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authorDavid Howells <dhowells@redhat.com>2012-03-28 18:30:02 +0100
committerDavid Howells <dhowells@redhat.com>2012-03-28 18:30:02 +0100
commit1c80f22f8d809a9a9024aad7a5bd093f078e77cf (patch)
tree116af9c3b675d888f63910adefe1557528726736 /arch/mn10300/include/asm
parentb81947c646bfefdf98e2fde5d7d39cbbda8525d4 (diff)
Disintegrate asm/system.h for MN10300
Disintegrate asm/system.h for MN10300. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-am33-list@redhat.com
Diffstat (limited to 'arch/mn10300/include/asm')
-rw-r--r--arch/mn10300/include/asm/atomic.h109
-rw-r--r--arch/mn10300/include/asm/barrier.h37
-rw-r--r--arch/mn10300/include/asm/cmpxchg.h115
-rw-r--r--arch/mn10300/include/asm/dma.h1
-rw-r--r--arch/mn10300/include/asm/exec.h16
-rw-r--r--arch/mn10300/include/asm/switch_to.h49
-rw-r--r--arch/mn10300/include/asm/system.h107
7 files changed, 225 insertions, 209 deletions
diff --git a/arch/mn10300/include/asm/atomic.h b/arch/mn10300/include/asm/atomic.h
index b9a8f8461262..975e1841ca64 100644
--- a/arch/mn10300/include/asm/atomic.h
+++ b/arch/mn10300/include/asm/atomic.h
@@ -12,112 +12,7 @@
#define _ASM_ATOMIC_H
#include <asm/irqflags.h>
-
-#ifndef __ASSEMBLY__
-
-#ifdef CONFIG_SMP
-#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT
-static inline
-unsigned long __xchg(volatile unsigned long *m, unsigned long val)
-{
- unsigned long status;
- unsigned long oldval;
-
- asm volatile(
- "1: mov %4,(_AAR,%3) \n"
- " mov (_ADR,%3),%1 \n"
- " mov %5,(_ADR,%3) \n"
- " mov (_ADR,%3),%0 \n" /* flush */
- " mov (_ASR,%3),%0 \n"
- " or %0,%0 \n"
- " bne 1b \n"
- : "=&r"(status), "=&r"(oldval), "=m"(*m)
- : "a"(ATOMIC_OPS_BASE_ADDR), "r"(m), "r"(val)
- : "memory", "cc");
-
- return oldval;
-}
-
-static inline unsigned long __cmpxchg(volatile unsigned long *m,
- unsigned long old, unsigned long new)
-{
- unsigned long status;
- unsigned long oldval;
-
- asm volatile(
- "1: mov %4,(_AAR,%3) \n"
- " mov (_ADR,%3),%1 \n"
- " cmp %5,%1 \n"
- " bne 2f \n"
- " mov %6,(_ADR,%3) \n"
- "2: mov (_ADR,%3),%0 \n" /* flush */
- " mov (_ASR,%3),%0 \n"
- " or %0,%0 \n"
- " bne 1b \n"
- : "=&r"(status), "=&r"(oldval), "=m"(*m)
- : "a"(ATOMIC_OPS_BASE_ADDR), "r"(m),
- "r"(old), "r"(new)
- : "memory", "cc");
-
- return oldval;
-}
-#else /* CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT */
-#error "No SMP atomic operation support!"
