From 15f19c32ac76f36f2178bf7253650ce1a414372b Mon Sep 17 00:00:00 2001
From: Ville Juven <ville.juven@unikie.com>
Date: Thu, 1 Feb 2024 14:59:10 +0200
Subject: [PATCH] arch/addrenv: Add utility function to wipe one page

up_addrenv_page_wipe can be used to wipe a single page of memory.
---
 arch/risc-v/src/common/riscv_addrenv_pgmap.c | 20 +++++++++++++++++++
 include/nuttx/arch.h                         | 21 +++++++++++++++++++-
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/arch/risc-v/src/common/riscv_addrenv_pgmap.c b/arch/risc-v/src/common/riscv_addrenv_pgmap.c
index da9e250e76..0d36c1adeb 100644
--- a/arch/risc-v/src/common/riscv_addrenv_pgmap.c
+++ b/arch/risc-v/src/common/riscv_addrenv_pgmap.c
@@ -147,6 +147,26 @@ bool up_addrenv_user_vaddr(uintptr_t vaddr)
   return riscv_uservaddr(vaddr);
 }
 
+/****************************************************************************
+ * Name: up_addrenv_page_wipe
+ *
+ * Description:
+ *   Wipe a page of physical memory, first mapping it into kernel virtual
+ *   memory.
+ *
+ * Input Parameters:
+ *   page - The page physical address.
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+void up_addrenv_page_wipe(uintptr_t page)
+{
+  riscv_pgwipe(page);
+}
+
 #ifdef CONFIG_MM_KMAP
 
 /****************************************************************************
diff --git a/include/nuttx/arch.h b/include/nuttx/arch.h
index 2aee23fc8c..785b113b94 100644
--- a/include/nuttx/arch.h
+++ b/include/nuttx/arch.h
@@ -1378,7 +1378,7 @@ uintptr_t up_addrenv_page_vaddr(uintptr_t page);
  *   vaddr - The virtual address.
  *
  * Returned Value:
- *   True if it is; false if it's not
+ *   True if it is; false if it's not.
  *
  ****************************************************************************/
 
@@ -1386,6 +1386,25 @@ uintptr_t up_addrenv_page_vaddr(uintptr_t page);
 bool up_addrenv_user_vaddr(uintptr_t vaddr);
 #endif
 
+/****************************************************************************
+ * Name: up_addrenv_page_wipe
+ *
+ * Description:
+ *   Wipe a page of physical memory, first mapping it into kernel virtual
+ *   memory.
+ *
+ * Input Parameters:
+ *   page - The page physical address.
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_ADDRENV
+void up_addrenv_page_wipe(uintptr_t page);
+#endif
+
 /****************************************************************************
  * Name: up_addrenv_kmap_init
  *