83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*
|
|
* contains various random system calls that have a non-standard
|
|
* calling sequence on the Linux/Blackfin platform.
|
|
*
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later
|
|
*/
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/file.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/unistd.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/dma.h>
|
|
|
|
/* common code for old and new mmaps */
|
|
static inline long
|
|
do_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
int error = -EBADF;
|
|
struct file *file = NULL;
|
|
|
|
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
|
|
if (!(flags & MAP_ANONYMOUS)) {
|
|
file = fget(fd);
|
|
if (!file)
|
|
goto out;
|
|
}
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
if (file)
|
|
fput(file);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
return do_mmap2(addr, len, prot, flags, fd, pgoff);
|
|
}
|
|
|
|
asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
|
|
{
|
|
return sram_alloc_with_lsl(size, flags);
|
|
}
|
|
|
|
asmlinkage int sys_sram_free(const void *addr)
|
|
{
|
|
return sram_free_with_lsl(addr);
|
|
}
|
|
|
|
asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
|
|
{
|
|
return safe_dma_memcpy(dest, src, len);
|
|
}
|
|
|
|
#if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE)
|
|
#include <linux/fb.h>
|
|
unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
|
|
unsigned long len, unsigned long pgoff, unsigned long flags)
|
|
{
|
|
struct fb_info *info = filp->private_data;
|
|
return (unsigned long)info->screen_base;
|
|
}
|
|
EXPORT_SYMBOL(get_fb_unmapped_area);
|
|
#endif
|