-#endif /* CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT */
-
-#else /* CONFIG_SMP */
-
-/*
- * Emulate xchg for non-SMP MN10300
- */
-struct __xchg_dummy { unsigned long a[100]; };
-#define __xg(x) ((struct __xchg_dummy *)(x))
-
-static inline
-unsigned long __xchg(volatile unsigned long *m, unsigned long val)
-{
- unsigned long oldval;
- unsigned long flags;
-
- flags = arch_local_cli_save();
- oldval = *m;
- *m = val;
- arch_local_irq_restore(flags);
- return oldval;
-}
-
-/*
- * Emulate cmpxchg for non-SMP MN10300
- */
-static inline unsigned long __cmpxchg(volatile unsigned long *m,
- unsigned long old, unsigned long new)
-{
- unsigned long oldval;
- unsigned long flags;
-
- flags = arch_local_cli_save();
- oldval = *m;
- if (oldval == old)
- *m = new;
- arch_local_irq_restore(flags);
- return oldval;
-}
-
-#endif /* CONFIG_SMP */
-
-#define xchg(ptr, v) \
- ((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr), \
- (unsigned long)(v)))
-
-#define cmpxchg(ptr, o, n) \
- ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \
- (unsigned long)(o), \
- (unsigned long)(n)))
-
-#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v)))
-#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
-
-#endif /* !__ASSEMBLY__ */
+#include <asm/cmpxchg.h>
#ifndef CONFIG_SMP
#include <asm-generic/atomic.h>
@@ -269,6 +164,8 @@ static inline void atomic_dec(atomic_t *v)
c; \
})
+#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v)))
+#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new)))
/**
* atomic_clear_mask - Atomically clear bits in memory
diff --git a/arch/mn10300/include/asm/barrier.h b/arch/mn10300/include/asm/barrier.h
new file mode 100644
index 000000000000..2bd97a5c8af7
--- /dev/null
+++ b/arch/mn10300/include/asm/barrier.h
@@ -0,0 +1,37 @@
+/* MN10300 memory barrier definitions
+ *
+ * Copyright (C) 2007 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_BARRIER_H
+#define _ASM_BARRIER_H
+
+#define nop() asm volatile ("nop")
+
+#define mb() asm volatile ("": : :"memory")
+#define rmb() mb()
+#define wmb() asm volatile ("": : :"memory")
+
+#ifdef CONFIG_SMP
+#define smp_mb() mb()
+#define smp_rmb() rmb()
+#define smp_wmb() wmb()
+#define set_mb(var, value) do { xchg(&var, value); } while (0)
+#else /* CONFIG_SMP */
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#endif /* CONFIG_SMP */
+
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+#define read_barrier_depends() do {} while (0)
+#define smp_read_barrier_depends() do {} while (0)
+
+#endif /* _ASM_BARRIER_H */
diff --git a/arch/mn10300/include/asm/cmpxchg.h b/arch/mn10300/include/asm/cmpxchg.h
new file mode 100644
index 000000000000..97a4aaf387a6
--- /dev/null
+++ b/arch/mn10300/include/asm/cmpxchg.h
@@ -0,0 +1,115 @@
+/* MN10300 Atomic xchg/cmpxchg operations
+ *
+ * Copyright (C) 2007 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_CMPXCHG_H
+#define _ASM_CMPXCHG_H
+
+#include <asm/irqflags.h>
+
+#ifdef CONFIG_SMP
+#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT
+static inline
+unsigned long __xchg(volatile unsigned long *m, unsigned long val)
+{
+ unsigned long status;
+ unsigned long oldval;
+
+ asm volatile(
+ "1: mov %4,(_AAR,%3) \n"
+ " mov (_ADR,%3),%1 \n"
+ " mov %5,(_ADR,%3) \n"
+ " mov (_ADR,%3),%0 \n" /* flush */
+ " mov (_ASR,%3),%0 \n"
+ " or %0,%0 \n"
+ " bne 1b \n"
+ : "=&r"(status), "=&r"(oldval), "=m"(*m)
+ : "a"(ATOMIC_OPS_BASE_ADDR), "r"(m), "r"(val)
+ : "memory", "cc");
+
+ return oldval;
+}
+
+static inline unsigned long __cmpxchg(volatile unsigned long *m,
+ unsigned long old, unsigned long new)
+{
+ unsigned long status;
+ unsigned long oldval;
+
+ asm volatile(
+ "1: mov %4,(_AAR,%3) \n"
+ " mov (_ADR,%3),%1 \n"
+ " cmp %5,%1 \n"
+ " bne 2f \n"
+ " mov %6,(_ADR,%3) \n"
+ "2: mov (_ADR,%3),%0 \n" /* flush */
+ " mov (_ASR,%3),%0 \n"
+ " or %0,%0 \n"
+ " bne 1b \n"
+ : "=&r"(status), "=&r"(oldval), "=m"(*m)
+ : "a"(ATOMIC_OPS_BASE_ADDR), "r"(m),
+ "r"(old), "r"(new)
+ : "memory", "cc");
+
+ return oldval;
+}
+#else /* CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT */
+#error "No SMP atomic operation support!"
