include/asm-arm/arch-omap/mmu.h

   1 #ifndef __ARCH_OMAP_MMU_H
   2 #define __ARCH_OMAP_MMU_H
   3
   4 #include <linux/device.h>
   5 #include <linux/workqueue.h>
   6
   7 #define MMU_REVISION            0x00
   8 #define MMU_SYSCONFIG           0x10
   9 #define MMU_SYSSTATUS           0x14
  10 #define MMU_IRQSTATUS           0x18
  11 #define MMU_IRQENABLE           0x1c
  12 #define MMU_WALKING_ST          0x40
  13 #define MMU_CNTL                0x44
  14 #define MMU_FAULT_AD            0x48
  15 #define MMU_TTB                 0x4c
  16 #define MMU_LOCK                0x50
  17 #define MMU_LD_TLB              0x54
  18 #define MMU_CAM                 0x58
  19 #define MMU_RAM                 0x5c
  20 #define MMU_GFLUSH              0x60
  21 #define MMU_FLUSH_ENTRY         0x64
  22 #define MMU_READ_CAM            0x68
  23 #define MMU_READ_RAM            0x6c
  24 #define MMU_EMU_FAULT_AD        0x70
  25
  26 enum exmap_type {
  27         EXMAP_TYPE_MEM,
  28         EXMAP_TYPE_FB
  29 };
  30
  31 enum omap_mmu_type {
  32         OMAP_MMU_DSP,
  33         OMAP_MMU_IVA1,
  34         OMAP_MMU_CAMERA,
  35 };
  36
  37 struct exmap_tbl {
  38         unsigned int valid:1;
  39         unsigned int prsvd:1;
  40         int usecount;           /* reference count by mmap */
  41         enum exmap_type type;
  42         void *buf;              /* virtual address of the buffer,
  43                                  * i.e. 0xc0000000 - */
  44         void *vadr;             /* DSP shadow space,
  45                                  * i.e. 0xe0000000 - 0xe0ffffff */
  46         unsigned int order;
  47         struct {
  48                 int prev;
  49                 int next;
  50         } link;                 /* grouping */
  51 };
  52
  53 struct cam_ram_regset {
  54         union {
  55                 struct {
  56                         u16 cam_l;
  57                         u16 cam_h;
  58                 };
  59
  60                 u32 cam;
  61         };
  62
  63         union {
  64                 struct {
  65                         u16 ram_l;
  66                         u16 ram_h;
  67                 };
  68
  69                 u32 ram;
  70         };
  71 };
  72
  73 struct omap_mmu_tlb_lock {
  74         int base;
  75         int victim;
  76 };
  77
  78 struct omap_mmu;
  79 struct omap_mmu_tlb_entry;
  80
  81 struct omap_mmu_ops {
  82         int (*startup)(struct omap_mmu *mmu);
  83         void (*shutdown)(struct omap_mmu *mmu);
  84
  85         /* TLB operations */
  86         void (*read_tlb)(struct omap_mmu *, struct cam_ram_regset *);
  87         void (*load_tlb)(struct omap_mmu *, struct cam_ram_regset *);
  88         ssize_t (*show)(struct omap_mmu *, char *, struct omap_mmu_tlb_lock *);
  89
  90         /* CAM / RAM operations */
  91         struct cam_ram_regset *(*cam_ram_alloc)(struct omap_mmu_tlb_entry *);
  92         int (*cam_ram_valid)(struct cam_ram_regset *);
  93         unsigned long (*cam_va)(struct cam_ram_regset *);
  94
  95         /* Memory operations */
  96         int (*mem_enable)(struct omap_mmu *, void *);
  97         int (*mem_disable)(struct omap_mmu *, void *);
  98
  99         void (*interrupt)(struct omap_mmu *);
 100
 101         /* PTE attribute operations */
 102         pgprot_t (*pte_get_attr)(struct omap_mmu_tlb_entry *);
 103 };
 104
 105 struct omap_mmu {
 106         const char *name;
 107         unsigned long base;
 108         struct clk *clk;
 109
 110         unsigned long membase, memsize;
 111         struct clk *memclk;
 112
 113         enum omap_mmu_type type;
 114
 115         struct device dev;
 116
 117         struct rw_semaphore exmap_sem;
 118         struct exmap_tbl *exmap_tbl;
 119
 120         unsigned int nr_tlb_entries;
 121         unsigned int nr_exmap_preserved;
 122
 123         struct mm_struct *twl_mm;
 124
 125         /* Size of virtual address space, in bits */
 126         unsigned int addrspace;
 127
 128         /* Interrupt */
 129         unsigned int irq;
 130         unsigned long fault_address;
 131         struct work_struct irq_work;
 132
