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启用中断，开始调中断软件

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This commit is contained in:
RuigeLee
2024-10-28 18:01:25 +08:00
parent ce18e90304
commit 7bcd0aaca0
6 changed files with 52 additions and 304 deletions
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9
Makefile
View File

@@ -88,10 +88,15 @@ sw:
riscv64-unknown-elf-objcopy -O binary ./tb/sw/build/test.elf ./tb/sw/build/test.bin
riscv64-unknown-elf-objdump --disassemble-all --disassemble-zeroes --section=.text --section=.text.startup --section=.text.init --section=.data --section=.bss --section=.rodata ./tb/sw/build/test.elf > ./tb/sw/build/test.dump
# riscv64-unknown-elf-objdump -h ./tb/sw/build/test.elf > ./tb/sw/build/test.dump
riscv64-unknown-elf-objdump --disassemble-all --disassemble-zeroes --section=.text --section=.text.startup --section=.text.init --section=.data --section=.bss --section=.rodata --section=.trap_entry ./tb/sw/build/test.elf > ./tb/sw/build/test.dump
riscv64-unknown-elf-objcopy -O verilog ./tb/sw/build/test.elf ./tb/sw/build/test.verilog
# riscv64-unknown-elf-objcopy --add-section .trap_entry=./tb/sw/build/test.bin ./tb/sw/build/test.elf ./tb/sw/build/test_with_section.elf
riscv64-unknown-elf-readelf -a ./tb/sw/build/test.elf
riscv64-unknown-elf-objcopy --add-section .trap_entry=./tb/sw/build/test.bin ./tb/sw/build/test.elf ./tb/sw/build/test_with_section.elf
riscv64-unknown-elf-objcopy -O verilog ./tb/sw/build/test.elf ./tb/sw/build/test.verilog
sed -i 's/@800/@000/g' ./tb/sw/build/test.verilog
fst:

6
src/main/resources/picorv32.v
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@@ -74,15 +74,15 @@ module picorv32 #(
parameter [ 0:0] ENABLE_MUL = 0,
parameter [ 0:0] ENABLE_FAST_MUL = 0,
parameter [ 0:0] ENABLE_DIV = 0,
parameter [ 0:0] ENABLE_IRQ = 0,
parameter [ 0:0] ENABLE_IRQ_QREGS = 1,
parameter [ 0:0] ENABLE_IRQ = 1,
parameter [ 0:0] ENABLE_IRQ_QREGS = 0,
parameter [ 0:0] ENABLE_IRQ_TIMER = 1,
parameter [ 0:0] ENABLE_TRACE = 0,
parameter [ 0:0] REGS_INIT_ZERO = 0,
parameter [31:0] MASKED_IRQ = 32'h 0000_0000,
parameter [31:0] LATCHED_IRQ = 32'h ffff_ffff,
parameter [31:0] PROGADDR_RESET = 32'h 8000_0000,
parameter [31:0] PROGADDR_IRQ = 32'h 0000_0010,
parameter [31:0] PROGADDR_IRQ = 32'h 8000_0800,
parameter [31:0] STACKADDR = 32'h ffff_ffff
) (
input clk, resetn,

2
src/main/scala/backBoard/pico/picorv32.scala
View File

@@ -10,7 +10,7 @@ import chisel3.experimental._
class picorv32 extends BlackBox() with HasBlackBoxResource {
val io = IO(new Bundle {
val clk = Input(Bool())
val resetn = Input(Bool())
val resetn = Input(Bool())
val trap = Output(Bool())
val mem_valid = Output(Bool())

3
tb/sw/linker.lds
View File

@@ -36,4 +36,7 @@ SECTIONS
*(.rodata*)
_RODATA_END_ = .;
}
. = 0x80000800;
.trap_entry : { *(.trap_entry)}
}

20
tb/sw/src/main.S
View File

@@ -25,19 +25,21 @@ main:
li x6, 32 # 设置循环次数
1:
beqz x15, 2f # 如果x10为0，则跳到2
beqz x15, 3f # 如果x10为0，则跳到3
2:
li x15, 0 # 清标志位
lw x7, 0(x5) # 读取cdr_0_tx_status的值
andi x7, x7, 0x2 # 检查第1比特（位1）
beqz x7, 1b # 如果第1比特为0，则回到1处继续循环
2:
# 向cdr_0_tx_txFifo地址写入0x55，循环32次
sw x6, 8(x5) # 向cdr_0_tx_txFifo写入0x55
addi x6, x6, -1 # 递减计数器
bnez x6, 1b # 如果计数器不为0，则继续循环
beqz x7, 2b # 如果第1比特为0，则回到2处继续循环
3:
j 3b
# 向cdr_0_tx_txFifo地址写入0x55，循环32次
sw x6, 8(x5) # 向cdr_0_tx_txFifo写入0x55
addi x6, x6, -1 # 递减计数器
bnez x6, 1b # 如果计数器不为0，则继续循环
4:
j 4b

