PPC 85xx: Add qemu-ppce500 machine

For KVM we have a special PV machine type called "ppce500". This machine
is inspired by the MPC8544DS board, but implements a lot less features
than that one.

It also provides more PCI slots and is supposed to be enumerated by
device tree only.

This patch adds support for the generic ppce500 machine and tries to
rely solely on device tree for device enumeration.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

arch/powerpc/cpu/mpc85xx/Makefile

@@ -102,7 +102,9 @@ obj-y	+= cpu.o
 obj-y	+= cpu_init.o
 obj-y	+= cpu_init_early.o
 obj-y	+= interrupts.o
+ifneq ($(CONFIG_QEMU_E500),y)
 obj-y	+= speed.o
+endif
 obj-y	+= tlb.o
 obj-y	+= traps.o
 

arch/powerpc/cpu/mpc85xx/cpu.c

@@ -272,7 +272,7 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #ifndef CONFIG_SYS_FSL_TBCLK_DIV
 #define CONFIG_SYS_FSL_TBCLK_DIV 8
 #endif
-unsigned long get_tbclk (void)
+__weak unsigned long get_tbclk (void)
 {
 	unsigned long tbclk_div = CONFIG_SYS_FSL_TBCLK_DIV;
 
@@ -338,7 +338,8 @@ void mpc85xx_reginfo(void)
 	!defined(CONFIG_SYS_INIT_L2_ADDR)
 phys_size_t initdram(int board_type)
 {
-#if defined(CONFIG_SPD_EEPROM) || defined(CONFIG_DDR_SPD)
+#if defined(CONFIG_SPD_EEPROM) || defined(CONFIG_DDR_SPD) || \
+	defined(CONFIG_QEMU_E500)
 	return fsl_ddr_sdram_size();
 #else
 	return (phys_size_t)CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;

arch/powerpc/cpu/mpc85xx/cpu_init_early.c

@@ -79,7 +79,7 @@ void setup_ifc(void)
 #endif
 
 /* We run cpu_init_early_f in AS = 1 */
-void cpu_init_early_f(void)
+void cpu_init_early_f(void *fdt)
 {
 	u32 mas0, mas1, mas2, mas3, mas7;
 	int i;
@@ -102,6 +102,12 @@ void cpu_init_early_f(void)
 	for (i = 0; i < sizeof(gd_t); i++)
 		((char *)gd)[i] = 0;
 
+	/*
+	 * CONFIG_SYS_CCSRBAR_PHYS below may use gd->fdt_blob on ePAPR systems,
+	 * so we need to populate it before it accesses it.
+	 */
+	gd->fdt_blob = fdt;
+
 	mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(13);
 	mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_1M);
 	mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G);

arch/powerpc/cpu/mpc85xx/start.S

@@ -78,6 +78,13 @@ _start_e500:
 	li	r1,MSR_DE
 	mtmsr 	r1
 
+	/*
+	 * If we got an ePAPR device tree pointer passed in as r3, we need that
+	 * later in cpu_init_early_f(). Save it to a safe register before we
+	 * clobber it so that we can fetch it from there later.
+	 */
+	mr	r24, r3
+
 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510
 	mfspr	r3,SPRN_SVR
 	rlwinm	r3,r3,0,0xff
@@ -1142,6 +1149,10 @@ _start_cont:
 	mr	r1,r3		/* Transfer to SP(r1) */
 
 	GET_GOT
+
+	/* Pass our potential ePAPR device tree pointer to cpu_init_early_f */
+	mr	r3, r24
+
 	bl	cpu_init_early_f
 
 	/* switch back to AS = 0 */

arch/powerpc/cpu/mpc85xx/tlb.c

@@ -24,7 +24,7 @@ void invalidate_tlb(u8 tlb)
 		mtspr(MMUCSR0, 0x2);
 }
 
-void init_tlbs(void)
+__weak void init_tlbs(void)
 {
 	int i;
 

arch/powerpc/include/asm/config_mpc85xx.h

@@ -797,6 +797,10 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
 #define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000
 #define CONFIG_SYS_FSL_ERRATUM_A005125
 
