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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Defines APIs that allow an OS to interact with UEFI firmware to query
- * information about the boot hart ID.
- *
- * Copyright (c) 2022, Ventana Micro Systems Inc
- */
- #define LOG_CATEGORY LOGC_EFI
- #include <common.h>
- #include <efi_loader.h>
- #include <efi_variable.h>
- #include <log.h>
- #include <asm/global_data.h>
- #include <efi_riscv.h>
- DECLARE_GLOBAL_DATA_PTR;
- static const efi_guid_t efi_guid_riscv_boot_protocol = RISCV_EFI_BOOT_PROTOCOL_GUID;
- /**
- * efi_riscv_get_boot_hartid() - return boot hart ID
- * @this: RISCV_EFI_BOOT_PROTOCOL instance
- * @boot_hartid: caller allocated memory to return boot hart id
- * Return: status code
- */
- static efi_status_t EFIAPI
- efi_riscv_get_boot_hartid(struct riscv_efi_boot_protocol *this,
- efi_uintn_t *boot_hartid)
- {
- EFI_ENTRY("%p, %p", this, boot_hartid);
- if (this != &riscv_efi_boot_prot || !boot_hartid)
- return EFI_INVALID_PARAMETER;
- *boot_hartid = gd->arch.boot_hart;
- return EFI_EXIT(EFI_SUCCESS);
- }
- struct riscv_efi_boot_protocol riscv_efi_boot_prot = {
- .revision = RISCV_EFI_BOOT_PROTOCOL_REVISION,
- .get_boot_hartid = efi_riscv_get_boot_hartid
- };
- /**
- * efi_riscv_register() - register RISCV_EFI_BOOT_PROTOCOL
- *
- * Return: status code
- */
- efi_status_t efi_riscv_register(void)
- {
- efi_status_t ret = EFI_SUCCESS;
- ret = efi_add_protocol(efi_root, &efi_guid_riscv_boot_protocol,
- (void *)&riscv_efi_boot_prot);
- if (ret != EFI_SUCCESS)
- log_err("Cannot install RISCV_EFI_BOOT_PROTOCOL\n");
- return ret;
- }
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