1 files changed, 161 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/system.h b/arch/unicore32/include/asm/system.h
new file mode 100644
index 000000000000..246b71c17fda
--- /dev/null
+++ b/arch/unicore32/include/asm/system.h
@@ -0,0 +1,161 @@
+/*
+ * linux/arch/unicore32/include/asm/system.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_SYSTEM_H__
+#define __UNICORE_SYSTEM_H__
+
+#ifdef __KERNEL__
+
+/*
+ * CR1 bits (CP#0 CR1)
+ */
+#define CR_M	(1 << 0)	/* MMU enable				*/
+#define CR_A	(1 << 1)	/* Alignment abort enable		*/
+#define CR_D	(1 << 2)	/* Dcache enable			*/
+#define CR_I	(1 << 3)	/* Icache enable			*/
+#define CR_B	(1 << 4)	/* Dcache write mechanism: write back	*/
+#define CR_T	(1 << 5)	/* Burst enable				*/
+#define CR_V	(1 << 13)	/* Vectors relocated to 0xffff0000	*/
+
+#ifndef __ASSEMBLY__
+
+#include <linux/linkage.h>
+#include <linux/irqflags.h>
+
+struct thread_info;
+struct task_struct;
+
+struct pt_regs;
+
+void die(const char *msg, struct pt_regs *regs, int err);
+
+struct siginfo;
+void uc32_notify_die(const char *str, struct pt_regs *regs,
+		struct siginfo *info, unsigned long err, unsigned long trap);
+
+void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
+				       struct pt_regs *),
+		     int sig, int code, const char *name);
+
+#define xchg(ptr, x) \
+	((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
+
+extern asmlinkage void __backtrace(void);
+extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
+
+struct mm_struct;
+extern void show_pte(struct mm_struct *mm, unsigned long addr);
+extern void __show_regs(struct pt_regs *);
+
+extern int cpu_architecture(void);
+extern void cpu_init(void);
+
+#define vectors_high()	(cr_alignment & CR_V)
+
+#define isb() __asm__ __volatile__ ("" : : : "memory")
+#define dsb() __asm__ __volatile__ ("" : : : "memory")
+#define dmb() __asm__ __volatile__ ("" : : : "memory")
+
+#define mb()		barrier()
+#define rmb()		barrier()
+#define wmb()		barrier()
+#define smp_mb()	barrier()
+#define smp_rmb()	barrier()
+#define smp_wmb()	barrier()
+#define read_barrier_depends()		do { } while (0)
+#define smp_read_barrier_depends()	do { } while (0)
+
+#define set_mb(var, value)	do { var = value; smp_mb(); } while (0)
+#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
+
+extern unsigned long cr_no_alignment;	/* defined in entry-unicore.S */
+extern unsigned long cr_alignment;	/* defined in entry-unicore.S */
+
+static inline unsigned int get_cr(void)
+{
+	unsigned int val;
+	asm("movc %0, p0.c1, #0" : "=r" (val) : : "cc");
+	return val;
+}
+
+static inline void set_cr(unsigned int val)
+{
+	asm volatile("movc p0.c1, %0, #0	@set CR"
+	  : : "r" (val) : "cc");
+	isb();
+}
+
+extern void adjust_cr(unsigned long mask, unsigned long set);
+
+/*
+ * switch_to(prev, next) should switch from task `prev' to `next'
+ * `prev' will never be the same as `next'.  schedule() itself
+ * contains the memory barrier to tell GCC not to cache `current'.
+ */
+extern struct task_struct *__switch_to(struct task_struct *,
+		struct thread_info *, struct thread_info *);
+extern void panic(const char *fmt, ...);
+
+#define switch_to(prev, next, last)					\
+do {									\
+	last = __switch_to(prev,					\
+		task_thread_info(prev), task_thread_info(next));	\
+} while (0)
+
+static inline unsigned long
+__xchg(unsigned long x, volatile void *ptr, int size)
+{
+	unsigned long ret;
+
+	switch (size) {
+	case 1:
+		asm volatile("@	__xchg1\n"
+		"	swapb	%0, %1, [%2]"
+			: "=&r" (ret)
+			: "r" (x), "r" (ptr)
+			: "memory", "cc");
+		break;
+	case 4:
+		asm volatile("@	__xchg4\n"
+		"	swapw	%0, %1, [%2]"
+			: "=&r" (ret)
+			: "r" (x), "r" (ptr)
+			: "memory", "cc");
+		break;
+	default:
+		panic("xchg: bad data size: ptr 0x%p, size %d\n",
+			ptr, size);
+	}
+
+	return ret;
+}
+
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n)					\
+		((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr),	\
+		(unsigned long)(o), (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n)					\
+		__cmpxchg64_local_generic((ptr), (o), (n))
+
+#include <asm-generic/cmpxchg.h>
+
+#endif /* __ASSEMBLY__ */
+
+#define arch_align_stack(x) (x)
+
+#endif /* __KERNEL__ */
+
+#endif