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- /* 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)
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