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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _MCALL_H
#define _MCALL_H
// NOTE: this is the size of struct hls below. A static_assert would be
// nice to have.
#if __riscv_xlen == 64
#define HLS_SIZE 88
#endif
#if __riscv_xlen == 32
#define HLS_SIZE 52
#endif
/* We save 37 registers, currently. */
#define MENTRY_FRAME_SIZE (HLS_SIZE + 37 * __SIZEOF_POINTER__)
#ifndef __ASSEMBLER__
#include <arch/encoding.h>
#include <arch/smp/atomic.h>
#include <stdint.h>
struct sbi_device_message {
unsigned long dev;
unsigned long cmd;
unsigned long data;
unsigned long sbi_private_data;
};
struct blocker {
void *arg;
void (*fn)(void *arg);
atomic_t sync_a;
atomic_t sync_b;
};
struct hls {
struct sbi_device_message *device_request_queue_head;
unsigned long device_request_queue_size;
struct sbi_device_message *device_response_queue_head;
struct sbi_device_message *device_response_queue_tail;
int hart_id;
int ipi_pending;
uint64_t *timecmp;
uint64_t *time;
void *fdt;
struct blocker entry;
};
_Static_assert(
sizeof(struct hls) == HLS_SIZE,
"HLS_SIZE must equal to sizeof(struct hls)");
register uintptr_t current_stack_pointer asm("sp");
#define MACHINE_STACK_TOP() ({ \
(void *)((current_stack_pointer + RISCV_PGSIZE) & -RISCV_PGSIZE); })
// hart-local storage, at top of stack
#define HLS() ((struct hls *)(MACHINE_STACK_TOP() - HLS_SIZE))
#define OTHER_HLS(id) ((struct hls *)((void *)HLS() + RISCV_PGSIZE * ((id) - HLS()->hart_id)))
#define MACHINE_STACK_SIZE RISCV_PGSIZE
// need to call this before launching linux
void hls_init(uint32_t hart_id, void *fdt);
/* This function is used to initialize HLS()->time/HLS()->timecmp */
void mtime_init(void);
/*
* This function needs be implement by SoC code.
* Although the privileged instruction set defines that MSIP will be
* memory-mapped, but does not define how to map. SoC can be implemented as
* a bit, a byte, a word, and so on.
* So we can't provide code that is related to implementation.
*/
void set_msip(int hartid, int val);
#endif // __ASSEMBLER__
#endif
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