/**
 * @file portmacro.h
 * @brief RISC-V RV32 specific macros
 */

#ifndef PORTMACRO_H
#define PORTMACRO_H

#include <stdint.h>

/* Data Types */
typedef uint32_t port_stack_type_t;
typedef uint32_t port_base_type_t;

/* Architecture Constants */
#define PORT_STACK_GROWTH_DIRECTION    (-1)
#define PORT_BYTE_ALIGNMENT            16

/* Critical Section Macros */
#define portENTER_CRITICAL()    __asm volatile("csrci mstatus, 0x8")
#define portEXIT_CRITICAL()     __asm volatile("csrsi mstatus, 0x8")

/* Interrupt Control */
#define portENABLE_INTERRUPTS()  __asm volatile("csrsi mstatus, 0x8")
#define portDISABLE_INTERRUPTS() __asm volatile("csrci mstatus, 0x8")

/* Context Switch */
#define portYIELD()             __asm volatile("li t0, 0x8\ncsrs mip, t0")
#define portYIELD_FROM_ISR()    __asm volatile("li t0, 0x8\ncsrs mip, t0")

/* Memory Barriers */
#define portMEMORY_BARRIER()    __asm volatile("fence")
#define portSYNC_BARRIER()      __asm volatile("fence")
#define portINSTRUCTION_BARRIER() __asm volatile("fence.i")

/* NOP */
#define portNOP()               __asm volatile("nop")

#endif /* PORTMACRO_H */