mirror of
https://github.com/gbdev/rgbds.git
synced 2025-11-20 18:22:07 +00:00
504 lines
12 KiB
C
504 lines
12 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "extern/err.h"
|
|
#include "link/mylink.h"
|
|
#include "link/main.h"
|
|
#include "link/symbol.h"
|
|
#include "link/assign.h"
|
|
|
|
struct sFreeArea {
|
|
SLONG nOrg;
|
|
SLONG nSize;
|
|
struct sFreeArea *pPrev, *pNext;
|
|
};
|
|
|
|
struct sSectionAttributes {
|
|
const char *name;
|
|
SLONG bank;
|
|
SLONG offset; // bank + offset = bank originally stored in a section struct
|
|
SLONG minBank;
|
|
SLONG bankCount;
|
|
};
|
|
|
|
struct sFreeArea *BankFree[MAXBANKS];
|
|
SLONG MaxAvail[MAXBANKS];
|
|
SLONG MaxBankUsed;
|
|
SLONG MaxWBankUsed;
|
|
SLONG MaxSBankUsed;
|
|
SLONG MaxVBankUsed;
|
|
|
|
const enum eSectionType SECT_MIN = SECT_WRAM0;
|
|
const enum eSectionType SECT_MAX = SECT_SRAM;
|
|
const struct sSectionAttributes SECT_ATTRIBUTES[] = {
|
|
{"WRAM0", BANK_WRAM0, 0, 0, BANK_COUNT_WRAM0},
|
|
{"VRAM", BANK_VRAM, 0, 0, BANK_COUNT_VRAM},
|
|
{"ROMX", BANK_ROMX, -1, 1, BANK_COUNT_ROMX},
|
|
{"ROM0", BANK_ROM0, 0, 0, BANK_COUNT_ROM0},
|
|
{"HRAM", BANK_HRAM, 0, 0, BANK_COUNT_HRAM},
|
|
{"WRAMX", BANK_WRAMX, 0, 0, BANK_COUNT_WRAMX},
|
|
{"SRAM", BANK_SRAM, 0, 0, BANK_COUNT_SRAM}
|
|
};
|
|
|
|
#define DOMAXBANK(x, y) {switch (x) { \
|
|
case SECT_ROMX: DOMAXRBANK(y); break; \
|
|
case SECT_WRAMX: DOMAXWBANK(y); break; \
|
|
case SECT_SRAM: DOMAXSBANK(y); break; \
|
|
case SECT_VRAM: DOMAXVBANK(y); break; \
|
|
default: errx(1, "DOMAXBANK used with invalid parameters"); break; }}
|
|
#define DOMAXRBANK(x) {if( (x)>MaxBankUsed ) MaxBankUsed=(x);}
|
|
#define DOMAXWBANK(x) {if( (x)>MaxWBankUsed ) MaxWBankUsed=(x);}
|
|
#define DOMAXSBANK(x) {if( (x)>MaxSBankUsed ) MaxSBankUsed=(x);}
|
|
#define DOMAXVBANK(x) {if( (x)>MaxVBankUsed ) MaxVBankUsed=(x);}
|
|
|
|
void
|
|
ensureSectionTypeIsValid(enum eSectionType type)
|
|
{
|
|
if (type < SECT_MIN || type > SECT_MAX) {
|
|
errx(1, "(INTERNAL) Invalid section type found.");
|
|
}
|
|
}
|
|
|
|
SLONG
|
|
area_Avail(SLONG bank)
|
|
{
|
|
SLONG r;
|
|
struct sFreeArea *pArea;
|
|
|
|
r = 0;
|
|
pArea = BankFree[bank];
|
|
|
|
while (pArea) {
|
|
r += pArea->nSize;
|
|
pArea = pArea->pNext;
|
|
}
|
|
|
|
return (r);
|
|
}
|
|
|
|
SLONG
|
|
area_AllocAbs(struct sFreeArea ** ppArea, SLONG org, SLONG size)
|
|
{
|
|
struct sFreeArea *pArea;
|
|
|
|
pArea = *ppArea;
|
|
while (pArea) {
|
|
if (org >= pArea->nOrg
|
|
&& (org + size - 1) <= (pArea->nOrg + pArea->nSize - 1)) {
|
|
if (org == pArea->nOrg) {
|
|
pArea->nOrg += size;
|
|
