1d09a307fSHeiko Carstens /* SPDX-License-Identifier: GPL-2.0 */ 2d09a307fSHeiko Carstens #ifndef __ASM_EXTABLE_H 3d09a307fSHeiko Carstens #define __ASM_EXTABLE_H 4d09a307fSHeiko Carstens 5d09a307fSHeiko Carstens #include <linux/stringify.h> 6454ede3fSHeiko Carstens #include <linux/bits.h> 7d09a307fSHeiko Carstens #include <asm/asm-const.h> 8d09a307fSHeiko Carstens 93d66718cSHeiko Carstens #define EX_TYPE_NONE 0 103d66718cSHeiko Carstens #define EX_TYPE_FIXUP 1 113d66718cSHeiko Carstens #define EX_TYPE_BPF 2 12454ede3fSHeiko Carstens #define EX_TYPE_UA_STORE 3 13454ede3fSHeiko Carstens #define EX_TYPE_UA_LOAD_MEM 4 14454ede3fSHeiko Carstens #define EX_TYPE_UA_LOAD_REG 5 15f39a8c4aSHeiko Carstens #define EX_TYPE_UA_LOAD_REGPAIR 6 16454ede3fSHeiko Carstens 17454ede3fSHeiko Carstens #define EX_DATA_REG_ERR_SHIFT 0 18454ede3fSHeiko Carstens #define EX_DATA_REG_ERR GENMASK(3, 0) 19454ede3fSHeiko Carstens 20454ede3fSHeiko Carstens #define EX_DATA_REG_ADDR_SHIFT 4 21454ede3fSHeiko Carstens #define EX_DATA_REG_ADDR GENMASK(7, 4) 22454ede3fSHeiko Carstens 23454ede3fSHeiko Carstens #define EX_DATA_LEN_SHIFT 8 24454ede3fSHeiko Carstens #define EX_DATA_LEN GENMASK(11, 8) 253d66718cSHeiko Carstens 263d66718cSHeiko Carstens #define __EX_TABLE(_section, _fault, _target, _type) \ 27d09a307fSHeiko Carstens stringify_in_c(.section _section,"a";) \ 28*27d45655SHeiko Carstens stringify_in_c(.balign 4;) \ 29d09a307fSHeiko Carstens stringify_in_c(.long (_fault) - .;) \ 30d09a307fSHeiko Carstens stringify_in_c(.long (_target) - .;) \ 313d66718cSHeiko Carstens stringify_in_c(.short (_type);) \ 323d66718cSHeiko Carstens stringify_in_c(.short 0;) \ 33d09a307fSHeiko Carstens stringify_in_c(.previous) 34d09a307fSHeiko Carstens 35454ede3fSHeiko Carstens #define __EX_TABLE_UA(_section, _fault, _target, _type, _regerr, _regaddr, _len)\ 36484a8ed8SHeiko Carstens stringify_in_c(.section _section,"a";) \ 37*27d45655SHeiko Carstens stringify_in_c(.balign 4;) \ 38484a8ed8SHeiko Carstens stringify_in_c(.long (_fault) - .;) \ 39484a8ed8SHeiko Carstens stringify_in_c(.long (_target) - .;) \ 40484a8ed8SHeiko Carstens stringify_in_c(.short (_type);) \ 41454ede3fSHeiko Carstens stringify_in_c(.macro extable_reg regerr, regaddr;) \ 4268a971acSHeiko Carstens stringify_in_c(.set .Lfound, 0;) \ 43454ede3fSHeiko Carstens stringify_in_c(.set .Lcurr, 0;) \ 44454ede3fSHeiko Carstens stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \ 45454ede3fSHeiko Carstens stringify_in_c( .ifc "\regerr", "%%r\rs";) \ 4668a971acSHeiko Carstens stringify_in_c( .set .Lfound, 1;) \ 47454ede3fSHeiko Carstens stringify_in_c( .set .Lregerr, .Lcurr;) \ 48484a8ed8SHeiko Carstens stringify_in_c( .endif;) \ 49454ede3fSHeiko Carstens stringify_in_c( .set .Lcurr, .Lcurr+1;) \ 50484a8ed8SHeiko Carstens stringify_in_c(.endr;) \ 5168a971acSHeiko