powerpc: Move include files to arch/powerpc/include/asm
from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Stephen Rothwell
committed by
Paul Mackerras
Paul Mackerras
parent
2b12a4c524
commit
b8b572e101
548
arch/powerpc/include/asm/system.h
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548
arch/powerpc/include/asm/system.h
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@@ -0,0 +1,548 @@
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/*
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* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
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*/
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#ifndef _ASM_POWERPC_SYSTEM_H
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#define _ASM_POWERPC_SYSTEM_H
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#include <linux/kernel.h>
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#include <linux/irqflags.h>
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#include <asm/hw_irq.h>
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/*
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* Memory barrier.
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* The sync instruction guarantees that all memory accesses initiated
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* by this processor have been performed (with respect to all other
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* mechanisms that access memory). The eieio instruction is a barrier
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* providing an ordering (separately) for (a) cacheable stores and (b)
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* loads and stores to non-cacheable memory (e.g. I/O devices).
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*
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* mb() prevents loads and stores being reordered across this point.
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* rmb() prevents loads being reordered across this point.
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* wmb() prevents stores being reordered across this point.
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* read_barrier_depends() prevents data-dependent loads being reordered
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* across this point (nop on PPC).
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*
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* We have to use the sync instructions for mb(), since lwsync doesn't
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* order loads with respect to previous stores. Lwsync is fine for
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* rmb(), though. Note that rmb() actually uses a sync on 32-bit
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* architectures.
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*
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* For wmb(), we use sync since wmb is used in drivers to order
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* stores to system memory with respect to writes to the device.
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* However, smp_wmb() can be a lighter-weight lwsync or eieio barrier
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* on SMP since it is only used to order updates to system memory.
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*/
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#define mb() __asm__ __volatile__ ("sync" : : : "memory")
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#define rmb() __asm__ __volatile__ ("sync" : : : "memory")
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#define wmb() __asm__ __volatile__ ("sync" : : : "memory")
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#define read_barrier_depends() do { } while(0)
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#define set_mb(var, value) do { var = value; mb(); } while (0)
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#ifdef __KERNEL__
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#define AT_VECTOR_SIZE_ARCH 6 /* entries in ARCH_DLINFO */
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#ifdef CONFIG_SMP
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#ifdef __SUBARCH_HAS_LWSYNC
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# define SMPWMB lwsync
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#else
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# define SMPWMB eieio
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#endif
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#define smp_mb() mb()
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#define smp_rmb() rmb()
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#define smp_wmb() __asm__ __volatile__ (__stringify(SMPWMB) : : :"memory")
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#define smp_read_barrier_depends() read_barrier_depends()
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#else
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#define smp_mb() barrier()
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#define smp_rmb() barrier()
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#define smp_wmb() barrier()
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#define smp_read_barrier_depends() do { } while(0)
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#endif /* CONFIG_SMP */
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/*
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* This is a barrier which prevents following instructions from being
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* started until the value of the argument x is known. For example, if
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* x is a variable loaded from memory, this prevents following
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* instructions from being executed until the load has been performed.
