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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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>
70 lines
1.4 KiB
ArmAsm
70 lines
1.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* This file contains low level CPU setup functions.
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* Valentine Barshak <vbarshak@ru.mvista.com>
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* MontaVista Software, Inc (c) 2007
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*
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* Based on cpu_setup_6xx code by
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* Benjamin Herrenschmidt <benh@kernel.crashing.org>
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*/
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#include <asm/processor.h>
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#include <asm/cputable.h>
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#include <asm/ppc_asm.h>
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_GLOBAL(__setup_cpu_440ep)
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b __init_fpu_44x
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_GLOBAL(__setup_cpu_440epx)
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mflr r4
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bl __init_fpu_44x
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bl __plb_disable_wrp
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bl __fixup_440A_mcheck
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mtlr r4
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blr
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_GLOBAL(__setup_cpu_440grx)
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mflr r4
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bl __plb_disable_wrp
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bl __fixup_440A_mcheck
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mtlr r4
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blr
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_GLOBAL(__setup_cpu_460ex)
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_GLOBAL(__setup_cpu_460gt)
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_GLOBAL(__setup_cpu_460sx)
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_GLOBAL(__setup_cpu_apm821xx)
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mflr r4
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bl __init_fpu_44x
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bl __fixup_440A_mcheck
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mtlr r4
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blr
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_GLOBAL(__setup_cpu_440x5)
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_GLOBAL(__setup_cpu_440gx)
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_GLOBAL(__setup_cpu_440spe)
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b __fixup_440A_mcheck
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/* enable APU between CPU and FPU */
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_GLOBAL(__init_fpu_44x)
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mfspr r3,SPRN_CCR0
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/* Clear DAPUIB flag in CCR0 */
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rlwinm r3,r3,0,12,10
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mtspr SPRN_CCR0,r3
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isync
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blr
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/*
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* Workaround for the incorrect write to DDR SDRAM errata.
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* The write address can be corrupted during writes to
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* DDR SDRAM when write pipelining is enabled on PLB0.
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* Disable write pipelining here.
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*/
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#define DCRN_PLB4A0_ACR 0x81
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_GLOBAL(__plb_disable_wrp)
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mfdcr r3,DCRN_PLB4A0_ACR
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/* clear WRP bit in PLB4A0_ACR */
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rlwinm r3,r3,0,8,6
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mtdcr DCRN_PLB4A0_ACR,r3
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isync
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blr
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