pArea->nSize -= size;
|
|
return 0;
|
|
} else {
|
|
if ((org + size - 1) ==
|
|
(pArea->nOrg + pArea->nSize - 1)) {
|
|
pArea->nSize -= size;
|
|
return 0;
|
|
} else {
|
|
struct sFreeArea *pNewArea;
|
|
|
|
if ((pNewArea =
|
|
malloc(sizeof(struct sFreeArea)))
|
|
!= NULL) {
|
|
*pNewArea = *pArea;
|
|
pNewArea->pPrev = pArea;
|
|
pArea->pNext = pNewArea;
|
|
pArea->nSize =
|
|
org - pArea->nOrg;
|
|
pNewArea->nOrg = org + size;
|
|
pNewArea->nSize -=
|
|
size + pArea->nSize;
|
|
|
|
return 0;
|
|
} else {
|
|
err(1, NULL);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ppArea = &(pArea->pNext);
|
|
pArea = *ppArea;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
SLONG
|
|
area_AllocAbsAnyBank(SLONG org, SLONG size, enum eSectionType type)
|
|
{
|
|
ensureSectionTypeIsValid(type);
|
|
|
|
SLONG startBank = SECT_ATTRIBUTES[type].bank;
|
|
SLONG bankCount = SECT_ATTRIBUTES[type].bankCount;
|
|
|
|
for (int i = 0; i < bankCount; i++) {
|
|
if (area_AllocAbs(&BankFree[startBank + i], org, size) != -1) {
|
|
return startBank + i;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
SLONG
|
|
area_Alloc(struct sFreeArea ** ppArea, SLONG size)
|
|
{
|
|
struct sFreeArea *pArea;
|
|
|
|
pArea = *ppArea;
|
|
while (pArea) {
|
|
if (size <= pArea->nSize) {
|
|
SLONG r;
|
|
|
|
r = pArea->nOrg;
|
|
pArea->nOrg += size;
|
|
pArea->nSize -= size;
|
|
|
|
return (r);
|
|
}
|
|
ppArea = &(pArea->pNext);
|
|
pArea = *ppArea;
|
|
}
|
|
|
|
return (-1);
|
|
}
|
|
|
|
SLONG
|
|
area_AllocAnyBank(SLONG size, enum eSectionType type) {
|
|
ensureSectionTypeIsValid(type);
|
|
|
|
SLONG startBank = SECT_ATTRIBUTES[type].bank;
|
|
SLONG bankCount = SECT_ATTRIBUTES[type].bankCount;
|
|
|
|
for (int i = 0; i < bankCount; i++) {
|
|
SLONG org = area_Alloc(&BankFree[startBank + i], size);
|
|
if (org != -1) {
|
|
return ((startBank + i) << 16) | org;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
struct sSection *
|
|
FindLargestSection(enum eSectionType type)
|
|
{
|
|
struct sSection *pSection, *r = NULL;
|
|
SLONG nLargest = 0;
|
|
|
|
pSection = pSections;
|
|
while (pSection) {
|
|
if (pSection->oAssigned == 0 && pSection->Type == type) {
|
|
if (pSection->nByteSize > nLargest) {
|
|
nLargest = pSection->nByteSize;
|
|
r = pSection;
|
|
}
|
|
}
|
|
pSection = pSection->pNext;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
void
|
|
AssignBankedSections(enum eSectionType type)
|
|
{
|
|
ensureSectionTypeIsValid(type);
|
|
|
|
struct sSection *pSection;
|
|
|
|
while ((pSection = FindLargestSection(type))) {
|
|
SLONG org;
|
|
|
|
