From 7dfef5e22ebe3339736f3622b03fa7a45ebea591 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 31 Jul 2013 09:11:24 -0600
Subject: [PATCH] SAMA5: Modification of some CPSR-related inline functions

---
 arch/arm/include/armv7-a/irq.h     | 35 +++++++++++++++---------------
 configs/sama5d3x-ek/README.txt     | 17 +++++++++++++++
 configs/sama5d3x-ek/src/nor_main.c |  4 ++--
 3 files changed, 36 insertions(+), 20 deletions(-)

diff --git a/arch/arm/include/armv7-a/irq.h b/arch/arm/include/armv7-a/irq.h
index 51a9702ae8..09880f4507 100755
--- a/arch/arm/include/armv7-a/irq.h
+++ b/arch/arm/include/armv7-a/irq.h
@@ -250,6 +250,23 @@ struct xcptcontext
 
 #ifndef __ASSEMBLY__
 
+/* Return the current IRQ state */
+
+static inline irqstate_t irqstate(void)
+{
+  unsigned int cpsr;
+
+  __asm__ __volatile__
+    (
+      "\tmrs    %0, cpsr\n"
+      : "=r" (cpsr)
+      :
+      : "memory"
+    );
+
+  return cpsr;
+}
+
 /* Disable IRQs and return the previous IRQ state */
 
 static inline irqstate_t irqsave(void)
@@ -286,24 +303,6 @@ static inline irqstate_t irqenable(void)
   return cpsr;
 }
 
-/* Disable IRQs and return the previous IRQ state */
-
-static inline irqstate_t irqdisable(void)
-{
-  unsigned int cpsr;
-
-  __asm__ __volatile__
-    (
-      "\tmrs    %0, cpsr\n"
-      "\tcpsid  i\n"
-      : "=r" (cpsr)
-      :
-      : "memory"
-    );
-
-  return cpsr;
-}
-
 /* Restore saved IRQ & FIQ state */
 
 static inline void irqrestore(irqstate_t flags)
diff --git a/configs/sama5d3x-ek/README.txt b/configs/sama5d3x-ek/README.txt
index 4300fd86a5..66a7e760b2 100644
--- a/configs/sama5d3x-ek/README.txt
+++ b/configs/sama5d3x-ek/README.txt
@@ -759,3 +759,20 @@ Configurations
         FLASH by closing the BMS jumper (J9).  As far as I can tell, this
         jumper does nothing on my board???  I have been using the norboot
         configuration to start the program in NOR FLASH (see just above).
+        I do that as follows:
+
+        1. I build the norboot configuration and rename nuttx to norboot
+        2. I build the the ostest configuration and write it to NOR FLASH
+           using SAM-BA
+        3. Then I start the J-Link GDB server and GDB.  In GDB, I do the
+           following:
+
+           (gdb) mon reset                # Reset and halt the CPU
+           (gdb) load norboot             # Load norboot into internal SRAM
+           (gdb) mon go                   # Start norboot
+           (gdb) mon halt                 # Break in
+           (gdb) mon reg pc = 0x10000040  # Set the PC to NOR flash entry point
+           (gdb) mon go                   # And jump into NOR flash
+
+       2013-7-31:
+         The OS test configuration is functional.
diff --git a/configs/sama5d3x-ek/src/nor_main.c b/configs/sama5d3x-ek/src/nor_main.c
index 117f71c9e2..472086d9eb 100644
--- a/configs/sama5d3x-ek/src/nor_main.c
+++ b/configs/sama5d3x-ek/src/nor_main.c
@@ -122,12 +122,12 @@ int nor_main(int argc, char *argv)
   putreg32(regval, SAM_HSMC_MODE(HSMC_CS0));
 
   /* Interrupts must be disabled through the following.  In this configuration,
-   * there should only be timer interupts.  Your NuttX configuration must use
+   * there should only be timer interrupts.  Your NuttX configuration must use
    * CONFIG_SERIAL_LOWCONSOLE=y or printf() will hang when the interrupts
    * are disabled!
    */
 
-  (void)irqdisable();
+  (void)irqsave();
 
   /* Disable MATRIX write protection */