nkeynes@931: /**
nkeynes@931:  * $Id$
nkeynes@931:  *
nkeynes@931:  * MMU/TLB definitions.
nkeynes@931:  *
nkeynes@931:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@931:  *
nkeynes@931:  * This program is free software; you can redistribute it and/or modify
nkeynes@931:  * it under the terms of the GNU General Public License as published by
nkeynes@931:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@931:  * (at your option) any later version.
nkeynes@931:  *
nkeynes@931:  * This program is distributed in the hope that it will be useful,
nkeynes@931:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@931:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@931:  * GNU General Public License for more details.
nkeynes@931:  */
nkeynes@931: 
nkeynes@931: 
nkeynes@931: #ifndef lxdream_sh4_mmu_H
nkeynes@931: #define lxdream_sh4_mmu_H 1
nkeynes@931: 
nkeynes@931: #include "lxdream.h"
nkeynes@931: 
nkeynes@931: #ifdef __cplusplus
nkeynes@931: extern "C" {
nkeynes@931: #endif
nkeynes@931: 
nkeynes@931: #define VMA_TO_EXT_ADDR(vma) ((vma)&0x1FFFFFFF)
nkeynes@931: 
nkeynes@931: /************************** UTLB/ITLB Definitions ***************************/
nkeynes@939: /* mmucr register bits */
nkeynes@939: #define MMUCR_AT   0x00000001 /* Address Translation enabled */
nkeynes@939: #define MMUCR_TI   0x00000004 /* TLB invalidate (always read as 0) */
nkeynes@939: #define MMUCR_SV   0x00000100 /* Single Virtual mode=1 / multiple virtual=0 */
nkeynes@939: #define MMUCR_SQMD 0x00000200 /* Store queue mode bit (0=user, 1=priv only) */
nkeynes@939: #define MMUCR_URC  0x0000FC00 /* UTLB access counter */
nkeynes@939: #define MMUCR_URB  0x00FC0000 /* UTLB entry boundary */
nkeynes@939: #define MMUCR_LRUI 0xFC000000 /* Least recently used ITLB */
nkeynes@939: #define MMUCR_MASK 0xFCFCFF05
nkeynes@939: #define MMUCR_RMASK 0xFCFCFF01 /* Read mask */
nkeynes@939:     
nkeynes@939: #define IS_TLB_ENABLED() (MMIO_READ(MMU, MMUCR)&MMUCR_AT)
nkeynes@939: #define IS_SV_ENABLED() (MMIO_READ(MMU,MMUCR)&MMUCR_SV)
nkeynes@939: 
nkeynes@931: #define ITLB_ENTRY_COUNT 4
nkeynes@931: #define UTLB_ENTRY_COUNT 64
nkeynes@931: 
nkeynes@931: /* Entry address */
nkeynes@931: #define TLB_VALID     0x00000100
nkeynes@931: #define TLB_USERMODE  0x00000040
nkeynes@931: #define TLB_WRITABLE  0x00000020
nkeynes@931: #define TLB_USERWRITABLE (TLB_WRITABLE|TLB_USERMODE)
nkeynes@931: #define TLB_SIZE_MASK 0x00000090
nkeynes@931: #define TLB_SIZE_1K   0x00000000
nkeynes@931: #define TLB_SIZE_4K   0x00000010
nkeynes@931: #define TLB_SIZE_64K  0x00000080
nkeynes@931: #define TLB_SIZE_1M   0x00000090
nkeynes@931: #define TLB_CACHEABLE 0x00000008
nkeynes@931: #define TLB_DIRTY     0x00000004
nkeynes@931: #define TLB_SHARE     0x00000002
nkeynes@931: #define TLB_WRITETHRU 0x00000001
nkeynes@931: 
nkeynes@931: #define MASK_1K  0xFFFFFC00
nkeynes@931: #define MASK_4K  0xFFFFF000
nkeynes@931: #define MASK_64K 0xFFFF0000
nkeynes@931: #define MASK_1M  0xFFF00000
nkeynes@931: 
nkeynes@931: struct itlb_entry {
nkeynes@931:     sh4addr_t vpn; // Virtual Page Number
nkeynes@931:     uint32_t asid; // Process ID
nkeynes@931:     uint32_t mask;
nkeynes@931:     sh4addr_t ppn; // Physical Page Number
nkeynes@931:     uint32_t flags;
nkeynes@931: };
nkeynes@931: 
nkeynes@931: struct utlb_entry {
nkeynes@931:     sh4addr_t vpn; // Virtual Page Number
nkeynes@931:     uint32_t mask; // Page size mask
nkeynes@931:     uint32_t asid; // Process ID
nkeynes@931:     sh4addr_t ppn; // Physical Page Number
nkeynes@931:     uint32_t flags;
nkeynes@939:     uint32_t pcmcia; // extra pcmcia data - not used in this implementation
nkeynes@931: };
nkeynes@931: 
nkeynes@939: #define TLB_FUNC_SIZE 48
nkeynes@939: 
nkeynes@939: struct utlb_page_entry {
nkeynes@939:     struct mem_region_fn fn;
nkeynes@939:     mem_region_fn_t user_fn;
nkeynes@939:     mem_region_fn_t target;
nkeynes@939:     unsigned char code[TLB_FUNC_SIZE*8];
nkeynes@931: };
nkeynes@939: 
nkeynes@939: struct utlb_1k_entry {
nkeynes@939:     struct mem_region_fn fn;
nkeynes@939:     struct mem_region_fn user_fn;
nkeynes@939:     struct mem_region_fn *subpages[4];
nkeynes@939:     struct mem_region_fn *user_subpages[4];
nkeynes@939:     unsigned char code[TLB_FUNC_SIZE*16];
nkeynes@939: };
nkeynes@939: 
nkeynes@939: void mmu_utlb_init_vtable( struct utlb_entry *ent, struct utlb_page_entry *page, gboolean writable ); 
nkeynes@939: void mmu_utlb_1k_init_vtable( struct utlb_1k_entry *ent ); 
nkeynes@939: 
nkeynes@939: extern uint32_t mmu_urc;
nkeynes@939: extern uint32_t mmu_urb;
nkeynes@931:     
nkeynes@931: #ifdef __cplusplus
nkeynes@931: }
nkeynes@931: #endif
nkeynes@931: #endif /* !lxdream_sh4_mmu_H */