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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2021-03-23 08:50:34 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-03-25 13:25:51 +0100 |
| commit | d44fdb7d9b8527c758deefc4262fedd6a121ffc6 (patch) | |
| tree | 6d8f2c3218d1c745bda59eb6a9120c7ea6dadf3b /arch/x86/lib/linux_start.S | |
| parent | 41fd0332e797c0a3c6a0d9cbf14e7528f2a3209d (diff) | |
| download | barebox-d44fdb7d9b8527c758deefc4262fedd6a121ffc6.tar.gz barebox-d44fdb7d9b8527c758deefc4262fedd6a121ffc6.tar.xz | |
x86: drop legacy (PC BIOS) boot in favor of EFI
The 16-bit port has experienced bitrot and failed to compile with more
recent linkers for at least a year. Fixing the linker error is insufficient
to restore a barebox that can boot to shell. This continued breakage likely
means that there are no users interested in updating. As new x86 projects
should be using MACH_EFI_GENERIC anyway, retire support for 16-bit legacy
boot (MACH_X86_GENERIC).
Acked-by: Juergen Borleis <jbe@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/x86/lib/linux_start.S')
| -rw-r--r-- | arch/x86/lib/linux_start.S | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/arch/x86/lib/linux_start.S b/arch/x86/lib/linux_start.S deleted file mode 100644 index 07be37fed4..0000000000 --- a/arch/x86/lib/linux_start.S +++ /dev/null @@ -1,55 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* SPDX-FileCopyrightText: 2009 Juergen Beisert, Pengutronix */ -/* SPDX-FileCopyrightText: 1999-2008 Free Software Foundation, Inc. */ - -/* Mostly stolen from the GRUB2 project */ - -/** - * @file - * @brief Start the Linux real mode setup code - * - * Note: These functions are running in flat and real mode. Due to some - * other restrictions these routines must running from an address - * space below 0x10000 - */ - -/* - * void bios_start_linux(unsigned segment) - * - */ - - .section .boot.text.bios_start_linux, "ax" - .code32 - .globl bios_start_linux - .type bios_start_linux, @function - - .extern prot_to_real - -bios_start_linux: - /* 'prot_to_real' eats our eax content */ - movl %eax, %ebx - addl $0x20, %eax - movw %ax, setup_seg - - call prot_to_real - - .code16 - - cli - /* all segment registers are using the same segment */ - movw %bx, %ss - movw %bx, %ds - movw %bx, %es - movw %bx, %fs - movw %bx, %gs - - /* stack for the setup code (end of heap) */ - movw $0x9000, %sp - - /* do an 'ljmp' and never return */ - .byte 0xea - .word 0 -setup_seg: - .word 0 - - .code32 |