diff options
Diffstat (limited to 'drivers/arm/css/scmi/vendor')
-rw-r--r-- | drivers/arm/css/scmi/vendor/scmi_sq.c | 62 | ||||
-rw-r--r-- | drivers/arm/css/scmi/vendor/scmi_sq.h | 25 |
2 files changed, 87 insertions, 0 deletions
diff --git a/drivers/arm/css/scmi/vendor/scmi_sq.c b/drivers/arm/css/scmi/vendor/scmi_sq.c new file mode 100644 index 0000000..f185424 --- /dev/null +++ b/drivers/arm/css/scmi/vendor/scmi_sq.c @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> + +#include <arch_helpers.h> +#include <common/debug.h> +#include <drivers/arm/css/scmi.h> + +#include "scmi_private.h" +#include "scmi_sq.h" + +#include <sq_common.h> + +/* SCMI messge ID to get the available DRAM region */ +#define SCMI_VENDOR_EXT_MEMINFO_GET_MSG 0x3 + +#define SCMI_VENDOR_EXT_MEMINFO_GET_MSG_LEN 4 + +/* + * API to get the available DRAM region + */ +int scmi_get_draminfo(void *p, struct draminfo *info) +{ + mailbox_mem_t *mbx_mem; + int token = 0, ret; + scmi_channel_t *ch = (scmi_channel_t *)p; + struct dram_info_resp response; + + validate_scmi_channel(ch); + + scmi_get_channel(ch); + + mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem); + mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_SYS_VENDOR_EXT_PROTO_ID, + SCMI_VENDOR_EXT_MEMINFO_GET_MSG, token); + mbx_mem->len = SCMI_VENDOR_EXT_MEMINFO_GET_MSG_LEN; + mbx_mem->flags = SCMI_FLAG_RESP_POLL; + + scmi_send_sync_command(ch); + + /* + * Ensure that any read to the SCPI payload area is done after reading + * the MHU register. If these 2 reads were reordered then the CPU would + * read invalid payload data + */ + dmbld(); + + /* Get the return values */ + SCMI_PAYLOAD_RET_VAL1(mbx_mem->payload, ret); + + memcpy(&response, (void *)mbx_mem->payload, sizeof(response)); + + scmi_put_channel(ch); + + *info = response.info; + + return ret; +} diff --git a/drivers/arm/css/scmi/vendor/scmi_sq.h b/drivers/arm/css/scmi/vendor/scmi_sq.h new file mode 100644 index 0000000..aee1a3a --- /dev/null +++ b/drivers/arm/css/scmi/vendor/scmi_sq.h @@ -0,0 +1,25 @@ +/* + * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef SCMI_SQ_H +#define SCMI_SQ_H + +#include <stddef.h> +#include <stdint.h> + +#include <sq_common.h> + +/* Structure to represent available DRAM region */ +struct dram_info_resp { + int status; + int reserved; + struct draminfo info; +}; + +/* API to get the available DRAM region */ +int scmi_get_draminfo(void *p, struct draminfo *info); + +#endif /* SCMI_SQ_H */ |