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| author | Danny Holman <dholman@gymli.xyz> | 2021-07-24 02:27:40 -0500 |
|---|---|---|
| committer | Danny Holman <dholman@gymli.xyz> | 2021-07-24 02:27:40 -0500 |
| commit | 7498b41d94b2f34468833b55ad0472d75b63064e (patch) | |
| tree | a16b9c728edd4116b401f7fd337cb36b8d33fd78 /arch/i386/boot/boot.s | |
| parent | arch: i386: move the kernel to high memory (diff) | |
| download | box-7498b41d94b2f34468833b55ad0472d75b63064e.tar.gz box-7498b41d94b2f34468833b55ad0472d75b63064e.tar.zst box-7498b41d94b2f34468833b55ad0472d75b63064e.zip | |
arch: i386: add GDT setup routines
Add a set of routines that setup the x86's global descriptor table.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
Diffstat (limited to '')
| -rw-r--r-- | arch/i386/boot/boot.s | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/i386/boot/boot.s b/arch/i386/boot/boot.s index 792a790..842519f 100644 --- a/arch/i386/boot/boot.s +++ b/arch/i386/boot/boot.s @@ -68,8 +68,26 @@ _start: movl $stack_top, %esp + call tty_init + call gdt_install call kernel_main cli 1: hlt jmp 1b + +.global flush_gdt +.type flush_gdt, @function + +flush_gdt: + cli + movl 4(%esp), %eax + lgdt (%eax) + movw $0x10, %ax + movw %ax, %ds + movw %ax, %es + movw %ax, %fs + movw %ax, %gs + movw %ax, %ss + jmp $0x08, $.flush +.flush: ret |