Minimal P2020RDB platform support and configuration file

This is limited board support for the Freescale P2020RDB in single CPU
mode. The DDR is configured for a memory bus running at 667Mhz.
The system boots from NOR flash and provides the console at 115200
bauds, no other drivers are included.

Finally, the PPC Kconfig and make file make the building of
the P2020RDB platform firmware possible.

Signed-off-by: Renaud Barbier <renaud.barbier@ge.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

8 files changed, 593 insertions, 0 deletions

diff --git a/arch/ppc/Makefile b/arch/ppc/Makefile
index 67eb667997..f0322a26b4 100644
--- a/arch/ppc/Makefile
+++ b/arch/ppc/Makefile
@@ -12,6 +12,7 @@ CPPFLAGS += -Wa,-me500x2 -msoft-float -mno-string
 endif
 
 board-$(CONFIG_MACH_PHYCORE_MPC5200B_TINY)	:= pcm030
+board-$(CONFIG_P2020RDB)			:= freescale-p2020rdb
 
 machine-$(CONFIG_ARCH_MPC5200)			:= mpc5xxx
 machine-$(CONFIG_ARCH_MPC85XX)			:= mpc85xx
diff --git a/arch/ppc/boards/freescale-p2020rdb/Makefile b/arch/ppc/boards/freescale-p2020rdb/Makefile
new file mode 100644
index 0000000000..141b6806e2
--- /dev/null
+++ b/arch/ppc/boards/freescale-p2020rdb/Makefile
@@ -0,0 +1,4 @@
+obj-y	+= p2020rdb.o
+obj-y	+= law.o
+obj-y	+= tlb.o
+extra-y += barebox.lds
diff --git a/arch/ppc/boards/freescale-p2020rdb/barebox.lds.S b/arch/ppc/boards/freescale-p2020rdb/barebox.lds.S
new file mode 100644
index 0000000000..cfccea94df
--- /dev/null
+++ b/arch/ppc/boards/freescale-p2020rdb/barebox.lds.S
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2012 GE Intelligent Platforms, Inc.
+ * Copyright 2007-2009, 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
+ */
+
+#include <asm-generic/barebox.lds.h>
+
+#define RESET_VECTOR_ADDRESS	0xeffffffc
+
+OUTPUT_ARCH("powerpc")
+
+PHDRS
+{
+  text PT_LOAD;
+  bss PT_LOAD;
+}
+
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  . = TEXT_BASE;
+
+  .text      :
+  {
+    *(.text*)
+  } :text
+
+  _etext = .;
+  PROVIDE (etext = .);
+
+  .rodata    :
+  {
+    *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+  } :text
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+
+  _erotext = .;
+  PROVIDE (erotext = .);
+
+  .reloc   :
+  {
+    _GOT2_TABLE_ = .;
+    KEEP(*(.got2))
+    KEEP(*(.got))
+    PROVIDE(_GLOBAL_OFFSET_TABLE_ = . + 4);
+    _FIXUP_TABLE_ = .;
+    KEEP(*(.fixup))
+  }
+  __got2_entries = ((_GLOBAL_OFFSET_TABLE_ - _GOT2_TABLE_) >> 2) - 1;
+  __fixup_entries = (. - _FIXUP_TABLE_) >> 2;
+
+  .data    :
+  {
+    *(.data*)
+    *(.data1*)
+    *(.sdata*)
+    *(.sdata2*)
+    *(.dynamic*)
+    CONSTRUCTORS
+  }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  . = .;
+  __barebox_cmd_start = .;
+  .barebox_cmd : { BAREBOX_CMDS }
+  __barebox_cmd_end = .;
+
+  __barebox_initcalls_start = .;
+  .barebox_initcalls : { INITCALLS }
+  __barebox_initcalls_end = .;
+  __initcall_entries = (__barebox_initcalls_end - __barebox_initcalls_start)>>2;
+
+  __usymtab_start = .;
