From ff7f9cb5b52facc48ed61eecc47cde000c6ea692 Mon Sep 17 00:00:00 2001
From: "qinglin.li" <qinglin.li@amlogic.com>
Date: Tue, 1 Aug 2023 17:47:57 +0800
Subject: [PATCH] dmc_monitor: arm need check memory map [1/1]

PD#SWPL-132402

Problem:
read no map memory failed when arm build

Solution:
check memory map when arm build

Verify:
local

Change-Id: Ie9a0359168e3ed620a8bb2a5b7a3ef3e85d983bc
Signed-off-by: qinglin.li <qinglin.li@amlogic.com>
---
 arch/arm/include/asm/page.h |  3 +++
 arch/arm/mm/init.c          | 13 +++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
index 11b058a72a5b..cb9c058399d1 100644
--- a/arch/arm/include/asm/page.h
+++ b/arch/arm/include/asm/page.h
@@ -155,6 +155,9 @@ typedef struct page *pgtable_t;
 
 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
 extern int pfn_valid(unsigned long);
+#if IS_ENABLED(CONFIG_AMLOGIC_DMC_MONITOR_BREAK_GKI)
+extern int pfn_is_map_memory(unsigned long pfn);
+#endif
 #endif
 
 #include <asm/memory.h>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 6d04cb75d26b..0f16cece0fc0 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -147,6 +147,19 @@ int pfn_valid(unsigned long pfn)
 	return 0;
 }
 EXPORT_SYMBOL(pfn_valid);
+
+#if IS_ENABLED(CONFIG_AMLOGIC_DMC_MONITOR_BREAK_GKI)
+int pfn_is_map_memory(unsigned long pfn)
+{
+	phys_addr_t addr = __pfn_to_phys(pfn);
+
+	if (pfn_valid(pfn))
+		return memblock_is_map_memory(addr);
+
+	return 0;
+}
+EXPORT_SYMBOL(pfn_is_map_memory);
+#endif
 #endif
 
 static bool arm_memblock_steal_permitted = true;