1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/gpu/mali400/r3p2/mali/common/mali_mmu_page_directory.h b/drivers/gpu/mali400/r3p2/mali/common/mali_mmu_page_directory.h
new file mode 100644
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--- /dev/null
+++ b/drivers/gpu/mali400/r3p2/mali/common/mali_mmu_page_directory.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2011-2012 ARM Limited. All rights reserved.
+ * 
+ * This program is free software and is provided to you under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
+ * 
+ * A copy of the licence is included with the program, and can also be obtained from Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __MALI_MMU_PAGE_DIRECTORY_H__
+#define __MALI_MMU_PAGE_DIRECTORY_H__
+
+#include "mali_osk.h"
+
+/**
+ * Size of an MMU page in bytes
+ */
+#define MALI_MMU_PAGE_SIZE 0x1000
+
+/*
+ * Size of the address space referenced by a page table page
+ */
+#define MALI_MMU_VIRTUAL_PAGE_SIZE 0x400000 /* 4 MiB */
+
+/**
+ * Page directory index from address
+ * Calculates the page directory index from the given address
+ */
+#define MALI_MMU_PDE_ENTRY(address) (((address)>>22) & 0x03FF)
+
+/**
+ * Page table index from address
+ * Calculates the page table index from the given address
+ */
+#define MALI_MMU_PTE_ENTRY(address) (((address)>>12) & 0x03FF)
+
+/**
+ * Extract the memory address from an PDE/PTE entry
+ */
+#define MALI_MMU_ENTRY_ADDRESS(value) ((value) & 0xFFFFFC00)
+
+#define MALI_INVALID_PAGE ((u32)(~0))
+
+/**
+ *
+ */
+typedef enum mali_mmu_entry_flags
+{
+	MALI_MMU_FLAGS_PRESENT = 0x01,
+	MALI_MMU_FLAGS_READ_PERMISSION = 0x02,
+	MALI_MMU_FLAGS_WRITE_PERMISSION = 0x04,
+	MALI_MMU_FLAGS_OVERRIDE_CACHE  = 0x8,
+	MALI_MMU_FLAGS_WRITE_CACHEABLE  = 0x10,
+	MALI_MMU_FLAGS_WRITE_ALLOCATE  = 0x20,
+	MALI_MMU_FLAGS_WRITE_BUFFERABLE  = 0x40,
+	MALI_MMU_FLAGS_READ_CACHEABLE  = 0x80,
+	MALI_MMU_FLAGS_READ_ALLOCATE  = 0x100,
+	MALI_MMU_FLAGS_MASK = 0x1FF,
+} mali_mmu_entry_flags;
+
+
+#define MALI_MMU_FLAGS_FORCE_GP_READ_ALLOCATE ( \
+MALI_MMU_FLAGS_PRESENT | \
+	MALI_MMU_FLAGS_READ_PERMISSION |  \
+	MALI_MMU_FLAGS_WRITE_PERMISSION | \
+	MALI_MMU_FLAGS_OVERRIDE_CACHE | \
+	MALI_MMU_FLAGS_WRITE_CACHEABLE | \
+	MALI_MMU_FLAGS_WRITE_BUFFERABLE | \
+	MALI_MMU_FLAGS_READ_CACHEABLE | \
+	MALI_MMU_FLAGS_READ_ALLOCATE )
+
+
+struct mali_page_directory
+{
+	u32 page_directory; /**< Physical address of the memory session's page directory */
+	mali_io_address page_directory_mapped; /**< Pointer to the mapped version of the page directory into the kernel's address space */
+
+	mali_io_address page_entries_mapped[1024]; /**< Pointers to the page tables which exists in the page directory mapped into the kernel's address space */
+	u32   page_entries_usage_count[1024]; /**< Tracks usage count of the page table pages, so they can be releases on the last reference */
+};
+
+/* Map Mali virtual address space (i.e. ensure page tables exist for the virtual range)  */
+_mali_osk_errcode_t mali_mmu_pagedir_map(struct mali_page_directory *pagedir, u32 mali_address, u32 size);
+_mali_osk_errcode_t mali_mmu_pagedir_unmap(struct mali_page_directory *pagedir, u32 mali_address, u32 size);
+
+/* Back virtual address space with actual pages. Assumes input is contiguous and 4k aligned. */
+void mali_mmu_pagedir_update(struct mali_page_directory *pagedir, u32 mali_address, u32 phys_address, u32 size, u32 cache_settings);
+
+u32 mali_page_directory_get_phys_address(struct mali_page_directory *pagedir, u32 index);
+
+u32 mali_allocate_empty_page(void);
+void mali_free_empty_page(u32 address);
+_mali_osk_errcode_t mali_create_fault_flush_pages(u32 *page_directory, u32 *page_table, u32 *data_page);
+void mali_destroy_fault_flush_pages(u32 *page_directory, u32 *page_table, u32 *data_page);
+
+struct mali_page_directory *mali_mmu_pagedir_alloc(void);
+void mali_mmu_pagedir_free(struct mali_page_directory *pagedir);
+
+#endif /* __MALI_MMU_PAGE_DIRECTORY_H__ */