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-rw-r--r--sim/m68hc11/dv-nvram.c351
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diff --git a/sim/m68hc11/dv-nvram.c b/sim/m68hc11/dv-nvram.c
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--- a/sim/m68hc11/dv-nvram.c
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@@ -1,351 +0,0 @@
-/* dv-nvram.c -- Generic driver for a non volatile ram (battery saved)
- Copyright (C) 1999, 2000 Free Software Foundation, Inc.
- Written by Stephane Carrez (stcarrez@worldnet.fr)
- (From a driver model Contributed by Cygnus Solutions.)
-
- 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"
-#include "sim-assert.h"
-
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-
-
-/* DEVICE
-
- nvram - Non Volatile Ram
-
-
- DESCRIPTION
-
- Implements a generic battery saved CMOS ram. This ram device does
- not contain any realtime clock and does not generate any interrupt.
- The ram content is loaded from a file and saved when it is changed.
- It is intended to be generic.
-
-
- PROPERTIES
-
- reg <base> <length>
-
- Base and size of the non-volatile ram bank.
-
- file <path>
-
- Path where the memory must be saved or loaded when we start.
-
- mode {map | save-modified | save-all}
-
- Controls how to load and save the memory content.
-
- map The file is mapped in memory
- save-modified The simulator keeps an open file descriptor to
- the file and saves portion of memory which are
- modified.
- save-all The simulator saves the complete memory each time
- it's modified (it does not keep an open file
- descriptor).
-
-
- PORTS
-
- None.
-
-
- NOTES
-
- This device is independent of the Motorola 68hc11.
-
- */
-
-
-
-/* static functions */
-
-/* Control of how to access the ram and save its content. */
-
-enum nvram_mode
-{
- /* Save the complete ram block each time it's changed.
- We don't keep an open file descriptor. This should be
- ok for small memory banks. */
- NVRAM_SAVE_ALL,
-
- /* Save only the memory bytes which are modified.
- This mode means that we have to keep an open file
- descriptor (O_RDWR). It's good for middle sized memory banks. */
- NVRAM_SAVE_MODIFIED,
-
- /* Map file in memory (not yet implemented).
- This mode is suitable for large memory banks. We don't allocate
- a buffer to represent the ram, instead it's mapped in memory
- with mmap. */
- NVRAM_MAP_FILE
-};
-
-struct nvram
-{
- address_word base_address; /* Base address of ram. */
- unsigned size; /* Size of ram. */
- unsigned8 *data; /* Pointer to ram memory. */
- const char *file_name; /* Path of ram file. */
- int fd; /* File description of opened ram file. */
- enum nvram_mode mode; /* How load/save ram file. */
-};
-
-
-
-/* Finish off the partially created hw device. Attach our local
- callbacks. Wire up our port names etc. */
-
-static hw_io_read_buffer_method nvram_io_read_buffer;
-static hw_io_write_buffer_method nvram_io_write_buffer;
-
-
-
-static void
-attach_nvram_regs (struct hw *me, struct nvram *controller)
-{
- unsigned_word attach_address;
- int attach_space;
- unsigned attach_size;
- reg_property_spec reg;
- int result, oerrno;
-
- /* Get ram bank description (base and size). */
- if (hw_find_property (me, "reg") == NULL)
- hw_abort (me, "Missing \"reg\" property");
-
- if (!hw_find_reg_array_property (me, "reg", 0, &reg))
- hw_abort (me, "\"reg\" property must contain one addr/size entry");
-
- hw_unit_address_to_attach_address (hw_parent (me),
- &reg.address,
- &attach_space,
- &attach_address,
- me);
- hw_unit_size_to_attach_size (hw_parent (me),
- &reg.size,
- &attach_size, me);
-
- hw_attach_address (hw_parent (me), 0,
- attach_space, attach_address, attach_size,
- me);
-
- controller->mode = NVRAM_SAVE_ALL;
- controller->base_address = attach_address;
- controller->size = attach_size;
- controller->fd = -1;
-
- /* Get the file where the ram content must be loaded/saved. */
- if(hw_find_property (me, "file") == NULL)
- hw_abort (me, "Missing \"file\" property");
-
- controller->file_name = hw_find_string_property (me, "file");
-
- /* Get the mode which defines how to save the memory. */
- if(hw_find_property (me, "mode") != NULL)
- {
- const char *value = hw_find_string_property (me, "mode");
-
- if (strcmp (value, "map") == 0)
- controller->mode = NVRAM_MAP_FILE;
- else if (strcmp (value, "save-modified") == 0)
- controller->mode = NVRAM_SAVE_MODIFIED;
- else if (strcmp (value, "save-all") == 0)
- controller->mode = NVRAM_SAVE_ALL;
- else
- hw_abort (me, "illegal value for mode parameter `%s': "
- "use map, save-modified or save-all", value);
- }
-
- /* Initialize the ram by loading/mapping the file in memory.
