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[/] [or1k/] [branches/] [oc/] [gdb-5.0/] [sim/] [common/] [hw-base.c] - Rev 1771
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/* This file is part of the program psim. Copyright (C) 1994-1996, 1998, 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 "hw-main.h" #include "hw-base.h" #ifdef HAVE_STRING_H #include <string.h> #else #ifdef HAVE_STRINGS_H #include <strings.h> #endif #endif #if HAVE_STDLIB_H #include <stdlib.h> #endif #include <ctype.h> #include "hw-config.h" struct hw_base_data { int finished_p; const struct hw_descriptor *descriptor; hw_delete_callback *to_delete; }; static int generic_hw_unit_decode (struct hw *bus, const char *unit, hw_unit *phys) { memset (phys, 0, sizeof (*phys)); if (unit == NULL) return 0; else { int nr_cells = 0; const int max_nr_cells = hw_unit_nr_address_cells (bus); while (1) { char *end = NULL; unsigned long val; val = strtoul (unit, &end, 0); /* parse error? */ if (unit == end) return -1; /* two many cells? */ if (nr_cells >= max_nr_cells) return -1; /* save it */ phys->cells[nr_cells] = val; nr_cells++; unit = end; /* more to follow? */ if (isspace (*unit) || *unit == '\0') break; if (*unit != ',') return -1; unit++; } if (nr_cells < max_nr_cells) { /* shift everything to correct position */ int i; for (i = 1; i <= nr_cells; i++) phys->cells[max_nr_cells - i] = phys->cells[nr_cells - i]; for (i = 0; i < (max_nr_cells - nr_cells); i++) phys->cells[i] = 0; } phys->nr_cells = max_nr_cells; return max_nr_cells; } } static int generic_hw_unit_encode (struct hw *bus, const hw_unit *phys, char *buf, int sizeof_buf) { int i; int len; char *pos = buf; /* skip leading zero's */ for (i = 0; i < phys->nr_cells; i++) { if (phys->cells[i] != 0) break; } /* don't output anything if empty */ if (phys->nr_cells == 0) { strcpy(pos, ""); len = 0; } else if (i == phys->nr_cells) { /* all zero */ strcpy(pos, "0"); len = 1; } else { for (; i < phys->nr_cells; i++) { if (pos != buf) { strcat(pos, ","); pos = strchr(pos, '\0'); } if (phys->cells[i] < 10) sprintf (pos, "%ld", (unsigned long)phys->cells[i]); else sprintf (pos, "0x%lx", (unsigned long)phys->cells[i]); pos = strchr(pos, '\0'); } len = pos - buf; } if (len >= sizeof_buf) hw_abort (NULL, "generic_unit_encode - buffer overflow\n"); return len; } static int generic_hw_unit_address_to_attach_address (struct hw *me, const hw_unit *address, int *attach_space, unsigned_word *attach_address, struct hw *client) { int i; for (i = 0; i < address->nr_cells - 2; i++) { if (address->cells[i] != 0) hw_abort (me, "Only 32bit addresses supported"); } if (address->nr_cells >= 2) *attach_space = address->cells[address->nr_cells - 2]; else *attach_space = 0; *attach_address = address->cells[address->nr_cells - 1]; return 1; } static int generic_hw_unit_size_to_attach_size (struct hw *me, const hw_unit *size, unsigned *nr_bytes, struct hw *client) { int i; for (i = 0; i < size->nr_cells - 1; i++) { if (size->cells[i] != 0) hw_abort (me, "Only 32bit sizes supported"); } *nr_bytes = size->cells[0]; return *nr_bytes; } /* ignore/passthrough versions of each function */ static void passthrough_hw_attach_address (struct hw *me, int level, int space, address_word addr, address_word nr_bytes, struct hw *client) /*callback/default*/ { if (hw_parent (me) == NULL) hw_abort (client, "hw_attach_address: no parent attach method"); hw_attach_address (hw_parent (me), level, space, addr, nr_bytes, client); } static void passthrough_hw_detach_address (struct hw *me, int level, int space, address_word addr, address_word nr_bytes, struct hw *client) /*callback/default*/ { if (hw_parent (me) == NULL) hw_abort (client, "hw_attach_address: no parent attach method"); hw_detach_address (hw_parent (me), level, space, addr, nr_bytes, client); } static unsigned panic_hw_io_read_buffer (struct hw *me, void *dest, int space, unsigned_word addr, unsigned nr_bytes) { hw_abort (me, "no io-read method"); return 0; } static unsigned panic_hw_io_write_buffer (struct hw *me, const void *source, int space, unsigned_word addr, unsigned nr_bytes) { hw_abort (me, "no io-write method"); return 0; } static unsigned passthrough_hw_dma_read_buffer (struct hw *me, void *dest, int space, unsigned_word addr, unsigned nr_bytes) { if (hw_parent (me) == NULL) hw_abort (me, "no parent dma-read method"); return hw_dma_read_buffer (hw_parent (me), dest, space, addr, nr_bytes); } static unsigned passthrough_hw_dma_write_buffer (struct hw *me, const void *source, int space, unsigned_word addr, unsigned nr_bytes, int violate_read_only_section) { if (hw_parent (me) == NULL) hw_abort (me, "no parent dma-write method"); return hw_dma_write_buffer (hw_parent (me), source, space, addr, nr_bytes, violate_read_only_section); } static void ignore_hw_delete (struct hw *me) { /* NOP */ } static const char * full_name_of_hw (struct hw *leaf, char *buf, unsigned sizeof_buf) { /* get a buffer */ char full_name[1024]; if (buf == (char*)0) { buf = full_name; sizeof_buf = sizeof (full_name); } /* use head recursion to construct the path */ if (hw_parent (leaf) == NULL) /* root */ { if (sizeof_buf < 1) hw_abort (leaf, "buffer overflow"); *buf = '\0'; } else /* sub node */ { char unit[1024]; full_name_of_hw (hw_parent (leaf), buf, sizeof_buf); if (hw_unit_encode (hw_parent (leaf), hw_unit_address (leaf), unit + 1, sizeof (unit) - 1) > 0) unit[0] = '@'; else unit[0] = '\0'; if (strlen (buf) + strlen ("/") + strlen (hw_name (leaf)) + strlen (unit) >= sizeof_buf) hw_abort (leaf, "buffer overflow"); strcat (buf, "/"); strcat (buf, hw_name (leaf)); strcat (buf, unit); } /* return it usefully */ if (buf == full_name) buf = hw_strdup (leaf, full_name); return buf; } struct hw * hw_create (struct sim_state *sd, struct hw *parent, const char *family, const char *name, const char *unit, const char *args) { /* NOTE: HW must be allocated using ZALLOC, others use HW_ZALLOC */ struct hw *hw = ZALLOC (struct hw); /* our identity */ hw->family_of_hw = hw_strdup (hw, family); hw->name_of_hw = hw_strdup (hw, name); hw->args_of_hw = hw_strdup (hw, args); /* a hook into the system */ if (sd != NULL) hw->system_of_hw = sd; else if (parent != NULL) hw->system_of_hw = hw_system (parent); else hw_abort (parent, "No system found"); /* in a tree */ if (parent != NULL) { struct hw **sibling = &parent->child_of_hw; while ((*sibling) != NULL) sibling = &(*sibling)->sibling_of_hw; *sibling = hw; hw->parent_of_hw = parent; } /* top of tree */ if (parent != NULL) { struct hw *root = parent; while (root->parent_of_hw != NULL) root = root->parent_of_hw; hw->root_of_hw = root; } /* a unique identifier for the device on the parents bus */ if (parent != NULL) { hw_unit_decode (parent, unit, &hw->unit_address_of_hw); } /* Determine our path */ if (parent != NULL) hw->path_of_hw = full_name_of_hw (hw, NULL, 0); else hw->path_of_hw = "/"; /* create our base type */ hw->base_of_hw = HW_ZALLOC (hw, struct hw_base_data); hw->base_of_hw->finished_p = 0; /* our callbacks */ set_hw_io_read_buffer (hw, panic_hw_io_read_buffer); set_hw_io_write_buffer (hw, panic_hw_io_write_buffer); set_hw_dma_read_buffer (hw, passthrough_hw_dma_read_buffer); set_hw_dma_write_buffer (hw, passthrough_hw_dma_write_buffer); set_hw_unit_decode (hw, generic_hw_unit_decode); set_hw_unit_encode (hw, generic_hw_unit_encode); set_hw_unit_address_to_attach_address (hw, generic_hw_unit_address_to_attach_address); set_hw_unit_size_to_attach_size (hw, generic_hw_unit_size_to_attach_size); set_hw_attach_address (hw, passthrough_hw_attach_address); set_hw_detach_address (hw, passthrough_hw_detach_address); set_hw_delete (hw, ignore_hw_delete); /* locate a descriptor */ { const struct hw_descriptor **table; for (table = hw_descriptors; *table != NULL; table++) { const struct hw_descriptor *entry; for (entry = *table; entry->family != NULL; entry++) { if (strcmp (family, entry->family) == 0) { hw->base_of_hw->descriptor = entry; break; } } } if (hw->base_of_hw->descriptor == NULL) { hw_abort (parent, "Unknown device `%s'", family); } } /* Attach dummy ports */ create_hw_alloc_data (hw); create_hw_property_data (hw); create_hw_port_data (hw); create_hw_event_data (hw); create_hw_handle_data (hw); create_hw_instance_data (hw); return hw; } int hw_finished_p (struct hw *me) { return (me->base_of_hw->finished_p); } void hw_finish (struct hw *me) { if (hw_finished_p (me)) hw_abort (me, "Attempt to finish finished device"); /* Fill in the (hopefully) defined address/size cells values */ if (hw_find_property (me, "#address-cells") != NULL) me->nr_address_cells_of_hw_unit = hw_find_integer_property (me, "#address-cells"); else me->nr_address_cells_of_hw_unit = 2; if (hw_find_property (me, "#size-cells") != NULL) me->nr_size_cells_of_hw_unit = hw_find_integer_property (me, "#size-cells"); else me->nr_size_cells_of_hw_unit = 1; /* Fill in the (hopefully) defined trace variable */ if (hw_find_property (me, "trace?") != NULL) me->trace_of_hw_p = hw_find_boolean_property (me, "trace?"); /* allow global variable to define default tracing */ else if (! hw_trace_p (me) && hw_find_property (hw_root (me), "global-trace?") != NULL && hw_find_boolean_property (hw_root (me), "global-trace?")) me->trace_of_hw_p = 1; /* Allow the real device to override any methods */ me->base_of_hw->descriptor->to_finish (me); me->base_of_hw->finished_p = 1; } void hw_delete (struct hw *me) { /* give the object a chance to tidy up */ me->base_of_hw->to_delete (me); delete_hw_instance_data (me); delete_hw_handle_data (me); delete_hw_event_data (me); delete_hw_port_data (me); delete_hw_property_data (me); /* now unlink us from the tree */ if (hw_parent (me)) { struct hw **sibling = &hw_parent (me)->child_of_hw; while (*sibling != NULL) { if (*sibling == me) { *sibling = me->sibling_of_hw; me->sibling_of_hw = NULL; me->parent_of_hw = NULL; break; } } } /* some sanity checks */ if (hw_child (me) != NULL) { hw_abort (me, "attempt to delete device with children"); } if (hw_sibling (me) != NULL) { hw_abort (me, "attempt to delete device with siblings"); } /* blow away all memory belonging to the device */ delete_hw_alloc_data (me); /* finally */ zfree (me->base_of_hw); zfree (me); } /* Go through the devices various reg properties for those that specify attach addresses */ void do_hw_attach_regs (struct hw *hw) { static const char *(reg_property_names[]) = { "attach-addresses", "assigned-addresses", "reg", "alternate-reg" , NULL }; const char **reg_property_name; int nr_valid_reg_properties = 0; for (reg_property_name = reg_property_names; *reg_property_name != NULL; reg_property_name++) { if (hw_find_property (hw, *reg_property_name) != NULL) { reg_property_spec reg; int reg_entry; for (reg_entry = 0; hw_find_reg_array_property (hw, *reg_property_name, reg_entry, ®); reg_entry++) { unsigned_word attach_address; int attach_space; unsigned attach_size; if (!hw_unit_address_to_attach_address (hw_parent (hw), ®.address, &attach_space, &attach_address, hw)) continue; if (!hw_unit_size_to_attach_size (hw_parent (hw), ®.size, &attach_size, hw)) continue; hw_attach_address (hw_parent (hw), 0, attach_space, attach_address, attach_size, hw); nr_valid_reg_properties++; } /* if first option matches don't try for any others */ if (reg_property_name == reg_property_names) break; } } }
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