6ae1574c2a
ifetch While currently only used to fetch the original instruction on failure for getting the instruction length code, we should make the page table walking code future proof. Suggested-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
|
|
* Copyright IBM Corp. 1999, 2009
|
|
*
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef __ASM_CTL_REG_H
|
|
#define __ASM_CTL_REG_H
|
|
|
|
#include <linux/bug.h>
|
|
|
|
#define __ctl_load(array, low, high) do { \
|
|
typedef struct { char _[sizeof(array)]; } addrtype; \
|
|
\
|
|
BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
|
|
asm volatile( \
|
|
" lctlg %1,%2,%0\n" \
|
|
: \
|
|
: "Q" (*(addrtype *)(&array)), "i" (low), "i" (high) \
|
|
: "memory"); \
|
|
} while (0)
|
|
|
|
#define __ctl_store(array, low, high) do { \
|
|
typedef struct { char _[sizeof(array)]; } addrtype; \
|
|
\
|
|
BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
|
|
asm volatile( \
|
|
" stctg %1,%2,%0\n" \
|
|
: "=Q" (*(addrtype *)(&array)) \
|
|
: "i" (low), "i" (high)); \
|
|
} while (0)
|
|
|
|
static inline void __ctl_set_bit(unsigned int cr, unsigned int bit)
|
|
{
|
|
unsigned long reg;
|
|
|
|
__ctl_store(reg, cr, cr);
|
|
reg |= 1UL << bit;
|
|
__ctl_load(reg, cr, cr);
|
|
}
|
|
|
|
static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit)
|
|
{
|
|
unsigned long reg;
|
|
|
|
__ctl_store(reg, cr, cr);
|
|
reg &= ~(1UL << bit);
|
|
__ctl_load(reg, cr, cr);
|
|
}
|
|
|
|
void smp_ctl_set_bit(int cr, int bit);
|
|
void smp_ctl_clear_bit(int cr, int bit);
|
|
|
|
union ctlreg0 {
|
|
unsigned long val;
|
|
struct {
|
|
unsigned long : 32;
|
|
unsigned long : 3;
|
|
unsigned long lap : 1; /* Low-address-protection control */
|
|
unsigned long : 4;
|
|
unsigned long edat : 1; /* Enhanced-DAT-enablement control */
|
|
unsigned long : 2;
|
|
unsigned long iep : 1; /* Instruction-Execution-Protection */
|
|
unsigned long : 1;
|
|
unsigned long afp : 1; /* AFP-register control */
|
|
unsigned long vx : 1; /* Vector enablement control */
|
|
unsigned long : 7;
|
|
unsigned long sssm : 1; /* Service signal subclass mask */
|
|
unsigned long : 9;
|
|
};
|
|
};
|
|
|
|
#ifdef CONFIG_SMP
|
|
# define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
|
|
# define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
|
|
#else
|
|
# define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
|
|
# define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
|
|
#endif
|
|
|
|
#endif /* __ASM_CTL_REG_H */
|