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*/
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#define data_barrier(x) \
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asm volatile("twi 0,%0,0; isync" : : "r" (x) : "memory");
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struct task_struct;
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struct pt_regs;
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#if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
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extern int (*__debugger)(struct pt_regs *regs);
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extern int (*__debugger_ipi)(struct pt_regs *regs);
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extern int (*__debugger_bpt)(struct pt_regs *regs);
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extern int (*__debugger_sstep)(struct pt_regs *regs);
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extern int (*__debugger_iabr_match)(struct pt_regs *regs);
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extern int (*__debugger_dabr_match)(struct pt_regs *regs);
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extern int (*__debugger_fault_handler)(struct pt_regs *regs);
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#define DEBUGGER_BOILERPLATE(__NAME) \
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static inline int __NAME(struct pt_regs *regs) \
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{ \
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if (unlikely(__ ## __NAME)) \
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return __ ## __NAME(regs); \
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return 0; \
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}
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DEBUGGER_BOILERPLATE(debugger)
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DEBUGGER_BOILERPLATE(debugger_ipi)
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DEBUGGER_BOILERPLATE(debugger_bpt)
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DEBUGGER_BOILERPLATE(debugger_sstep)
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DEBUGGER_BOILERPLATE(debugger_iabr_match)
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DEBUGGER_BOILERPLATE(debugger_dabr_match)
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DEBUGGER_BOILERPLATE(debugger_fault_handler)
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#else
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static inline int debugger(struct pt_regs *regs) { return 0; }
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static inline int debugger_ipi(struct pt_regs *regs) { return 0; }
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static inline int debugger_bpt(struct pt_regs *regs) { return 0; }
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static inline int debugger_sstep(struct pt_regs *regs) { return 0; }
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static inline int debugger_iabr_match(struct pt_regs *regs) { return 0; }
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static inline int debugger_dabr_match(struct pt_regs *regs) { return 0; }
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static inline int debugger_fault_handler(struct pt_regs *regs) { return 0; }
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#endif
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extern int set_dabr(unsigned long dabr);
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extern void do_dabr(struct pt_regs *regs, unsigned long address,
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unsigned long error_code);
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extern void print_backtrace(unsigned long *);
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extern void show_regs(struct pt_regs * regs);
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extern void flush_instruction_cache(void);
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extern void hard_reset_now(void);
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extern void poweroff_now(void);
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#ifdef CONFIG_6xx
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extern long _get_L2CR(void);
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extern long _get_L3CR(void);
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extern void _set_L2CR(unsigned long);
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extern void _set_L3CR(unsigned long);
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#else
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#define _get_L2CR() 0L
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#define _get_L3CR() 0L
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#define _set_L2CR(val) do { } while(0)
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#define _set_L3CR(val) do { } while(0)
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#endif
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extern void via_cuda_init(void);
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extern void read_rtc_time(void);
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extern void pmac_find_display(void);
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extern void giveup_fpu(struct task_struct *);
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extern void disable_kernel_fp(void);
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extern void enable_kernel_fp(void);
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extern void flush_fp_to_thread(struct task_struct *);
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extern void enable_kernel_altivec(void);
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extern void giveup_altivec(struct task_struct *);
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extern void load_up_altivec(struct task_struct *);
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extern int emulate_altivec(struct pt_regs *);
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extern void __giveup_vsx(struct task_struct *);
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extern void giveup_vsx(struct task_struct *);
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extern void enable_kernel_spe(void);
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extern void giveup_spe(struct task_struct *);
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extern void load_up_spe(struct task_struct *);
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extern int fix_alignment(struct pt_regs *);
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extern void cvt_fd(float *from, double *to, struct thread_struct *thread);
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extern void cvt_df(double *from, float *to, struct thread_struct *thread);
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#ifndef CONFIG_SMP
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extern void discard_lazy_cpu_state(void);
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#else
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static inline void discard_lazy_cpu_state(void)
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{
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}
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#endif
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#ifdef CONFIG_ALTIVEC
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extern void flush_altivec_to_thread(struct task_struct *);
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#else
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static inline void flush_altivec_to_thread(struct task_struct *t)
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{
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}
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#endif
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#ifdef CONFIG_VSX
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extern void flush_vsx_to_thread(struct task_struct *);
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#else
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static inline void flush_vsx_to_thread(struct task_struct *t)
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{
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}
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#endif
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#ifdef CONFIG_SPE
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extern void flush_spe_to_thread(struct task_struct *);
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#else
