1 /*
2 * SPDX-License-Identifier: Apache-2.0
3 * Copyright (c) 2019 Intel Corp.
4 */
5
6 #include <zephyr/kernel.h>
7 #include <zephyr/arch/x86/multiboot.h>
8
multiboot(void)9 void multiboot(void)
10 {
11 #ifndef CONFIG_MULTIBOOT_INFO
12 printk("MULTIBOOT: info struct NOT preserved.\n\n");
13 #else
14 /*
15 * If flags == 0, then either we didn't copy the flags from a real
16 * multiboot info struct because the loader didn't provide one, or
17 * (highly unlikely) we DID get a valid struct, but it was empty.
18 */
19
20 if (!multiboot_info.flags) {
21 printk("MULTIBOOT: info struct UNAVAILABLE or EMPTY.\n\n");
22 } else {
23 printk("MULTIBOOT: boot info structure available.\n");
24 printk("\tFlags = 0x%08x\n", multiboot_info.flags);
25 }
26
27 if (multiboot_info.flags & MULTIBOOT_INFO_FLAGS_MEM) {
28 printk("\tBasic memory map: lower = %dK, upper = %dK.\n",
29 multiboot_info.mem_lower,
30 multiboot_info.mem_upper);
31 } else {
32 printk("\tNo basic memory map available.\n");
33 }
34
35 if (multiboot_info.flags & MULTIBOOT_INFO_FLAGS_MMAP) {
36 printk("\tExtended memory map was at 0x%08x (%d bytes).\n",
37 multiboot_info.mmap_addr,
38 multiboot_info.mmap_length);
39 } else {
40 printk("\tNo extended memory map available.\n");
41 }
42
43 if (multiboot_info.flags & MULTIBOOT_INFO_FLAGS_FB) {
44 printk("\tFramebuffer %dbpp %dX%d (pitch %d) @ %08x.\n",
45 multiboot_info.fb_bpp,
46 multiboot_info.fb_width,
47 multiboot_info.fb_height,
48 multiboot_info.fb_pitch,
49 multiboot_info.fb_addr_lo);
50 } else {
51 printk("\tFramebuffer data not present.\n");
52 }
53 #endif
54 printk("\n");
55 }
56
