605 lines
21 KiB
C
605 lines
21 KiB
C
#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <protos/stivale.h>
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#include <protos/stivale2.h>
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#include <lib/elf.h>
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#include <lib/blib.h>
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#include <lib/acpi.h>
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#include <lib/config.h>
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#include <lib/time.h>
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#include <lib/print.h>
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#include <lib/real.h>
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#include <lib/libc.h>
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#include <lib/gterm.h>
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#include <lib/uri.h>
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#include <sys/smp.h>
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#include <sys/cpu.h>
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#include <lib/fb.h>
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#include <lib/term.h>
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#include <sys/pic.h>
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#include <sys/lapic.h>
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#include <fs/file.h>
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#include <mm/pmm.h>
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#include <stivale/stivale2.h>
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#include <pxe/tftp.h>
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#include <drivers/edid.h>
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#include <drivers/vga_textmode.h>
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#define REPORTED_ADDR(PTR) \
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((PTR) + ((stivale2_hdr.flags & (1 << 1)) ? \
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(want_5lv ? 0xff00000000000000 : 0xffff800000000000) : 0))
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struct stivale2_struct stivale2_struct = {0};
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inline static size_t get_phys_addr(uint64_t addr) {
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if (addr & ((uint64_t)1 << 63))
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return addr - FIXED_HIGHER_HALF_OFFSET_64;
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return addr;
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}
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static void *get_tag(struct stivale2_header *s, uint64_t id) {
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struct stivale2_tag *tag = (void*)get_phys_addr(s->tags);
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for (;;) {
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if (tag == NULL)
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return NULL;
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if (tag->identifier == id)
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return tag;
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tag = (void*)get_phys_addr(tag->next);
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}
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}
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#define append_tag(S, TAG) ({ \
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(TAG)->next = (S)->tags; \
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(S)->tags = REPORTED_ADDR((uint64_t)(uintptr_t)TAG); \
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})
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#if bios == 1
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extern symbol stivale2_term_write_entry;
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#endif
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void stivale2_load(char *config, char *cmdline, bool pxe, void *efi_system_table) {
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struct file_handle *kernel_file = ext_mem_alloc(sizeof(struct file_handle));
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char *kernel_path = config_get_value(config, 0, "KERNEL_PATH");
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if (kernel_path == NULL)
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panic("stivale2: KERNEL_PATH not specified");
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print("stivale2: Loading kernel `%s`...\n", kernel_path);
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if (!uri_open(kernel_file, kernel_path))
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panic("stivale2: Failed to open kernel with path `%s`. Is the path correct?", kernel_path);
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char *kaslr_s = config_get_value(config, 0, "KASLR");
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bool kaslr = true;
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if (kaslr_s != NULL && strcmp(kaslr_s, "no") == 0)
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kaslr = false;
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struct stivale2_header stivale2_hdr;
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bool level5pg = false;
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uint64_t slide = 0;
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uint64_t entry_point = 0;
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struct elf_range *ranges;
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uint64_t ranges_count;
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uint8_t *kernel = freadall(kernel_file, STIVALE2_MMAP_BOOTLOADER_RECLAIMABLE);
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int bits = elf_bits(kernel);
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bool loaded_by_anchor = false;
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if (bits == -1) {
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struct stivale2_anchor *anchor;
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if (!stivale_load_by_anchor((void **)&anchor, "STIVALE2 ANCHOR", kernel, kernel_file->size)) {
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panic("stivale2: Not a valid ELF or anchored file.");
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}
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bits = anchor->bits;
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memcpy(&stivale2_hdr, (void *)(uintptr_t)anchor->phys_stivale2hdr,
