12874c5fdSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */
22392c8c8SSukadev Bhattiprolu /*
32392c8c8SSukadev Bhattiprolu * Copyright 2016-17 IBM Corp.
42392c8c8SSukadev Bhattiprolu */
52392c8c8SSukadev Bhattiprolu #include <asm/ppc-opcode.h>
6ab3759b5SSimon Guo #include <asm/reg.h>
72392c8c8SSukadev Bhattiprolu
82392c8c8SSukadev Bhattiprolu /*
92392c8c8SSukadev Bhattiprolu * Copy/paste instructions:
102392c8c8SSukadev Bhattiprolu *
112392c8c8SSukadev Bhattiprolu * copy RA,RB
122392c8c8SSukadev Bhattiprolu * Copy contents of address (RA) + effective_address(RB)
132392c8c8SSukadev Bhattiprolu * to internal copy-buffer.
142392c8c8SSukadev Bhattiprolu *
152392c8c8SSukadev Bhattiprolu * paste RA,RB
162392c8c8SSukadev Bhattiprolu * Paste contents of internal copy-buffer to the address
172392c8c8SSukadev Bhattiprolu * (RA) + effective_address(RB)
182392c8c8SSukadev Bhattiprolu */
vas_copy(void * crb,int offset)192392c8c8SSukadev Bhattiprolu static inline int vas_copy(void *crb, int offset)
202392c8c8SSukadev Bhattiprolu {
212392c8c8SSukadev Bhattiprolu asm volatile(PPC_COPY(%0, %1)";"
222392c8c8SSukadev Bhattiprolu :
232392c8c8SSukadev Bhattiprolu : "b" (offset), "b" (crb)
242392c8c8SSukadev Bhattiprolu : "memory");
252392c8c8SSukadev Bhattiprolu
262392c8c8SSukadev Bhattiprolu return 0;
272392c8c8SSukadev Bhattiprolu }
282392c8c8SSukadev Bhattiprolu
vas_paste(void * paste_address,int offset)292392c8c8SSukadev Bhattiprolu static inline int vas_paste(void *paste_address, int offset)
302392c8c8SSukadev Bhattiprolu {
312392c8c8SSukadev Bhattiprolu u32 cr;
322392c8c8SSukadev Bhattiprolu
332392c8c8SSukadev Bhattiprolu cr = 0;
342392c8c8SSukadev Bhattiprolu asm volatile(PPC_PASTE(%1, %2)";"
352392c8c8SSukadev Bhattiprolu "mfocrf %0, 0x80;"
362392c8c8SSukadev Bhattiprolu : "=r" (cr)
372392c8c8SSukadev Bhattiprolu : "b" (offset), "b" (paste_address)
382392c8c8SSukadev Bhattiprolu : "memory", "cr0");
392392c8c8SSukadev Bhattiprolu
4075743649SHaren Myneni /* We mask with 0xE to ignore SO */
4175743649SHaren Myneni return (cr >> CR0_SHIFT) & 0xE;
422392c8c8SSukadev Bhattiprolu }
43