mirror of https://gitee.com/openkylin/linux.git
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Copyright (C) 2002-2004 Silicon Graphics, Inc. All Rights Reserved.
|
|
*/
|
|
#ifndef _ASM_IA64_SN_RW_MMR_H
|
|
#define _ASM_IA64_SN_RW_MMR_H
|
|
|
|
|
|
/*
|
|
* This file contains macros used to access MMR registers via
|
|
* uncached physical addresses.
|
|
* pio_phys_read_mmr - read an MMR
|
|
* pio_phys_write_mmr - write an MMR
|
|
* pio_atomic_phys_write_mmrs - atomically write 1 or 2 MMRs with psr.ic=0
|
|
* Second MMR will be skipped if address is NULL
|
|
*
|
|
* Addresses passed to these routines should be uncached physical addresses
|
|
* ie., 0x80000....
|
|
*/
|
|
|
|
|
|
extern inline long
|
|
pio_phys_read_mmr(volatile long *mmr)
|
|
{
|
|
long val;
|
|
asm volatile
|
|
("mov r2=psr;;"
|
|
"rsm psr.i | psr.dt;;"
|
|
"srlz.i;;"
|
|
"ld8.acq %0=[%1];;"
|
|
"mov psr.l=r2;;"
|
|
"srlz.i;;"
|
|
: "=r"(val)
|
|
: "r"(mmr)
|
|
: "r2");
|
|
return val;
|
|
}
|
|
|
|
|
|
|
|
extern inline void
|
|
pio_phys_write_mmr(volatile long *mmr, long val)
|
|
{
|
|
asm volatile
|
|
("mov r2=psr;;"
|
|
"rsm psr.i | psr.dt;;"
|
|
"srlz.i;;"
|
|
"st8.rel [%0]=%1;;"
|
|
"mov psr.l=r2;;"
|
|
"srlz.i;;"
|
|
:: "r"(mmr), "r"(val)
|
|
: "r2", "memory");
|
|
}
|
|
|
|
extern inline void
|
|
pio_atomic_phys_write_mmrs(volatile long *mmr1, long val1, volatile long *mmr2, long val2)
|
|
{
|
|
asm volatile
|
|
("mov r2=psr;;"
|
|
"rsm psr.i | psr.dt | psr.ic;;"
|
|
"cmp.ne p9,p0=%2,r0;"
|
|
"srlz.i;;"
|
|
"st8.rel [%0]=%1;"
|
|
"(p9) st8.rel [%2]=%3;;"
|
|
"mov psr.l=r2;;"
|
|
"srlz.i;;"
|
|
:: "r"(mmr1), "r"(val1), "r"(mmr2), "r"(val2)
|
|
: "p9", "r2", "memory");
|
|
}
|
|
|
|
#endif /* _ASM_IA64_SN_RW_MMR_H */
|