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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>
630 lines
12 KiB
ArmAsm
630 lines
12 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2013 Imagination Technologies
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* Author: Paul Burton <paul.burton@mips.com>
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*/
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#include <asm/addrspace.h>
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#include <asm/asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/asmmacro.h>
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#include <asm/cacheops.h>
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#include <asm/eva.h>
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#include <asm/mipsregs.h>
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#include <asm/mipsmtregs.h>
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#include <asm/pm.h>
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#define GCR_CPC_BASE_OFS 0x0088
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#define GCR_CL_COHERENCE_OFS 0x2008
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#define GCR_CL_ID_OFS 0x2028
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#define CPC_CL_VC_STOP_OFS 0x2020
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#define CPC_CL_VC_RUN_OFS 0x2028
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.extern mips_cm_base
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.set noreorder
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#ifdef CONFIG_64BIT
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# define STATUS_BITDEPS ST0_KX
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#else
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# define STATUS_BITDEPS 0
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#endif
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#ifdef CONFIG_MIPS_CPS_NS16550
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#define DUMP_EXCEP(name) \
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PTR_LA a0, 8f; \
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jal mips_cps_bev_dump; \
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nop; \
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TEXT(name)
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#else /* !CONFIG_MIPS_CPS_NS16550 */
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#define DUMP_EXCEP(name)
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#endif /* !CONFIG_MIPS_CPS_NS16550 */
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/*
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* Set dest to non-zero if the core supports the MT ASE, else zero. If
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* MT is not supported then branch to nomt.
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*/
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.macro has_mt dest, nomt
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mfc0 \dest, CP0_CONFIG, 1
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bgez \dest, \nomt
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mfc0 \dest, CP0_CONFIG, 2
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bgez \dest, \nomt
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mfc0 \dest, CP0_CONFIG, 3
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andi \dest, \dest, MIPS_CONF3_MT
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beqz \dest, \nomt
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nop
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.endm
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/*
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* Set dest to non-zero if the core supports MIPSr6 multithreading
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* (ie. VPs), else zero. If MIPSr6 multithreading is not supported then
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* branch to nomt.
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*/
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.macro has_vp dest, nomt
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mfc0 \dest, CP0_CONFIG, 1
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bgez \dest, \nomt
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mfc0 \dest, CP0_CONFIG, 2
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bgez \dest, \nomt
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mfc0 \dest, CP0_CONFIG, 3
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bgez \dest, \nomt
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mfc0 \dest, CP0_CONFIG, 4
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bgez \dest, \nomt
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mfc0 \dest, CP0_CONFIG, 5
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andi \dest, \dest, MIPS_CONF5_VP
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beqz \dest, \nomt
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nop
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.endm
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/* Calculate an uncached address for the CM GCRs */
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.macro cmgcrb dest
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.set push
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.set noat
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MFC0 $1, CP0_CMGCRBASE
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PTR_SLL $1, $1, 4
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PTR_LI \dest, UNCAC_BASE
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PTR_ADDU \dest, \dest, $1
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.set pop
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.endm
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.section .text.cps-vec
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.balign 0x1000
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LEAF(mips_cps_core_entry)
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/*
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* These first 4 bytes will be patched by cps_smp_setup to load the
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* CCA to use into register s0.
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*/
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.word 0
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/* Check whether we're here due to an NMI */
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mfc0 k0, CP0_STATUS
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and k0, k0, ST0_NMI
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beqz k0, not_nmi
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nop
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/* This is an NMI */
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PTR_LA k0, nmi_handler
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jr k0
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nop
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not_nmi:
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/* Setup Cause */
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li t0, CAUSEF_IV
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mtc0 t0, CP0_CAUSE
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/* Setup Status */
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li t0, ST0_CU1 | ST0_CU0 | ST0_BEV | STATUS_BITDEPS
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mtc0 t0, CP0_STATUS
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/* Skip cache & coherence setup if we're already coherent */
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cmgcrb v1
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lw s7, GCR_CL_COHERENCE_OFS(v1)
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bnez s7, 1f
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nop
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/* Initialize the L1 caches */
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jal mips_cps_cache_init
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nop
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/* Enter the coherent domain */
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li t0, 0xff
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sw t0, GCR_CL_COHERENCE_OFS(v1)
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ehb
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/* Set Kseg0 CCA to that in s0 */
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1: mfc0 t0, CP0_CONFIG
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ori t0, 0x7
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xori t0, 0x7
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or t0, t0, s0
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mtc0 t0, CP0_CONFIG
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ehb
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/* Jump to kseg0 */
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PTR_LA t0, 1f
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jr t0
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nop
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/*
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* We're up, cached & coherent. Perform any EVA initialization necessary
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* before we access memory.