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sizeof(struct stivale2_header));
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loaded_by_anchor = true;
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}
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bool want_pmrs = false;
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int ret = 0;
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switch (bits) {
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case 64: {
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// Check if 64 bit CPU
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uint32_t eax, ebx, ecx, edx;
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if (!cpuid(0x80000001, 0, &eax, &ebx, &ecx, &edx) || !(edx & (1 << 29))) {
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panic("stivale2: This CPU does not support 64-bit mode.");
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}
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// Check if 5-level paging is available
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if (cpuid(0x00000007, 0, &eax, &ebx, &ecx, &edx) && (ecx & (1 << 16))) {
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printv("stivale2: CPU has 5-level paging support\n");
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level5pg = true;
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}
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if (!loaded_by_anchor) {
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ret = elf64_load_section(kernel, &stivale2_hdr, ".stivale2hdr",
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sizeof(struct stivale2_header), 0);
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if (ret) {
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goto failed_to_load_header_section;
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}
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if ((stivale2_hdr.flags & (1 << 2))) {
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if (bits == 32) {
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panic("stivale2: PMRs are not supported for 32-bit kernels");
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} else if (loaded_by_anchor) {
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panic("stivale2: PMRs are not supported for anchored kernels");
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}
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want_pmrs = true;
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}
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if (elf64_load(kernel, &entry_point, NULL, &slide,
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STIVALE2_MMAP_KERNEL_AND_MODULES, kaslr, false,
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want_pmrs ? &ranges : NULL,
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want_pmrs ? &ranges_count : NULL))
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panic("stivale2: ELF64 load failure");
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ret = elf64_load_section(kernel, &stivale2_hdr, ".stivale2hdr",
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sizeof(struct stivale2_header), slide);
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}
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break;
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}
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case 32: {
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if (!loaded_by_anchor) {
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if (elf32_load(kernel, (uint32_t *)&entry_point, NULL, 10))
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panic("stivale2: ELF32 load failure");
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ret = elf32_load_section(kernel, &stivale2_hdr, ".stivale2hdr",
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sizeof(struct stivale2_header));
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}
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break;
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}
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default:
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panic("stivale2: Not 32 nor 64-bit kernel. What is this?");
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}
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printv("stivale2: %u-bit kernel detected\n", bits);
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failed_to_load_header_section:
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switch (ret) {
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case 1:
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panic("stivale2: File is not a valid ELF.");
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case 2:
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panic("stivale2: Section .stivale2hdr not found.");
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case 3:
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panic("stivale2: Section .stivale2hdr exceeds the size of the struct.");
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case 4:
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panic("stivale2: Section .stivale2hdr is smaller than size of the struct.");
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}
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if ((stivale2_hdr.flags & (1 << 1)) && bits == 32) {
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panic("stivale2: Higher half addresses header flag not supported in 32-bit mode.");
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}
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bool want_5lv = (get_tag(&stivale2_hdr, STIVALE2_HEADER_TAG_5LV_PAGING_ID) ? true : false) && level5pg;
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if (stivale2_hdr.entry_point != 0)
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entry_point = stivale2_hdr.entry_point;
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if (verbose) {
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print("stivale2: Kernel slide: %X\n", slide);
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print("stivale2: Entry point at: %X\n", entry_point);
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print("stivale2: Requested stack at: %X\n", stivale2_hdr.stack);
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}
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strcpy(stivale2_struct.bootloader_brand, "Limine");
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strcpy(stivale2_struct.bootloader_version, LIMINE_VERSION);
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//////////////////////////////////////////////
