Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
41 lines
991 B
ArmAsm
41 lines
991 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Basic assembly code to read BHRB entries
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*
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* Copyright 2013 Anshuman Khandual, IBM Corporation.
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*/
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#include <asm/ppc_asm.h>
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#include <asm/ppc-opcode.h>
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.text
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.balign 8
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/* r3 = n (where n = [0-31])
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* The maximum number of BHRB entries supported with PPC_MFBHRBE instruction
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* is 1024. We have limited number of table entries here as POWER8 implements
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* 32 BHRB entries.
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*/
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/* .global read_bhrb */
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_GLOBAL(read_bhrb)
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cmpldi r3,31
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bgt 1f
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LOAD_REG_ADDR(r4, bhrb_table)
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sldi r3,r3,3
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add r3,r4,r3
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mtctr r3
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bctr
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1: li r3,0
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blr
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#define MFBHRB_TABLE1(n) PPC_MFBHRBE(R3,n); blr
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#define MFBHRB_TABLE2(n) MFBHRB_TABLE1(n); MFBHRB_TABLE1(n+1)
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#define MFBHRB_TABLE4(n) MFBHRB_TABLE2(n); MFBHRB_TABLE2(n+2)
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#define MFBHRB_TABLE8(n) MFBHRB_TABLE4(n); MFBHRB_TABLE4(n+4)
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#define MFBHRB_TABLE16(n) MFBHRB_TABLE8(n); MFBHRB_TABLE8(n+8)
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#define MFBHRB_TABLE32(n) MFBHRB_TABLE16(n); MFBHRB_TABLE16(n+16)
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bhrb_table:
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MFBHRB_TABLE32(0)
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