add directory Linux-0.98

Linux-0.98/Yggdrasil-0.98.3/usr/include/linux/mm.h

@@ -0,0 +1,157 @@
+#ifndef _LINUX_MM_H
+#define _LINUX_MM_H
+
+#define PAGE_SIZE 4096
+#define PAGE_SHIFT 12
+
+#include <linux/fs.h>
+#include <linux/kernel.h>
+
+/*
+ * Linux kernel virtual memory manager primitives.
+ * The idea being to have a "virtual" mm in the same way
+ * we have a virtual fs - giving a cleaner interface to the
+ * mm details, and allowing different kinds of memory mappings
+ * (from shared memory to executable loading to arbitrary
+ * mmap() functions).
+ */
+
+/*
+ * This struct defines a memory VMM memory area. There is one of these
+ * per VM-area/task.  A VM area is any part of the process virtual memory
+ * space that has a special rule for the page-fault handlers (ie a shared
+ * library, the executable area etc).
+ */
+struct vm_area_struct {
+	struct task_struct * vm_task;		/* VM area parameters */
+	unsigned long vm_start;
+	unsigned long vm_end;
+	struct vm_area_struct * vm_next;	/* linked list */
+	struct vm_area_struct * vm_share;	/* linked list */
+	struct inode * vm_inode;
+	unsigned long vm_offset;
+	struct vm_operations_struct * vm_ops;
+};
+
+/*
+ * These are the virtual MM functions - opening of an area, closing it (needed to
+ * keep files on disk up-to-date etc), pointer to the functions called when a
+ * no-page or a wp-page exception occurs, and the function which decides on sharing
+ * of pages between different processes.
+ */
+struct vm_operations_struct {
+	void (*open)(struct vm_area_struct * area);
+	void (*close)(struct vm_area_struct * area);
+	void (*nopage)(struct vm_area_struct * area, unsigned long address);
+	void (*wppage)(struct vm_area_struct * area, unsigned long address);
+	int (*share)(struct vm_area_struct * old, struct vm_area_struct * new, unsigned long address);
+};
+
+/*
+ * BAD_PAGE is the page that is used for page faults when linux
+ * is out-of-memory. Older versions of linux just did a
+ * do_exit(), but using this instead means there is less risk
+ * for a process dying in kernel mode, possibly leaving a inode
+ * unused etc..
+ *
+ * BAD_PAGETABLE is the accompanying page-table: it is initialized
+ * to point to BAD_PAGE entries.
+ */
+extern unsigned long inline __bad_page(void)
+{
+	extern char empty_bad_page[PAGE_SIZE];
+
+	__asm__ __volatile__("cld ; rep ; stosl"
+		::"a" (0),
+		  "D" ((long) empty_bad_page),
+		  "c" (1024)
+		:"di","cx");
+	return (unsigned long) empty_bad_page;
+}
+#define BAD_PAGE __bad_page()
+
+extern unsigned long inline __bad_pagetable(void)
+{
+	extern char empty_bad_page_table[PAGE_SIZE];
+
+	__asm__ __volatile__("cld ; rep ; stosl"
+		::"a" (7+BAD_PAGE),
+		  "D" ((long) empty_bad_page_table),
+		  "c" (1024)
+		:"di","cx");
+	return (unsigned long) empty_bad_page_table;
+}
+#define BAD_PAGETABLE __bad_pagetable()
+
+extern volatile short free_page_ptr; /* used by malloc and tcp/ip. */
+
+extern int nr_free_pages;
+extern unsigned long free_page_list;
+extern int nr_secondary_pages;
+extern unsigned long secondary_page_list;
+
+#define MAX_SECONDARY_PAGES 10
+
+extern void rw_swap_page(int rw, unsigned int nr, char * buf);
+
+#define read_swap_page(nr,buf) \
+	rw_swap_page(READ,(nr),(buf))
+#define write_swap_page(nr,buf) \
+	rw_swap_page(WRITE,(nr),(buf))
+
+/* mmap.c */
+
+/* memory.c */
+	
+extern unsigned long get_free_page(int priority);
+extern unsigned long put_dirty_page(struct task_struct * tsk,unsigned long page,
+	unsigned long address);
+extern void free_page(unsigned long addr);
+extern void free_page_tables(struct task_struct * tsk);
+extern void clear_page_tables(struct task_struct * tsk);
+extern int copy_page_tables(struct task_struct * new);
+extern int unmap_page_range(unsigned long from, unsigned long size);
+extern int remap_page_range(unsigned long from, unsigned long to, unsigned long size,
+	 int permiss);
+extern void write_verify(unsigned long address);
+
+extern void do_wp_page(unsigned long error_code, unsigned long address,
+	struct task_struct *tsk, unsigned long user_esp);
+extern void do_no_page(unsigned long error_code, unsigned long address,
+	struct task_struct *tsk, unsigned long user_esp);
+
+extern unsigned long paging_init(unsigned long start_mem, unsigned long end_mem);
+extern void mem_init(unsigned long low_start_mem,
+		     unsigned long start_mem, unsigned long end_mem);
+extern void show_mem(void);
+extern void do_page_fault(unsigned long *esp, unsigned long error_code);
+extern void oom(struct task_struct * task);
+
+/* swap.c */
+
+extern void swap_free(unsigned int page_nr);
+extern void swap_duplicate(unsigned int page_nr);
+extern void swap_in(unsigned long *table_ptr);
+
+#define invalidate() \
+__asm__ __volatile__("movl %%cr3,%%eax\n\tmovl %%eax,%%cr3":::"ax")
+
+extern unsigned long high_memory;
+
+#define MAP_NR(addr) ((addr) >> PAGE_SHIFT)
+#define MAP_PAGE_RESERVED (1<<15)
+
+extern unsigned short * mem_map;
+
+#define PAGE_DIRTY	0x40
+#define PAGE_ACCESSED	0x20
+#define PAGE_USER	0x04
+#define PAGE_RW		0x02
+#define PAGE_PRESENT	0x01
+
+#define GFP_BUFFER	0x00
+#define GFP_ATOMIC	0x01
+#define GFP_USER	0x02
+#define GFP_KERNEL	0x03
+
+#endif