diff --git a/exosphere/src/bootup.c b/exosphere/src/bootup.c
index 29bad2497..7015a9085 100644
--- a/exosphere/src/bootup.c
+++ b/exosphere/src/bootup.c
@@ -3,12 +3,83 @@
 #include "utils.h"
 #include "bootup.h"
 
+#include "fuse.h"
+#include "flow.h"
+#include "pmc.h"
+#include "mc.h"
+#include "se.h"
+#include "masterkey.h"
+#include "configitem.h"
+#include "misc.h"
+
 void bootup_misc_mmio(void) {
+    /* Initialize Fuse registers. */
+    fuse_init();
+    
+    /* Verify Security Engine sanity. */
+    se_set_in_context_save_mode(false);
+    /* TODO: se_verify_keys_unreadable(); */
+    se_validate_stored_vector();
+
+    for (unsigned int i = 0; i < KEYSLOT_SWITCH_SESSIONKEY; i++) {
+        clear_aes_keyslot(i);
+    }
+
+    for (unsigned int i = 0; i < KEYSLOT_RSA_MAX; i++) {
+        clear_rsa_keyslot(i);
+    }
+    se_initialize_rng(KEYSLOT_SWITCH_RNGKEY);
+    se_generate_random_key(KEYSLOT_SWITCH_SRKGENKEY, KEYSLOT_SWITCH_RNGKEY);
+    se_generate_srk(KEYSLOT_SWITCH_SRKGENKEY);
+
+    FLOW_CTLR_BPMP_CLUSTER_CONTROL_0 = 4; /* ACTIVE_CLUSTER_LOCK. */
+    FLOW_CTLR_FLOW_DBG_QUAL_0 = 0x10000000; /* Enable FIQ2CCPLEX */
+    
+    /* Disable Deep Power Down. */
+    APBDEV_PMC_DPD_ENABLE_0 = 0;
+
+    /* Setup MC. */
+    /* TODO: What are these MC reg writes? */
+    MAKE_MC_REG(0x984) = 1;
+    MAKE_MC_REG(0x648) = 0;
+    MAKE_MC_REG(0x64C) = 0;
+    MAKE_MC_REG(0x650) = 1;
+    MAKE_MC_REG(0x670) = 0;
+    MAKE_MC_REG(0x674) = 0;
+    MAKE_MC_REG(0x678) = 1;
+    MAKE_MC_REG(0x9A0) = 0;
+    MAKE_MC_REG(0x9A4) = 0;
+    MAKE_MC_REG(0x9A8) = 0;
+    MAKE_MC_REG(0x9AC) = 1;
+    MC_SECURITY_CFG0_0 = 0;
+    MC_SECURITY_CFG1_0 = 0;
+    MC_SECURITY_CFG3_0 = 3;
+    configure_default_carveouts();
+
+    /* Mark registers secure world only. */
+    /* Mark SATA_AUX, DTV, QSPI, SE, SATA, LA secure only. */
+    APB_MISC_SECURE_REGS_APB_SLAVE_SECURITY_ENABLE_REG0_0 = 0x504244;
+
+    /* By default, mark SPI1, SPI2, SPI3, SPI5, SPI6, I2C6 secure only. */
+    uint32_t sec_disable_1 = 0x83700000;
+    /* By default, mark SDMMC3, DDS, DP2 secure only. */
+    uint32_t sec_disable_2 = 0x304;
+    uint64_t hardware_type = configitem_get_hardware_type();
+    if (hardware_type != 1) {
+        /* Also mark I2C5 secure only, */
+        sec_disable_1 |= 0x20000000;
+    }
+    if (hardware_type != 0 && mkey_get_revision() >= MASTERKEY_REVISION_400_CURRENT) {
+        /* Starting on 4.x on non-dev units, mark UARTB, UARTC, SPI4, I2C3 secure only. */
+        sec_disable_1 |= 0x10806000;
+        /* Starting on 4.x on non-dev units, mark SDMMC1 secure only. */
+        sec_disable_2 |= 1;
+    }
+    APB_MISC_SECURE_REGS_APB_SLAVE_SECURITY_ENABLE_REG1_0 = sec_disable_1;
+    APB_MISC_SECURE_REGS_APB_SLAVE_SECURITY_ENABLE_REG2_0 = sec_disable_2;
+
+
     /* TODO */
-    /* This func will also be called on warmboot. */
-    /* And will verify stored SE Test Vector, clear keyslots, */
-    /* Generate an SRK, set the warmboot firmware location, */
-    /* Configure the GPU uCode carveout, configure the Kernel default carveouts, */
     /* Initialize the PMC secure scratch registers, initialize MISC registers, */
     /* And assign "se_operation_completed" to Interrupt 0x5A. */
 }
diff --git a/exosphere/src/configitem.c b/exosphere/src/configitem.c
index fc9af2b88..e97c8ed22 100644
--- a/exosphere/src/configitem.c
+++ b/exosphere/src/configitem.c
@@ -41,6 +41,14 @@ bool configitem_should_profile_battery(void) {
     return g_battery_profile;
 }
 
