URL
https://opencores.org/ocsvn/eco32/eco32/trunk
[/] [eco32/] [trunk/] [sim/] [mmu.c] - Diff between revs 202 and 203
Go to most recent revision |
Show entire file |
Details |
Blame |
View Log
| Rev 202 |
Rev 203 |
| Line 65... |
Line 65... |
/* trying to access a privileged address from user mode */
|
/* trying to access a privileged address from user mode */
|
mmuBadAccs = (writing ? MMU_ACCS_WRITE : MMU_ACCS_READ) | accsWidth;
|
mmuBadAccs = (writing ? MMU_ACCS_WRITE : MMU_ACCS_READ) | accsWidth;
|
mmuBadAddr = vAddr;
|
mmuBadAddr = vAddr;
|
throwException(EXC_PRV_ADDRESS);
|
throwException(EXC_PRV_ADDRESS);
|
}
|
}
|
|
updateRandomIndex();
|
if ((vAddr & 0xC0000000) == 0xC0000000) {
|
if ((vAddr & 0xC0000000) == 0xC0000000) {
|
/* unmapped address space */
|
/* unmapped address space */
|
/* simulate delay introduced by assoc when using mapped
|
/* simulate delay introduced by assoc when using mapped
|
addresses but not experienced with unmapped addresses */
|
addresses but not experienced with unmapped addresses */
|
assoc(0);
|
assoc(0);
|
pAddr = vAddr & ~0xC0000000;
|
pAddr = vAddr & ~0xC0000000;
|
} else {
|
} else {
|
/* mapped address space */
|
/* mapped address space */
|
updateRandomIndex();
|
|
page = vAddr & PAGE_MASK;
|
page = vAddr & PAGE_MASK;
|
offset = vAddr & OFFSET_MASK;
|
offset = vAddr & OFFSET_MASK;
|
index = assoc(page);
|
index = assoc(page);
|
if (index == -1) {
|
if (index == -1) {
|
/* TLB miss exception */
|
/* TLB miss exception */
|
© copyright 1999-2024
OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.