1 files changed, 0 insertions, 152 deletions
diff --git a/lib/random.cc b/lib/random.cc
deleted file mode 100644
index 428c75c..0000000
--- a/lib/random.cc
+++ /dev/null
@@ -1,152 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-#include <lume/random.h>
-#include <arch/random.h>
-#include <lume/klog.h>
-
-#include <lume/kprintf.h>
-
-/*
- * Early Boot PRNG (xoshiro256**)
- * State size: 256 bits (4 * 64-bit words)
- * Extremely fast, excellent statistical properties.
- */
-
-static uint64 g_state[4];
-static bool g_initialized = false;
-static uint64 g_init_seed = 0;
-static RandomSeedSource g_seed_source = RandomSeedSource::Unknown;
-
-static inline uint64 rotl(const uint64 x, int k) {
-    return (x << k) | (x >> (64 - k));
-}
-
-/* SplitMix64 used to initialize xoshiro state from a single 64-bit seed */
-static uint64 splitmix64(uint64& state) {
-    uint64 z = (state += 0x9e3779b97f4a7c15ULL);
-    z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9ULL;
-    z = (z ^ (z >> 27)) * 0x94d049bb133111ebULL;
-    return z ^ (z >> 31);
-}
-
-void random_early_init(uint64 seed)
-{
-    if (g_initialized) return;
-
-    RandomSeedSource source = RandomSeedSource::Unknown;
-
-    /* If seed is 0 (not provided by bootloader), try hardware */
-    if (seed == 0) {
-        uint64 hw_val;
-        if (arch::get_hw_random(hw_val)) {
-            seed = hw_val;
-            source = RandomSeedSource::HwRandom;
-        } else {
-            /* Fallback: use boot cycles mixed with a constant */
-            seed = arch::get_cycles() ^ 0xdeadbeefbadc0ffeULL;
-            source = RandomSeedSource::CycleFallback;
-        }
-    } else {
-        source = RandomSeedSource::FdtProvided;
-    }
-
-    uint64 sm_state = seed;
-    g_state[0] = splitmix64(sm_state);
-    g_state[1] = splitmix64(sm_state);
-    g_state[2] = splitmix64(sm_state);
-    g_state[3] = splitmix64(sm_state);
-
-    g_init_seed = seed;
-    g_seed_source = source;
-    g_initialized = true;
-    kprintf("[random] early PRNG initialized, seed=0x%llx, source=%s\n",
-            seed, random_seed_source_name(source));
-}
-
-uint64 get_random_u64()
-{
-    if (!g_initialized) {
-        random_early_init(0);
-    }
-
-    const uint64 result = rotl(g_state[1] * 5, 7) * 9;
-
-    const uint64 t = g_state[1] << 17;
-
-    g_state[2] ^= g_state[0];
-    g_state[3] ^= g_state[1];
-    g_state[1] ^= g_state[2];
-    g_state[0] ^= g_state[3];
-
-    g_state[2] ^= t;
-    g_state[3] = rotl(g_state[3], 45);
-
-    /* Mix with current cycles for slight additional unpredictability */
-    return result ^ arch::get_cycles();
-}
-
-uint32 get_random_u32()
-{
-    return static_cast<uint32>(get_random_u64() >> 32);
-}
-
-void get_random_bytes(void* buf, size_t len)
-{
-    uint8* p = static_cast<uint8*>(buf);
-    while (len >= 8) {
-        uint64 val = get_random_u64();
-        for (int i = 0; i < 8; i++) {
-            p[i] = (val >> (i * 8)) & 0xFF;
-        }
-        p += 8;
-        len -= 8;
-    }
-    if (len > 0) {
-        uint64 val = get_random_u64();
-        for (size_t i = 0; i < len; i++) {
-            p[i] = (val >> (i * 8)) & 0xFF;
-        }
-    }
-}
-
-void add_device_randomness(const void* buf, size_t len)
-{
-    /*
-     * For now, just mix into the xoshiro state using a simple XOR.
-     * In the future, this will feed the CSPRNG entropy pool.
-     */
-    const uint8* p = static_cast<const uint8*>(buf);
-    uint64 mix = arch::get_cycles();
-    for (size_t i = 0; i < len; i++) {
-        mix = (mix << 5) ^ (mix >> 59) ^ p[i];
-    }
-    
-    g_state[0] ^= mix;
-    g_state[1] ^= arch::get_cycles();
-}
-
-RandomSeedSource random_early_seed_source()
-{
-    return g_seed_source;
-}
-
-uint64 random_early_seed_value()
-{
-    return g_init_seed;
-}
-
-const char* random_seed_source_name(RandomSeedSource source)
-{
-    switch (source) {
-    case RandomSeedSource::FdtProvided:
-        return "fdt";
-    case RandomSeedSource::HwRandom:
-        return "hw";
-    case RandomSeedSource::CycleFallback:
-        return "cycle";
-    case RandomSeedSource::Unknown:
-    default:
-        return "unknown";
-    }
-}