commit 59c1c2bf94100d54bafabfdf5740a4474f2f8970
author Chungying Lu <chungying.lu@mediatek.corp-partner.google.com> Tue Apr 25 15:39:10 2023 +0800
committer developer <developer@mediatek.com> Tue Jun 06 13:45:40 2023 +0800
tree 5c31e28136fb3567b1dde66361d283ce9090378e
parent 03facb03a7f88a6a2960f9b9261af3f667ae52d3

feat(mt8188): add emi mpu protection for APU secure memory

Add emi mpu protection of APU secure memory.

Change-Id: I949cfce97565d8a313caae4ea41af60a171042a6

plat/mediatek/drivers/emi_mpu/mt8188/emi_mpu.c

diff --git a/plat/mediatek/drivers/emi_mpu/mt8188/emi_mpu.c b/plat/mediatek/drivers/emi_mpu/mt8188/emi_mpu.c
index 558533d..59ab315 100644
--- a/plat/mediatek/drivers/emi_mpu/mt8188/emi_mpu.c
+++ b/plat/mediatek/drivers/emi_mpu/mt8188/emi_mpu.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,3 +12,20 @@
 	/* TODO: set emi mpu region */
 	INFO("%s, emi mpu is not setting currently\n", __func__);
 }
+
+int set_apu_emi_mpu_region(void)
+{
+	struct emi_region_info_t region_info;
+
+	region_info.start = (unsigned long long)APUSYS_SEC_BUF_PA;
+	region_info.end = (unsigned long long)(APUSYS_SEC_BUF_PA + APUSYS_SEC_BUF_SZ) - 1;
+	region_info.region = APUSYS_SEC_BUF_EMI_REGION;
+
+	SET_ACCESS_PERMISSION(region_info.apc, UNLOCK,
+			      FORBIDDEN,     FORBIDDEN, FORBIDDEN,     FORBIDDEN,
+			      FORBIDDEN,     FORBIDDEN, FORBIDDEN,     FORBIDDEN,
+			      NO_PROTECTION, FORBIDDEN, NO_PROTECTION, FORBIDDEN,
+			      FORBIDDEN,     FORBIDDEN, FORBIDDEN,     SEC_RW);
+
+	return emi_mpu_set_protection(&region_info);
+}