+  __usymtab : { BAREBOX_SYMS }
+  __usymtab_end = .;
+
+  __early_init_data_begin = .;
+  .early_init_data : { *(.early_init_data) }
+  __early_init_data_end = .;
+
+  . = .;
+  __start___ex_table = .;
+  __ex_table : { *(__ex_table) }
+  __stop___ex_table = .;
+
+  . = ALIGN(256);
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(256);
+  __init_end = .;
+
+  __init_size = __init_end - _start;
+
+  .bootpg RESET_VECTOR_ADDRESS - 0xffc :
+  {
+    _text = .;
+    _stext = .;
+    arch/ppc/cpu-85xx/start.o	(.bootpg)
+  } :text = 0xffff
+
+  .resetvec RESET_VECTOR_ADDRESS :
+  {
+    arch/ppc/cpu-85xx/resetvec.o	(.resetvec)
+  } :text = 0xffff
+
+  . = RESET_VECTOR_ADDRESS + 0x4;
+
+  . = 0x10000;
+  __bss_start = .;
+  .bss        :
+  {
+    *(.sbss*) *(.scommon*)
+    *(.dynbss*)
+    *(.bss*)
+    *(COMMON)
+  } :bss
+
+  . = ALIGN(4);
+  __bss_stop = .;
+  _end = . ;
+  PROVIDE (end = .);
+}
diff --git a/arch/ppc/boards/freescale-p2020rdb/config.h b/arch/ppc/boards/freescale-p2020rdb/config.h
new file mode 100644
index 0000000000..c780747d00
--- /dev/null
+++ b/arch/ppc/boards/freescale-p2020rdb/config.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2012 GE Intelligent Platforms, Inc.
+ * Copyright 2009-2011 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
+ */
+
+/*
+ * P2020RDB board configuration file
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#ifndef __ASSEMBLY__
+extern unsigned long get_board_sys_clk(unsigned long dummy);
+#endif
+#define CFG_SYS_CLK_FREQ	get_board_sys_clk(0)
+#define CFG_DDR_CLK_FREQ	66666666
+
+#define CFG_BTB			/* toggle branch predition */
+
+/*
+ * Base addresses -- Note these are effective addresses where the
+ * actual resources get mapped (not physical addresses)
+ */
+#define CFG_CCSRBAR_DEFAULT	0xff700000
+
+#define CFG_CCSRBAR		0xffe00000	/* relocated CCSRBAR */
+#define CFG_CCSRBAR_PHYS	CFG_CCSRBAR
+
+#define CFG_IMMR		CFG_CCSRBAR
+
+/* DDR Setup */
+
+#define CFG_CHIP_SELECTS_PER_CTRL   1
+
+#define CFG_SDRAM_BASE		0x00000000
+
+/* These timings are adjusted for a 667Mhz clock. */
+#define CFG_SYS_DDR_CS0_BNDS		0x0000003f	/* 1GB */
+#define CFG_SYS_DDR_CS0_CONFIG	        0x80014202
+#define CFG_SYS_DDR_TIMING_3		0x00030000
+#define CFG_SYS_DDR_TIMING_0		0x55770802
+#define CFG_SYS_DDR_TIMING_1		0x5f599543
+#define CFG_SYS_DDR_TIMING_2		0x0fa074d1
+
+#define CFG_SYS_DDR_CONTROL		0xc3000000
+#define CFG_SYS_DDR_CONTROL2		0x24401000
+#define CFG_SYS_DDR_MODE_1		0x00040852
+#define CFG_SYS_DDR_MODE_2		0x00000000
+#define CFG_SYS_MD_CNTL			0x00000000
+#define CFG_SYS_DDR_INTERVAL		0x0a280100
+
+#define CFG_SYS_DDR_DATA_INIT	        0xdeadbeef
+#define CFG_SYS_DDR_CLK_CTRL		0x03000000
+
+/*
+ * Memory map
+ *
+ * 0x0000_0000	0x3fff_ffff	DDR			1G cacheablen
+ *
+ * Localbus non-cacheable
+ * 0xef00_0000	0xefff_ffff	FLASH			16M non-cacheable
+ * 0xffd0_0000	0xffd0_3fff	L1 for stack		16K Cacheable TLB0
+ */
+
+/*
+ * Local Bus Definitions
+ */
+#define CFG_FLASH_BASE		0xef000000