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*/
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1: eva_init
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/* Retrieve boot configuration pointers */
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jal mips_cps_get_bootcfg
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nop
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/* Skip core-level init if we started up coherent */
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bnez s7, 1f
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nop
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/* Perform any further required core-level initialisation */
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jal mips_cps_core_init
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nop
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/*
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* Boot any other VPEs within this core that should be online, and
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* deactivate this VPE if it should be offline.
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*/
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move a1, t9
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jal mips_cps_boot_vpes
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move a0, v0
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/* Off we go! */
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1: PTR_L t1, VPEBOOTCFG_PC(v1)
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PTR_L gp, VPEBOOTCFG_GP(v1)
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PTR_L sp, VPEBOOTCFG_SP(v1)
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jr t1
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nop
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END(mips_cps_core_entry)
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.org 0x200
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LEAF(excep_tlbfill)
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DUMP_EXCEP("TLB Fill")
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b .
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nop
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END(excep_tlbfill)
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.org 0x280
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LEAF(excep_xtlbfill)
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DUMP_EXCEP("XTLB Fill")
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b .
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nop
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END(excep_xtlbfill)
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.org 0x300
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LEAF(excep_cache)
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DUMP_EXCEP("Cache")
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b .
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nop
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END(excep_cache)
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.org 0x380
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LEAF(excep_genex)
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DUMP_EXCEP("General")
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b .
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nop
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END(excep_genex)
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.org 0x400
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LEAF(excep_intex)
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DUMP_EXCEP("Interrupt")
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b .
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nop
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END(excep_intex)
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.org 0x480
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LEAF(excep_ejtag)
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PTR_LA k0, ejtag_debug_handler
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jr k0
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nop
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END(excep_ejtag)
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LEAF(mips_cps_core_init)
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#ifdef CONFIG_MIPS_MT_SMP
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/* Check that the core implements the MT ASE */
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has_mt t0, 3f
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.set push
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.set MIPS_ISA_LEVEL_RAW
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.set mt
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/* Only allow 1 TC per VPE to execute... */
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dmt
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/* ...and for the moment only 1 VPE */
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dvpe
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PTR_LA t1, 1f
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jr.hb t1
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nop
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/* Enter VPE configuration state */
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1: mfc0 t0, CP0_MVPCONTROL
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ori t0, t0, MVPCONTROL_VPC
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mtc0 t0, CP0_MVPCONTROL
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/* Retrieve the number of VPEs within the core */
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mfc0 t0, CP0_MVPCONF0
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srl t0, t0, MVPCONF0_PVPE_SHIFT
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andi t0, t0, (MVPCONF0_PVPE >> MVPCONF0_PVPE_SHIFT)
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addiu ta3, t0, 1
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/* If there's only 1, we're done */
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beqz t0, 2f
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nop
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/* Loop through each VPE within this core */
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li ta1, 1
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1: /* Operate on the appropriate TC */
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mtc0 ta1, CP0_VPECONTROL
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ehb
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/* Bind TC to VPE (1:1 TC:VPE mapping) */
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mttc0 ta1, CP0_TCBIND
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/* Set exclusive TC, non-active, master */
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li t0, VPECONF0_MVP
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sll t1, ta1, VPECONF0_XTC_SHIFT
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or t0, t0, t1
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mttc0 t0, CP0_VPECONF0
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/* Set TC non-active, non-allocatable */
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mttc0 zero, CP0_TCSTATUS
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/* Set TC halted */
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li t0, TCHALT_H
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mttc0 t0, CP0_TCHALT
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/* Next VPE */
