include/asm-m68knommu/system.h - kernel/msm-4.9 - Gitiles

 #ifndef _M68KNOMMU_SYSTEM_H
 #define _M68KNOMMU_SYSTEM_H

 #include <linux/linkage.h>
 #include <asm/segment.h>
 #include <asm/entry.h>

 /*
  * switch_to(n) should switch tasks to task ptr, first checking that
  * ptr isn't the current task, in which case it does nothing.  This
  * also clears the TS-flag if the task we switched to has used the
  * math co-processor latest.
  */
 /*
  * switch_to() saves the extra registers, that are not saved
  * automatically by SAVE_SWITCH_STACK in resume(), ie. d0-d5 and
  * a0-a1. Some of these are used by schedule() and its predecessors
  * and so we might get see unexpected behaviors when a task returns
  * with unexpected register values.
  *
  * syscall stores these registers itself and none of them are used
  * by syscall after the function in the syscall has been called.
  *
  * Beware that resume now expects *next to be in d1 and the offset of
  * tss to be in a1. This saves a few instructions as we no longer have
  * to push them onto the stack and read them back right after.
  *
  * 02/17/96 - Jes Sorensen (jds@kom.auc.dk)
  *
  * Changed 96/09/19 by Andreas Schwab
  * pass prev in a0, next in a1, offset of tss in d1, and whether
  * the mm structures are shared in d2 (to avoid atc flushing).
  */
 asmlinkage void resume(void);
 #define switch_to(prev,next,last)				\
 {								\
   void *_last;							\
   __asm__ __volatile__(						\
   	"movel	%1, %%a0\n\t"					\
 	"movel	%2, %%a1\n\t"					\
 	"jbsr resume\n\t"					\
 	"movel	%%d1, %0\n\t"					\
        : "=d" (_last)						\
        : "d" (prev), "d" (next)					\
        : "cc", "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1");	\
   (last) = _last;						\
 }

 #ifdef CONFIG_COLDFIRE
 #define local_irq_enable() __asm__ __volatile__ (		\
 	"move %/sr,%%d0\n\t"					\
 	"andi.l #0xf8ff,%%d0\n\t"				\
 	"move %%d0,%/sr\n"					\
 	: /* no outputs */					\
 	:							\
         : "cc", "%d0", "memory")
 #define local_irq_disable() __asm__ __volatile__ (		\
 	"move %/sr,%%d0\n\t"					\
 	"ori.l #0x0700,%%d0\n\t"				\
 	"move %%d0,%/sr\n"					\
 	: /* no outputs */					\
 	:							\
 	: "cc", "%d0", "memory")
 /* For spinlocks etc */
 #define local_irq_save(x) __asm__ __volatile__ (		\
 	"movew %%sr,%0\n\t"					\
 	"movew #0x0700,%%d0\n\t"				\
 	"or.l  %0,%%d0\n\t"					\
 	"movew %%d0,%/sr"					\
 	: "=d" (x)						\
 	:							\
 	: "cc", "%d0", "memory")
 #else

 /* portable version */ /* FIXME - see entry.h*/
 #define ALLOWINT 0xf8ff

 #define local_irq_enable() asm volatile ("andiw %0,%%sr": : "i" (ALLOWINT) : "memory")
 #define local_irq_disable() asm volatile ("oriw  #0x0700,%%sr": : : "memory")
 #endif

 #define local_save_flags(x) asm volatile ("movew %%sr,%0":"=d" (x) : : "memory")
 #define local_irq_restore(x) asm volatile ("movew %0,%%sr": :"d" (x) : "memory")

 /* For spinlocks etc */
 #ifndef local_irq_save
 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } while (0)
 #endif

 #define	irqs_disabled()			\
 ({					\
 	unsigned long flags;		\
 	local_save_flags(flags);	\
 	((flags & 0x0700) == 0x0700);	\
 })

