32 lines
908 B
C++
32 lines
908 B
C++
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#include "memory/kernel_stack_manager.h"
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#include "debug/debug.h"
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#include "memory/paging_util.h"
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#define KERNEL_STACK_START 0xFFFFFFFF'90000000
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#define KERNEL_STACK_LIMIT 0xFFFFFFFF'9FFFFFFF
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#define KERNEL_STACK_OFFSET 0x4000
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KernelStackManager* gKernelStackManager;
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void KernelStackManager::Init() {
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gKernelStackManager = new KernelStackManager();
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}
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KernelStackManager::KernelStackManager()
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: next_stack_addr_(KERNEL_STACK_START) {}
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uint64_t* KernelStackManager::AllocateKernelStack() {
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next_stack_addr_ += KERNEL_STACK_OFFSET;
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if (next_stack_addr_ >= KERNEL_STACK_LIMIT) {
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panic("No more kernelstack space");
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}
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EnsureResident(next_stack_addr_ - 0x3000, 0x3000);
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return reinterpret_cast<uint64_t*>(next_stack_addr_) - 1;
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}
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void KernelStackManager::FreeKernelStack(uint64_t stack_base) {
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freed_stack_cnt_++;
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dbgln("Freed kernel stacks using %u KiB", freed_stack_cnt_ * 12);
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}
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