+#define CFG_FLASH_BASE_PHYS	CFG_FLASH_BASE
+
+#define CFG_INIT_RAM_ADDR	0xffd00000	/* stack in RAM */
+/* Leave 256 bytes for global data */
+#define CFG_INIT_SP_OFFSET	(0x00004000 - 256)
+
+#define CFG_BR0_PRELIM	(BR_PHYS_ADDR(CFG_FLASH_BASE_PHYS) |	\
+			 BR_PS_16 | BR_V)	/* NOR Base Address */
+#define CFG_OR0_PRELIM  0xff000ff7		/* NOR Options      */
+
+#endif	/* __CONFIG_H */
diff --git a/arch/ppc/boards/freescale-p2020rdb/law.c b/arch/ppc/boards/freescale-p2020rdb/law.c
new file mode 100644
index 0000000000..394c512210
--- /dev/null
+++ b/arch/ppc/boards/freescale-p2020rdb/law.c
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2010 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
+ */
+
+#include <common.h>
+#include <asm/fsl_law.h>
+#include <asm/mmu.h>
+
+struct law_entry law_table[] = {
+	FSL_SET_LAW(CFG_FLASH_BASE_PHYS, LAW_SIZE_16M, LAW_TRGT_IF_LBC),
+};
+
+int num_law_entries = ARRAY_SIZE(law_table);
diff --git a/arch/ppc/boards/freescale-p2020rdb/p2020rdb.c b/arch/ppc/boards/freescale-p2020rdb/p2020rdb.c
new file mode 100644
index 0000000000..20897cbaee
--- /dev/null
+++ b/arch/ppc/boards/freescale-p2020rdb/p2020rdb.c
@@ -0,0 +1,230 @@
+/*
+ * Copyright 2012 GE Intelligent Platforms, Inc.
+ * Copyright 2009-2011 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
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <ns16550.h>
+#include <types.h>
+#include <partition.h>
+#include <memory.h>
+#include <asm/cache.h>
+#include <asm/fsl_ddr_sdram.h>
+#include <asm/fsl_law.h>
+#include <mach/mpc85xx.h>
+#include <mach/mmu.h>
+#include <mach/immap_85xx.h>
+#include <mach/clocks.h>
+#include <mach/early_udelay.h>
+
+#define VSC7385_RST_SET		0x00080000
+#define SLIC_RST_SET		0x00040000
+#define SGMII_PHY_RST_SET	0x00020000
+#define PCIE_RST_SET		0x00010000
+#define RGMII_PHY_RST_SET	0x02000000
+
+#define USB_RST_CLR		0x04000000
+
+#define GPIO_DIR		0x060f0000
+
+#define BOARD_PERI_RST_SET	(VSC7385_RST_SET | SLIC_RST_SET | \
+				SGMII_PHY_RST_SET | PCIE_RST_SET | \
+				RGMII_PHY_RST_SET)
+
+#define SYSCLK_MASK	0x00200000
+#define BOARDREV_MASK	0x10100000
+#define BOARDREV_B	0x10100000
+#define BOARDREV_C	0x00100000
+#define BOARDREV_D	0x00000000
+
+#define SYSCLK_66	66666666
+#define SYSCLK_50	50000000
+#define SYSCLK_100	100000000
+
+static int devices_init(void)
+{
+	add_cfi_flash_device(-1, CFG_FLASH_BASE, 16 << 20, 0);
+
+	devfs_add_partition("nor0", 0xf80000, 0x80000, DEVFS_PARTITION_FIXED,
+			    "self0");
+	return 0;
+}
+
+device_initcall(devices_init);
+
+static struct NS16550_plat serial_plat = {
+	.clock = 0,
+	.shift = 0,
+};
+
+static int p2020_console_init(void)
+{
+	serial_plat.clock = fsl_get_bus_freq(0);
+
+	add_ns16550_device(-1, 0xffe04500, 16, IORESOURCE_MEM_8BIT,
+			   &serial_plat);
+	return 0;
+}
+
+console_initcall(p2020_console_init);
+
+static int mem_init(void)
+{
+	barebox_add_memory_bank("ram0", 0x0, 1024 << 20);
+
+	return 0;
+}
+mem_initcall(mem_init);
+
+/*
+ * fixed_sdram: fixed sdram settings.
