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/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef __PLAT_PARAMS_H__
#define __PLAT_PARAMS_H__
#include <stdint.h>
/*
* We defined several plat parameter structs for BL2 to pass platform related
* parameters to Rockchip BL31 platform code. All plat parameters start with
* a common header, which has a type field to indicate the parameter type, and
* a next pointer points to next parameter. If the parameter is the last one in
* the list, next pointer will points to NULL. After the header comes the
* variable-sized members that describe the parameter. The picture below shows
* how the parameters are kept in memory.
*
* head of list ---> +----------------+ --+
* | type | |
* +----------------+ |--> struct bl31_plat_param
* +----| next | |
* | +----------------+ --+
* | | parameter data |
* | +----------------+
* |
* +--> +----------------+ --+
* | type | |
* +----------------+ |--> struct bl31_plat_param
* NULL <---| next | |
* +----------------+ --+
* | parameter data |
* +----------------+
*
* Note: The SCTLR_EL3.A bit (Alignment fault check enable) of ARM TF is set,
* so be sure each parameter struct starts on 64-bit aligned address. If not,
* alignment fault will occur during accessing its data member.
*/
#define BL31_GPIO_DIR_OUT 0
#define BL31_GPIO_DIR_IN 1
#define BL31_GPIO_LEVEL_LOW 0
#define BL31_GPIO_LEVEL_HIGH 1
#define BL31_GPIO_PULL_NONE 0
#define BL31_GPIO_PULL_UP 1
#define BL31_GPIO_PULL_DOWN 2
/* param type */
enum {
PARAM_NONE = 0,
PARAM_RESET,
PARAM_POWEROFF,
PARAM_SUSPEND_GPIO,
PARAM_SUSPEND_APIO,
};
struct apio_info {
uint8_t apio1 : 1;
uint8_t apio2 : 1;
uint8_t apio3 : 1;
uint8_t apio4 : 1;
uint8_t apio5 : 1;
};
struct gpio_info {
uint8_t polarity;
uint8_t direction;
uint8_t pull_mode;
uint32_t index;
};
/* common header for all plat parameter type */
struct bl31_plat_param {
uint64_t type;
void *next;
};
struct bl31_gpio_param {
struct bl31_plat_param h;
struct gpio_info gpio;
};
struct bl31_apio_param {
struct bl31_plat_param h;
struct apio_info apio;
};
#endif /* __PLAT_PARAMS_H__ */