+#elif defined(CONFIG_QEMU_E500)
+#define CONFIG_MAX_CPUS			1
+#define CONFIG_SYS_CCSRBAR_DEFAULT	0xe0000000
+
 #else
 #error Processor type not defined for this platform
 #endif

board/freescale/qemu-ppce500/Makefile

@@ -0,0 +1,9 @@
+#
+# Copyright 2007 Freescale Semiconductor, Inc.
+# (C) Copyright 2001-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= qemu-ppce500.o

board/freescale/qemu-ppce500/qemu-ppce500.c

@@ -0,0 +1,348 @@
+/*
+ * Copyright 2007,2009-2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <pci.h>
+#include <asm/processor.h>
+#include <asm/mmu.h>
+#include <asm/fsl_pci.h>
+#include <asm/io.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <netdev.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <malloc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void *get_fdt_virt(void)
+{
+	return (void *)CONFIG_SYS_TMPVIRT;
+}
+
+static uint64_t get_fdt_phys(void)
+{
+	return (uint64_t)(uintptr_t)gd->fdt_blob;
+}
+
+static void map_fdt_as(int esel)
+{
+	u32 mas0, mas1, mas2, mas3, mas7;
+	uint64_t fdt_phys = get_fdt_phys();
+	unsigned long fdt_phys_tlb = fdt_phys & ~0xffffful;
+	unsigned long fdt_virt_tlb = (ulong)get_fdt_virt() & ~0xffffful;
+
+	mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(esel);
+	mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_1M);
+	mas2 = FSL_BOOKE_MAS2(fdt_virt_tlb, 0);
+	mas3 = FSL_BOOKE_MAS3(fdt_phys_tlb, 0, MAS3_SW|MAS3_SR);
+	mas7 = FSL_BOOKE_MAS7(fdt_phys_tlb);
+
+	write_tlb(mas0, mas1, mas2, mas3, mas7);
+}
+
+uint64_t get_phys_ccsrbar_addr_early(void)
+{
+	void *fdt = get_fdt_virt();
+	uint64_t r;
+
+	/*
+	 * To be able to read the FDT we need to create a temporary TLB
+	 * map for it.
+	 */
+	map_fdt_as(10);
+	r = fdt_get_base_address(fdt, fdt_path_offset(fdt, "/soc"));
+	disable_tlb(10);
+
+	return r;
+}
+
+int board_early_init_f(void)
+{
+	return 0;
+}
+
+int checkboard(void)
+{
+	return 0;
+}
+
+static int pci_map_region(void *fdt, int pci_node, int range_id,
+			  phys_size_t *ppaddr, pci_addr_t *pvaddr,
+			  pci_size_t *psize, ulong *pmap_addr)
+{
+	uint64_t addr;
+	uint64_t size;
+	ulong map_addr;
+	int r;
+
+	r = fdt_read_range(fdt, pci_node, 0, NULL, &addr, &size);
+	if (r)
+		return r;
+
+	if (ppaddr)
+		*ppaddr = addr;
+	if (psize)
+		*psize = size;
+
+	if (!pmap_addr)
+		return 0;
+
+	map_addr = *pmap_addr;
+
+	/* Align map_addr */
+	map_addr += size - 1;
+	map_addr &= ~(size - 1);
+
+	if (map_addr + size >= CONFIG_SYS_PCI_MAP_END)
+		return -1;
+
+	/* Map virtual memory for range */
+	assert(!tlb_map_range(map_addr, addr, size, TLB_MAP_IO));
+	*pmap_addr = map_addr + size;
+
+	if (pvaddr)
+		*pvaddr = map_addr;
+
+	return 0;
+}
+
+void pci_init_board(void)
+{
+	struct pci_controller *pci_hoses;
+	void *fdt = get_fdt_virt();
+	int pci_node = -1;
+	int pci_num = 0;
+	int pci_count = 0;
+	ulong map_addr;
+
+	puts("\n");
+
+	/* Start MMIO and PIO range maps above RAM */
+	map_addr = CONFIG_SYS_PCI_MAP_START;
+
+	/* Count and allocate PCI buses */
+	pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
+			"device_type", "pci", 4);
+	while (pci_node != -FDT_ERR_NOTFOUND) {
+		pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
+				"device_type", "pci", 4);
+		pci_count++;
+	}
+
+	if (pci_count) {
+		pci_hoses = malloc(sizeof(struct pci_controller) * pci_count);
+	} else {
+		printf("PCI: disabled\n\n");
+		return;
+	}
+
+	/* Spawn PCI buses based on device tree */
+	pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
+			"device_type", "pci", 4);
+	while (pci_node != -FDT_ERR_NOTFOUND) {
+		struct fsl_pci_info pci_info = { };
+		const fdt32_t *reg;
+		int r;
+
+		reg = fdt_getprop(fdt, pci_node, "reg", NULL);
+		pci_info.regs = fdt_translate_address(fdt, pci_node, reg);
+
+		/* Map MMIO range */
+		r = pci_map_region(fdt, pci_node, 0, &pci_info.mem_phys, NULL,
+				   &pci_info.mem_size, &map_addr);
+		if (r)
+			break;
+
+		/* Map PIO range */
+		r = pci_map_region(fdt, pci_node, 1, &pci_info.io_phys, NULL,
+				   &pci_info.io_size, &map_addr);
+		if (r)
+			break;
+
+		/*
+		 * The PCI framework finds virtual addresses for the buses
