2 * contains various random system calls that have a non-standard
3 * calling sequence on the Linux/Blackfin platform.
5 * Copyright 2004-2009 Analog Devices Inc.
7 * Licensed under the GPL-2 or later
10 #include <linux/spinlock.h>
11 #include <linux/sem.h>
12 #include <linux/msg.h>
13 #include <linux/shm.h>
14 #include <linux/syscalls.h>
15 #include <linux/mman.h>
16 #include <linux/file.h>
18 #include <linux/uaccess.h>
19 #include <linux/ipc.h>
20 #include <linux/unistd.h>
22 #include <asm/cacheflush.h>
24 #include <asm/cachectl.h>
25 #include <asm/ptrace.h>
27 asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
29 return sram_alloc_with_lsl(size, flags);
32 asmlinkage int sys_sram_free(const void *addr)
34 return sram_free_with_lsl(addr);
37 asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
39 return safe_dma_memcpy(dest, src, len);
42 #if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE)
44 unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
45 unsigned long len, unsigned long pgoff, unsigned long flags)
47 struct fb_info *info = filp->private_data;
48 return (unsigned long)info->screen_base;
50 EXPORT_SYMBOL(get_fb_unmapped_area);
53 /* Needed for legacy userspace atomic emulation */
54 static DEFINE_SPINLOCK(bfin_spinlock_lock);
56 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
57 __attribute__((l1_text))
59 asmlinkage int sys_bfin_spinlock(int *p)
63 spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
64 ret = get_user(tmp, p);
65 if (likely(ret == 0)) {
71 spin_unlock(&bfin_spinlock_lock);
76 SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, int, op)
78 if (is_user_addr_valid(current, addr, len) != 0)
82 blackfin_dcache_flush_range(addr, addr + len);
84 blackfin_icache_flush_range(addr, addr + len);