+ */
+phys_size_t fixed_sdram(void)
+{
+	void __iomem *regs = (void __iomem *)(MPC85xx_DDR_ADDR);
+	int sdram_cfg = (SDRAM_CFG_MEM_EN | SDRAM_CFG_SREN |
+			 SDRAM_CFG_SDRAM_TYPE_DDR2);
+	phys_size_t dram_size;
+
+	/* If already enabled (running from RAM), get out */
+	if (in_be32(regs + DDR_OFF(SDRAM_CFG)) & SDRAM_CFG_MEM_EN)
+		return fsl_get_effective_memsize();
+
+	out_be32(regs + DDR_OFF(CS0_BNDS), CFG_SYS_DDR_CS0_BNDS);
+	out_be32(regs + DDR_OFF(CS0_CONFIG), CFG_SYS_DDR_CS0_CONFIG);
+	out_be32(regs + DDR_OFF(TIMING_CFG_3), CFG_SYS_DDR_TIMING_3);
+	out_be32(regs + DDR_OFF(TIMING_CFG_0), CFG_SYS_DDR_TIMING_0);
+	out_be32(regs + DDR_OFF(TIMING_CFG_1), CFG_SYS_DDR_TIMING_1);
+	out_be32(regs + DDR_OFF(TIMING_CFG_2), CFG_SYS_DDR_TIMING_2);
+	out_be32(regs + DDR_OFF(SDRAM_CFG_2), CFG_SYS_DDR_CONTROL2);
+	out_be32(regs + DDR_OFF(SDRAM_MODE), CFG_SYS_DDR_MODE_1);
+	out_be32(regs + DDR_OFF(SDRAM_MODE_2), CFG_SYS_DDR_MODE_2);
+	out_be32(regs + DDR_OFF(SDRAM_MD_CNTL), CFG_SYS_MD_CNTL);
+	/* Basic refresh rate (7.8us),high temp is 3.9us  */
+	out_be32(regs + DDR_OFF(SDRAM_INTERVAL),
+			CFG_SYS_DDR_INTERVAL);
+	out_be32(regs + DDR_OFF(SDRAM_DATA_INIT),
+			CFG_SYS_DDR_DATA_INIT);
+	out_be32(regs + DDR_OFF(SDRAM_CLK_CNTL),
+			CFG_SYS_DDR_CLK_CTRL);
+
+	out_be32(regs + DDR_OFF(SDRAM_INIT_ADDR), 0);
+	out_be32(regs + DDR_OFF(SDRAM_INIT_ADDR_EXT), 0);
+	/*
+	 * Wait 200us for the DDR clock to stabilize.