+		 * through our address map, so tell it the physical addresses.
+		 */
+		pci_info.mem_bus = pci_info.mem_phys;
+		pci_info.io_bus = pci_info.io_phys;
+
+		/* Instantiate */
+		pci_info.pci_num = pci_num + 1;
+
+		fsl_setup_hose(&pci_hoses[pci_num], pci_info.regs);
+		printf("PCI: base address %lx\n", pci_info.regs);
+
+		fsl_pci_init_port(&pci_info, &pci_hoses[pci_num], pci_num);
+
+		/* Jump to next PCI node */
+		pci_node = fdt_node_offset_by_prop_value(fdt, pci_node,
+				"device_type", "pci", 4);
+		pci_num++;
+	}
+
+	puts("\n");
+}
+
+int last_stage_init(void)
+{
+	void *fdt = get_fdt_virt();
+	int len = 0;
+	const uint64_t *prop;
+	int chosen;
+
+	chosen = fdt_path_offset(fdt, "/chosen");
+	if (chosen < 0) {
+		printf("Couldn't find /chosen node in fdt\n");
+		return -EIO;
+	}
+
+	/* -kernel boot */
+	prop = fdt_getprop(fdt, chosen, "qemu,boot-kernel", &len);
+	if (prop && (len >= 8))
+		setenv_hex("qemu_kernel_addr", *prop);
+
+	/* Give the user a variable for the host fdt */
+	setenv_hex("fdt_addr_r", (ulong)fdt);
+
+	return 0;
+}
+
+static uint64_t get_linear_ram_size(void)
+{
+	void *fdt = get_fdt_virt();
+	const void *prop;
+	int memory;
+	int len;
+
+	memory = fdt_path_offset(fdt, "/memory");
+	prop = fdt_getprop(fdt, memory, "reg", &len);
+
+	if (prop && len >= 16)
+		return *(uint64_t *)(prop+8);
+
+	panic("Couldn't determine RAM size");
+}
+
+int board_eth_init(bd_t *bis)
+{
+	return pci_eth_init(bis);
+}
+
+#if defined(CONFIG_OF_BOARD_SETUP)
+void ft_board_setup(void *blob, bd_t *bd)
+{
+	FT_FSL_PCI_SETUP;
+}
+#endif
+
+void print_laws(void)
+{
+	/* We don't emulate LAWs yet */
+}
+
+phys_size_t fixed_sdram(void)
+{
+	return get_linear_ram_size();
+}
+
+phys_size_t fsl_ddr_sdram_size(void)
+{
+	return get_linear_ram_size();
+}
+
+void init_tlbs(void)
+{
+	phys_size_t ram_size;
+
+	/*
+	 * Create a temporary AS=1 map for the fdt
+	 *
+	 * We use ESEL=0 here to overwrite the previous AS=0 map for ourselves
+	 * which was only 4k big. This way we don't have to clear any other maps.
+	 */
+	map_fdt_as(0);
+
+	/* Fetch RAM size from the fdt */
+	ram_size = get_linear_ram_size();
+
+	/* And remove our fdt map again */
+	disable_tlb(0);
+
+	/* Create an internal map of manually created TLB maps */
+	init_used_tlb_cams();
+
+	/* Create a dynamic AS=0 CCSRBAR mapping */
+	assert(!tlb_map_range(CONFIG_SYS_CCSRBAR, CONFIG_SYS_CCSRBAR_PHYS,
+			      1024 * 1024, TLB_MAP_IO));
+
+	/* Create a RAM map that spans all accessible RAM */
+	setup_ddr_tlbs(ram_size >> 20);
+
+	/* Create a map for the TLB */
+	assert(!tlb_map_range((ulong)get_fdt_virt(), get_fdt_phys(),
+			      1024 * 1024, TLB_MAP_RAM));
+}
+
+void init_laws(void)
+{
+	/* We don't emulate LAWs yet */
+}
+
+static uint32_t get_cpu_freq(void)
+{
+	void *fdt = get_fdt_virt();
+	int cpus_node = fdt_path_offset(fdt, "/cpus");
+	int cpu_node = fdt_first_subnode(fdt, cpus_node);
+	const char *prop = "clock-frequency";
+	return fdt_getprop_u32_default_node(fdt, cpu_node, 0, prop, 0);
+}
+
+void get_sys_info(sys_info_t *sys_info)
+{
+	int freq = get_cpu_freq();
+
+	memset(sys_info, 0, sizeof(sys_info_t));
+	sys_info->freq_systembus = freq;
+	sys_info->freq_ddrbus = freq;
+	sys_info->freq_processor[0] = freq;
+}
+
+int get_clocks (void)
+{
+	sys_info_t sys_info;
+
+	get_sys_info(&sys_info);
+
+	gd->cpu_clk = sys_info.freq_processor[0];
+	gd->bus_clk = sys_info.freq_systembus;
+	gd->mem_clk = sys_info.freq_ddrbus;
+	gd->arch.lbc_clk = sys_info.freq_ddrbus;
+
+	return 0;
+}
+
+unsigned long get_tbclk (void)
+{
+	void *fdt = get_fdt_virt();
+	int cpus_node = fdt_path_offset(fdt, "/cpus");
+	int cpu_node = fdt_first_subnode(fdt, cpus_node);
+	const char *prop = "timebase-frequency";
+	return fdt_getprop_u32_default_node(fdt, cpu_node, 0, prop, 0);
+}
+
+/********************************************
+ * get_bus_freq
+ * return system bus freq in Hz
+ *********************************************/
+ulong get_bus_freq (ulong dummy)
+{
+	sys_info_t sys_info;
+	get_sys_info(&sys_info);
+	return sys_info.freq_systembus;
+}

