config.h

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/*
 * Copyright (c) 2023 Adrian "asie" Siekierka
 *
 * 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 _PCE_CONFIG_H_
#define _PCE_CONFIG_H_
 
#include <stdbool.h>
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define __PCE_RAM_BANK_DECLARE(id, offset, size)                               \
  asm(".global __ram_bank" #id "\n.global __ram_bank" #id                      \
      "_size\n.equ __ram_bank" #id ", ((" #offset                              \
      ") << 13)\n.equ __ram_bank" #id "_size, ((" #size ") << 13)\n")
 
#define __PCE_RAM_BANK_USE(id, offset)                                         \
  static inline void pce_ram_bank##id##_map(void) {                            \
    __attribute__((leaf)) asm volatile("lda #__ram_bank" #id "_bank\n"         \
                                       "tam #(1 << " #offset ")\n"             \
                                       :                                       \
                                       :                                       \
                                       : "a", "p");                            \
  }
 
#define __PCE_RAM_BANK_CALLBACK_DECLARE(id, offset)                            \
  __attribute__((                                                              \
      leaf, callback(1), noinline,                                             \
      section("text.pce_ram_bank" #id                                          \
              "_call"))) void pce_ram_bank##id##_call(void (*method)(void)) {  \
    pce_bank##offset##_size1_push();                                           \
    pce_ram_bank##id##_map();                                                  \
    method();                                                                  \
    pce_bank##offset##_size1_pop();                                            \
  }
 
#define __PCE_RAM_BANK_CALLBACK_USE(id)                                        \
  __attribute__((leaf, callback(1))) void pce_ram_bank##id##_call(             \
      void (*method)(void))
 
#ifdef PCE_CONFIG_IMPLEMENTATION
#define PCE_RAM_BANK_AT(id, offset)                                            \
  __PCE_RAM_BANK_DECLARE(id, offset, 1);                                       \
  __PCE_RAM_BANK_USE(id, offset)                                               \
  __PCE_RAM_BANK_CALLBACK_DECLARE(id, offset)
#define PCE_CDB_USE_PSG_DRIVER(value)                                          \
  asm(".global __pce_cdb_use_psg\n.equ __pce_cdb_use_psg, " #value "\n")
#define PCE_CDB_USE_GRAPHICS_DRIVER(value)                                     \
  asm(".global __pce_cdb_use_graphics\n.equ __pce_cdb_use_graphics, " #value   \
      "\n")
#else
 
#define PCE_RAM_BANK_AT(id, offset)                                            \
  __PCE_RAM_BANK_USE(id, offset)                                               \
  __PCE_RAM_BANK_CALLBACK_USE(id)
 
#define PCE_CDB_USE_PSG_DRIVER(value)
 
#define PCE_CDB_USE_GRAPHICS_DRIVER(value)
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif /* _PCE_CONFIG_H_ */