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https://github.com/ARM-software/arm-trusted-firmware.git
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b67d20297f
Enable the SCMI protocol support in SynQuacer platform. Aside from power domain, system power and apcore management protocol, this commit adds the vendor specific protocol(0x80). This vendor specific protocol is used to get the dram mapping information from SCP. Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
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* Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <drivers/arm/css/scmi.h>
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#include "scmi_private.h"
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#include "scmi_sq.h"
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#include <sq_common.h>
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/* SCMI messge ID to get the available DRAM region */
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#define SCMI_VENDOR_EXT_MEMINFO_GET_MSG 0x3
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/*
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* API to get the available DRAM region
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*/
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int scmi_get_draminfo(void *p, struct draminfo *info)
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{
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mailbox_mem_t *mbx_mem;
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int token = 0, ret;
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scmi_channel_t *ch = (scmi_channel_t *)p;
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struct dram_info_resp response;
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validate_scmi_channel(ch);
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scmi_get_channel(ch);
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mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
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mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_SYS_VENDOR_EXT_PROTO_ID,
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SCMI_VENDOR_EXT_MEMINFO_GET_MSG, token);
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mbx_mem->len = 8;
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mbx_mem->flags = SCMI_FLAG_RESP_POLL;
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scmi_send_sync_command(ch);
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/*
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* Ensure that any read to the SCPI payload area is done after reading
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* the MHU register. If these 2 reads were reordered then the CPU would
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* read invalid payload data
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*/
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dmbld();
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/* Get the return values */
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SCMI_PAYLOAD_RET_VAL1(mbx_mem->payload, ret);
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memcpy(&response, (void *)mbx_mem->payload, sizeof(response));
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scmi_put_channel(ch);
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*info = response.info;
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return ret;
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}
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