old-cross-binutils/sim/ppc/corefile.c

496 lines
12 KiB
C

/* This file is part of the program psim.
Copyright (C) 1994-1995, 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_
#ifndef STATIC_INLINE_CORE
#define STATIC_INLINE_CORE STATIC_INLINE
#endif
#include "basics.h"
#include "device_tree.h"
#include "corefile.h"
typedef struct _core_mapping core_mapping;
struct _core_mapping {
/* ram map */
int free_buffer;
void *buffer;
/* device map */
const device *device;
device_io_read_buffer_callback *reader;
device_io_write_buffer_callback *writer;
/* common */
int space;
unsigned_word base;
unsigned_word bound;
unsigned nr_bytes;
core_mapping *next;
};
struct _core_map {
core_mapping *first;
core_mapping *default_map;
};
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)
{
core *new_core = ZALLOC(core);
return new_core;
}
STATIC_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) {
ASSERT(tbd->buffer != NULL);
zfree(tbd->buffer);
}
zfree(tbd);
}
map->first = NULL;
/* blow away the default */
if (map->default_map != NULL) {
ASSERT(map->default_map->buffer == NULL);
zfree(map->default_map);
}
map->default_map = 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,
const device *device,
void *buffer,
int free_buffer)
{
core_mapping *new_mapping = ZALLOC(core_mapping);
switch (attach) {
case attach_default:
case attach_callback:
new_mapping->device = device;
new_mapping->reader = device->callback->io_read_buffer;
new_mapping->writer = device->callback->io_write_buffer;
break;
case attach_raw_memory:
new_mapping->buffer = buffer;
new_mapping->free_buffer = free_buffer;
break;
default:
error("new_core_mapping() - internal error - unknown attach type %d\n",
attach);
}
/* common */
new_mapping->space = space;
new_mapping->base = addr;
new_mapping->nr_bytes = nr_bytes;
new_mapping->bound = addr + (nr_bytes - 1);
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 */
const device *device, /*callback/default*/
void *buffer, /*raw_memory*/
int free_buffer) /*raw_memory*/
{
if (attach == attach_default) {
if (access_map->default_map != NULL)
error("core_map_attach() default mapping already in place\n");
ASSERT(buffer == NULL);
access_map->default_map = new_core_mapping(attach,
space, addr, nr_bytes,
device, buffer, free_buffer);
}
else {
/* 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)
error("core_map_attach() size == 0\n");
/* find the insertion point (between last/next) */
next_mapping = access_map->first;
last_mapping = &access_map->first;
while(next_mapping != NULL && next_mapping->bound < addr) {
/* 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 */
if (next_mapping != NULL && next_mapping->base < (addr + (nr_bytes - 1))) {
error("core_map_attach() map overlap\n");
}
/* create/insert the new mapping */
*last_mapping = new_core_mapping(attach,
space, addr, nr_bytes,
device, 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 */
const device *device) /*callback/default*/
{
core_map_types access_map;
int free_buffer = 0;
void *buffer = NULL;
ASSERT(attach == attach_default || nr_bytes > 0);
if (attach == attach_raw_memory)
buffer = zalloc(nr_bytes);
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,
device, buffer, !free_buffer);
free_buffer ++;
break;
case core_write_map:
if (access & access_write)
core_map_attach(memory->map + access_map,
attach,
space, addr, nr_bytes,
device, buffer, !free_buffer);
free_buffer ++;
break;
case core_execute_map:
if (access & access_exec)
core_map_attach(memory->map + access_map,
attach,
space, addr, nr_bytes,
device, buffer, !free_buffer);
free_buffer ++;
break;
default:
error("core_attach() internal error\n");
break;
}
}
ASSERT(free_buffer > 0); /* must attach to at least one thing */
}
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 (map->default_map != NULL)
return map->default_map;
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 mapping->buffer + addr - mapping->base;
}
INLINE_CORE unsigned
core_map_read_buffer(core_map *map,
void *buffer,
unsigned_word addr,
unsigned len)
{
unsigned count;
unsigned_1 byte;
for (count = 0; count < len; count++) {
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->reader != NULL) {
if (mapping->reader(mapping->device,
&byte,
mapping->space,
raddr - mapping->base,
1, /* nr_bytes */
0, /*processor*/
0 /*cpu*/) != 1)
break;
}
else
byte = *(unsigned_1*)core_translate(mapping,
raddr);
((unsigned_1*)buffer)[count] = T2H_1(byte);
}
return count;
}
INLINE_CORE unsigned
core_map_write_buffer(core_map *map,
const void *buffer,
unsigned_word addr,
unsigned len)
{
unsigned count;
unsigned_1 byte;
for (count = 0; count < len; count++) {
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;
byte = H2T_1(((unsigned_1*)buffer)[count]);
if (mapping->writer != NULL) {
if (mapping->writer(mapping->device,
&byte,
mapping->space,
raddr - mapping->base,
1, /*nr_bytes*/
0, /*processor*/
0 /*cpu*/) != 1)
break;
}
else
*(unsigned_1*)core_translate(mapping, raddr) = byte;
}
return count;
}
/* Top level core(root) device: core@garbage
The core device captures incomming dma requests and changes them to
outgoing io requests. */
STATIC_INLINE_CORE void
core_init_callback(const device *me,
psim *system)
{
core *memory = (core*)me->data;
DTRACE_INIT(core);
core_init(memory);
}
STATIC_INLINE_CORE void
core_attach_address_callback(const device *me,
const char *name,
attach_type attach,
int space,
unsigned_word addr,
unsigned nr_bytes,
access_type access,
const device *who) /*callback/default*/
{
core *memory = (core*)me->data;
DTRACE_ATTACH_ADDRESS(core);
if (space != 0)
error("core_attach_address_callback() invalid address space\n");
core_attach(memory,
attach,
space,
access,
addr,
nr_bytes,
who);
}
STATIC_INLINE_CORE unsigned
core_dma_read_buffer_callback(const device *me,
void *dest,
int space,
unsigned_word addr,
unsigned nr_bytes)
{
core *memory = (core*)me->data;
DTRACE_DMA_READ_BUFFER(core);
return core_map_read_buffer(core_readable(memory),
dest,
addr,
nr_bytes);
}
STATIC_INLINE_CORE unsigned
core_dma_write_buffer_callback(const device *me,
const void *source,
int space,
unsigned_word addr,
unsigned nr_bytes,
int violate_read_only_section)
{
core *memory = (core*)me->data;
core_map *map = (violate_read_only_section
? core_readable(memory)
: core_writeable(memory));
DTRACE_DMA_WRITE_BUFFER(core);
return core_map_write_buffer(map,
source,
addr,
nr_bytes);
}
static device_callbacks const core_callbacks = {
core_init_callback,
core_attach_address_callback,
unimp_device_detach_address,
unimp_device_io_read_buffer,
unimp_device_io_write_buffer,
core_dma_read_buffer_callback,
core_dma_write_buffer_callback,
unimp_device_attach_interrupt,
unimp_device_detach_interrupt,
unimp_device_interrupt,
unimp_device_interrupt_ack,
unimp_device_ioctl,
};
INLINE_CORE const device *
core_device_create(core *memory)
{
return device_create_from("core", "/", memory, &core_callbacks, NULL);
}
/* define the read/write 1/2/4/8/word functions */
#undef N
#define N 1
#include "core_n.h"
#undef N
#define N 2
#include "core_n.h"
#undef N
#define N 4
#include "core_n.h"
#undef N
#define N 8
#include "core_n.h"
#undef N
#define N word
#include "core_n.h"
#endif /* _CORE_C_ */