arm-trusted-firmware/plat/arm/board/corstone700/corstone700_plat.c

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/*
Corstone700: add support for mhuv2 in arm TF-A Note: This patch implements in-band messaging protocol only. ARM has launched a next version of MHU i.e. MHUv2 with its latest subsystems. The main change is that the MHUv2 is now a distributed IP with different peripheral views (registers) for the sender and receiver. Another main difference is that MHUv1 duplex channels are now split into simplex/half duplex in MHUv2. MHUv2 has a configurable number of communication channels. There is a capability register (MSG_NO_CAP) to find out how many channels are available in a system. The register offsets have also changed for STAT, SET & CLEAR registers from 0x0, 0x8 & 0x10 in MHUv1 to 0x0, 0xC & 0x8 in MHUv2 respectively. 0x0 0x4 0x8 0xC 0x1F ------------------------....----- | STAT | | | SET | | | ------------------------....----- Transmit Channel 0x0 0x4 0x8 0xC 0x1F ------------------------....----- | STAT | | CLR | | | | ------------------------....----- Receive Channel The MHU controller can request the receiver to wake-up and once the request is removed, the receiver may go back to sleep, but the MHU itself does not actively put a receiver to sleep. So, in order to wake-up the receiver when the sender wants to send data, the sender has to set ACCESS_REQUEST register first in order to wake-up receiver, state of which can be detected using ACCESS_READY register. ACCESS_REQUEST has an offset of 0xF88 & ACCESS_READY has an offset of 0xF8C and are accessible only on any sender channel. This patch adds necessary changes in a new file required to support the latest MHUv2 controller. This patch also needs an update in DT binding for ARM MHUv2 as we need a second register base (tx base) which would be used as the send channel base. Change-Id: I1455e08b3d88671a191c558790c503eabe07a8e6 Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
2020-01-29 16:51:42 +00:00
* Copyright (c) 2019-2020, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common/bl_common.h>
Corstone700: add support for mhuv2 in arm TF-A Note: This patch implements in-band messaging protocol only. ARM has launched a next version of MHU i.e. MHUv2 with its latest subsystems. The main change is that the MHUv2 is now a distributed IP with different peripheral views (registers) for the sender and receiver. Another main difference is that MHUv1 duplex channels are now split into simplex/half duplex in MHUv2. MHUv2 has a configurable number of communication channels. There is a capability register (MSG_NO_CAP) to find out how many channels are available in a system. The register offsets have also changed for STAT, SET & CLEAR registers from 0x0, 0x8 & 0x10 in MHUv1 to 0x0, 0xC & 0x8 in MHUv2 respectively. 0x0 0x4 0x8 0xC 0x1F ------------------------....----- | STAT | | | SET | | | ------------------------....----- Transmit Channel 0x0 0x4 0x8 0xC 0x1F ------------------------....----- | STAT | | CLR | | | | ------------------------....----- Receive Channel The MHU controller can request the receiver to wake-up and once the request is removed, the receiver may go back to sleep, but the MHU itself does not actively put a receiver to sleep. So, in order to wake-up the receiver when the sender wants to send data, the sender has to set ACCESS_REQUEST register first in order to wake-up receiver, state of which can be detected using ACCESS_READY register. ACCESS_REQUEST has an offset of 0xF88 & ACCESS_READY has an offset of 0xF8C and are accessible only on any sender channel. This patch adds necessary changes in a new file required to support the latest MHUv2 controller. This patch also needs an update in DT binding for ARM MHUv2 as we need a second register base (tx base) which would be used as the send channel base. Change-Id: I1455e08b3d88671a191c558790c503eabe07a8e6 Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
2020-01-29 16:51:42 +00:00
#include <mhu.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/common/platform.h>
#include <platform_def.h>
/*
* Table of regions to map using the MMU.
* Replace or extend the below regions as required
*/
const mmap_region_t plat_arm_mmap[] = {
ARM_MAP_SHARED_RAM,
ARM_MAP_NS_DRAM1,
CORSTONE700_MAP_DEVICE,
{0}
};
/* Corstone700 only has one always-on power domain and there
* is no power control present
*/
void __init plat_arm_pwrc_setup(void)
{
Corstone700: add support for mhuv2 in arm TF-A Note: This patch implements in-band messaging protocol only. ARM has launched a next version of MHU i.e. MHUv2 with its latest subsystems. The main change is that the MHUv2 is now a distributed IP with different peripheral views (registers) for the sender and receiver. Another main difference is that MHUv1 duplex channels are now split into simplex/half duplex in MHUv2. MHUv2 has a configurable number of communication channels. There is a capability register (MSG_NO_CAP) to find out how many channels are available in a system. The register offsets have also changed for STAT, SET & CLEAR registers from 0x0, 0x8 & 0x10 in MHUv1 to 0x0, 0xC & 0x8 in MHUv2 respectively. 0x0 0x4 0x8 0xC 0x1F ------------------------....----- | STAT | | | SET | | | ------------------------....----- Transmit Channel 0x0 0x4 0x8 0xC 0x1F ------------------------....----- | STAT | | CLR | | | | ------------------------....----- Receive Channel The MHU controller can request the receiver to wake-up and once the request is removed, the receiver may go back to sleep, but the MHU itself does not actively put a receiver to sleep. So, in order to wake-up the receiver when the sender wants to send data, the sender has to set ACCESS_REQUEST register first in order to wake-up receiver, state of which can be detected using ACCESS_READY register. ACCESS_REQUEST has an offset of 0xF88 & ACCESS_READY has an offset of 0xF8C and are accessible only on any sender channel. This patch adds necessary changes in a new file required to support the latest MHUv2 controller. This patch also needs an update in DT binding for ARM MHUv2 as we need a second register base (tx base) which would be used as the send channel base. Change-Id: I1455e08b3d88671a191c558790c503eabe07a8e6 Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
2020-01-29 16:51:42 +00:00
mhu_secure_init();
}
unsigned int plat_get_syscnt_freq2(void)
{
return CORSTONE700_TIMER_BASE_FREQUENCY;
}