project: Initial commit

Signed-off-by: Ian Moffett <ian@osmora.org>

9 files changed, 572 insertions, 0 deletions

diff --git a/sys/arch/amd64/amd64/gdt.c b/sys/arch/amd64/amd64/gdt.c
new file mode 100644
index 0000000..d9b7bf2
--- /dev/null
+++ b/sys/arch/amd64/amd64/gdt.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <machine/gdt.h>
+
+struct gdt_entry g_gdt_data[256] = {
+    /* Null */
+    {0},
+
+    /* Kernel code (0x8) */
+    {
+            .limit          = 0x0000,
+            .base_low       = 0x0000,
+            .base_mid       = 0x00,
+            .access         = 0x9A,
+            .granularity    = 0x20,
+            .base_hi        = 0x00
+    },
+
+    /* Kernel data (0x10) */
+    {
+            .limit          = 0x0000,
+            .base_low       = 0x0000,
+            .base_mid       = 0x00,
+            .access         = 0x92,
+            .granularity    = 0x00,
+            .base_hi        = 0x00
+    },
+
+    /* User code (0x18) */
+    {
+            .limit       = 0x0000,
+            .base_low    = 0x0000,
+            .base_mid    = 0x00,
+            .access      = 0xFA,
+            .granularity = 0xAF,
+            .base_hi     = 0x00
+    },
+
+    /* User data (0x20) */
+    {
+            .limit       = 0x0000,
+            .base_low    = 0x0000,
+            .base_mid    = 0x00,
+            .access      = 0xF2,
+            .granularity = 0x00,
+            .base_hi     = 0x00
+    },
+
+    /* TSS segment (0x28) */
+    {0}
+};
diff --git a/sys/arch/amd64/amd64/idt.c b/sys/arch/amd64/amd64/idt.c
new file mode 100644
index 0000000..a9507fc
--- /dev/null
+++ b/sys/arch/amd64/amd64/idt.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <machine/idt.h>
+#include <machine/gdt.h>
+
+#define LIDT(idtr) __ASMV("lidt %0" :: "m" (idtr))
+
+static struct idt_entry idt[256];
+static struct idtr idtr = {
+    .limit  = sizeof(struct idt_entry) * 256 - 1,
+    .offset = (uintptr_t)&idt[0]
+};
+
+void
+idt_set_desc(uint8_t vector, uint8_t type, uintptr_t isr, uint8_t ist)
+{
+    struct idt_entry *desc;
+
+    if (vector >= 255) {
+        /* Invalid vector */
+        return;
+    }
+
+    desc = &idt[vector];
+    desc->off_lo = isr & 0xFFFF;
+    desc->off_mid = (isr >> 16) & 0xFFFF;
+    desc->off_hi = (isr >> 32) & 0xFFFFFFFF;
+    desc->segsel = KERNEL_CS;
+    desc->type = type;
+    desc->dpl = (type == IDT_USER_INT_GATE) ? 3 : 0;
+    desc->p = 1;
+    desc->zero = 0;
+    desc->zero1 = 0;
+    desc->reserved = 0;
+    desc->ist = 0;
+}
+
+void
+idt_load(void)
+{
+    LIDT(idtr);
+}
diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c
new file mode 100644
index 0000000..19ba28a
--- /dev/null
+++ b/sys/arch/amd64/amd64/machdep.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <machine/cpu.h>
+#include <machine/gdt.h>
+#include <machine/idt.h>
+#include <machine/trap.h>
+#include <machine/asm.h>
+#include <machine/cpuid.h>
+
+static struct cpu_info g_bsp_ci = {0};
+static struct gdtr bsp_gdtr = {
+    .limit = sizeof(struct gdt_entry) * 256 - 1,
+    .offset = (uintptr_t)&g_gdt_data[0]
+};
+
+static void
+setup_vectors(void)
+{
+    idt_set_desc(0x0, IDT_TRAP_GATE, ISR(arith_err), 0);
+    idt_set_desc(0x2, IDT_TRAP_GATE, ISR(nmi), 0);
+    idt_set_desc(0x3, IDT_TRAP_GATE, ISR(breakpoint_handler), 0);
+    idt_set_desc(0x4, IDT_TRAP_GATE, ISR(overflow), 0);
+    idt_set_desc(0x5, IDT_TRAP_GATE, ISR(bound_range), 0);
+    idt_set_desc(0x6, IDT_TRAP_GATE, ISR(invl_op), 0);
+    idt_set_desc(0x8, IDT_TRAP_GATE, ISR(double_fault), 0);
+    idt_set_desc(0xA, IDT_TRAP_GATE, ISR(invl_tss), 0);
+    idt_set_desc(0xB, IDT_TRAP_GATE, ISR(segnp), 0);
+    idt_set_desc(0xC, IDT_TRAP_GATE, ISR(ss_fault), 0);
+    idt_set_desc(0xD, IDT_TRAP_GATE, ISR(general_prot), 0);
+    idt_set_desc(0xE, IDT_TRAP_GATE, ISR(page_fault), 0);
+}
+
+void
+cpu_startup(void)
+{
+    gdt_load(&bsp_gdtr);
+    idt_load();
+
+    setup_vectors();
+    amd64_write_gs_base((uintptr_t)&g_bsp_ci);
+}
diff --git a/sys/arch/amd64/amd64/pio.c b/sys/arch/amd64/amd64/pio.c
new file mode 100644
index 0000000..d4ce688
--- /dev/null
+++ b/sys/arch/amd64/amd64/pio.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <machine/pio.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+uint8_t
+inb(uint16_t port)
+{
+    uint8_t result;
+    __ASMV("in %%dx, %%al" : "=a" (result) : "d" (port));
+    return result;
+}
+
+uint16_t
+inw(uint16_t port)
+{
+    uint16_t val;
