powerpc/p4080: Add support for secure boot flow

Pre u-boot Flow:
1. User loads the u-boot image in flash
2. PBL/Configuration word is used to create LAW for Flash at 0xc0000000
   (Please note that ISBC expects all these addresses, images to be
    validated, entry point etc within 0 - 3.5G range)
3. ISBC validates the u-boot image, and passes control to u-boot
   at 0xcffffffc.

Changes in u-boot:
1. Temporarily map CONFIG_SYS_MONITOR_BASE to the 1M
   CONFIG_SYS_PBI_FLASH_WINDOW in AS=1.
   (The CONFIG_SYS_PBI_FLASH_WINDOW is the address map for the flash
    created by PBL/configuration word within 0 - 3.5G memory range. The
    u-boot image at this address has been validated by ISBC code)
2. Remove TLB entries for 0 - 3.5G created by ISBC code
3. Remove the LAW entry for the CONFIG_SYS_PBI_FLASH_WINDOW created by
   PBL/configuration word after switch to AS = 1

Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Signed-off-by: Kuldip Giroh <kuldip.giroh@freescale.com>
Acked-by: Wood Scott-B07421 <B07421@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/fsl_secure_boot.h b/arch/powerpc/include/asm/fsl_secure_boot.h
new file mode 100644
index 000000000..d1c1967d1
--- /dev/null
+++ b/arch/powerpc/include/asm/fsl_secure_boot.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 (at your option) 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __FSL_SECURE_BOOT_H
+#define __FSL_SECURE_BOOT_H
+
+/* Starting TLB number for the TLB entried for 3.5 G space created by ISBC */
+#if defined(CONFIG_FSL_CORENET)
+#define CONFIG_SYS_ISBC_START_TLB		3
+#else
+#define CONFIG_SYS_ISBC_START_TLB		0
+#endif
+
+/* Number fo TLB's created by ISBC */
+#define CONFIG_SYS_ISBC_NUM_TLBS		5
+
+#if defined(CONFIG_FSL_CORENET)
+#define CONFIG_SYS_PBI_FLASH_BASE		0xc0000000
+#else
+#define CONFIG_SYS_PBI_FLASH_BASE		0xce000000
+#endif
+#define CONFIG_SYS_PBI_FLASH_WINDOW		0xcff80000
+
+#endif