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https://github.com/ARM-software/arm-trusted-firmware.git
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e6712cf547
This patch updates the state machine to "not present" if the bpmp firmware is not found in the system during boot. The suspend handler also checks now if the interface exists, before updating the internal state machine. Reported by: Kalyani Chidambaram Vaidyanathan <kalyanic@nvidia.com> Change-Id: If8fd7f8e412bb603944555c24826855226e7f48c Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
127 lines
3 KiB
C
127 lines
3 KiB
C
/*
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* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef BPMP_H
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#define BPMP_H
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#include <stdint.h>
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/* macro to enable clock to the Atomics block */
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#define CAR_ENABLE_ATOMICS (1U << 16)
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/* command to get the channel base addresses from bpmp */
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#define ATOMIC_CMD_GET 4U
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/* Hardware IRQ # used to signal bpmp of an incoming command */
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#define INT_SHR_SEM_OUTBOX_FULL 6U
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/* macros to decode the bpmp's state */
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#define CH_MASK(ch) ((uint32_t)0x3 << ((ch) * 2U))
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#define MA_FREE(ch) ((uint32_t)0x2 << ((ch) * 2U))
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#define MA_ACKD(ch) ((uint32_t)0x3 << ((ch) * 2U))
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/* response from bpmp to indicate it has powered up */
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#define SIGN_OF_LIFE 0xAAAAAAAAU
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/* flags to indicate bpmp driver's state */
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#define BPMP_NOT_PRESENT 0xF00DBEEFU
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#define BPMP_INIT_COMPLETE 0xBEEFF00DU
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#define BPMP_INIT_PENDING 0xDEADBEEFU
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#define BPMP_SUSPEND_ENTRY 0xF00DCAFEU
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/* requests serviced by the bpmp */
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#define MRQ_PING 0
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#define MRQ_QUERY_TAG 1
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#define MRQ_DO_IDLE 2
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#define MRQ_TOLERATE_IDLE 3
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#define MRQ_MODULE_LOAD 4
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#define MRQ_MODULE_UNLOAD 5
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#define MRQ_SWITCH_CLUSTER 6
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#define MRQ_TRACE_MODIFY 7
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#define MRQ_WRITE_TRACE 8
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#define MRQ_THREADED_PING 9
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#define MRQ_CPUIDLE_USAGE 10
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#define MRQ_MODULE_MAIL 11
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#define MRQ_SCX_ENABLE 12
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#define MRQ_BPMPIDLE_USAGE 14
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#define MRQ_HEAP_USAGE 15
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#define MRQ_SCLK_SKIP_SET_RATE 16
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#define MRQ_ENABLE_SUSPEND 17
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#define MRQ_PASR_MASK 18
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#define MRQ_DEBUGFS 19
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#define MRQ_THERMAL 27
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/* Tegra PM states as known to BPMP */
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#define TEGRA_PM_CC1 9
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#define TEGRA_PM_CC4 12
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#define TEGRA_PM_CC6 14
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#define TEGRA_PM_CC7 15
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#define TEGRA_PM_SC1 17
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#define TEGRA_PM_SC2 18
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#define TEGRA_PM_SC3 19
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#define TEGRA_PM_SC4 20
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#define TEGRA_PM_SC7 23
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/* flag to indicate if entry into a CCx power state is allowed */
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#define BPMP_CCx_ALLOWED 0U
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/* number of communication channels to interact with the bpmp */
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#define NR_CHANNELS 4U
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/* flag to ask bpmp to acknowledge command packet */
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#define NO_ACK (0U << 0U)
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#define DO_ACK (1U << 0U)
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/* size of the command/response data */
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#define MSG_DATA_MAX_SZ 120U
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/**
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* command/response packet to/from the bpmp
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*
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* command
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* -------
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* code: MRQ_* command
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* flags: DO_ACK or NO_ACK
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* data:
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* [0] = cpu #
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* [1] = cluster power state (TEGRA_PM_CCx)
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* [2] = system power state (TEGRA_PM_SCx)
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*
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* response
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* ---------
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* code: error code
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* flags: not used
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* data:
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* [0-3] = response value
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*/
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typedef struct mb_data {
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int32_t code;
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uint32_t flags;
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uint8_t data[MSG_DATA_MAX_SZ];
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} mb_data_t;
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/**
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* Function to initialise the interface with the bpmp
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*/
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int tegra_bpmp_init(void);
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/**
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* Function to suspend the interface with the bpmp
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*/
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void tegra_bpmp_suspend(void);
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/**
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* Function to resume the interface with the bpmp
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*/
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void tegra_bpmp_resume(void);
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/**
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* Handler to send a MRQ_* command to the bpmp
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*/
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int32_t tegra_bpmp_send_receive_atomic(int mrq, const void *ob_data, int ob_sz,
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void *ib_data, int ib_sz);
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#endif /* BPMP_H */
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