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static inline void flush_spe_to_thread(struct task_struct *t)
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{
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}
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#endif
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extern int call_rtas(const char *, int, int, unsigned long *, ...);
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extern void cacheable_memzero(void *p, unsigned int nb);
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extern void *cacheable_memcpy(void *, const void *, unsigned int);
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extern int do_page_fault(struct pt_regs *, unsigned long, unsigned long);
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extern void bad_page_fault(struct pt_regs *, unsigned long, int);
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extern int die(const char *, struct pt_regs *, long);
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extern void _exception(int, struct pt_regs *, int, unsigned long);
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extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
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#ifdef CONFIG_BOOKE_WDT
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extern u32 booke_wdt_enabled;
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extern u32 booke_wdt_period;
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#endif /* CONFIG_BOOKE_WDT */
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struct device_node;
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extern void note_scsi_host(struct device_node *, void *);
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extern struct task_struct *__switch_to(struct task_struct *,
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struct task_struct *);
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#define switch_to(prev, next, last) ((last) = __switch_to((prev), (next)))
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struct thread_struct;
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extern struct task_struct *_switch(struct thread_struct *prev,
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struct thread_struct *next);
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extern unsigned int rtas_data;
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extern int mem_init_done; /* set on boot once kmalloc can be called */
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extern int init_bootmem_done; /* set on !NUMA once bootmem is available */
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extern unsigned long memory_limit;
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extern unsigned long klimit;
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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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extern int powersave_nap; /* set if nap mode can be used in idle loop */
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/*
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* Atomic exchange
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*
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* Changes the memory location '*ptr' to be val and returns
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* the previous value stored there.
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*/
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static __always_inline unsigned long
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__xchg_u32(volatile void *p, unsigned long val)
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{
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unsigned long prev;
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__asm__ __volatile__(
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LWSYNC_ON_SMP
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"1: lwarx %0,0,%2 \n"
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PPC405_ERR77(0,%2)
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" stwcx. %3,0,%2 \n\
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bne- 1b"
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ISYNC_ON_SMP
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: "=&r" (prev), "+m" (*(volatile unsigned int *)p)
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: "r" (p), "r" (val)
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: "cc", "memory");
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return prev;
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}
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/*
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* Atomic exchange
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*
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* Changes the memory location '*ptr' to be val and returns
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* the previous value stored there.
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*/
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static __always_inline unsigned long
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__xchg_u32_local(volatile void *p, unsigned long val)
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{
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unsigned long prev;
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__asm__ __volatile__(
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"1: lwarx %0,0,%2 \n"
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PPC405_ERR77(0,%2)
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" stwcx. %3,0,%2 \n\
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bne- 1b"
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: "=&r" (prev), "+m" (*(volatile unsigned int *)p)
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: "r" (p), "r" (val)
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: "cc", "memory");
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return prev;
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}
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#ifdef CONFIG_PPC64
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static __always_inline unsigned long
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__xchg_u64(volatile void *p, unsigned long val)
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{
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unsigned long prev;
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__asm__ __volatile__(
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LWSYNC_ON_SMP
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"1: ldarx %0,0,%2 \n"
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PPC405_ERR77(0,%2)
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" stdcx. %3,0,%2 \n\
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bne- 1b"
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ISYNC_ON_SMP
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: "=&r" (prev), "+m" (*(volatile unsigned long *)p)
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: "r" (p), "r" (val)
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: "cc", "memory");
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return prev;
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}
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static __always_inline unsigned long
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__xchg_u64_local(volatile void *p, unsigned long val)
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{
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unsigned long prev;
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__asm__ __volatile__(
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"1: ldarx %0,0,%2 \n"
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PPC405_ERR77(0,%2)
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" stdcx. %3,0,%2 \n\
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bne- 1b"
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: "=&r" (prev), "+m" (*(volatile unsigned long *)p)
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: "r" (p), "r" (val)
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: "cc", "memory");
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return prev;
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}
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#endif
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/*
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* This function doesn't exist, so you'll get a linker error
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* if something tries to do an invalid xchg().
