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Kernel: Only use multiboot framebuffer details if present

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We should only look at the framebuffer structure members if the
MULTIBOOT_INFO_FRAMEBUFFER_INFO bit is set in the flags field.

Also add some logging if we ignored the fbdev command line argument
due to either not having a framebuffer provided by the bootloader, or
because we don't support the framebuffer format.
This commit is contained in:
Tom 2022-01-05 15:05:09 -07:00 • committed by Linus Groh
parent 785c10fda9
commit 6a4d06e739
3 changed files with 18 additions and 8 deletions
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2
Kernel/Multiboot.h
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@ -46,6 +46,8 @@ struct multiboot_mmap_entry {
} __attribute__((packed));
typedef struct multiboot_mmap_entry multiboot_memory_map_t;
#define MULTIBOOT_INFO_FRAMEBUFFER_INFO (1 << 12)
struct multiboot_info {
// Multiboot info version number.
u32 flags;