/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2021 Western Digital Corporation or its affiliates. * Copyright (c) 2022 Ventana Micro Systems Inc. */ #include <linux/linkage.h> #include <linux/cfi_types.h> #include <asm/asm.h> #include <asm/asm-offsets.h> #include <asm/assembler.h> #include <asm/csr.h> #include <asm/xip_fixup.h> .text .altmacro .option norelax SYM_FUNC_START(__cpu_suspend_enter) /* Save registers (except A0 and T0-T6) */ REG_S ra, (SUSPEND_CONTEXT_REGS + PT_RA)(a0) REG_S sp, (SUSPEND_CONTEXT_REGS + PT_SP)(a0) REG_S gp, (SUSPEND_CONTEXT_REGS + PT_GP)(a0) REG_S tp, (SUSPEND_CONTEXT_REGS + PT_TP)(a0) REG_S s0, (SUSPEND_CONTEXT_REGS + PT_S0)(a0) REG_S s1, (SUSPEND_CONTEXT_REGS + PT_S1)(a0) REG_S a1, (SUSPEND_CONTEXT_REGS + PT_A1)(a0) REG_S a2, (SUSPEND_CONTEXT_REGS + PT_A2)(a0) REG_S a3, (SUSPEND_CONTEXT_REGS + PT_A3)(a0) REG_S a4, (SUSPEND_CONTEXT_REGS + PT_A4)(a0) REG_S a5, (SUSPEND_CONTEXT_REGS + PT_A5)(a0) REG_S a6, (SUSPEND_CONTEXT_REGS + PT_A6)(a0) REG_S a7, (SUSPEND_CONTEXT_REGS + PT_A7)(a0) REG_S s2, (SUSPEND_CONTEXT_REGS + PT_S2)(a0) REG_S s3, (SUSPEND_CONTEXT_REGS + PT_S3)(a0) REG_S s4, (SUSPEND_CONTEXT_REGS + PT_S4)(a0) REG_S s5, (SUSPEND_CONTEXT_REGS + PT_S5)(a0) REG_S s6, (SUSPEND_CONTEXT_REGS + PT_S6)(a0) REG_S s7, (SUSPEND_CONTEXT_REGS + PT_S7)(a0) REG_S s8, (SUSPEND_CONTEXT_REGS + PT_S8)(a0) REG_S s9, (SUSPEND_CONTEXT_REGS + PT_S9)(a0) REG_S s10, (SUSPEND_CONTEXT_REGS + PT_S10)(a0) REG_S s11, (SUSPEND_CONTEXT_REGS + PT_S11)(a0) /* Save CSRs */ csrr t0, CSR_EPC REG_S t0, (SUSPEND_CONTEXT_REGS + PT_EPC)(a0) csrr t0, CSR_STATUS REG_S t0, (SUSPEND_CONTEXT_REGS + PT_STATUS)(a0) csrr t0, CSR_TVAL REG_S t0, (SUSPEND_CONTEXT_REGS + PT_BADADDR)(a0) csrr t0, CSR_CAUSE REG_S t0, (SUSPEND_CONTEXT_REGS + PT_CAUSE)(a0) /* Return non-zero value */ li a0, 1 /* Return to C code */ ret SYM_FUNC_END(__cpu_suspend_enter) SYM_TYPED_FUNC_START(__cpu_resume_enter) /* Load the global pointer */ load_global_pointer #ifdef CONFIG_MMU /* Save A0 and A1 */ add t0, a0, zero add t1, a1, zero /* Enable MMU */ la a0, swapper_pg_dir XIP_FIXUP_OFFSET a0 call relocate_enable_mmu /* Restore A0 and A1 */ add a0, t0, zero add a1, t1, zero #endif /* Make A0 point to suspend context */ add a0, a1, zero /* Restore CSRs */ suspend_restore_csrs /* Restore registers (except A0 and T0-T6) */ suspend_restore_regs /* Return zero value */ add a0, zero, zero /* Return to C code */ ret SYM_FUNC_END(__cpu_resume_enter)