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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 The ChromiumOS Authors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _MCALL_H
#define _MCALL_H
// NOTE: this is the size of hls_t below. A static_assert would be
// nice to have.
#define HLS_SIZE 64
/* We save 37 registers, currently. */
#define MENTRY_FRAME_SIZE (HLS_SIZE + 37 * 8)
#ifndef __ASSEMBLER__
#include <arch/encoding.h>
#include <stdint.h>
typedef struct {
unsigned long dev;
unsigned long cmd;
unsigned long data;
unsigned long sbi_private_data;
} sbi_device_message;
typedef struct {
sbi_device_message *device_request_queue_head;
unsigned long device_request_queue_size;
sbi_device_message *device_response_queue_head;
sbi_device_message *device_response_queue_tail;
int hart_id;
int ipi_pending;
uint64_t *timecmp;
uint64_t *time;
} hls_t;
#define MACHINE_STACK_TOP() ({ \
/* coverity[uninit_use] : FALSE */ \
register uintptr_t sp asm ("sp"); \
(void*)((sp + RISCV_PGSIZE) & -RISCV_PGSIZE); })
// hart-local storage, at top of stack
#define HLS() ((hls_t*)(MACHINE_STACK_TOP() - HLS_SIZE))
#define OTHER_HLS(id) ((hls_t*)((void*)HLS() + RISCV_PGSIZE * ((id) - HLS()->hart_id)))
#define MACHINE_STACK_SIZE RISCV_PGSIZE
void hls_init(uint32_t hart_id); // need to call this before launching linux
/* This function is used to initialize HLS()->time/HLS()->timecmp */
void mtime_init(void);
#endif // __ASSEMBLER__
#endif
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