mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 06:14:39 +01:00
Mike Rapoport
7c2763c423
nds32 has only two-level page tables and can use pgtable-nopmd and folding of the upper layers. Replace usage of include/asm-generic/4level-fixup.h and explicit definition of __PAGETABLE_PMD_FOLDED in nds32 with include/asm-generic/pgtable-nopmd.h and adjust page table manipulation macros and functions accordingly. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Cc: Anatoly Pugachev <[email protected]> Cc: Anton Ivanov <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Greentime Hu <[email protected]> Cc: Greg Ungerer <[email protected]> Cc: Helge Deller <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Jeff Dike <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Mark Salter <[email protected]> Cc: Matt Turner <[email protected]> Cc: Michal Simek <[email protected]> Cc: Peter Rosin <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rolf Eike Beer <[email protected]> Cc: Russell King <[email protected]> Cc: Russell King <[email protected]> Cc: Sam Creasey <[email protected]> Cc: Vincent Chen <[email protected]> Cc: Vineet Gupta <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2008-2017 Andes Technology Corporation
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#include <linux/init.h>
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#include <linux/suspend.h>
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#include <linux/device.h>
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#include <linux/printk.h>
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#include <asm/suspend.h>
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#include <nds32_intrinsic.h>
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unsigned int resume_addr;
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unsigned int *phy_addr_sp_tmp;
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static void nds32_suspend2ram(void)
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{
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pgd_t *pgdv;
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p4d_t *p4dv;
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pud_t *pudv;
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pmd_t *pmdv;
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pte_t *ptev;
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pgdv = (pgd_t *)__va((__nds32__mfsr(NDS32_SR_L1_PPTB) &
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L1_PPTB_mskBASE)) + pgd_index((unsigned int)cpu_resume);
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p4dv = p4d_offset(pgdv, (unsigned int)cpu_resume);
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pudv = pud_offset(p4dv, (unsigned int)cpu_resume);
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pmdv = pmd_offset(pudv, (unsigned int)cpu_resume);
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ptev = pte_offset_map(pmdv, (unsigned int)cpu_resume);
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resume_addr = ((*ptev) & TLB_DATA_mskPPN)
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| ((unsigned int)cpu_resume & 0x00000fff);
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suspend2ram();
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}
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static void nds32_suspend_cpu(void)
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{
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while (!(__nds32__mfsr(NDS32_SR_INT_PEND) & wake_mask))
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__asm__ volatile ("standby no_wake_grant\n\t");
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}
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static int nds32_pm_valid(suspend_state_t state)
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{
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switch (state) {
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case PM_SUSPEND_ON:
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case PM_SUSPEND_STANDBY:
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case PM_SUSPEND_MEM:
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return 1;
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default:
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return 0;
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}
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}
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static int nds32_pm_enter(suspend_state_t state)
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{
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pr_debug("%s:state:%d\n", __func__, state);
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switch (state) {
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case PM_SUSPEND_STANDBY:
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nds32_suspend_cpu();
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return 0;
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case PM_SUSPEND_MEM:
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nds32_suspend2ram();
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return 0;
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default:
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return -EINVAL;
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}
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}
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static const struct platform_suspend_ops nds32_pm_ops = {
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.valid = nds32_pm_valid,
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.enter = nds32_pm_enter,
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};
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static int __init nds32_pm_init(void)
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{
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pr_debug("Enter %s\n", __func__);
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suspend_set_ops(&nds32_pm_ops);
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return 0;
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}
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late_initcall(nds32_pm_init);
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