167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* NETLOGIC_BSD
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* $FreeBSD$
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*/
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#ifndef __XLP_MMU_H__
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#define __XLP_MMU_H__
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#include <mips/nlm/hal/mips-extns.h>
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static __inline__ uint32_t
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nlm_read_c0_config6(void)
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{
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uint32_t rv;
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__asm__ __volatile__ (
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".set push\n"
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".set mips64\n"
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"mfc0 %0, $16, 6\n"
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".set pop\n"
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: "=r" (rv));
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return rv;
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}
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static __inline__ void
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nlm_write_c0_config6(uint32_t value)
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{
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__asm__ __volatile__ (
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".set push\n"
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".set mips64\n"
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"mtc0 %0, $16, 6\n"
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".set pop\n"
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: : "r" (value));
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}
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static __inline__ uint32_t
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nlm_read_c0_config7(void)
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{
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uint32_t rv;
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__asm__ __volatile__ (
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".set push\n"
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".set mips64\n"
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"mfc0 %0, $16, 7\n"
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".set pop\n"
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: "=r" (rv));
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return rv;
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}
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static __inline__ void
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nlm_write_c0_config7(uint32_t value)
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{
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__asm__ __volatile__ (
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".set push\n"
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".set mips64\n"
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"mtc0 %0, $16, 7\n"
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".set pop\n"
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: : "r" (value));
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}
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/**
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* On power on reset, XLP comes up with 64 TLBs.
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* Large-variable-tlb's (ELVT) and extended TLB is disabled.
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* Enabling large-variable-tlb's sets up the standard
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* TLB size from 64 to 128 TLBs.
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* Enabling fixed TLB (EFT) sets up an additional 2048 tlbs.
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* ELVT + EFT = 128 + 2048 = 2176 TLB entries.
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* threads 64-entry-standard-tlb 128-entry-standard-tlb
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* per std-tlb-only| std+EFT | std-tlb-only| std+EFT
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* core | | |
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* --------------------------------------------------------
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* 1 64 64+2048 128 128+2048
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* 2 64 64+1024 64 64+1024
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* 4 32 32+512 32 32+512
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*
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* 1(G) 64 64+2048 128 128+2048
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* 2(G) 128 128+2048 128 128+2048
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* 4(G) 128 128+2048 128 128+2048
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* (G) = Global mode
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*/
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/* en = 1 to enable
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* en = 0 to disable
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*/
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static __inline__ void nlm_large_variable_tlb_en (int en)
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{
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unsigned int val;
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val = nlm_read_c0_config6();
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val |= (en << 5);
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nlm_write_c0_config6(val);
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return;
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}
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/* en = 1 to enable
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* en = 0 to disable
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*/
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static __inline__ void nlm_pagewalker_en(int en)
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{
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unsigned int val;
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val = nlm_read_c0_config6();
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val |= (en << 3);
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nlm_write_c0_config6(val);
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return;
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}
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/* en = 1 to enable
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* en = 0 to disable
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*/
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static __inline__ void nlm_extended_tlb_en(int en)
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{
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unsigned int val;
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val = nlm_read_c0_config6();
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val |= (en << 2);
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nlm_write_c0_config6(val);
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return;
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}
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static __inline__ int nlm_get_num_combined_tlbs(void)
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{
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return (((nlm_read_c0_config6() >> 16) & 0xffff) + 1);
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}
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/* get number of variable TLB entries */
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static __inline__ int nlm_get_num_vtlbs(void)
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{
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return (((nlm_read_c0_config6() >> 6) & 0x3ff) + 1);
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}
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static __inline__ void nlm_setup_extended_pagemask(int mask)
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{
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nlm_write_c0_config7(mask);
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}
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#endif
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