108 lines
2.1 KiB
C
108 lines
2.1 KiB
C
/*
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* U-boot - system.h
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*
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* Copyright (c) 2005-2007 Analog Devices Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _BLACKFIN_SYSTEM_H
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#define _BLACKFIN_SYSTEM_H
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/*
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* Interrupt configuring macros.
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*/
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extern int irq_flags;
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#define local_irq_enable() \
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__asm__ __volatile__ ( \
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"sti %0;" \
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: \
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: "d" (irq_flags) \
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)
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#define local_irq_disable() \
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do { \
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int __tmp_dummy; \
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__asm__ __volatile__ ( \
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"cli %0;" \
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: "=d" (__tmp_dummy) \
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); \
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} while (0)
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# define local_irq_save(x) \
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__asm__ __volatile__ ( \
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"cli %0;" \
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: "=&d" (x) \
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)
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#define local_save_flags(x) \
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__asm__ __volatile__ ( \
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"cli %0;" \
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"sti %0;" \
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: "=d" (x) \
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)
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#define irqs_enabled_from_flags(x) ((x) != 0x1f)
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#define local_irq_restore(x) \
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do { \
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if (irqs_enabled_from_flags(x)) \
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local_irq_enable(); \
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} while (0)
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/*
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* Force strict CPU ordering.
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*/
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#define nop() asm volatile ("nop;\n\t"::)
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#define mb() asm volatile ("" : : :"memory")
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#define rmb() asm volatile ("" : : :"memory")
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#define wmb() asm volatile ("" : : :"memory")
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#define set_rmb(var, value) do { xchg(&var, value); } while (0)
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#define set_mb(var, value) set_rmb(var, value)
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#define set_wmb(var, value) do { var = value; wmb(); } while (0)
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#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
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struct __xchg_dummy {
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unsigned long a[100];
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};
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#define __xg(x) ((volatile struct __xchg_dummy *)(x))
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static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
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int size)
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{
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unsigned long tmp = 0;
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unsigned long flags = 0;
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local_irq_save(flags);
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switch (size) {
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case 1:
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__asm__ __volatile__
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("%0 = b%2 (z);\n\t"
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"b%2 = %1;\n\t"
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: "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
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break;
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case 2:
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__asm__ __volatile__
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("%0 = w%2 (z);\n\t"
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"w%2 = %1;\n\t"
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: "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
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break;
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case 4:
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__asm__ __volatile__
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("%0 = %2;\n\t"
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"%2 = %1;\n\t"
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: "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
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break;
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}
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local_irq_restore(flags);
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return tmp;
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}
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void bfin_reset_boot_spi_cs(unsigned short pin);
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#endif /* _BLACKFIN_SYSTEM_H */
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