if ((org = area_AllocAnyBank(pSection->nByteSize, type)) != -1) {
|
|
pSection->nOrg = org & 0xFFFF;
|
|
pSection->nBank = org >> 16;
|
|
pSection->oAssigned = 1;
|
|
DOMAXBANK(pSection->Type, pSection->nBank);
|
|
} else {
|
|
errx(1, "Unable to place %s section anywhere",
|
|
SECT_ATTRIBUTES[type].name);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
VerifyAndSetBank(struct sSection *pSection)
|
|
{
|
|
ensureSectionTypeIsValid(pSection->Type);
|
|
|
|
if (pSection->nBank >= SECT_ATTRIBUTES[pSection->Type].minBank
|
|
&& pSection->nBank < SECT_ATTRIBUTES[pSection->Type].minBank + SECT_ATTRIBUTES[pSection->Type].bankCount) {
|
|
pSection->nBank += SECT_ATTRIBUTES[pSection->Type].bank + SECT_ATTRIBUTES[pSection->Type].offset;
|
|
return true;
|
|
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void
|
|
AssignSections(void)
|
|
{
|
|
SLONG i;
|
|
struct sSection *pSection;
|
|
|
|
MaxBankUsed = 0;
|
|
|
|
/*
|
|
* Initialize the memory areas
|
|
*
|
|
*/
|
|
|
|
for (i = 0; i < MAXBANKS; i += 1) {
|
|
BankFree[i] = malloc(sizeof *BankFree[i]);
|
|
|
|
if (!BankFree[i]) {
|
|
err(1, NULL);
|
|
}
|
|
|
|
if (i == BANK_ROM0) {
|
|
/* ROM0 bank */
|
|
BankFree[i]->nOrg = 0x0000;
|
|
if (options & OPT_SMALL) {
|
|
BankFree[i]->nSize = 0x8000;
|
|
} else {
|
|
BankFree[i]->nSize = 0x4000;
|
|
}
|
|
} else if (i >= BANK_ROMX && i < BANK_ROMX + BANK_COUNT_ROMX) {
|
|
/* Swappable ROM bank */
|
|
BankFree[i]->nOrg = 0x4000;
|
|
/*
|
|
* Now, this shouldn't really be necessary... but for
|
|
* good measure we'll do it anyway.
|
|
*/
|
|
if (options & OPT_SMALL) {
|
|
BankFree[i]->nSize = 0;
|
|
} else {
|
|
BankFree[i]->nSize = 0x4000;
|
|
}
|
|
} else if (i == BANK_WRAM0) {
|
|
/* WRAM */
|
|
BankFree[i]->nOrg = 0xC000;
|
|
BankFree[i]->nSize = 0x1000;
|
|
} else if (i >= BANK_SRAM && i < BANK_SRAM + BANK_COUNT_SRAM) {
|
|
/* Swappable SRAM bank */
|
|
BankFree[i]->nOrg = 0xA000;
|
|
BankFree[i]->nSize = 0x2000;
|
|
} else if (i >= BANK_WRAMX && i < BANK_WRAMX + BANK_COUNT_WRAMX) {
|
|
/* Swappable WRAM bank */
|
|
BankFree[i]->nOrg = 0xD000;
|
|
BankFree[i]->nSize = 0x1000;
|
|
} else if (i >= BANK_VRAM && i < BANK_VRAM + BANK_COUNT_VRAM) {
|
|
/* Swappable VRAM bank */
|
|
BankFree[i]->nOrg = 0x8000;
|
|
BankFree[i]->nSize = 0x2000;
|
|
} else if (i == BANK_HRAM) {
|
|
/* HRAM */
|
|
BankFree[i]->nOrg = 0xFF80;
|
|
BankFree[i]->nSize = 0x007F;
|
|
} else {
|
|
errx(1, "(INTERNAL) Unknown bank type!");
|
|
}
|
|
|
|
MaxAvail[i] = BankFree[i]->nSize;
|
|
BankFree[i]->pPrev = NULL;
|
|
BankFree[i]->pNext = NULL;
|
|
}
|
|
|
|
/*
|
|
* First, let's assign all the fixed sections...