+#endif /* CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT */
+
+#else /* CONFIG_SMP */
+
+/*
+ * Emulate xchg for non-SMP MN10300
+ */
+struct __xchg_dummy { unsigned long a[100]; };
+#define __xg(x) ((struct __xchg_dummy *)(x))
+
+static inline
+unsigned long __xchg(volatile unsigned long *m, unsigned long val)
+{
+ unsigned long oldval;
+ unsigned long flags;
+
+ flags = arch_local_cli_save();
+ oldval = *m;
+ *m = val;
+ arch_local_irq_restore(flags);
+ return oldval;
+}
+
+/*
+ * Emulate cmpxchg for non-SMP MN10300
+ */
+static inline unsigned long __cmpxchg(volatile unsigned long *m,
+ unsigned long old, unsigned long new)
+{
+ unsigned long oldval;
+ unsigned long flags;
+
+ flags = arch_local_cli_save();
+ oldval = *m;
+ if (oldval == old)
+ *m = new;
+ arch_local_irq_restore(flags);
+ return oldval;
+}
+
+#endif /* CONFIG_SMP */
+
+#define xchg(ptr, v) \
+ ((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr), \
+ (unsigned long)(v)))
+
+#define cmpxchg(ptr, o, n) \
+ ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \
+ (unsigned long)(o), \
+ (unsigned long)(n)))
+
+#endif /* _ASM_CMPXCHG_H */
diff --git a/arch/mn10300/include/asm/dma.h b/arch/mn10300/include/asm/dma.h
index 098df2e617ab..10b77d4628c2 100644
--- a/arch/mn10300/include/asm/dma.h
+++ b/arch/mn10300/include/asm/dma.h
@@ -11,7 +11,6 @@
#ifndef _ASM_DMA_H
#define _ASM_DMA_H
-#include <asm/system.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <linux/delay.h>
diff --git a/arch/mn10300/include/asm/exec.h b/arch/mn10300/include/asm/exec.h
new file mode 100644
index 000000000000..c74e367f4b9d
--- /dev/null
+++ b/arch/mn10300/include/asm/exec.h
@@ -0,0 +1,16 @@
+/* MN10300 process execution definitions
+ *
+ * Copyright (C) 2007 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_EXEC_H
+#define _ASM_EXEC_H
+
+#define arch_align_stack(x) (x)
+
+#endif /* _ASM_EXEC_H */
diff --git a/arch/mn10300/include/asm/switch_to.h b/arch/mn10300/include/asm/switch_to.h
new file mode 100644
index 000000000000..393d311735c8
--- /dev/null
+++ b/arch/mn10300/include/asm/switch_to.h
@@ -0,0 +1,49 @@
+/* MN10300 task switching definitions
+ *
+ * Copyright (C) 2007 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 Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef _ASM_SWITCH_TO_H
+#define _ASM_SWITCH_TO_H
+
+#include <asm/barrier.h>
+
+struct task_struct;
+struct thread_struct;
+
+#if !defined(CONFIG_LAZY_SAVE_FPU)
+struct fpu_state_struct;
+extern asmlinkage void fpu_save(struct fpu_state_struct *);
+#define switch_fpu(prev, next) \
+ do { \
+ if ((prev)->thread.fpu_flags & THREAD_HAS_FPU) { \
+ (prev)->thread.fpu_flags &= ~THREAD_HAS_FPU; \
+ (prev)->thread.uregs->epsw &= ~EPSW_FE; \
+ fpu_save(&(prev)->thread.fpu_state); \
+ } \
+ } while (0)
+#else
+#define switch_fpu(prev, next) do {} while (0)
+#endif
+
+/* context switching is now performed out-of-line in switch_to.S */
+extern asmlinkage
+struct task_struct *__switch_to(struct thread_struct *prev,
+ struct thread_struct *next,
+ struct task_struct *prev_task);
+
+#define switch_to(prev, next, last) \
+do { \
+ switch_fpu(prev, next); \
+ current->thread.wchan = (u_long) __builtin_return_address(0); \
