From 717143716602244037cb14359b02c14b0d75c464 Mon Sep 17 00:00:00 2001
From: Breno Matheus Lima <breno.lima@nxp.com>
Date: Thu, 18 Jul 2019 12:34:23 +0000
Subject: [PATCH] imx6: spl: Reduce SPL limit size in case CONFIG_SECURE_BOOT
 is enabled

In case CONFIG_SECURE_BOOT is enabled we need to limit the SPL size to
avoid a possible HAB failure event:

--------- HAB Event 1 -----------------
event data:
        0xdb 0x00 0x14 0x42 0x33 0x22 0x33 0x00
        0x00 0x00 0x00 0x0f 0x00 0x90 0x70 0x00
        0x00 0x01 0x10 0x00
STS = HAB_FAILURE (0x33)
RSN = HAB_INV_ADDRESS (0x22)
CTX = HAB_CTX_TARGET (0x33)
ENG = HAB_ENG_ANY (0x00)

As explained in Commit 23612534fe0f ("spl: imx6: Provide a SPL_SIZE_LIMIT
default") the i.MX6 SPL size limit is 68KB.

The ROM code is copying the image size defined in boot data to its
respective load address, in case we exceed the OCRAM free region a
HAB invalid address failure event is generated.

The maximum CSF size is defined in CONFIG_CSF_SIZE, reduce SPL size
limit based on this configuration.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
---
 tools/spl_size_limit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/spl_size_limit.c b/tools/spl_size_limit.c
index 98ff491867..8902e30129 100644
--- a/tools/spl_size_limit.c
+++ b/tools/spl_size_limit.c
@@ -14,6 +14,9 @@ int main(int argc, char *argv[])
 
 #ifdef CONFIG_SPL_SIZE_LIMIT
 	spl_size_limit = CONFIG_SPL_SIZE_LIMIT;
+#if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_CSF_SIZE)
+	spl_size_limit -= CONFIG_CSF_SIZE;
+#endif
 #ifdef CONFIG_SPL_SIZE_LIMIT_SUBTRACT_GD
 	spl_size_limit -= GENERATED_GBL_DATA_SIZE;
 #endif
-- 
2.39.5