#ifndef __ASM_SH64_SYSTEM_H
#define __ASM_SH64_SYSTEM_H
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* include/asm-sh64/system.h
*
* Copyright (C) 2000, 2001 Paolo Alberelli
* Copyright (C) 2003 Paul Mundt
*
*/
#include <linux/config.h>
#include <asm/registers.h>
/*
* switch_to() should switch tasks to task nr n, first
*/
typedef struct {
unsigned long seg;
} mm_segment_t;
#ifdef CONFIG_SMP
#error "no SMP SH64"
#else
#define prepare_to_switch() do { } while(0)
#ifndef CS_SAVE_ALL
#define SAVE_CALLER_SAVED
#define RESTORE_CALLER_SAVED
#else
#define SAVE_CALLER_SAVED \
__asm__ __volatile__("addi.l r15, -256, r15\n\t" \
"st.q r15, 0, r0\n\t" \
"st.q r15, 8, r1\n\t" \
"st.q r15, 16, r2\n\t" \
"st.q r15, 24, r3\n\t" \
"st.q r15, 32, r4\n\t" \
"st.q r15, 40, r5\n\t" \
"st.q r15, 48, r6\n\t" \
"st.q r15, 56, r7\n\t" \
"st.q r15, 64, r8\n\t" \
"st.q r15, 72, r9\n\t" \
"st.q r15, 80, r17\n\t" \
"st.q r15, 88, r19\n\t" \
"st.q r15, 96, r20\n\t" \
"st.q r15, 104, r21\n\t" \
"st.q r15, 112, r22\n\t" \
"st.q r15, 120, r23\n\t" \
"st.q r15, 128, r36\n\t" \
"st.q r15, 136, r37\n\t" \
"st.q r15, 144, r38\n\t" \
"st.q r15, 152, r39\n\t" \
"st.q r15, 160, r40\n\t" \
"st.q r15, 168, r41\n\t" \
"st.q r15, 176, r42\n\t" \
"st.q r15, 184, r43\n\t" \
"st.q r15, 192, r60\n\t" \
"st.q r15, 200, r61\n\t" \
"st.q r15, 208, r62\n\t" \
"gettr " __t0 ", r0\n\t" \
"st.q r15, 216, r0\n\t" \
"gettr " __t1 ", r1\n\t" \
"st.q r15, 224, r1\n\t" \
"gettr " __t2 ", r2\n\t" \
"st.q r15, 232, r2\n\t" \
"gettr " __t3 ", r3\n\t" \
"st.q r15, 240, r3\n\t" \
"gettr " __t4 ", r4\n\t" \
"st.q r15, 248, r4\n\t");
/* Note. Do not restore r42 ! */
#define RESTORE_CALLER_SAVED \
__asm__ __volatile__("ld.q r15, 216, r0\n\t" \
"ptabs r0, " __t0 "\n\t" \
"ld.q r15, 224, r1\n\t" \
"ptabs r1, " __t1 "\n\t" \
"ld.q r15, 232, r2\n\t" \
"ptabs r2, " __t2 "\n\t" \
"ld.q r15, 240, r3\n\t" \
"ptabs r3, " __t3 "\n\t" \
"ld.q r15, 248, r4\n\t" \
"ptabs r4, " __t4 "\n\t" \
"ld.q r15, 0, r0\n\t" \
"ld.q r15, 8, r1\n\t" \
"ld.q r15, 16, r2\n\t" \
"ld.q r15, 24, r3\n\t" \
"ld.q r15, 32, r4\n\t" \
"ld.q r15, 40, r5\n\t" \
"ld.q r15, 48, r6\n\t" \
"ld.q r15, 56, r7\n\t" \
"ld.q r15, 64, r8\n\t" \
"ld.q r15, 72, r9\n\t" \
"ld.q r15, 80, r17\n\t" \
"ld.q r15, 88, r19\n\t" \
"ld.q r15, 96, r20\n\t" \
"ld.q r15, 104, r21\n\t" \
"ld.q r15, 112, r22\n\t" \
"ld.q r15, 120, r23\n\t" \
"ld.q r15, 128, r36\n\t" \
"ld.q r15, 136, r37\n\t" \
"ld.q r15, 144, r38\n\t" \
"ld.q r15, 152, r39\n\t" \
"ld.q r15, 160, r40\n\t" \
"ld.q r15, 168, r41\n\t" \
"ld.q r15, 184, r43\n\t" \
"ld.q r15, 192, r60\n\t" \
"ld.q r15, 200, r61\n\t" \
"ld.q r15, 208, r62\n\t" \
"addi.l r15, 256, r15\n\t");
#endif
#define switch_to(prev,next,last) do { \
register unsigned long * r36 __asm__ ("r36"); \
register unsigned long * r37 __asm__ ("r37"); \
register unsigned long long r38 __asm__ ("r38"); \
register unsigned long long r39 __asm__ ("r39"); \
register unsigned long * r40 __asm__ ("r40"); \
register unsigned long * r41 __asm__ ("r41"); \
register struct task_struct * r42 __asm__ ("r42"); \
\
/* printk("switch_to prev %08x next %08x last %08x\n", prev, next,last); */ \
if (last_task_used_math != next) { \
struct pt_regs* regs; \
regs = next->thread.kregs; \
regs->sr |= SR_FD; \
} \
\
SAVE_CALLER_SAVED \
\
