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 #ifdef CONFIG_64BIT 13 # define __CTL_LOAD "lctlg" 14 # define __CTL_STORE "stctg" 15 #else 16 # define __CTL_LOAD "lctl" 17 # define __CTL_STORE "stctl" 18 #endif 19 20 #define __ctl_load(array, low, high) { \ 21 typedef struct { char _[sizeof(array)]; } addrtype; \ 22 \ 23 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\ 24 asm volatile( \ 25 __CTL_LOAD " %1,%2,%0\n" \ 26 : : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high));\ 27 } 28 29 #define __ctl_store(array, low, high) { \ 30 typedef struct { char _[sizeof(array)]; } addrtype; \ 31 \ 32 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\ 33 asm volatile( \ 34 __CTL_STORE " %1,%2,%0\n" \ 35 : "=Q" (*(addrtype *)(&array)) \ 36 : "i" (low), "i" (high)); \ 37 } 38 39 static inline void __ctl_set_bit(unsigned int cr, unsigned int bit) 40 { 41 unsigned long reg; 42 43 __ctl_store(reg, cr, cr); 44 reg |= 1UL << bit; 45 __ctl_load(reg, cr, cr); 46 } 47 48 static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit) 49 { 50 unsigned long reg; 51 52 __ctl_store(reg, cr, cr); 53 reg &= ~(1UL << bit); 54 __ctl_load(reg, cr, cr); 55 } 56 57 void smp_ctl_set_bit(int cr, int bit); 58 void smp_ctl_clear_bit(int cr, int bit); 59 60 union ctlreg0 { 61 unsigned long val; 62 struct { 63 #ifdef CONFIG_64BIT 64 unsigned long : 32; 65 #endif 66 unsigned long : 3; 67 unsigned long lap : 1; /* Low-address-protection control */ 68 unsigned long : 4; 69 unsigned long edat : 1; /* Enhanced-DAT-enablement control */ 70 unsigned long : 23; 71 }; 72 }; 73 74 #ifdef CONFIG_SMP 75 # define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit) 76 # define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit) 77 #else 78 # define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit) 79 # define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit) 80 #endif 81 82 #endif /* __ASM_CTL_REG_H */ 83