| /* |
| * Copyright (c) 2018, NXP |
| * Copyright (c) 2018, Nordic Semiconductor ASA |
| * Copyright (c) 2018, Linaro Limited |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr.h> |
| #include <drivers/ipm.h> |
| #include <sys/printk.h> |
| #include <device.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <openamp/open_amp.h> |
| #include <metal/device.h> |
| |
| #include "common.h" |
| |
| #define APP_TASK_STACK_SIZE (1024) |
| K_THREAD_STACK_DEFINE(thread_stack, APP_TASK_STACK_SIZE); |
| static struct k_thread thread_data; |
| |
| static struct device *ipm_handle; |
| |
| static metal_phys_addr_t shm_physmap[] = { SHM_START_ADDR }; |
| static struct metal_device shm_device = { |
| .name = SHM_DEVICE_NAME, |
| .bus = NULL, |
| .num_regions = 1, |
| { |
| { |
| .virt = (void *) SHM_START_ADDR, |
| .physmap = shm_physmap, |
| .size = SHM_SIZE, |
| .page_shift = 0xffffffff, |
| .page_mask = 0xffffffff, |
| .mem_flags = 0, |
| .ops = { NULL }, |
| }, |
| }, |
| .node = { NULL }, |
| .irq_num = 0, |
| .irq_info = NULL |
| }; |
| |
| static volatile unsigned int received_data; |
| |
| static struct virtio_vring_info rvrings[2] = { |
| [0] = { |
| .info.align = VRING_ALIGNMENT, |
| }, |
| [1] = { |
| .info.align = VRING_ALIGNMENT, |
| }, |
| }; |
| static struct virtio_device vdev; |
| static struct rpmsg_virtio_device rvdev; |
| static struct metal_io_region *io; |
| static struct virtqueue *vq[2]; |
| |
| static unsigned char virtio_get_status(struct virtio_device *vdev) |
| { |
| return sys_read8(VDEV_STATUS_ADDR); |
| } |
| |
| static u32_t virtio_get_features(struct virtio_device *vdev) |
| { |
| return 1 << VIRTIO_RPMSG_F_NS; |
| } |
| |
| static void virtio_notify(struct virtqueue *vq) |
| { |
| u32_t dummy_data = 0x00110011; /* Some data must be provided */ |
| |
| ipm_send(ipm_handle, 0, 0, &dummy_data, sizeof(dummy_data)); |
| } |
| |
| struct virtio_dispatch dispatch = { |
| .get_status = virtio_get_status, |
| .get_features = virtio_get_features, |
| .notify = virtio_notify, |
| }; |
| |
| static K_SEM_DEFINE(data_sem, 0, 1); |
| static K_SEM_DEFINE(data_rx_sem, 0, 1); |
| |
| static void platform_ipm_callback(void *context, u32_t id, volatile void *data) |
| { |
| k_sem_give(&data_sem); |
| } |
| |
| int endpoint_cb(struct rpmsg_endpoint *ept, void *data, |
| size_t len, u32_t src, void *priv) |
| { |
| received_data = *((unsigned int *) data); |
| |
| k_sem_give(&data_rx_sem); |
| |
| return RPMSG_SUCCESS; |
| } |
| |
| static K_SEM_DEFINE(ept_sem, 0, 1); |
| |
| struct rpmsg_endpoint my_ept; |
| struct rpmsg_endpoint *ep = &my_ept; |
| |
| static void rpmsg_service_unbind(struct rpmsg_endpoint *ept) |
| { |
| (void)ept; |
| rpmsg_destroy_ept(ep); |
| } |
| |
| static unsigned int receive_message(void) |
| { |
| while (k_sem_take(&data_rx_sem, K_NO_WAIT) != 0) { |
| int status = k_sem_take(&data_sem, K_FOREVER); |
| |
| if (status == 0) { |
| virtqueue_notification(vq[1]); |
| } |
| } |
| return received_data; |
| } |
| |
| static int send_message(unsigned int message) |
| { |
| return rpmsg_send(ep, &message, sizeof(message)); |
| } |
| |
| void app_task(void *arg1, void *arg2, void *arg3) |
| { |
| ARG_UNUSED(arg1); |
| ARG_UNUSED(arg2); |