boards.cfg

@@ -959,6 +959,7 @@ Active  powerpc     mpc85xx        -           freescale       t4qds
 Active  powerpc     mpc85xx        -           freescale       t4qds               T4240QDS_SDCARD                      T4240QDS:PPC_T4240,RAMBOOT_PBL,SDCARD,SYS_TEXT_BASE=0xFFF40000                                                                    -
 Active  powerpc     mpc85xx        -           freescale       t4qds               T4240QDS_SPIFLASH                    T4240QDS:PPC_T4240,RAMBOOT_PBL,SPIFLASH,SYS_TEXT_BASE=0xFFF40000                                                                  -
 Active  powerpc     mpc85xx        -           freescale       t4qds               T4240QDS_SRIO_PCIE_BOOT              T4240QDS:PPC_T4240,SRIO_PCIE_BOOT_SLAVE,SYS_TEXT_BASE=0xFFF40000                                                                  -
+Active  powerpc     mpc85xx        -           freescale       qemu-ppce500        qemu-ppce500                         -                                                                                                                                 Alexander Graf <agraf@suse.de>
 Active  powerpc     mpc85xx        -           gdsys           p1022               controlcenterd_36BIT_SDCARD          controlcenterd:36BIT,SDCARD                                                                                                       Dirk Eibach <eibach@gdsys.de>
 Active  powerpc     mpc85xx        -           gdsys           p1022               controlcenterd_36BIT_SDCARD_DEVELOP  controlcenterd:36BIT,SDCARD,DEVELOP                                                                                               Dirk Eibach <eibach@gdsys.de>
 Active  powerpc     mpc85xx        -           gdsys           p1022               controlcenterd_TRAILBLAZER           controlcenterd:TRAILBLAZER,SPIFLASH                                                                                               Dirk Eibach <eibach@gdsys.de>

