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Kernel: Move PhysicalPage classes out of the heap into an array

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By moving the PhysicalPage classes out of the kernel heap into a static
array, one for each physical page, we can avoid the added overhead and
easily find them by indexing into an array.

This also wraps the PhysicalPage into a PhysicalPageEntry, which allows
us to re-use each slot with information where to find the next free
page.
This commit is contained in:
Tom 2021-07-07 19:50:05 -06:00 • committed by Andreas Kling
parent ad5d9d648b
commit 87dc4c3d2c
11 changed files with 285 additions and 43 deletions
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7
Kernel/Sections.h
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@ -12,3 +12,10 @@
#define UNMAP_AFTER_INIT NEVER_INLINE __attribute__((section(".unmap_after_init")))
#define KERNEL_BASE 0xC0000000
#define KERNEL_PD_OFFSET 0x2000000
#define KERNEL_PD_END 0xF1000000
#define KERNEL_PT1024_BASE 0xFFE00000
#define KERNEL_QUICKMAP_PT (KERNEL_PT1024_BASE + 0x6000)
#define KERNEL_QUICKMAP_PD (KERNEL_PT1024_BASE + 0x7000)
#define KERNEL_QUICKMAP_PER_CPU_BASE (KERNEL_PT1024_BASE + 0x8000)
#define KERNEL_PHYSICAL_PAGES_BASE (KERNEL_BASE + KERNEL_PD_OFFSET)