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