129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.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 <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 <protos/linux.h>
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#include <protos/chainload.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/idt.h>
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#include <sys/cpu.h>
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struct volume *boot_volume;
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#if defined (BIOS)
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bool stage3_loaded = false;
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static bool stage3_found = false;
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extern symbol stage3_addr;
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extern symbol limine_bios_sys_size;
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extern symbol build_id_s2;
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extern symbol build_id_s3;
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static bool stage3_init(struct volume *part) {
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struct file_handle *stage3;
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bool old_cif = case_insensitive_fopen;
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case_insensitive_fopen = true;
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if ((stage3 = fopen(part, "/limine-bios.sys")) == NULL
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&& (stage3 = fopen(part, "/limine/limine-bios.sys")) == NULL
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&& (stage3 = fopen(part, "/boot/limine-bios.sys")) == NULL
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&& (stage3 = fopen(part, "/boot/limine/limine-bios.sys")) == NULL) {
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case_insensitive_fopen = old_cif;
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return false;
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}
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case_insensitive_fopen = old_cif;
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stage3_found = true;
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if (stage3->size != (size_t)limine_bios_sys_size) {
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print("limine-bios.sys size incorrect.\n");
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return false;
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}
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fread(stage3, stage3_addr,
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(uintptr_t)stage3_addr - 0xf000,
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stage3->size - ((uintptr_t)stage3_addr - 0xf000));
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fclose(stage3);
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if (memcmp(build_id_s2 + 16, build_id_s3 + 16, 20) != 0) {
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print("limine-bios.sys build ID mismatch.\n");
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return false;
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}
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stage3_loaded = true;
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return true;
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}
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enum {
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BOOTED_FROM_HDD = 0,
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BOOTED_FROM_PXE = 1,
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BOOTED_FROM_CD = 2
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};
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noreturn void entry(uint8_t boot_drive, int boot_from) {
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// XXX DO NOT MOVE A20 ENABLE CALL
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if (!a20_enable()) {
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panic(false, "Could not enable A20 line");
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}
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init_e820();
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init_memmap();
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init_idt();
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disk_create_index();
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if (boot_from == BOOTED_FROM_HDD || boot_from == BOOTED_FROM_CD) {
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boot_volume = volume_get_by_bios_drive(boot_drive);
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} else if (boot_from == BOOTED_FROM_PXE) {
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pxe_init();
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boot_volume = pxe_bind_volume();
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}
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if (boot_volume == NULL) {
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panic(false, "Could not determine boot drive");
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}
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volume_iterate_parts(boot_volume,
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if (stage3_init(_PART)) {
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break;
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}
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);
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if (!stage3_found) {
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print("\n"
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"!! Stage 3 file not found!\n"
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"!! Have you copied limine-bios.sys to the root, /boot, /limine, or /boot/limine\n"
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"!! directories of one of the partitions on the boot device?\n\n");
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}
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if (!stage3_loaded) {
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panic(false, "Failed to load stage 3.");
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}
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term_fallback();
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stage3_common();
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}
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#endif
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