5caf964d75
Efiemu * conf/i386-pc.rmk: new modules efiemu, efiemu_acpi, efiemu_pnvram, _linux_efi, linux_efi. new files in grub-emu new targets efiemu32.o and efiemu64.o * loader/linux_normal_efiemu.c: likewise * loader/i386/efi/linux.c: added preliminary efiemu support * util/i386/pc/grub-install.in: add efiemu??.o to the list of files to copy * include/grub/autoefi.h: new file * nclude/grub/i386/efiemu.h: likewise * include/grub/i386/pc/efiemu.h: likewise * include/grub/efi/api.h: add LL suffix when necessary new definitions relating to tables * include/grub/efiemu/efiemu.h: new file * include/grub/efiemu/runtime.h: likewise * efiemu/prepare.c: likewise * efiemu/loadcore_common.c: likewise * efiemu/loadcore64.c: likewise * efiemu/runtime/efiemu.sh: likewise * efiemu/runtime/efiemu.S: likewise * efiemu/runtime/efiemu.c: likewise * efiemu/runtime/config.h: likewise * efiemu/prepare32.c: likewise * efiemu/main.c: likewise * efiemu/modules/pnvram.c: likewise * efiemu/modules/i386: likewise * efiemu/modules/i386/pc: likewise * efiemu/modules/acpi.c: likewise * efiemu/i386/pc/cfgtables.c: likewise * efiemu/i386/loadcore64.c: likewise * efiemu/i386/loadcore32.c: likewise * efiemu/prepare64.c: likewise * efiemu/loadcore.c: likewise * efiemu/symbols.c: likewise * efiemu/mm.c: likewise * efiemu/loadcore32.c: likewise
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/efiemu/efiemu.h>
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#include <grub/machine/efiemu.h>
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#include <grub/command.h>
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#define cpuid(num,a,b,c,d) \
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asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1" \
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: "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
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: "0" (num))
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#define bit_LM (1 << 29)
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char *
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grub_efiemu_get_default_core_name (void)
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{
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unsigned int eax, ebx, ecx, edx;
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unsigned int max_level;
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unsigned int ext_level;
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/* See if we can use cpuid. */
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asm volatile ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;"
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"pushl %0; popfl; pushfl; popl %0; popfl"
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: "=&r" (eax), "=&r" (ebx)
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: "i" (0x00200000));
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if (((eax ^ ebx) & 0x00200000) == 0)
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return "efiemu32.o";
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/* Check the highest input value for eax. */
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cpuid (0, eax, ebx, ecx, edx);
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/* We only look at the first four characters. */
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max_level = eax;
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if (max_level == 0)
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return "efiemu32.o";
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cpuid (0x80000000, eax, ebx, ecx, edx);
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ext_level = eax;
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if (ext_level < 0x80000000)
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return "efiemu32.o";
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cpuid (0x80000001, eax, ebx, ecx, edx);
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return (edx & bit_LM) ? "efiemu64.o" : "efiemu32.o";
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}
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