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-rw-r--r--sim/ppc/corefile.c415
1 files changed, 415 insertions, 0 deletions
diff --git a/sim/ppc/corefile.c b/sim/ppc/corefile.c
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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.
+
+ */
+
+
+#ifndef _CORE_C_
+#define _CORE_C_
+
+#include "basics.h"
+#include "device_table.h"
+#include "corefile.h"
+
+typedef struct _core_mapping core_mapping;
+struct _core_mapping {
+ /* common */
+ int level;
+ int space;
+ unsigned_word base;
+ unsigned_word bound;
+ unsigned nr_bytes;
+ /* memory map */
+ void *free_buffer;
+ void *buffer;
+ /* callback map */
+ device *device;
+ /* growth */
+ core_mapping *next;
+};
+
+struct _core_map {
+ core_mapping *first;
+};
+
+typedef enum {
+ core_read_map,
+ core_write_map,
+ core_execute_map,
+ nr_core_map_types,
+} core_map_types;
+
+struct _core {
+ core_map map[nr_core_map_types];
+};
+
+
+INLINE_CORE\
+(core *)
+core_create(void)
+{
+ return ZALLOC(core);
+}
+
+
+INLINE_CORE\
+(core *)
+core_from_device(device *root)
+{
+ root = device_root(root);
+ ASSERT(strcmp(device_name(root), "core") == 0);
+ return device_data(root);
+}
+
+
+INLINE_CORE\
+(void)
+core_init(core *memory)
+{
+ core_map_types access_type;
+ for (access_type = 0;
+ access_type < nr_core_map_types;
+ access_type++) {
+ core_map *map = memory->map + access_type;
+ /* blow away old mappings */
+ core_mapping *curr = map->first;
+ while (curr != NULL) {
+ core_mapping *tbd = curr;
+ curr = curr->next;
+ if (tbd->free_buffer != NULL) {
+ ASSERT(tbd->buffer != NULL);
+ zfree(tbd->free_buffer);
+ }
+ zfree(tbd);
+ }
+ map->first = NULL;
+ }
+}
+
+
+
+/* the core has three sub mappings that the more efficient
+ read/write fixed quantity functions use */
+
+INLINE_CORE\
+(core_map *)
+core_readable(core *memory)
+{
+ return memory->map + core_read_map;
+}
+
+INLINE_CORE\
+(core_map *)
+core_writeable(core *memory)
+{
+ return memory->map + core_write_map;
+}
+
+INLINE_CORE\
+(core_map *)
+core_executable(core *memory)
+{
+ return memory->map + core_execute_map;
+}
+
+
+
+STATIC_INLINE_CORE\
+(core_mapping *)
+new_core_mapping(attach_type attach,
+ int space,
+ unsigned_word addr,
+ unsigned nr_bytes,
+ device *device,
+ void *buffer,
+ void *free_buffer)
+{
+ core_mapping *new_mapping = ZALLOC(core_mapping);
+ /* common */
+ new_mapping->level = attach;
+ new_mapping->space = space;
+ new_mapping->base = addr;
+ new_mapping->nr_bytes = nr_bytes;
+ new_mapping->bound = addr + (nr_bytes - 1);
+ if (attach == attach_raw_memory) {
+ new_mapping->buffer = buffer;
+ new_mapping->free_buffer = free_buffer;
+ }
+ else if (attach >= attach_callback) {
+ new_mapping->device = device;
+ }
+ else {
+ error("new_core_mapping() - internal error - unknown attach type %d\n",
+ attach);
+ }
+ return new_mapping;
+}
+
+
+STATIC_INLINE_CORE\
+(void)
+core_map_attach(core_map *access_map,
+ attach_type attach,
+ int space,
+ unsigned_word addr,
+ unsigned nr_bytes, /* host limited */
+ device *client, /*callback/default*/
+ void *buffer, /*raw_memory*/
+ void *free_buffer) /*raw_memory*/
+{
+ /* find the insertion point for this additional mapping and insert */
+ core_mapping *next_mapping;
+ core_mapping **last_mapping;
+
+ /* actually do occasionally get a zero size map */
+ if (nr_bytes == 0) {
+ device_error(client, "called on core_map_attach() with size zero");
+ }
+
+ /* find the insertion point (between last/next) */
+ next_mapping = access_map->first;
+ last_mapping = &access_map->first;
+ while(next_mapping != NULL
+ && (next_mapping->level < attach
+ || (next_mapping->level == attach
+ && next_mapping->bound < addr))) {
+ /* provided levels are the same */
+ /* assert: next_mapping->base > all bases before next_mapping */
+ /* assert: next_mapping->bound >= all bounds before next_mapping */
+ last_mapping = &next_mapping->next;
+ next_mapping = next_mapping->next;
+ }
+
+ /* check insertion point correct */
+ ASSERT(next_mapping == NULL || next_mapping->level >= attach);
+ if (next_mapping != NULL && next_mapping->level == attach
+ && next_mapping->base < (addr + (nr_bytes - 1))) {
+ device_error(client, "map overlap when attaching %d:0x%lx (%ld)",
+ space, (long)addr, (long)nr_bytes);
+ }
+
+ /* create/insert the new mapping */
+ *last_mapping = new_core_mapping(attach,
+ space, addr, nr_bytes,
+ client, buffer, free_buffer);
+ (*last_mapping)->next = next_mapping;
+}
+
