commit 0bae965fd8f696c831b790422fb18a3d41523c5d
author David Brown <david.brown@linaro.org> Thu Oct 19 16:45:09 2017 -0600
committer David Brown <davidb@davidb.org> Mon Oct 30 22:33:08 2017 -0600
tree 413fc57d96ac8c39acc10bbff3880f87844bf6da
parent ce4fa4400abbf2ba434048db514d9a717f97a42a

Zephyr: Use mbed TLS allocator

Instead of the overly-simplistic allocator in Zephyr, use the still
simplistic allocator in mbed TLS.

On K64f, this saves 848 bytes of text, 44 bytes of data, and 208 bytes
of bss.

Signed-off-by: David Brown <david.brown@linaro.org>

boot/zephyr/prj.conf

diff --git a/boot/zephyr/prj.conf b/boot/zephyr/prj.conf
index 27efab5..c60c590 100644
--- a/boot/zephyr/prj.conf
+++ b/boot/zephyr/prj.conf
@@ -8,8 +8,8 @@
 CONFIG_MBEDTLS_BUILTIN=y
 CONFIG_MBEDTLS_CFG_FILE="config-boot.h"
 
-### mbedTLS wants a heap
-CONFIG_HEAP_MEM_POOL_SIZE=16384
+### mbedTLS has its own heap
+# CONFIG_HEAP_MEM_POOL_SIZE is not set
 
 CONFIG_FLASH=y
 CONFIG_MPU_ALLOW_FLASH_WRITE=y