acpiphp: Execute ACPI _REG method for hotadded devices
[linux/fpc-iii.git] / arch / arm / plat-omap / include / plat / iommu.h
blob0752af9d099e017e216887c7f4d67a01d283330d
1 /*
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
16 struct iotlb_entry {
17 u32 da;
18 u32 pa;
19 u32 pgsz, prsvd, valid;
20 union {
21 u16 ap;
22 struct {
23 u32 endian, elsz, mixed;
28 struct iommu {
29 const char *name;
30 struct module *owner;
31 struct clk *clk;
32 void __iomem *regbase;
33 struct device *dev;
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.
42 u32 *iopgd;
43 spinlock_t page_table_lock; /* protect iopgd */
45 int nr_tlb_entries;
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 */
55 struct cr_regs {
56 union {
57 struct {
58 u16 cam_l;
59 u16 cam_h;
61 u32 cam;
63 union {
64 struct {
65 u16 ram_l;
66 u16 ram_h;
68 u32 ram;
72 struct iotlb_lock {
73 short base;
74 short vict;
77 /* architecture specific functions */
78 struct iommu_functions {
79 unsigned long version;
81 int (*enable)(struct iommu *obj);
82 void (*disable)(struct iommu *obj);
83 u32 (*fault_isr)(struct iommu *obj, u32 *ra);
85 void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
86 void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
88 struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
89 int (*cr_valid)(struct cr_regs *cr);
90 u32 (*cr_to_virt)(struct cr_regs *cr);
91 void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
92 ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
94 u32 (*get_pte_attr)(struct iotlb_entry *e);
96 void (*save_ctx)(struct iommu *obj);
97 void (*restore_ctx)(struct iommu *obj);
98 ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
101 struct iommu_platform_data {
102 const char *name;
103 const char *clk_name;
104 const int nr_tlb_entries;
107 #if defined(CONFIG_ARCH_OMAP1)
108 #error "iommu for this processor not implemented yet"
109 #else
110 #include <plat/iommu2.h>
111 #endif
114 * utilities for super page(16MB, 1MB, 64KB and 4KB)
117 #define iopgsz_max(bytes) \
118 (((bytes) >= SZ_16M) ? SZ_16M : \
119 ((bytes) >= SZ_1M) ? SZ_1M : \
120 ((bytes) >= SZ_64K) ? SZ_64K : \
121 ((bytes) >= SZ_4K) ? SZ_4K : 0)
123 #define bytes_to_iopgsz(bytes) \
124 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
125 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
126 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
127 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
129 #define iopgsz_to_bytes(iopgsz) \
130 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
131 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
132 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
133 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
135 #define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
138 * global functions
140 extern u32 iommu_arch_version(void);
142 extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
143 extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
145 extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
146 extern void flush_iotlb_page(struct iommu *obj, u32 da);
147 extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
148 extern void flush_iotlb_all(struct iommu *obj);
150 extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
151 extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
153 extern struct iommu *iommu_get(const char *name);
154 extern void iommu_put(struct iommu *obj);
156 extern void iommu_save_ctx(struct iommu *obj);
157 extern void iommu_restore_ctx(struct iommu *obj);
159 extern int install_iommu_arch(const struct iommu_functions *ops);
160 extern void uninstall_iommu_arch(const struct iommu_functions *ops);
162 extern int foreach_iommu_device(void *data,
163 int (*fn)(struct device *, void *));
165 extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
166 extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
168 #endif /* __MACH_IOMMU_H */