|
|
* And all because of that Jens Restemeier character ;)
|
|
*
|
|
*/
|
|
|
|
pSection = pSections;
|
|
while (pSection) {
|
|
if ((pSection->nOrg != -1 || pSection->nBank != -1)
|
|
&& pSection->oAssigned == 0) {
|
|
/* User wants to have a say... */
|
|
|
|
switch (pSection->Type) {
|
|
case SECT_WRAM0:
|
|
case SECT_HRAM:
|
|
case SECT_ROM0:
|
|
pSection->nBank = SECT_ATTRIBUTES[pSection->Type].bank;
|
|
if (area_AllocAbs(&BankFree[pSection->nBank], pSection->nOrg,
|
|
pSection->nByteSize) == -1) {
|
|
errx(1, "Unable to load fixed %s section at $%lX",
|
|
SECT_ATTRIBUTES[pSection->Type].name,
|
|
pSection->nOrg);
|
|
}
|
|
pSection->oAssigned = 1;
|
|
break;
|
|
|
|
case SECT_SRAM:
|
|
case SECT_WRAMX:
|
|
case SECT_VRAM:
|
|
case SECT_ROMX:
|
|
if (pSection->nBank != -1 && pSection->nOrg != -1) {
|
|
if (VerifyAndSetBank(pSection) &&
|
|
area_AllocAbs(&BankFree[pSection->nBank], pSection->nOrg, pSection->nByteSize) != -1) {
|
|
DOMAXBANK(pSection->Type, pSection->nBank);
|
|
pSection->oAssigned = 1;
|
|
} else {
|
|
errx(1,
|
|
"Unable to load fixed %s section at $%lX in bank $%02lX", SECT_ATTRIBUTES[pSection->Type].name, pSection->nOrg, pSection->nBank);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
pSection = pSection->pNext;
|
|
}
|
|
|
|
/*
|
|
* Next, let's assign all the bankfixed ONLY ROMX sections...
|
|
*
|
|
*/
|
|
|
|
pSection = pSections;
|
|
while (pSection) {
|
|
if (pSection->oAssigned == 0
|
|
&& pSection->nOrg == -1 && pSection->nBank != -1) {
|
|
if (pSection->Type == SECT_ROMX && options & OPT_OVERLAY) {
|
|
errx(1, "All ROMX sections must be fixed when using overlay");
|
|
}
|
|
switch (pSection->Type) {
|
|
case SECT_ROMX:
|
|
case SECT_SRAM:
|
|
case SECT_VRAM:
|
|
case SECT_WRAMX:
|
|
if (VerifyAndSetBank(pSection) &&
|
|
(pSection->nOrg = area_Alloc(&BankFree[pSection->nBank], pSection->nByteSize)) != -1) {
|
|
pSection->oAssigned = 1;
|
|
DOMAXBANK(pSection->Type, pSection->nBank);
|
|
} else {
|
|
errx(1, "Unable to load fixed %s section into bank $%02lX",
|
|
SECT_ATTRIBUTES[pSection->Type].name, pSection->nBank);
|
|
}
|
|
break;
|
|
|
|
default: // Handle other sections later
|
|
break;
|
|
}
|
|
}
|
|
|
|
pSection = pSection->pNext;
|
|
}
|
|
|
|
/*
|
|
* Now, let's assign all the floating bank but fixed ROMX sections...
