1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * omap iommu: main structures
5 * Copyright (C) 2008-2009 Nokia Corporation
7 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
13 #include <linux/bitops.h>
14 #include <linux/iommu.h>
16 #define for_each_iotlb_cr(obj, n, __i, cr) \
18 (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \
24 u32 pgsz, prsvd, valid;
25 u32 endian, elsz, mixed;
29 * struct omap_iommu_device - omap iommu device data
30 * @pgtable: page table used by an omap iommu attached to a domain
31 * @iommu_dev: pointer to store an omap iommu instance attached to a domain
33 struct omap_iommu_device {
35 struct omap_iommu *iommu_dev;
39 * struct omap_iommu_domain - omap iommu domain
40 * @num_iommus: number of iommus in this domain
41 * @iommus: omap iommu device data for all iommus in this domain
42 * @dev: Device using this domain.
43 * @lock: domain lock, should be taken when attaching/detaching
44 * @domain: generic domain handle used by iommu core code
46 struct omap_iommu_domain {
48 struct omap_iommu_device *iommus;
51 struct iommu_domain domain;
56 void __iomem *regbase;
57 struct regmap *syscfg;
59 struct iommu_domain *domain;
60 struct dentry *debug_dir;
62 spinlock_t iommu_lock; /* global for this whole object */
65 * We don't change iopgd for a situation like pgd for a task,
66 * but share it globally for each iommu.
69 spinlock_t page_table_lock; /* protect iopgd */
74 void *ctx; /* iommu context: registres saved area */
76 struct cr_regs *cr_ctx;
82 struct iommu_device iommu;
83 struct iommu_group *group;
89 * struct omap_iommu_arch_data - omap iommu private data
90 * @iommu_dev: handle of the OMAP iommu device
91 * @dev: handle of the iommu device
93 * This is an omap iommu private data object, which binds an iommu user
94 * to its iommu device. This object should be placed at the iommu user's
95 * dev_archdata so generic IOMMU API can be used without having to
96 * utilize omap-specific plumbing anymore.
98 struct omap_iommu_arch_data {
99 struct omap_iommu *iommu_dev;
114 * MMU Register offsets
116 #define MMU_REVISION 0x00
117 #define MMU_IRQSTATUS 0x18
118 #define MMU_IRQENABLE 0x1c
119 #define MMU_WALKING_ST 0x40
120 #define MMU_CNTL 0x44
121 #define MMU_FAULT_AD 0x48
123 #define MMU_LOCK 0x50
124 #define MMU_LD_TLB 0x54
127 #define MMU_GFLUSH 0x60
128 #define MMU_FLUSH_ENTRY 0x64
129 #define MMU_READ_CAM 0x68
130 #define MMU_READ_RAM 0x6c
131 #define MMU_EMU_FAULT_AD 0x70
132 #define MMU_GP_REG 0x88
134 #define MMU_REG_SIZE 256
137 * MMU Register bit definitions
139 /* IRQSTATUS & IRQENABLE */
140 #define MMU_IRQ_MULTIHITFAULT BIT(4)
141 #define MMU_IRQ_TABLEWALKFAULT BIT(3)
142 #define MMU_IRQ_EMUMISS BIT(2)
143 #define MMU_IRQ_TRANSLATIONFAULT BIT(1)
144 #define MMU_IRQ_TLBMISS BIT(0)
146 #define __MMU_IRQ_FAULT \
147 (MMU_IRQ_MULTIHITFAULT | MMU_IRQ_EMUMISS | MMU_IRQ_TRANSLATIONFAULT)
148 #define MMU_IRQ_MASK \
149 (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT | MMU_IRQ_TLBMISS)
150 #define MMU_IRQ_TWL_MASK (__MMU_IRQ_FAULT | MMU_IRQ_TABLEWALKFAULT)
151 #define MMU_IRQ_TLB_MISS_MASK (__MMU_IRQ_FAULT | MMU_IRQ_TLBMISS)
154 #define MMU_CNTL_SHIFT 1
155 #define MMU_CNTL_MASK (7 << MMU_CNTL_SHIFT)
156 #define MMU_CNTL_EML_TLB BIT(3)
157 #define MMU_CNTL_TWL_EN BIT(2)
158 #define MMU_CNTL_MMU_EN BIT(1)
161 #define MMU_CAM_VATAG_SHIFT 12
162 #define MMU_CAM_VATAG_MASK \
163 ((~0UL >> MMU_CAM_VATAG_SHIFT) << MMU_CAM_VATAG_SHIFT)