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// Create kernel file struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_kernel_file *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_kernel_file));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_KERNEL_FILE_ID;
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tag->kernel_file = REPORTED_ADDR((uint64_t)(uintptr_t)kernel);
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create kernel slide struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_kernel_slide *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_kernel_slide));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_KERNEL_SLIDE_ID;
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tag->kernel_slide = slide;
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create firmware struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_firmware *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_firmware));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_FIRMWARE_ID;
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#if bios == 1
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tag->flags = 1 << 0; // bit 0 = BIOS boot
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#endif
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create modules struct tag
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//////////////////////////////////////////////
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{
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size_t module_count;
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for (module_count = 0; ; module_count++) {
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char *module_file = config_get_value(config, module_count, "MODULE_PATH");
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if (module_file == NULL)
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break;
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}
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struct stivale2_struct_tag_modules *tag =
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ext_mem_alloc(sizeof(struct stivale2_struct_tag_modules)
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+ sizeof(struct stivale2_module) * module_count);
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tag->tag.identifier = STIVALE2_STRUCT_TAG_MODULES_ID;
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tag->module_count = module_count;
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for (size_t i = 0; i < module_count; i++) {
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char *module_path = config_get_value(config, i, "MODULE_PATH");
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struct stivale2_module *m = &tag->modules[i];
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char *module_string = config_get_value(config, i, "MODULE_STRING");
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if (module_string == NULL) {
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m->string[0] = '\0';
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} else {
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// TODO perhaps change this to be a pointer
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size_t str_len = strlen(module_string);
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if (str_len > 127)
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str_len = 127;
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memcpy(m->string, module_string, str_len);
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}
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print("stivale2: Loading module `%s`...\n", module_path);
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struct file_handle f;
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if (!uri_open(&f, module_path))
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panic("stivale2: Failed to open module with path `%s`. Is the path correct?", module_path);
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m->begin = REPORTED_ADDR((uint64_t)(size_t)freadall(&f, STIVALE2_MMAP_KERNEL_AND_MODULES));
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m->end = m->begin + f.size;
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if (verbose) {
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print("stivale2: Requested module %u:\n", i);
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print(" Path: %s\n", module_path);
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print(" String: %s\n", m->string);
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print(" Begin: %X\n", m->begin);
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print(" End: %X\n", m->end);
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}
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}
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create RSDP struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_rsdp *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_rsdp));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_RSDP_ID;
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uint64_t rsdp = (uint64_t)(size_t)acpi_get_rsdp();
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if (rsdp)
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tag->rsdp = REPORTED_ADDR(rsdp);
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create SMBIOS struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_smbios *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_smbios));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_SMBIOS_ID;
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uint64_t smbios_entry_32 = 0, smbios_entry_64 = 0;
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acpi_get_smbios((void **)&smbios_entry_32, (void **)&smbios_entry_64);
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if (smbios_entry_32)
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tag->smbios_entry_32 = REPORTED_ADDR(smbios_entry_32);
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if (smbios_entry_64)
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tag->smbios_entry_64 = REPORTED_ADDR(smbios_entry_64);
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create cmdline struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_cmdline *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_cmdline));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_CMDLINE_ID;
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tag->cmdline = REPORTED_ADDR((uint64_t)(size_t)cmdline);
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create epoch struct tag
