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/*
* Copyright (C) 2017-2019 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-20 zx.chen define default vector handlers.
*/
#include <csi_config.h>
#include <rtconfig.h>
#include <cpuport.h>
/* Enable interrupts when returning from the handler */
#define MSTATUS_PRV1 0x1880
.section .bss
.align 2
.globl g_trapstackalloc
.global g_trapstackbase
.global g_top_trapstack
g_trapstackalloc:
g_trapstackbase:
.space 768
g_top_trapstack:
.align 2
.globl g_trap_sp
.type g_trap_sp, object
g_trap_sp:
.long 0
.size g_trap_sp, .-g_trap_sp
irq_nested_level:
.long 0
#ifdef ARCH_RISCV_FPU
irq_mstatus_fs_flag:
.long 0
#endif
.text
.align 2
.global Default_IRQHandler
.weak Default_IRQHandler
.type Default_IRQHandler, %function
Default_IRQHandler:
ipush
#ifdef __riscv_flen
csrr t1, mstatus
srli t1, t1, 13
andi t1, t1, 0x3
la t3, irq_mstatus_fs_flag
sw t1, (t3)
li t0, 0x3
bne t1, t0, .F_RegNotSave1
addi sp, sp, -(20 * FREGBYTES)
FSTORE ft0, 0 * FREGBYTES(sp)
FSTORE ft1, 1 * FREGBYTES(sp)
FSTORE ft2, 2 * FREGBYTES(sp)
FSTORE ft3, 3 * FREGBYTES(sp)
FSTORE ft4, 4 * FREGBYTES(sp)
FSTORE ft5, 5 * FREGBYTES(sp)
FSTORE ft6, 6 * FREGBYTES(sp)
FSTORE ft7, 7 * FREGBYTES(sp)
FSTORE fa0, 8 * FREGBYTES(sp)
FSTORE fa1, 9 * FREGBYTES(sp)
FSTORE fa2, 10 * FREGBYTES(sp)
FSTORE fa3, 11 * FREGBYTES(sp)
FSTORE fa4, 12 * FREGBYTES(sp)
FSTORE fa5, 13 * FREGBYTES(sp)
FSTORE fa6, 14 * FREGBYTES(sp)
FSTORE fa7, 15 * FREGBYTES(sp)
FSTORE ft8, 16 * FREGBYTES(sp)
FSTORE ft9, 17 * FREGBYTES(sp)
FSTORE ft10, 18 * FREGBYTES(sp)
FSTORE ft11, 19 * FREGBYTES(sp)
.F_RegNotSave1:
#endif
csrr t1, mcause
andi t1, t1, 0x3FF
slli t1, t1, 2
la t0, g_irqvector
add t0, t0, t1
lw t2, (t0)
jalr t2
li t0, MSTATUS_PRV1
csrs mstatus, t0
#ifdef __riscv_flen
la t0, irq_mstatus_fs_flag
lw t1, (t0)
li t0, 0x3
bne t1, t0, .F_RegNotLoad
FLOAD ft0, 0 * FREGBYTES(sp)
FLOAD ft1, 1 * FREGBYTES(sp)
FLOAD ft2, 2 * FREGBYTES(sp)
FLOAD ft3, 3 * FREGBYTES(sp)
FLOAD ft4, 4 * FREGBYTES(sp)
FLOAD ft5, 5 * FREGBYTES(sp)
FLOAD ft6, 6 * FREGBYTES(sp)
FLOAD ft7, 7 * FREGBYTES(sp)
FLOAD fa0, 8 * FREGBYTES(sp)
FLOAD fa1, 9 * FREGBYTES(sp)
FLOAD fa2, 10 * FREGBYTES(sp)
FLOAD fa3, 11 * FREGBYTES(sp)
FLOAD fa4, 12 * FREGBYTES(sp)
FLOAD fa5, 13 * FREGBYTES(sp)
FLOAD fa6, 14 * FREGBYTES(sp)
FLOAD fa7, 15 * FREGBYTES(sp)
FLOAD ft8, 16 * FREGBYTES(sp)
FLOAD ft9, 17 * FREGBYTES(sp)
FLOAD ft10,18 * FREGBYTES(sp)
FLOAD ft11,19 * FREGBYTES(sp)
addi sp, sp, (20 * FREGBYTES)
.F_RegNotLoad:
#endif
ipop
/******************************************************************************
* Functions:
* void trap(void);
* default exception handler
******************************************************************************/
.align 2
.global trap
.type trap, %function
trap:
/* Check for interrupt */
j .
