1 /*
2 * contains various random system calls that have a non-standard
3 * calling sequence on the Linux/Blackfin platform.
4 *
5 * Copyright 2004-2009 Analog Devices Inc.
6 *
7 * Licensed under the GPL-2 or later
8 */
9
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>
17 #include <linux/fs.h>
18 #include <linux/uaccess.h>
19 #include <linux/ipc.h>
20 #include <linux/unistd.h>
21
22 #include <asm/cacheflush.h>
23 #include <asm/dma.h>
24 #include <asm/cachectl.h>
25 #include <asm/ptrace.h>
26
sys_sram_alloc(size_t size,unsigned long flags)27 asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags)
28 {
29 return sram_alloc_with_lsl(size, flags);
30 }
31
sys_sram_free(const void * addr)32 asmlinkage int sys_sram_free(const void *addr)
33 {
34 return sram_free_with_lsl(addr);
35 }
36
sys_dma_memcpy(void * dest,const void * src,size_t len)37 asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len)
38 {
39 return safe_dma_memcpy(dest, src, len);
40 }
41
42 #if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE)
43 #include <linux/fb.h>
44 #include <linux/export.h>
get_fb_unmapped_area(struct file * filp,unsigned long orig_addr,unsigned long len,unsigned long pgoff,unsigned long flags)45 unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr,
46 unsigned long len, unsigned long pgoff, unsigned long flags)
47 {
48 struct fb_info *info = filp->private_data;
49 return (unsigned long)info->screen_base;
50 }
51 EXPORT_SYMBOL(get_fb_unmapped_area);
52 #endif
53
54 /* Needed for legacy userspace atomic emulation */
55 static DEFINE_SPINLOCK(bfin_spinlock_lock);
56
57 #ifdef CONFIG_SYS_BFIN_SPINLOCK_L1
58 __attribute__((l1_text))
59 #endif
sys_bfin_spinlock(int * p)60 asmlinkage int sys_bfin_spinlock(int *p)
61 {
62 int ret, tmp = 0;
63
64 spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */
65 ret = get_user(tmp, p);
66 if (likely(ret == 0)) {
67 if (unlikely(tmp))
68 ret = 1;
69 else
70 put_user(1, p);
71 }
72 spin_unlock(&bfin_spinlock_lock);
73
74 return ret;
75 }
76
SYSCALL_DEFINE3(cacheflush,unsigned long,addr,unsigned long,len,int,op)77 SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, int, op)
78 {
79 if (is_user_addr_valid(current, addr, len) != 0)
80 return -EINVAL;
81
82 if (op & DCACHE)
83 blackfin_dcache_flush_range(addr, addr + len);
84 if (op & ICACHE)
85 blackfin_icache_flush_range(addr, addr + len);
86
87 return 0;
88 }
89