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// 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);
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