 #define iret() __asm__ __volatile__ ("rte": : :"memory", "sp", "cc")

 /*
  * Force strict CPU ordering.
  * Not really required on m68k...
  */
 #define nop()  asm volatile ("nop"::)
 #define mb()   asm volatile (""   : : :"memory")
 #define rmb()  asm volatile (""   : : :"memory")
 #define wmb()  asm volatile (""   : : :"memory")
 #define set_rmb(var, value)    do { xchg(&var, value); } while (0)
 #define set_mb(var, value)     set_rmb(var, value)
 #define set_wmb(var, value)    do { var = value; wmb(); } while (0)

 #ifdef CONFIG_SMP
 #define smp_mb()	mb()
 #define smp_rmb()	rmb()
 #define smp_wmb()	wmb()
 #define smp_read_barrier_depends()	read_barrier_depends()
 #else
 #define smp_mb()	barrier()
 #define smp_rmb()	barrier()
 #define smp_wmb()	barrier()
 #define smp_read_barrier_depends()	do { } while(0)
 #endif

 #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
 #define tas(ptr) (xchg((ptr),1))

 struct __xchg_dummy { unsigned long a[100]; };
 #define __xg(x) ((volatile struct __xchg_dummy *)(x))

 #ifndef CONFIG_RMW_INSNS
 static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
 {
   unsigned long tmp, flags;

   local_irq_save(flags);

   switch (size) {
   case 1:
     __asm__ __volatile__
     ("moveb %2,%0\n\t"
      "moveb %1,%2"
     : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
     break;
   case 2:
     __asm__ __volatile__
     ("movew %2,%0\n\t"
      "movew %1,%2"
     : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
     break;
   case 4:
     __asm__ __volatile__
     ("movel %2,%0\n\t"
      "movel %1,%2"
     : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
     break;
   }
   local_irq_restore(flags);
   return tmp;
 }
 #else
 static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
 {
 	switch (size) {
 	    case 1:
 		__asm__ __volatile__
 			("moveb %2,%0\n\t"
 			 "1:\n\t"
 			 "casb %0,%1,%2\n\t"
 			 "jne 1b"
 			 : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
 		break;
 	    case 2:
 		__asm__ __volatile__
 			("movew %2,%0\n\t"
 			 "1:\n\t"
 			 "casw %0,%1,%2\n\t"
 			 "jne 1b"
 			 : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
 		break;
 	    case 4:
 		__asm__ __volatile__
 			("movel %2,%0\n\t"
 			 "1:\n\t"
 			 "casl %0,%1,%2\n\t"
 			 "jne 1b"
 			 : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
 		break;
 	}
 	return x;
 }
 #endif

 /*
  * Atomic compare and exchange.  Compare OLD with MEM, if identical,
  * store NEW in MEM.  Return the initial value in MEM.  Success is
  * indicated by comparing RETURN with OLD.
  */
 #define __HAVE_ARCH_CMPXCHG	1

 static __inline__ unsigned long
 cmpxchg(volatile int *p, int old, int new)
 {
 	unsigned long flags;
 	int prev;

 	local_irq_save(flags);
 	if ((prev = *p) == old)
 		*p = new;
 	local_irq_restore(flags);
 	return(prev);
 }


 #ifdef CONFIG_M68332
 #define HARD_RESET_NOW() ({		\
         local_irq_disable();		\
         asm("				\
 	movew   #0x0000, 0xfffa6a;	\
         reset;				\
         /*movew #0x1557, 0xfffa44;*/	\
         /*movew #0x0155, 0xfffa46;*/	\
         moveal #0, %a0;			\
         movec %a0, %vbr;		\
         moveal 0, %sp;			\
         moveal 4, %a0;			\
         jmp (%a0);			\
         ");				\
 })
 #endif