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*/
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extern void __xchg_called_with_bad_pointer(void);
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static __always_inline unsigned long
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__xchg(volatile void *ptr, unsigned long x, unsigned int size)
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{
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switch (size) {
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case 4:
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return __xchg_u32(ptr, x);
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#ifdef CONFIG_PPC64
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case 8:
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return __xchg_u64(ptr, x);
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#endif
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}
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__xchg_called_with_bad_pointer();
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return x;
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}
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static __always_inline unsigned long
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__xchg_local(volatile void *ptr, unsigned long x, unsigned int size)
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{
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switch (size) {
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case 4:
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return __xchg_u32_local(ptr, x);
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#ifdef CONFIG_PPC64
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case 8:
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return __xchg_u64_local(ptr, x);
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#endif
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}
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__xchg_called_with_bad_pointer();
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return x;
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}
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#define xchg(ptr,x) \
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({ \
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__typeof__(*(ptr)) _x_ = (x); \
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(__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, sizeof(*(ptr))); \
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})
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#define xchg_local(ptr,x) \
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({ \
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__typeof__(*(ptr)) _x_ = (x); \
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(__typeof__(*(ptr))) __xchg_local((ptr), \
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(unsigned long)_x_, sizeof(*(ptr))); \
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})
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/*
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* Compare and exchange - if *p == old, set it to new,
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* and return the old value of *p.
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*/
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#define __HAVE_ARCH_CMPXCHG 1
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static __always_inline unsigned long
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__cmpxchg_u32(volatile unsigned int *p, unsigned long old, unsigned long new)
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{
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unsigned int prev;
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__asm__ __volatile__ (
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LWSYNC_ON_SMP
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"1: lwarx %0,0,%2 # __cmpxchg_u32\n\
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cmpw 0,%0,%3\n\
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bne- 2f\n"
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PPC405_ERR77(0,%2)
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" stwcx. %4,0,%2\n\
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bne- 1b"
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ISYNC_ON_SMP
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"\n\
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2:"
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: "=&r" (prev), "+m" (*p)
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: "r" (p), "r" (old), "r" (new)
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: "cc", "memory");
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return prev;
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}
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static __always_inline unsigned long
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__cmpxchg_u32_local(volatile unsigned int *p, unsigned long old,
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unsigned long new)
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{
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unsigned int prev;
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__asm__ __volatile__ (
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"1: lwarx %0,0,%2 # __cmpxchg_u32\n\
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cmpw 0,%0,%3\n\
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bne- 2f\n"
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PPC405_ERR77(0,%2)
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" stwcx. %4,0,%2\n\
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bne- 1b"
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"\n\
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2:"
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: "=&r" (prev), "+m" (*p)
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: "r" (p), "r" (old), "r" (new)
