patch-2.3.16 linux/include/asm-ppc/irq_control.h

• Lines: 85
• Date: Tue Aug 31 11:36:43 1999
• Orig file: v2.3.15/linux/include/asm-ppc/irq_control.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.15/linux/include/asm-ppc/irq_control.h linux/include/asm-ppc/irq_control.h
@@ -0,0 +1,84 @@
+/*
+ * $Id: irq_control.h,v 1.2 1999/07/17 20:23:58 cort Exp $
+ *
+ * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
+ */
+#ifndef _PPC_IRQ_CONTROL_H
+#define _PPC_IRQ_CONTROL_H
+
+#include <linux/config.h>
+
+#include <asm/irq.h>
+#include <asm/atomic.h>
+
+extern void do_lost_interrupts(unsigned long);
+extern atomic_t ppc_n_lost_interrupts;
+
+#define __no_use_save_flags(flags) \
+	({__asm__ __volatile__ ("mfmsr %0" : "=r" ((flags)) : : "memory"); })
+
+extern __inline__ void __no_use_restore_flags(unsigned long flags)
+{
+        if ((flags & MSR_EE) && atomic_read(&ppc_n_lost_interrupts) != 0) {
+                do_lost_interrupts(flags);
+        } else {
+                __asm__ __volatile__ ("sync; mtmsr %0; isync"
+                              : : "r" (flags) : "memory");
+        }
+}
+
+extern __inline__ void __no_use_sti(void)
+{
+	unsigned long flags;
+
+	__asm__ __volatile__ ("mfmsr %0": "=r" (flags));
+	flags |= MSR_EE;
+	if ( atomic_read(&ppc_n_lost_interrupts) )
+		do_lost_interrupts(flags);
+	__asm__ __volatile__ ("sync; mtmsr %0; isync":: "r" (flags));
+}
+
+extern __inline__ void __no_use_cli(void)
+{
+	unsigned long flags;
+	__asm__ __volatile__ ("mfmsr %0": "=r" (flags));
+	flags &= ~MSR_EE;
+	__asm__ __volatile__ ("sync; mtmsr %0; isync":: "r" (flags));
+}
+
+#define __no_use_mask_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->disable) irq_desc[irq].ctl->disable(irq);})
+#define __no_use_unmask_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->enable) irq_desc[irq].ctl->enable(irq);})
+#define __no_use_mask_and_ack_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->mask_and_ack) irq_desc[irq].ctl->mask_and_ack(irq);})
+
+#ifdef CONFIG_RTL
+
+/* the rtl system provides these -- Cort */
+extern void __sti(void);
+extern void __cli(void);
+extern void __restore_flags(unsigned int);
+extern unsigned int __return_flags(void);
+#define __save_flags(flags) (flags = __return_flags())
+
+#define rtl_hard_cli __no_use_cli
+#define rtl_hard_sti __no_use_sti
+#define rtl_hard_save_flags(flags) __no_use_save_flags(flags)
+#define rtl_hard_restore_flags(flags) __no_use_restore_flags(flags)
+
+#define rtl_hard_mask_irq(irq) __no_use_mask_irq(irq)
+#define rtl_hard_unmask_irq(irq) __no_use_unmask_irq(irq)
+#define rtl_hard_mask_and_ack_irq(irq) __no_use_mask_and_ack_irq(irq)
+
+#else /* CONFIG_RTL */
+
+#define __cli __no_use_cli
+#define __sti __no_use_sti
+#define __save_flags(flags) __no_use_save_flags(flags)
+#define __restore_flags(flags) __no_use_restore_flags(flags)
+
+#define mask_irq(irq) __no_use_mask_irq(irq)
+#define unmask_irq(irq) __no_use_unmask_irq(irq)
+#define mask_and_ack_irq(irq) __no_use_mask_and_ack_irq(irq)
+
+#endif /* CONFIG_RTL */
+
+#endif /* _PPC_IRQ_CONTROL_H */