kernel.h

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// Copyright 2024 LLVM-MOS Project
// Licensed under the Apache License, Version 2.0 with LLVM Exceptions.
// See https://github.com/llvm-mos/llvm-mos-sdk/blob/main/LICENSE for license
// information.
 
#ifndef _KERNEL_H
#define _KERNEL_H
 
#include <neo6502.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define KWriteCharacterInline(c) \
    __attribute__((leaf)) asm volatile("jsr 0xFFF5\n.byte %0\n" : : "i"(c) : "p")
 
__attribute__((leaf))
static inline void KReadLine(char *s) {
    uint8_t sl = (uint16_t) s;
    uint8_t sh = ((uint16_t) s) >> 8;
    __attribute__((leaf)) asm volatile("jsr 0xFFEB" : : "x"(sl), "y"(sh) : "p");
}
 
__attribute__((leaf))
static inline char KReadCharacter(void) {
    char c;
    __attribute__((leaf)) asm volatile("jsr 0xFFEE" : "=a"(c) : : "p");
    return c;
}
 
__attribute__((leaf))
static inline void KWriteCharacter(char c) {
    __attribute__((leaf)) asm volatile("jsr 0xFFF1" : : "a"(c) : "p");
}
 
__attribute__((leaf))
static inline void KWaitMessage(void) {
    __attribute__((leaf)) asm volatile("jsr 0xFFF4" : : : "p");
}
 
#define KSendMessage(group, function) \
    __attribute__((leaf)) asm volatile("jsr 0xFFF7\n.byte %0, %1\n" : : "i"(group), "i"(function) : "p")
 
#define KSendMessageSync(group, function) \
    KSendMessage(group, function); \
    KWaitMessage()
 
#ifdef __cplusplus
}
#endif
 
#endif