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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/testing/selftests/kvm/lib/riscv/handlers.S
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * Copyright (c) 2023 Intel Corporation

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 */

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#ifndef __ASSEMBLY__

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#define __ASSEMBLY__

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#endif

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#include <asm/csr.h>

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.macro save_context

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	addi  sp, sp, (-8*36)

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	sd    x1, 8(sp)

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	sd    x2, 16(sp)

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	sd    x3, 24(sp)

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	sd    x4, 32(sp)

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	sd    x5, 40(sp)

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	sd    x6, 48(sp)

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	sd    x7, 56(sp)

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	sd    x8, 64(sp)

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	sd    x9, 72(sp)

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	sd    x10, 80(sp)

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	sd    x11, 88(sp)

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	sd    x12, 96(sp)

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	sd    x13, 104(sp)

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	sd    x14, 112(sp)

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	sd    x15, 120(sp)

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	sd    x16, 128(sp)

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	sd    x17, 136(sp)

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	sd    x18, 144(sp)

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	sd    x19, 152(sp)

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	sd    x20, 160(sp)

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	sd    x21, 168(sp)

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	sd    x22, 176(sp)

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	sd    x23, 184(sp)

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	sd    x24, 192(sp)

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	sd    x25, 200(sp)

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	sd    x26, 208(sp)

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	sd    x27, 216(sp)

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	sd    x28, 224(sp)

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	sd    x29, 232(sp)

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	sd    x30, 240(sp)

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	sd    x31, 248(sp)

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	csrr  s0, CSR_SEPC

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	csrr  s1, CSR_SSTATUS

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	csrr  s2, CSR_STVAL

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	csrr  s3, CSR_SCAUSE

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	sd    s0, 0(sp)

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	sd    s1, 256(sp)

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	sd    s2, 264(sp)

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	sd    s3, 272(sp)

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.endm

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.macro restore_context

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	ld    s3, 272(sp)

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	ld    s2, 264(sp)

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	ld    s1, 256(sp)

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	ld    s0, 0(sp)

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	csrw  CSR_SCAUSE, s3

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	csrw  CSR_SSTATUS, s1

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	csrw  CSR_SEPC, s0

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	ld    x31, 248(sp)

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	ld    x30, 240(sp)

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	ld    x29, 232(sp)

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	ld    x28, 224(sp)

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	ld    x27, 216(sp)

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	ld    x26, 208(sp)

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	ld    x25, 200(sp)

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	ld    x24, 192(sp)

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	ld    x23, 184(sp)

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	ld    x22, 176(sp)

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	ld    x21, 168(sp)

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	ld    x20, 160(sp)

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	ld    x19, 152(sp)

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	ld    x18, 144(sp)

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	ld    x17, 136(sp)

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	ld    x16, 128(sp)

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	ld    x15, 120(sp)

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	ld    x14, 112(sp)

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	ld    x13, 104(sp)

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	ld    x12, 96(sp)

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	ld    x11, 88(sp)

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	ld    x10, 80(sp)

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	ld    x9, 72(sp)

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	ld    x8, 64(sp)

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	ld    x7, 56(sp)

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	ld    x6, 48(sp)

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	ld    x5, 40(sp)

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	ld    x4, 32(sp)

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	ld    x3, 24(sp)

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	ld    x2, 16(sp)

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	ld    x1, 8(sp)

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	addi  sp, sp, (8*36)

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.endm

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.balign 4

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.global exception_vectors

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exception_vectors:

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	save_context

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	move  a0, sp

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	call  route_exception

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	restore_context

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	sret

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