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| Current File : //usr/src/sys/sparc64/include/cpufunc.h |
/*-
* Copyright (c) 2001 Jake Burkholder.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/sparc64/include/cpufunc.h 220939 2011-04-22 09:31:40Z marius $
*/
#ifndef _MACHINE_CPUFUNC_H_
#define _MACHINE_CPUFUNC_H_
#include <machine/asi.h>
#include <machine/pstate.h>
struct thread;
/*
* Membar operand macros for use in other macros when # is a special
* character. Keep these in sync with what the hardware expects.
*/
#define C_Lookaside (0)
#define C_MemIssue (1)
#define C_Sync (2)
#define M_LoadLoad (0)
#define M_StoreLoad (1)
#define M_LoadStore (2)
#define M_StoreStore (3)
#define CMASK_SHIFT (4)
#define MMASK_SHIFT (0)
#define CMASK_GEN(bit) ((1 << (bit)) << CMASK_SHIFT)
#define MMASK_GEN(bit) ((1 << (bit)) << MMASK_SHIFT)
#define Lookaside CMASK_GEN(C_Lookaside)
#define MemIssue CMASK_GEN(C_MemIssue)
#define Sync CMASK_GEN(C_Sync)
#define LoadLoad MMASK_GEN(M_LoadLoad)
#define StoreLoad MMASK_GEN(M_StoreLoad)
#define LoadStore MMASK_GEN(M_LoadStore)
#define StoreStore MMASK_GEN(M_StoreStore)
#define casa(rs1, rs2, rd, asi) ({ \
u_int __rd = (uint32_t)(rd); \
__asm __volatile("casa [%2] %3, %4, %0" \
: "+r" (__rd), "=m" (*rs1) \
: "r" (rs1), "n" (asi), "r" (rs2), "m" (*rs1)); \
__rd; \
})
#define casxa(rs1, rs2, rd, asi) ({ \
u_long __rd = (uint64_t)(rd); \
__asm __volatile("casxa [%2] %3, %4, %0" \
: "+r" (__rd), "=m" (*rs1) \
: "r" (rs1), "n" (asi), "r" (rs2), "m" (*rs1)); \
__rd; \
})
#define flush(va) do { \
__asm __volatile("flush %0" : : "r" (va)); \
} while (0)
#define flushw() do { \
__asm __volatile("flushw" : :); \
} while (0)
#define mov(val, reg) do { \
__asm __volatile("mov %0, %" __XSTRING(reg) : : "r" (val)); \
} while (0)
/* Generate ld*a/st*a functions for non-constant ASIs. */
#define LDNC_GEN(tp, o) \
static __inline tp \
o ## _nc(caddr_t va, int asi) \
{ \
tp r; \
__asm __volatile("wr %2, 0, %%asi;" #o " [%1] %%asi, %0"\
: "=r" (r) : "r" (va), "r" (asi)); \
return (r); \
}
LDNC_GEN(u_char, lduba);
LDNC_GEN(u_short, lduha);
LDNC_GEN(u_int, lduwa);
LDNC_GEN(u_long, ldxa);
#define LD_GENERIC(va, asi, op, type) ({ \
type __r; \
__asm __volatile(#op " [%1] %2, %0" \
: "=r" (__r) : "r" (va), "n" (asi)); \
__r; \
})
#define lduba(va, asi) LD_GENERIC(va, asi, lduba, u_char)
#define lduha(va, asi) LD_GENERIC(va, asi, lduha, u_short)
#define lduwa(va, asi) LD_GENERIC(va, asi, lduwa, u_int)
#define ldxa(va, asi) LD_GENERIC(va, asi, ldxa, u_long)
#define STNC_GEN(tp, o) \
static __inline void \
o ## _nc(caddr_t va, int asi, tp val) \
{ \
__asm __volatile("wr %2, 0, %%asi;" #o " %0, [%1] %%asi"\
: : "r" (val), "r" (va), "r" (asi)); \
}
STNC_GEN(u_char, stba);
STNC_GEN(u_short, stha);
STNC_GEN(u_int, stwa);
STNC_GEN(u_long, stxa);
#define ST_GENERIC(va, asi, val, op) \
__asm __volatile(#op " %0, [%1] %2" \
: : "r" (val), "r" (va), "n" (asi)); \
#define stba(va, asi, val) ST_GENERIC(va, asi, val, stba)
#define stha(va, asi, val) ST_GENERIC(va, asi, val, stha)
#define stwa(va, asi, val) ST_GENERIC(va, asi, val, stwa)
#define stxa(va, asi, val) ST_GENERIC(va, asi, val, stxa)
/*
* Attempt to read from addr, val. If a Data Access Error trap happens,
* they return -1 and the contents of val is undefined. A return of 0
* means no trap happened, and the contents of val is valid.