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: "cc", "memory");
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return prev;
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}
|
||||
|
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#ifdef CONFIG_PPC64
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static __always_inline unsigned long
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__cmpxchg_u64(volatile unsigned long *p, unsigned long old, unsigned long new)
|
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{
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unsigned long prev;
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__asm__ __volatile__ (
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LWSYNC_ON_SMP
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"1: ldarx %0,0,%2 # __cmpxchg_u64\n\
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cmpd 0,%0,%3\n\
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bne- 2f\n\
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stdcx. %4,0,%2\n\
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bne- 1b"
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ISYNC_ON_SMP
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"\n\
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2:"
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: "=&r" (prev), "+m" (*p)
|
||||
: "r" (p), "r" (old), "r" (new)
|
||||
: "cc", "memory");
|
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|
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return prev;
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}
|
||||
|
||||
static __always_inline unsigned long
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__cmpxchg_u64_local(volatile unsigned long *p, unsigned long old,
|
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unsigned long new)
|
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{
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unsigned long prev;
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|
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__asm__ __volatile__ (
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"1: ldarx %0,0,%2 # __cmpxchg_u64\n\
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cmpd 0,%0,%3\n\
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bne- 2f\n\
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stdcx. %4,0,%2\n\
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bne- 1b"
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"\n\
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2:"
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: "=&r" (prev), "+m" (*p)
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||||
: "r" (p), "r" (old), "r" (new)
|
||||
: "cc", "memory");
|
||||
|
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return prev;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* This function doesn't exist, so you'll get a linker error
|
||||
if something tries to do an invalid cmpxchg(). */
|
||||
extern void __cmpxchg_called_with_bad_pointer(void);
|
||||
|
||||
static __always_inline unsigned long
|
||||
__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new,
|
||||
unsigned int size)
|
||||
{
|
||||
switch (size) {
|
||||
case 4:
|
||||
return __cmpxchg_u32(ptr, old, new);
|
||||
#ifdef CONFIG_PPC64
|
||||
case 8:
|
||||
return __cmpxchg_u64(ptr, old, new);
|
||||
#endif
|
||||
}
|
||||
__cmpxchg_called_with_bad_pointer();
|
||||
return old;
|
||||
}
|
||||
|
||||
static __always_inline unsigned long
|
||||
__cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new,
|
||||
unsigned int size)
|
||||
{
|
||||
switch (size) {
|
||||
case 4:
|
||||
return __cmpxchg_u32_local(ptr, old, new);
|
||||
#ifdef CONFIG_PPC64
|
||||
case 8:
|
||||
return __cmpxchg_u64_local(ptr, old, new);
|
||||
#endif
|
||||
}
|
||||
__cmpxchg_called_with_bad_pointer();
|
||||
return old;
|
||||
}
|
||||
|
||||
#define cmpxchg(ptr, o, n) \
|
||||
({ \
|
||||
__typeof__(*(ptr)) _o_ = (o); \
|
||||
__typeof__(*(ptr)) _n_ = (n); \
|
||||
(__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \
|
||||
(unsigned long)_n_, sizeof(*(ptr))); \
|
||||
})
|
||||
|
||||
|
||||
#define cmpxchg_local(ptr, o, n) \
|
||||
({ \
|
||||
__typeof__(*(ptr)) _o_ = (o); \
|
||||
__typeof__(*(ptr)) _n_ = (n); \
|
||||
(__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \
|
||||
(unsigned long)_n_, sizeof(*(ptr))); \
|
||||
})
|
||||
|
||||
#ifdef CONFIG_PPC64
|
||||
/*
|
||||
* We handle most unaligned accesses in hardware. On the other hand
|
||||
* unaligned DMA can be very expensive on some ppc64 IO chips (it does
|
||||
* powers of 2 writes until it reaches sufficient alignment).
|
||||
*
|
||||
* Based on this we disable the IP header alignment in network drivers.
|
||||
* We also modify NET_SKB_PAD to be a cacheline in size, thus maintaining
|
||||
* cacheline alignment of buffers.
|
||||
*/
|
||||
#define NET_IP_ALIGN 0
|
||||
#define NET_SKB_PAD L1_CACHE_BYTES
|
||||
|
||||
#define cmpxchg64(ptr, o, n) \
|
||||
({ \
|
||||
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
|
||||
cmpxchg((ptr), (o), (n)); \
|
||||
})
|
||||
#define cmpxchg64_local(ptr, o, n) \
|
||||
({ \
|
||||
BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
|
||||
cmpxchg_local((ptr), (o), (n)); \
|
||||
})
|
||||
#else
|
||||
#include <asm-generic/cmpxchg-local.h>
|
||||
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
|
||||
#endif
|
||||
|
||||
#define arch_align_stack(x) (x)
|
||||
|
||||
/* Used in very early kernel initialization. */
|
||||
extern unsigned long reloc_offset(void);
|
||||
extern unsigned long add_reloc_offset(unsigned long);
|
||||
extern void reloc_got2(unsigned long);
|
||||
|
||||
#define PTRRELOC(x) ((typeof(x)) add_reloc_offset((unsigned long)(x)))
|
||||
|
||||
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
|
||||
extern void account_system_vtime(struct task_struct *);
|
||||
#endif
|
||||
|
||||
extern struct dentry *powerpc_debugfs_root;
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
#endif /* _ASM_POWERPC_SYSTEM_H */
|
||||
Reference in New Issue
Block a user