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alif/mpmetalport: Use MHU to notify remote cores.

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Unlike HWSEM, the MHU IRQ can wake up cores from low-power modes, making it
better suited for notifying remote cores.  Note that no special function is
required to wake up a remote core—the act of sending a message alone will
notify it.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
This commit is contained in:
iabdalkader
2025-02-15 14:00:42 +01:00
committed by Damien George
parent b9e5f1ffba
commit 182b5f3a12
2 changed files with 7 additions and 38 deletions
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31
ports/alif/mpmetalport.c
View File

@@ -27,8 +27,6 @@
*/
#include ALIF_CMSIS_H
#include "hwsem.h"
#include "py/mperrno.h"
#include "py/mphal.h"
@@ -36,18 +34,14 @@
#include "metal/utilities.h"
#include "metal/device.h"
#include "se_services.h"
struct metal_state _metal;
static mp_sched_node_t rproc_notify_node;
int metal_sys_init(const struct metal_init_params *params) {
metal_unused(params);
// Reset the hardware semaphore.
hwsem_reset(METAL_HSEM_DEVICE);
#if MICROPY_PY_OPENAMP_HOST
hwsem_reset(METAL_HSEM_REMOTE);
#endif
// If cache management is not enabled, configure the MPU to disable
// caching for the entire Open-AMP shared memory region.
#ifndef VIRTIO_USE_DCACHE
@@ -59,18 +53,10 @@ int metal_sys_init(const struct metal_init_params *params) {
#endif
metal_bus_register(&metal_generic_bus);
// Enable the hardware semaphore IRQ.
NVIC_ClearPendingIRQ(METAL_HSEM_IRQn);
NVIC_SetPriority(METAL_HSEM_IRQn, IRQ_PRI_HWSEM);
NVIC_EnableIRQ(METAL_HSEM_IRQn);
return 0;
}
void metal_sys_finish(void) {
NVIC_DisableIRQ(METAL_HSEM_IRQn);
NVIC_ClearPendingIRQ(METAL_HSEM_IRQn);
hwsem_reset(METAL_HSEM_DEVICE);
metal_bus_unregister(&metal_generic_bus);
}
@@ -99,15 +85,12 @@ void metal_machine_cache_invalidate(void *addr, unsigned int len) {
}
int metal_rproc_notify(void *priv, uint32_t id) {
// Release the HW semaphore to notify the other core.
hwsem_release(METAL_HSEM_REMOTE, HWSEM_MASTERID);
// Notify the remote core.
se_services_notify();
return 0;
}
void METAL_HSEM_IRQ_HANDLER(void) {
// Schedule the node only if the other core released the Semaphore.
if (METAL_HSEM_DEVICE->HWSEM_REL_REG == 0) {
mp_sched_schedule_node(&rproc_notify_node, openamp_remoteproc_notified);
}
hwsem_request(METAL_HSEM_DEVICE, METAL_HSEM_REMOTE_ID);
void metal_rproc_notified(void) {
// The remote core notified this core.
mp_sched_schedule_node(&rproc_notify_node, openamp_remoteproc_notified);
}

14
ports/alif/mpmetalport.h
View File

@@ -38,20 +38,6 @@
#define METAL_MAX_DEVICE_REGIONS 2
#if MICROPY_PY_OPENAMP_HOST
#define METAL_HSEM_DEVICE ((HWSEM_Type *)HWSEM14_BASE)
#define METAL_HSEM_REMOTE ((HWSEM_Type *)HWSEM15_BASE)
#define METAL_HSEM_REMOTE_ID (0x410FD222U)
#define METAL_HSEM_IRQn HWSEM_IRQ14_IRQn
#define METAL_HSEM_IRQ_HANDLER HWSEM_IRQ14Handler
#else
#define METAL_HSEM_DEVICE ((HWSEM_Type *)HWSEM15_BASE)
#define METAL_HSEM_REMOTE ((HWSEM_Type *)HWSEM14_BASE)
#define METAL_HSEM_REMOTE_ID (0x410FD221U)
#define METAL_HSEM_IRQn HWSEM_IRQ15_IRQn
#define METAL_HSEM_IRQ_HANDLER HWSEM_IRQ15Handler
#endif
// Set to 1 to enable log output.
#define METAL_LOG_HANDLER_ENABLE 0