root/arch/powerpc/lib/quad.S

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Quadword loads and stores
   4  * for use in instruction emulation.
   5  *
   6  * Copyright 2017 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
   7  */
   8 
   9 #include <asm/processor.h>
  10 #include <asm/ppc_asm.h>
  11 #include <asm/ppc-opcode.h>
  12 #include <asm/reg.h>
  13 #include <asm/asm-offsets.h>
  14 #include <linux/errno.h>
  15 
  16 /* do_lq(unsigned long ea, unsigned long *regs) */
  17 _GLOBAL(do_lq)
  18 1:      lq      r6, 0(r3)
  19         std     r6, 0(r4)
  20         std     r7, 8(r4)
  21         li      r3, 0
  22         blr
  23 2:      li      r3, -EFAULT
  24         blr
  25         EX_TABLE(1b, 2b)
  26 
  27 /* do_stq(unsigned long ea, unsigned long val0, unsigned long val1) */
  28 _GLOBAL(do_stq)
  29 1:      stq     r4, 0(r3)
  30         li      r3, 0
  31         blr
  32 2:      li      r3, -EFAULT
  33         blr
  34         EX_TABLE(1b, 2b)
  35 
  36 /* do_lqarx(unsigned long ea, unsigned long *regs) */
  37 _GLOBAL(do_lqarx)
  38 1:      PPC_LQARX(6, 0, 3, 0)
  39         std     r6, 0(r4)
  40         std     r7, 8(r4)
  41         li      r3, 0
  42         blr
  43 2:      li      r3, -EFAULT
  44         blr
  45         EX_TABLE(1b, 2b)
  46 
  47 /* do_stqcx(unsigned long ea, unsigned long val0, unsigned long val1,
  48             unsigned int *crp) */
  49 
  50 _GLOBAL(do_stqcx)
  51 1:      PPC_STQCX(4, 0, 3)
  52         mfcr    r5
  53         stw     r5, 0(r6)
  54         li      r3, 0
  55         blr
  56 2:      li      r3, -EFAULT
  57         blr
  58         EX_TABLE(1b, 2b)