ARM bootblock approach

This lays out the groundwork for using a proper bootblock on ARM.
Currently we bypass the bootblock entirely and go straight to
romstage. However we want to utilize CBFS to maximize flexibility
of placing code without relying on a lot of magic numbers which
will break depending on the SoC in use.

Change-Id: I9cc2a8191d2db38b27b6363ba673e5a360de9684
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2118
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

2 files changed, 75 insertions, 63 deletions

diff --git a/src/arch/armv7/include/arch/cbfs.h b/src/arch/armv7/include/arch/cbfs.h
new file mode 100644
index 0000000000..0affa5e5d3
--- /dev/null
+++ b/src/arch/armv7/include/arch/cbfs.h
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 The ChromiumOS Authors.  All rights reserved.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __INCLUDE_ARCH_CBFS__
+#define __INCLUDE_ARCH_CBFS__
+
+#include <string.h>
+#include <types.h>
+#include <cbfs_core.h>
+#include <arch/byteorder.h>
+#include <arch/cbfs.h>
+
+static int cbfs_check_magic(struct cbfs_file *file)
+{
+	return !strcmp(file->magic, CBFS_FILE_MAGIC) ? 1 : 0;
+}
+
+static unsigned long findstage(const char* target)
+{
+	unsigned long offset, align;
+	/* FIXME: magic offsets */
+	struct cbfs_header *header = (struct cbfs_header *)(0x02023400 + 0x40);
+	// if (ntohl(header->magic) != CBFS_HEADER_MAGIC)
+	// 	printk(BIOS_ERR, "ERROR: No valid CBFS header found!\n");
+
+	offset = ntohl(header->offset);
+	align = ntohl(header->align);
+	while(1) {
+		struct cbfs_file *file;
+		file = (struct cbfs_file *)(offset + CONFIG_ROMSTAGE_BASE);
+		if (!cbfs_check_magic(file))
+			return 0;
+		if (!strcmp(CBFS_NAME(file), target))
+			return (unsigned long)CBFS_SUBHEADER(file);
+		int flen = ntohl(file->len);
+		int foffset = ntohl(file->offset);
+		unsigned long oldoffset = offset;
+		offset = ALIGN(offset + foffset + flen, align);
+		if (offset <= oldoffset)
+			return 0;
+		if (offset < CONFIG_ROMSTAGE_BASE + ntohl(header->romsize));
+			return 0;
+	}
+}
+
+static inline void call(unsigned long addr)
+{
+	void (*doit)(void) = (void *)addr;
+	doit();
+}
+#endif
diff --git a/src/arch/armv7/include/bootblock_common.h b/src/arch/armv7/include/bootblock_common.h
index f5c712945d..39af4535e2 100644
--- a/src/arch/armv7/include/bootblock_common.h
+++ b/src/arch/armv7/include/bootblock_common.h
@@ -1,69 +1,14 @@
-#include <types.h>
-#include <cbfs.h>
-#include <string.h>
-#include <arch/byteorder.h>
-
-
-#define boot_cpu(x) 1
-
 #ifdef CONFIG_BOOTBLOCK_CPU_INIT
 #include CONFIG_BOOTBLOCK_CPU_INIT
-#else
-static void bootblock_cpu_init(void) { }
-#endif
-#ifdef CONFIG_BOOTBLOCK_NORTHBRIDGE_INIT
-#include CONFIG_BOOTBLOCK_NORTHBRIDGE_INIT
-#else
-static void bootblock_northbridge_init(void) { }
 #endif
-#ifdef CONFIG_BOOTBLOCK_SOUTHBRIDGE_INIT
-#include CONFIG_BOOTBLOCK_SOUTHBRIDGE_INIT
-#else
-static void bootblock_southbridge_init(void) { }
-#endif
-
-static int cbfs_check_magic(struct cbfs_file *file)
-{
-	return !strcmp(file->magic, CBFS_FILE_MAGIC) ? 1 : 0;
-}
-
-static unsigned long findstage(const char* target)
-{
-	unsigned long offset;
-
-	void *ptr = (void *)*((unsigned long *) CBFS_HEADPTR_ADDR);
-	struct cbfs_header *header = (struct cbfs_header *) ptr;
-	// if (ntohl(header->magic) != CBFS_HEADER_MAGIC)
-	// 	printk(BIOS_ERR, "ERROR: No valid CBFS header found!\n");
-
-	offset = 0 - ntohl(header->romsize) + ntohl(header->offset);
-	int align = ntohl(header->align);
-	while(1) {
-		struct cbfs_file *file = (struct cbfs_file *) offset;
-		if (!cbfs_check_magic(file))
-			return 0;
-		if (!strcmp(CBFS_NAME(file), target))
-			return (unsigned long)CBFS_SUBHEADER(file);
-		int flen = ntohl(file->len);
-		int foffset = ntohl(file->offset);
-		unsigned long oldoffset = offset;
-		offset = ALIGN(offset + foffset + flen, align);
-		if (offset <= oldoffset)
-			return 0;
-		if (offset < 0xFFFFFFFF - ntohl(header->romsize))
-			return 0;
-	}
-}
-
-
-static void call(unsigned long addr, unsigned long bist)
-{
-	asm volatile ("mov r0, %1\nbx %0\n" : : "r" (addr), "r" (bist));
-}
 
-static void hlt(void)
+#ifdef CONFIG_BOOTBLOCK_MAINBOARD_INIT
+#include CONFIG_BOOTBLOCK_MAINBOARD_INIT
+#else
+static void bootblock_mainboard_init(void)
 {
-	/* is there such a thing as hlt on ARM? */
-	// asm volatile ("1:\n\thlt\n\tjmp 1b\n\t");
-	asm volatile ("1:\nb 1b\n\t");
+#ifdef CONFIG_BOOTBLOCK_CPU_INIT
+	bootblock_cpu_init();
+#endif
 }
+#endif