建立工程，成功创建两个虚拟串口

2023-06-21 18:00:56 +08:00
commit 3604192d8f
872 changed files with 428764 additions and 0 deletions
--- a/source/rt_thread/libcpu/risc-v/k210/interrupt_gcc.S
+++ b/source/rt_thread/libcpu/risc-v/k210/interrupt_gcc.S
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2018/10/02     Bernard      The first version
+ * 2018/12/27     Jesven       Add SMP schedule
+ */
+
+#include "cpuport.h"
+
+  .section      .text.entry
+  .align 2
+  .global trap_entry
+trap_entry:
+
+    /* save thread context to thread stack */
+    addi sp, sp, -32 * REGBYTES
+
+    STORE x1,   1 * REGBYTES(sp)
+
+    csrr  x1, mstatus
+    STORE x1,   2 * REGBYTES(sp)
+
+    csrr  x1, mepc
+    STORE x1, 0 * REGBYTES(sp)
+
+    STORE x4,   4 * REGBYTES(sp)
+    STORE x5,   5 * REGBYTES(sp)
+    STORE x6,   6 * REGBYTES(sp)
+    STORE x7,   7 * REGBYTES(sp)
+    STORE x8,   8 * REGBYTES(sp)
+    STORE x9,   9 * REGBYTES(sp)
+    STORE x10, 10 * REGBYTES(sp)
+    STORE x11, 11 * REGBYTES(sp)
+    STORE x12, 12 * REGBYTES(sp)
+    STORE x13, 13 * REGBYTES(sp)
+    STORE x14, 14 * REGBYTES(sp)
+    STORE x15, 15 * REGBYTES(sp)
+    STORE x16, 16 * REGBYTES(sp)
+    STORE x17, 17 * REGBYTES(sp)
+    STORE x18, 18 * REGBYTES(sp)
+    STORE x19, 19 * REGBYTES(sp)
+    STORE x20, 20 * REGBYTES(sp)
+    STORE x21, 21 * REGBYTES(sp)
+    STORE x22, 22 * REGBYTES(sp)
+    STORE x23, 23 * REGBYTES(sp)
+    STORE x24, 24 * REGBYTES(sp)
+    STORE x25, 25 * REGBYTES(sp)
+    STORE x26, 26 * REGBYTES(sp)
+    STORE x27, 27 * REGBYTES(sp)
+    STORE x28, 28 * REGBYTES(sp)
+    STORE x29, 29 * REGBYTES(sp)
+    STORE x30, 30 * REGBYTES(sp)
+    STORE x31, 31 * REGBYTES(sp)
+
+    /* switch to interrupt stack */
+    move  s0, sp
+
+    /* get cpu id */
+    csrr  t0, mhartid
+
+    /* switch interrupt stack of current cpu */
+    la    sp, __stack_start__
+    addi  t1, t0, 1
+    li    t2, __STACKSIZE__
+    mul   t1, t1, t2
+    add   sp, sp, t1 /* sp = (cpuid + 1) * __STACKSIZE__ + __stack_start__ */
+
+    /* handle interrupt */
+    call  rt_interrupt_enter
+    csrr  a0, mcause
+    csrr  a1, mepc
+    mv    a2, s0
+    call  handle_trap
+    call  rt_interrupt_leave
+
+#ifdef RT_USING_SMP
+    /* s0 --> sp */
+    mv  sp, s0
+    mv  a0, s0
+    call rt_scheduler_do_irq_switch
+    j   rt_hw_context_switch_exit
+
+#else
+
+    /* switch to from_thread stack */
+    move  sp, s0
+
+    /* need to switch new thread */
+    la    s0, rt_thread_switch_interrupt_flag
+    lw    s2, 0(s0)
+    beqz  s2, spurious_interrupt
+    sw    zero, 0(s0)
+
+    la    s0, rt_interrupt_from_thread
+    LOAD  s1, 0(s0)
+    STORE sp, 0(s1)
+
+    la    s0, rt_interrupt_to_thread
+    LOAD  s1, 0(s0)
+    LOAD  sp, 0(s1)
+
+#endif
+
+spurious_interrupt:
+    j rt_hw_context_switch_exit