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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>
/** 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__)
/** 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_INFO_OFFSET (16 * __SIZEOF_POINTER__)
/** Maximum size of sbi_scratch and sbi_ipi_data */
#define SBI_SCRATCH_SIZE (32 * __SIZEOF_POINTER__)
#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;
} __packed;
/** 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 from sbi_scratch */
#define sbi_tlb_info_ptr(scratch) \
((struct sbi_tlb_info *)(void*)scratch + SBI_SCRATCH_TLB_INFO_OFFSET)
#endif
#endif
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