Import of Linux/MIPS 1.3.0

1 files changed, 36 insertions, 0 deletions

diff --git a/arch/mips/kernel/ioport.c b/arch/mips/kernel/ioport.c
new file mode 100644
index 000000000..ff6c0d518
--- /dev/null
+++ b/arch/mips/kernel/ioport.c
@@ -0,0 +1,36 @@
+/*
+ * 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;
+}
+
+unsigned int *stack;
+
+/*
+ * 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;
+}