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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2019 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- */
- #ifndef __SBI_SCRATCH_H__
- #define __SBI_SCRATCH_H__
- #include <sbi/riscv_asm.h>
- /* clang-format off */
- /** Offset of fw_start member in sbi_scratch */
- #define SBI_SCRATCH_FW_START_OFFSET (0 * __SIZEOF_POINTER__)
- /** Offset of fw_size member in sbi_scratch */
- #define SBI_SCRATCH_FW_SIZE_OFFSET (1 * __SIZEOF_POINTER__)
- /** Offset of next_arg1 member in sbi_scratch */
- #define SBI_SCRATCH_NEXT_ARG1_OFFSET (2 * __SIZEOF_POINTER__)
- /** Offset of next_addr member in sbi_scratch */
- #define SBI_SCRATCH_NEXT_ADDR_OFFSET (3 * __SIZEOF_POINTER__)
- /** Offset of next_mode member in sbi_scratch */
- #define SBI_SCRATCH_NEXT_MODE_OFFSET (4 * __SIZEOF_POINTER__)
- /** Offset of warmboot_addr member in sbi_scratch */
- #define SBI_SCRATCH_WARMBOOT_ADDR_OFFSET (5 * __SIZEOF_POINTER__)
- /** Offset of platform_addr member in sbi_scratch */
- #define SBI_SCRATCH_PLATFORM_ADDR_OFFSET (6 * __SIZEOF_POINTER__)
- /** Offset of hartid_to_scratch member in sbi_scratch */
- #define SBI_SCRATCH_HARTID_TO_SCRATCH_OFFSET (7 * __SIZEOF_POINTER__)
- /** Offset of tmp0 member in sbi_scratch */
- #define SBI_SCRATCH_TMP0_OFFSET (8 * __SIZEOF_POINTER__)
- /** Offset of options member in sbi_scratch */
- #define SBI_SCRATCH_OPTIONS_OFFSET (9 * __SIZEOF_POINTER__)
- /** sbi_ipi_data is located behind sbi_scratch. This struct is not packed. */
- /** Offset of ipi_type in sbi_ipi_data */
- #define SBI_IPI_DATA_IPI_TYPE_OFFSET (15 * __SIZEOF_POINTER__)
- #define SBI_SCRATCH_TLB_QUEUE_HEAD_OFFSET (16 * __SIZEOF_POINTER__)
- #define SBI_SCRATCH_TLB_QUEUE_MEM_OFFSET (SBI_SCRATCH_TLB_QUEUE_HEAD_OFFSET + SBI_TLB_INFO_SIZE)
- /** Maximum size of sbi_scratch and sbi_ipi_data */
- #define SBI_SCRATCH_SIZE (64 * __SIZEOF_POINTER__)
- /* clang-format on */
- #ifndef __ASSEMBLY__
- #include <sbi/sbi_types.h>
- #include <sbi/sbi_ipi.h>
- /** Representation of per-HART scratch space */
- struct sbi_scratch {
- /** Start (or base) address of firmware linked to OpenSBI library */
- unsigned long fw_start;
- /** Size (in bytes) of firmware linked to OpenSBI library */
- unsigned long fw_size;
- /** Arg1 (or 'a1' register) of next booting stage for this HART */
- unsigned long next_arg1;
- /** Address of next booting stage for this HART */
- unsigned long next_addr;
- /** Priviledge mode of next booting stage for this HART */
- unsigned long next_mode;
- /** Warm boot entry point address for this HART */
- unsigned long warmboot_addr;
- /** Address of sbi_platform */
- unsigned long platform_addr;
- /** Address of HART ID to sbi_scratch conversion function */
- unsigned long hartid_to_scratch;
- /** Temporary storage */
- unsigned long tmp0;
- /** Options for OpenSBI library */
- unsigned long options;
- } __packed;
- /** Possible options for OpenSBI library */
- enum sbi_scratch_options {
- /** Disable prints during boot */
- SBI_SCRATCH_NO_BOOT_PRINTS = (1 << 0),
- };
- /** Get pointer to sbi_scratch for current HART */
- #define sbi_scratch_thishart_ptr() \
- ((struct sbi_scratch *)csr_read(CSR_MSCRATCH))
- /** Get Arg1 of next booting stage for current HART */
- #define sbi_scratch_thishart_arg1_ptr() \
- ((void *)(sbi_scratch_thishart_ptr()->next_arg1))
- /** Get pointer to sbi_ipi_data from sbi_scratch */
- #define sbi_ipi_data_ptr(scratch) \
- ((struct sbi_ipi_data *)(void *)scratch + SBI_IPI_DATA_IPI_TYPE_OFFSET)
- /** Get pointer to tlb flush info fifo header from sbi_scratch */
- #define sbi_tlb_fifo_head_ptr(scratch) \
- ((struct sbi_fifo *)(void *)scratch + SBI_SCRATCH_TLB_QUEUE_HEAD_OFFSET)
- /** Get pointer to tlb flush info fifo queue address from sbi_scratch */
- #define sbi_tlb_fifo_mem_ptr(scratch) \
- (void *)((void *)scratch + SBI_SCRATCH_TLB_QUEUE_MEM_OFFSET)
- #endif
- #endif
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