diff options
Diffstat (limited to 'arch/blackfin/kernel/sys_bfin.c')
| -rw-r--r-- | arch/blackfin/kernel/sys_bfin.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/sys_bfin.c b/arch/blackfin/kernel/sys_bfin.c index 2e7f8e10bf8..d998383cb95 100644 --- a/arch/blackfin/kernel/sys_bfin.c +++ b/arch/blackfin/kernel/sys_bfin.c @@ -21,6 +21,8 @@ #include <asm/cacheflush.h> #include <asm/dma.h> +#include <asm/cachectl.h> +#include <asm/ptrace.h> asmlinkage void *sys_sram_alloc(size_t size, unsigned long flags) { @@ -39,6 +41,7 @@ asmlinkage void *sys_dma_memcpy(void *dest, const void *src, size_t len) #if defined(CONFIG_FB) || defined(CONFIG_FB_MODULE) #include <linux/fb.h> +#include <linux/export.h> unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) { @@ -47,3 +50,39 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, } EXPORT_SYMBOL(get_fb_unmapped_area); #endif + +/* Needed for legacy userspace atomic emulation */ +static DEFINE_SPINLOCK(bfin_spinlock_lock); + +#ifdef CONFIG_SYS_BFIN_SPINLOCK_L1 +__attribute__((l1_text)) +#endif +asmlinkage int sys_bfin_spinlock(int *p) +{ + int ret, tmp = 0; + + spin_lock(&bfin_spinlock_lock); /* This would also hold kernel preemption. */ + ret = get_user(tmp, p); + if (likely(ret == 0)) { + if (unlikely(tmp)) + ret = 1; + else + put_user(1, p); + } + spin_unlock(&bfin_spinlock_lock); + + return ret; +} + +SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, int, op) +{ + if (is_user_addr_valid(current, addr, len) != 0) + return -EINVAL; + + if (op & DCACHE) + blackfin_dcache_flush_range(addr, addr + len); + if (op & ICACHE) + blackfin_icache_flush_range(addr, addr + len); + + return 0; +} |