+uint64_t configitem_get_hardware_type(void) {
+    uint64_t hardware_type;
+    if (configitem_get(CONFIGITEM_HARDWARETYPE, &hardware_type) != 0) {
+        generic_panic();
+    }
+    return hardware_type;
+}
+
 uint32_t configitem_get(enum ConfigItem item, uint64_t *p_outvalue) {
     uint32_t result = 0;
     switch (item) {
diff --git a/exosphere/src/configitem.h b/exosphere/src/configitem.h
index 465ae4740..edc505325 100644
--- a/exosphere/src/configitem.h
+++ b/exosphere/src/configitem.h
@@ -27,4 +27,6 @@ bool configitem_is_recovery_boot(void);
 bool configitem_is_retail(void);
 bool configitem_should_profile_battery(void);
 
+uint64_t configitem_get_hardware_type(void);
+
 #endif
diff --git a/exosphere/src/flow.h b/exosphere/src/flow.h
index 9716aa546..4d7066c69 100644
--- a/exosphere/src/flow.h
+++ b/exosphere/src/flow.h
@@ -16,7 +16,9 @@ static inline uintptr_t get_flow_base(void) {
 #define MAKE_FLOW_REG(ofs) (*((volatile uint32_t *)(FLOW_BASE + ofs)))
 
 #define FLOW_CTLR_HALT_COP_EVENTS_0 MAKE_FLOW_REG(0x004)
+#define FLOW_CTLR_FLOW_DBG_QUAL_0   MAKE_FLOW_REG(0x050)
 #define FLOW_CTLR_L2FLUSH_CONTROL_0 MAKE_FLOW_REG(0x094)
+#define FLOW_CTLR_BPMP_CLUSTER_CONTROL_0 MAKE_FLOW_REG(0x098)
 
 
 static const struct {
diff --git a/exosphere/src/fuse.c b/exosphere/src/fuse.c
index de65e4847..a88b13490 100644
--- a/exosphere/src/fuse.c
+++ b/exosphere/src/fuse.c
@@ -16,6 +16,8 @@ void fuse_wait_idle(void);
 void fuse_init(void)
 {
     fuse_make_regs_visible();
+    fuse_secondary_private_key_disable();
+    fuse_disable_programming();
 
     /* TODO: Overrides (iROM patches) and various reads happen here */
 }
diff --git a/exosphere/src/mc.h b/exosphere/src/mc.h
index 5c5b613b4..f7291f2f4 100644
--- a/exosphere/src/mc.h
+++ b/exosphere/src/mc.h
@@ -12,6 +12,13 @@ static inline uintptr_t get_mc_base(void) {
 
 #define MC_BASE  (get_mc_base())
 
