ada/csce410pine64backup
Archived
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Still debugging. Something wrong with writing to pages. Going to give it another go after bed.

Browse source
This commit is contained in:
Alexander Huddleston 2017-06-27 04:07:08 -05:00
parent 495243854b
commit 6a466fe48d
2 changed files with 15 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
MP3/MP3_Sources/kernel.C
View file

@ -173,7 +173,6 @@ int main() {
for (i=0; i<NACCESS; i++) { for (i=0; i<NACCESS; i++) {
foo[i] = i; foo[i] = i;
} }
Console::puts("DONE WRITING TO MEMORY. Now testing...\n"); Console::puts("DONE WRITING TO MEMORY. Now testing...\n");
for (i=0; i<NACCESS; i++) { for (i=0; i<NACCESS; i++) {

17
MP3/MP3_Sources/page_table.C
View file

@ -32,7 +32,13 @@ PageTable::PageTable()
unsigned long tempaddr = 0; // Temporary address iterator. unsigned long tempaddr = 0; // Temporary address iterator.
// We need to map the first 4MB. // We need to map the first 4MB.
for(unsigned int i = 0; i < 1024; i++) for(unsigned int i = 0; i < 512; i++)
{
page_table[i] = tempaddr | 3; // set bits 0 and 1 to present and read/write respectively
tempaddr += 4096; // 4096 = 4kb
}
for(unsigned int i = 512; i < 1024; i++)
{ {
page_table[i] = tempaddr | 3; // set bits 0 and 1 to present and read/write respectively page_table[i] = tempaddr | 3; // set bits 0 and 1 to present and read/write respectively
tempaddr += 4096; // 4096 = 4kb tempaddr += 4096; // 4096 = 4kb
@ -73,7 +79,8 @@ void PageTable::enable_paging()
void PageTable::handle_fault(REGS * _r) void PageTable::handle_fault(REGS * _r)
{ {
unsigned long temp_addr = (process_mem_pool->get_frames(1)); unsigned long temp_addr = (kernel_mem_pool->get_frames(1));
((unsigned long *) ((unsigned long *) current_page_table->page_directory)[0])[temp_addr] ((unsigned long *) ((unsigned long *) current_page_table->page_directory)[0])[temp_addr]
= ((unsigned long *) ((unsigned long *) current_page_table->page_directory)[0])[temp_addr] | 3; = ((unsigned long *) ((unsigned long *) current_page_table->page_directory)[0])[temp_addr] | 3;
@ -81,7 +88,11 @@ void PageTable::handle_fault(REGS * _r)
Console::puti(_r->err_code); Console::puti(_r->err_code);
unsigned char mask = 0x00; unsigned char mask = 0x00;
read_cr2(); Console::puts("\naddress: ");
Console::puti(read_cr2());
Console::puts("\naddress: ");
Console::puti(read_cr3());
Console::puts("\nhandled page fault\n"); Console::puts("\nhandled page fault\n");
} }