// SPDX-License-Identifier: GPL-2.0 #include <asm/fpu.h> #include <asm/loongson.h> #include <asm/sections.h> #include <asm/time.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) { save_counter(); 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) { sync_counter(); 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(); }