forked from Minki/linux
e0e33280fe
This reverts commit 39e0786d3c.
On request from microblaze developers, they are going to handle
this differently.
Signed-off-by: David S. Miller <davem@davemloft.net>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_SYSTEM_H
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#define _ASM_MICROBLAZE_SYSTEM_H
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#include <asm/registers.h>
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#include <asm/setup.h>
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#include <asm/irqflags.h>
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#include <asm/cache.h>
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#include <asm-generic/cmpxchg.h>
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#include <asm-generic/cmpxchg-local.h>
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#define __ARCH_WANT_INTERRUPTS_ON_CTXSW
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struct task_struct;
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struct thread_info;
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extern struct task_struct *_switch_to(struct thread_info *prev,
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struct thread_info *next);
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#define switch_to(prev, next, last) \
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do { \
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(last) = _switch_to(task_thread_info(prev), \
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task_thread_info(next)); \
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} while (0)
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#define smp_read_barrier_depends() do {} while (0)
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#define read_barrier_depends() do {} while (0)
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#define nop() asm volatile ("nop")
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#define mb() barrier()
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#define rmb() mb()
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#define wmb() mb()
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#define set_mb(var, value) do { var = value; mb(); } while (0)
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#define set_wmb(var, value) do { var = value; wmb(); } while (0)
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#define smp_mb() mb()
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#define smp_rmb() rmb()
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#define smp_wmb() wmb()
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void show_trace(struct task_struct *task, unsigned long *stack);
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void __bad_xchg(volatile void *ptr, int size);
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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 ret;
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unsigned long flags;
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switch (size) {
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case 1:
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local_irq_save(flags);
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ret = *(volatile unsigned char *)ptr;
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*(volatile unsigned char *)ptr = x;
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local_irq_restore(flags);
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break;
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case 4:
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local_irq_save(flags);
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ret = *(volatile unsigned long *)ptr;
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*(volatile unsigned long *)ptr = x;
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local_irq_restore(flags);
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break;
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default:
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__bad_xchg(ptr, size), ret = 0;
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break;
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}
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return ret;
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}
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void disable_hlt(void);
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void enable_hlt(void);
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void default_idle(void);
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#define xchg(ptr, x) \
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((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
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void free_init_pages(char *what, unsigned long begin, unsigned long end);
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void free_initmem(void);
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extern char *klimit;
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extern void ret_from_fork(void);
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extern void *alloc_maybe_bootmem(size_t size, gfp_t mask);
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extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
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#ifdef CONFIG_DEBUG_FS
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extern struct dentry *of_debugfs_root;
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#endif
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#define arch_align_stack(x) (x)
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/*
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* MicroBlaze doesn't handle unaligned accesses in hardware.
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*
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* Based on this we force the IP header alignment in network drivers.
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* We also modify NET_SKB_PAD to be a cacheline in size, thus maintaining
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* cacheline alignment of buffers.
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*/
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#define NET_IP_ALIGN 2
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#define NET_SKB_PAD L1_CACHE_BYTES
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#endif /* _ASM_MICROBLAZE_SYSTEM_H */
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