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[kernel] Re-enable most of kernel_main

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The `kernel_main()` had a lot change out from under it with the
bootloader changes. This change brings most of it back in line with the
new kernel arguments.

Tags: pml4 paging boot
This commit is contained in:
Justin C. Miller
2020-05-24 17:58:45 -07:00
parent 35b1d37df0
commit bfd13e7a9b
4 changed files with 35 additions and 32 deletions
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11
src/kernel/page_manager.cpp
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@@ -14,7 +14,7 @@ using memory::kernel_offset;
using memory::page_offset;
using memory::page_mappable;
page_manager g_page_manager(g_frame_allocator);
page_manager g_page_manager(g_frame_allocator, 0);
extern kutil::vm_space g_kernel_space;
// NB: in 4KiB page table entries, bit 7 isn't pagesize but PAT. Currently this
@@ -45,7 +45,8 @@ struct free_page_header
};
page_manager::page_manager(frame_allocator &frames) :
page_manager::page_manager(frame_allocator &frames, page_table *pml4) :
m_kernel_pml4(pml4),
m_page_cache(nullptr),
m_frames(frames)
{
@@ -56,9 +57,9 @@ page_manager::create_process_map()
{
page_table *table = get_table_page();
kutil::memset(table, 0, frame_size);
table->entries[510] = m_kernel_pml4->entries[510];
table->entries[511] = m_kernel_pml4->entries[511];
kutil::memset(table, 0, frame_size/2);
for (unsigned i = 256; i < 512; ++i)
table->entries[i] = m_kernel_pml4->entries[i];
// Create the initial user stack
map_pages(