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Prekernel: Export some multiboot parameters in our own BootInfo struct

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This allows us to specify virtual addresses for things the kernel should
access via virtual addresses later on. By doing this we can make the
kernel independent from specific physical addresses.
This commit is contained in:
Gunnar Beutner 2021-07-26 15:09:36 +02:00 • committed by Andreas Kling
parent ff292fbe5a
commit b10a86d463
8 changed files with 67 additions and 25 deletions
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14
Kernel/Prekernel/init.cpp
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@ -143,7 +143,7 @@ extern "C" [[noreturn]] void init()
multiboot_info_ptr->mods_count--;
multiboot_info_ptr->mods_addr += sizeof(multiboot_module_entry_t);
auto adjust_by_load_base = [kernel_load_base](auto* ptr) {
auto adjust_by_load_base = [kernel_load_base](auto ptr) {
return (decltype(ptr))((FlatPtr)ptr + kernel_load_base);
};
@ -152,7 +152,6 @@ extern "C" [[noreturn]] void init()
info.end_of_prekernel_image = (PhysicalPtr)end_of_prekernel_image;
info.physical_to_virtual_offset = kernel_load_base;
info.kernel_base = kernel_load_base;
info.multiboot_info_ptr = (FlatPtr)adjust_by_load_base(multiboot_info_ptr);
#if ARCH(X86_64)
info.gdt64ptr = (PhysicalPtr)gdt64ptr;
info.code64_sel = code64_sel;
@ -163,6 +162,17 @@ extern "C" [[noreturn]] void init()
info.boot_pd_kernel = (PhysicalPtr)boot_pd_kernel;
info.boot_pd_kernel_pt1023 = (FlatPtr)adjust_by_load_base(boot_pd_kernel_pt1023);
info.kernel_cmdline = (FlatPtr)adjust_by_load_base(kernel_cmdline);
info.multiboot_flags = multiboot_info_ptr->flags;
info.multiboot_memory_map = adjust_by_load_base((FlatPtr)multiboot_info_ptr->mmap_addr);
info.multiboot_memory_map_count = multiboot_info_ptr->mmap_length / sizeof(multiboot_memory_map_t);
info.multiboot_modules = adjust_by_load_base((FlatPtr)multiboot_info_ptr->mods_addr);
info.multiboot_modules_count = multiboot_info_ptr->mods_count;
info.multiboot_framebuffer_addr = multiboot_info_ptr->framebuffer_addr;
info.multiboot_framebuffer_pitch = multiboot_info_ptr->framebuffer_pitch;
info.multiboot_framebuffer_width = multiboot_info_ptr->framebuffer_width;
info.multiboot_framebuffer_height = multiboot_info_ptr->framebuffer_height;
info.multiboot_framebuffer_bpp = multiboot_info_ptr->framebuffer_bpp;
info.multiboot_framebuffer_type = multiboot_info_ptr->framebuffer_type;
asm(
#if ARCH(I386)