/* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#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);
free(tbd->free_buffer);
}
free(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_ */