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/* SPDX-License-Identifier: GPL-2.0 */
/*
* hibernate_asm.S: Hibernaton support specific for sparc64.
*
* Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
*/
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/cpudata.h>
#include <asm/page.h>
ENTRY(swsusp_arch_suspend)
save %sp, -128, %sp
save %sp, -128, %sp
flushw
setuw saved_context, %g3
/* Save window regs */
rdpr %cwp, %g2
stx %g2, [%g3 + SC_REG_CWP]
rdpr %wstate, %g2
stx %g2, [%g3 + SC_REG_WSTATE]
stx %fp, [%g3 + SC_REG_FP]
/* Save state regs */
rdpr %tick, %g2
stx %g2, [%g3 + SC_REG_TICK]
rdpr %pstate, %g2
stx %g2, [%g3 + SC_REG_PSTATE]
/* Save global regs */
stx %g4, [%g3 + SC_REG_G4]
stx %g5, [%g3 + SC_REG_G5]
stx %g6, [%g3 + SC_REG_G6]
call swsusp_save
nop
mov %o0, %i0
restore
mov %o0, %i0
ret
restore
ENTRY(swsusp_arch_resume)
/* Write restore_pblist to %l0 */
sethi %hi(restore_pblist), %l0
ldx [%l0 + %lo(restore_pblist)], %l0
call __flush_tlb_all
nop
/* Write PAGE_OFFSET to %g7 */
sethi %hi(PAGE_OFFSET), %g7
ldx [%g7 + %lo(PAGE_OFFSET)], %g7
setuw (PAGE_SIZE-8), %g3
/* Use MMU Bypass */
rd %asi, %g1
wr %g0, ASI_PHYS_USE_EC, %asi
ba fill_itlb
nop
pbe_loop:
cmp %l0, %g0
be restore_ctx
sub %l0, %g7, %l0
ldxa [%l0 ] %asi, %l1 /* address */
ldxa [%l0 + 8] %asi, %l2 /* orig_address */
/* phys addr */
sub %l1, %g7, %l1
sub %l2, %g7, %l2
mov %g3, %l3 /* PAGE_SIZE-8 */
copy_loop:
ldxa [%l1 + %l3] ASI_PHYS_USE_EC, %g2
stxa %g2, [%l2 + %l3] ASI_PHYS_USE_EC
cmp %l3, %g0
bne copy_loop
sub %l3, 8, %l3
/* next pbe */
ba pbe_loop
ldxa [%l0 + 16] %asi, %l0
restore_ctx:
setuw saved_context, %g3
/* Restore window regs */
wrpr %g0, 0, %canrestore
wrpr %g0, 0, %otherwin
wrpr %g0, 6, %cansave
wrpr %g0, 0, %cleanwin
ldxa [%g3 + SC_REG_CWP] %asi, %g2
wrpr %g2, %cwp
ldxa [%g3 + SC_REG_WSTATE] %asi, %g2
wrpr %g2, %wstate
ldxa [%g3 + SC_REG_FP] %asi, %fp
/* Restore state regs */
ldxa [%g3 + SC_REG_PSTATE] %asi, %g2
wrpr %g2, %pstate
ldxa [%g3 + SC_REG_TICK] %asi, %g2
wrpr %g2, %tick
/* Restore global regs */
ldxa [%g3 + SC_REG_G4] %asi, %g4
ldxa [%g3 + SC_REG_G5] %asi, %g5
ldxa [%g3 + SC_REG_G6] %asi, %g6
wr %g1, %g0, %asi
restore
restore
wrpr %g0, 14, %pil
retl
mov %g0, %o0
fill_itlb:
ba pbe_loop
wrpr %g0, 15, %pil
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