mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 00:56:44 +07:00
45 lines
1.2 KiB
ArmAsm
45 lines
1.2 KiB
ArmAsm
|
/*
|
||
|
|
* Basic assembly code to read BHRB entries
|
||
|
|
*
|
||
|
|
* Copyright 2013 Anshuman Khandual, IBM Corporation.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
#include <asm/ppc_asm.h>
|
||
|
|
#include <asm/ppc-opcode.h>
|
||
|
|
|
||
|
|
.text
|
||
|
|
|
||
|
|
.balign 8
|
||
|
|
|
||
|
|
/* r3 = n (where n = [0-31])
|
||
|
|
* The maximum number of BHRB entries supported with PPC_MFBHRBE instruction
|
||
|
|
* is 1024. We have limited number of table entries here as POWER8 implements
|
||
|
|
* 32 BHRB entries.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* .global read_bhrb */
|
||
|
|
_GLOBAL(read_bhrb)
|
||
|
|
cmpldi r3,31
|
||
|
|
bgt 1f
|
||
|
|
ld r4,bhrb_table@got(r2)
|
||
|
|
sldi r3,r3,3
|
||
|
|
add r3,r4,r3
|
||
|
|
mtctr r3
|
||
|
|
bctr
|
||
|
|
1: li r3,0
|
||
|
|
blr
|
||
|
|
|
||
|
|
#define MFBHRB_TABLE1(n) PPC_MFBHRBE(R3,n); blr
|
||
|
|
#define MFBHRB_TABLE2(n) MFBHRB_TABLE1(n); MFBHRB_TABLE1(n+1)
|
||
|
|
#define MFBHRB_TABLE4(n) MFBHRB_TABLE2(n); MFBHRB_TABLE2(n+2)
|
||
|
|
#define MFBHRB_TABLE8(n) MFBHRB_TABLE4(n); MFBHRB_TABLE4(n+4)
|
||
|
|
#define MFBHRB_TABLE16(n) MFBHRB_TABLE8(n); MFBHRB_TABLE8(n+8)
|
||
|
|
#define MFBHRB_TABLE32(n) MFBHRB_TABLE16(n); MFBHRB_TABLE16(n+16)
|
||
|
|
|
||
|
|
bhrb_table:
|
||
|
|
MFBHRB_TABLE32(0)
|