diff options
author | Harry Liebel <Harry.Liebel@arm.com> | 2014-02-14 14:42:48 +0000 |
---|---|---|
committer | Dan Handley <dan.handley@arm.com> | 2014-02-17 18:51:44 +0000 |
commit | 561cd33eceaff56a1c6cabe5a3e6e03e21e9dc9a (patch) | |
tree | 838cc81a5f823db5344f3581cf7f77e72efd636c /drivers/io/io_memmap.c | |
parent | f58ad36f2f51798b093d282b56a3a311fdc78ca9 (diff) |
Add Firmware Image Package (FIP) driver
The Firmware Image Package (FIP) driver allows for data to be loaded
from a FIP on platform storage. The FVP supports loading bootloader
images from a FIP located in NOR FLASH.
The implemented FVP policy states that bootloader images will be
loaded from a FIP in NOR FLASH if available and fall back to loading
individual images from semi-hosting.
NOTE:
- BL3-3(e.g. UEFI) is loaded into DRAM and needs to be configured
to run from the BL33_BASE address. This is currently set to
DRAM_BASE+128MB for the FVP.
Change-Id: I2e4821748e3376b5f9e467cf3ec09509e43579a0
Diffstat (limited to 'drivers/io/io_memmap.c')
-rw-r--r-- | drivers/io/io_memmap.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/io/io_memmap.c b/drivers/io/io_memmap.c new file mode 100644 index 0000000..0809973 --- /dev/null +++ b/drivers/io/io_memmap.c @@ -0,0 +1,240 @@ +/* + * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <assert.h> +#include <string.h> +#include "io_storage.h" +#include "io_driver.h" +#include "debug.h" + +/* As we need to be able to keep state for seek, only one file can be open + * at a time. Make this a structure and point to the entity->info. When we + * can malloc memory we can change this to support more open files. + */ +typedef struct { + /* Use the 'in_use' flag as any value for base and file_pos could be + * valid. + */ + int in_use; + size_t base; + size_t file_pos; +} file_state; + +static file_state current_file = {0}; + +/* Identify the device type as memmap */ +io_type device_type_memmap(void) +{ + return IO_TYPE_MEMMAP; +} + +/* Memmap device functions */ +static int memmap_dev_open(void *spec, struct io_dev_info **dev_info); +static int memmap_block_open(struct io_dev_info *dev_info, const void *spec, + struct io_entity *entity); +static int memmap_block_seek(struct io_entity *entity, int mode, + ssize_t offset); +static int memmap_block_read(struct io_entity *entity, void *buffer, + size_t length, size_t *length_read); +static int memmap_block_write(struct io_entity *entity, const void *buffer, + size_t length, size_t *length_written); +static int memmap_block_close(struct io_entity *entity); +static int memmap_dev_close(struct io_dev_info *dev_info); + + +static struct io_dev_connector memmap_dev_connector = { + .dev_open = memmap_dev_open +}; + + +static struct io_dev_funcs memmap_dev_funcs = { + .type = device_type_memmap, + .open = memmap_block_open, + .seek = memmap_block_seek, + .size = NULL, + .read = memmap_block_read, + .write = memmap_block_write, + .close = memmap_block_close, + .dev_init = NULL, + .dev_close = memmap_dev_close, +}; + + +static struct io_dev_info memmap_dev_info = { + .funcs = &memmap_dev_funcs, + .info = (uintptr_t)NULL +}; + + +/* Open a connection to the memmap device */ +static int memmap_dev_open(void *spec __attribute__((unused)), + struct io_dev_info **dev_info) +{ + assert(dev_info != NULL); + *dev_info = &memmap_dev_info; + + return IO_SUCCESS; +} + + + +/* Close a connection to the memmap device */ +static int memmap_dev_close(struct io_dev_info *dev_info) +{ + /* NOP */ + /* TODO: Consider tracking open files and cleaning them up here */ + return IO_SUCCESS; +} + + +/* Open a file on the memmap device */ +/* TODO: Can we do any sensible limit checks on requested memory */ +static int memmap_block_open(struct io_dev_info *dev_info, const void *spec, + struct io_entity *entity) +{ + int result = IO_FAIL; + const io_block_spec *block_spec = (io_block_spec *)spec; + + /* Since we need to track open state for seek() we only allow one open + * spec at a time. When we have dynamic memory we can malloc and set + * entity->info. + */ + if (current_file.in_use == 0) { + assert(block_spec != NULL); + assert(entity != NULL); + + current_file.in_use = 1; + current_file.base = block_spec->offset; + /* File cursor offset for seek and incremental reads etc. */ + current_file.file_pos = 0; + entity->info = (uintptr_t)¤t_file; + result = IO_SUCCESS; + } else { + ERROR("A Memmap device is already active. Close first.\n"); + result = IO_RESOURCES_EXHAUSTED; + } + + return result; +} + + +/* Seek to a particular file offset on the memmap device */ +static int memmap_block_seek(struct io_entity *entity, int mode, ssize_t offset) +{ + int result = IO_FAIL; + + /* We only support IO_SEEK_SET for the moment. */ + if (mode == IO_SEEK_SET) { + assert(entity != NULL); + + /* TODO: can we do some basic limit checks on seek? */ + ((file_state *)entity->info)->file_pos = offset; + result = IO_SUCCESS; + } else { + result = IO_FAIL; + } + + return result; +} + + +/* Read data from a file on the memmap device */ +static int memmap_block_read(struct io_entity *entity, void *buffer, + size_t length, size_t *length_read) +{ + file_state *fp; + + assert(entity != NULL); + assert(buffer != NULL); + assert(length_read != NULL); + + fp = (file_state *)entity->info; + + memcpy(buffer, (void *)(fp->base + fp->file_pos), length); + + *length_read = length; + /* advance the file 'cursor' for incremental reads */ + fp->file_pos += length; + + return IO_SUCCESS; +} + + +/* Write data to a file on the memmap device */ +static int memmap_block_write(struct io_entity *entity, const void *buffer, + size_t length, size_t *length_written) +{ + file_state *fp; + + assert(entity != NULL); + assert(buffer != NULL); + assert(length_written != NULL); + + fp = (file_state *)entity->info; + + memcpy((void *)(fp->base + fp->file_pos), buffer, length); + + *length_written = length; + + /* advance the file 'cursor' for incremental writes */ + fp->file_pos += length; + + return IO_SUCCESS; +} + + +/* Close a file on the memmap device */ +static int memmap_block_close(struct io_entity *entity) +{ + assert(entity != NULL); + + entity->info = 0; + + /* This would be a mem free() if we had malloc.*/ + memset((void *)¤t_file, 0, sizeof(current_file)); + + return IO_SUCCESS; +} + + +/* Exported functions */ + +/* Register the memmap driver with the IO abstraction */ +int register_io_dev_memmap(struct io_dev_connector **dev_con) +{ + int result = IO_FAIL; + assert(dev_con != NULL); + + result = io_register_device(&memmap_dev_info); + if (result == IO_SUCCESS) + *dev_con = &memmap_dev_connector; + + return result; +} |