+ (last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \
+ mb(); \
+ current->thread.wchan = 0; \
+} while (0)
+
+#endif /* _ASM_SWITCH_TO_H */
diff --git a/arch/mn10300/include/asm/system.h b/arch/mn10300/include/asm/system.h
index 94b4c5e1491b..a7f40578587c 100644
--- a/arch/mn10300/include/asm/system.h
+++ b/arch/mn10300/include/asm/system.h
@@ -1,102 +1,5 @@
-/* MN10300 System definitions
- *
- * Copyright (C) 2007 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 Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_SYSTEM_H
-#define _ASM_SYSTEM_H
-
-#include <asm/cpu-regs.h>
-#include <asm/intctl-regs.h>
-
-#ifdef __KERNEL__
-#ifndef __ASSEMBLY__
-
-#include <linux/kernel.h>
-#include <linux/irqflags.h>
-#include <linux/atomic.h>
-
-#if !defined(CONFIG_LAZY_SAVE_FPU)
-struct fpu_state_struct;
-extern asmlinkage void fpu_save(struct fpu_state_struct *);
-#define switch_fpu(prev, next) \
- do { \
- if ((prev)->thread.fpu_flags & THREAD_HAS_FPU) { \
- (prev)->thread.fpu_flags &= ~THREAD_HAS_FPU; \
- (prev)->thread.uregs->epsw &= ~EPSW_FE; \
- fpu_save(&(prev)->thread.fpu_state); \
- } \
- } while (0)
-#else
-#define switch_fpu(prev, next) do {} while (0)
-#endif
-
-struct task_struct;
-struct thread_struct;
-
-extern asmlinkage
-struct task_struct *__switch_to(struct thread_struct *prev,
- struct thread_struct *next,
- struct task_struct *prev_task);
-
-/* context switching is now performed out-of-line in switch_to.S */
-#define switch_to(prev, next, last) \
-do { \
- switch_fpu(prev, next); \
- current->thread.wchan = (u_long) __builtin_return_address(0); \
- (last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \
- mb(); \
- current->thread.wchan = 0; \
-} while (0)
-
-#define arch_align_stack(x) (x)
-
-#define nop() asm volatile ("nop")
-
-/*
- * Force strict CPU ordering.
- * And yes, this is required on UP too when we're talking
- * to devices.
- *
- * For now, "wmb()" doesn't actually do anything, as all
- * Intel CPU's follow what Intel calls a *Processor Order*,
- * in which all writes are seen in the program order even
- * outside the CPU.
- *
- * I expect future Intel CPU's to have a weaker ordering,
- * but I'd also expect them to finally get their act together
- * and add some real memory barriers if so.
- *
- * Some non intel clones support out of order store. wmb() ceases to be a
- * nop for these.
- */
-
-#define mb() asm volatile ("": : :"memory")
-#define rmb() mb()
-#define wmb() asm volatile ("": : :"memory")
-
-#ifdef CONFIG_SMP
-#define smp_mb() mb()
-#define smp_rmb() rmb()
-#define smp_wmb() wmb()
-#define set_mb(var, value) do { xchg(&var, value); } while (0)
-#else /* CONFIG_SMP */
-#define smp_mb() barrier()
-#define smp_rmb() barrier()
-#define smp_wmb() barrier()
-#define set_mb(var, value) do { var = value; mb(); } while (0)
-#endif /* CONFIG_SMP */
-
-#define set_wmb(var, value) do { var = value; wmb(); } while (0)
-
-#define read_barrier_depends() do {} while (0)
-#define smp_read_barrier_depends() do {} while (0)
-
-#endif /* !__ASSEMBLY__ */
-#endif /* __KERNEL__ */
-#endif /* _ASM_SYSTEM_H */
+/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */
+#include <asm/barrier.h>
+#include <asm/cmpxchg.h>
+#include <asm/exec.h>
+#include <asm/switch_to.h>