- If the file does not exist, create and give it some content. */
- switch (controller->mode)
- {
- case NVRAM_MAP_FILE:
- hw_abort (me, "'map' mode is not yet implemented, use 'save-modified'");
- break;
-
- case NVRAM_SAVE_MODIFIED:
- case NVRAM_SAVE_ALL:
- controller->data = (char*) hw_malloc (me, attach_size);
- if (controller->data == 0)
- hw_abort (me, "Not enough memory, try to use the mode 'map'");
-
- memset (controller->data, 0, attach_size);
- controller->fd = open (controller->file_name, O_RDWR);
- if (controller->fd < 0)
- {
- controller->fd = open (controller->file_name,
- O_RDWR | O_CREAT, 0644);
- if (controller->fd < 0)
- hw_abort (me, "Cannot open or create file '%s'",
- controller->file_name);
- result = write (controller->fd, controller->data, attach_size);
- if (result != attach_size)
- {
- oerrno = errno;
- hw_free (me, controller->data);
- close (controller->fd);
- errno = oerrno;
- hw_abort (me, "Failed to save the ram content");
- }
- }
- else
- {
- result = read (controller->fd, controller->data, attach_size);
- if (result != attach_size)
- {
- oerrno = errno;
- hw_free (me, controller->data);
- close (controller->fd);
- errno = oerrno;
- hw_abort (me, "Failed to load the ram content");
- }
- }
- if (controller->mode == NVRAM_SAVE_ALL)
- {
- close (controller->fd);
- controller->fd = -1;
- }
- break;
-
- default:
- break;
- }
-}
-
-
-static void
-nvram_finish (struct hw *me)
-{
- struct nvram *controller;
-
- controller = HW_ZALLOC (me, struct nvram);
-
- set_hw_data (me, controller);
- set_hw_io_read_buffer (me, nvram_io_read_buffer);
- set_hw_io_write_buffer (me, nvram_io_write_buffer);
-
- /* Attach ourself to our parent bus. */
- attach_nvram_regs (me, controller);
-}
-
-
-
-/* generic read/write */
-
-static unsigned
-nvram_io_read_buffer (struct hw *me,
- void *dest,
- int space,
- unsigned_word base,
- unsigned nr_bytes)
-{
- struct nvram *controller = hw_data (me);
-
- HW_TRACE ((me, "read 0x%08lx %d [%ld]",
- (long) base, (int) nr_bytes,
- (long) (base - controller->base_address)));
-
- base -= controller->base_address;
- if (base + nr_bytes > controller->size)
- nr_bytes = controller->size - base;
-
- memcpy (dest, &controller->data[base], nr_bytes);
- return nr_bytes;
-}
-
-
-
-static unsigned
-nvram_io_write_buffer (struct hw *me,
- const void *source,
- int space,
- unsigned_word base,
- unsigned nr_bytes)
-{
- struct nvram *controller = hw_data (me);
-
- HW_TRACE ((me, "write 0x%08lx %d [%ld]",
- (long) base, (int) nr_bytes,
- (long) (base - controller->base_address)));
-
- base -= controller->base_address;
- if (base + nr_bytes > controller->size)
- nr_bytes = controller->size - base;
-
- switch (controller->mode)
- {
- case NVRAM_SAVE_ALL:
- {
- int fd, result, oerrno;
-
- fd = open (controller->file_name, O_WRONLY, 0644);
- if (fd < 0)
- {
- return 0;
- }
-
- memcpy (&controller->data[base], source, nr_bytes);
- result = write (fd, controller->data, controller->size);
- oerrno = errno;
- close (fd);
- errno = oerrno;
-
- if (result != controller->size)
- {
- return 0;
- }
- return nr_bytes;
- }
-
- case NVRAM_SAVE_MODIFIED:
- {
- off_t pos;
- int result;
-
- pos = lseek (controller->fd, (off_t) base, SEEK_SET);
- if (pos != (off_t) base)
- return 0;
-
- result = write (controller->fd, source, nr_bytes);
- if (result < 0)
- return 0;
-
- nr_bytes = result;
- break;
- }
-
- default:
- break;
- }
- memcpy (&controller->data[base], source, nr_bytes);
- return nr_bytes;
-}
-
-
-const struct hw_descriptor dv_nvram_descriptor[] = {
- { "nvram", nvram_finish, },
- { NULL },
-};
-
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