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KimisOS
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Fixed over-allocating memory that ends up being unused

This commit is contained in:
notsomeidiot123 2025-10-14 10:36:09 -04:00
parent 1705096d91
commit c19b4ffc6f
3 changed files with 10 additions and 17 deletions
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6
makefile
View File

@ -14,9 +14,9 @@ all: bootloader tools kernel
# ./diskwrite idm.elf ifsm.elf kernel.elf initrc.conf -o image.bin
./diskwrite initrd.rd kernel.elf -o image.bin
sudo mount image.bin mount
sudo mkdir mount/mod # for kernel modules
sudo mkdir mount/bin # for binary executables
sudo mkdir mount/sys # for system files
# sudo mkdir mount/mod # for kernel modules
# sudo mkdir mount/bin # for binary executables
# sudo mkdir mount/sys # for system files
# ./diskwrite -v -o image.bin
# ./diskwrite -v -l kernel.elf idm.elf -o image.bin
qemu-system-i386 -hda image.bin -hdc test.bin --no-reboot --no-shutdown -m 32m -smp 2 -serial mon:stdio -D intlog.txt -d int

10
src/kernel/arch_i386/memory.c
View File

@ -25,11 +25,10 @@ uint32_t pm_alloc(){
}
}
uint32_t pm_alloc_index(uint32_t index){
// printf("%x\n", index);
for(uint32_t i = index; i < index + 2; i++){
for(uint32_t i = 0; i < 2; i++){
for(int j = 0; j < 8; j++){
// if(!(pm_map[i] & (1 << j))){
pm_map[i] |= (1 << j);
pm_map[i + index] |= (1 << j);
// }
}
}
@ -39,7 +38,9 @@ uint32_t pm_alloc_64kaligned(){
uint32_t cont = 0;
uint32_t current = 0;
for(uint32_t i = 0; i < mmap_count; i++){
// printf("Index: %x\n", i);
if(i & 1 && cont < 1){
continue;
}
for(int j = 0; j < 8; j++){
if(!(pm_map[i] & (1 << j))){
continue;
@ -50,7 +51,6 @@ uint32_t pm_alloc_64kaligned(){
}
}
if(cont == 1){
// printf("Allocating index: %x (%x)\n", i, pm_map[i]);
return pm_alloc_index(current);
}
current = i;

11
src/kmodules/disk_driver.c
View File

@ -475,6 +475,8 @@ uint8_t ata_identify(uint32_t index, uint16_t disk){
if(drives[i].type == TYPE_IDE) ata_drives++;
}
drives[index].type = TYPE_IDE;
uint32_t prdt_phys = api(MODULE_API_PMALLOC64K);
drives[index].PRDT = (void *)api(MODULE_API_KMALLOC_PADDR, prdt_phys, 16);
itoa(ata_drives, fname + strlen(fname), 10);
vfile_t *new_file = fcreate(api, fname, VFILE_DEVICE, ata_write, ata_read);
new_file->mount_id = index;
@ -503,15 +505,6 @@ void ide_init(uint32_t BARS[5]){
drives[secondary_index].BARs[4] = BARS[4];
drives[secondary_slave_index].BARs[4] = BARS[4];
drives[secondary_slave_index].flags.slave = 1;
uint32_t prdt_primary_paddr = api(MODULE_API_PMALLOC64K);
uint32_t prdt_primary_slave_paddr = api(MODULE_API_PMALLOC64K);
uint32_t prdt_secondary_paddr = api(MODULE_API_PMALLOC64K);
uint32_t prdt_secondary_slave_paddr = api(MODULE_API_PMALLOC64K);
drives[primary_index].PRDT = (void *)api(MODULE_API_KMALLOC_PADDR, prdt_primary_paddr, 16);
drives[primary_slave_index].PRDT = (void *)api(MODULE_API_KMALLOC_PADDR, prdt_primary_slave_paddr, 16);
drives[secondary_index].PRDT = (void *)api(MODULE_API_KMALLOC_PADDR, prdt_secondary_paddr, 16);
drives[secondary_slave_index].PRDT = (void *)api(MODULE_API_KMALLOC_PADDR, prdt_secondary_slave_paddr, 16);
//now call ATA IDENTIFY
uint8_t master_status = ata_identify(primary_index, ATA_MASTER);
uint8_t slave_status = ata_identify(primary_slave_index, ATA_SLAVE);