1 /* 2 * Copyright IBM Corp. 1999, 2009 3 * 4 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 5 */ 6 7 #ifndef __ASM_CTL_REG_H 8 #define __ASM_CTL_REG_H 9 10 #include <linux/bug.h> 11 12 #define __ctl_load(array, low, high) { \ 13 typedef struct { char _[sizeof(array)]; } addrtype; \ 14 \ 15 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\ 16 asm volatile( \ 17 " lctlg %1,%2,%0\n" \ 18 : : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high));\ 19 } 20 21 #define __ctl_store(array, low, high) { \ 22 typedef struct { char _[sizeof(array)]; } addrtype; \ 23 \ 24 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\ 25 asm volatile( \ 26 " stctg %1,%2,%0\n" \ 27 : "=Q" (*(addrtype *)(&array)) \ 28 : "i" (low), "i" (high)); \ 29 } 30 31 static inline void __ctl_set_bit(unsigned int cr, unsigned int bit) 32 { 33 unsigned long reg; 34 35 __ctl_store(reg, cr, cr); 36 reg |= 1UL << bit; 37 __ctl_load(reg, cr, cr); 38 } 39 40 static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit) 41 { 42 unsigned long reg; 43 44 __ctl_store(reg, cr, cr); 45 reg &= ~(1UL << bit); 46 __ctl_load(reg, cr, cr); 47 } 48 49 void __ctl_set_vx(void); 50 51 void smp_ctl_set_bit(int cr, int bit); 52 void smp_ctl_clear_bit(int cr, int bit); 53 54 union ctlreg0 { 55 unsigned long val; 56 struct { 57 unsigned long : 32; 58 unsigned long : 3; 59 unsigned long lap : 1; /* Low-address-protection control */ 60 unsigned long : 4; 61 unsigned long edat : 1; /* Enhanced-DAT-enablement control */ 62 unsigned long : 4; 63 unsigned long afp : 1; /* AFP-register control */ 64 unsigned long vx : 1; /* Vector enablement control */ 65 unsigned long : 17; 66 }; 67 }; 68 69 #ifdef CONFIG_SMP 70 # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit) 71 # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit) 72 #else 73 # define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit) 74 # define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit) 75 #endif 76 77 #endif /* __ASM_CTL_REG_H */ 78