+
+INLINE_CORE\
+(void)
+core_attach(core *memory,
+ attach_type attach,
+ int space,
+ access_type access,
+ unsigned_word addr,
+ unsigned nr_bytes, /* host limited */
+ device *client) /*callback/default*/
+{
+ core_map_types access_map;
+ void *buffer;
+ void *free_buffer;
+ if (attach == attach_raw_memory) {
+ /* Padd out the raw buffer to ensure that ADDR starts on a
+ correctly aligned boundary */
+ int padding = (addr % sizeof (unsigned64));
+ free_buffer = zalloc(nr_bytes + padding);
+ buffer = (char*)free_buffer + padding;
+ }
+ else {
+ buffer = NULL;
+ free_buffer = &buffer; /* marker for assertion */
+ }
+ for (access_map = 0;
+ access_map < nr_core_map_types;
+ access_map++) {
+ switch (access_map) {
+ case core_read_map:
+ if (access & access_read)
+ core_map_attach(memory->map + access_map,
+ attach,
+ space, addr, nr_bytes,
+ client, buffer, free_buffer);
+ free_buffer = NULL;
+ break;
+ case core_write_map:
+ if (access & access_write)
+ core_map_attach(memory->map + access_map,
+ attach,
+ space, addr, nr_bytes,
+ client, buffer, free_buffer);
+ free_buffer = NULL;
+ break;
+ case core_execute_map:
+ if (access & access_exec)
+ core_map_attach(memory->map + access_map,
+ attach,
+ space, addr, nr_bytes,
+ client, buffer, free_buffer);
+ free_buffer = NULL;
+ break;
+ default:
+ error("core_attach() internal error\n");
+ break;
+ }
+ }
+ /* allocated buffer must attach to at least one thing */
+ ASSERT(free_buffer == NULL);
+}
+
+
+STATIC_INLINE_CORE\
+(core_mapping *)
+core_map_find_mapping(core_map *map,
+ unsigned_word addr,
+ unsigned nr_bytes,
+ cpu *processor,
+ unsigned_word cia,
+ int abort) /*either 0 or 1 - helps inline */
+{
+ core_mapping *mapping = map->first;
+ ASSERT((addr & (nr_bytes - 1)) == 0); /* must be aligned */
+ ASSERT((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
+ while (mapping != NULL) {
+ if (addr >= mapping->base
+ && (addr + (nr_bytes - 1)) <= mapping->bound)
+ return mapping;
+ mapping = mapping->next;
+ }
+ if (abort)
+ error("core_find_mapping() - access to unmaped address, attach a default map to handle this - addr=0x%x nr_bytes=0x%x processor=0x%x cia=0x%x\n",
+ addr, nr_bytes, processor, cia);
+ return NULL;
+}
+
+
+STATIC_INLINE_CORE\
+(void *)
+core_translate(core_mapping *mapping,
+ unsigned_word addr)
+{
+ return (void *)(((char *)mapping->buffer) + addr - mapping->base);
+}
+
+
+INLINE_CORE\
+(unsigned)
+core_map_read_buffer(core_map *map,
+ void *buffer,
+ unsigned_word addr,
+ unsigned len)
+{
+ unsigned count = 0;
+ while (count < len) {
+ unsigned_word raddr = addr + count;
+ core_mapping *mapping =
+ core_map_find_mapping(map,
+ raddr, 1,
+ NULL, /*processor*/
+ 0, /*cia*/
+ 0); /*dont-abort*/
+ if (mapping == NULL)
+ break;
+ if (mapping->device != NULL) {
+ int nr_bytes = len - count;
+ if (raddr + nr_bytes - 1> mapping->bound)
+ nr_bytes = mapping->bound - raddr + 1;
+ if (device_io_read_buffer(mapping->device,
+ (unsigned_1*)buffer + count,
+ mapping->space,
+ raddr,
+ nr_bytes,
+ 0, /*processor*/
+ 0 /*cpu*/) != nr_bytes)
+ break;
+ count += nr_bytes;
+ }
+ else {
+ ((unsigned_1*)buffer)[count] =
+ *(unsigned_1*)core_translate(mapping, raddr);
+ count += 1;
+ }
+ }
+ return count;
+}
+
+
+INLINE_CORE\
+(unsigned)
+core_map_write_buffer(core_map *map,
+ const void *buffer,
+ unsigned_word addr,
+ unsigned len)
+{
+ unsigned count = 0;
+ while (count < len) {
+ unsigned_word raddr = addr + count;
+ core_mapping *mapping = core_map_find_mapping(map,
+ raddr, 1,
+ NULL, /*processor*/
+ 0, /*cia*/
+ 0); /*dont-abort*/
+ if (mapping == NULL)
+ break;
+ if (mapping->device != NULL) {
+ int nr_bytes = len - count;
+ if (raddr + nr_bytes - 1 > mapping->bound)
+ nr_bytes = mapping->bound - raddr + 1;
+ if (device_io_write_buffer(mapping->device,
+ (unsigned_1*)buffer + count,
+ mapping->space,
+ raddr,
+ nr_bytes,
+ 0, /*processor*/
+ 0 /*cpu*/) != nr_bytes)
+ break;
+ count += nr_bytes;
+ }
+ else {
+ *(unsigned_1*)core_translate(mapping, raddr) =
+ ((unsigned_1*)buffer)[count];
+ count += 1;
+ }
+ }
+ return count;
+}
+
+
+/* define the read/write 1/2/4/8/word functions */
+
+#define N 1
+#include "corefile-n.h"
+#undef N
+
+#define N 2
+#include "corefile-n.h"
+#undef N
+
+#define N 4
+#include "corefile-n.h"
+#undef N
+
+#define N 8
+#include "corefile-n.h"
+#undef N
+
+#define N word
+#include "corefile-n.h"
+#undef N
+
+#endif /* _CORE_C_ */
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