fix mips stackframe and exception

libcpu/Kconfig

@@ -82,6 +82,10 @@ config ARCH_MIPS
 
 config ARCH_MIPS64
     bool
+	select ARCH_CPU_64BIT
+	
+config ARCH_CPU_64BIT
+		bool
 
 config ARCH_MIPS_XBURST
     bool

libcpu/mips/common/context_gcc.S

 /*
- * Copyright (c) 2006-2019, RT-Thread Development Team
+ * Copyright (c) 2006-2020, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
  * 2019-12-04     Jiaxun Yang  Initial version
+ * 2020-07-26     lizhirui     Fixed some problems
  */
 
 #ifndef __ASSEMBLY__
@@ -56,12 +57,12 @@ rt_hw_context_switch_interrupt:
     bnez    t1, _reswitch
     nop
     li      t1, 0x01                       /* set rt_thread_switch_interrupt_flag to 1 */
-    sw      t1, 0(t0)
+    LONG_S      t1, 0(t0)
     PTR_LA      t0, rt_interrupt_from_thread   /* set rt_interrupt_from_thread */
-    sw      a0, 0(t0)
+    LONG_S      a0, 0(t0)
 _reswitch:
     PTR_LA      t0, rt_interrupt_to_thread     /* set rt_interrupt_to_thread */
-    sw      a1, 0(t0)
+    LONG_S      a1, 0(t0)
     jr      ra
     nop
 
@@ -97,24 +98,24 @@ mips_irq_handle:
     * rt_hw_context_switch_interrupt_do and do not return
     */
     PTR_LA  k0, rt_thread_switch_interrupt_flag
-    lw      k1, 0(k0)
+    LONG_L  k1, 0(k0)
     beqz    k1, spurious_interrupt
     nop
-    sw      zero, 0(k0)                     /* clear flag */
+    LONG_S  zero, 0(k0)                     /* clear flag */
     nop
 
     /*
     * switch to the new thread
     */
     PTR_LA  k0, rt_interrupt_from_thread
-    lw      k1, 0(k0)
+    LONG_L  k1, 0(k0)
     nop
-    sw      sp, 0(k1)                       /* store sp in preempted task TCB */
+    LONG_S  sp, 0(k1)                       /* store sp in preempted task TCB */
 
     PTR_LA  k0, rt_interrupt_to_thread
-    lw      k1, 0(k0)
+    LONG_L  k1, 0(k0)
     nop
-    lw      sp, 0(k1)                       /* get new task stack pointer */
+    LONG_L  sp, 0(k1)                       /* get new task stack pointer */
     j       spurious_interrupt
     nop
 

libcpu/mips/common/exception_gcc.S

 /*
- * Copyright (c) 2006-2019, RT-Thread Development Team
+ * Copyright (c) 2006-2020, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
  * 2019-12-04     Jiaxun Yang  Initial version
+ * 2020-07-26     lizhirui     Add xtlb exception entry
  */
 #ifndef __ASSEMBLY__
 #define __ASSEMBLY__
@@ -26,6 +27,11 @@ tlb_refill_exception:
     b	_general_exception_handler
     nop
 
+    /* 0x080 - XTLB refill handler */
+    .org ebase_start + 0x080
+    b	_general_exception_handler
+    nop
+
     /* 0x100 - Cache error handler */
     .org ebase_start + 0x100
     j	cache_error_handler

libcpu/mips/common/stackframe.h

@@ -206,6 +206,8 @@
     li	v1, ~(ST0_CU1 | ST0_FR | ST0_IM)
     and	v0, v1
     or	v0, a0
+    li  v1, (ST0_KX | ST0_SX | ST0_UX)
+    or  v0, v1
     mtc0	v0, CP0_STATUS
     LONG_L	v1, PT_EPC(sp)
     MTC0	v1, CP0_EPC