addi sp, sp, -4
sw t0, 0x0(sp)
csrr t0, mcause
blt t0, x0, .Lirq
addi sp, sp, 4
la t0, g_trap_sp
addi t0, t0, -132
sw x1, 0(t0)
sw x2, 4(t0)
sw x3, 8(t0)
sw x4, 12(t0)
sw x6, 20(t0)
sw x7, 24(t0)
sw x8, 28(t0)
sw x9, 32(t0)
sw x10, 36(t0)
sw x11, 40(t0)
sw x12, 44(t0)
sw x13, 48(t0)
sw x14, 52(t0)
sw x15, 56(t0)
sw x16, 60(t0)
sw x17, 64(t0)
sw x18, 68(t0)
sw x19, 72(t0)
sw x20, 76(t0)
sw x21, 80(t0)
sw x22, 84(t0)
sw x23, 88(t0)
sw x24, 92(t0)
sw x25, 96(t0)
sw x26, 100(t0)
sw x27, 104(t0)
sw x28, 108(t0)
sw x29, 112(t0)
sw x30, 116(t0)
sw x31, 120(t0)
csrr a0, mepc
sw a0, 124(t0)
csrr a0, mstatus
sw a0, 128(t0)
mv a0, t0
lw t0, -4(sp)
mv sp, a0
sw t0, 16(sp)
jal trap_c
.Lirq:
lw t0, 0x0(sp)
addi sp, sp, 4
j Default_IRQHandler
.align 6
.weak Default_Handler
.global Default_Handler
.type Default_Handler, %function
Default_Handler:
/* Check for nmi */
addi sp, sp, -8
sw t0, 0x0(sp)
sw t1, 0x4(sp)
csrr t0, mcause
andi t0, t0, 0x3FF
li t1, 24
beq t0, t1, .NMI_Handler
lw t0, 0x0(sp)
lw t1, 0x4(sp)
addi sp, sp, 8
j trap
.NMI_Handler:
lw t0, 0x0(sp)
lw t1, 0x4(sp)
addi sp, sp, 8
addi sp, sp, -64
sw ra, 0(sp)
sw t0, 4(sp)
sw t1, 8(sp)
sw t2, 12(sp)
sw a0, 16(sp)
sw a1, 20(sp)
sw a2, 24(sp)
sw a3, 28(sp)
sw a4, 32(sp)
sw a5, 36(sp)
sw a6, 40(sp)
sw a7, 44(sp)
sw t3, 48(sp)
sw t4, 52(sp)
sw t5, 56(sp)
sw t6, 60(sp)
#ifdef __riscv_flen
addi sp, sp, -(20*FREGBYTES)
FSTORE ft0, 0 * FREGBYTES(sp)
FSTORE ft1, 1 * FREGBYTES(sp)
FSTORE ft2, 2 * FREGBYTES(sp)
FSTORE ft3, 3 * FREGBYTES(sp)
FSTORE ft4, 4 * FREGBYTES(sp)
FSTORE ft5, 5 * FREGBYTES(sp)
FSTORE ft6, 6 * FREGBYTES(sp)
FSTORE ft7, 7 * FREGBYTES(sp)
FSTORE fa0, 8 * FREGBYTES(sp)
FSTORE fa1, 9 * FREGBYTES(sp)
FSTORE fa2, 10 * FREGBYTES(sp)
FSTORE fa3, 11 * FREGBYTES(sp)
FSTORE fa4, 12 * FREGBYTES(sp)
FSTORE fa5, 13 * FREGBYTES(sp)
FSTORE fa6, 14 * FREGBYTES(sp)
FSTORE fa7, 15 * FREGBYTES(sp)
FSTORE ft8, 16 * FREGBYTES(sp)
FSTORE ft9, 17 * FREGBYTES(sp)
FSTORE ft10, 18 * FREGBYTES(sp)
FSTORE ft11, 19 * FREGBYTES(sp)
#endif
la t0, g_nmivector
lw t0, (t0)
jalr t0
#ifdef __riscv_flen
