From 203722136c5f50d7deab432739e991faa48e470f Mon Sep 17 00:00:00 2001
From: Maurus Cuelenaere <mcuelenaere@gmail.com>
Date: Thu, 4 Dec 2008 21:06:52 +0000
Subject: Implement in_interrupt_mode() properly

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19334 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/mips/ingenic_jz47xx/system-jz4740.c | 19 ++++---------------
 firmware/target/mips/ingenic_jz47xx/system-target.h |  6 +++++-
 2 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
index f733582d70..bde8e1df6a 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/system-jz4740.c
@@ -27,6 +27,7 @@
 #include "system-target.h"
 #include <string.h>
 #include "kernel.h"
+#include "system.h"
 
 #define NUM_DMA  6
 #define NUM_GPIO 128
@@ -322,26 +323,15 @@ static int get_irq_number(void)
     return irq;
 }
 
-static bool intr_mode = false;
-
-bool in_interrupt_mode(void)
-{
-    return intr_mode;
-}
-
 void intr_handler(void)
 {
-    int irq = get_irq_number();
-    if(irq < 0)
+    irq = get_irq_number(); /* irq is defined static at UIRQ() */
+    if(UNLIKELY(irq < 0))
         return;
     
     ack_irq(irq);
-    if(irq > 0)
-    {
-        intr_mode = true;
+    if(LIKELY(irq > 0))
         irqvector[irq-1]();
-        intr_mode = false;
-    }
 }
 
 #define EXC(x,y) if(_cause == (x)) return (y);
@@ -378,7 +368,6 @@ void exception_handler(void* stack_ptr, unsigned int cause, unsigned int epc)
 
 static const int FR2n[] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32};
 static unsigned int iclk;
- 
 static void detect_clock(void)
 {
     unsigned int cfcr, pllout;
diff --git a/firmware/target/mips/ingenic_jz47xx/system-target.h b/firmware/target/mips/ingenic_jz47xx/system-target.h
index a8133140fa..eab517fa5d 100644
--- a/firmware/target/mips/ingenic_jz47xx/system-target.h
+++ b/firmware/target/mips/ingenic_jz47xx/system-target.h
@@ -56,6 +56,11 @@ static inline void disable_interrupt(void)
     clear_c0_status(ST0_IE);
 }
 
+static inline bool in_interrupt_mode(void)
+{
+    return (read_c0_status() & ST0_IE) ? true : false;
+}
+
 #define disable_irq() \
     disable_interrupt()
 
@@ -101,7 +106,6 @@ void udelay(unsigned int usec);
 void mdelay(unsigned int msec);
 void power_off(void);
 void system_reboot(void);
-bool in_interrupt_mode(void);
 
 #define DMA_LCD_CHANNEL    0
 #define DMA_NAND_CHANNEL   1
-- 
cgit