forked from luck/tmp_suning_uos_patched
dcc1dd2366
Rewrite the SN pio_phys_xxx macros in assembly language. This avoids issues with the Intel icc compiler. Function call overhead is not an issue - the functions reference PIOs and take 100's nsec to complete. In addition, the functions should likely be in assembly language anyway - they reference memory using physical addressing mode. One function executes with psr.ic disabled. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
72 lines
1.4 KiB
ArmAsm
72 lines
1.4 KiB
ArmAsm
/*
|
|
* 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) 2000-2005 Silicon Graphics, Inc. All rights reserved.
|
|
*
|
|
* 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....
|
|
*/
|
|
|
|
|
|
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/page.h>
|
|
|
|
GLOBAL_ENTRY(pio_phys_read_mmr)
|
|
.prologue
|
|
.regstk 1,0,0,0
|
|
.body
|
|
mov r2=psr
|
|
rsm psr.i | psr.dt
|
|
;;
|
|
srlz.d
|
|
ld8.acq r8=[r32]
|
|
;;
|
|
mov psr.l=r2;;
|
|
srlz.d
|
|
br.ret.sptk.many rp
|
|
END(pio_phys_read_mmr)
|
|
|
|
GLOBAL_ENTRY(pio_phys_write_mmr)
|
|
.prologue
|
|
.regstk 2,0,0,0
|
|
.body
|
|
mov r2=psr
|
|
rsm psr.i | psr.dt
|
|
;;
|
|
srlz.d
|
|
st8.rel [r32]=r33
|
|
;;
|
|
mov psr.l=r2;;
|
|
srlz.d
|
|
br.ret.sptk.many rp
|
|
END(pio_phys_write_mmr)
|
|
|
|
GLOBAL_ENTRY(pio_atomic_phys_write_mmrs)
|
|
.prologue
|
|
.regstk 4,0,0,0
|
|
.body
|
|
mov r2=psr
|
|
cmp.ne p9,p0=r34,r0;
|
|
rsm psr.i | psr.dt | psr.ic
|
|
;;
|
|
srlz.d
|
|
st8.rel [r32]=r33
|
|
(p9) st8.rel [r34]=r35
|
|
;;
|
|
mov psr.l=r2;;
|
|
srlz.d
|
|
br.ret.sptk.many rp
|
|
END(pio_atomic_phys_write_mmrs)
|
|
|
|
|