kernel/aarch64: Add initial AARCH64 portaarch64

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

9 files changed, 486 insertions, 0 deletions

diff --git a/sys/arch/aarch64/aarch64/acpi_machdep.c b/sys/arch/aarch64/aarch64/acpi_machdep.c
new file mode 100644
index 0000000..f077de3
--- /dev/null
+++ b/sys/arch/aarch64/aarch64/acpi_machdep.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2023-2025 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 <dev/acpi/acpi.h>
+#include <dev/acpi/acpivar.h>
+
+int
+acpi_init_madt(void)
+{
+    return 0;
+}
diff --git a/sys/arch/aarch64/aarch64/machdep.c b/sys/arch/aarch64/aarch64/machdep.c
new file mode 100644
index 0000000..1d34e56
--- /dev/null
+++ b/sys/arch/aarch64/aarch64/machdep.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2023-2025 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/syslog.h>
+#include <sys/panic.h>
+#include <machine/cpu.h>
+
+struct cpu_info g_bsp_ci = {0};
+
+void
+cpu_startup(struct cpu_info *ci)
+{
+    /* TODO: STUB */
+    return;
+}
+
+void
+serial_init(void)
+{
+    /* TODO: STUB */
+    return;
+}
+
+void
+md_backtrace(void)
+{
+    /* TODO: STUB */
+    return;
+}
+
+void
+serial_putc(char c)
+{
+    /* TODO: STUB */
+    return;
+}
+
+/*
+ * Get the descriptor for the currently
+ * running processor.
+ */
+struct cpu_info *
+this_cpu(void)
+{
+    struct cpu_info *ci;
+
+    __ASMV("mrs %0, tpidr_el0" : "=r" (ci));
+    return ci;
+}
diff --git a/sys/arch/aarch64/aarch64/mp.c b/sys/arch/aarch64/aarch64/mp.c
new file mode 100644
index 0000000..4e07566
--- /dev/null
+++ b/sys/arch/aarch64/aarch64/mp.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023-2025 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>
+
+#define pr_trace(fmt, ...) kprintf("cpu_mp: " fmt, ##__VA_ARGS__)
+
+void
+mp_bootstrap_aps(struct cpu_info *ci)
+{
+    for (;;);
+}
diff --git a/sys/arch/aarch64/aarch64/pmap.c b/sys/arch/aarch64/aarch64/pmap.c
new file mode 100644
index 0000000..b5ebda9
--- /dev/null
+++ b/sys/arch/aarch64/aarch64/pmap.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2023-2025 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/vas.h>
+#include <vm/pmap.h>
+
+struct vas
+pmap_read_vas(void)
+{
+    /* TODO: STUB */
+    struct vas vas = {0};
+    return vas;
+}
+
+void
+pmap_switch_vas(struct vas vas)
+{
+    /* TODO: STUB */
+    return;
+}
+
+int
+pmap_map(struct vas vas, vaddr_t va, paddr_t pa, vm_prot_t prot)
+{
+    /* TODO: STUB */
+    return 0;
+}
+
+int
+pmap_unmap(struct vas vas, vaddr_t va)
+{
+    /* TODO: STUB */
+    return 0;
+}
+
+void
+pmap_destroy_vas(struct vas vas)
+{
+    /* TODO: STUB */
+    return;
+}
diff --git a/sys/arch/aarch64/aarch64/proc_machdep.c b/sys/arch/aarch64/aarch64/proc_machdep.c
new file mode 100644
index 0000000..97902e5
--- /dev/null
+++ b/sys/arch/aarch64/aarch64/proc_machdep.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2023-2025 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/proc.h>
+
+/*
+ * MD thread init code
+ *
+ * @p: New process.
+ * @parent: Parent of new process.
+ * @ip: Instruction pointer.
+ */
+int
+md_fork(struct proc *p, struct proc *parent, uintptr_t ip)
+{
+    /* TODO: STUB */
+    return 0;
+}
+
+void
+md_td_stackinit(struct proc *td, void *stack_top, struct exec_prog *prog)
+{
+    /* TODO: STUB */
+    return;
+}
+
+void
+setregs(struct proc *td, struct exec_prog *prog, uintptr_t stack)
+{
+    /* TODO: STUB */
+    return;
+}
+
+/*
+ * Startup a user thread.
+ *
+ * @td: Thread to start up.
+ */
+void
+md_td_kick(struct proc *td)
+{
+    /* TODO: STUB */
+    for (;;);
+}
diff --git a/sys/arch/aarch64/aarch64/reboot.c b/sys/arch/aarch64/aarch64/reboot.c
new file mode 100644
index 0000000..6d82133
--- /dev/null
