Initial commit

include/l4/glue/tests/memory.h

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+/*
+ * Memory related definitions for test purposes.
+ *
+ * Copyright (C) 2007 Bahadir Balban
+ *
+ */
+#ifndef __GLUE_TEST_MEMORY_H__
+#define __GLUE_TEST_MEMORY_H__
+
+
+/* ARM specific definitions */
+#define TEST_SECTION_SIZE		SZ_1MB
+//#define TEST_PAGE_SIZE			SZ_4K
+//#define TEST_PAGE_MASK			0xFFF
+//#define TEST_PAGE_BITS			12
+#define TEST_PAGE_SIZE			128
+#define TEST_PAGE_MASK			(TEST_PAGE_SIZE-1)
+#define TEST_PAGE_BITS			7
+#define TEST_SECTION_MASK		0xFFFFF
+
+/* Aligns to the upper page (ceiling) */
+#define page_align_up(addr) 		((((unsigned int)(addr)) + \
+					  (PAGE_SIZE - 1)) & \
+					 (~PAGE_MASK))
+/* Aligns to the lower page (floor) */
+#define page_align(addr)		(((unsigned int)(addr)) &  \
+					 (~PAGE_MASK))
+
+/* Align to given size */
+#define	align(addr, size)		(((unsigned int)(addr)) & (~(size-1)))
+
+/* Extract page frame number from address */
+#define __pfn(x)		(((unsigned long)(x)) >> PAGE_BITS)
+#define __pfn_to_addr(x)	(((unsigned long)(x)) << PAGE_BITS)
+
+/* Extract physical address from page table entry (pte) */
+#define __pte_to_addr(x)	(((unsigned long)(x)) & ~PAGE_MASK)
+
+/* Minimum excess needed for word alignment */
+#define SZ_WORD				sizeof(unsigned long)
+#define WORD_BITS			32
+
+#define BITWISE_GETWORD(x)	((x) >> 5) /* Divide by 32 */
+#define	BITWISE_GETBIT(x)	(1 << ((x) % WORD_BITS))
+
+#define align_up(addr, size)		((((unsigned long)(addr)) + ((size) - 1)) & (~((size) - 1)))
+
+/* Generic definitions */
+extern unsigned int PAGE_SIZE;
+extern unsigned int PAGE_MASK;
+extern unsigned int PAGE_BITS;
+
+
+/* Type-checkable page table elements */
+typedef u32 pgd_t;
+typedef u32 pmd_t;
+typedef u32 pte_t;
+
+/* Page global directory made up of pgd_t entries */
+typedef struct pgd_table {
+	pgd_t entry[SZ_4K];
+} pgd_table_t;
+
+/* Page middle directory made up of pmd_t entries */
+typedef struct pmd_table {
+	pmd_t entry[256];
+} pmd_table_t;
+
+
+/* Number of pmd tables to describe all physical memory.
+ * TODO: Need more for IO etc. */
+#define NUM_PMD_TABLES	((PHYS_MEM_END - PHYS_MEM_START) / PAGE_SIZE) \
+			/ PMD_NUM_PAGES
+
+/* Page table related */
+extern pgd_table_t kspace;
+extern pmd_table_t pmd_tables[];
+extern unsigned long pmdtab_i;
+
+void paging_init(void);
+void init_clear_ptab(void);
+
+#endif /* __GLUE_TEST_MEMORY_H__ */
+