1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 1999, 2009 4 * 5 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> 6 */ 7 8 #ifndef __ASM_CTL_REG_H 9 #define __ASM_CTL_REG_H 10 11 #include <linux/bug.h> 12 13 #define __ctl_load(array, low, high) do { \ 14 typedef struct { char _[sizeof(array)]; } addrtype; \ 15 \ 16 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\ 17 asm volatile( \ 18 " lctlg %1,%2,%0\n" \ 19 : \ 20 : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high) \ 21 : "memory"); \ 22 } while (0) 23 24 #define __ctl_store(array, low, high) do { \ 25 typedef struct { char _[sizeof(array)]; } addrtype; \ 26 \ 27 BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\ 28 asm volatile( \ 29 " stctg %1,%2,%0\n" \ 30 : "=Q" (*(addrtype *)(&array)) \ 31 : "i" (low), "i" (high)); \ 32 } while (0) 33 34 static inline void __ctl_set_bit(unsigned int cr, unsigned int bit) 35 { 36 unsigned long reg; 37 38 __ctl_store(reg, cr, cr); 39 reg |= 1UL << bit; 40 __ctl_load(reg, cr, cr); 41 } 42 43 static inline void __ctl_clear_bit(unsigned int cr, unsigned int bit) 44 { 45 unsigned long reg; 46 47 __ctl_store(reg, cr, cr); 48 reg &= ~(1UL << bit); 49 __ctl_load(reg, cr, cr); 50 } 51 52 void smp_ctl_set_bit(int cr, int bit); 53 void smp_ctl_clear_bit(int cr, int bit); 54 55 union ctlreg0 { 56 unsigned long val; 57 struct { 58 unsigned long : 32; 59 unsigned long : 3; 60 unsigned long lap : 1; /* Low-address-protection control */ 61 unsigned long : 4; 62 unsigned long edat : 1; /* Enhanced-DAT-enablement control */ 63 unsigned long : 2; 64 unsigned long iep : 1; /* Instruction-Execution-Protection */ 65 unsigned long : 1; 66 unsigned long afp : 1; /* AFP-register control */ 67 unsigned long vx : 1; /* Vector enablement control */ 68 unsigned long : 7; 69 unsigned long sssm : 1; /* Service signal subclass mask */ 70 unsigned long : 9; 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