include/configs/qemu-ppce500.h

@@ -0,0 +1,206 @@
+/*
+ * Copyright 2011-2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Corenet DS style board configuration file
+ */
+#ifndef __QEMU_PPCE500_H
+#define __QEMU_PPCE500_H
+
+#define CONFIG_CMD_REGINFO
+
+/* High Level Configuration Options */
+#define CONFIG_BOOKE
+#define CONFIG_E500			/* BOOKE e500 family */
+#define CONFIG_QEMU_E500
+
+#undef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xf01000 /* 15 MB */
+
+#define CONFIG_SYS_MPC85XX_NO_RESETVEC
+
+#define CONFIG_SYS_RAMBOOT
+
+#define CONFIG_PCI			/* Enable PCI/PCIE */
+#define CONFIG_PCI1		1	/* PCI controller 1 */
+#define CONFIG_FSL_PCI_INIT		/* Use common FSL init code */
+#define CONFIG_SYS_PCI_64BIT		/* enable 64-bit PCI resources */
+
+#define CONFIG_ENV_OVERWRITE
+
+#define CONFIG_ENABLE_36BIT_PHYS
+
+#define CONFIG_ADDR_MAP
+#define CONFIG_SYS_NUM_ADDR_MAP		16	/* number of TLB1 entries */
+
+#define CONFIG_SYS_MEMTEST_START	0x00200000	/* memtest works on */
+#define CONFIG_SYS_MEMTEST_END		0x00400000
+#define CONFIG_SYS_ALT_MEMTEST
+#define CONFIG_PANIC_HANG	/* do not reset board on panic */
+
+/* Needed to fill the ccsrbar pointer */
+#define CONFIG_BOARD_EARLY_INIT_F
+
+/* Virtual address to CCSRBAR */
+#define CONFIG_SYS_CCSRBAR		0xe0000000
+/* Physical address should be a function call */
+#ifndef __ASSEMBLY__
+extern unsigned long long get_phys_ccsrbar_addr_early(void);
+#endif
+#define CONFIG_SYS_CCSR_DO_NOT_RELOCATE
+
+/* Virtual address range for PCI region maps */
+#define CONFIG_SYS_PCI_MAP_START	0x80000000
+#define CONFIG_SYS_PCI_MAP_END		0xe8000000
+
+/* Virtual address to a temporary map if we need it (max 128MB) */
+#define CONFIG_SYS_TMPVIRT		0xe8000000
+
+/*
+ * DDR Setup
+ */
+#define CONFIG_VERY_BIG_RAM
+#define CONFIG_SYS_DDR_SDRAM_BASE	0x00000000
+#define CONFIG_SYS_SDRAM_BASE		CONFIG_SYS_DDR_SDRAM_BASE
+
+#define CONFIG_CHIP_SELECTS_PER_CTRL	0
+
+#define CONFIG_SYS_CLK_FREQ        33000000
+
+#define CONFIG_SYS_NO_FLASH
+
+#define CONFIG_SYS_BOOT_BLOCK		0x00000000	/* boot TLB */
+
+#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE
+
+#define CONFIG_ENV_IS_NOWHERE
+
+#define CONFIG_HWCONFIG
+
+#define CONFIG_SYS_INIT_RAM_ADDR		0x00100000
+#define CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH	0x0
+#define CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW	0x00100000
+/* The assembler doesn't like typecast */
+#define CONFIG_SYS_INIT_RAM_ADDR_PHYS \
+	((CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH * 1ull << 32) | \
+	  CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW)
+#define CONFIG_SYS_INIT_RAM_SIZE		0x00004000
+
+#define CONFIG_SYS_GBL_DATA_OFFSET	(CONFIG_SYS_INIT_RAM_SIZE - \
+					GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_INIT_SP_OFFSET	CONFIG_SYS_GBL_DATA_OFFSET
+
+#define CONFIG_SYS_MONITOR_LEN		(512 * 1024)
+#define CONFIG_SYS_MALLOC_LEN		(4 * 1024 * 1024)
+
+#define CONFIG_CONS_INDEX	1
+#define CONFIG_SYS_NS16550
+#define CONFIG_SYS_NS16550_SERIAL
