jit: make gdb_symtab::blocks an std::forward_list

[deliverable/binutils-gdb.git] / sim / bfin / dv-bfin_ppi.c

diff --git a/sim/bfin/dv-bfin_ppi.c b/sim/bfin/dv-bfin_ppi.c
index e2f829246c3213f1c04745af538fe220b9f0973e..990e32d924e412c77caf56ce3245147b84bce85a 100644 (file)
--- a/sim/bfin/dv-bfin_ppi.c
+++ b/sim/bfin/dv-bfin_ppi.c
@@ -1,7 +1,7 @@
 /* Blackfin Parallel Port Interface (PPI) model
    For "old style" PPIs on BF53x/etc... parts.
 
-   Copyright (C) 2010-2011 Free Software Foundation, Inc.
+   Copyright (C) 2010-2019 Free Software Foundation, Inc.
    Contributed by Analog Devices, Inc.
 
    This file is part of simulators.
@@ -85,14 +85,16 @@ bfin_ppi_io_write_buffer (struct hw *me, const void *source, int space,
   bu32 value;
   bu16 *valuep;
 
+  /* Invalid access mode is higher priority than missing register.  */
+  if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, true))
+    return 0;
+
   value = dv_load_2 (source);
   mmr_off = addr - ppi->base;
   valuep = (void *)((unsigned long)ppi + mmr_base() + mmr_off);
 
   HW_TRACE_WRITE ();
 
-  dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
-
   switch (mmr_off)
     {
     case mmr_offset(control):
@@ -109,7 +111,7 @@ bfin_ppi_io_write_buffer (struct hw *me, const void *source, int space,
       break;
     default:
       dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
-      break;
+      return 0;
     }
 
   return nr_bytes;
@@ -123,13 +125,15 @@ bfin_ppi_io_read_buffer (struct hw *me, void *dest, int space,
   bu32 mmr_off;
   bu16 *valuep;
 
+  /* Invalid access mode is higher priority than missing register.  */
+  if (!dv_bfin_mmr_require_16 (me, addr, nr_bytes, false))
+    return 0;
+
   mmr_off = addr - ppi->base;
   valuep = (void *)((unsigned long)ppi + mmr_base() + mmr_off);
 
   HW_TRACE_READ ();
 
-  dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
-
   switch (mmr_off)
     {
     case mmr_offset(control):
@@ -141,7 +145,7 @@ bfin_ppi_io_read_buffer (struct hw *me, void *dest, int space,
       break;
     default:
       dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
-      break;
+      return 0;
     }
 
   return nr_bytes;