shithub: rgbds

ref: 797f8bc3a2be6ddec3497496e9989ab66d21800e
dir: /include/linkdefs.h/

/*
 * This file is part of RGBDS.
 *
 * Copyright (c) 1997-2018, Carsten Sorensen and RGBDS contributors.
 *
 * SPDX-License-Identifier: MIT
 */

#ifndef RGBDS_LINKDEFS_H
#define RGBDS_LINKDEFS_H

#include <assert.h>
#include <stdbool.h>
#include <stdint.h>

#define RGBDS_OBJECT_VERSION_STRING "RGB9"
#define RGBDS_OBJECT_REV 9U

enum AssertionType {
	ASSERT_WARN,
	ASSERT_ERROR,
	ASSERT_FATAL
};

enum RPNCommand {
	RPN_ADD			= 0x00,
	RPN_SUB			= 0x01,
	RPN_MUL			= 0x02,
	RPN_DIV			= 0x03,
	RPN_MOD			= 0x04,
	RPN_UNSUB		= 0x05, // FIXME: should be renamed to "NEG" for consistency
	RPN_EXP			= 0x06,

	RPN_OR			= 0x10,
	RPN_AND			= 0x11,
	RPN_XOR			= 0x12,
	RPN_UNNOT		= 0x13, // FIXME: should be renamed to "NOT" for consistency

	RPN_LOGAND		= 0x21,
	RPN_LOGOR		= 0x22,
	RPN_LOGUNNOT		= 0x23, // FIXME: should be renamed to "LOGNOT" for consistency

	RPN_LOGEQ		= 0x30,
	RPN_LOGNE		= 0x31,
	RPN_LOGGT		= 0x32,
	RPN_LOGLT		= 0x33,
	RPN_LOGGE		= 0x34,
	RPN_LOGLE		= 0x35,

	RPN_SHL			= 0x40,
	RPN_SHR			= 0x41,
	RPN_USHR		= 0x42,

	RPN_BANK_SYM		= 0x50,
	RPN_BANK_SECT		= 0x51,
	RPN_BANK_SELF		= 0x52,
	RPN_SIZEOF_SECT		= 0x53,
	RPN_STARTOF_SECT	= 0x54,

	RPN_HRAM		= 0x60,
	RPN_RST			= 0x61,

	RPN_CONST		= 0x80,
	RPN_SYM			= 0x81
};

enum SectionType {
	SECTTYPE_WRAM0,
	SECTTYPE_VRAM,
	SECTTYPE_ROMX,
	SECTTYPE_ROM0,
	SECTTYPE_HRAM,
	SECTTYPE_WRAMX,
	SECTTYPE_SRAM,
	SECTTYPE_OAM,

	// In RGBLINK, this is used for "indeterminate" sections; this is primarily for SDCC
	// areas, which do not carry any section type info and must be told from the linker script
	SECTTYPE_INVALID
};

// Nont-`const` members may be patched in RGBLINK depending on CLI flags
extern struct SectionTypeInfo {
	char const *const name;
	uint16_t const startAddr;
	uint16_t size;
	uint32_t const firstBank;
	uint32_t lastBank;
} sectionTypeInfo[SECTTYPE_INVALID];

/*
 * Tells whether a section has data in its object file definition,
 * depending on type.
 * @param type The section's type
 * @return `true` if the section's definition includes data
 */
static inline bool sect_HasData(enum SectionType type)
{
	assert(type != SECTTYPE_INVALID);
	return type == SECTTYPE_ROM0 || type == SECTTYPE_ROMX;
}

/*
 * Computes a memory region's end address (last byte), eg. 0x7FFF
 * @return The address of the last byte in that memory region
 */
static inline uint16_t endaddr(enum SectionType type)
{
	return sectionTypeInfo[type].startAddr + sectionTypeInfo[type].size - 1;
}

/*
 * Computes a memory region's number of banks
 * @return The number of banks, 1 for regions without banking
 */
static inline uint32_t nbbanks(enum SectionType type)
{
	return sectionTypeInfo[type].lastBank - sectionTypeInfo[type].firstBank + 1;
}

enum SectionModifier {
	SECTION_NORMAL,
	SECTION_UNION,
	SECTION_FRAGMENT
};

extern char const * const sectionModNames[];

enum ExportLevel {
	SYMTYPE_LOCAL,
	SYMTYPE_IMPORT,
	SYMTYPE_EXPORT
};

enum PatchType {
	PATCHTYPE_BYTE,
	PATCHTYPE_WORD,
	PATCHTYPE_LONG,
	PATCHTYPE_JR,

	PATCHTYPE_INVALID
};

#endif // RGBDS_LINKDEFS_H