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/* SPDX-License-Identifier: GPL-2.0 / #ifndef _ASM_S390_NOSPEC_ASM_H #define _ASM_S390_NOSPEC_ASM_H #include <asm/alternative-asm.h> #include <asm/asm-offsets.h> #include <asm/dwarf.h> #ifdef __ASSEMBLY__ #ifdef CC_USING_EXPOLINE _LC_BR_R1 = __LC_BR_R1 / * The expoline macros are used to create thunks in the same format * as gcc generates them. The 'comdat' section flag makes sure that * the various thunks are merged into a single copy. / .macro __THUNK_PROLOG_NAME name #ifdef CONFIG_EXPOLINE_EXTERN .pushsection .text,"ax",@progbits .align 16,0x07 #else .pushsection .text.\name,"axG",@progbits,\name,comdat #endif .globl \name .hidden \name .type \name,@function \name: CFI_STARTPROC .endm .macro __THUNK_EPILOG_NAME name CFI_ENDPROC #ifdef CONFIG_EXPOLINE_EXTERN .size \name, .-\name #endif .popsection .endm #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES .macro __THUNK_PROLOG_BR r1,r2 __THUNK_PROLOG_NAME __s390_indirect_jump_r\r1 .endm .macro __THUNK_EPILOG_BR r1,r2 __THUNK_EPILOG_NAME __s390_indirect_jump_r\r1 .endm .macro __THUNK_BR r1,r2 jg __s390_indirect_jump_r\r1 .endm .macro __THUNK_BRASL r1,r2,r3 brasl \r1,__s390_indirect_jump_r\r2 .endm #else .macro __THUNK_PROLOG_BR r1,r2 __THUNK_PROLOG_NAME __s390_indirect_jump_r\r2\()use_r\r1 .endm .macro __THUNK_EPILOG_BR r1,r2 __THUNK_EPILOG_NAME __s390_indirect_jump_r\r2\()use_r\r1 .endm .macro __THUNK_BR r1,r2 jg __s390_indirect_jump_r\r2\()use_r\r1 .endm .macro __THUNK_BRASL r1,r2,r3 brasl \r1,__s390_indirect_jump_r\r3\()use_r\r2 .endm #endif .macro __DECODE_RR expand,reg,ruse .set __decode_fail,1 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \reg,%r\r1 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \ruse,%r\r2 \expand \r1,\r2 .set __decode_fail,0 .endif .endr .endif .endr .if __decode_fail == 1 .error "__DECODE_RR failed" .endif .endm .macro __DECODE_RRR expand,rsave,rtarget,ruse .set __decode_fail,1 .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \rsave,%r\r1 .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \rtarget,%r\r2 .irp r3,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 .ifc \ruse,%r\r3 \expand \r1,\r2,\r3 .set __decode_fail,0 .endif .endr .endif .endr .endif .endr .if __decode_fail == 1 .error "__DECODE_RRR failed" .endif .endm .macro __THUNK_EX_BR reg,ruse # Be very careful when adding instructions to this macro! # The ALTERNATIVE replacement code has a .+10 which targets # the "br \reg" after the code has been patched. #ifdef CONFIG_HAVE_MARCH_Z10_FEATURES exrl 0,555f j . #else .ifc \reg,%r1 ALTERNATIVE "ex %r0,_LC_BR_R1", ".insn ril,0xc60000000000,0,.+10", 35 j . .else larl \ruse,555f ex 0,0(\ruse) j . .endif #endif 555: br \reg .endm #ifdef CONFIG_EXPOLINE_EXTERN .macro GEN_BR_THUNK reg,ruse=%r1 .endm .macro GEN_BR_THUNK_EXTERN reg,ruse=%r1 #else .macro GEN_BR_THUNK reg,ruse=%r1 #endif __DECODE_RR __THUNK_PROLOG_BR,\reg,\ruse __THUNK_EX_BR \reg,\ruse __DECODE_RR __THUNK_EPILOG_BR,\reg,\ruse .endm .macro BR_EX reg,ruse=%r1 557: __DECODE_RR __THUNK_BR,\reg,\ruse .pushsection .s390_indirect_branches,"a",@progbits .long 557b-. .popsection .endm .macro BASR_EX rsave,rtarget,ruse=%r1 559: __DECODE_RRR __THUNK_BRASL,\rsave,\rtarget,\ruse .pushsection .s390_indirect_branches,"a",@progbits .long 559b-. .popsection .endm #else .macro GEN_BR_THUNK reg,ruse=%r1 .endm .macro BR_EX reg,ruse=%r1 br \reg .endm .macro BASR_EX rsave,rtarget,ruse=%r1 basr \rsave,\rtarget .endm #endif / CC_USING_EXPOLINE / #endif / __ASSEMBLY__ / #endif / _ASM_S390_NOSPEC_ASM_H */

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