1 files changed, 34 insertions, 0 deletions
diff --git a/src/arch/x86/bootblock.ld b/src/arch/x86/bootblock.ld
new file mode 100644
index 0000000000..12f932c2dc
--- /dev/null
+++ b/src/arch/x86/bootblock.ld
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+gdtptr16_offset = gdtptr16 & 0xffff;
+nullidt_offset = nullidt & 0xffff;
+
+/* Symbol _start16bit must be aligned to 4kB to start AP CPUs with
+ * Startup IPI message without RAM.
+ */
+#if CONFIG(SIPI_VECTOR_IN_ROM)
+_bogus = ASSERT((_start16bit & 0xfff) == 0, "Symbol _start16bit is not at 4 KiB boundary");
+ap_sipi_vector_in_rom = (_start16bit >> 12) & 0xff;
+#endif
+
+SECTIONS {
+	/* Trigger an error if I have an unusable start address */
+	_bogus = ASSERT(_start16bit >= 0xffff0000, "_start16bit too low. Please report.");
+
+	. = (0xffffffff - CONFIG_ID_SECTION_OFFSET) - (__id_end - __id_start) + 1;
+	.id (.): {
+		KEEP(*(.id));
+	}
+
+	. = 0xffffffc0;
+	.fit_pointer (.): {
+		KEEP(*(.fit_pointer));
+	}
+
+	. = 0xfffffff0;
+	.reset . : {
+		*(.reset);
+		. = 15;
+		BYTE(0x00);
+	}
+}