diff options
Diffstat (limited to 'arch/sh/kernel/sys_sh.c')
| -rw-r--r-- | arch/sh/kernel/sys_sh.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c index 90d00e47264..ec65dd8842b 100644 --- a/arch/sh/kernel/sys_sh.c +++ b/arch/sh/kernel/sys_sh.c @@ -25,6 +25,8 @@ #include <asm/syscalls.h> #include <asm/uaccess.h> #include <asm/unistd.h> +#include <asm/cacheflush.h> +#include <asm/cachectl.h> static inline long do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, @@ -179,6 +181,47 @@ asmlinkage int sys_ipc(uint call, int first, int second, return -EINVAL; } +/* sys_cacheflush -- flush (part of) the processor cache. */ +asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op) +{ + struct vm_area_struct *vma; + + if ((op < 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I))) + return -EINVAL; + + /* + * Verify that the specified address region actually belongs + * to this process. + */ + if (addr + len < addr) + return -EFAULT; + + down_read(¤t->mm->mmap_sem); + vma = find_vma (current->mm, addr); + if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) { + up_read(¤t->mm->mmap_sem); + return -EFAULT; + } + + switch (op & CACHEFLUSH_D_PURGE) { + case CACHEFLUSH_D_INVAL: + __flush_invalidate_region((void *)addr, len); + break; + case CACHEFLUSH_D_WB: + __flush_wback_region((void *)addr, len); + break; + case CACHEFLUSH_D_PURGE: + __flush_purge_region((void *)addr, len); + break; + } + + if (op & CACHEFLUSH_I) + flush_cache_all(); + + up_read(¤t->mm->mmap_sem); + return 0; +} + asmlinkage int sys_uname(struct old_utsname __user *name) { int err; |