 #if defined( CONFIG_M68328 ) || defined( CONFIG_M68EZ328 ) || \
 	defined (CONFIG_M68360) || defined( CONFIG_M68VZ328 )
 #define HARD_RESET_NOW() ({		\
         local_irq_disable();		\
         asm("				\
         moveal #0x10c00000, %a0;	\
         moveb #0, 0xFFFFF300;		\
         moveal 0(%a0), %sp;		\
         moveal 4(%a0), %a0;		\
         jmp (%a0);			\
         ");				\
 })
 #endif

 #ifdef CONFIG_COLDFIRE
 #if defined(CONFIG_M5272) && defined(CONFIG_NETtel)
 /*
  * Need to account for broken early mask of 5272 silicon. So don't
  * jump through the original start address. Jump strait into the
  * known start of the FLASH code.
  */
 #define HARD_RESET_NOW() ({		\
         asm("				\
 	movew #0x2700, %sr;		\
         jmp 0xf0000400;			\
         ");				\
 })
 #elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || \
       defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || \
       defined(CONFIG_CLEOPATRA)
 #define HARD_RESET_NOW() ({		\
         asm("				\
 	movew #0x2700, %sr;		\
 	moveal #0x10000044, %a0;	\
 	movel #0xffffffff, (%a0);	\
 	moveal #0x10000001, %a0;	\
 	moveb #0x00, (%a0);		\
         moveal #0xf0000004, %a0;	\
         moveal (%a0), %a0;		\
         jmp (%a0);			\
         ");				\
 })
 #elif defined(CONFIG_M5272)
 /*
  * Retrieve the boot address in flash using CSBR0 and CSOR0
  * find the reset vector at flash_address + 4 (e.g. 0x400)
  * remap it in the flash's current location (e.g. 0xf0000400)
  * and jump there.
  */
 #define HARD_RESET_NOW() ({		\
 	asm("				\
 	movew #0x2700, %%sr;		\
 	move.l	%0+0x40,%%d0;		\
 	and.l	%0+0x44,%%d0;		\
 	andi.l	#0xfffff000,%%d0;	\
 	mov.l	%%d0,%%a0;		\
 	or.l	4(%%a0),%%d0;		\
 	mov.l	%%d0,%%a0;		\
 	jmp (%%a0);"			\
 	: /* No output */		\
 	: "o" (*(char *)MCF_MBAR) );	\
 })
 #elif defined(CONFIG_M528x)
 /*
  * The MCF528x has a bit (SOFTRST) in memory (Reset Control Register RCR),
  * that when set, resets the MCF528x.
  */
 #define HARD_RESET_NOW() \
 ({						\
 	unsigned char volatile *reset;		\
 	asm("move.w	#0x2700, %sr");		\
 	reset = ((volatile unsigned short *)(MCF_IPSBAR + 0x110000));	\
 	while(1)				\
 	*reset |= (0x01 << 7);\
 })
 #elif defined(CONFIG_M523x)
 #define HARD_RESET_NOW() ({		\
 	asm("				\
 	movew #0x2700, %sr;		\
 	movel #0x01000000, %sp;		\
 	moveal #0x40110000, %a0;	\
 	moveb #0x80, (%a0);		\
 	");				\
 })
 #elif defined(CONFIG_M520x)
 	/*
 	 * The MCF5208 has a bit (SOFTRST) in memory (Reset Control Register
 	 * RCR), that when set, resets the MCF5208.
 	 */
 #define HARD_RESET_NOW() 		\
 ({					\
 	unsigned char volatile *reset;	\
 	asm("move.w     #0x2700, %sr");	\
 	reset = ((volatile unsigned short *)(MCF_IPSBAR + 0xA0000));	\
 	while(1)			\
 		*reset |= 0x80;		\
 })
 #else
 #define HARD_RESET_NOW() ({		\
         asm("				\
 	movew #0x2700, %sr;		\
         moveal #0x4, %a0;		\
         moveal (%a0), %a0;		\
         jmp (%a0);			\
         ");				\
 })
 #endif
 #endif
 #define arch_align_stack(x) (x)

