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Kernel/aarch64: Execute first userspace process

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This adds the necessary code to init.cpp to be able to execute the first
userspace process. To do this, first the filesystem code is initialized,
which will use the ramdisk embedded into the kernel image. Then the
first userspace process, /bin/SystemServer is executed. :^)

The ramdisk code is used as it is useful for the bring-up of the aarch64
port, however once the kernel has support for better ram-based
filesystems, the ramdisk code will be removed again.
This commit is contained in:
Timon Kruiper 2023-01-30 14:17:09 +01:00 • committed by Linus Groh
parent 3b65fd64fc
commit 0f3e1668bb
2 changed files with 29 additions and 32 deletions
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53
Kernel/Arch/aarch64/init.cpp
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@ -24,12 +24,15 @@
#include <Kernel/Arch/aarch64/TrapFrame.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Graphics/Console/BootFramebufferConsole.h>
#include <Kernel/JailManagement.h>
#include <Kernel/KSyms.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Panic.h>
#include <Kernel/Scheduler.h>
#include <Kernel/Storage/StorageManagement.h>
#include <Kernel/TTY/VirtualConsole.h>
typedef void (*ctor_func_t)();
extern ctor_func_t start_heap_ctors[];
@ -65,41 +68,41 @@ ALWAYS_INLINE static Processor& bootstrap_processor()
Atomic<Graphics::Console*> g_boot_console;
VirtualConsole* tty0;
ProcessID g_init_pid { 0 };
static void init_stage2(void*);
void init_stage2(void*)
{
Process::register_new(Process::current());
// This thread is created to show that kernel scheduling is working!
LockRefPtr<Thread> some_work_thread;
(void)Process::create_kernel_process(some_work_thread, MUST(KString::try_create("Some Work Thread"sv)), [] {
Aarch64::Asm::wait_cycles(50000000);
dmesgln("Starting \033[0;31msome work\033[0m:");
for (int i = 1; i <= 500; i++) {
if (i % 20 == 0)
dmesgln(" Working on \033[0;31msome work\033[0m: {}", i);
Aarch64::Asm::wait_cycles(400000);
}
dmesgln("Finished \033[0;31msome work\033[0m!");
});
auto firmware_version = query_firmware_version();
dmesgln("Firmware version: {}", firmware_version);
LockRefPtr<Thread> more_work_thread;
(void)Process::create_kernel_process(more_work_thread, MUST(KString::try_create("More Work Thread"sv)), [] {
dmesgln("Starting \033[0;34mmore work\033[0m:");
for (int i = 1; i <= 300; i++) {
if (i % 20 == 0)
dmesgln(" Working on \033[0;34mmore work\033[0m: {}", i);
VirtualFileSystem::initialize();
Aarch64::Asm::wait_cycles(1000000);
}
dmesgln("Finished \033[0;34mmore work\033[0m!");
});
StorageManagement::the().initialize(kernel_command_line().root_device(), kernel_command_line().is_force_pio(), kernel_command_line().is_nvme_polling_enabled());
if (VirtualFileSystem::the().mount_root(StorageManagement::the().root_filesystem()).is_error()) {
PANIC("VirtualFileSystem::mount_root failed");
}
dmesgln("Finished init stage");
// Switch out of early boot mode.
g_in_early_boot = false;
LockRefPtr<Thread> thread;
auto userspace_init = kernel_command_line().userspace_init();
auto init_args = kernel_command_line().userspace_init_args();
auto init_or_error = Process::try_create_user_process(thread, userspace_init, UserID(0), GroupID(0), move(init_args), {}, tty0);
if (init_or_error.is_error())
PANIC("init_stage2: Error spawning init process: {}", init_or_error.error());
g_init_pid = init_or_error.value()->pid();
thread->set_priority(THREAD_PRIORITY_HIGH);
Process::current().sys$exit(0);
VERIFY_NOT_REACHED();
}
extern "C" [[noreturn]] void init()