[PATCH 1/2] Add support for the Phytec phyCARD-A-L1 (PCA-A-L1).
Sascha Hauer
s.hauer at pengutronix.de
Thu Dec 22 12:32:27 EST 2011
Hi Jürgen,
On Thu, Dec 22, 2011 at 03:25:56PM +0100, Juergen Kilb wrote:
> diff --git a/arch/arm/boards/phycard-a-l1/config.h b/arch/arm/boards/phycard-a-l1/config.h
> new file mode 100644
> index 0000000..dfcbd0d
> --- /dev/null
> +++ b/arch/arm/boards/phycard-a-l1/config.h
> @@ -0,0 +1,42 @@
> +/**
> + * @file
> + * @brief provide a wrapper for standard malloc and stack size defines
> + *
> + * FileName: arch/arm/boards/phycard-a-l1/config.h
> + *
> + * Standard defines should be configurable for us to move Stack and malloc
> + * areas around this defines some basics for that
> + */
> +/*
> + * (C) Copyright 2011 Jurgen Kilb <j.kilb at phytec.de>
> + * same as arch/arm/boards/omap/config.h just with the
> + * modification in the doxygen part above.
> + *
> + * (C) Copyright 2006-2008
> + * Texas Instruments, <www.ti.com>
> + * Nishanth Menon <x0nishan at ti.com>
> + *
> + * 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 __MACH_OMAP_CONFIG_H
> +#define __MACH_OMAP_CONFIG_H
> +
> +/** define CFG_MALLOC_LEN from Kconfig define */
> +#define CFG_MALLOC_LEN CONFIG_OMAP_MALLOC_LEN
> +/** define CONFIG_STACKSIZE from Kconfig define */
> +#define CONFIG_STACKSIZE CONFIG_OMAP_CONFIG_STACKSIZE
These are unused. Please remove.
> +
> +#endif /* __MACH_OMAP_CONFIG_H */
> diff --git a/arch/arm/boards/phycard-a-l1/env/config b/arch/arm/boards/phycard-a-l1/env/config
> new file mode 100644
> index 0000000..e121d8a
> --- /dev/null
> +++ b/arch/arm/boards/phycard-a-l1/env/config
> @@ -0,0 +1,82 @@
> +#!/bin/sh
> +
> +machine=pcaal1
> +#user=
> +
> +# Enter MAC address here if not retrieved automatically
> +#eth0.ethaddr=de:ad:be:ef:00:00
> +
> +# use 'dhcp' to do dhcp in barebox and in kernel
> +# use 'none' if you want to skip kernel ip autoconfiguration
> +#ip=dhcp
> +
> +# or set your networking parameters here
> +eth0.ipaddr=192.168.3.11
> +eth0.netmask=255.255.255.0
> +eth0.gateway=192.168.3.10
> +eth0.serverip=192.168.3.10
You shouldn't hardcode ip addresses in the default environment.
> +
> +# can be either 'tftp', 'nfs', 'nand' or 'disk'
> +kernel_loc=nand
> +# can be either 'net', 'nand', 'disk' or 'initrd'
> +rootfs_loc=nand
> +
> +# for flash based rootfs: 'jffs2' or 'ubifs'
> +# in case of disk any regular filesystem like 'ext2', 'ext3', 'reiserfs'
> +rootfs_type=jffs2
Lame... Who uses JFFS2 nowadays?
> +# where is the rootfs in case of 'rootfs_loc=disk' (linux name)
> +rootfs_part_linux_dev=mmcblk0p4
> +rootfsimage=rootfs-${machine}.$rootfs_type
> +
> +# where is the kernel image in case of 'kernel_loc=disk'
> +kernel_part=disk0.2
> +
> +# The image type of the kernel. Can be uimage, zimage, raw or raw_lzo
> +#kernelimage_type=zimage
> +#kernelimage=zImage-$machine
> +kernelimage_type=uimage
> +kernelimage=uImage-$machine
> +#kernelimage_type=raw
> +#kernelimage=Image-$machine
> +#kernelimage_type=raw_lzo
> +#kernelimage=Image-$machine.lzo
We don't need the kernelimage_type anymore. bootm is able to detect and
boot all different kinds of images.
> +
> +bareboximage=barebox-${machine}.bin
> +bareboxenvimage=barebox-${machine}.bin
> +
> +if [ -n $user ]; then
> + bareboximage="$user"-"$bareboximage"
> + bareboxenvimage="$user"-"$bareboxenvimage"
> + kernelimage="$user"-"$kernelimage"
> + rootfsimage="$user"-"$rootfsimage"
> + nfsroot="/home/$user/nfsroot/$machine"
> +else
> + nfsroot="/path/to/nfs/root"
> +fi
> +
> +autoboot_timeout=3
> +
> +bootargs="console=ttyO2,115200"
> +
> +# the following displays are supported
> +# pd050vl1 (640 x 480)
> +# pd035vl1 (640 x 480)
> +# pd104slf (800 x 600)
> +# pm070wl4 (800 x 480)
> +#
> +# omapfb.mode=<display>:<mode>,[,...]
