From d7d50cc81f72d1275140d7a15c52b6f9e272896f Mon Sep 17 00:00:00 2001
From: Josh Rahm <joshuarahm@gmail.com>
Date: Wed, 25 Nov 2020 11:27:45 -0700
Subject: Add module for controlling the MPU.

The MPU is a module in arm chips which allow for memory access
protection. They are more primitive than full MMUs, but can still
provide at least basic access control between different process
controls.
---
 include/arch/arm/arch.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'include/arch/arm/arch.h')

diff --git a/include/arch/arm/arch.h b/include/arch/arm/arch.h
index bf96fae..e4ebb8d 100644
--- a/include/arch/arm/arch.h
+++ b/include/arch/arm/arch.h
@@ -13,6 +13,12 @@
 #define disable_all_interrupts() \
   asm volatile(" cpsid i ")
 
+#define __isb() \
+  asm volatile(" isb ")
+
+#define __dsb() \
+  asm volatile(" dsb ")
+
 
 #define DMA1_BASE (0x40020000)
 #define DMA2_BASE (0x40020400)
@@ -36,6 +42,7 @@
 #define SPI3_BASE (0x40003C00)
 
 #define STACK_TOP (0x2000c000)
+#define MPU_BASE (0xE000ED90)
 
 #include <stdint.h>
 #ifndef DRY_RUN
-- 
cgit