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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright 2016-17 IBM Corp.
*/
#include <asm/ppc-opcode.h>
#include <asm/reg.h>
/*
* Copy/paste instructions:
*
* copy RA,RB
* Copy contents of address (RA) + effective_address(RB)
* to internal copy-buffer.
*
* paste RA,RB
* Paste contents of internal copy-buffer to the address
* (RA) + effective_address(RB)
*/
static inline int vas_copy(void *crb, int offset)
{
asm volatile(PPC_COPY(%0, %1)";"
:
: "b" (offset), "b" (crb)
: "memory");
return 0;
}
static inline int vas_paste(void *paste_address, int offset)
{
u32 cr;
cr = 0;
asm volatile(PPC_PASTE(%1, %2)";"
"mfocrf %0, 0x80;"
: "=r" (cr)
: "b" (offset), "b" (paste_address)
: "memory", "cr0");
/* We mask with 0xE to ignore SO */
return (cr >> CR0_SHIFT) & 0xE;
}
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