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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
|
|