+#define CONFIG_SYS_NS16550_REG_SIZE	1
+#define CONFIG_SYS_NS16550_CLK		(get_bus_freq(0))
+
+#define CONFIG_SYS_BAUDRATE_TABLE	\
+	{300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200}
+
+#define CONFIG_SYS_NS16550_COM1	(CONFIG_SYS_CCSRBAR+0x4500)
+#define CONFIG_SYS_NS16550_COM2	(CONFIG_SYS_CCSRBAR+0x4600)
+
+/* Use the HUSH parser */
+#define CONFIG_SYS_HUSH_PARSER
+#define CONFIG_SYS_PROMPT_HUSH_PS2 "> "
+
+/* pass open firmware flat tree */
+#define CONFIG_OF_LIBFDT
+#define CONFIG_OF_BOARD_SETUP
+#define CONFIG_OF_STDOUT_VIA_ALIAS
+
+/* new uImage format support */
+#define CONFIG_FIT
+#define CONFIG_FIT_VERBOSE	/* enable fit_format_{error,warning}() */
+
+/*
+ * General PCI
+ * Memory space is mapped 1-1, but I/O space must start from 0.
+ */
+
+#ifdef CONFIG_PCI
+#define CONFIG_PCI_INDIRECT_BRIDGE
+#define CONFIG_NET_MULTI
+#define CONFIG_PCI_PNP			/* do pci plug-and-play */
+#define CONFIG_E1000
+
+#define CONFIG_PCI_SCAN_SHOW		/* show pci devices on startup */
+#define CONFIG_DOS_PARTITION
+#endif	/* CONFIG_PCI */
+
+#define CONFIG_LBA48
+#define CONFIG_DOS_PARTITION
+#define CONFIG_CMD_EXT2
+
+/*
+ * Environment
+ */
+#define CONFIG_ENV_SIZE		0x2000
+
+#define CONFIG_LOADS_ECHO		/* echo on for serial download */
+
+#define CONFIG_LAST_STAGE_INIT
+
+/*
+ * Command line configuration.
+ */
+#include <config_cmd_default.h>
+
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_ELF
+#define CONFIG_CMD_BOOTZ
+#define CONFIG_CMD_GREPENV
+#define CONFIG_CMD_IRQ
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_SETEXPR
+
+#ifdef CONFIG_PCI
+#define CONFIG_CMD_PCI
+#define CONFIG_CMD_NET
+#endif
+
+/*
+ * Miscellaneous configurable options
+ */
+#define CONFIG_SYS_LONGHELP			/* undef to save memory	*/
+#define CONFIG_CMDLINE_EDITING			/* Command-line editing */
+#define CONFIG_AUTO_COMPLETE			/* add autocompletion support */
+#define CONFIG_SYS_LOAD_ADDR	0x2000000	/* default load address */
+#define CONFIG_SYS_CBSIZE	256		/* Console I/O Buffer Size */
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE+sizeof(CONFIG_SYS_PROMPT)+16)
+#define CONFIG_SYS_MAXARGS	16		/* max number of command args */
+#define CONFIG_SYS_BARGSIZE	CONFIG_SYS_CBSIZE/* Boot Argument Buffer Size */
+
+/*
+ * For booting Linux, the board info and command line data
+ * have to be in the first 64 MB of memory, since this is
+ * the maximum mapped by the Linux kernel during initialization.
+ */
+#define CONFIG_SYS_BOOTMAPSZ	(64 << 20)	/* Initial map for Linux*/
+#define CONFIG_SYS_BOOTM_LEN	(64 << 20)	/* Increase max gunzip size */
+
+/*
+ * Environment Configuration
+ */
+#define CONFIG_ROOTPATH		"/opt/nfsroot"
+#define CONFIG_BOOTFILE		"uImage"
+#define CONFIG_UBOOTPATH	"u-boot.bin"	/* U-Boot image on TFTP server*/
+
+/* default location for tftp and bootm */
+#define CONFIG_LOADADDR		1000000
+
+#define CONFIG_BAUDRATE	115200
+
+#define CONFIG_BOOTDELAY        1
+#define CONFIG_BOOTCOMMAND		\
+	"test -n \"$qemu_kernel_addr\" && bootm $qemu_kernel_addr - $fdt_addr_r\0"
+
+#endif	/* __QEMU_PPCE500_H */