33 lines
1.1 KiB
Zig
33 lines
1.1 KiB
Zig
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const multiboot = @import("../../../src/kernel/multiboot.zig");
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pub const MemProfile = struct {
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vaddr_end: [*]u8,
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vaddr_start: [*]u8,
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physaddr_end: [*]u8,
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physaddr_start: [*]u8,
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mem_kb: u32,
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fixed_alloc_size: u32
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};
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// The virtual/physical start/end of the kernel code
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var KERNEL_PHYSADDR_START: u32 = 0x00100000;
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var KERNEL_PHYSADDR_END: u32 = 0x01000000;
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var KERNEL_VADDR_START: u32 = 0xC0100000;
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var KERNEL_VADDR_END: u32 = 0xC1100000;
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var KERNEL_ADDR_OFFSET: u32 = 0xC0000000;
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// The size of the fixed allocator used before the heap is set up. Set to 1MiB.
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const FIXED_ALLOC_SIZE = 1024 * 1024;
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pub fn init(mb_info: *multiboot.multiboot_info_t) MemProfile {
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return MemProfile{
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.vaddr_end = @ptrCast([*]u8, &KERNEL_VADDR_END),
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.vaddr_start = @ptrCast([*]u8, &KERNEL_VADDR_START),
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.physaddr_end = @ptrCast([*]u8, &KERNEL_PHYSADDR_END),
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.physaddr_start = @ptrCast([*]u8, &KERNEL_PHYSADDR_START),
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// Total memory available including the initial 1MiB that grub doesn't include
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.mem_kb = mb_info.mem_upper + mb_info.mem_lower + 1024,
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.fixed_alloc_size = FIXED_ALLOC_SIZE
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};
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}
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