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/*
* linux/arch/arm/kernel/ioport.c
*
* IO permission support for ARM.
*/
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#ifdef CONFIG_CPU_32
asmlinkage int sys_iopl(unsigned long turn_on)
{
if (turn_on && !capable(CAP_SYS_RAWIO))
return -EPERM;
/*
* We only support an on_off approach
*/
modify_domain(DOMAIN_IO, turn_on ? DOMAIN_MANAGER : DOMAIN_CLIENT);
return 0;
}
#else
asmlinkage int sys_iopl(unsigned long turn_on)
{
return -ENOSYS;
}
#endif
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