diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/plat-omap/include/plat/iommu.h')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/plat-omap/include/plat/iommu.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/arm/plat-omap/include/plat/iommu.h b/ANDROID_3.4.5/arch/arm/plat-omap/include/plat/iommu.h new file mode 100644 index 00000000..88be3e62 --- /dev/null +++ b/ANDROID_3.4.5/arch/arm/plat-omap/include/plat/iommu.h @@ -0,0 +1,206 @@ +/* + * omap iommu: main structures + * + * Copyright (C) 2008-2009 Nokia Corporation + * + * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __MACH_IOMMU_H +#define __MACH_IOMMU_H + +struct iotlb_entry { + u32 da; + u32 pa; + u32 pgsz, prsvd, valid; + union { + u16 ap; + struct { + u32 endian, elsz, mixed; + }; + }; +}; + +struct omap_iommu { + const char *name; + struct module *owner; + struct clk *clk; + void __iomem *regbase; + struct device *dev; + void *isr_priv; + struct iommu_domain *domain; + + unsigned int refcount; + spinlock_t iommu_lock; /* global for this whole object */ + + /* + * We don't change iopgd for a situation like pgd for a task, + * but share it globally for each iommu. + */ + u32 *iopgd; + spinlock_t page_table_lock; /* protect iopgd */ + + int nr_tlb_entries; + + struct list_head mmap; + struct mutex mmap_lock; /* protect mmap */ + + void *ctx; /* iommu context: registres saved area */ + u32 da_start; + u32 da_end; +}; + +struct cr_regs { + union { + struct { + u16 cam_l; + u16 cam_h; + }; + u32 cam; + }; + union { + struct { + u16 ram_l; + u16 ram_h; + }; + u32 ram; + }; +}; + +struct iotlb_lock { + short base; + short vict; +}; + +/* architecture specific functions */ +struct iommu_functions { + unsigned long version; + + int (*enable)(struct omap_iommu *obj); + void (*disable)(struct omap_iommu *obj); + void (*set_twl)(struct omap_iommu *obj, bool on); + u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra); + + void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr); + void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr); + + struct cr_regs *(*alloc_cr)(struct omap_iommu *obj, + struct iotlb_entry *e); + int (*cr_valid)(struct cr_regs *cr); + u32 (*cr_to_virt)(struct cr_regs *cr); + void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e); + ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr, + char *buf); + + u32 (*get_pte_attr)(struct iotlb_entry *e); + + void (*save_ctx)(struct omap_iommu *obj); + void (*restore_ctx)(struct omap_iommu *obj); + ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len); +}; + +struct iommu_platform_data { + const char *name; + const char *clk_name; + const int nr_tlb_entries; + u32 da_start; + u32 da_end; +}; + +/** + * struct iommu_arch_data - omap iommu private data + * @name: name of the iommu device + * @iommu_dev: handle of the iommu device + * + * This is an omap iommu private data object, which binds an iommu user + * to its iommu device. This object should be placed at the iommu user's + * dev_archdata so generic IOMMU API can be used without having to + * utilize omap-specific plumbing anymore. + */ +struct omap_iommu_arch_data { + const char *name; + struct omap_iommu *iommu_dev; +}; + +/** + * dev_to_omap_iommu() - retrieves an omap iommu object from a user device + * @dev: iommu client device + */ +static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev) +{ + struct omap_iommu_arch_data *arch_data = dev->archdata.iommu; + + return arch_data->iommu_dev; +} + +/* IOMMU errors */ +#define OMAP_IOMMU_ERR_TLB_MISS (1 << 0) +#define OMAP_IOMMU_ERR_TRANS_FAULT (1 << 1) +#define OMAP_IOMMU_ERR_EMU_MISS (1 << 2) +#define OMAP_IOMMU_ERR_TBLWALK_FAULT (1 << 3) +#define OMAP_IOMMU_ERR_MULTIHIT_FAULT (1 << 4) + +#if defined(CONFIG_ARCH_OMAP1) +#error "iommu for this processor not implemented yet" +#else +#include <plat/iommu2.h> +#endif + +/* + * utilities for super page(16MB, 1MB, 64KB and 4KB) + */ + +#define iopgsz_max(bytes) \ + (((bytes) >= SZ_16M) ? SZ_16M : \ + ((bytes) >= SZ_1M) ? SZ_1M : \ + ((bytes) >= SZ_64K) ? SZ_64K : \ + ((bytes) >= SZ_4K) ? SZ_4K : 0) + +#define bytes_to_iopgsz(bytes) \ + (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \ + ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \ + ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \ + ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1) + +#define iopgsz_to_bytes(iopgsz) \ + (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \ + ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \ + ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \ + ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0) + +#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0) + +/* + * global functions + */ +extern u32 omap_iommu_arch_version(void); + +extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e); + +extern int +omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e); + +extern int omap_iommu_set_isr(const char *name, + int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs, + void *priv), + void *isr_priv); + +extern void omap_iommu_save_ctx(struct device *dev); +extern void omap_iommu_restore_ctx(struct device *dev); + +extern int omap_install_iommu_arch(const struct iommu_functions *ops); +extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops); + +extern int omap_foreach_iommu_device(void *data, + int (*fn)(struct device *, void *)); + +extern ssize_t +omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len); +extern size_t +omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len); + +#endif /* __MACH_IOMMU_H */ |