneq (, $(filter $(STM32_MODEL), 412 427 429 437 439))
+    else ifneq (, $(filter $(STM32_MODEL), 412))
       RAM_LEN = 256K
     else ifneq (, $(filter $(STM32_MODEL), 413 423))
       RAM_LEN = 320K
     else ifneq (, $(filter $(STM32_MODEL), 415 417))
       RAM_LEN = 192K
+    else ifneq (, $(filter $(STM32_MODEL), 427 429 437 439))
+      RAM_LEN = 192K
     else ifneq (, $(filter $(STM32_MODEL), 469 479))
       RAM_LEN = 384K
     endif