r36 = &prev->thread.sp; \
r37 = &prev->thread.pc; \
\
/* Note that we always are in kernel space */ \
r38 = next->thread.sp | NEFF_MASK; \
r39 = next->thread.pc | NEFF_MASK; \
\
r40 = (unsigned long *) prev; \
r41 = (unsigned long *) next; \
\
__asm__ __volatile__("addi.l r15, -304, r15\n\t" \
"st.q r15, 0, r10\n\t" \
"st.q r15, 8, r11\n\t" \
"st.q r15, 16, r12\n\t" \
"st.q r15, 24, r13\n\t" \
"st.q r15, 32, r14\n\t" \
"st.q r15, 40, r16\n\t" \
"st.q r15, 48, r18\n\t" \
"st.q r15, 56, r24\n\t" \
"st.q r15, 64, r25\n\t" \
"st.q r15, 72, r26\n\t" \
"st.q r15, 80, r27\n\t" \
"st.q r15, 88, r28\n\t" \
"st.q r15, 96, r29\n\t" \
"st.q r15, 104, r30\n\t" \
"st.q r15, 112, r31\n\t" \
"st.q r15, 120, r32\n\t" \
"st.q r15, 128, r33\n\t" \
"st.q r15, 136, r34\n\t" \
"st.q r15, 144, r35\n\t" \
"st.q r15, 152, r44\n\t" \
"st.q r15, 160, r45\n\t" \
"st.q r15, 168, r46\n\t" \
"st.q r15, 176, r47\n\t" \
"st.q r15, 184, r48\n\t" \
"st.q r15, 192, r49\n\t" \
"st.q r15, 200, r50\n\t" \
"st.q r15, 208, r51\n\t" \
"st.q r15, 216, r52\n\t" \
"st.q r15, 224, r53\n\t" \
"st.q r15, 232, r54\n\t" \
"st.q r15, 240, r55\n\t" \
"st.q r15, 248, r56\n\t" \
"st.q r15, 256, r57\n\t" \
"st.q r15, 264, r58\n\t" \
"st.q r15, 272, r59\n\t" \
"gettr " __t5 ", r55\n\t" \
"st.q r15, 280, r55\n\t" \
"gettr " __t6 ", r56\n\t" \
"st.q r15, 288, r56\n\t" \
"gettr " __t7 ", r57\n\t" \
"st.q r15, 296, r57\n\t" \
"_loada __switch_to, r18\n\t" \
"ptabs r18, " __t5 "\n\t" \
"_pta 36, " __t6 "\n\t" \
"gettr " __t6 ", r18\n\t" \
"st.l %1, 0, r15\n\t" \
"st.l %2, 0, r18\n\t" \
"or %3, r63, r15\n\t" \
"or %4, r63, r18\n\t" \
"or %5, r63, r2\n\t" \
"or %6, r63, r3\n\t" \
"blink " __t5 ", r63\n\t" \
"or r2, r63, %0\n\t" \
"ld.q r15, 280, r55\n\t" \
"ptabs r55, " __t5 "\n\t" \
"ld.q r15, 288, r56\n\t" \
"ptabs r56, " __t6 "\n\t" \
"ld.q r15, 296, r57\n\t" \
"ptabs r57, " __t7 "\n\t" \
"ld.q r15, 0, r10\n\t" \
"ld.q r15, 8, r11\n\t" \
"ld.q r15, 16, r12\n\t" \
"ld.q r15, 24, r13\n\t" \
"ld.q r15, 32, r14\n\t" \
"ld.q r15, 40, r16\n\t" \
"ld.q r15, 48, r18\n\t" \
"ld.q r15, 56, r24\n\t" \
"ld.q r15, 64, r25\n\t" \
"ld.q r15, 72, r26\n\t" \
"ld.q r15, 80, r27\n\t" \
"ld.q r15, 88, r28\n\t" \
"ld.q r15, 96, r29\n\t" \
"ld.q r15, 104, r30\n\t" \
"ld.q r15, 112, r31\n\t" \
"ld.q r15, 120, r32\n\t" \
"ld.q r15, 128, r33\n\t" \
"ld.q r15, 136, r34\n\t" \
"ld.q r15, 144, r35\n\t" \
"ld.q r15, 152, r44\n\t" \
"ld.q r15, 160, r45\n\t" \
"ld.q r15, 168, r46\n\t" \
"ld.q r15, 176, r47\n\t" \
"ld.q r15, 184, r48\n\t" \
"ld.q r15, 192, r49\n\t" \
"ld.q r15, 200, r50\n\t" \
"ld.q r15, 208, r51\n\t" \
"ld.q r15, 216, r52\n\t" \
"ld.q r15, 224, r53\n\t" \
"ld.q r15, 232, r54\n\t" \
"ld.q r15, 240, r55\n\t" \
"ld.q r15, 248, r56\n\t" \
"ld.q r15, 256, r57\n\t" \
"ld.q r15, 264, r58\n\t" \
"ld.q r15, 272, r59\n\t" \
"addi.l r15, 304, r15\n\t" \
: "=r" (r42) \
: "r" (r36), "r" (r37), "r" (r38), \
"r" (r39), "r" (r40), "r" (r41)); \
RESTORE_CALLER_SAVED \
last = r42; \
} while (0)
#endif
#define nop() __asm__ __volatile__ ("nop")
#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
#define tas(ptr) (xchg((ptr), 1))
extern void __xchg_called_with_bad_pointer(void);
#define mb() __asm__ __volatile__ ("synco": : :"memory")
#define rmb() mb()
#define wmb() __asm__ __volatile__ ("synco": : :"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)
