xamidev/blankos
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 7 Wiki Activity

small multiboot fix

Browse Source
This commit is contained in:
xamidev
2024-08-26 12:57:51 +02:00
parent adcfdc8231
commit 88debf5085
3 changed files with 12 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
README.md
View File

@@ -39,7 +39,7 @@ Tada! You now have a working BlankOS USB stick. Go ahead and try it out!
## Documentation
Two other documents are available to help you understand the project better. One is the User's Manual, labelled [USERS.md](docs/USERS.md), and the other one is the Developer's Manual, labelled [DEVELOPERS.md](docs/DEVELOPERS.md). They are full of useful resources around Blank OS. You'll learn how to use the system and how to contribute to it. *(The docs might not always be up-to-date)*
Two other documents are available to help you understand the project better. One is the User's Manual, labelled [USERS.md](docs/USERS.md), and the other one is the Developer's Manual, labelled [DEVELOPERS.md](docs/DEVELOPERS.md). They are full of useful resources: you'll learn how to use the system and how to contribute to it. *(The docs might not always be up-to-date)*
### Resources
@@ -56,11 +56,12 @@ Two other documents are available to help you understand the project better. One
- [X] Booting with GRUB
- [X] Common basic structures (IDT, GDT, ISRs, IRQs)
- [X] Common drivers (framebuffer, keyboard, serial, timer)
- [X] Common drivers (framebuffer, keyboard, serial, timer, RTC, ATA PIO)
- [X] Kernel-space utilities (shell, simple programs)
- [ ] Filesystem (FAT32 or VFS ramdisk)
- [ ] Changing the default VGA font
- [X] Paging/Page Frame Allocation
- [ ] Dynamic memory allocator (get memmap from GRUB?)
- [ ] Paging/Page Frame Allocation
- [ ] TCP/IP Network stack
- [ ] Getting to Ring-3 (userspace)
- [ ] Multitasking (via round robin scheduling)

4
src/kernel/loader.s
View File

@@ -7,13 +7,14 @@ global loader
section .multiboot_header
mb_start:
align 8
; ASM macros
MAGIC_NUMBER equ 0xe85250d6 ; multiboot2 magic
FLAGS equ 0x0 ; 32-bit protected mode for i386
HEADER_LEN equ 44 ; Tags=2+2+4+4+4+4+2+2+4=28
HEADER_LEN equ mb_end-mb_start
CHECKSUM equ -(MAGIC_NUMBER + FLAGS + HEADER_LEN)
; Multiboot 2 header, according to specification (16bytes)
@@ -42,6 +43,7 @@ CHECKSUM equ -(MAGIC_NUMBER + FLAGS + HEADER_LEN)
dd 8 ; 4
; End of Multiboot 2 header
mb_end:
section .text:

7
src/programs/sysinfo.c
View File

@@ -40,6 +40,7 @@ void get_cpuid()
printf("CPU information\n\tvendor: %s\n\tfamily: %u\n\tmodel: %u\n\tfeatures: 0x%x\n", vendor, family, model, edx);
}
// Not really working anymore as it was made for multiboot1, now using multiboot2
void get_meminfo(unsigned int multiboot_info_address, int verbose)
{
// RAM
@@ -56,13 +57,15 @@ void get_meminfo(unsigned int multiboot_info_address, int verbose)
while ((unsigned int)mmap < multiboot_info_address + *((unsigned int*)(multiboot_info_address + 40)))
{
/*
if (mmap->length_high != 0 && mmap->length_low != 0)
{
{*/
printf("0x%x%x | 0x%x%x | %u\n",
mmap->base_addr_high, mmap->base_addr_low,
mmap->length_high, mmap->length_low,
mmap->type);
}
//}
mmap = (multiboot_memory_map_t*)((unsigned int)mmap + mmap->size + sizeof(unsigned int));
}
}