145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <stdnoreturn.h>
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#include <lib/term.h>
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#include <lib/real.h>
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#include <lib/misc.h>
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#include <lib/libc.h>
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#include <lib/part.h>
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#include <lib/config.h>
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#include <lib/trace.h>
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#include <sys/e820.h>
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#include <sys/a20.h>
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#include <sys/idt.h>
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#include <sys/gdt.h>
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#include <lib/print.h>
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#include <fs/file.h>
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#include <lib/elf.h>
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#include <mm/pmm.h>
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#include <menu.h>
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#include <pxe/pxe.h>
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#include <pxe/tftp.h>
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#include <drivers/disk.h>
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#include <sys/lapic.h>
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#include <lib/readline.h>
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void stage3_common(void);
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#if uefi == 1
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__attribute__((naked))
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EFI_STATUS efi_main(
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__attribute__((unused)) EFI_HANDLE ImageHandle,
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__attribute__((unused)) EFI_SYSTEM_TABLE *SystemTable) {
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// Invalid return address of 0 to end stacktraces here
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#if defined (__x86_64__)
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asm (
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"xorl %eax, %eax\n\t"
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"movq %rax, (%rsp)\n\t"
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"jmp uefi_entry\n\t"
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);
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#elif defined (__i386__)
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asm (
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"xorl %eax, %eax\n\t"
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"movl %eax, (%esp)\n\t"
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"jmp uefi_entry\n\t"
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);
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#endif
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}
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extern symbol __image_base;
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noreturn void uefi_entry(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {
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gST = SystemTable;
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gBS = SystemTable->BootServices;
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gRT = SystemTable->RuntimeServices;
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efi_image_handle = ImageHandle;
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EFI_STATUS status;
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status = gBS->SetWatchdogTimer(0, 0x10000, 0, NULL);
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if (status) {
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term_vbe(NULL, 0, 0);
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early_term = true;
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print("WARNING: Failed to disable watchdog timer!\n");
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}
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term_notready();
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init_memmap();
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init_gdt();
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#if defined (__x86_64__)
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if ((uintptr_t)__image_base > 0x100000000) {
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panic(false, "Limine does not support being loaded above 4GiB");
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}
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#endif
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disk_create_index();
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boot_volume = NULL;
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EFI_HANDLE current_handle = ImageHandle;
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for (;;) {
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if (current_handle == NULL) {
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term_vbe(NULL, 0, 0);
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early_term = true;
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print("WARNING: Could not meaningfully match the boot device handle with a volume.\n");
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print(" Using the first volume containing a Limine configuration!\n");
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for (size_t i = 0; i < volume_index_i; i++) {
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struct file_handle *f;
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if ((f = fopen(volume_index[i], "/limine.cfg")) == NULL
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&& (f = fopen(volume_index[i], "/boot/limine.cfg")) == NULL
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&& (f = fopen(volume_index[i], "/EFI/BOOT/limine.cfg")) == NULL) {
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continue;
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}
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fclose(f);
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if (volume_index[i]->backing_dev != NULL) {
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boot_volume = volume_index[i]->backing_dev;
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} else {
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boot_volume = volume_index[i];
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}
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break;
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}
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if (boot_volume != NULL)
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stage3_common();
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panic(false, "No volume contained a Limine configuration file");
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}
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EFI_GUID loaded_img_prot_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
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EFI_LOADED_IMAGE_PROTOCOL *loaded_image = NULL;
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status = gBS->HandleProtocol(current_handle, &loaded_img_prot_guid,
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(void **)&loaded_image);
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if (status) {
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panic(false, "HandleProtocol failure (%x)", status);
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}
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boot_volume = disk_volume_from_efi_handle(loaded_image->DeviceHandle);
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if (boot_volume != NULL)
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stage3_common();
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current_handle = loaded_image->ParentHandle;
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}
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}
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#endif
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noreturn void stage3_common(void) {
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term_notready();
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init_flush_irqs();
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init_io_apics();
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menu(true);
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}
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