PR 1993 - Convert MIPS to PIC IRQ model

2012-04-04 08:39:46 -05:00
parent eb6362dccb
commit 0c0181dee2
80 changed files with 2909 additions and 817 deletions
--- a/c/src/lib/libbsp/mips/shared/irq/vectorexceptions.c
+++ b/c/src/lib/libbsp/mips/shared/irq/vectorexceptions.c
@@ -0,0 +1,118 @@
+/**
+ *  @file
+ *  
+ *  Common Code for Vectoring MIPS Exceptions
+ *
+ *  The actual decoding of the cause register and vector number assignment
+ *  is CPU model specific.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2012.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ * 
+ *  $Id$
+ */
+
+#include <rtems.h>
+#include <stdlib.h>
+#include <string.h>
+#include <rtems/mips/iregdef.h>
+#include <rtems/mips/idtcpu.h>
+#include <rtems/bspIo.h>
+#include <bsp/irq-generic.h>
+
+void mips_vector_exceptions( CPU_Interrupt_frame *frame );
+
+static const char *cause_strings[32] =
+{
+  /*  0 */ "Int",
+  /*  1 */ "TLB Mods",
+  /*  2 */ "TLB Load",
+  /*  3 */ "TLB Store",
+  /*  4 */ "Address Load",
+  /*  5 */ "Address Store",
+  /*  6 */ "Instruction Bus Error",
+  /*  7 */ "Data Bus Error",
+  /*  8 */ "Syscall",
+  /*  9 */ "Breakpoint",
+  /* 10 */ "Reserved Instruction",
+  /* 11 */ "Coprocessor Unuseable",
+  /* 12 */ "Overflow",
+  /* 13 */ "Trap",
+  /* 14 */ "Instruction Virtual Coherency Error",
+  /* 15 */ "FP Exception",
+  /* 16 */ "Reserved 16",
+  /* 17 */ "Reserved 17",
+  /* 18 */ "Reserved 18",
+  /* 19 */ "Reserved 19",
+  /* 20 */ "Reserved 20",
+  /* 21 */ "Reserved 21",
+  /* 22 */ "Reserved 22",
+  /* 23 */ "Watch",
+  /* 24 */ "Reserved 24",
+  /* 25 */ "Reserved 25",
+  /* 26 */ "Reserved 26",
+  /* 27 */ "Reserved 27",
+  /* 28 */ "Reserved 28",
+  /* 29 */ "Reserved 29",
+  /* 30 */ "Reserved 30",
+  /* 31 */ "Data Virtual Coherency Error"
+};
+
+struct regdef
+{
+  int  offset;
+  char *name;
+};
+
+static const struct regdef dumpregs[]= {
+  { R_RA, "R_RA" }, { R_V0, "R_V0" },     { R_V1, "R_V1" },
+  { R_A0, "R_A0" }, { R_A1, "R_A1" },     { R_A2, "R_A2" },
+  { R_A3, "R_A3" }, { R_T0, "R_T0" },     { R_T1, "R_T1" },
+  { R_T2, "R_T2" }, { R_T3, "R_T3" },     { R_T4, "R_T4" },
+  { R_T5, "R_T5" }, { R_T6, "R_T6" },     { R_T7, "R_T7" },
+  { R_T8, "R_T8" }, { R_MDLO, "R_MDLO" }, { R_MDHI, "R_MDHI" },
+  { R_GP, "R_GP" }, { R_FP, "R_FP" },     { R_AT, "R_AT" },
+  { R_EPC,"R_EPC"}, { -1, NULL }
+};
+
+static void mips_dump_exception_frame( CPU_Interrupt_frame *frame )
+{
+  uint32_t *frame_u32;
+  int   i, j;
+
+  frame_u32 = (uint32_t *)frame;
+  for(i=0; dumpregs[i].offset > -1; i++)
+  {
+     printk("   %s", dumpregs[i].name);
+     for(j=0; j< 7-strlen(dumpregs[i].name); j++) printk(" ");
+#if (__mips == 1 ) || (__mips == 32)
+     printk("  %08X%c", frame_u32[dumpregs[i].offset], (i%3) ? '\t' : '\n' );
+#elif __mips == 3
+     printk("  %08X", frame_u32[2 * dumpregs[i].offset + 1] );
+     printk("%08X%c", frame_u32[2 * dumpregs[i].offset], (i%2) ? '\t' : '\n' );
+#endif
+  }
+  printk( "\n" );
+}
+
+/*
+ *  There are constants defined for these but they should basically
+ *  all be close to the same set.
+ */
+
+void mips_vector_exceptions( CPU_Interrupt_frame *frame )
+{
+  uint32_t   cause;
+  uint32_t   exc;
+
+  mips_get_cause( cause );
+  exc = (cause >> 2) & 0x1f;
+
+  bsp_interrupt_handler_dispatch( exc );
+}