FLOAD ft0, 0 * FREGBYTES(sp)
FLOAD ft1, 1 * FREGBYTES(sp)
FLOAD ft2, 2 * FREGBYTES(sp)
FLOAD ft3, 3 * FREGBYTES(sp)
FLOAD ft4, 4 * FREGBYTES(sp)
FLOAD ft5, 5 * FREGBYTES(sp)
FLOAD ft6, 6 * FREGBYTES(sp)
FLOAD ft7, 7 * FREGBYTES(sp)
FLOAD fa0, 8 * FREGBYTES(sp)
FLOAD fa1, 9 * FREGBYTES(sp)
FLOAD fa2, 10 * FREGBYTES(sp)
FLOAD fa3, 11 * FREGBYTES(sp)
FLOAD fa4, 12 * FREGBYTES(sp)
FLOAD fa5, 13 * FREGBYTES(sp)
FLOAD fa6, 14 * FREGBYTES(sp)
FLOAD fa7, 15 * FREGBYTES(sp)
FLOAD ft8, 16 * FREGBYTES(sp)
FLOAD ft9, 17 * FREGBYTES(sp)
FLOAD ft10, 18 * FREGBYTES(sp)
FLOAD ft11, 19 * FREGBYTES(sp)
addi sp, sp, (20 * FREGBYTES)
#endif
lw ra, 0(sp)
lw t0, 4(sp)
lw t1, 8(sp)
lw t2, 12(sp)
lw a0, 16(sp)
lw a1, 20(sp)
lw a2, 24(sp)
lw a3, 28(sp)
lw a4, 32(sp)
lw a5, 36(sp)
lw a6, 40(sp)
lw a7, 44(sp)
lw t3, 48(sp)
lw t4, 52(sp)
lw t5, 56(sp)
lw t6, 60(sp)
addi sp, sp, 64
mret
.size Default_Handler, . - Default_Handler
/* Macro to define default handlers. Default handler
* will be weak symbol and just dead loops. They can be
* overwritten by other handlers */
.macro def_irq_handler handler_name
.weak \handler_name
.globl \handler_name
.set \handler_name, Default_Handler
.endm
def_irq_handler PendSV_Handler
def_irq_handler SysTick_Handler
def_irq_handler STIM0_IRQHandler
def_irq_handler STIM1_IRQHandler
def_irq_handler STIM2_IRQHandler
def_irq_handler STIM3_IRQHandler
def_irq_handler TIM0_IRQHandler
def_irq_handler TIM1_IRQHandler
def_irq_handler TIM2_IRQHandler
def_irq_handler TIM3_IRQHandler
def_irq_handler USART_IRQHandler
def_irq_handler GPIO0_IRQHandler
def_irq_handler GPIO1_IRQHandler
def_irq_handler GPIO2_IRQHandler
def_irq_handler GPIO3_IRQHandler
def_irq_handler GPIO4_IRQHandler
def_irq_handler GPIO5_IRQHandler
def_irq_handler GPIO6_IRQHandler
def_irq_handler GPIO7_IRQHandler
def_irq_handler PAD_IRQHandler
def_irq_handler TIM6_IRQHandler
def_irq_handler TIM7_IRQHandler
def_irq_handler TIM8_IRQHandler
def_irq_handler TIM9_IRQHandler
def_irq_handler TIM10_IRQHandler
def_irq_handler TIM11_IRQHandler
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