bdde6b3c8b
This patch adds CONFIG_HIBERNATION support for sparc64 architecture. The suspend function is the same as on another platforms. The restore function uses Bypass feature of MMU which allows to make the process more comfortable and plesant. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> CC: David Miller <davem@davemloft.net> CC: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
131 lines
2.2 KiB
ArmAsm
131 lines
2.2 KiB
ArmAsm
/*
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* hibernate_asm.S: Hibernaton support specific for sparc64.
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*
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* Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru)
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*/
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#include <linux/linkage.h>
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#include <asm/asm-offsets.h>
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#include <asm/cpudata.h>
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#include <asm/page.h>
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ENTRY(swsusp_arch_suspend)
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save %sp, -128, %sp
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save %sp, -128, %sp
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flushw
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setuw saved_context, %g3
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/* Save window regs */
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rdpr %cwp, %g2
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stx %g2, [%g3 + SC_REG_CWP]
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rdpr %wstate, %g2
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stx %g2, [%g3 + SC_REG_WSTATE]
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stx %fp, [%g3 + SC_REG_FP]
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/* Save state regs */
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rdpr %tick, %g2
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stx %g2, [%g3 + SC_REG_TICK]
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rdpr %pstate, %g2
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stx %g2, [%g3 + SC_REG_PSTATE]
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/* Save global regs */
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stx %g4, [%g3 + SC_REG_G4]
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stx %g5, [%g3 + SC_REG_G5]
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stx %g6, [%g3 + SC_REG_G6]
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call swsusp_save
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nop
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mov %o0, %i0
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restore
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mov %o0, %i0
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ret
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restore
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ENTRY(swsusp_arch_resume)
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/* Write restore_pblist to %l0 */
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sethi %hi(restore_pblist), %l0
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ldx [%l0 + %lo(restore_pblist)], %l0
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call __flush_tlb_all
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nop
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/* Write PAGE_OFFSET to %g7 */
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sethi %uhi(PAGE_OFFSET), %g7
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sllx %g7, 32, %g7
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setuw (PAGE_SIZE-8), %g3
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/* Use MMU Bypass */
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rd %asi, %g1
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wr %g0, ASI_PHYS_USE_EC, %asi
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ba fill_itlb
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nop
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pbe_loop:
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cmp %l0, %g0
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be restore_ctx
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sub %l0, %g7, %l0
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ldxa [%l0 ] %asi, %l1 /* address */
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ldxa [%l0 + 8] %asi, %l2 /* orig_address */
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/* phys addr */
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sub %l1, %g7, %l1
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sub %l2, %g7, %l2
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mov %g3, %l3 /* PAGE_SIZE-8 */
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copy_loop:
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ldxa [%l1 + %l3] ASI_PHYS_USE_EC, %g2
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stxa %g2, [%l2 + %l3] ASI_PHYS_USE_EC
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cmp %l3, %g0
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bne copy_loop
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sub %l3, 8, %l3
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/* next pbe */
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ba pbe_loop
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ldxa [%l0 + 16] %asi, %l0
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restore_ctx:
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setuw saved_context, %g3
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/* Restore window regs */
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wrpr %g0, 0, %canrestore
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wrpr %g0, 0, %otherwin
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wrpr %g0, 6, %cansave
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wrpr %g0, 0, %cleanwin
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ldxa [%g3 + SC_REG_CWP] %asi, %g2
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wrpr %g2, %cwp
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ldxa [%g3 + SC_REG_WSTATE] %asi, %g2
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wrpr %g2, %wstate
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ldxa [%g3 + SC_REG_FP] %asi, %fp
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/* Restore state regs */
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ldxa [%g3 + SC_REG_PSTATE] %asi, %g2
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wrpr %g2, %pstate
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ldxa [%g3 + SC_REG_TICK] %asi, %g2
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wrpr %g2, %tick
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/* Restore global regs */
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ldxa [%g3 + SC_REG_G4] %asi, %g4
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ldxa [%g3 + SC_REG_G5] %asi, %g5
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ldxa [%g3 + SC_REG_G6] %asi, %g6
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wr %g1, %g0, %asi
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restore
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restore
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wrpr %g0, 14, %pil
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retl
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mov %g0, %o0
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fill_itlb:
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ba pbe_loop
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wrpr %g0, 15, %pil
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