[PATCH] sim: dv-core: add hw_detach_address method [PR sim/25211]

[PATCH] sim: dv-core: add hw_detach_address method [PR sim/25211]

[Mike Frysinger]

The core device has an attach address method as the root of the tree
which calls out to the sim API.  But it doesn't have a corresponding
detach method which means we just crash if anything tries to detach
itself from the core.  In practice, the m68hc11 is the only model
that actually tries to detach itself on the fly, so no one noticed
earlier.

With this in place, we can delete the existing detach code from the
m68hc11 model since it defaults to "passthru" callback which will in
turn call the dv-core detach, and they have the same behavior -- call
the sim core API to detach from the address space.

Bug: https://sourceware.org/PR25211
---
 sim/common/dv-core.c     | 18 ++++++++++++++++++
 sim/m68hc11/dv-m68hc11.c | 13 -------------
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/sim/common/dv-core.c b/sim/common/dv-core.c
index 4a5f5a0eb579..4cff41bea8ef 100644
--- a/sim/common/dv-core.c
+++ b/sim/common/dv-core.c
@@ -72,6 +72,23 @@ dv_core_attach_address_callback (struct hw *me,
 }
 
 
+static void
+dv_core_detach_address_callback (struct hw *me,
+				 int level,
+				 int space,
+				 address_word addr,
+				 address_word nr_bytes,
+				 struct hw *client)
+{
+  HW_TRACE ((me, "detach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s",
+	     level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client)));
+  /* NOTE: At preset the space is assumed to be zero.  Perhaphs the
+     space should be mapped onto something for instance: space0 -
+     unified memory; space1 - IO memory; ... */
+  sim_core_detach (hw_system (me), NULL, /*cpu*/ level, space, addr);
+}
+
+
 static unsigned
 dv_core_dma_read_buffer_callback (struct hw *me,
 				  void *dest,
@@ -109,6 +126,7 @@ static void
 dv_core_finish (struct hw *me)
 {
   set_hw_attach_address (me, dv_core_attach_address_callback);
+  set_hw_detach_address (me, dv_core_detach_address_callback);
   set_hw_dma_write_buffer (me, dv_core_dma_write_buffer_callback);
   set_hw_dma_read_buffer (me, dv_core_dma_read_buffer_callback);
 }
diff --git a/sim/m68hc11/dv-m68hc11.c b/sim/m68hc11/dv-m68hc11.c
index cdcc9f8eb918..f255f100d706 100644
--- a/sim/m68hc11/dv-m68hc11.c
+++ b/sim/m68hc11/dv-m68hc11.c
@@ -253,18 +253,6 @@ dv_m6811_attach_address_callback (struct hw *me,
     }
 }
 
-static void
-dv_m6811_detach_address_callback (struct hw *me,
-                                  int level,
-                                  int space,
-                                  address_word addr,
-                                  address_word nr_bytes,
-                                  struct hw *client)
-{
-  sim_core_detach (hw_system (me), NULL, /*cpu*/
-                   level, space, addr);
-}
-
 static void
 m68hc11_delete (struct hw* me)
 {
@@ -387,7 +375,6 @@ m68hc11cpu_finish (struct hw *me)
   set_hw_ports (me, m68hc11cpu_ports);
   set_hw_port_event (me, m68hc11cpu_port_event);
   set_hw_attach_address (me, dv_m6811_attach_address_callback);
-  set_hw_detach_address (me, dv_m6811_detach_address_callback);
 #ifdef set_hw_ioctl
   set_hw_ioctl (me, m68hc11_ioctl);
 #else
-- 
2.38.1