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Kernel: Use the Multiboot memory map info to inform our paging setup.

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This makes it possible to run Serenity with more than 64 MB of RAM.
Because each physical page is represented by a PhysicalPage object, and such
objects are allocated using kmalloc_eternal(), more RAM means more pressure
on kmalloc_eternal(), so we're gonna need a better strategy for this.

But for now, let's just celebrate that we can use the 128 MB of RAM we've
been telling QEMU to run with. :^)
This commit is contained in:
Andreas Kling 2019-06-09 11:48:58 +02:00
parent 8258b699db
commit 9da62f52a1
4 changed files with 63 additions and 30 deletions
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8
Kernel/kmalloc.cpp
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@ -23,11 +23,11 @@ struct [[gnu::packed]] allocation_t
#define CHUNK_SIZE 32
#define POOL_SIZE (1024 * 1024)
#define ETERNAL_BASE_PHYSICAL 0x100000
#define ETERNAL_RANGE_SIZE 0x100000
#define ETERNAL_BASE_PHYSICAL (1 * MB)
#define ETERNAL_RANGE_SIZE (2 * MB)
#define BASE_PHYSICAL 0x200000
#define RANGE_SIZE 0x100000
#define BASE_PHYSICAL (3 * MB)
#define RANGE_SIZE (1 * MB)
static byte alloc_map[POOL_SIZE / CHUNK_SIZE / 8];