/*
* Copyright (c) 2003-2004 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*/
/** @addtogroup kernel_mips32_mm
* @{
*/
/** @file
*/
#ifndef KERN_mips32_TLB_H_
#define KERN_mips32_TLB_H_
#include <arch/mm/asid.h>
#include <arch/exception.h>
#include <stdbool.h>
#include <trace.h>
#include <typedefs.h>
#if defined(PROCESSOR_R4000)
#define TLB_ENTRY_COUNT 48
#define TLB_INDEX_BITS 6
#elif defined(PROCESSOR_4Kc)
#define TLB_ENTRY_COUNT 16
#define TLB_INDEX_BITS 4
#else
#error Please define TLB_ENTRY_COUNT for the target processor.
#endif
#define TLB_WIRED 0
#define TLB_PAGE_MASK_4K (0x000 << 13)
#define TLB_PAGE_MASK_16K (0x003 << 13)
#define TLB_PAGE_MASK_64K (0x00f << 13)
#define TLB_PAGE_MASK_256K (0x03f << 13)
#define TLB_PAGE_MASK_1M (0x0ff << 13)
#define TLB_PAGE_MASK_4M (0x3ff << 13)
#define TLB_PAGE_MASK_16M (0xfff << 13)
#define PAGE_UNCACHED 2
#define PAGE_CACHEABLE_EXC_WRITE 5
typedef union {
struct {
#ifdef __BE__
unsigned : 2; /* zero */
unsigned pfn : 24; /* frame number */
unsigned c : 3; /* cache coherency attribute */
unsigned d : 1; /* dirty/write-protect bit */
unsigned v : 1; /* valid bit */
unsigned g : 1; /* global bit */
#else
unsigned g : 1; /* global bit */
unsigned v : 1; /* valid bit */
unsigned d : 1; /* dirty/write-protect bit */
unsigned c : 3; /* cache coherency attribute */
unsigned pfn : 24; /* frame number */
unsigned : 2; /* zero */
#endif
} __attribute__((packed));
uint32_t value;
} entry_lo_t;
typedef union {
struct {
#ifdef __BE__
unsigned vpn2 : 19;
unsigned : 5;
unsigned asid : 8;
#else
unsigned asid : 8;
unsigned : 5;
unsigned vpn2 : 19;
#endif
} __attribute__((packed));
uint32_t value;
} entry_hi_t;
typedef union {
struct {
#ifdef __BE__
unsigned : 7;
unsigned mask : 12;
unsigned : 13;
#else
unsigned : 13;
unsigned mask : 12;
unsigned : 7;
#endif
} __attribute__((packed));
uint32_t value;
} page_mask_t;
typedef union {
struct {
#ifdef __BE__
unsigned p : 1;
unsigned : 32 - TLB_INDEX_BITS - 1;
unsigned index : TLB_INDEX_BITS;
#else
unsigned index : TLB_INDEX_BITS;
unsigned : 32 - TLB_INDEX_BITS - 1;
unsigned p : 1;
#endif
} __attribute__((packed));
uint32_t value;
} tlb_index_t;
/** Probe TLB for Matching Entry
*
* Probe TLB for Matching Entry.
*/
_NO_TRACE static inline void tlbp(void)
{
asm volatile ("tlbp\n\t");
}
/** Read Indexed TLB Entry
*
* Read Indexed TLB Entry.
*/
_NO_TRACE static inline void tlbr(void)
{
asm volatile ("tlbr\n\t");
}
/** Write Indexed TLB Entry
*
* Write Indexed TLB Entry.
*/
_NO_TRACE static inline void tlbwi(void)
{
asm volatile ("tlbwi\n\t");
}
/** Write Random TLB Entry
*
* Write Random TLB Entry.
*/
_NO_TRACE static inline void tlbwr(void)
{
asm volatile ("tlbwr\n\t");
}
#define tlb_invalidate(asid) tlb_invalidate_asid(asid)
extern void tlb_invalid(istate_t *istate);
extern void tlb_refill(istate_t *istate);
extern void tlb_modified(istate_t *istate);
extern void tlb_prepare_entry_lo(entry_lo_t *lo, bool g, bool v, bool d, bool cacheable, uintptr_t pfn);
extern void tlb_prepare_entry_hi(entry_hi_t *hi, asid_t asid, uintptr_t addr);
#endif
/** @}
*/