164 #define MMU_CAM_P BIT(3)
165 #define MMU_CAM_V BIT(2)
166 #define MMU_CAM_PGSZ_MASK 3
167 #define MMU_CAM_PGSZ_1M (0 << 0)
168 #define MMU_CAM_PGSZ_64K (1 << 0)
169 #define MMU_CAM_PGSZ_4K (2 << 0)
170 #define MMU_CAM_PGSZ_16M (3 << 0)
173 #define MMU_RAM_PADDR_SHIFT 12
174 #define MMU_RAM_PADDR_MASK \
175 ((~0UL >> MMU_RAM_PADDR_SHIFT) << MMU_RAM_PADDR_SHIFT)
177 #define MMU_RAM_ENDIAN_SHIFT 9
178 #define MMU_RAM_ENDIAN_MASK BIT(MMU_RAM_ENDIAN_SHIFT)
179 #define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
180 #define MMU_RAM_ENDIAN_BIG BIT(MMU_RAM_ENDIAN_SHIFT)
182 #define MMU_RAM_ELSZ_SHIFT 7
183 #define MMU_RAM_ELSZ_MASK (3 << MMU_RAM_ELSZ_SHIFT)
184 #define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
185 #define MMU_RAM_ELSZ_16 (1 << MMU_RAM_ELSZ_SHIFT)
186 #define MMU_RAM_ELSZ_32 (2 << MMU_RAM_ELSZ_SHIFT)
187 #define MMU_RAM_ELSZ_NONE (3 << MMU_RAM_ELSZ_SHIFT)
188 #define MMU_RAM_MIXED_SHIFT 6
189 #define MMU_RAM_MIXED_MASK BIT(MMU_RAM_MIXED_SHIFT)
190 #define MMU_RAM_MIXED MMU_RAM_MIXED_MASK
192 #define MMU_GP_REG_BUS_ERR_BACK_EN 0x1
194 #define get_cam_va_mask(pgsz) \
195 (((pgsz) == MMU_CAM_PGSZ_16M) ? 0xff000000 : \
196 ((pgsz) == MMU_CAM_PGSZ_1M) ? 0xfff00000 : \
197 ((pgsz) == MMU_CAM_PGSZ_64K) ? 0xffff0000 : \
198 ((pgsz) == MMU_CAM_PGSZ_4K) ? 0xfffff000 : 0)
201 * DSP_SYSTEM registers and bit definitions (applicable only for DRA7xx DSP)
203 #define DSP_SYS_REVISION 0x00
204 #define DSP_SYS_MMU_CONFIG 0x18
205 #define DSP_SYS_MMU_CONFIG_EN_SHIFT 4
208 * utilities for super page(16MB, 1MB, 64KB and 4KB)
211 #define iopgsz_max(bytes) \
212 (((bytes) >= SZ_16M) ? SZ_16M : \
213 ((bytes) >= SZ_1M) ? SZ_1M : \
214 ((bytes) >= SZ_64K) ? SZ_64K : \
215 ((bytes) >= SZ_4K) ? SZ_4K : 0)
217 #define bytes_to_iopgsz(bytes) \
218 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
219 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
220 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
221 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
223 #define iopgsz_to_bytes(iopgsz) \
224 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
225 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
226 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
227 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
229 #define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
235 struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n);
236 void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l);
237 void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l);
239 #ifdef CONFIG_OMAP_IOMMU_DEBUG
240 void omap_iommu_debugfs_init(void);
241 void omap_iommu_debugfs_exit(void);
243 void omap_iommu_debugfs_add(struct omap_iommu *obj);
244 void omap_iommu_debugfs_remove(struct omap_iommu *obj);
246 static inline void omap_iommu_debugfs_init(void) { }
247 static inline void omap_iommu_debugfs_exit(void) { }
249 static inline void omap_iommu_debugfs_add(struct omap_iommu *obj) { }
250 static inline void omap_iommu_debugfs_remove(struct omap_iommu *obj) { }
256 static inline u32 iommu_read_reg(struct omap_iommu *obj, size_t offs)
258 return __raw_readl(obj->regbase + offs);
261 static inline void iommu_write_reg(struct omap_iommu *obj, u32 val, size_t offs)
263 __raw_writel(val, obj->regbase + offs);
266 static inline int iotlb_cr_valid(struct cr_regs *cr)
271 return cr->cam & MMU_CAM_V;
274 #endif /* _OMAP_IOMMU_H */