+#define MAKE_MC_REG(n) (*((volatile uint32_t *)(MC_BASE + n)))
+
+#define MC_SECURITY_CFG0_0 MAKE_MC_REG(0x070)
+#define MC_SECURITY_CFG1_0 MAKE_MC_REG(0x074)
+#define MC_SECURITY_CFG3_0 MAKE_MC_REG(0x9BC)
+
+
 #define CARVEOUT_ID_MIN 1
 #define CARVEOUT_ID_MAX 5
 
diff --git a/exosphere/src/misc.h b/exosphere/src/misc.h
new file mode 100644
index 000000000..68016ea76
--- /dev/null
+++ b/exosphere/src/misc.h
@@ -0,0 +1,19 @@
+#ifndef EXOSPHERE_MISC_H
+#define EXOSPHERE_MISC_H
+
+#include <stdint.h>
+
+#include "memory_map.h"
+
+/* Exosphere driver for the Tegra X1 MISC Registers. */
+
+#define MISC_BASE  (MMIO_GET_DEVICE_ADDRESS(MMIO_DEVID_MISC))
+
+#define MAKE_MISC_REG(n) (*((volatile uint32_t *)(MISC_BASE + n)))
+
+
+#define APB_MISC_SECURE_REGS_APB_SLAVE_SECURITY_ENABLE_REG0_0 MAKE_MISC_REG(0x0C00)
+#define APB_MISC_SECURE_REGS_APB_SLAVE_SECURITY_ENABLE_REG1_0 MAKE_MISC_REG(0x0C04)
+#define APB_MISC_SECURE_REGS_APB_SLAVE_SECURITY_ENABLE_REG2_0 MAKE_MISC_REG(0x0C08)
+
+#endif
\ No newline at end of file
diff --git a/exosphere/src/se.c b/exosphere/src/se.c
index e14933d57..b912e7f9d 100644
--- a/exosphere/src/se.c
+++ b/exosphere/src/se.c
@@ -16,6 +16,9 @@ static unsigned int (*g_se_callback)(void);
 static unsigned int g_se_modulus_sizes[KEYSLOT_RSA_MAX];
 static unsigned int g_se_exp_sizes[KEYSLOT_RSA_MAX];
 
+static bool g_se_generated_vector = false;
+static uint8_t g_se_stored_test_vector[0x10];
+
 
 /* Initialize a SE linked list. */
 void ll_init(se_ll_t *ll, void *buffer, size_t size) {
@@ -71,6 +74,35 @@ void se_verify_flags_cleared(void) {
     }
 }
 
+
+void se_generate_test_vector(void *vector) {
+    /* TODO: Implement real test vector generation. */
+    memset(vector, 0, 0x10);
+}
+
+void se_validate_stored_vector(void) {
+    if (!g_se_generated_vector) {
+        generic_panic();
+    }
+
+    uint8_t calc_vector[0x10];
+    se_generate_test_vector(calc_vector);
+    
+    /* Ensure nobody's messed with the security engine while we slept. */
+    if (memcmp(calc_vector, g_se_stored_test_vector, 0x10) != 0) {
+        generic_panic();
+    }
+}
+
+void se_generate_stored_vector(void) {
+    if (g_se_generated_vector) {
+        generic_panic();
+    }
+
+    se_generate_test_vector(g_se_stored_test_vector);
+    g_se_generated_vector = true;
+}
+
 /* Set the flags for an AES keyslot. */
 void set_aes_keyslot_flags(unsigned int keyslot, unsigned int flags) {
     if (keyslot >= KEYSLOT_AES_MAX) {
diff --git a/exosphere/src/se.h b/exosphere/src/se.h
index 279106ae5..fa5feff36 100644
--- a/exosphere/src/se.h
+++ b/exosphere/src/se.h
@@ -173,6 +173,9 @@ void se_check_error_status_reg(void);
 void se_check_for_error(void);
 void se_trigger_interrupt(void);
 
+void se_validate_stored_vector(void);
+void se_generate_stored_vector(void);
+
 void se_verify_flags_cleared(void);
 
 void set_aes_keyslot_flags(unsigned int keyslot, unsigned int flags);
@@ -215,6 +218,7 @@ void se_initialize_rng(unsigned int keyslot);
 void se_generate_random(unsigned int keyslot, void *dst, size_t size);
 
 /* SE context save API. */
+void se_generate_srk(unsigned int srkgen_keyslot);
 void se_set_in_context_save_mode(bool is_context_save_mode);
 void se_generate_random_key(unsigned int dst_keyslot, unsigned int rng_keyslot);
 void se_save_context(unsigned int srk_keyslot, unsigned int rng_keyslot, void *dst);