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Implement SRAM sections.

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This commit is contained in:
Anthony J. Bentley
2013-07-31 20:04:46 -06:00
parent 6aecf65552
commit 7ab9742299
7 changed files with 192 additions and 10 deletions
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167
src/link/assign.c
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@@ -16,10 +16,12 @@ struct sFreeArea *BankFree[MAXBANKS];
SLONG MaxAvail[MAXBANKS];
SLONG MaxBankUsed;
SLONG MaxWBankUsed;
SLONG MaxSBankUsed;
SLONG MaxVBankUsed;
#define DOMAXBANK(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);}
SLONG
@@ -89,6 +91,19 @@ area_AllocAbs(struct sFreeArea ** ppArea, SLONG org, SLONG size)
return (-1);
}
SLONG
area_AllocAbsSRAMAnyBank(SLONG org, SLONG size)
{
int i;
for (i = 0; i < 4; ++i) {
if (area_AllocAbs(&BankFree[BANK_SRAM + i], org, size) == org) {
return BANK_SRAM + i;
}
}
return -1;
}
SLONG
area_AllocAbsWRAMAnyBank(SLONG org, SLONG size)
{
@@ -165,6 +180,19 @@ area_AllocVRAMAnyBank(SLONG size)
return (-1);
}
SLONG
area_AllocSRAMAnyBank(SLONG size)
{
SLONG i, org;
for (i = 0; i < 4; ++i) {
if ((org = area_Alloc(&BankFree[BANK_SRAM + i], size)) != -1) {
return (i << 16) | org;
}
}
return -1;
}
SLONG
area_AllocWRAMAnyBank(SLONG size)
{
@@ -230,6 +258,25 @@ FindLargestVRAM(void)
return r;
}
struct sSection *
FindLargestSRAM(void)
{
struct sSection *pSection, *r = NULL;
SLONG nLargest = 0;
pSection = pSections;
while (pSection) {
if (pSection->oAssigned == 0 && pSection->Type == SECT_SRAM) {
if (pSection->nByteSize > nLargest) {
nLargest = pSection->nByteSize;
r = pSection;
}
}
pSection = pSection->pNext;
}
return r;
}
struct sSection *
FindLargestCode(void)
{
@@ -270,6 +317,27 @@ AssignVRAMSections(void)
}
}
void
AssignSRAMSections(void)
{
struct sSection *pSection;
while ((pSection = FindLargestSRAM())) {
SLONG org;
if ((org = area_AllocSRAMAnyBank(pSection->nByteSize)) != -1) {
pSection->nOrg = org & 0xFFFF;
pSection->nBank = org >> 16;
pSection->oAssigned = 1;
DOMAXSBANK(pSection->nBank);
} else {
fprintf(stderr,
"Unable to place SRAM section anywhere\n");
exit(1);
}
}
}
void
AssignWRAMSections(void)
{
@@ -362,8 +430,13 @@ AssignSections(void)
BankFree[i]->nOrg = 0xC000;
BankFree[i]->nSize = 0x1000;
MaxAvail[i] = 0x1000;
} else if (i >= BANK_SRAM && i <= BANK_SRAM + 3) {
/* Swappable SRAM bank */
BankFree[i]->nOrg = 0xA000;
BankFree[i]->nSize = 0x2000;
MaxAvail[i] = 0x2000;
} else if (i >= BANK_WRAMX && i <= BANK_WRAMX + 6) {
/* Swappable VRAM bank */
/* Swappable WRAM bank */
BankFree[i]->nOrg = 0xD000;
BankFree[i]->nSize = 0x1000;
MaxAvail[i] = 0x1000;
@@ -419,6 +492,59 @@ AssignSections(void)
pSection->oAssigned = 1;
pSection->nBank = BANK_HRAM;
break;
case SECT_SRAM:
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 >= 0
&& pSection->nBank <= 3) {
pSection->nBank +=
BANK_SRAM;
if (area_AllocAbs
(&BankFree