 #endif /* _M68KNOMMU_SYSTEM_H */
	#ifndef _M68KNOMMU_SYSTEM_H
	#define _M68KNOMMU_SYSTEM_H

	#include <linux/linkage.h>
	#include <asm/segment.h>
	#include <asm/entry.h>

	/*
	* switch_to(n) should switch tasks to task ptr, first checking that
	* ptr isn't the current task, in which case it does nothing. This
	* also clears the TS-flag if the task we switched to has used the
	* math co-processor latest.
	*/
	/*
	* switch_to() saves the extra registers, that are not saved
	* automatically by SAVE_SWITCH_STACK in resume(), ie. d0-d5 and
	* a0-a1. Some of these are used by schedule() and its predecessors
	* and so we might get see unexpected behaviors when a task returns
	* with unexpected register values.
	*
	* syscall stores these registers itself and none of them are used
	* by syscall after the function in the syscall has been called.
	*
	* Beware that resume now expects *next to be in d1 and the offset of
	* tss to be in a1. This saves a few instructions as we no longer have
	* to push them onto the stack and read them back right after.
	*
	* 02/17/96 - Jes Sorensen (jds@kom.auc.dk)
	*
	* Changed 96/09/19 by Andreas Schwab
	* pass prev in a0, next in a1, offset of tss in d1, and whether
	* the mm structures are shared in d2 (to avoid atc flushing).
	*/
	asmlinkage void resume(void);
	#define switch_to(prev,next,last) \
	{ \
	void *_last; \
	__asm__ __volatile__( \
	"movel %1, %%a0\n\t" \
	"movel %2, %%a1\n\t" \
	"jbsr resume\n\t" \
	"movel %%d1, %0\n\t" \
	: "=d" (_last) \
	: "d" (prev), "d" (next) \
	: "cc", "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1"); \
	(last) = _last; \
	}

	#ifdef CONFIG_COLDFIRE
	#define local_irq_enable() __asm__ __volatile__ ( \
	"move %/sr,%%d0\n\t" \
	"andi.l #0xf8ff,%%d0\n\t" \
	"move %%d0,%/sr\n" \
	: /* no outputs */ \
	: \
	: "cc", "%d0", "memory")
	#define local_irq_disable() __asm__ __volatile__ ( \
	"move %/sr,%%d0\n\t" \
	"ori.l #0x0700,%%d0\n\t" \
	"move %%d0,%/sr\n" \
	: /* no outputs */ \
	: \
	: "cc", "%d0", "memory")
	/* For spinlocks etc */
	#define local_irq_save(x) __asm__ __volatile__ ( \
	"movew %%sr,%0\n\t" \
	"movew #0x0700,%%d0\n\t" \
	"or.l %0,%%d0\n\t" \
	"movew %%d0,%/sr" \
	: "=d" (x) \
	: \
	: "cc", "%d0", "memory")
	#else

	/* portable version / / FIXME - see entry.h*/
	#define ALLOWINT 0xf8ff

	#define local_irq_enable() asm volatile ("andiw %0,%%sr": : "i" (ALLOWINT) : "memory")
	#define local_irq_disable() asm volatile ("oriw #0x0700,%%sr": : : "memory")
	#endif

	#define local_save_flags(x) asm volatile ("movew %%sr,%0":"=d" (x) : : "memory")
	#define local_irq_restore(x) asm volatile ("movew %0,%%sr": :"d" (x) : "memory")

	/* For spinlocks etc */
	#ifndef local_irq_save
	#define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } while (0)
	#endif

	#define irqs_disabled() \
	({ \
	unsigned long flags; \
	local_save_flags(flags); \
	((flags & 0x0700) == 0x0700); \
	})

	#define iret() __asm__ __volatile__ ("rte": : :"memory", "sp", "cc")

