Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 175 insertions, 0 deletions

diff --git a/roms/u-boot/arch/x86/lib/relocate.c b/roms/u-boot/arch/x86/lib/relocate.c
new file mode 100644
index 000000000..6fe515164
--- /dev/null
+++ b/roms/u-boot/arch/x86/lib/relocate.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2008-2011
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ */
+
+#include <common.h>
+#include <log.h>
+#include <relocate.h>
+#include <asm/global_data.h>
+#include <asm/u-boot-x86.h>
+#include <asm/sections.h>
+#include <elf.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int copy_uboot_to_ram(void)
+{
+	size_t len = (uintptr_t)&__data_end - (uintptr_t)&__text_start;
+
+	if (gd->flags & GD_FLG_SKIP_RELOC)
+		return 0;
+	memcpy((void *)gd->relocaddr, (void *)&__text_start, len);
+
+	return 0;
+}
+
+int clear_bss(void)
+{
+	ulong dst_addr = (ulong)&__bss_start + gd->reloc_off;
+	size_t len = (uintptr_t)&__bss_end - (uintptr_t)&__bss_start;
+
+	if (gd->flags & GD_FLG_SKIP_RELOC)
+		return 0;
+	memset((void *)dst_addr, 0x00, len);
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(X86_64)
+static void do_elf_reloc_fixups64(unsigned int text_base, uintptr_t size,
+				  Elf64_Rela *re_src, Elf64_Rela *re_end)
+{
+	Elf64_Addr *offset_ptr_rom, *last_offset = NULL;
+	Elf64_Addr *offset_ptr_ram;
+
+	do {
+		unsigned long long type = ELF64_R_TYPE(re_src->r_info);
+
+		if (type != R_X86_64_RELATIVE) {
+			printf("%s: unsupported relocation type 0x%llx "
+			       "at %p, ", __func__, type, re_src);
+			printf("offset = 0x%llx\n", re_src->r_offset);
+			continue;
+		}
+
+		/* Get the location from the relocation entry */
+		offset_ptr_rom = (Elf64_Addr *)(uintptr_t)re_src->r_offset;
+
+		/* Check that the location of the relocation is in .text */
+		if (offset_ptr_rom >= (Elf64_Addr *)(uintptr_t)text_base &&
+		    offset_ptr_rom > last_offset) {
+			/* Switch to the in-RAM version */
+			offset_ptr_ram = (Elf64_Addr *)((ulong)offset_ptr_rom +
+							gd->reloc_off);
+
+			/* Check that the target points into .text */
+			if (*offset_ptr_ram >= text_base &&
+			    *offset_ptr_ram <= text_base + size) {
+				*offset_ptr_ram = gd->reloc_off +
+							re_src->r_addend;
+			} else {
+				debug("   %p: %lx: rom reloc %lx, ram %p, value %lx, limit %lX\n",
+				      re_src, (ulong)re_src->r_info,
+				      (ulong)re_src->r_offset, offset_ptr_ram,
+				      (ulong)*offset_ptr_ram, text_base + size);
+			}
+		} else {
+			debug("   %p: %lx: rom reloc %lx, last %p\n", re_src,
+			      (ulong)re_src->r_info, (ulong)re_src->r_offset,
+			      last_offset);
+		}
+		last_offset = offset_ptr_rom;
+
+	} while (++re_src < re_end);
+}
+#else
+static void do_elf_reloc_fixups32(unsigned int text_base, uintptr_t size,
+				  Elf32_Rel *re_src, Elf32_Rel *re_end)
+{
+	Elf32_Addr *offset_ptr_rom, *last_offset = NULL;
+	Elf32_Addr *offset_ptr_ram;
+
+	do {
+		unsigned int type = ELF32_R_TYPE(re_src->r_info);
+
+		if (type != R_386_RELATIVE) {
+			printf("%s: unsupported relocation type 0x%x "
+			       "at %p, ", __func__, type, re_src);
+			printf("offset = 0x%x\n", re_src->r_offset);
+			continue;
+		}
+
+		/* Get the location from the relocation entry */
+		offset_ptr_rom = (Elf32_Addr *)(uintptr_t)re_src->r_offset;
+
+		/* Check that the location of the relocation is in .text */
+		if (offset_ptr_rom >= (Elf32_Addr *)(uintptr_t)text_base &&
+		    offset_ptr_rom > last_offset) {
+
+			/* Switch to the in-RAM version */
+			offset_ptr_ram = (Elf32_Addr *)((ulong)offset_ptr_rom +
+							gd->reloc_off);
+
+			/* Check that the target points into .text */
+			if (*offset_ptr_ram >= text_base &&
+			    *offset_ptr_ram <= text_base + size) {
+				*offset_ptr_ram += gd->reloc_off;
+			} else {
+				debug("   %p: rom reloc %x, ram %p, value %x, limit %lX\n",
+				      re_src, re_src->r_offset, offset_ptr_ram,
+				      *offset_ptr_ram, text_base + size);
+			}
+		} else {
+			debug("   %p: rom reloc %x, last %p\n", re_src,
+			       re_src->r_offset, last_offset);
+		}
+		last_offset = offset_ptr_rom;
+
+	} while (++re_src < re_end);
+}
+#endif
+
+/*
+ * This function has more error checking than you might expect. Please see
+ * this commit message for more information:
+ *    62f7970a x86: Add error checking to x86 relocation code
+ */
+int do_elf_reloc_fixups(void)
+{
+	void *re_src = (void *)(&__rel_dyn_start);
+	void *re_end = (void *)(&__rel_dyn_end);
+	uint text_base;
+
+	/* The size of the region of u-boot that runs out of RAM. */
+	uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start;
+
+	if (gd->flags & GD_FLG_SKIP_RELOC)
+		return 0;
+	if (re_src == re_end)
+		panic("No relocation data");
+
+#ifdef CONFIG_SYS_TEXT_BASE
+	text_base = CONFIG_SYS_TEXT_BASE;
+#else
+	panic("No CONFIG_SYS_TEXT_BASE");
+#endif
+#if CONFIG_IS_ENABLED(X86_64)
+	do_elf_reloc_fixups64(text_base, size, re_src, re_end);
+#else
+	do_elf_reloc_fixups32(text_base, size, re_src, re_end);
+#endif
+
+	return 0;
+}