+++ b/sys/arch/aarch64/aarch64/reboot.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2023-2025 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>
+
+void
+cpu_reboot(int method)
+{
+    /* TODO: STUB */
+    for (;;);
+}
diff --git a/sys/arch/aarch64/conf/GENERIC b/sys/arch/aarch64/conf/GENERIC
new file mode 100644
index 0000000..5691685
--- /dev/null
+++ b/sys/arch/aarch64/conf/GENERIC
@@ -0,0 +1,5 @@
+// Kernel options
+option SERIAL_DEBUG yes
+
+// Kernel constants
+setval SCHED_NQUEUE 4
diff --git a/sys/arch/aarch64/conf/link.ld b/sys/arch/aarch64/conf/link.ld
new file mode 100644
index 0000000..c64cec3
--- /dev/null
+++ b/sys/arch/aarch64/conf/link.ld
@@ -0,0 +1,75 @@
+/* Tell the linker that we want an aarch64 ELF64 output file */
+OUTPUT_FORMAT(elf64-littleaarch64)
+OUTPUT_ARCH(aarch64)
+
+/* We want the symbol main to be our entry point */
+ENTRY(main)
+
+/* Define the program headers we want so the bootloader gives us the right */
+/* MMU permissions */
+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 */
+    dynamic PT_DYNAMIC FLAGS((1 << 1) | (1 << 2)) ; /* Dynamic PHDR for relocations */
+}
+
+SECTIONS
+{
+    /* We wanna be placed in the topmost 2GiB of the address space, for optimisations */
+    /* and because that is what the Limine spec mandates. */
+    /* Any address in this region will do, but often 0xffffffff80000000 is chosen as */
+    /* that is the beginning of the region. */
+    . = 0xffffffff80000000;
+
+    .text : {
+        *(.text .text.*)
+    } :text
+
+    /* Move to the next memory page for .rodata */
+    . += CONSTANT(MAXPAGESIZE);
+
+    .rodata : {
+        *(.rodata .rodata.*)
+    } :rodata
+
+    .drivers : {
+        __drivers_init_start = .;
+        *(.drivers .drivers)
+        __drivers_init_end = .;
+    } :rodata
+
+    /* Move to the next memory page for .data */
+    . += CONSTANT(MAXPAGESIZE);
+
+    .data : {
+        *(.data .data.*)
+    } :data
+
+    /* Dynamic section for relocations, both in its own PHDR and inside data PHDR */
+    .dynamic : {
+        *(.dynamic)
+    } :data :dynamic
+
+    /* NOTE: .bss needs to be the last thing mapped to :data, otherwise lots of */
+    /* unnecessary zeros will be written to the binary. */
+    /* If you need, for example, .init_array and .fini_array, those should be placed */
+    /* above this. */
+    .bss : {
+        *(.bss .bss.*)
+        *(COMMON)
+    } :data
+
+    /* -- Cache line alignment -- */
+    . = ALIGN(64);
+    .data.cacheline_aligned : {
+        *(.data.cacheline_aligned)
+    }
+
+    /* Discard .note.* and .eh_frame since they may cause issues on some hosts. */
+    /DISCARD/ : {
+        *(.eh_frame)
+        *(.note .note.*)
+    }
+}
diff --git a/sys/arch/aarch64/pci/pci_machdep.c b/sys/arch/aarch64/pci/pci_machdep.c
new file mode 100644
index 0000000..fa92165
--- /dev/null
+++ b/sys/arch/aarch64/pci/pci_machdep.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2023-2025 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 <dev/pci/pci.h>
+
+pcireg_t
+pci_readl(struct pci_device *dev, uint32_t offset)
+{
+    /* TODO: STUB */
+    return 0;
+}
+
+void
+pci_writel(struct pci_device *dev, uint32_t offset, pcireg_t val)
+{
+    /* TODO: STUB */
+    return;
+}
+
+/*
+ * Map a BAR into kernel memory.
+ *
+ * @dev: Device of BAR to map.
+ * @barno: BAR number to map.
+ * @vap: Resulting virtual address.
+ */
+int
+pci_map_bar(struct pci_device *dev, uint8_t barno, void **vap)
+{
+    /* TODO: STUB */
+    return 0;
+}
+
+void
+pci_msix_eoi(void)
+{
+    return;
+}
+
+/*
+ * Enable MSI-X for a device and allocate an
+ * interrupt vector.
+ *
+ * @dev: Device to enable MSI-X for.
+ * @intr: MSI-X interrupt descriptor.
+ */
+int
+pci_enable_msix(struct pci_device *dev, const struct msi_intr *intr)
+{
+    /* TODO: STUB */
+    return 0;
+}