Added port for Atmel AT91SAM7S-EK ARM7 board using the YAGARTO GNU ARM tool suite. Still testing.

bacnet-stack/ports/at91sam7s/isr.c

@@ -0,0 +1,87 @@
+//  **********************************************************************************************
+//
+//  File Name : isr.c
+//  Title     : interrupt enable/disable functions
+//
+//
+//  This module provides the interface routines for setting up and
+//  controlling the various interrupt modes present on the ARM processor.
+//  Copyright 2004, R O SoftWare
+//  No guarantees, warrantees, or promises, implied or otherwise.
+//  May be used for hobby or commercial purposes provided copyright
+//  notice remains intact.
+//
+//  Note from Jim Lynch:
+//  This module was developed by Bill Knight, RO Software and used with his permission.
+//  Taken from the Yahoo LPC2000 User's Group - Files Section 'UT050418A.ZIP'
+//  Specifically, the module armVIC.c with the include file references removed
+//  **********************************************************************************************
+
+#define IRQ_MASK 0x00000080
+#define FIQ_MASK 0x00000040
+#define INT_MASK (IRQ_MASK | FIQ_MASK)
+
+static inline unsigned __get_cpsr(void)
+{
+	unsigned long retval;
+	asm volatile (" mrs  %0, cpsr" : "=r" (retval) : /* no inputs */  );
+	return retval;
+}
+
+static inline void __set_cpsr(unsigned val)
+{
+	asm volatile (" msr  cpsr, %0" : /* no outputs */ : "r" (val)  );
+}
+
+unsigned disableIRQ(void)
+{
+	unsigned _cpsr;
+	_cpsr = __get_cpsr();
+	__set_cpsr(_cpsr | IRQ_MASK);
+	return _cpsr;
+}
+
+unsigned restoreIRQ(unsigned oldCPSR)
+{
+	unsigned _cpsr;
+
+	_cpsr = __get_cpsr();
+	__set_cpsr((_cpsr & ~IRQ_MASK) | (oldCPSR & IRQ_MASK));
+	return _cpsr;
+}
+
+unsigned enableIRQ(void)
+{
+	unsigned _cpsr;
+
+	_cpsr = __get_cpsr();
+	__set_cpsr(_cpsr & ~IRQ_MASK);
+	return _cpsr;
+}
+
+unsigned disableFIQ(void)
+{
+	unsigned _cpsr;
+
+	_cpsr = __get_cpsr();
+	__set_cpsr(_cpsr | FIQ_MASK);
+	return _cpsr;
+}
+
+unsigned restoreFIQ(unsigned oldCPSR)
+{
+	unsigned _cpsr;
+
+	_cpsr = __get_cpsr();
+	__set_cpsr((_cpsr & ~FIQ_MASK) | (oldCPSR & FIQ_MASK));
+	return _cpsr;
+}
+
+unsigned enableFIQ(void)
+{
+	unsigned _cpsr;
+
+	_cpsr = __get_cpsr();
+	__set_cpsr(_cpsr & ~FIQ_MASK);
+	return _cpsr;
+}