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/*
* Always ON (AON) register interface between bootloader and Linux
*
* Copyright © 2014-2017 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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.
*/
#ifndef __BRCMSTB_AON_DEFS_H__
#define __BRCMSTB_AON_DEFS_H__
#include <linux/compiler.h>
/* Magic number in upper 16-bits */
#define BRCMSTB_S3_MAGIC_MASK 0xffff0000
#define BRCMSTB_S3_MAGIC_SHORT 0x5AFE0000
enum {
/* Restore random key for AES memory verification (off = fixed key) */
S3_FLAG_LOAD_RANDKEY = (1 << 0),
/* Scratch buffer page table is present */
S3_FLAG_SCRATCH_BUFFER_TABLE = (1 << 1),
/* Skip all memory verification */
S3_FLAG_NO_MEM_VERIFY = (1 << 2),
/*
* Modification of this bit reserved for bootloader only.
* 1=PSCI started Linux, 0=Direct jump to Linux.
*/
S3_FLAG_PSCI_BOOT = (1 << 3),
/*
* Modification of this bit reserved for bootloader only.
* 1=64 bit boot, 0=32 bit boot.
*/
S3_FLAG_BOOTED64 = (1 << 4),
};
#define BRCMSTB_HASH_LEN (128 / 8) /* 128-bit hash */
#define AON_REG_MAGIC_FLAGS 0x00
#define AON_REG_CONTROL_LOW 0x04
#define AON_REG_CONTROL_HIGH 0x08
#define AON_REG_S3_HASH 0x0c /* hash of S3 params */
#define AON_REG_CONTROL_HASH_LEN 0x1c
#define AON_REG_PANIC 0x20
#define BRCMSTB_S3_MAGIC 0x5AFEB007
#define BRCMSTB_PANIC_MAGIC 0x512E115E
#define BOOTLOADER_SCRATCH_SIZE 64
#define BRCMSTB_DTU_STATE_MAP_ENTRIES (8*1024)
#define BRCMSTB_DTU_CONFIG_ENTRIES (512)
#define BRCMSTB_DTU_COUNT (2)
#define IMAGE_DESCRIPTORS_BUFSIZE (2 * 1024)
#define S3_BOOTLOADER_RESERVED (S3_FLAG_PSCI_BOOT | S3_FLAG_BOOTED64)
struct brcmstb_bootloader_dtu_table {
uint32_t dtu_state_map[BRCMSTB_DTU_STATE_MAP_ENTRIES];
uint32_t dtu_config[BRCMSTB_DTU_CONFIG_ENTRIES];
};
/*
* Bootloader utilizes a custom parameter block left in DRAM for handling S3
* warm resume
*/
struct brcmstb_s3_params {
/* scratch memory for bootloader */
uint8_t scratch[BOOTLOADER_SCRATCH_SIZE];
uint32_t magic; /* BRCMSTB_S3_MAGIC */
uint64_t reentry; /* PA */
/* descriptors */
uint32_t hash[BRCMSTB_HASH_LEN / 4];
/*
* If 0, then ignore this parameter (there is only one set of
* descriptors)
*
* If non-0, then a second set of descriptors is stored at:
*
* descriptors + desc_offset_2
*
* The MAC result of both descriptors is XOR'd and stored in @hash
*/
uint32_t desc_offset_2;
/*
* (Physical) address of a brcmstb_bootloader_scratch_table, for
* providing a large DRAM buffer to the bootloader
*/
uint64_t buffer_table;
uint32_t spare[70];
uint8_t descriptors[IMAGE_DESCRIPTORS_BUFSIZE];
/*
* Must be last member of struct. See brcmstb_pm_s3_finish() for reason.
*/
struct brcmstb_bootloader_dtu_table dtu[BRCMSTB_DTU_COUNT];
} __packed;
#endif /* __BRCMSTB_AON_DEFS_H__ */
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