diff options
Diffstat (limited to 'board/kukui_scp/isp_p2_srv.c')
-rwxr-xr-x | board/kukui_scp/isp_p2_srv.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/board/kukui_scp/isp_p2_srv.c b/board/kukui_scp/isp_p2_srv.c new file mode 100755 index 0000000000..5acb81ae0f --- /dev/null +++ b/board/kukui_scp/isp_p2_srv.c @@ -0,0 +1,80 @@ +/* Copyright 2018 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "isp_p2_srv.h" +#include "chip/mt_scp/ipi_chip.h" +#include "chip/mt_scp/registers.h" +#include "queue_policies.h" +#include "console.h" +#include "hooks.h" +#include "task.h" +#include "util.h" +#include "queue.h" + +#define CPRINTS(format, args...) cprints(CC_IPI, format, ##args) + +/* Forwad declaration. */ +static struct consumer const event_dip_consumer; +static void event_dip_written(struct consumer const *consumer, size_t count); + +static struct queue const event_dip_queue = QUEUE_DIRECT(4, + struct dip_msg_service, null_producer, event_dip_consumer); + +static struct consumer const event_dip_consumer = { + .queue = &event_dip_queue, + .ops = &((struct consumer_ops const) { + .written = event_dip_written, + }), +}; + +/* Stub functions only provided by private overlays. */ +#ifndef HAVE_PRIVATE_MT8183 +void dip_msg_handler(void *data) {} +#endif + +static void event_dip_written(struct consumer const *consumer, size_t count) +{ + task_wake(TASK_ID_DIP_SERVICE); +} + +static void dip_scp_ipi_handler(int id, void *data, uint32_t len) +{ + struct dip_msg_service rsv_msg; + + if (!len) + return; + rsv_msg.id = id; + memcpy(rsv_msg.msg, data, MIN(len, sizeof(rsv_msg.msg))); + + /* + * If there is no other IPI handler touch this queue, we don't need to + * interrupt_disable() or task_disable_irq(). + */ + if (!queue_add_unit(&event_dip_queue, &rsv_msg)) + CPRINTS("Could not send dip %d to the queue.", id); +} +DECLARE_IPI(IPI_DIP, dip_scp_ipi_handler, 0); + +/* This function renames from dip_service_entry. */ +void dip_service_task(void *u) +{ + struct dip_msg_service rsv_msg; + size_t size; + + while (1) { + /* + * Queue unit is added in IPI handler, which is in ISR context. + * Disable IRQ to prevent a clobbered queue. + */ + ipi_disable_irq(SCP_IRQ_IPC0); + size = queue_remove_unit(&event_dip_queue, &rsv_msg); + ipi_enable_irq(SCP_IRQ_IPC0); + + if (!size) + task_wait_event(-1); + else + dip_msg_handler(&rsv_msg); + } +} |