+	 */
+	early_udelay(200);
+	asm volatile ("sync;isync");
+
+	out_be32(regs + DDR_OFF(SDRAM_CFG), sdram_cfg);
+
+	dram_size = fsl_get_effective_memsize();
+	if (fsl_set_ddr_laws(0, dram_size, LAW_TRGT_IF_DDR) < 0)
+		return 0;
+
+	return dram_size;
+}
+
+unsigned long get_board_sys_clk(ulong dummy)
+{
+	u32 val_gpdat, sysclk_gpio, board_rev_gpio;
+	void __iomem *gpio_regs = (void __iomem *)MPC85xx_GPIO_ADDR;
+
+	val_gpdat = in_be32(gpio_regs + MPC85xx_GPIO_GPDAT);
+	sysclk_gpio = val_gpdat & SYSCLK_MASK;
+	board_rev_gpio = val_gpdat & BOARDREV_MASK;
+
+	if (board_rev_gpio == BOARDREV_C) {
+		if (sysclk_gpio == 0)
+			return SYSCLK_66;
+		else
+			return SYSCLK_100;
+	} else if (board_rev_gpio == BOARDREV_B) {
+		if (sysclk_gpio == 0)
+			return SYSCLK_66;
+		else
+			return SYSCLK_50;
+	} else if (board_rev_gpio == BOARDREV_D) {
+		if (sysclk_gpio == 0)
+			return SYSCLK_66;
+		else
+			return SYSCLK_100;
+	}
+	return 0;
+}
+
+static void checkboard(void)
+{
+	u32 val_gpdat, board_rev_gpio;
+	void __iomem *gpio_regs = (void __iomem *)MPC85xx_GPIO_ADDR;
+
+	val_gpdat = in_be32(gpio_regs + MPC85xx_GPIO_GPDAT);
+	board_rev_gpio = val_gpdat & BOARDREV_MASK;
+
+	if ((board_rev_gpio != BOARDREV_C) && (board_rev_gpio != BOARDREV_B) &&
+	    (board_rev_gpio != BOARDREV_D))
+		panic("Unexpected Board REV %x detected!!\n", board_rev_gpio);
+
+	setbits_be32((gpio_regs + MPC85xx_GPIO_GPDIR), GPIO_DIR);
+
+	/*
+	 * Bringing the following peripherals out of reset via GPIOs
+	 * 0 = reset and 1 = out of reset
+	 * GPIO12 - Reset to Ethernet Switch
+	 * GPIO13 - Reset to SLIC/SLAC devices
+	 * GPIO14 - Reset to SGMII_PHY_N
+	 * GPIO15 - Reset to PCIe slots
+	 * GPIO6  - Reset to RGMII PHY
+	 * GPIO5  - Reset to USB3300 devices 1 = reset and 0 = out of reset
+	 */
+	clrsetbits_be32((gpio_regs + MPC85xx_GPIO_GPDAT), USB_RST_CLR,
+			BOARD_PERI_RST_SET);
+}
+
+static int board_init_r(void)
+{
+	const unsigned int flashbase = CFG_FLASH_BASE;
+	const u8 flash_esel = e500_find_tlb_idx((void *)flashbase, 1);
+
+	checkboard();
+
+	/* Flush d-cache and invalidate i-cache of any FLASH data */
+	flush_dcache();
+	invalidate_icache();
+
+	/* invalidate existing TLB entry for flash */
+	e500_disable_tlb(flash_esel);
+
+	/*
+	 * Remap Boot flash region to caching-inhibited
+	 * so that flash can be erased properly.
