2  * SPDX-License-Identifier: Apache-2.0
19  * current SOF ipc3/4 layout, which means that:
21  * + Buffer addresses are 4k-aligned (this is a hardware requirement)
41  * whether this is required, and the SOF code that will be using this
42  * is externally synchronized already.
50 		return -ENODEV;  in send()
52 	const struct mem_win_config *mw0_config = mw0->config;  in send()
54 			(void *)((uint32_t)mw0_config->mem_base  in send()
58 		return -EBUSY;  in send()
62 		return -EMSGSIZE;  in send()
67 		return -EINVAL;  in send()
72 	/* Protocol variant (used by SOF "ipc4"): store the first word  in send()
78 		size -= 4;  in send()
88 	 * interrupt context, and it's not clear to me that SOF would  in send()
92 	if (ret == -EBUSY && wait) {  in send()
106 	struct ipm_cavs_host_data *devdata = ipmdev->data;  in ipc_handler()
110 		return -ENODEV;  in ipc_handler()
112 	const struct mem_win_config *mw1_config = mw1->config;  in ipc_handler()
113 	uint32_t *msg = sys_cache_uncached_ptr_get((void *)mw1_config->mem_base);  in ipc_handler()
122 		msg = &msg[-1];  in ipc_handler()
126 	if (devdata->enabled && (devdata->callback != NULL)) {  in ipc_handler()
127 		devdata->callback(ipmdev, devdata->user_data,  in ipc_handler()
142 	/* 30 user-writable bits in cAVS IDR register */  in max_id_val_get()
150 	struct ipm_cavs_host_data *data = port->data;  in register_callback()
152 	data->callback = cb;  in register_callback()
153 	data->user_data = user_data;  in register_callback()
165 	struct ipm_cavs_host_data *data = ipmdev->data;  in set_enabled()
167 	data->enabled = enable;  in set_enabled()
178 	struct ipm_cavs_host_data *data = dev->data;  in init()
183 		return -ENODEV;  in init()
185 	const struct mem_win_config *mw1_config = mw1->config;  in init()
186 	/* Initialize hardware SRAM window.  SOF will give the host 8k  in init()
191 	sys_write32(ROUND_UP(MAX_MSG, 8) | 0x7, DMWLO(mw1_config->base_addr));  in init()
192 	sys_write32((mw1_config->mem_base | ADSP_DMWBA_ENABLE), DMWBA(mw1_config->base_addr));  in init()
196 	data->enabled = true;  in init()