Carstens stringify_in_c(.ifne (.Lfound != 1);) \ 52454ede3fSHeiko Carstens stringify_in_c( .error "extable_reg: bad register argument1";) \ 53484a8ed8SHeiko Carstens stringify_in_c(.endif;) \ 54454ede3fSHeiko Carstens stringify_in_c(.set .Lfound, 0;) \ 55454ede3fSHeiko Carstens stringify_in_c(.set .Lcurr, 0;) \ 56454ede3fSHeiko Carstens stringify_in_c(.irp rs,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15;) \ 57454ede3fSHeiko Carstens stringify_in_c( .ifc "\regaddr", "%%r\rs";) \ 58454ede3fSHeiko Carstens stringify_in_c( .set .Lfound, 1;) \ 59454ede3fSHeiko Carstens stringify_in_c( .set .Lregaddr, .Lcurr;) \ 60454ede3fSHeiko Carstens stringify_in_c( .endif;) \ 61454ede3fSHeiko Carstens stringify_in_c( .set .Lcurr, .Lcurr+1;) \ 62454ede3fSHeiko Carstens stringify_in_c(.endr;) \ 63454ede3fSHeiko Carstens stringify_in_c(.ifne (.Lfound != 1);) \ 64454ede3fSHeiko Carstens stringify_in_c( .error "extable_reg: bad register argument2";) \ 65454ede3fSHeiko Carstens stringify_in_c(.endif;) \ 66454ede3fSHeiko Carstens stringify_in_c(.short .Lregerr << EX_DATA_REG_ERR_SHIFT | \ 67454ede3fSHeiko Carstens .Lregaddr << EX_DATA_REG_ADDR_SHIFT | \ 68454ede3fSHeiko Carstens _len << EX_DATA_LEN_SHIFT;) \ 69484a8ed8SHeiko Carstens stringify_in_c(.endm;) \ 70454ede3fSHeiko Carstens stringify_in_c(extable_reg _regerr,_regaddr;) \ 71484a8ed8SHeiko Carstens stringify_in_c(.purgem extable_reg;) \ 72484a8ed8SHeiko Carstens stringify_in_c(.previous) 73484a8ed8SHeiko Carstens 74d09a307fSHeiko Carstens #define EX_TABLE(_fault, _target) \ 753d66718cSHeiko Carstens __EX_TABLE(__ex_table, _fault, _target, EX_TYPE_FIXUP) 76454ede3fSHeiko Carstens 77d09a307fSHeiko Carstens #define EX_TABLE_AMODE31(_fault, _target) \ 783d66718cSHeiko Carstens __EX_TABLE(.amode31.ex_table, _fault, _target, EX_TYPE_FIXUP) 79454ede3fSHeiko Carstens 80454ede3fSHeiko Carstens #define EX_TABLE_UA_STORE(_fault, _target, _regerr) \ 81454ede3fSHeiko Carstens __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_STORE, _regerr, _regerr, 0) 82454ede3fSHeiko Carstens 83454ede3fSHeiko Carstens #define EX_TABLE_UA_LOAD_MEM(_fault, _target, _regerr, _regmem, _len) \ 84454ede3fSHeiko Carstens __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_MEM, _regerr, _regmem, _len) 85454ede3fSHeiko Carstens 86454ede3fSHeiko Carstens #define EX_TABLE_UA_LOAD_REG(_fault, _target, _regerr, _regzero) \ 87454ede3fSHeiko Carstens __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REG, _regerr, _regzero, 0) 88d09a307fSHeiko Carstens 89f39a8c4aSHeiko Carstens #define EX_TABLE_UA_LOAD_REGPAIR(_fault, _target, _regerr, _regzero) \ 90f39a8c4aSHeiko Carstens __EX_TABLE_UA(__ex_table, _fault, _target, EX_TYPE_UA_LOAD_REGPAIR, _regerr, _regzero, 0) 91f39a8c4aSHeiko Carstens 92d09a307fSHeiko Carstens #endif /* __ASM_EXTABLE_H */ 93