+    __ASMV("inw %w1, %w0" : "=a" (val) : "Nd" (port));
+    return val;
+}
+
+uint32_t
+inl(uint16_t port)
+{
+    uint32_t val;
+    __ASMV("inl %w1, %0" : "=a" (val) : "Nd" (port));
+    return val;
+}
+
+void
+outb(uint16_t port, uint8_t val)
+{
+    __ASMV("out %%al, %%dx" : :"a" (val), "d" (port));
+}
+
+void
+outw(uint16_t port, uint16_t val)
+{
+    __ASMV("outw %w0, %w1" : : "a" (val), "Nd" (port));
+}
+
+void
+outl(uint16_t port, uint32_t val)
+{
+    __ASMV("outl %0, %w1" : : "a" (val), "Nd" (port));
+}
diff --git a/sys/arch/amd64/amd64/reboot.c b/sys/arch/amd64/amd64/reboot.c
new file mode 100644
index 0000000..da1b46a
--- /dev/null
+++ b/sys/arch/amd64/amd64/reboot.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/reboot.h>
+#include <sys/param.h>
+#include <sys/cdefs.h>
+#include <machine/pio.h>
+
+__always_inline static inline void
+cpu_halt(void)
+{
+    __ASMV("cli; hlt");
+}
+
+void
+cpu_reboot(int method)
+{
+    if (ISSET(method, REBOOT_HALT)) {
+        cpu_halt();
+    }
+
+    /* Pulse the reset line until the machine goes down */
+    for (;;) {
+        outb(0x64, 0xFE);
+    }
+}
diff --git a/sys/arch/amd64/amd64/trap.S b/sys/arch/amd64/amd64/trap.S
new file mode 100644
index 0000000..fb3ca77
--- /dev/null
+++ b/sys/arch/amd64/amd64/trap.S
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <machine/frameasm.h>
+#include <machine/trap.h>
+
+.macro handle_trap
+    mov %rsp, %rdi
+    call trap_handler
+.endm
+
+    .text
+    .globl breakpoint_handler
+breakpoint_handler:
+    push_trapframe_ec $TRAP_BREAKPOINT
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl arith_err
+arith_err:
+    push_trapframe_ec $TRAP_ARITH_ERR
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl overflow
+overflow:
+    push_trapframe_ec $TRAP_OVERFLOW
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl bound_range
+bound_range:
+    push_trapframe_ec $TRAP_BOUND_RANGE
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl invl_op
+invl_op:
+    push_trapframe_ec $TRAP_INVLOP
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl double_fault
+double_fault:
+    push_trapframe_ec $TRAP_DOUBLE_FAULT
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl invl_tss
+invl_tss:
+    push_trapframe_ec $TRAP_INVLTSS
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl segnp
+segnp:
+    push_trapframe_ec $TRAP_SEGNP
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl general_prot
+general_prot:
+    push_trapframe_ec $TRAP_PROTFLT
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl page_fault
+page_fault:
+    push_trapframe_ec $TRAP_PAGEFLT
+
+    handle_trap
+    cli
+    hlt
+
+    .globl nmi
+nmi:
+    push_trapframe_ec $TRAP_NMI
+
+    handle_trap
+
+    cli
+    hlt
+
+    .globl ss_fault
+ss_fault:
+    push_trapframe_ec $TRAP_SS
+
+    handle_trap
+    cli
+    hlt
diff --git a/sys/arch/amd64/amd64/trap.c b/sys/arch/amd64/amd64/trap.c
new file mode 100644
index 0000000..dcae075
--- /dev/null
+++ b/sys/arch/amd64/amd64/trap.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/reboot.h>
+#include <machine/trap.h>
+#include <machine/frame.h>
+
+void
+trap_handler(struct trapframe *tf)
+{
+    cpu_reboot(REBOOT_HALT);
+}
diff --git a/sys/arch/amd64/conf/GENERIC b/sys/arch/amd64/conf/GENERIC
new file mode 100644
index 0000000..70b786d
--- /dev/null
+++ b/sys/arch/amd64/conf/GENERIC
@@ -0,0 +1 @@
+// TODO
diff --git a/sys/arch/amd64/conf/link.ld b/sys/arch/amd64/conf/link.ld
new file mode 100644
index 0000000..b073054
--- /dev/null
+++ b/sys/arch/amd64/conf/link.ld
@@ -0,0 +1,47 @@
+OUTPUT_FORMAT(elf64-x86-64)
+OUTPUT_ARCH(i386:x86-64)
+ENTRY(main)
+
+PHDRS
+{
+    text          PT_LOAD    FLAGS((1 << 0) | (1 << 2)) ; /* Execute + Read */
+    rodata        PT_LOAD    FLAGS((1 << 2)) ;            /* Read only */
+    data          PT_LOAD    FLAGS((1 << 1) | (1 << 2)) ; /* Write + Read */
+}
+
+SECTIONS
+{
+    . = 0xFFFFFFFF80000000;
+
+    .text : {
+        *(.text .text.*)
+    } :text
+
+    . += CONSTANT(MAXPAGESIZE);
+
+    .rodata : {
+        *(.rodata .rodata.*)
+    } :rodata
+
+    .drivers : {
+        __drivers_init_start = .;
+        *(.drivers .drivers)
+        __drivers_init_end = .;
+    } :rodata
+
+    . += CONSTANT(MAXPAGESIZE);
+
+    .data : {
+        *(.data .data.*)
+    } :data
+
+    .bss : {
+        *(COMMON)
+        *(.bss .bss.*)
+    } :data
+
+    /DISCARD/ : {
+        *(.eh_frame)
+        *(.note .note.*)
+    }
+}