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Add a new WRAMX section type, for banked (CGB) WRAM sections.

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This commit is contained in:
Anthony J. Bentley
2013-06-19 21:19:51 -06:00
parent ab47428c0e
commit da19380cc4
8 changed files with 201 additions and 17 deletions
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175
src/link/assign.c
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@@ -15,9 +15,11 @@ struct sFreeArea {
struct sFreeArea *BankFree[MAXBANKS];
SLONG MaxAvail[MAXBANKS];
SLONG MaxBankUsed;
SLONG MaxWBankUsed;
SLONG MaxVBankUsed;
#define DOMAXBANK(x) {if( (x)>MaxBankUsed ) MaxBankUsed=(x);}
#define DOMAXWBANK(x) {if( (x)>MaxWBankUsed ) MaxWBankUsed=(x);}
#define DOMAXVBANK(x) {if( (x)>MaxVBankUsed ) MaxVBankUsed=(x);}
SLONG
@@ -87,6 +89,20 @@ area_AllocAbs(struct sFreeArea ** ppArea, SLONG org, SLONG size)
return (-1);
}
SLONG
area_AllocAbsWRAMAnyBank(SLONG org, SLONG size)
{
SLONG i;
for (i = 1; i <= 7; i += 1) {
if (area_AllocAbs(&BankFree[BANK_WRAMX + i - 1], org, size) == org) {
return BANK_WRAMX + i - 1;
}
}
return -1;
}
SLONG
area_AllocAbsVRAMAnyBank(SLONG org, SLONG size)
{
@@ -149,6 +165,20 @@ area_AllocVRAMAnyBank(SLONG size)
return (-1);
}
SLONG
area_AllocWRAMAnyBank(SLONG size)
{
SLONG i, org;
for (i = 1; i <= 7; i += 1) {
if ((org = area_Alloc(&BankFree[BANK_WRAMX + i - 1], size)) != -1) {
return (i << 16) | org;
}
}
return -1;
}
SLONG
area_AllocCODEAnyBank(SLONG size)
{
@@ -162,6 +192,25 @@ area_AllocCODEAnyBank(SLONG size)
return (-1);
}
struct sSection *
FindLargestWRAM(void)
{
struct sSection *pSection, *r = NULL;
SLONG nLargest = 0;
pSection = pSections;
while (pSection) {
if (pSection->oAssigned == 0 && pSection->Type == SECT_WRAMX) {
if (pSection->nByteSize > nLargest) {
nLargest = pSection->nByteSize;
r = pSection;
}
}
pSection = pSection->pNext;
}
return r;
}
struct sSection *
FindLargestVRAM(void)
{
@@ -178,7 +227,7 @@ FindLargestVRAM(void)
}
pSection = pSection->pNext;
}
return (r);
return r;
}
struct sSection *
@@ -221,6 +270,27 @@ AssignVRAMSections(void)
}
}
void
AssignWRAMSections(void)
{
struct sSection *pSection;
while ((pSection = FindLargestWRAM())) {
SLONG org;
if ((org = area_AllocWRAMAnyBank(pSection->nByteSize)) != -1) {
pSection->nOrg = org & 0xFFFF;
pSection->nBank = org >> 16;
pSection->oAssigned = 1;
DOMAXWBANK(pSection->nBank);
} else {
fprintf(stderr,
"Unable to place WRAMX section anywhere\n");
exit(1);
}
}
}
void
AssignCodeSections(void)
{
@@ -290,8 +360,13 @@ AssignSections(void)
} else if (i == BANK_BSS) {
/* WRAM */
BankFree[i]->nOrg = 0xC000;
BankFree[i]->nSize = 0x2000;
MaxAvail[i] = 0x2000;
BankFree[i]->nSize = 0x1000;
MaxAvail[i] = 0x1000;
} else if (i >= BANK_WRAMX && i <= BANK_WRAMX + 6) {
/* Swappable VRAM bank */
BankFree[i]->nOrg = 0xD000;
BankFree[i]->nSize = 0x1000;
MaxAvail[i] = 0x1000;
} else if (i == BANK_VRAM || i == BANK_VRAM + 1) {
/* Swappable VRAM bank */
BankFree[i]->nOrg = 0x8000;
@@ -344,6 +419,59 @@ AssignSections(void)
pSection->oAssigned = 1;
pSection->nBank = BANK_HRAM;
break;
case SECT_WRAMX:
if (pSection->nBank == -1) {
/*
* User doesn't care which bank.
