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Kernel: Change PageTable API

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Getting free pages not reserves them, so you don't have to hold
the page table lock :)
This commit is contained in:
Bananymous
2023-08-02 22:09:14 +03:00
parent 64ad752e73
commit 3139391e06
12 changed files with 208 additions and 109 deletions
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4
kernel/kernel/Terminal/VesaTerminalDriver.cpp
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@@ -6,8 +6,6 @@
using namespace Kernel;
extern uint8_t g_kernel_end[];
VesaTerminalDriver* VesaTerminalDriver::create()
{
if (!(g_multiboot_info->flags & MULTIBOOT_FLAGS_FRAMEBUFFER))
@@ -42,7 +40,7 @@ VesaTerminalDriver* VesaTerminalDriver::create()
uint64_t last_page = BAN::Math::div_round_up<uint64_t>(framebuffer.addr + framebuffer.pitch * framebuffer.height, PAGE_SIZE);
uint64_t needed_pages = last_page - first_page + 1;
vaddr_t vaddr = PageTable::kernel().get_free_contiguous_pages(needed_pages, (vaddr_t)g_kernel_end);
vaddr_t vaddr = PageTable::kernel().reserve_free_contiguous_pages(needed_pages, KERNEL_OFFSET);
ASSERT(vaddr);
PageTable::kernel().map_range_at(framebuffer.addr, vaddr, needed_pages * PAGE_SIZE, PageTable::Flags::UserSupervisor | PageTable::Flags::ReadWrite | PageTable::Flags::Present);