+	 */
+	e500_set_tlb(1, flashbase, CFG_FLASH_BASE_PHYS,
+		MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		0, flash_esel, BOOKE_PAGESZ_16M, 1);
+
+	fsl_l2_cache_init();
+
+	return 0;
+}
+core_initcall(board_init_r);
diff --git a/arch/ppc/boards/freescale-p2020rdb/tlb.c b/arch/ppc/boards/freescale-p2020rdb/tlb.c
new file mode 100644
index 0000000000..5f3b4a7ec7
--- /dev/null
+++ b/arch/ppc/boards/freescale-p2020rdb/tlb.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright 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
+ */
+
+#include <common.h>
+#include <mach/mmu.h>
+
+struct fsl_e_tlb_entry tlb_table[] = {
+	/* TLB 0 - for temp stack in cache */
+	FSL_SET_TLB_ENTRY(0, CFG_INIT_RAM_ADDR, CFG_INIT_RAM_ADDR,
+			MAS3_SX|MAS3_SW|MAS3_SR, 0,
+			0, 0, BOOKE_PAGESZ_4K, 0),
+	FSL_SET_TLB_ENTRY(0, CFG_INIT_RAM_ADDR + (4 * 1024),
+			CFG_INIT_RAM_ADDR + (4 * 1024),
+			MAS3_SX|MAS3_SW|MAS3_SR, 0,
+			0, 0, BOOKE_PAGESZ_4K, 0),
+	FSL_SET_TLB_ENTRY(0, CFG_INIT_RAM_ADDR + (8 * 1024),
+			CFG_INIT_RAM_ADDR + (8 * 1024),
+			MAS3_SX|MAS3_SW|MAS3_SR, 0,
+			0, 0, BOOKE_PAGESZ_4K, 0),
+	FSL_SET_TLB_ENTRY(0, CFG_INIT_RAM_ADDR + (12 * 1024),
+			CFG_INIT_RAM_ADDR + (12 * 1024),
+			MAS3_SX|MAS3_SW|MAS3_SR, 0,
+			0, 0, BOOKE_PAGESZ_4K, 0),
+
+	/* TLB 1 */
+	/* *I*** - Covers boot page */
+	FSL_SET_TLB_ENTRY(1, 0xfffff000, 0xfffff000,
+			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+			0, 0, BOOKE_PAGESZ_4K, 1),
+
+	/* *I*G* - CCSRBAR */
+	FSL_SET_TLB_ENTRY(1, CFG_CCSRBAR, CFG_CCSRBAR_PHYS,
+			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+			0, 1, BOOKE_PAGESZ_1M, 1),
+
+	/* W**G* - Flash/promjet, localbus */
+	/* This will be changed to *I*G* after relocation to RAM. */
+	FSL_SET_TLB_ENTRY(1, CFG_FLASH_BASE, CFG_FLASH_BASE_PHYS,
+			MAS3_SX|MAS3_SR, MAS2_W|MAS2_G,
+			0, 2, BOOKE_PAGESZ_16M, 1),
+};
+
+int num_tlb_entries = ARRAY_SIZE(tlb_table);
diff --git a/arch/ppc/configs/p2020rdb_defconfig b/arch/ppc/configs/p2020rdb_defconfig
new file mode 100644
index 0000000000..f8a0687251
--- /dev/null
+++ b/arch/ppc/configs/p2020rdb_defconfig
@@ -0,0 +1,23 @@
+CONFIG_ARCH_MPC85XX=y
+CONFIG_P2020RDB=y
+CONFIG_P2020=y
+CONFIG_LONGHELP=y
+CONFIG_GLOB=y
+CONFIG_CMDLINE_EDITING=y
+CONFIG_AUTO_COMPLETE=y
+CONFIG_CMD_SLEEP=y
+CONFIG_CMD_FLASH=y
+CONFIG_CMD_RESET=y
+CONFIG_CMD_GO=y
+CONFIG_FSL_ELBC=y
+CONFIG_DRIVER_CFI=y
+CONFIG_DRIVER_CFI_AMD=y
+CONFIG_DRIVER_CFI_INTEL=n
+CONFIG_DRIVER_CFI_BANK_WIDTH_1=n
+CONFIG_DRIVER_CFI_BANK_WIDTH_2=y
+CONFIG_DRIVER_CFI_BANK_WIDTH_4=n
+CONFIG_MTD=y
+CONFIG_MALLOC_SIZE=0x200000
+CONFIG_BAUDRATE=115200
+CONFIG_DRIVER_SERIAL_NS16550=y
+CONFIG_RELOCATABLE=y