* Therefore he must here be specifying
* position within the bank.
* Defer until later.
*/
;
} else {
/*
* User specified which bank to use.
* Does he also care about position
* within the bank?
*/
if (pSection->nOrg == -1) {
/*
* Nope, any position will do
* Again, we'll do that later
*
*/
;
} else {
/*
* Bank and position within the
* bank are hardcoded.
*/
if (pSection->nBank >= 1
&& pSection->nBank <= 7) {
pSection->nBank +=
BANK_WRAMX;
if (area_AllocAbs
(&BankFree
[pSection->nBank],
pSection->nOrg,
pSection->nByteSize)
!= pSection->nOrg) {
fprintf(stderr,
"Unable to load fixed WRAMX section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank);
exit(1);
}
DOMAXWBANK(pSection->
nBank);
pSection->oAssigned = 1;
} else {
fprintf(stderr,
"Unable to load fixed WRAMX section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank);
exit(1);
}
}
}
break;
case SECT_VRAM:
if (pSection->nBank == -1) {
/*
@@ -383,7 +511,7 @@ AssignSections(void)
pSection->nByteSize)
!= pSection->nOrg) {
fprintf(stderr,
"Unable to load fixed VRAM section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank - BANK_VRAM);
"Unable to load fixed VRAM section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank);
exit(1);
}
DOMAXVBANK(pSection->
@@ -391,7 +519,7 @@ AssignSections(void)
pSection->oAssigned = 1;
} else {
fprintf(stderr,
"Unable to load fixed VRAM section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank - BANK_VRAM);
"Unable to load fixed VRAM section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank);
exit(1);
}
}
@@ -505,11 +633,29 @@ AssignSections(void)
exit(1);
}
pSection->oAssigned = 1;
DOMAXBANK(pSection->nBank);
DOMAXVBANK(pSection->nBank);
} else {
fprintf(stderr, "Unable to load fixed VRAM section into bank $%02lX\n", pSection->nBank - BANK_VRAM);
exit(1);
}
} else if (pSection->oAssigned == 0
&& pSection->Type == SECT_WRAMX
&& pSection->nOrg == -1 && pSection->nBank != -1) {
pSection->nBank += BANK_WRAMX;
/* User wants to have a say... and he's pissed */
if (pSection->nBank >= BANK_WRAMX && pSection->nBank <= BANK_WRAMX + 6) {
if ((pSection->nOrg =
area_Alloc(&BankFree[pSection->nBank],
pSection->nByteSize)) == -1) {
fprintf(stderr, "Unable to load fixed WRAMX section into bank $%02lX\n", pSection->nBank - BANK_WRAMX);
exit(1);
}
pSection->oAssigned = 1;
DOMAXWBANK(pSection->nBank);
} else {
fprintf(stderr, "Unable to load fixed WRAMX section into bank $%02lX\n", pSection->nBank - BANK_WRAMX);
exit(1);
}
}
pSection = pSection->pNext;
}
@@ -549,6 +695,20 @@ AssignSections(void)
}
pSection->oAssigned = 1;
DOMAXVBANK(pSection->nBank);
} else if (pSection->oAssigned == 0
&& pSection->Type == SECT_WRAMX
&& pSection->nOrg != -1 && pSection->nBank == -1) {
/* User wants to have a say... and he's back with a
* vengeance */
if ((pSection->nBank =
area_AllocAbsWRAMAnyBank(pSection->nOrg,
pSection->nByteSize)) ==
-1) {
fprintf(stderr, "Unable to load fixed WRAMX section at $%lX into any bank\n", pSection->nOrg);
exit(1);
}
pSection->oAssigned = 1;
DOMAXWBANK(pSection->nBank);
}
pSection = pSection->pNext;
}
@@ -585,6 +745,8 @@ AssignSections(void)
break;
case SECT_VRAM:
break;
case SECT_WRAMX:
break;
case SECT_HOME:
if ((pSection->nOrg =
area_Alloc(&BankFree[BANK_HOME],
@@ -608,6 +770,7 @@ AssignSections(void)
AssignCodeSections();
AssignVRAMSections();
AssignWRAMSections();
}
void