	/*
	* Force strict CPU ordering.
	* Not really required on m68k...
	*/
	#define nop() asm volatile ("nop"::)
	#define mb() asm volatile ("" : : :"memory")
	#define rmb() asm volatile ("" : : :"memory")
	#define wmb() asm volatile ("" : : :"memory")
	#define set_rmb(var, value) do { xchg(&var, value); } while (0)
	#define set_mb(var, value) set_rmb(var, value)
	#define set_wmb(var, value) do { var = value; wmb(); } while (0)

	#ifdef CONFIG_SMP
	#define smp_mb() mb()
	#define smp_rmb() rmb()
	#define smp_wmb() wmb()
	#define smp_read_barrier_depends() read_barrier_depends()
	#else
	#define smp_mb() barrier()
	#define smp_rmb() barrier()
	#define smp_wmb() barrier()
	#define smp_read_barrier_depends() do { } while(0)
	#endif

	#define xchg(ptr,x) ((__typeof__((ptr)))__xchg((unsigned long)(x),(ptr),sizeof((ptr))))
	#define tas(ptr) (xchg((ptr),1))

	struct __xchg_dummy { unsigned long a[100]; };
	#define __xg(x) ((volatile struct __xchg_dummy *)(x))

	#ifndef CONFIG_RMW_INSNS
	static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
	{
	unsigned long tmp, flags;

	local_irq_save(flags);

	switch (size) {
	case 1:
	__asm__ __volatile__
	("moveb %2,%0\n\t"
	"moveb %1,%2"
	: "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
	break;
	case 2:
	__asm__ __volatile__
	("movew %2,%0\n\t"
	"movew %1,%2"
	: "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
	break;
	case 4:
	__asm__ __volatile__
	("movel %2,%0\n\t"
	"movel %1,%2"
	: "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
	break;
	}
	local_irq_restore(flags);
	return tmp;
	}
	#else
	static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
	{
	switch (size) {
	case 1:
	__asm__ __volatile__
	("moveb %2,%0\n\t"
	"1:\n\t"
	"casb %0,%1,%2\n\t"
	"jne 1b"
	: "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
	break;
	case 2:
	__asm__ __volatile__
	("movew %2,%0\n\t"
	"1:\n\t"
	"casw %0,%1,%2\n\t"
	"jne 1b"
	: "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
	break;
	case 4:
	__asm__ __volatile__
	("movel %2,%0\n\t"
	"1:\n\t"
	"casl %0,%1,%2\n\t"
	"jne 1b"
	: "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
	break;
	}
	return x;
	}
	#endif

	/*
	* Atomic compare and exchange. Compare OLD with MEM, if identical,
	* store NEW in MEM. Return the initial value in MEM. Success is
	* indicated by comparing RETURN with OLD.
	*/
	#define __HAVE_ARCH_CMPXCHG 1

	static __inline__ unsigned long
	cmpxchg(volatile int *p, int old, int new)
	{
	unsigned long flags;
	int prev;

	local_irq_save(flags);
	if ((prev = *p) == old)
	*p = new;
	local_irq_restore(flags);
	return(prev);
	}


	#ifdef CONFIG_M68332
	#define HARD_RESET_NOW() ({ \
	local_irq_disable(); \
	asm(" \
	movew #0x0000, 0xfffa6a; \
	reset; \
	/movew #0x1557, 0xfffa44;/ \
	/movew #0x0155, 0xfffa46;/ \
	moveal #0, %a0; \
	movec %a0, %vbr; \
	moveal 0, %sp; \
	moveal 4, %a0; \
	jmp (%a0); \
	"); \
	})
	#endif

