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 smp_ctl_set_bit(int cr, int bit); 50 void smp_ctl_clear_bit(int cr, int bit); 51 52 union ctlreg0 { 53 unsigned long val; 54 struct { 55 unsigned long : 32; 56 unsigned long : 3; 57 unsigned long lap : 1; /* Low-address-protection control */ 58 unsigned long : 4; 59 unsigned long edat : 1; /* Enhanced-DAT-enablement control */ 60 unsigned long : 23; 61 }; 62 }; 63 64 #ifdef CONFIG_SMP 65 # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit) 66 # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit) 67 #else 68 # define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit) 69 # define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit) 70 #endif 71 72 #endif /* __ASM_CTL_REG_H */ 73