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add a class to allocate and manage user space stacks

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Drew Galbraith 2023-05-30 22:35:57 -07:00
parent 1db93e5b12
commit 2eefda6114
6 changed files with 67 additions and 7 deletions
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8
zion/memory/virtual_memory.h
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@ -3,6 +3,7 @@
#include <stdint.h>
#include "debug/debug.h"
#include "memory/user_stack_manager.h"
// VirtualMemory class holds a memory space for an individual process.
//
@ -15,7 +16,7 @@
// 0x00000010 00000000 - 0x0000001F FFFFFFFF : USER_HEAP (64 GiB)
// 0x00000020 00000000 - 0x0000002F FFFFFFFF : MEM_MAP (64 GiB)
// 0x00000040 00000000 - 0x0000004F FFFFFFFF : IPC_BUF (64 GiB)
// 0x00007FFF 00000000 - 0x00007FFF FFFFFFFF : USER_STACK (64 GiB)
// 0x00007FF0 00000000 - 0x00007FFF FFFFFFFF : USER_STACK (64 GiB)
//
// Kernel Regions (Shared across processes):
// 0xFFFF8000 00000000 - 0xFFFF800F FFFFFFFF : HHDM (64 GiB)
@ -46,14 +47,17 @@ class VirtualMemory {
uint64_t cr3() { return cr3_; }
// User Mappings.
uint64_t AllocateUserStack();
uint64_t GetNextMemMapAddr(uint64_t size);
// Kernel
// Kernel Mappings.
uint64_t* AllocateKernelStack();
private:
VirtualMemory(uint64_t cr3) : cr3_(cr3) {}
uint64_t cr3_ = 0;
UserStackManager user_stacks_;
uint64_t next_memmap_addr_ = 0x20'00000000;
};