*/
int fasword8(u_long asi, void *addr, uint8_t *val);
int fasword16(u_long asi, void *addr, uint16_t *val);
int fasword32(u_long asi, void *addr, uint32_t *val);
#define membar(mask) do { \
__asm __volatile("membar %0" : : "n" (mask) : "memory"); \
} while (0)
#define rd(name) ({ \
uint64_t __sr; \
__asm __volatile("rd %%" #name ", %0" : "=r" (__sr) :); \
__sr; \
})
#define wr(name, val, xorval) do { \
__asm __volatile("wr %0, %1, %%" #name \
: : "r" (val), "rI" (xorval)); \
} while (0)
#define rdpr(name) ({ \
uint64_t __pr; \
__asm __volatile("rdpr %%" #name", %0" : "=r" (__pr) :); \
__pr; \
})
#define wrpr(name, val, xorval) do { \
__asm __volatile("wrpr %0, %1, %%" #name \
: : "r" (val), "rI" (xorval)); \
} while (0)
/*
* Trick GAS/GCC into compiling access to TICK/(S)TICK_COMPARE independently
* of the selected instruction set.
*/
#define rdtickcmpr() rd(asr23)
#define rdstick() rd(asr24)
#define rdstickcmpr() rd(asr25)
#define wrtickcmpr(val, xorval) wr(asr23, (val), (xorval))
#define wrstick(val, xorval) wr(asr24, (val), (xorval))
#define wrstickcmpr(val, xorval) wr(asr25, (val), (xorval))
/*
* Macro intended to be used instead of wr(asr23, val, xorval) for writing to
* the TICK_COMPARE register in order to avoid a bug in BlackBird CPUs that
* can cause these writes to fail under certain conditions which in turn
* causes the hardclock to stop. The workaround is to read the TICK_COMPARE
* register back immediately after writing to it with these two instructions
* aligned to a quadword boundary in order to ensure that I$ misses won't
* split them up.
*/
#define wrtickcmpr_bbwar(val, xorval) ({ \
__asm __volatile( \
" ba,pt %%xcc, 1f ; " \
" nop ; " \
" .align 128 ; " \
"1: wr %0, %1, %%asr23 ; " \
" rd %%asr23, %%g0 ; " \
: : "r" (val), "rI" (xorval)); \
})
static __inline void
breakpoint(void)
{
__asm __volatile("ta %%xcc, 1" : :);
}
static __inline register_t
intr_disable(void)
{
register_t s;
s = rdpr(pstate);
wrpr(pstate, s & ~PSTATE_IE, 0);
return (s);
}
#define intr_restore(s) wrpr(pstate, (s), 0)
/*
* In some places, it is required that the store is directly followed by a
* membar #Sync. Don't trust the compiler to not insert instructions in
* between. We also need to disable interrupts completely.
*/
#define stxa_sync(va, asi, val) do { \
register_t s; \
s = intr_disable(); \
__asm __volatile("stxa %0, [%1] %2; membar #Sync" \
: : "r" (val), "r" (va), "n" (asi)); \
intr_restore(s); \
} while (0)
void ascopy(u_long asi, vm_offset_t src, vm_offset_t dst, size_t len);
void ascopyfrom(u_long sasi, vm_offset_t src, caddr_t dst, size_t len);
void ascopyto(caddr_t src, u_long dasi, vm_offset_t dst, size_t len);
void aszero(u_long asi, vm_offset_t dst, size_t len);
/*
* Ultrasparc II doesn't implement popc in hardware.
*/
#if 0
#define HAVE_INLINE_FFS
/*
* See page 202 of the SPARC v9 Architecture Manual.
*/
static __inline int
ffs(int mask)
{
int result;
int neg;
int tmp;
__asm __volatile(
" neg %3, %1 ; "
" xnor %3, %1, %2 ; "
" popc %2, %0 ; "
" movrz %3, %%g0, %0 ; "
: "=r" (result), "=r" (neg), "=r" (tmp) : "r" (mask));
return (result);
}
#endif
#undef LDNC_GEN
#undef STNC_GEN
#endif /* !_MACHINE_CPUFUNC_H_ */