| 0,0 → 1,185 |
|---|
| /* |
| * 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 mips32mm |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef __mips32_TLB_H__ |
| #define __mips32_TLB_H__ |
| |
| #include <arch/exception.h> |
| #include <typedefs.h> |
| |
| #ifdef TLBCNT |
| # define TLB_ENTRY_COUNT TLBCNT |
| #else |
| # define TLB_ENTRY_COUNT 48 |
| #endif |
| |
| #define TLB_WIRED 1 |
| #define TLB_KSTACK_WIRED_INDEX 0 |
| |
| #define TLB_PAGE_MASK_16K (0x3<<13) |
| |
| #define PAGE_UNCACHED 2 |
| #define PAGE_CACHEABLE_EXC_WRITE 5 |
| |
| typedef union entry_lo entry_lo_t; |
| typedef union entry_hi entry_hi_t; |
| typedef union page_mask page_mask_t; |
| typedef union index tlb_index_t; |
| |
| union entry_lo { |
| struct { |
| #ifdef BIG_ENDIAN |
| 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; |
| }; |
| |
| /** Page Table Entry. */ |
| struct pte { |
| unsigned g : 1; /**< Global bit. */ |
| unsigned p : 1; /**< Present bit. */ |
| unsigned d : 1; /**< Dirty bit. */ |
| unsigned cacheable : 1; /**< Cacheable bit. */ |
| unsigned : 1; /**< Unused. */ |
| unsigned soft_valid : 1; /**< Valid content even if not present. */ |
| unsigned pfn : 24; /**< Physical frame number. */ |
| unsigned w : 1; /**< Page writable bit. */ |
| unsigned a : 1; /**< Accessed bit. */ |
| }; |
| |
| union entry_hi { |
| struct { |
| #ifdef BIG_ENDIAN |
| unsigned vpn2 : 19; |
| unsigned : 5; |
| unsigned asid : 8; |
| #else |
| unsigned asid : 8; |
| unsigned : 5; |
| unsigned vpn2 : 19; |
| #endif |
| } __attribute__ ((packed)); |
| uint32_t value; |
| }; |
| |
| union page_mask { |
| struct { |
| #ifdef BIG_ENDIAN |
| unsigned : 7; |
| unsigned mask : 12; |
| unsigned : 13; |
| #else |
| unsigned : 13; |
| unsigned mask : 12; |
| unsigned : 7; |
| #endif |
| } __attribute__ ((packed)); |
| uint32_t value; |
| }; |
| |
| union index { |
| struct { |
| #ifdef BIG_ENDIAN |
| unsigned p : 1; |
| unsigned : 27; |
| unsigned index : 4; |
| #else |
| unsigned index : 4; |
| unsigned : 27; |
| unsigned p : 1; |
| #endif |
| } __attribute__ ((packed)); |
| uint32_t value; |
| }; |
| |
| /** Probe TLB for Matching Entry |
| * |
| * Probe TLB for Matching Entry. |
| */ |
| static inline void tlbp(void) |
| { |
| __asm__ volatile ("tlbp\n\t"); |
| } |
| |
| |
| /** Read Indexed TLB Entry |
| * |
| * Read Indexed TLB Entry. |
| */ |
| static inline void tlbr(void) |
| { |
| __asm__ volatile ("tlbr\n\t"); |
| } |
| |
| /** Write Indexed TLB Entry |
| * |
| * Write Indexed TLB Entry. |
| */ |
| static inline void tlbwi(void) |
| { |
| __asm__ volatile ("tlbwi\n\t"); |
| } |
| |
| /** Write Random TLB Entry |
| * |
| * Write Random TLB Entry. |
| */ |
| 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); |
| |
| #endif |
| |
| /** @} |
| */ |