os/linux-2.6-tag--devboard-R2_10-4/arch/cris/arch-v32/drivers/elphel/cxsdram.h

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// FILE NAME  : cxsdram.h
// read/write image and FPN buffers from SDRAM


int * x313_fpn_readline(int line, int ignore);
int x313_fpn_writeline(void);
ssize_t x313_fpn_read(struct file * file, char * buf, size_t count, loff_t *off);
ssize_t x313_fpn_write(struct file * file, const char * buf, size_t count, loff_t *off);
int * x313_frame_readline(int line);
ssize_t x313_frame_read(struct file * file, char * buf, size_t count, loff_t *off);
loff_t  x313_frame_lseek(struct file * file, loff_t offset, int orig);
void x313_frame_release(void); // was missing?
int x313_frame_open(struct inode *inode, struct file *filp);
int x313_fpn_open(struct inode *inode, struct file *filp);
loff_t  x313_fpn_lseek(struct file * file, loff_t offset, int orig);
void x313_fpn_release(void);
void x313_f_invalidate (void); // to be called when page number is changed. Write should not be in progress

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