| ARG_UNUSED(arg3); |
| int status = 0; |
| unsigned int message = 0U; |
| struct metal_device *device; |
| struct rpmsg_device *rdev; |
| struct metal_init_params metal_params = METAL_INIT_DEFAULTS; |
| |
| printk("\r\nOpenAMP[remote] demo started\r\n"); |
| |
| status = metal_init(&metal_params); |
| if (status != 0) { |
| printk("metal_init: failed - error code %d\n", status); |
| return; |
| } |
| |
| status = metal_register_generic_device(&shm_device); |
| if (status != 0) { |
| printk("Couldn't register shared memory device: %d\n", status); |
| return; |
| } |
| |
| status = metal_device_open("generic", SHM_DEVICE_NAME, &device); |
| if (status != 0) { |
| printk("metal_device_open failed: %d\n", status); |
| return; |
| } |
| |
| io = metal_device_io_region(device, 0); |
| if (io == NULL) { |
| printk("metal_device_io_region failed to get region\n"); |
| return; |
| } |
| |
| /* setup IPM */ |
| ipm_handle = device_get_binding("MAILBOX_0"); |
| if (ipm_handle == NULL) { |
| printk("device_get_binding failed to find device\n"); |
| return; |
| } |
| |
| ipm_register_callback(ipm_handle, platform_ipm_callback, NULL); |
| |
| status = ipm_set_enabled(ipm_handle, 1); |
| if (status != 0) { |
| printk("ipm_set_enabled failed\n"); |
| return; |
| } |
| |
| /* setup vdev */ |
| vq[0] = virtqueue_allocate(VRING_SIZE); |
| if (vq[0] == NULL) { |
| printk("virtqueue_allocate failed to alloc vq[0]\n"); |
| return; |
| } |
| vq[1] = virtqueue_allocate(VRING_SIZE); |
| if (vq[1] == NULL) { |
| printk("virtqueue_allocate failed to alloc vq[1]\n"); |
| return; |
| } |
| |
| vdev.role = RPMSG_REMOTE; |
| vdev.vrings_num = VRING_COUNT; |
| vdev.func = &dispatch; |
| rvrings[0].io = io; |
| rvrings[0].info.vaddr = (void *)VRING_TX_ADDRESS; |
| rvrings[0].info.num_descs = VRING_SIZE; |
| rvrings[0].info.align = VRING_ALIGNMENT; |
| rvrings[0].vq = vq[0]; |
| |
| rvrings[1].io = io; |
| rvrings[1].info.vaddr = (void *)VRING_RX_ADDRESS; |
| rvrings[1].info.num_descs = VRING_SIZE; |
| rvrings[1].info.align = VRING_ALIGNMENT; |
| rvrings[1].vq = vq[1]; |
| |
| vdev.vrings_info = &rvrings[0]; |
| |
| /* setup rvdev */ |
| status = rpmsg_init_vdev(&rvdev, &vdev, NULL, io, NULL); |
| if (status != 0) { |
| printk("rpmsg_init_vdev failed %d\n", status); |
| return; |
| } |
| |
| rdev = rpmsg_virtio_get_rpmsg_device(&rvdev); |
| |
| status = rpmsg_create_ept(ep, rdev, "k", RPMSG_ADDR_ANY, |
| RPMSG_ADDR_ANY, endpoint_cb, rpmsg_service_unbind); |
| if (status != 0) { |
| printk("rpmsg_create_ept failed %d\n", status); |
| return; |
| } |
| |
| while (message < 99) { |
| message = receive_message(); |
| printk("Remote core received a message: %d\n", message); |
| |
| message++; |
| status = send_message(message); |
| if (status < 0) { |
| printk("send_message(%d) failed with status %d\n", |
| message, status); |
| goto _cleanup; |
| } |
| } |
| |
| _cleanup: |
| rpmsg_deinit_vdev(&rvdev); |
| metal_finish(); |
| |
| printk("OpenAMP demo ended.\n"); |
| } |
| |
| void main(void) |
| { |
| printk("Starting application thread!\n"); |
| k_thread_create(&thread_data, thread_stack, APP_TASK_STACK_SIZE, |
| (k_thread_entry_t)app_task, |
| NULL, NULL, NULL, K_PRIO_COOP(7), 0, 0); |
| } |