Paul Mackerras <pau...@ozlabs.org> writes: > diff --git a/arch/powerpc/lib/quad.S b/arch/powerpc/lib/quad.S > new file mode 100644 > index 0000000..2cc77dc > --- /dev/null > +++ b/arch/powerpc/lib/quad.S > @@ -0,0 +1,62 @@ > +/* > + * Quadword loads and stores > + * for use in instruction emulation. > + * > + * Copyright 2017 Paul Mackerras, IBM Corp. <pau...@au1.ibm.com> > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License > + * as published by the Free Software Foundation; either version > + * 2 of the License, or (at your option) any later version. > + */ > + > +#include <asm/processor.h> > +#include <asm/ppc_asm.h> > +#include <asm/ppc-opcode.h> > +#include <asm/reg.h> > +#include <asm/asm-offsets.h> > +#include <linux/errno.h> > + > +/* do_lq(unsigned long ea, unsigned long *regs) */ > +_GLOBAL(do_lq) > +1: lq r6, 0(r3) > + std r6, 0(r4) > + std r7, 8(r4) > + li r3, 0 > + blr > +2: li r3, -EFAULT > + blr > + EX_TABLE(1b, 2b) > + > +/* do_stq(unsigned long ea, unsigned long val0, unsigned long val1) */ > +_GLOBAL(do_stq) > +1: stq r4, 0(r3) > + li r3, 0 > + blr > +2: li r3, -EFAULT > + blr > + EX_TABLE(1b, 2b) > + > +/* do_lqarx(unsigned long ea, unsigned long *regs) */ > +_GLOBAL(do_lqarx) > +1: lqarx r6, 0, r3
Older binutils barf on this, so we'll need to use a macro to generate it. > + std r6, 0(r4) > + std r7, 8(r4) > + li r3, 0 > + blr > +2: li r3, -EFAULT > + blr > + EX_TABLE(1b, 2b) > + > +/* do_stqcx(unsigned long ea, unsigned long val0, unsigned long val1, > + unsigned int *crp) */ > + > +_GLOBAL(do_stqcx) > +1: stqcx. r4, 0, r3 This too. eg: arch/powerpc/lib/quad.S:42: Error: Unrecognized opcode: `lqarx' arch/powerpc/lib/quad.S:55: Error: Unrecognized opcode: `stqcx.' cheers
