aboutsummaryrefslogtreecommitdiff
path: root/include/asm-frv/system.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-frv/system.h')
-rw-r--r--include/asm-frv/system.h128
1 files changed, 128 insertions, 0 deletions
diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h
new file mode 100644
index 00000000000..d2aea70a5f6
--- /dev/null
+++ b/include/asm-frv/system.h
@@ -0,0 +1,128 @@
+/* system.h: FR-V CPU control definitions
+ *
+ * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_SYSTEM_H
+#define _ASM_SYSTEM_H
+
+#include <linux/config.h> /* get configuration macros */
+#include <linux/linkage.h>
+#include <asm/atomic.h>
+
+struct thread_struct;
+
+#define prepare_to_switch() do { } while(0)
+
+/*
+ * switch_to(prev, next) should switch from task `prev' to `next'
+ * `prev' will never be the same as `next'.
+ * The `mb' is to tell GCC not to cache `current' across this call.
+ */
+extern asmlinkage
+struct task_struct *__switch_to(struct thread_struct *prev_thread,
+ struct thread_struct *next_thread,
+ struct task_struct *prev);
+
+#define switch_to(prev, next, last) \
+do { \
+ (prev)->thread.sched_lr = \
+ (unsigned long) __builtin_return_address(0); \
+ (last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \
+ mb(); \
+} while(0)
+
+/*
+ * interrupt flag manipulation
+ */
+#define local_irq_disable() \
+do { \
+ unsigned long psr; \
+ asm volatile(" movsg psr,%0 \n" \
+ " andi %0,%2,%0 \n" \
+ " ori %0,%1,%0 \n" \
+ " movgs %0,psr \n" \
+ : "=r"(psr) \
+ : "i" (PSR_PIL_14), "i" (~PSR_PIL) \
+ : "memory"); \
+} while(0)
+
+#define local_irq_enable() \
+do { \
+ unsigned long psr; \
+ asm volatile(" movsg psr,%0 \n" \
+ " andi %0,%1,%0 \n" \
+ " movgs %0,psr \n" \
+ : "=r"(psr) \
+ : "i" (~PSR_PIL) \
+ : "memory"); \
+} while(0)
+
+#define local_save_flags(flags) \
+do { \
+ typecheck(unsigned long, flags); \
+ asm("movsg psr,%0" \
+ : "=r"(flags) \
+ : \
+ : "memory"); \
+} while(0)
+
+#define local_irq_save(flags) \
+do { \
+ unsigned long npsr; \
+ typecheck(unsigned long, flags); \
+ asm volatile(" movsg psr,%0 \n" \
+ " andi %0,%3,%1 \n" \
+ " ori %1,%2,%1 \n" \
+ " movgs %1,psr \n" \
+ : "=r"(flags), "=r"(npsr) \
+ : "i" (PSR_PIL_14), "i" (~PSR_PIL) \
+ : "memory"); \
+} while(0)
+
+#define local_irq_restore(flags) \
+do { \
+ typecheck(unsigned long, flags); \
+ asm volatile(" movgs %0,psr \n" \
+ : \
+ : "r" (flags) \
+ : "memory"); \
+} while(0)
+
+#define irqs_disabled() \
+ ((__get_PSR() & PSR_PIL) >= PSR_PIL_14)
+
+/*
+ * Force strict CPU ordering.
+ */
+#define nop() asm volatile ("nop"::)
+#define mb() asm volatile ("membar" : : :"memory")
+#define rmb() asm volatile ("membar" : : :"memory")
+#define wmb() asm volatile ("membar" : : :"memory")
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+#define smp_mb() mb()
+#define smp_rmb() rmb()
+#define smp_wmb() wmb()
+
+#define read_barrier_depends() do {} while(0)
+#define smp_read_barrier_depends() read_barrier_depends()
+
+#define HARD_RESET_NOW() \
+do { \
+ cli(); \
+} while(1)
+
+extern void die_if_kernel(const char *, ...) __attribute__((format(printf, 1, 2)));
+extern void free_initmem(void);
+
+#define arch_align_stack(x) (x)
+
+#endif /* _ASM_SYSTEM_H */