2 * omap iommu: main structures
4 * Copyright (C) 2008-2009 Nokia Corporation
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef __MACH_IOMMU_H
14 #define __MACH_IOMMU_H
19 u32 pgsz, prsvd, valid;
23 u32 endian, elsz, mixed;
32 void __iomem *regbase;
35 unsigned int refcount;
36 struct mutex iommu_lock; /* global for this whole object */
39 * We don't change iopgd for a situation like pgd for a task,
40 * but share it globally for each iommu.
43 spinlock_t page_table_lock; /* protect iopgd */
47 struct list_head mmap;
48 struct mutex mmap_lock; /* protect mmap */
50 int (*isr)(struct iommu *obj);
52 void *ctx; /* iommu context: registres saved area */
79 /* architecture specific functions */
80 struct iommu_functions {
81 unsigned long version;
83 int (*enable)(struct iommu *obj);
84 void (*disable)(struct iommu *obj);
85 void (*set_twl)(struct iommu *obj, bool on);
86 u32 (*fault_isr)(struct iommu *obj, u32 *ra);
88 void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
89 void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
91 struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
92 int (*cr_valid)(struct cr_regs *cr);
93 u32 (*cr_to_virt)(struct cr_regs *cr);
94 void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
95 ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
97 u32 (*get_pte_attr)(struct iotlb_entry *e);
99 void (*save_ctx)(struct iommu *obj);
100 void (*restore_ctx)(struct iommu *obj);
101 ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
104 struct iommu_platform_data {
106 const char *clk_name;
107 const int nr_tlb_entries;
112 #if defined(CONFIG_ARCH_OMAP1)
113 #error "iommu for this processor not implemented yet"
115 #include <plat/iommu2.h>
119 * utilities for super page(16MB, 1MB, 64KB and 4KB)
122 #define iopgsz_max(bytes) \
123 (((bytes) >= SZ_16M) ? SZ_16M : \
124 ((bytes) >= SZ_1M) ? SZ_1M : \
125 ((bytes) >= SZ_64K) ? SZ_64K : \
126 ((bytes) >= SZ_4K) ? SZ_4K : 0)
128 #define bytes_to_iopgsz(bytes) \
129 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
130 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
131 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
132 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
134 #define iopgsz_to_bytes(iopgsz) \
135 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
136 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
137 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
138 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
140 #define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
145 extern u32 iommu_arch_version(void);
147 extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
148 extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
150 extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
151 extern void iommu_set_twl(struct iommu *obj, bool on);
152 extern void flush_iotlb_page(struct iommu *obj, u32 da);
153 extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
154 extern void flush_iotlb_all(struct iommu *obj);
156 extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
157 extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
159 extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
160 extern struct iommu *iommu_get(const char *name);
161 extern void iommu_put(struct iommu *obj);
163 extern void iommu_save_ctx(struct iommu *obj);
164 extern void iommu_restore_ctx(struct iommu *obj);
166 extern int install_iommu_arch(const struct iommu_functions *ops);
167 extern void uninstall_iommu_arch(const struct iommu_functions *ops);
169 extern int foreach_iommu_device(void *data,
170 int (*fn)(struct device *, void *));
172 extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
173 extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
175 #endif /* __MACH_IOMMU_H */