320
tb/sw/src/startup.S
View File

@@ -3,314 +3,52 @@
#include "custom_ops.S"
.extern main
.globl _prog_start
.section .text.init
.section .text
.globl _prog_start
.global irq
.extern main
/* Interrupt handler
**********************************/
_prog_start:
li x15, 0
picorv32_maskirq_insn(zero, zero)
call main
.balign 16
irq_vec:
/* save registers */
picorv32_setq_insn(q2, x1)
picorv32_setq_insn(q3, x2)
lui x1, %hi(irq_regs)
addi x1, x1, %lo(irq_regs)
picorv32_getq_insn(x2, q0)
sw x2, 0*4(x1)
picorv32_getq_insn(x2, q2)
sw x2, 1*4(x1)
picorv32_getq_insn(x2, q3)
sw x2, 2*4(x1)
#ifdef ENABLE_FASTIRQ
sw x5, 5*4(x1)
sw x6, 6*4(x1)
sw x7, 7*4(x1)
sw x10, 10*4(x1)
sw x11, 11*4(x1)
sw x12, 12*4(x1)
sw x13, 13*4(x1)
sw x14, 14*4(x1)
sw x15, 15*4(x1)
sw x16, 16*4(x1)
sw x17, 17*4(x1)
sw x28, 28*4(x1)
sw x29, 29*4(x1)
sw x30, 30*4(x1)
sw x31, 31*4(x1)
#else
sw x3, 3*4(x1)
sw x4, 4*4(x1)
sw x5, 5*4(x1)
sw x6, 6*4(x1)
sw x7, 7*4(x1)
sw x8, 8*4(x1)
sw x9, 9*4(x1)
sw x10, 10*4(x1)
sw x11, 11*4(x1)
sw x12, 12*4(x1)
sw x13, 13*4(x1)
sw x14, 14*4(x1)
sw x15, 15*4(x1)
sw x16, 16*4(x1)
sw x17, 17*4(x1)
sw x18, 18*4(x1)
sw x19, 19*4(x1)
sw x20, 20*4(x1)
sw x21, 21*4(x1)
sw x22, 22*4(x1)
sw x23, 23*4(x1)
sw x24, 24*4(x1)
sw x25, 25*4(x1)
sw x26, 26*4(x1)
sw x27, 27*4(x1)
sw x28, 28*4(x1)
sw x29, 29*4(x1)
sw x30, 30*4(x1)
sw x31, 31*4(x1)
#endif
li gp, 1;
ecall
/* call interrupt handler C function */
lui sp, %hi(irq_stack)
addi sp, sp, %lo(irq_stack)
// arg0 = address of regs
lui a0, %hi(irq_regs)
addi a0, a0, %lo(irq_regs)
// arg1 = interrupt type
picorv32_getq_insn(a1, q1)
// call to C function
# jal ra, irq
/* restore registers */
// new irq_regs address returned from C code in a0
addi x1, a0, 0
lw x2, 0*4(x1)
picorv32_setq_insn(q0, x2)
lw x2, 1*4(x1)
picorv32_setq_insn(q1, x2)
lw x2, 2*4(x1)
picorv32_setq_insn(q2, x2)
#ifdef ENABLE_FASTIRQ
lw x5, 5*4(x1)
lw x6, 6*4(x1)
lw x7, 7*4(x1)
lw x10, 10*4(x1)
lw x11, 11*4(x1)
lw x12, 12*4(x1)
lw x13, 13*4(x1)
lw x14, 14*4(x1)
lw x15, 15*4(x1)
lw x16, 16*4(x1)
lw x17, 17*4(x1)
lw x28, 28*4(x1)
lw x29, 29*4(x1)
lw x30, 30*4(x1)
lw x31, 31*4(x1)
#else
lw x3, 3*4(x1)
lw x4, 4*4(x1)
lw x5, 5*4(x1)
lw x6, 6*4(x1)
lw x7, 7*4(x1)
lw x8, 8*4(x1)
lw x9, 9*4(x1)
lw x10, 10*4(x1)
lw x11, 11*4(x1)
lw x12, 12*4(x1)
lw x13, 13*4(x1)
lw x14, 14*4(x1)
lw x15, 15*4(x1)
lw x16, 16*4(x1)
lw x17, 17*4(x1)
lw x18, 18*4(x1)
