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2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
41 lines
986 B
ArmAsm
41 lines
986 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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ld r4,bhrb_table@got(r2)
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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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