92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/*
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* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PLAT_PARAMS_H__
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#define __PLAT_PARAMS_H__
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#include <stdint.h>
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/*
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* We defined several plat parameter structs for BL2 to pass platform related
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* parameters to Rockchip BL31 platform code. All plat parameters start with
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* a common header, which has a type field to indicate the parameter type, and
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* a next pointer points to next parameter. If the parameter is the last one in
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* the list, next pointer will points to NULL. After the header comes the
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* variable-sized members that describe the parameter. The picture below shows
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* how the parameters are kept in memory.
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*
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* head of list ---> +----------------+ --+
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* | type | |
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* +----------------+ |--> struct bl31_plat_param
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* +----| next | |
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* | +----------------+ --+
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* | | parameter data |
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* | +----------------+
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* |
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* +--> +----------------+ --+
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* | type | |
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* +----------------+ |--> struct bl31_plat_param
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* NULL <---| next | |
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* +----------------+ --+
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* | parameter data |
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* +----------------+
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*
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* Note: The SCTLR_EL3.A bit (Alignment fault check enable) of ARM TF is set,
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* so be sure each parameter struct starts on 64-bit aligned address. If not,
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* alignment fault will occur during accessing its data member.
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*/
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/* param type */
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enum {
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PARAM_NONE = 0,
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PARAM_RESET,
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PARAM_POWEROFF,
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};
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struct gpio_info {
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uint8_t polarity;
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uint8_t direction;
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uint8_t pull_mode;
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uint32_t index;
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};
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/* common header for all plat parameter type */
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struct bl31_plat_param {
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uint64_t type;
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void *next;
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};
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struct bl31_gpio_param {
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struct bl31_plat_param h;
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struct gpio_info gpio;
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};
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#endif /* __PLAT_PARAMS_H__ */
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