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addiu ta1, ta1, 1
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slt t0, ta1, ta3
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bnez t0, 1b
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nop
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/* Leave VPE configuration state */
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2: mfc0 t0, CP0_MVPCONTROL
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xori t0, t0, MVPCONTROL_VPC
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mtc0 t0, CP0_MVPCONTROL
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3: .set pop
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#endif
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jr ra
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nop
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END(mips_cps_core_init)
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/**
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* mips_cps_get_bootcfg() - retrieve boot configuration pointers
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*
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* Returns: pointer to struct core_boot_config in v0, pointer to
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* struct vpe_boot_config in v1, VPE ID in t9
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*/
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LEAF(mips_cps_get_bootcfg)
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/* Calculate a pointer to this cores struct core_boot_config */
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cmgcrb t0
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lw t0, GCR_CL_ID_OFS(t0)
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li t1, COREBOOTCFG_SIZE
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mul t0, t0, t1
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PTR_LA t1, mips_cps_core_bootcfg
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PTR_L t1, 0(t1)
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PTR_ADDU v0, t0, t1
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/* Calculate this VPEs ID. If the core doesn't support MT use 0 */
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li t9, 0
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#if defined(CONFIG_CPU_MIPSR6)
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has_vp ta2, 1f
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/*
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* Assume non-contiguous numbering. Perhaps some day we'll need
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* to handle contiguous VP numbering, but no such systems yet
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* exist.
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*/
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mfc0 t9, CP0_GLOBALNUMBER
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andi t9, t9, MIPS_GLOBALNUMBER_VP
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#elif defined(CONFIG_MIPS_MT_SMP)
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has_mt ta2, 1f
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/* Find the number of VPEs present in the core */
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mfc0 t1, CP0_MVPCONF0
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srl t1, t1, MVPCONF0_PVPE_SHIFT
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andi t1, t1, MVPCONF0_PVPE >> MVPCONF0_PVPE_SHIFT
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addiu t1, t1, 1
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/* Calculate a mask for the VPE ID from EBase.CPUNum */
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clz t1, t1
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li t2, 31
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subu t1, t2, t1
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li t2, 1
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sll t1, t2, t1
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addiu t1, t1, -1
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/* Retrieve the VPE ID from EBase.CPUNum */
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mfc0 t9, $15, 1
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and t9, t9, t1
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#endif
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1: /* Calculate a pointer to this VPEs struct vpe_boot_config */
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li t1, VPEBOOTCFG_SIZE
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mul v1, t9, t1
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PTR_L ta3, COREBOOTCFG_VPECONFIG(v0)
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PTR_ADDU v1, v1, ta3
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jr ra
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nop
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END(mips_cps_get_bootcfg)
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LEAF(mips_cps_boot_vpes)
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lw ta2, COREBOOTCFG_VPEMASK(a0)
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PTR_L ta3, COREBOOTCFG_VPECONFIG(a0)
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#if defined(CONFIG_CPU_MIPSR6)
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has_vp t0, 5f
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/* Find base address of CPC */
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cmgcrb t3
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PTR_L t1, GCR_CPC_BASE_OFS(t3)
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PTR_LI t2, ~0x7fff
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and t1, t1, t2
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PTR_LI t2, UNCAC_BASE
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PTR_ADD t1, t1, t2
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/* Start any other VPs that ought to be running */
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PTR_S ta2, CPC_CL_VC_RUN_OFS(t1)
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/* Ensure this VP stops running if it shouldn't be */
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not ta2
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PTR_S ta2, CPC_CL_VC_STOP_OFS(t1)
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ehb
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#elif defined(CONFIG_MIPS_MT)
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/* If the core doesn't support MT then return */
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has_mt t0, 5f
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/* Enter VPE configuration state */
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.set push
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.set MIPS_ISA_LEVEL_RAW
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.set mt
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dvpe
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.set pop
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PTR_LA t1, 1f
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jr.hb t1
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nop
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1: mfc0 t1, CP0_MVPCONTROL
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ori t1, t1, MVPCONTROL_VPC
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mtc0 t1, CP0_MVPCONTROL
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ehb