	#if defined( CONFIG_M68328 ) \|\| defined( CONFIG_M68EZ328 ) \|\| \
	defined (CONFIG_M68360) \|\| defined( CONFIG_M68VZ328 )
	#define HARD_RESET_NOW() ({ \
	local_irq_disable(); \
	asm(" \
	moveal #0x10c00000, %a0; \
	moveb #0, 0xFFFFF300; \
	moveal 0(%a0), %sp; \
	moveal 4(%a0), %a0; \
	jmp (%a0); \
	"); \
	})
	#endif

	#ifdef CONFIG_COLDFIRE
	#if defined(CONFIG_M5272) && defined(CONFIG_NETtel)
	/*
	* Need to account for broken early mask of 5272 silicon. So don't
	* jump through the original start address. Jump strait into the
	* known start of the FLASH code.
	*/
	#define HARD_RESET_NOW() ({ \
	asm(" \
	movew #0x2700, %sr; \
	jmp 0xf0000400; \
	"); \
	})
	#elif defined(CONFIG_NETtel) \|\| defined(CONFIG_eLIA) \|\| \
	defined(CONFIG_DISKtel) \|\| defined(CONFIG_SECUREEDGEMP3) \|\| \
	defined(CONFIG_CLEOPATRA)
	#define HARD_RESET_NOW() ({ \
	asm(" \
	movew #0x2700, %sr; \
	moveal #0x10000044, %a0; \
	movel #0xffffffff, (%a0); \
	moveal #0x10000001, %a0; \
	moveb #0x00, (%a0); \
	moveal #0xf0000004, %a0; \
	moveal (%a0), %a0; \
	jmp (%a0); \
	"); \
	})
	#elif defined(CONFIG_M5272)
	/*
	* Retrieve the boot address in flash using CSBR0 and CSOR0
	* find the reset vector at flash_address + 4 (e.g. 0x400)
	* remap it in the flash's current location (e.g. 0xf0000400)
	* and jump there.
	*/
	#define HARD_RESET_NOW() ({ \
	asm(" \
	movew #0x2700, %%sr; \
	move.l %0+0x40,%%d0; \
	and.l %0+0x44,%%d0; \
	andi.l #0xfffff000,%%d0; \
	mov.l %%d0,%%a0; \
	or.l 4(%%a0),%%d0; \
	mov.l %%d0,%%a0; \
	jmp (%%a0);" \
	: /* No output */ \
	: "o" ((char )MCF_MBAR) ); \
	})
	#elif defined(CONFIG_M528x)
	/*
	* The MCF528x has a bit (SOFTRST) in memory (Reset Control Register RCR),
	* that when set, resets the MCF528x.
	*/
	#define HARD_RESET_NOW() \
	({ \
	unsigned char volatile *reset; \
	asm("move.w #0x2700, %sr"); \
	reset = ((volatile unsigned short *)(MCF_IPSBAR + 0x110000)); \
	while(1) \
	*reset \|= (0x01 << 7);\
	})
	#elif defined(CONFIG_M523x)
	#define HARD_RESET_NOW() ({ \
	asm(" \
	movew #0x2700, %sr; \
	movel #0x01000000, %sp; \
	moveal #0x40110000, %a0; \
	moveb #0x80, (%a0); \
	"); \
	})
	#elif defined(CONFIG_M520x)
	/*
	* The MCF5208 has a bit (SOFTRST) in memory (Reset Control Register
	* RCR), that when set, resets the MCF5208.
	*/
	#define HARD_RESET_NOW() \
	({ \
	unsigned char volatile *reset; \
	asm("move.w #0x2700, %sr"); \
	reset = ((volatile unsigned short *)(MCF_IPSBAR + 0xA0000)); \
	while(1) \
	*reset \|= 0x80; \
	})
	#else
	#define HARD_RESET_NOW() ({ \
	asm(" \
	movew #0x2700, %sr; \
	moveal #0x4, %a0; \
	moveal (%a0), %a0; \
	jmp (%a0); \
	"); \
	})
	#endif
	#endif
	#define arch_align_stack(x) (x)

	#endif /* _M68KNOMMU_SYSTEM_H */