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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)
#define MCALL_HART_ID 0
#define MCALL_NUM_HARTS 1
#define MCALL_QUERY_MEMORY 2
#define MCALL_CONSOLE_PUTCHAR 3
#define MCALL_CONSOLE_GETCHAR 4
#define MCALL_SEND_IPI 6
#define MCALL_CLEAR_IPI 7
#define MCALL_SHUTDOWN 8
#define MCALL_SET_TIMER 9
#define MCALL_REMOTE_SFENCE_VM 10
#define MCALL_REMOTE_FENCE_I 11
#define MCALL_CONFIG_STRING_BASE 12
#define MCALL_CONFIG_STRING_SIZE 13
#ifndef __ASSEMBLER__
#include <arch/encoding.h>
#include <atomic.h>
#include <stdint.h>
typedef struct {
unsigned long base;
unsigned long size;
unsigned long node_id;
} memory_block_info;
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() ({ \
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
uintptr_t mcall_query_memory(uintptr_t id, memory_block_info *p);
uintptr_t mcall_console_putchar(uint8_t ch);
uintptr_t mcall_dev_req(sbi_device_message *m);
uintptr_t mcall_dev_resp(void);
uintptr_t mcall_set_timer(unsigned long long when);
uintptr_t mcall_clear_ipi(void);
uintptr_t mcall_send_ipi(uintptr_t recipient);
uintptr_t mcall_shutdown(void);
void hls_init(uint32_t hart_id); // need to call this before launching linux
#endif // __ASSEMBLER__
#endif
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