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/* Loop through each VPE */
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move t8, ta2
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li ta1, 0
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/* Check whether the VPE should be running. If not, skip it */
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1: andi t0, ta2, 1
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beqz t0, 2f
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nop
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/* Operate on the appropriate TC */
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mfc0 t0, CP0_VPECONTROL
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ori t0, t0, VPECONTROL_TARGTC
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xori t0, t0, VPECONTROL_TARGTC
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or t0, t0, ta1
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mtc0 t0, CP0_VPECONTROL
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ehb
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.set push
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.set MIPS_ISA_LEVEL_RAW
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.set mt
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/* Skip the VPE if its TC is not halted */
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mftc0 t0, CP0_TCHALT
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beqz t0, 2f
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nop
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/* Calculate a pointer to the VPEs struct vpe_boot_config */
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li t0, VPEBOOTCFG_SIZE
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mul t0, t0, ta1
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addu t0, t0, ta3
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/* Set the TC restart PC */
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lw t1, VPEBOOTCFG_PC(t0)
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mttc0 t1, CP0_TCRESTART
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/* Set the TC stack pointer */
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lw t1, VPEBOOTCFG_SP(t0)
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mttgpr t1, sp
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/* Set the TC global pointer */
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lw t1, VPEBOOTCFG_GP(t0)
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mttgpr t1, gp
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/* Copy config from this VPE */
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mfc0 t0, CP0_CONFIG
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mttc0 t0, CP0_CONFIG
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/*
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* Copy the EVA config from this VPE if the CPU supports it.
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* CONFIG3 must exist to be running MT startup - just read it.
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*/
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mfc0 t0, CP0_CONFIG, 3
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and t0, t0, MIPS_CONF3_SC
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beqz t0, 3f
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nop
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mfc0 t0, CP0_SEGCTL0
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mttc0 t0, CP0_SEGCTL0
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mfc0 t0, CP0_SEGCTL1
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mttc0 t0, CP0_SEGCTL1
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mfc0 t0, CP0_SEGCTL2
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mttc0 t0, CP0_SEGCTL2
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3:
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/* Ensure no software interrupts are pending */
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mttc0 zero, CP0_CAUSE
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mttc0 zero, CP0_STATUS
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/* Set TC active, not interrupt exempt */
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mftc0 t0, CP0_TCSTATUS
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li t1, ~TCSTATUS_IXMT
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and t0, t0, t1
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ori t0, t0, TCSTATUS_A
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mttc0 t0, CP0_TCSTATUS
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/* Clear the TC halt bit */
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mttc0 zero, CP0_TCHALT
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/* Set VPE active */
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mftc0 t0, CP0_VPECONF0
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ori t0, t0, VPECONF0_VPA
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mttc0 t0, CP0_VPECONF0
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/* Next VPE */
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2: srl ta2, ta2, 1
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addiu ta1, ta1, 1
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bnez ta2, 1b
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nop
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/* Leave VPE configuration state */
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mfc0 t1, CP0_MVPCONTROL
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xori t1, t1, MVPCONTROL_VPC
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mtc0 t1, CP0_MVPCONTROL
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ehb
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evpe
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.set pop
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/* Check whether this VPE is meant to be running */
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li t0, 1
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sll t0, t0, a1
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and t0, t0, t8
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bnez t0, 2f
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nop
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/* This VPE should be offline, halt the TC */
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li t0, TCHALT_H
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mtc0 t0, CP0_TCHALT
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PTR_LA t0, 1f
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1: jr.hb t0
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nop
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2:
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#endif /* CONFIG_MIPS_MT_SMP */
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/* Return */
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5: jr ra
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nop
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END(mips_cps_boot_vpes)
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LEAF(mips_cps_cache_init)
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/*
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|
* Clear the bits used to index the caches. Note that the architecture
|
|
* dictates that writing to any of TagLo or TagHi selects 0 or 2 should
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|
* be valid for all MIPS32 CPUs, even those for which said writes are
|
|
* unnecessary.
