mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 17:24:17 +08:00
7db54bfe44
Add hibernation (Suspend to Disk, aka ACPI S4) support for LoongArch. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <asm/fpu.h>
|
|
#include <asm/loongson.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <linux/suspend.h>
|
|
|
|
static u32 saved_crmd;
|
|
static u32 saved_prmd;
|
|
static u32 saved_euen;
|
|
static u32 saved_ecfg;
|
|
static u64 saved_pcpu_base;
|
|
struct pt_regs saved_regs;
|
|
|
|
void save_processor_state(void)
|
|
{
|
|
saved_crmd = csr_read32(LOONGARCH_CSR_CRMD);
|
|
saved_prmd = csr_read32(LOONGARCH_CSR_PRMD);
|
|
saved_euen = csr_read32(LOONGARCH_CSR_EUEN);
|
|
saved_ecfg = csr_read32(LOONGARCH_CSR_ECFG);
|
|
saved_pcpu_base = csr_read64(PERCPU_BASE_KS);
|
|
|
|
if (is_fpu_owner())
|
|
save_fp(current);
|
|
}
|
|
|
|
void restore_processor_state(void)
|
|
{
|
|
csr_write32(saved_crmd, LOONGARCH_CSR_CRMD);
|
|
csr_write32(saved_prmd, LOONGARCH_CSR_PRMD);
|
|
csr_write32(saved_euen, LOONGARCH_CSR_EUEN);
|
|
csr_write32(saved_ecfg, LOONGARCH_CSR_ECFG);
|
|
csr_write64(saved_pcpu_base, PERCPU_BASE_KS);
|
|
|
|
if (is_fpu_owner())
|
|
restore_fp(current);
|
|
}
|
|
|
|
int pfn_is_nosave(unsigned long pfn)
|
|
{
|
|
unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
|
|
unsigned long nosave_end_pfn = PFN_UP(__pa(&__nosave_end));
|
|
|
|
return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn);
|
|
}
|
|
|
|
extern int swsusp_asm_suspend(void);
|
|
|
|
int swsusp_arch_suspend(void)
|
|
{
|
|
enable_pci_wakeup();
|
|
return swsusp_asm_suspend();
|
|
}
|
|
|
|
extern int swsusp_asm_resume(void);
|
|
|
|
int swsusp_arch_resume(void)
|
|
{
|
|
/* Avoid TLB mismatch during and after kernel resume */
|
|
local_flush_tlb_all();
|
|
return swsusp_asm_resume();
|
|
}
|