[pSection->nBank],
pSection->nOrg,
pSection->nByteSize)
!= pSection->nOrg) {
fprintf(stderr,
"Unable to load fixed SRAM section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank);
exit(1);
}
DOMAXVBANK(pSection->
nBank);
pSection->oAssigned = 1;
} else {
fprintf(stderr,
"Unable to load fixed SRAM section at $%lX in bank $%02lX\n", pSection->nOrg, pSection->nBank);
exit(1);
}
}
}
break;
case SECT_WRAMX:
if (pSection->nBank == -1) {
/*
@@ -620,6 +746,24 @@ AssignSections(void)
fprintf(stderr, "Unable to load fixed CODE/DATA section into bank $%02lX\n", pSection->nBank);
exit(1);
}
} else if (pSection->oAssigned == 0
&& pSection->Type == SECT_SRAM
&& pSection->nOrg == -1 && pSection->nBank != -1) {
pSection->nBank += BANK_SRAM;
/* User wants to have a say... and he's pissed */
if (pSection->nBank >= BANK_SRAM && pSection->nBank <= BANK_SRAM + 3) {
if ((pSection->nOrg =
area_Alloc(&BankFree[pSection->nBank],
pSection->nByteSize)) == -1) {
fprintf(stderr, "Unable to load fixed SRAM section into bank $%02lX\n", pSection->nBank);
exit(1);
}
pSection->oAssigned = 1;
DOMAXSBANK(pSection->nBank);
} else {
fprintf(stderr, "Unable to load fixed VRAM section into bank $%02lX\n", pSection->nBank);
exit(1);
}
} else if (pSection->oAssigned == 0
&& pSection->Type == SECT_VRAM
&& pSection->nOrg == -1 && pSection->nBank != -1) {
@@ -629,13 +773,13 @@ AssignSections(void)
if ((pSection->nOrg =
area_Alloc(&BankFree[pSection->nBank],
pSection->nByteSize)) == -1) {
fprintf(stderr, "Unable to load fixed VRAM section into bank $%02lX\n", pSection->nBank - BANK_VRAM);
fprintf(stderr, "Unable to load fixed VRAM section into bank $%02lX\n", pSection->nBank);
exit(1);
}
pSection->oAssigned = 1;
DOMAXVBANK(pSection->nBank);
} else {
fprintf(stderr, "Unable to load fixed VRAM section into bank $%02lX\n", pSection->nBank - BANK_VRAM);
fprintf(stderr, "Unable to load fixed VRAM section into bank $%02lX\n", pSection->nBank);
exit(1);
}
} else if (pSection->oAssigned == 0
@@ -695,6 +839,20 @@ AssignSections(void)
}
pSection->oAssigned = 1;
DOMAXVBANK(pSection->nBank);
} else if (pSection->oAssigned == 0
&& pSection->Type == SECT_SRAM
&& pSection->nOrg != -1 && pSection->nBank == -1) {
/* User wants to have a say... and he's back with a
* vengeance */
if ((pSection->nBank =
area_AllocAbsSRAMAnyBank(pSection->nOrg,
pSection->nByteSize)) ==
-1) {
fprintf(stderr, "Unable to load fixed SRAM section at $%lX into any bank\n", pSection->nOrg);
exit(1);
}
pSection->oAssigned = 1;
DOMAXSBANK(pSection->nBank);
} else if (pSection->oAssigned == 0
&& pSection->Type == SECT_WRAMX
&& pSection->nOrg != -1 && pSection->nBank == -1) {
@@ -743,6 +901,8 @@ AssignSections(void)
pSection->nBank = BANK_HRAM;
pSection->oAssigned = 1;
break;
case SECT_SRAM:
break;
case SECT_VRAM:
break;
case SECT_WRAMX:
@@ -771,6 +931,7 @@ AssignSections(void)
AssignCodeSections();
AssignVRAMSections();
AssignWRAMSections();
AssignSRAMSections();
}
void