Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / arch / i386 / firmware / pcbios / fakee820.c

diff --git a/qemu/roms/ipxe/src/arch/i386/firmware/pcbios/fakee820.c b/qemu/roms/ipxe/src/arch/i386/firmware/pcbios/fakee820.c
new file mode 100644 (file)
index 0000000..e5f7137
--- /dev/null
+++ b/qemu/roms/ipxe/src/arch/i386/firmware/pcbios/fakee820.c
@@ -0,0 +1,94 @@
+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, 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 );
+}