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;
36 unsigned int refcount;
37 spinlock_t iommu_lock; /* global for this whole object */
40 * We don't change iopgd for a situation like pgd for a task,
41 * but share it globally for each iommu.
44 spinlock_t page_table_lock; /* protect iopgd */
48 struct list_head mmap;
49 struct mutex mmap_lock; /* protect mmap */
51 int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs, void *priv);
53 void *ctx; /* iommu context: registres saved area */
80 /* architecture specific functions */
81 struct iommu_functions {
82 unsigned long version;
84 int (*enable)(struct omap_iommu *obj);
85 void (*disable)(struct omap_iommu *obj);
86 void (*set_twl)(struct omap_iommu *obj, bool on);
87 u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
89 void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
90 void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
92 struct cr_regs *(*alloc_cr)(struct omap_iommu *obj,
93 struct iotlb_entry *e);
94 int (*cr_valid)(struct cr_regs *cr);
95 u32 (*cr_to_virt)(struct cr_regs *cr);
96 void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
97 ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr,
100 u32 (*get_pte_attr)(struct iotlb_entry *e);
102 void (*save_ctx)(struct omap_iommu *obj);
103 void (*restore_ctx)(struct omap_iommu *obj);
104 ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
107 struct iommu_platform_data {
109 const char *clk_name;
110 const int nr_tlb_entries;
116 #define OMAP_IOMMU_ERR_TLB_MISS (1 << 0)
117 #define OMAP_IOMMU_ERR_TRANS_FAULT (1 << 1)
118 #define OMAP_IOMMU_ERR_EMU_MISS (1 << 2)
119 #define OMAP_IOMMU_ERR_TBLWALK_FAULT (1 << 3)
120 #define OMAP_IOMMU_ERR_MULTIHIT_FAULT (1 << 4)
122 #if defined(CONFIG_ARCH_OMAP1)
123 #error "iommu for this processor not implemented yet"
125 #include <plat/iommu2.h>
129 * utilities for super page(16MB, 1MB, 64KB and 4KB)
132 #define iopgsz_max(bytes) \
133 (((bytes) >= SZ_16M) ? SZ_16M : \
134 ((bytes) >= SZ_1M) ? SZ_1M : \
135 ((bytes) >= SZ_64K) ? SZ_64K : \
136 ((bytes) >= SZ_4K) ? SZ_4K : 0)
138 #define bytes_to_iopgsz(bytes) \
139 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
140 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
141 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
142 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
144 #define iopgsz_to_bytes(iopgsz) \
145 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
146 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
147 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
148 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
150 #define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
155 extern u32 omap_iommu_arch_version(void);
157 extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
160 omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
162 extern int omap_iommu_set_isr(const char *name,
163 int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
167 extern void omap_iommu_save_ctx(struct omap_iommu *obj);
168 extern void omap_iommu_restore_ctx(struct omap_iommu *obj);
170 extern int omap_install_iommu_arch(const struct iommu_functions *ops);
171 extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
173 extern int omap_foreach_iommu_device(void *data,
174 int (*fn)(struct device *, void *));
177 omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
179 omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
180 struct device *omap_find_iommu_device(const char *name);
182 #endif /* __MACH_IOMMU_H */