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/* This file is part of the program psim. Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "sim-main.h" #include "hw-main.h" /* DEVICE core - root of the device tree DESCRIPTION The core device, positioned at the root of the device tree appears to its child devices as a normal device just like every other device in the tree. Internally it is implemented using a core object. Requests to attach (or detach) address spaces are passed to that core object. Requests to transfer (DMA) data are reflected back down the device tree using the core_map data transfer methods. PROPERTIES None. */ static void dv_core_attach_address_callback (struct hw *me, int level, int space, address_word addr, address_word nr_bytes, struct hw *client) { HW_TRACE ((me, "attach - 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; ... */ if (space != 0) hw_abort (me, "Hey! Unknown space %d", space); sim_core_attach (hw_system (me), NULL, /*cpu*/ level, access_read_write_exec, space, addr, nr_bytes, 0, /* modulo */ client, NULL); } static unsigned dv_core_dma_read_buffer_callback (struct hw *me, void *dest, int space, unsigned_word addr, unsigned nr_bytes) { return sim_core_read_buffer (hw_system (me), NULL, /*CPU*/ space, /*???*/ dest, addr, nr_bytes); } static unsigned dv_core_dma_write_buffer_callback (struct hw *me, const void *source, int space, unsigned_word addr, unsigned nr_bytes, int violate_read_only_section) { return sim_core_write_buffer (hw_system (me), NULL, /*cpu*/ space, /*???*/ source, addr, nr_bytes); } static void dv_core_finish (struct hw *me) { set_hw_attach_address (me, dv_core_attach_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); } const struct hw_descriptor dv_core_descriptor[] = { { "core", dv_core_finish, }, { NULL }, };
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