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//////////////////////////////////////////////
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{
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struct stivale2_struct_tag_epoch *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_epoch));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_EPOCH_ID;
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tag->epoch = time();
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printv("stivale2: Current epoch: %U\n", tag->epoch);
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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//////////////////////////////////////////////
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// Create framebuffer struct tag
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//////////////////////////////////////////////
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{
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struct fb_info *fb = NULL;
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struct fb_info _fb;
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struct stivale2_header_tag_any_video *avtag = get_tag(&stivale2_hdr, STIVALE2_HEADER_TAG_ANY_VIDEO_ID);
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struct stivale2_header_tag_framebuffer *hdrtag = get_tag(&stivale2_hdr, STIVALE2_HEADER_TAG_FRAMEBUFFER_ID);
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int req_width = 0, req_height = 0, req_bpp = 0;
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if (hdrtag != NULL) {
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req_width = hdrtag->framebuffer_width;
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req_height = hdrtag->framebuffer_height;
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req_bpp = hdrtag->framebuffer_bpp;
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char *resolution = config_get_value(config, 0, "RESOLUTION");
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if (resolution != NULL)
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parse_resolution(&req_width, &req_height, &req_bpp, resolution);
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}
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struct stivale2_header_tag_terminal *terminal_hdr_tag = get_tag(&stivale2_hdr, STIVALE2_HEADER_TAG_TERMINAL_ID);
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if (bits == 64 && terminal_hdr_tag != NULL && hdrtag != NULL) {
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term_vbe(req_width, req_height);
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if (current_video_mode < 0) {
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panic("stivale2: Failed to initialise terminal");
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}
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fb = &fbinfo;
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struct stivale2_struct_tag_terminal *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_terminal));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_TERMINAL_ID;
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// We provide max allowed string length
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tag->flags |= (1 << 1);
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#if bios == 1
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tag->term_write = (uintptr_t)(void *)stivale2_term_write_entry;
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tag->max_length = 4096;
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#elif uefi == 1
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tag->term_write = (uintptr_t)term_write;
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tag->max_length = 0;
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#endif
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// We provide rows and cols
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tag->flags |= (1 << 0);
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tag->cols = term_cols;
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tag->rows = term_rows;
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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goto skip_modeset;
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} else {
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fb = &_fb;
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}
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if (hdrtag != NULL || (avtag != NULL && uefi)
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|| (avtag != NULL && avtag->preference == 0)) {
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term_deinit();
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if (fb_init(fb, req_width, req_height, req_bpp)) {
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skip_modeset:;
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struct stivale2_struct_tag_framebuffer *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_framebuffer));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_FRAMEBUFFER_ID;
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memmap_alloc_range(fb->framebuffer_addr,
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(uint64_t)fb->framebuffer_pitch * fb->framebuffer_height,
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MEMMAP_FRAMEBUFFER, false, false, false, true);
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tag->memory_model = STIVALE2_FBUF_MMODEL_RGB;
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tag->framebuffer_addr = REPORTED_ADDR(fb->framebuffer_addr);
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tag->framebuffer_width = fb->framebuffer_width;
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tag->framebuffer_height = fb->framebuffer_height;
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tag->framebuffer_bpp = fb->framebuffer_bpp;
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tag->framebuffer_pitch = fb->framebuffer_pitch;
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tag->red_mask_size = fb->red_mask_size;
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tag->red_mask_shift = fb->red_mask_shift;
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tag->green_mask_size = fb->green_mask_size;
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tag->green_mask_shift = fb->green_mask_shift;
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tag->blue_mask_size = fb->blue_mask_size;
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tag->blue_mask_shift = fb->blue_mask_shift;
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
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}
