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[Zion] Return freed kernel stacks to pool.

This commit is contained in:
Drew Galbraith 2023-11-24 16:04:40 -08:00
parent 8fb5b7c03c
commit d1ace374b6
2 changed files with 11 additions and 3 deletions
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10
zion/memory/kernel_stack_manager.cpp
View File

@ -15,6 +15,9 @@ void KernelStackManager::SetupInterruptStack() {
}
uint64_t KernelStackManager::AllocateKernelStack() {
if (!free_stacks_.empty()) {
return free_stacks_.PopFront();
}
next_stack_addr_ += kKernelStackOffset;
if (next_stack_addr_ >= kKernelStackEnd) {
panic("No more kernel stack space");
@ -24,6 +27,9 @@ uint64_t KernelStackManager::AllocateKernelStack() {
}
void KernelStackManager::FreeKernelStack(uint64_t stack_base) {
freed_stack_cnt_++;
dbgln("Freed kernel stacks using {} KiB", freed_stack_cnt_ * 12);
// TODO: Validate this value.
if ((stack_base & 0x3FF8) != 0x3FF8) {
dbgln("Odd kernel stack free {x}", stack_base);
}
free_stacks_.PushFront(stack_base);
}

4
zion/memory/kernel_stack_manager.h
View File

@ -1,5 +1,6 @@
#pragma once
#include <glacier/container/linked_list.h>
#include <stdint.h>
// KernelStackManager doles out kernel stacks.
@ -24,5 +25,6 @@ class KernelStackManager {
private:
uint64_t next_stack_addr_;
uint64_t freed_stack_cnt_ = 0;
glcr::LinkedList<uint64_t> free_stacks_;
};