lw x19, 19*4(x1)
lw x20, 20*4(x1)
lw x21, 21*4(x1)
lw x22, 22*4(x1)
lw x23, 23*4(x1)
lw x24, 24*4(x1)
lw x25, 25*4(x1)
lw x26, 26*4(x1)
lw x27, 27*4(x1)
lw x28, 28*4(x1)
lw x29, 29*4(x1)
lw x30, 30*4(x1)
lw x31, 31*4(x1)
#endif
picorv32_getq_insn(x1, q1)
picorv32_getq_insn(x2, q2)
.balign 32
.section .trap_entry
trap_entry:
# q0 return address
# q1 bitmask of all IRQ to be handled, may be more than one IRQ
# q2 q3 unused, can be use as temp storage register
# q寄存器已经禁用， Without the q-registers, the irq return address will be stored in x3 (gp) and the IRQ bitmask in x4 (tp),
addi x15, x4, 0
picorv32_retirq_insn()
.balign 0x200
irq_regs:
// registers are saved to this memory region during interrupt handling
// the program counter is saved as register 0
.fill 32,4
// stack for the interrupt handler
.fill 128,4
irq_stack:
_prog_start:
li x1, 0
li x2, 0
li x3, 0
li x4, 0
li x5, 0
li x6, 0
li x7, 0
li x8, 0
li x9, 0
li x10,0
li x11,0
li x12,0
li x13,0
li x14,0
li x15,0
li x16,0
li x17,0
li x18,0
li x19,0
li x20,0
li x21,0
li x22,0
li x23,0
li x24,0
li x25,0
li x26,0
li x27,0
li x28,0
li x29,0
li x30,0
li x31,0
li sp, 0x80010000
call main
li gp, 1;
ecall
trap_entry:
addi sp, sp, -136
sw x1, 1* 4(sp)
sw x2, 2* 4(sp)
sw x3, 3* 4(sp)
sw x4, 4* 4(sp)
sw x5, 5* 4(sp)
sw x6, 6* 4(sp)
sw x7, 7* 4(sp)
sw x8, 8* 4(sp)
sw x9, 9* 4(sp)
sw x10, 10*4(sp)
sw x11, 11*4(sp)
sw x12, 12*4(sp)
sw x13, 13*4(sp)
sw x14, 14*4(sp)
sw x15, 15*4(sp)
sw x16, 16*4(sp)
sw x17, 17*4(sp)
sw x18, 18*4(sp)
sw x19, 19*4(sp)
sw x20, 20*4(sp)
sw x21, 21*4(sp)
sw x22, 22*4(sp)
sw x23, 23*4(sp)
sw x24, 24*4(sp)
sw x25, 25*4(sp)
sw x26, 26*4(sp)
sw x27, 27*4(sp)
sw x28, 28*4(sp)
sw x29, 29*4(sp)
sw x30, 30*4(sp)
sw x31, 31*4(sp)
# csrr a0, mcause
# csrr a1, mepc
mv a2, sp
# jal handle_trap
# csrw mepc, a0
# li t0, MSTATUS_MPP
# csrs mstatus, t0
lw x1, 1 *4(sp)
lw x2, 2 *4(sp)
lw x3, 3 *4(sp)
lw x4, 4 *4(sp)
lw x5, 5 *4(sp)
lw x6, 6 *4(sp)
lw x7, 7 *4(sp)
lw x8, 8 *4(sp)
lw x9, 9 *4(sp)
lw x10, 10*4(sp)
lw x11, 11*4(sp)
lw x12, 12*4(sp)
lw x13, 13*4(sp)
lw x14, 14*4(sp)
lw x15, 15*4(sp)
lw x16, 16*4(sp)
lw x17, 17*4(sp)
lw x18, 18*4(sp)
lw x19, 19*4(sp)
lw x20, 20*4(sp)
lw x21, 21*4(sp)
lw x22, 22*4(sp)
lw x23, 23*4(sp)
lw x24, 24*4(sp)
lw x25, 25*4(sp)
lw x26, 26*4(sp)
lw x27, 27*4(sp)
lw x28, 28*4(sp)
lw x29, 29*4(sp)
lw x30, 30*4(sp)
lw x31, 31*4(sp)
addi sp, sp, 136
mret