mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 11:16:15 +09:00
4638b21f2e
The current pinmux handling has spread throughout Blackfin drivers and board code and is getting hideous to maintain. So import the gpio and portmux layer from the Blackfin Linux code. This should spur a serious of cleanups across the Blackfin tree. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
124 lines
2.9 KiB
C
124 lines
2.9 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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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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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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