diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-08 08:15:29 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-08 08:15:29 -0800 |
commit | 1c496784a0d317535f846ddb2c93a08ba936266b (patch) | |
tree | 6d0225860032f263b6d95a3e55c364a1a5f55ec1 /arch/arm/plat-omap/include/plat/iommu.h | |
parent | adf9904dc774f23f04a5425f0198483ea61f878b (diff) | |
parent | 9a01609e1885b827b979d6d9dd86f43208a9e5fc (diff) |
Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (149 commits)
arm: omap: Add omap3_defconfig
AM35xx: Defconfig for AM3517 EVM board
AM35xx: Add support for AM3517 EVM board
omap: 3630sdp: defconfig creation
omap: 3630sdp: introduce 3630 sdp board support
omap3: Add defconfig for IGEP v2 board
omap3: Add minimal IGEP v2 support
omap3: Add CompuLab CM-T35 defconfig
omap3: Add CompuLab CM-T35 board support
omap3: rx51: Add wl1251 wlan driver support
omap3: rx51: Add SDRAM init
omap1: Add default kernel configuration for Herald
omap1: Add board support and LCD for HTC Herald
omap: zoom2: update defconfig for LL_DEBUG_NONE
omap: zoom3: defconfig creation
omap3: zoom: Introduce zoom3 board support
omap3: zoom: Drop i2c-1 speed to 2400
omap3: zoom: rename zoom2 name to generic zoom
omap3: zoom: split board file for software reuse
omap3evm: MIgrate to smsc911x ethernet driver
...
Fix trivial conflict (two unrelated config options added next to each
other) in arch/arm/mach-omap2/Makefile
Diffstat (limited to 'arch/arm/plat-omap/include/plat/iommu.h')
-rw-r--r-- | arch/arm/plat-omap/include/plat/iommu.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/iommu.h b/arch/arm/plat-omap/include/plat/iommu.h new file mode 100644 index 00000000000..0752af9d099 --- /dev/null +++ b/arch/arm/plat-omap/include/plat/iommu.h @@ -0,0 +1,168 @@ +/* + * 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 iommu { + const char *name; + struct module *owner; + struct clk *clk; + void __iomem *regbase; + struct device *dev; + + unsigned int refcount; + struct mutex 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 */ + + int (*isr)(struct iommu *obj); + + void *ctx; /* iommu context: registres saved area */ +}; + +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 iommu *obj); + void (*disable)(struct iommu *obj); + u32 (*fault_isr)(struct iommu *obj, u32 *ra); + + void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr); + void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr); + + struct cr_regs *(*alloc_cr)(struct 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 iommu *obj, struct cr_regs *cr, char *buf); + + u32 (*get_pte_attr)(struct iotlb_entry *e); + + void (*save_ctx)(struct iommu *obj); + void (*restore_ctx)(struct iommu *obj); + ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len); +}; + +struct iommu_platform_data { + const char *name; + const char *clk_name; + const int nr_tlb_entries; +}; + +#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 iommu_arch_version(void); + +extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e); +extern u32 iotlb_cr_to_virt(struct cr_regs *cr); + +extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e); +extern void flush_iotlb_page(struct iommu *obj, u32 da); +extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end); +extern void flush_iotlb_all(struct iommu *obj); + +extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e); +extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova); + +extern struct iommu *iommu_get(const char *name); +extern void iommu_put(struct iommu *obj); + +extern void iommu_save_ctx(struct iommu *obj); +extern void iommu_restore_ctx(struct iommu *obj); + +extern int install_iommu_arch(const struct iommu_functions *ops); +extern void uninstall_iommu_arch(const struct iommu_functions *ops); + +extern int foreach_iommu_device(void *data, + int (*fn)(struct device *, void *)); + +extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len); +extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len); + +#endif /* __MACH_IOMMU_H */ |