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implemented page allocator

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Lorenzo Torres 2026-02-01 14:43:50 +01:00
parent 48421fc0ef
commit 4341e1dce2
6 changed files with 195 additions and 10 deletions
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29
src/main.zig
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@ -2,10 +2,11 @@ const std = @import("std");
const isa = @import("riscv/isa.zig");
const Fdt = @import("Fdt.zig");
const Console = @import("drivers/Console.zig");
const debug = @import("debug.zig");
const mem = @import("mem.zig");
const UART_BASE: usize = 0x10000000;
var console: Console = undefined;
const MEMORY_START = @extern([*]u8, .{.name = "__memory_start"});
fn uart_put(c: u8) void {
const uart: *volatile u8 = @ptrFromInt(UART_BASE);
@ -32,9 +33,29 @@ export fn kmain(hartid: u64, fdt_ptr: *const anyopaque) callconv(.c) noreturn {
while (true) asm volatile ("wfi");
};
console = Console.init(fdt).?;
const root = fdt.root().?;
console.print("booting hydra...\n", .{});
const console = Console.init(fdt).?;
debug.init(console);
debug.print("booting hydra...\n", .{});
var reservations = fdt.memoryReservations();
while (reservations.next()) |reservation| {
debug.print("0x{x}:0x{x}\n", .{reservation.address, reservation.size});
}
const memory = fdt.memory().?;
var reg_iter = Fdt.parseReg(memory.getProperty("reg").?.data, root.addressCells(), root.sizeCells());
const reg = reg_iter.next().?;
const memory_end = reg.address + reg.size;
var buddy: mem.BuddyAllocator = .{};
buddy.init(MEMORY_START[0..memory_end - @intFromPtr(MEMORY_START)]);
debug.print("memory allocator initialized.\n", .{});
const allocator = buddy.allocator();
_ = allocator;
while (true) {
asm volatile ("wfi");