|
|
*
|
|
*/
|
|
|
|
pSection = pSections;
|
|
while (pSection) {
|
|
if (pSection->oAssigned == 0
|
|
&& pSection->nOrg != -1 && pSection->nBank == -1) {
|
|
if (pSection->Type == SECT_ROMX && options & OPT_OVERLAY) {
|
|
errx(1, "All ROMX sections must be fixed when using overlay");
|
|
}
|
|
switch (pSection->Type) {
|
|
case SECT_ROMX:
|
|
case SECT_VRAM:
|
|
case SECT_SRAM:
|
|
case SECT_WRAMX:
|
|
if ((pSection->nBank =
|
|
area_AllocAbsAnyBank(pSection->nOrg, pSection->nByteSize,
|
|
pSection->Type)) == -1) {
|
|
errx(1, "Unable to load fixed %s section at $%lX into any bank",
|
|
SECT_ATTRIBUTES[pSection->Type].name, pSection->nOrg);
|
|
}
|
|
pSection->oAssigned = 1;
|
|
DOMAXBANK(pSection->Type, pSection->nBank);
|
|
break;
|
|
|
|
default: // Handle other sections later
|
|
break;
|
|
}
|
|
}
|
|
|
|
pSection = pSection->pNext;
|
|
}
|
|
|
|
/*
|
|
* OK, all that nasty stuff is done so let's assign all the other
|
|
* sections
|
|
*
|
|
*/
|
|
|
|
pSection = pSections;
|
|
while (pSection) {
|
|
if (pSection->oAssigned == 0) {
|
|
if (pSection->Type == SECT_ROMX && options & OPT_OVERLAY) {
|
|
errx(1, "All ROMX sections must be fixed when using overlay");
|
|
}
|
|
switch (pSection->Type) {
|
|
case SECT_WRAM0:
|
|
case SECT_HRAM:
|
|
case SECT_ROM0:
|
|
pSection->nBank = SECT_ATTRIBUTES[pSection->Type].bank;
|
|
if ((pSection->nOrg =
|
|
area_Alloc(&BankFree[pSection->nBank],
|
|
pSection->nByteSize)) == -1) {
|
|
errx(1, "%s section too large", SECT_ATTRIBUTES[pSection->Type].name);
|
|
}
|
|
pSection->oAssigned = 1;
|
|
break;
|
|
|
|
case SECT_SRAM:
|
|
case SECT_VRAM:
|
|
case SECT_WRAMX:
|
|
case SECT_ROMX:
|
|
break;
|
|
|
|
default:
|
|
errx(1, "(INTERNAL) Unknown section type!");
|
|
break;
|
|
}
|
|
}
|
|
pSection = pSection->pNext;
|
|
}
|
|
|
|
AssignBankedSections(SECT_ROMX);
|
|
AssignBankedSections(SECT_VRAM);
|
|
AssignBankedSections(SECT_WRAMX);
|
|
AssignBankedSections(SECT_SRAM);
|
|
}
|
|
|
|
void
|
|
CreateSymbolTable(void)
|
|
{
|
|
struct sSection *pSect;
|
|
|
|
sym_Init();
|
|
|
|
pSect = pSections;
|
|
|
|
while (pSect) {
|
|
SLONG i;
|
|
|
|
i = pSect->nNumberOfSymbols;
|
|
|
|
while (i--) {
|
|
if ((pSect->tSymbols[i]->Type == SYM_EXPORT) &&
|
|
((pSect->tSymbols[i]->pSection == pSect) ||
|
|
(pSect->tSymbols[i]->pSection == NULL))) {
|
|
if (pSect->tSymbols[i]->pSection == NULL)
|
|
sym_CreateSymbol(pSect->tSymbols[i]->
|
|
pzName,
|
|
pSect->tSymbols[i]->
|
|
nOffset, -1);
|
|
else
|
|
sym_CreateSymbol(pSect->tSymbols[i]->
|
|
pzName,
|
|
pSect->nOrg +
|
|
pSect->tSymbols[i]->
|
|
nOffset, pSect->nBank);
|
|
}
|
|
}
|
|
pSect = pSect->pNext;
|
|
}
|
|
}
|