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Diffstat (limited to 'arch/x86/bios/memory16.S')
| -rw-r--r-- | arch/x86/bios/memory16.S | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/arch/x86/bios/memory16.S b/arch/x86/bios/memory16.S deleted file mode 100644 index e4aef2f256..0000000000 --- a/arch/x86/bios/memory16.S +++ /dev/null @@ -1,54 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* SPDX-FileCopyrightText: 2009 Juergen Beisert, Pengutronix */ - -/* This code was inspired by the GRUB2 project. */ - -/** - * @file - * @brief Query the memory layout information from the BIOS - * - * Note: This function is running in flat and real mode. Due to some - * other restrictions it must running from an address space below 0x10000 - */ - -/** - * @fn unsigned short bios_get_memsize(void) - * @brief Does a BIOS call "INT 15H, AH=88H" to get extended memory size - * @return Extended memory size in KB - * - * @note This call is limited to 64 MiB. So, if the system provides more than - * 64 MiB of memory, still 64 MiB are reported. - * - */ - - - .section .boot.text.bios_get_memsize, "ax" - .code32 - .globl bios_get_memsize - .type bios_get_memsize, @function - - .extern prot_to_real - -bios_get_memsize: - - pushl %ebp - - call prot_to_real /* enter real mode */ - .code16 - - movb $0x88, %ah - int $0x15 - - movw %ax, %dx - - DATA32 call real_to_prot - - .code32 - - movw %dx, %ax - - popl %ebp - ret - - .size bios_get_memsize, .-bios_get_memsize - |