09d236daec
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
137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/* The common simulator framework for GDB, the GNU Debugger.
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Copyright 2002-2022 Free Software Foundation, Inc.
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Contributed by Andrew Cagney and Red Hat.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This must come before any other includes. */
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#include "defs.h"
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#include "sim-main.h"
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#include "hw-main.h"
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/* DEVICE
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core - root of the device tree
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DESCRIPTION
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The core device, positioned at the root of the device tree appears
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to its child devices as a normal device just like every other
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device in the tree.
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Internally it is implemented using a core object. Requests to
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attach (or detach) address spaces are passed to that core object.
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Requests to transfer (DMA) data are reflected back down the device
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tree using the core_map data transfer methods.
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PROPERTIES
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None.
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*/
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static void
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dv_core_attach_address_callback (struct hw *me,
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int level,
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int space,
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address_word addr,
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address_word nr_bytes,
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struct hw *client)
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{
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HW_TRACE ((me, "attach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s",
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level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client)));
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/* NOTE: At preset the space is assumed to be zero. Perhaphs the
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space should be mapped onto something for instance: space0 -
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unified memory; space1 - IO memory; ... */
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sim_core_attach (hw_system (me),
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NULL, /*cpu*/
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level,
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access_read_write_exec,
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space, addr,
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nr_bytes,
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0, /* modulo */
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client,
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NULL);
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}
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static void
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dv_core_detach_address_callback (struct hw *me,
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int level,
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int space,
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address_word addr,
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address_word nr_bytes,
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struct hw *client)
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{
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HW_TRACE ((me, "detach - level=%d, space=%d, addr=0x%lx, nr_bytes=%ld, client=%s",
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level, space, (unsigned long) addr, (unsigned long) nr_bytes, hw_path (client)));
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/* NOTE: At preset the space is assumed to be zero. Perhaphs the
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space should be mapped onto something for instance: space0 -
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unified memory; space1 - IO memory; ... */
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sim_core_detach (hw_system (me), NULL, /*cpu*/ level, space, addr);
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}
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static unsigned
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dv_core_dma_read_buffer_callback (struct hw *me,
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void *dest,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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return sim_core_read_buffer (hw_system (me),
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NULL, /*CPU*/
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space, /*???*/
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dest,
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addr,
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nr_bytes);
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}
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static unsigned
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dv_core_dma_write_buffer_callback (struct hw *me,
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const void *source,
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int space,
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unsigned_word addr,
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unsigned nr_bytes,
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int violate_read_only_section)
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{
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return sim_core_write_buffer (hw_system (me),
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NULL, /*cpu*/
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space, /*???*/
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source,
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addr,
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nr_bytes);
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}
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static void
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dv_core_finish (struct hw *me)
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{
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set_hw_attach_address (me, dv_core_attach_address_callback);
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set_hw_detach_address (me, dv_core_detach_address_callback);
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set_hw_dma_write_buffer (me, dv_core_dma_write_buffer_callback);
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set_hw_dma_read_buffer (me, dv_core_dma_read_buffer_callback);
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}
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const struct hw_descriptor dv_core_descriptor[] = {
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{ "core", dv_core_finish, },
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{ NULL, NULL },
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};
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