mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-31 02:51:26 +00:00
625de1d4f0
Update code base to remove variables from the .data section, mainly by using const static data where possible and adding the const specifier as required. Most changes are to the IO subsystem, including the framework APIs. The FVP power management code is also affected. Delay initialization of the global static variable, next_image_type in bl31_main.c, until it is realy needed. Doing this moves the variable from the .data to the .bss section. Also review the IO interface for inconsistencies, using uintptr_t where possible instead of void *. Remove the io_handle and io_dev_handle typedefs, which were unnecessary, replacing instances with uintptr_t. Fixes ARM-software/tf-issues#107. Change-Id: I085a62197c82410b566e4698e5590063563ed304
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef __IO_DRIVER_H__
|
|
#define __IO_DRIVER_H__
|
|
|
|
#include <io_storage.h>
|
|
#include <platform.h> /* For MAX_IO_DEVICES */
|
|
#include <stdint.h>
|
|
|
|
|
|
/* Generic IO entity structure,representing an accessible IO construct on the
|
|
* device, such as a file */
|
|
typedef struct io_entity {
|
|
struct io_dev_info *dev_handle;
|
|
uintptr_t info;
|
|
} io_entity_t;
|
|
|
|
|
|
/* Device info structure, providing device-specific functions and a means of
|
|
* adding driver-specific state */
|
|
typedef struct io_dev_info {
|
|
const struct io_dev_funcs *funcs;
|
|
uintptr_t info;
|
|
} io_dev_info_t;
|
|
|
|
|
|
/* Structure used to create a connection to a type of device */
|
|
typedef struct io_dev_connector {
|
|
/* dev_open opens a connection to a particular device driver */
|
|
int (*dev_open)(const uintptr_t dev_spec, io_dev_info_t **dev_info);
|
|
} io_dev_connector_t;
|
|
|
|
|
|
/* Structure to hold device driver function pointers */
|
|
typedef struct io_dev_funcs {
|
|
io_type_t (*type)(void);
|
|
int (*open)(io_dev_info_t *dev_info, const uintptr_t spec,
|
|
io_entity_t *entity);
|
|
int (*seek)(io_entity_t *entity, int mode, ssize_t offset);
|
|
int (*size)(io_entity_t *entity, size_t *length);
|
|
int (*read)(io_entity_t *entity, uintptr_t buffer, size_t length,
|
|
size_t *length_read);
|
|
int (*write)(io_entity_t *entity, const uintptr_t buffer,
|
|
size_t length, size_t *length_written);
|
|
int (*close)(io_entity_t *entity);
|
|
int (*dev_init)(io_dev_info_t *dev_info, const uintptr_t init_params);
|
|
int (*dev_close)(io_dev_info_t *dev_info);
|
|
} io_dev_funcs_t;
|
|
|
|
|
|
/* IO platform data - used to track devices registered for a specific
|
|
* platform */
|
|
typedef struct io_plat_data {
|
|
const io_dev_info_t *devices[MAX_IO_DEVICES];
|
|
unsigned int dev_count;
|
|
} io_plat_data_t;
|
|
|
|
|
|
/* Operations intended to be performed during platform initialisation */
|
|
|
|
/* Initialise the IO layer */
|
|
void io_init(io_plat_data_t *data);
|
|
|
|
/* Register a device driver */
|
|
int io_register_device(const io_dev_info_t *dev_info);
|
|
|
|
#endif /* __IO_DRIVER_H__ */
|