mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-14 06:35:12 +00:00
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/1572938135-31886-8-git-send-email-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Anatoly Pugachev <matorola@gmail.com> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Peter Rosin <peda@axentia.se> Cc: Richard Weinberger <richard@nod.at> Cc: Rolf Eike Beer <eike-kernel@sf-tec.de> Cc: Russell King <linux@armlinux.org.uk> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Sam Creasey <sammy@sammy.net> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2008-2017 Andes Technology Corporation
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/device.h>
|
|
#include <linux/printk.h>
|
|
#include <asm/suspend.h>
|
|
#include <nds32_intrinsic.h>
|
|
|
|
unsigned int resume_addr;
|
|
unsigned int *phy_addr_sp_tmp;
|
|
|
|
static void nds32_suspend2ram(void)
|
|
{
|
|
pgd_t *pgdv;
|
|
p4d_t *p4dv;
|
|
pud_t *pudv;
|
|
pmd_t *pmdv;
|
|
pte_t *ptev;
|
|
|
|
pgdv = (pgd_t *)__va((__nds32__mfsr(NDS32_SR_L1_PPTB) &
|
|
L1_PPTB_mskBASE)) + pgd_index((unsigned int)cpu_resume);
|
|
|
|
p4dv = p4d_offset(pgdv, (unsigned int)cpu_resume);
|
|
pudv = pud_offset(p4dv, (unsigned int)cpu_resume);
|
|
pmdv = pmd_offset(pudv, (unsigned int)cpu_resume);
|
|
ptev = pte_offset_map(pmdv, (unsigned int)cpu_resume);
|
|
|
|
resume_addr = ((*ptev) & TLB_DATA_mskPPN)
|
|
| ((unsigned int)cpu_resume & 0x00000fff);
|
|
|
|
suspend2ram();
|
|
}
|
|
|
|
static void nds32_suspend_cpu(void)
|
|
{
|
|
while (!(__nds32__mfsr(NDS32_SR_INT_PEND) & wake_mask))
|
|
__asm__ volatile ("standby no_wake_grant\n\t");
|
|
}
|
|
|
|
static int nds32_pm_valid(suspend_state_t state)
|
|
{
|
|
switch (state) {
|
|
case PM_SUSPEND_ON:
|
|
case PM_SUSPEND_STANDBY:
|
|
case PM_SUSPEND_MEM:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int nds32_pm_enter(suspend_state_t state)
|
|
{
|
|
pr_debug("%s:state:%d\n", __func__, state);
|
|
switch (state) {
|
|
case PM_SUSPEND_STANDBY:
|
|
nds32_suspend_cpu();
|
|
return 0;
|
|
case PM_SUSPEND_MEM:
|
|
nds32_suspend2ram();
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static const struct platform_suspend_ops nds32_pm_ops = {
|
|
.valid = nds32_pm_valid,
|
|
.enter = nds32_pm_enter,
|
|
};
|
|
|
|
static int __init nds32_pm_init(void)
|
|
{
|
|
pr_debug("Enter %s\n", __func__);
|
|
suspend_set_ops(&nds32_pm_ops);
|
|
return 0;
|
|
}
|
|
late_initcall(nds32_pm_init);
|