| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2023 StarFive Technology Co., Ltd. |
| * |
| * Author: Jee Heng Sia <jeeheng.sia@starfivetech.com> |
| */ |
| |
| #ifndef __ASSEMBLY__ |
| #error "Only include this from assembly code" |
| #endif |
| |
| #ifndef __ASM_ASSEMBLER_H |
| #define __ASM_ASSEMBLER_H |
| |
| #include <asm/asm.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/csr.h> |
| |
| /* |
| * suspend_restore_csrs - restore CSRs |
| */ |
| .macro suspend_restore_csrs |
| REG_L t0, (SUSPEND_CONTEXT_REGS + PT_EPC)(a0) |
| csrw CSR_EPC, t0 |
| REG_L t0, (SUSPEND_CONTEXT_REGS + PT_STATUS)(a0) |
| csrw CSR_STATUS, t0 |
| REG_L t0, (SUSPEND_CONTEXT_REGS + PT_BADADDR)(a0) |
| csrw CSR_TVAL, t0 |
| REG_L t0, (SUSPEND_CONTEXT_REGS + PT_CAUSE)(a0) |
| csrw CSR_CAUSE, t0 |
| .endm |
| |
| /* |
| * suspend_restore_regs - Restore registers (except A0 and T0-T6) |
| */ |
| .macro suspend_restore_regs |
| REG_L ra, (SUSPEND_CONTEXT_REGS + PT_RA)(a0) |
| REG_L sp, (SUSPEND_CONTEXT_REGS + PT_SP)(a0) |
| REG_L gp, (SUSPEND_CONTEXT_REGS + PT_GP)(a0) |
| REG_L tp, (SUSPEND_CONTEXT_REGS + PT_TP)(a0) |
| REG_L s0, (SUSPEND_CONTEXT_REGS + PT_S0)(a0) |
| REG_L s1, (SUSPEND_CONTEXT_REGS + PT_S1)(a0) |
| REG_L a1, (SUSPEND_CONTEXT_REGS + PT_A1)(a0) |
| REG_L a2, (SUSPEND_CONTEXT_REGS + PT_A2)(a0) |
| REG_L a3, (SUSPEND_CONTEXT_REGS + PT_A3)(a0) |
| REG_L a4, (SUSPEND_CONTEXT_REGS + PT_A4)(a0) |
| REG_L a5, (SUSPEND_CONTEXT_REGS + PT_A5)(a0) |
| REG_L a6, (SUSPEND_CONTEXT_REGS + PT_A6)(a0) |
| REG_L a7, (SUSPEND_CONTEXT_REGS + PT_A7)(a0) |
| REG_L s2, (SUSPEND_CONTEXT_REGS + PT_S2)(a0) |
| REG_L s3, (SUSPEND_CONTEXT_REGS + PT_S3)(a0) |
| REG_L s4, (SUSPEND_CONTEXT_REGS + PT_S4)(a0) |
| REG_L s5, (SUSPEND_CONTEXT_REGS + PT_S5)(a0) |
| REG_L s6, (SUSPEND_CONTEXT_REGS + PT_S6)(a0) |
| REG_L s7, (SUSPEND_CONTEXT_REGS + PT_S7)(a0) |
| REG_L s8, (SUSPEND_CONTEXT_REGS + PT_S8)(a0) |
| REG_L s9, (SUSPEND_CONTEXT_REGS + PT_S9)(a0) |
| REG_L s10, (SUSPEND_CONTEXT_REGS + PT_S10)(a0) |
| REG_L s11, (SUSPEND_CONTEXT_REGS + PT_S11)(a0) |
| .endm |
| |
| /* |
| * copy_page - copy 1 page (4KB) of data from source to destination |
| * @a0 - destination |
| * @a1 - source |
| */ |
| .macro copy_page a0, a1 |
| lui a2, 0x1 |
| add a2, a2, a0 |
| 1 : |
| REG_L t0, 0(a1) |
| REG_L t1, SZREG(a1) |
| |
| REG_S t0, 0(a0) |
| REG_S t1, SZREG(a0) |
| |
| addi a0, a0, 2 * SZREG |
| addi a1, a1, 2 * SZREG |
| bne a2, a0, 1b |
| .endm |
| |
| #endif /* __ASM_ASSEMBLER_H */ |
