ioport.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * linux/arch/mips/kernel/ioport.c
- */
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/types.h>
- #include <linux/ioport.h>
- /*
- * This changes the io permissions bitmap in the current task.
- */
- asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int turn_on)
- {
- return -ENOSYS;
- }
- /*
- * sys_iopl has to be used when you want to access the IO ports
- * beyond the 0x3ff range: to get the full 65536 ports bitmapped
- * you'd need 8kB of bitmaps/process, which is a bit excessive.
- *
- * Here we just change the eflags value on the stack: we allow
- * only the super-user to do it. This depends on the stack-layout
- * on system-call entry - see also fork() and the signal handling
- * code.
- */
- asmlinkage int sys_iopl(long ebx,long ecx,long edx,
- long esi, long edi, long ebp, long eax, long ds,
- long es, long fs, long gs, long orig_eax,
- long eip,long cs,long eflags,long esp,long ss)
- {
- return -ENOSYS;
- }