50 lines
1.3 KiB
Zig
50 lines
1.3 KiB
Zig
const std = @import("std");
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const multiboot = @import("../../../src/kernel/multiboot.zig");
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pub const Module = struct {
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region: Range,
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name: []const u8,
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};
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pub const Map = struct {
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virtual: Range,
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physical: ?Range,
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};
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pub const Range = struct {
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start: usize,
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end: usize,
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};
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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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modules: []Module,
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virtual_reserved: []Map,
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physical_reserved: []Range,
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fixed_allocator: std.heap.FixedBufferAllocator,
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};
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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 virtToPhys(virt: var) @TypeOf(virt) {
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const T = @TypeOf(virt);
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return switch (@typeInfo(T)) {
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.Pointer => @intToPtr(T, @ptrToInt(virt) - KERNEL_ADDR_OFFSET),
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.Int => virt - KERNEL_ADDR_OFFSET,
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else => @compileError("Only pointers and integers are supported"),
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};
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}
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pub fn physToVirt(phys: var) @TypeOf(phys) {
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const T = @TypeOf(phys);
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return switch (@typeInfo(T)) {
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.Pointer => @intToPtr(T, @ptrToInt(phys) + KERNEL_ADDR_OFFSET),
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.Int => phys + KERNEL_ADDR_OFFSET,
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else => @compileError("Only pointers and integers are supported"),
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};
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}
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