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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PARISC_SPECIAL_INSNS_H
#define __PARISC_SPECIAL_INSNS_H
#define lpa(va) ({ \
unsigned long pa; \
__asm__ __volatile__( \
"copy %%r0,%0\n" \
"8:\tlpa %%r0(%1),%0\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY(8b, 9b, \
"or %%r0,%%r0,%%r0") \
: "=&r" (pa) \
: "r" (va) \
: "memory" \
); \
pa; \
})
#define lpa_user(va) ({ \
unsigned long pa; \
__asm__ __volatile__( \
"copy %%r0,%0\n" \
"8:\tlpa %%r0(%%sr3,%1),%0\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY(8b, 9b, \
"or %%r0,%%r0,%%r0") \
: "=&r" (pa) \
: "r" (va) \
: "memory" \
); \
pa; \
})
/**
* prober_user() - Probe user read access
* @sr: Space regster.
* @va: Virtual address.
*
* Return: Non-zero if address is accessible.
*
* Due to the way _PAGE_READ is handled in TLB entries, we need
* a special check to determine whether a user address is accessible.
* The ldb instruction does the initial access check. If it is
* successful, the probe instruction checks user access rights.
*/
#define prober_user(sr, va) ({ \
unsigned long read_allowed; \
__asm__ __volatile__( \
"copy %%r0,%0\n" \
"8:\tldb 0(%%sr%1,%2),%%r0\n" \
"\tproberi (%%sr%1,%2),%3,%0\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY(8b, 9b, \
"or %%r0,%%r0,%%r0") \
: "=&r" (read_allowed) \
: "i" (sr), "r" (va), "i" (PRIV_USER) \
: "memory" \
); \
read_allowed; \
})
#define CR_EIEM 15 /* External Interrupt Enable Mask */
#define CR_CR16 16 /* CR16 Interval Timer */
#define CR_EIRR 23 /* External Interrupt Request Register */
#define mfctl(reg) ({ \
unsigned long cr; \
__asm__ __volatile__( \
"mfctl %1,%0" : \
"=r" (cr) : "i" (reg) \
); \
cr; \
})
#define mtctl(gr, cr) \
__asm__ __volatile__("mtctl %0,%1" \
: /* no outputs */ \
: "r" (gr), "i" (cr) : "memory")
#define get_eiem() mfctl(CR_EIEM)
#define set_eiem(val) mtctl(val, CR_EIEM)
#define mfsp(reg) ({ \
unsigned long cr; \
__asm__ __volatile__( \
"mfsp %%sr%1,%0" \
: "=r" (cr) : "i"(reg) \
); \
cr; \
})
#define mtsp(val, cr) \
{ if (__builtin_constant_p(val) && ((val) == 0)) \
__asm__ __volatile__("mtsp %%r0,%0" : : "i" (cr) : "memory"); \
else \
__asm__ __volatile__("mtsp %0,%1" \
: /* no outputs */ \
: "r" (val), "i" (cr) : "memory"); }
#endif /* __PARISC_SPECIAL_INSNS_H */
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