diff options
Diffstat (limited to 'gpxe/src/arch/i386/firmware/pcbios/fakee820.c')
| -rw-r--r-- | gpxe/src/arch/i386/firmware/pcbios/fakee820.c | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/gpxe/src/arch/i386/firmware/pcbios/fakee820.c b/gpxe/src/arch/i386/firmware/pcbios/fakee820.c deleted file mode 100644 index ea116fe5..00000000 --- a/gpxe/src/arch/i386/firmware/pcbios/fakee820.c +++ /dev/null @@ -1,93 +0,0 @@ -/* Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <realmode.h> -#include <biosint.h> - -/** Assembly routine in inline asm */ -extern void int15_fakee820(); - -/** Original INT 15 handler */ -static struct segoff __text16 ( real_int15_vector ); -#define real_int15_vector __use_text16 ( real_int15_vector ) - -/** An INT 15,e820 memory map entry */ -struct e820_entry { - /** Start of region */ - uint64_t start; - /** Length of region */ - uint64_t len; - /** Type of region */ - uint32_t type; -} __attribute__ (( packed )); - -#define E820_TYPE_RAM 1 /**< Normal memory */ -#define E820_TYPE_RSVD 2 /**< Reserved and unavailable */ -#define E820_TYPE_ACPI 3 /**< ACPI reclaim memory */ -#define E820_TYPE_NVS 4 /**< ACPI NVS memory */ - -/** Fake e820 map */ -static struct e820_entry __text16_array ( e820map, [] ) __used = { - { 0x00000000ULL, ( 0x000a0000ULL - 0x00000000ULL ), E820_TYPE_RAM }, - { 0x00100000ULL, ( 0xcfb50000ULL - 0x00100000ULL ), E820_TYPE_RAM }, - { 0xcfb50000ULL, ( 0xcfb64000ULL - 0xcfb50000ULL ), E820_TYPE_RSVD }, - { 0xcfb64000ULL, ( 0xcfb66000ULL - 0xcfb64000ULL ), E820_TYPE_RSVD }, - { 0xcfb66000ULL, ( 0xcfb85c00ULL - 0xcfb66000ULL ), E820_TYPE_ACPI }, - { 0xcfb85c00ULL, ( 0xd0000000ULL - 0xcfb85c00ULL ), E820_TYPE_RSVD }, - { 0xe0000000ULL, ( 0xf0000000ULL - 0xe0000000ULL ), E820_TYPE_RSVD }, - { 0xfe000000ULL, (0x100000000ULL - 0xfe000000ULL ), E820_TYPE_RSVD }, - {0x100000000ULL, (0x230000000ULL -0x100000000ULL ), E820_TYPE_RAM }, -}; -#define e820map __use_text16 ( e820map ) - -void fake_e820 ( void ) { - __asm__ __volatile__ ( - TEXT16_CODE ( "\nint15_fakee820:\n\t" - "pushfw\n\t" - "cmpl $0xe820, %%eax\n\t" - "jne 99f\n\t" - "cmpl $0x534d4150, %%edx\n\t" - "jne 99f\n\t" - "pushaw\n\t" - "movw %%sp, %%bp\n\t" - "andb $~0x01, 22(%%bp)\n\t" /* Clear return CF */ - "leaw e820map(%%bx), %%si\n\t" - "cs rep movsb\n\t" - "popaw\n\t" - "movl %%edx, %%eax\n\t" - "addl $20, %%ebx\n\t" - "cmpl %0, %%ebx\n\t" - "jne 1f\n\t" - "xorl %%ebx,%%ebx\n\t" - "\n1:\n\t" - "popfw\n\t" - "iret\n\t" - "\n99:\n\t" - "popfw\n\t" - "ljmp *%%cs:real_int15_vector\n\t" ) - : : "i" ( sizeof ( e820map ) ) ); - - hook_bios_interrupt ( 0x15, ( unsigned int ) int15_fakee820, - &real_int15_vector ); -} - -void unfake_e820 ( void ) { - unhook_bios_interrupt ( 0x15, ( unsigned int ) int15_fakee820, - &real_int15_vector ); -} |