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-rw-r--r--src/arch/x86/failover.ld70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/arch/x86/failover.ld b/src/arch/x86/failover.ld
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index 0000000000..d7aa47e249
--- /dev/null
+++ b/src/arch/x86/failover.ld
@@ -0,0 +1,70 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2006 Advanced Micro Devices, Inc.
+ * Copyright (C) 2008-2010 coresystems GmbH
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+MEMORY {
+ rom : ORIGIN = 0xffff0000, LENGTH = 64K
+}
+
+TARGET(binary)
+SECTIONS
+{
+ /* Symbol ap_sipi_vector must be aligned to 4kB to start AP CPUs
+ * with Startup IPI message without RAM. Align .rom to next 4 byte
+ * boundary anyway, so no pad byte appears between _rom and _start.
+ */
+ .bogus ROMLOC_MIN : {
+ . = CONFIG_SIPI_VECTOR_IN_ROM ? ALIGN(4096) : ALIGN(4);
+ ROMLOC = .;
+ } >rom = 0xff
+
+ /* This section might be better named .setup */
+ .rom ROMLOC : {
+ _rom = .;
+ ap_sipi_vector = .;
+ *(.rom.text);
+ *(.rom.data);
+ *(.rom.data.*);
+ *(.rodata.*);
+ _erom = .;
+ } >rom = 0xff
+
+ /* Allocation reserves extra 16 bytes here. Alignment requirements
+ * may cause the total size of a section to change when the start
+ * address gets applied.
+ */
+ ROMLOC_MIN = 0xffffff00 - (_erom - _rom + 16) -
+ (CONFIG_SIPI_VECTOR_IN_ROM ? 4096 : 0);
+
+ /* Post-check proper SIPI vector. */
+ _bogus = ASSERT(!CONFIG_SIPI_VECTOR_IN_ROM || ((ap_sipi_vector & 0x0fff) == 0x0),
+ "Bad SIPI vector alignment");
+ _bogus = ASSERT(!CONFIG_SIPI_VECTOR_IN_ROM || (ap_sipi_vector == CONFIG_AP_SIPI_VECTOR),
+ "Address mismatch on AP_SIPI_VECTOR");
+
+ /DISCARD/ : {
+ *(.comment)
+ *(.note)
+ *(.comment.*)
+ *(.note.*)
+ *(.iplt)
+ *(.rel.*)
+ *(.igot.*)
+ }
+}