From 597d71cc032bf30098c2a5f890eec48ce5ff418d Mon Sep 17 00:00:00 2001
From: Bernard Xiong <bernard.xiong@gmail.com>
Date: Sun, 23 Dec 2018 14:11:25 +0800
Subject: [bsp][k210] Add get_free_heap_size function.

* Add get_free_heap_size function;
* Increase shell stack for KPU module.
---
 libcpu/risc-v/k210/interrupt.c   | 14 +++++++++++++-
 libcpu/risc-v/k210/startup_gcc.S |  5 +++++
 2 files changed, 18 insertions(+), 1 deletion(-)

(limited to 'libcpu')

diff --git a/libcpu/risc-v/k210/interrupt.c b/libcpu/risc-v/k210/interrupt.c
index 6d8866c3f0..f9c3eb5a67 100644
--- a/libcpu/risc-v/k210/interrupt.c
+++ b/libcpu/risc-v/k210/interrupt.c
@@ -114,6 +114,13 @@ rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
     return old_handler;
 }
 
+RT_WEAK
+void plic_irq_handle(plic_irq_t irq)
+{
+    rt_kprintf("UN-handled interrupt %d occurred!!!\n", irq);
+    return ;
+}
+
 uintptr_t handle_irq_m_ext(uintptr_t cause, uintptr_t epc)
 {
     /*
@@ -142,7 +149,12 @@ uintptr_t handle_irq_m_ext(uintptr_t cause, uintptr_t epc)
         /* Disable software interrupt and timer interrupt */
         clear_csr(mie, MIP_MTIP | MIP_MSIP);
 
-        if (irq_desc[core_id][int_num].handler)
+        if (irq_desc[core_id][int_num].handler == (rt_isr_handler_t)rt_hw_interrupt_handle)
+        {
+            /* default handler, route to kendryte bsp plic driver */
+            plic_irq_handle(int_num);
+        }
+        else if (irq_desc[core_id][int_num].handler)
         {
             irq_desc[core_id][int_num].handler(int_num, irq_desc[core_id][int_num].param);
         }
diff --git a/libcpu/risc-v/k210/startup_gcc.S b/libcpu/risc-v/k210/startup_gcc.S
index bc73f51e03..2e69c5021e 100644
--- a/libcpu/risc-v/k210/startup_gcc.S
+++ b/libcpu/risc-v/k210/startup_gcc.S
@@ -16,6 +16,11 @@
 _start:
   j 1f
   .word 0xdeadbeef
+  .align 3
+  .global g_wake_up
+  g_wake_up:
+      .dword 1
+      .dword 0
 1:
   csrw mideleg, 0
   csrw medeleg, 0
-- 
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