/* Interrupt Control */
#ifndef HARD_CLI
#define SR_MASK_L 0x000000f0L
#define SR_MASK_LL 0x00000000000000f0LL
#else
#define SR_MASK_L 0x10000000L
#define SR_MASK_LL 0x0000000010000000LL
#endif
extern __inline__ void __sti(void)
{
/* cli/sti based on SR.BL */
unsigned long long __dummy0, __dummy1=~SR_MASK_LL;
__asm__ __volatile__("getcon " __c0 ", %0\n\t"
"and %0, %1, %0\n\t"
"putcon %0, " __c0 "\n\t"
: "=&r" (__dummy0)
: "r" (__dummy1));
}
extern __inline__ void __cli(void)
{
/* cli/sti based on SR.BL */
unsigned long long __dummy0, __dummy1=SR_MASK_LL;
__asm__ __volatile__("getcon " __c0 ", %0\n\t"
"or %0, %1, %0\n\t"
"putcon %0, " __c0 "\n\t"
: "=&r" (__dummy0)
: "r" (__dummy1));
}
#define __save_flags(x) \
(__extension__ ({ unsigned long long __dummy=SR_MASK_LL; \
__asm__ __volatile__( \
"getcon " __c0 ", %0\n\t" \
"and %0, %1, %0" \
: "=&r" (x) \
: "r" (__dummy));}))
#define __save_and_cli(x) \
(__extension__ ({ unsigned long long __d2=SR_MASK_LL, __d1; \
__asm__ __volatile__( \
"getcon " __c0 ", %1\n\t" \
"or %1, r63, %0\n\t" \
"or %1, %2, %1\n\t" \
"putcon %1, " __c0 "\n\t" \
"and %0, %2, %0" \
: "=&r" (x), "=&r" (__d1) \
: "r" (__d2));}));
#define __restore_flags(x) do { \
if ( ((x) & SR_MASK_L) == 0 ) /* dropping to 0 ? */ \
__sti(); /* yes...re-enable */ \
} while (0)
#define __save_and_sti(x) do { __save_flags(x); __sti(); } while (0)
/* For spinlocks etc */
#define local_irq_save(x) __save_and_cli(x)
#define local_irq_set(x) __save_and_sti(x)
#define local_irq_restore(x) __restore_flags(x)
#define local_irq_disable() __cli()
#define local_irq_enable() __sti()
#ifdef CONFIG_SMP
extern void __global_cli(void);
extern void __global_sti(void);
extern unsigned long __global_save_flags(void);
extern void __global_restore_flags(unsigned long);
#define cli() __global_cli()
#define sti() __global_sti()
#define save_flags(x) ((x)=__global_save_flags())
#define restore_flags(x) __global_restore_flags(x)
#define save_and_sti(x) do { save_flags(x); sti(x); } while (0)
#else
#define cli() __cli()
#define sti() __sti()
#define save_flags(x) __save_flags(x)
#define save_and_cli(x) __save_and_cli(x)
#define restore_flags(x) __restore_flags(x)
#define save_and_sti(x) __save_and_sti(x)
#endif
extern __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val)
{
unsigned long flags, retval;
save_and_cli(flags);
retval = *m;
*m = val;
restore_flags(flags);
return retval;
}
extern __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)
{
unsigned long flags, retval;
save_and_cli(flags);
retval = *m;
*m = val & 0xff;
restore_flags(flags);
return retval;
}
static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
{
switch (size) {
case 4:
return xchg_u32(ptr, x);
break;
case 1:
return xchg_u8(ptr, x);
break;
}
__xchg_called_with_bad_pointer();
return x;
}
/* XXX
* disable hlt during certain critical i/o operations
*/
#define HAVE_DISABLE_HLT
void disable_hlt(void);
void enable_hlt(void);
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
extern void print_seg(char *file,int line);
#define PLS() print_seg(__FILE__,__LINE__)
#define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__)
#endif /* __ASM_SH64_SYSTEM_H */
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