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} else {
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#if uefi == 1
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panic("stivale2: Cannot use text mode with UEFI.");
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#elif bios == 1
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int rows, cols;
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init_vga_textmode(&rows, &cols, false);
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struct stivale2_struct_tag_textmode *tmtag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_textmode));
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tmtag->address = 0xb8000;
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tmtag->rows = 25;
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tmtag->cols = 80;
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tmtag->bytes_per_char = 2;
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append_tag(&stivale2_struct, (struct stivale2_tag *)tmtag);
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#endif
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}
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}
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//////////////////////////////////////////////
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// Create EDID struct tag
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//////////////////////////////////////////////
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{
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struct edid_info_struct *edid_info = get_edid_info();
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if (edid_info != NULL) {
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struct stivale2_struct_tag_edid *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_edid) + sizeof(struct edid_info_struct));
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tag->tag.identifier = STIVALE2_STRUCT_TAG_EDID_ID;
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tag->edid_size = sizeof(struct edid_info_struct);
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memcpy(tag->edid_information, edid_info, sizeof(struct edid_info_struct));
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append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
|
|
}
|
|
}
|
|
|
|
#if bios == 1
|
|
//////////////////////////////////////////////
|
|
// Create PXE struct tag
|
|
//////////////////////////////////////////////
|
|
if (pxe) {
|
|
struct stivale2_struct_tag_pxe_server_info *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_pxe_server_info));
|
|
tag->tag.identifier = STIVALE2_STRUCT_TAG_PXE_SERVER_INFO;
|
|
tag->server_ip = get_boot_server_info();
|
|
append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
|
|
}
|
|
#else
|
|
(void)pxe;
|
|
#endif
|
|
|
|
//////////////////////////////////////////////
|
|
// Create PMRs struct tag
|
|
//////////////////////////////////////////////
|
|
{
|
|
if (want_pmrs) {
|
|
struct stivale2_struct_tag_pmrs *tag =
|
|
ext_mem_alloc(sizeof(struct stivale2_struct_tag_pmrs)
|
|
+ ranges_count * sizeof(struct stivale2_pmr));
|
|
|
|
tag->tag.identifier = STIVALE2_STRUCT_TAG_PMRS_ID;
|
|
|
|
tag->entries = ranges_count;
|
|
|
|
memcpy(tag->pmrs, ranges, ranges_count * sizeof(struct stivale2_pmr));
|
|
|
|
append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////
|
|
// Create EFI system table struct tag
|
|
//////////////////////////////////////////////
|
|
{
|
|
if (efi_system_table != NULL) {
|
|
struct stivale2_struct_tag_efi_system_table *tag = ext_mem_alloc(sizeof(struct stivale2_struct_tag_efi_system_table));
|
|
tag->tag.identifier = STIVALE2_STRUCT_TAG_EFI_SYSTEM_TABLE_ID;
|
|
|
|
tag->system_table = REPORTED_ADDR((uint64_t)(uintptr_t)efi_system_table);
|
|
|
|
append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
|
|
}
|
|
}
|
|
|
|
bool unmap_null = get_tag(&stivale2_hdr, STIVALE2_HEADER_TAG_UNMAP_NULL_ID) ? true : false;
|
|
|
|
pagemap_t pagemap = {0};
|
|
if (bits == 64)
|
|
pagemap = stivale_build_pagemap(want_5lv, unmap_null,
|
|
want_pmrs ? ranges : NULL,
|
|
want_pmrs ? ranges_count : 0);
|
|
|
|
#if uefi == 1
|
|
efi_exit_boot_services();
|
|
#endif
|
|
|
|
//////////////////////////////////////////////
|
|
// Create SMP struct tag
|
|
//////////////////////////////////////////////
|
|
{
|
|
struct stivale2_header_tag_smp *smp_hdr_tag = get_tag(&stivale2_hdr, STIVALE2_HEADER_TAG_SMP_ID);
|
|
if (smp_hdr_tag != NULL) {
|
|
struct stivale2_struct_tag_smp *tag;
|
|
struct smp_information *smp_info;
|
|
size_t cpu_count;
|
|
uint32_t bsp_lapic_id;
|
|
smp_info = init_smp(sizeof(struct stivale2_struct_tag_smp), (void **)&tag,
|
|
&cpu_count, &bsp_lapic_id,
|
|
bits == 64, want_5lv,
|
|
pagemap, smp_hdr_tag->flags & 1, want_pmrs);
|
|
|
|
if (smp_info != NULL) {
|
|
tag->tag.identifier = STIVALE2_STRUCT_TAG_SMP_ID;
|
|
tag->bsp_lapic_id = bsp_lapic_id;
|
|
tag->cpu_count = cpu_count;
|
|
tag->flags |= (smp_hdr_tag->flags & 1) && x2apic_check();
|
|
|
|
append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
|
|
}
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////
|
|
// Create memmap struct tag
|
|
//////////////////////////////////////////////
|
|
{
|
|
struct stivale2_struct_tag_memmap *tag =
|
|
ext_mem_alloc(sizeof(struct stivale2_struct_tag_memmap) +
|
|
sizeof(struct e820_entry_t) * 256);
|
|
|
|
// Reserve 32K at 0x70000
|
|
memmap_alloc_range(0x70000, 0x8000, MEMMAP_USABLE, true, true, false, false);
|
|
|
|
size_t mmap_entries;
|
|
struct e820_entry_t *mmap = get_memmap(&mmap_entries);
|
|
|
|
tag->tag.identifier = STIVALE2_STRUCT_TAG_MEMMAP_ID;
|
|
tag->entries = (uint64_t)mmap_entries;
|
|
|
|
memcpy((void*)tag + sizeof(struct stivale2_struct_tag_memmap),
|
|
mmap, sizeof(struct e820_entry_t) * mmap_entries);
|
|
|
|
append_tag(&stivale2_struct, (struct stivale2_tag *)tag);
|
|
}
|
|
|
|
//////////////////////////////////////////////
|
|
// List tags
|
|
//////////////////////////////////////////////
|
|
if (verbose) {
|
|
print("stivale2: Generated tags:\n");
|
|
struct stivale2_tag *taglist =
|
|
(void*)(uintptr_t)(stivale2_struct.tags & (uint64_t)0xffffffff);
|
|
for (size_t i = 0; ; i++) {
|
|
print(" Tag #%u ID: %X\n", i, taglist->identifier);
|
|
if (taglist->next) {
|
|
taglist = (void*)(uintptr_t)(taglist->next & (uint64_t)0xffffffff);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Clear terminal for kernels that will use the stivale2 terminal
|
|
term_write("\e[2J\e[H", 7);
|
|
|
|
stivale_spinup(bits, want_5lv, &pagemap, entry_point,
|
|
REPORTED_ADDR((uint64_t)(uintptr_t)&stivale2_struct),
|
|
stivale2_hdr.stack, want_pmrs);
|
|
}
|