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authorMiguel <m.i@gmx.at>2018-09-03 15:18:16 +0200
committerMiguel <m.i@gmx.at>2018-09-03 15:18:16 +0200
commit7eb87bf3f3fa6226657a7106eb255cbfa97758d2 (patch)
tree2d7d2280d32180d18796999bf7687ebe5bf208df /asm/start.s
parent76b3da6022310dd8edbbbfdf4f73f1696a559853 (diff)
big renaming
Diffstat (limited to 'asm/start.s')
-rw-r--r--asm/start.s87
1 files changed, 0 insertions, 87 deletions
diff --git a/asm/start.s b/asm/start.s
deleted file mode 100644
index ca99c20..0000000
--- a/asm/start.s
+++ /dev/null
@@ -1,87 +0,0 @@
-.global _start
-.global _start_smp
-.global stack_top
-.global stack_bottom
-
-# Fill Multiboot Haeder, init stack and call kernel_main passing two params:
-# eax - magic number
-# ebx - multiboot structure
-
-# Declare constants used for creating a multiboot header.
-.set ALIGN, 1<<0 # align loaded modules on page boundaries
-.set MEMINFO, 1<<1 # provide memory map
-.set GFXINFO, 1<<2 # provide gfx info
-.set FLAGS, ALIGN | MEMINFO | GFXINFO # this is the Multiboot 'flag' field
-.set MAGIC, 0x1BADB002 # 'magic number' lets bootloader find the header
-.set CHECKSUM, -(MAGIC + FLAGS) # checksum of above, to prove we are multiboot
-
-# entry point for application processors we will copy this to 0x7000 later
-
-.section .smp
-.code16
-_start_smp:
-call smp_start # TODO: align later before going C
-
-
-# Declare a header as in the Multiboot Standard. We put this into a special
-# section so we can force the header to be in the start of the final program.
-# You don't need to understand all these details as it is just magic values that
-# is documented in the multiboot standard. The bootloader will search for this
-# magic sequence and recognize us as a multiboot kernel.
-
-.section .multiboot
-.code32
-.align 4
-.long MAGIC
-.long FLAGS
-.long CHECKSUM
-
-.long 0 # we dont need this for ELF
-.long 0
-.long 0
-.long 0
-.long 0
-
-# we override this from grub anyway
-.long 0 #gfx_stuff 0=enable!
-.long 640
-.long 480
-.long 32
-
-# Currently the stack pointer register (esp) points at anything and using it may
-# cause massive harm. Instead, we'll provide our own stack. We will allocate
-# room for a small temporary stack by creating a symbol at the bottom of it,
-# then allocating 16384 bytes for it, and finally creating a symbol at the top.
-.section .bootstrap_stack, "aw", @nobits
-stack_bottom:
-.skip 16384 # 16 KiB
-stack_top:
-
-# The linker script specifies _start as the entry point to the kernel and the
-# bootloader will jump to this position once the kernel has been loaded. It
-# doesn't make sense to return from this function as the bootloader is gone.
-.section .text
-
-_start:
-
- # To set up a stack, we simply set the esp register to point to the top of
- # our stack (as it grows downwards).
- movl $stack_top, %esp
-
- sub $8, %esp #to align on 16byte before calling C
- push %ebx #pass address of the multiboot information data structure
- push %eax #pass eax, so kernel can check for magic number
-
- call kernel_main
-
- # turn off interrupts and halt.
- # this should never be reached
- cli
- hlt
-
-.Lhang:
- jmp .Lhang
-
-# Set the size of the _start symbol to the current location '.' minus its start.
-# This is useful when debugging or when you implement call tracing.
-.size _start, . - _start