 133         struct omap_mmu_ops *ops;
 134 };
 135
 136 #define omap_mmu_internal_memory(mmu, addr)                                     \
 137         (likely(mmu->membase) && (((unsigned long)(addr) >= mmu->membase) &&    \
 138                  ((unsigned long)(addr) < mmu->membase + mmu->memsize)))
 139
 140 #define INIT_EXMAP_TBL_ENTRY(ent,b,v,typ,od)    \
 141 do {                                            \
 142         (ent)->buf              = (b);          \
 143         (ent)->vadr             = (v);          \
 144         (ent)->valid            = 1;            \
 145         (ent)->prsvd            = 0;            \
 146         (ent)->usecount         = 0;            \
 147         (ent)->type             = (typ);        \
 148         (ent)->order            = (od);         \
 149         (ent)->link.next        = -1;           \
 150         (ent)->link.prev        = -1;           \
 151 } while (0)
 152
 153 #define INIT_EXMAP_TBL_ENTRY_4KB_PRESERVED(ent,b,v)     \
 154 do {                                                    \
 155         (ent)->buf              = (b);                  \
 156         (ent)->vadr             = (v);                  \
 157         (ent)->valid            = 1;                    \
 158         (ent)->prsvd            = 1;                    \
 159         (ent)->usecount         = 0;                    \
 160         (ent)->type             = EXMAP_TYPE_MEM;       \
 161         (ent)->order            = 0;                    \
 162         (ent)->link.next        = -1;                   \
 163         (ent)->link.prev        = -1;                   \
 164 } while (0)
 165
 166 #define omap_mmu_to_virt(mmu, db)       ((void *)((mmu)->membase + (db)))
 167 #define virt_to_omap_mmu(mmu, va) \
 168         (((unsigned long)(va) - (mmu)->membase))
 169
 170 /* arch/arm/plat-omap/mmu.c */
 171 int omap_mmu_register(struct omap_mmu *mmu);
 172 void omap_mmu_unregister(struct omap_mmu *mmu);
 173
 174 void omap_mmu_enable(struct omap_mmu *mmu, int reset);
 175 void omap_mmu_disable(struct omap_mmu *mmu);
 176
 177 int omap_mmu_mem_enable(struct omap_mmu *mmu, void *addr);
 178 void omap_mmu_mem_disable(struct omap_mmu *mmu, void *addr);
 179
 180 void omap_mmu_read_tlb(struct omap_mmu *mmu, struct omap_mmu_tlb_lock *lock,
 181                        struct cam_ram_regset *cr);
 182
 183 int omap_mmu_load_tlb_entry(struct omap_mmu *, struct omap_mmu_tlb_entry *);
 184 int omap_mmu_clear_tlb_entry(struct omap_mmu *, unsigned long vadr);
 185
 186 int omap_mmu_load_pte_entry(struct omap_mmu *mmu,
 187                             struct omap_mmu_tlb_entry *entry);
 188 int omap_mmu_clear_pte_entry(struct omap_mmu *mmu, unsigned long vadr);
 189
 190 int omap_mmu_kmem_reserve(struct omap_mmu *mmu, unsigned long size);
 191 void omap_mmu_kmem_release(void);
 192
 193 unsigned long omap_mmu_virt_to_phys(struct omap_mmu *mmu, void *vadr,
 194                                     size_t *len);
 195
 196 int omap_mmu_exmap(struct omap_mmu *mmu, unsigned long dspadr,
 197                    unsigned long padr, unsigned long size,
 198                    enum exmap_type type);
 199 int omap_mmu_exunmap(struct omap_mmu *mmu, unsigned long dspadr);
 200 void omap_mmu_exmap_flush(struct omap_mmu *mmu);
 201 void omap_mmu_exmap_use(struct omap_mmu *mmu, void *vadr, size_t len);
 202 void omap_mmu_exmap_unuse(struct omap_mmu *mmu, void *vadr, size_t len);
 203
 204 int exmap_set_armmmu(unsigned long virt, unsigned long phys, unsigned long size);
 205 void exmap_clear_armmmu(unsigned long virt, unsigned long size);
 206 void exmap_setup_preserved_mem_page(struct omap_mmu *mmu, void *buf,
 207                                     unsigned long dspadr, int index);
 208 void exmap_clear_mem_page(struct omap_mmu *mmu, unsigned long dspadr);
 209 int exmap_valid(struct omap_mmu *mmu, void *vadr, size_t len);
 210
 211 /* To be obsolete for backward compatibility */
 212 ssize_t __omap_mmu_mem_read(struct omap_mmu *mmu, char *buf, loff_t offset, size_t count);
 213 ssize_t __omap_mmu_mem_write(struct omap_mmu *mmu, char *buf, loff_t offset, size_t count);
 214
 215 #endif /* __ARCH_OMAP_MMU_H */