ArmPkg/ArmMmuLib: Add new attribute WRITE_BACK_NONSHAREABLE

[mirror_edk2.git] / ArmPkg / Include / Library / ArmLib.h

diff --git a/ArmPkg/Include/Library/ArmLib.h b/ArmPkg/Include/Library/ArmLib.h
index 24ffe9f1aaa7d5c54bc585ec9ddde5269f3dd40e..24e84c7a19658df8fd9941813931b39432c28e5d 100644 (file)
--- a/ArmPkg/Include/Library/ArmLib.h
+++ b/ArmPkg/Include/Library/ArmLib.h
@@ -41,6 +41,14 @@ typedef enum {
   ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_UNCACHED_UNBUFFERED,\r
   ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK,\r
   ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK,\r
+\r
+  // On some platforms, memory mapped flash region is designed as not supporting\r
+  // shareable attribute, so WRITE_BACK_NONSHAREABLE is added for such special\r
+  // need.\r
+  // Do NOT use below two attributes if you are not sure.\r
+  ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK_NONSHAREABLE,\r
+  ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_BACK_NONSHAREABLE,\r
+\r
   ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH,\r
   ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_WRITE_THROUGH,\r
   ARM_MEMORY_REGION_ATTRIBUTE_DEVICE,\r