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|
*/
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|
mtc0 zero, CP0_TAGLO, 0
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|
mtc0 zero, CP0_TAGHI, 0
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|
mtc0 zero, CP0_TAGLO, 2
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|
mtc0 zero, CP0_TAGHI, 2
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|
ehb
|
|
|
|
/* Primary cache configuration is indicated by Config1 */
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|
mfc0 v0, CP0_CONFIG, 1
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|
|
|
/* Detect I-cache line size */
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|
_EXT t0, v0, MIPS_CONF1_IL_SHF, MIPS_CONF1_IL_SZ
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|
beqz t0, icache_done
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|
li t1, 2
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|
sllv t0, t1, t0
|
|
|
|
/* Detect I-cache size */
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|
_EXT t1, v0, MIPS_CONF1_IS_SHF, MIPS_CONF1_IS_SZ
|
|
xori t2, t1, 0x7
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|
beqz t2, 1f
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|
li t3, 32
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|
addiu t1, t1, 1
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|
sllv t1, t3, t1
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|
1: /* At this point t1 == I-cache sets per way */
|
|
_EXT t2, v0, MIPS_CONF1_IA_SHF, MIPS_CONF1_IA_SZ
|
|
addiu t2, t2, 1
|
|
mul t1, t1, t0
|
|
mul t1, t1, t2
|
|
|
|
li a0, CKSEG0
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|
PTR_ADD a1, a0, t1
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|
1: cache Index_Store_Tag_I, 0(a0)
|
|
PTR_ADD a0, a0, t0
|
|
bne a0, a1, 1b
|
|
nop
|
|
icache_done:
|
|
|
|
/* Detect D-cache line size */
|
|
_EXT t0, v0, MIPS_CONF1_DL_SHF, MIPS_CONF1_DL_SZ
|
|
beqz t0, dcache_done
|
|
li t1, 2
|
|
sllv t0, t1, t0
|
|
|
|
/* Detect D-cache size */
|
|
_EXT t1, v0, MIPS_CONF1_DS_SHF, MIPS_CONF1_DS_SZ
|
|
xori t2, t1, 0x7
|
|
beqz t2, 1f
|
|
li t3, 32
|
|
addiu t1, t1, 1
|
|
sllv t1, t3, t1
|
|
1: /* At this point t1 == D-cache sets per way */
|
|
_EXT t2, v0, MIPS_CONF1_DA_SHF, MIPS_CONF1_DA_SZ
|
|
addiu t2, t2, 1
|
|
mul t1, t1, t0
|
|
mul t1, t1, t2
|
|
|
|
li a0, CKSEG0
|
|
PTR_ADDU a1, a0, t1
|
|
PTR_SUBU a1, a1, t0
|
|
1: cache Index_Store_Tag_D, 0(a0)
|
|
bne a0, a1, 1b
|
|
PTR_ADD a0, a0, t0
|
|
dcache_done:
|
|
|
|
jr ra
|
|
nop
|
|
END(mips_cps_cache_init)
|
|
|
|
#if defined(CONFIG_MIPS_CPS_PM) && defined(CONFIG_CPU_PM)
|
|
|
|
/* Calculate a pointer to this CPUs struct mips_static_suspend_state */
|
|
.macro psstate dest
|
|
.set push
|
|
.set noat
|
|
lw $1, TI_CPU(gp)
|
|
sll $1, $1, LONGLOG
|
|
PTR_LA \dest, __per_cpu_offset
|
|
addu $1, $1, \dest
|
|
lw $1, 0($1)
|
|
PTR_LA \dest, cps_cpu_state
|
|
addu \dest, \dest, $1
|
|
.set pop
|
|
.endm
|
|
|
|
LEAF(mips_cps_pm_save)
|
|
/* Save CPU state */
|
|
SUSPEND_SAVE_REGS
|
|
psstate t1
|
|
SUSPEND_SAVE_STATIC
|
|
jr v0
|
|
nop
|
|
END(mips_cps_pm_save)
|
|
|
|
LEAF(mips_cps_pm_restore)
|
|
/* Restore CPU state */
|
|
psstate t1
|
|
RESUME_RESTORE_STATIC
|
|
RESUME_RESTORE_REGS_RETURN
|
|
END(mips_cps_pm_restore)
|
|
|
|
#endif /* CONFIG_MIPS_CPS_PM && CONFIG_CPU_PM */
|