> +# omapfb.debug=<y|n>
> +# - Enable debug printing. You have to have OMAPFB debug support enabled
> +# in kernel config.
> +#
> +bootargs="$bootargs omapdss.def_disp=pd050vl1"
> +#bootargs="$bootargs omapdss.def_disp=pd035vl1"
> +#bootargs="$bootargs omapdss.def_disp=pd104slf"
> +#bootargs="$bootargs omapdss.def_disp=pm070wl4"
> +
> +nand_parts="512k(x-loader)ro,1920k(barebox),128k(bareboxenv),4M(kernel),-(root)"
> +nand_device=omap2-nand.0
> +rootfs_mtdblock_nand=4
> +
> +# set a fancy prompt (if support is compiled in)
> +PS1="\e[1;32mbarebox@\e[1;31m\h:\w\e[0m "
> diff --git a/arch/arm/boards/phycard-a-l1/pca-a-l1.c b/arch/arm/boards/phycard-a-l1/pca-a-l1.c
> new file mode 100644
> index 0000000..a093d66
> --- /dev/null
> +++ b/arch/arm/boards/phycard-a-l1/pca-a-l1.c
> @@ -0,0 +1,356 @@
> +/**
> + * @file
> + * @brief Board Initialization routines for the phyCARD-A-L1
> + *
> + * FileName: arch/arm/boards/phycard-a-l1/pca-a-l1.c
> + *
> + * This board is based on OMAP3530.
> + * More on OMAP3530 (including documentation can be found here):
> + * http://focus.ti.com/docs/prod/folders/print/omap3530.html
> + *
> + * This file provides initialization in two stages:
> + * @li Boot time initialization - just get SDRAM working.
> + * This is run from SRAM - so no case constructs and global vars can be used.
> + * @li Run time initialization - this is for the rest of the initializations
> + * such as flash, uart etc.
> + *
> + * Boot time initialization includes:
> + * @li SDRAM initialization.
> + * @li Pin Muxing relevant for the EVM.
> + *
> + * Run time initialization includes
> + * @li serial @ref serial_ns16550.c driver device definition
> + *
> + * Originally from arch/arm/boards/omap/board-beagle.c
> + */
> +
> +/*
> + * Copyright (C) 2011 Phytec Messtechnik GmbH - http://www.phytec.de/
> + * Juergen Kilb <j.kilb at phytec.de>
> + *
> + * based on code from Texas Instruments / board-beagle.c
> + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
> + * Sanjeev Premi <premi at ti.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * version 2 as published by the Free Software Foundation.
> + *
> + * 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 <console.h>
> +#include <driver.h>
> +#include <errno.h>
> +#include <init.h>
> +#include <nand.h>
> +#include <ns16550.h>
> +#include <partition.h>
> +#include <sizes.h>
> +#include <asm/armlinux.h>
> +#include <asm/io.h>
> +#include <generated/mach-types.h>
> +#include <linux/err.h>
> +#include <mach/control.h>
> +#include <mach/gpmc.h>
> +#include <mach/gpmc_nand.h>
> +#include <mach/omap_hsmmc.h>
> +#include <mach/xload.h>
> +#include <partition.h>
> +#include <nand.h>
> +#include <mach/omap3-mux.h>
> +#include <mach/sdrc.h>
> +#include <mach/silicon.h>
> +#include <mach/sys_info.h>
> +#include <mach/syslib.h>
> +#include <mach/xload.h>
> +
> +#include "pca-a-l1.h"
> +
> +#define SMC911X_BASE 0x2c000000
> +
> +/*
> + * Boot-time initialization(s)
> + */
> +
> +/**
> + * @brief Initialize the SDRC module
> + * Initialisation for 1x256MByte but normally
> + * done by x-loader.
> + * @return void
> + */
> +static void pcaal1_sdrc_init(void)
> +{
> + /* SDRAM software reset */
> + /* No idle ack and RESET enable */
> + writel(0x1A, SDRC_REG(SYSCONFIG));
> + sdelay(100);
> + /* No idle ack and RESET disable */
> + writel(0x18, SDRC_REG(SYSCONFIG));
> +
> + /* SDRC Sharing register */
> + /* 32-bit SDRAM on data lane [31:0] - CS0 */
> + /* pin tri-stated = 1 */
> + writel(0x00000100, SDRC_REG(SHARING));
> +
> + /* ----- SDRC Registers Configuration --------- */
> + /* SDRC_MCFG0 register */
> + writel(0x03588099, SDRC_REG(MCFG_0));
> +
> + /* SDRC_RFR_CTRL0 register */
> + writel(0x0004e201, SDRC_REG(RFR_CTRL_0));
> +
> + /* SDRC_ACTIM_CTRLA0 register */
> + writel(0x629DB4C6, SDRC_REG(ACTIM_CTRLA_0));
> +
> + /* SDRC_ACTIM_CTRLB0 register */
> + writel(0x00011113, SDRC_REG(ACTIM_CTRLB_0));
> +
> + /* Disble Power Down of CKE due to 1 CKE on combo part */
> + writel(0x00000081, SDRC_REG(POWER));
> +
> + /* SDRC_MANUAL command register */
> + /* NOP command */
> + writel(0x00000000, SDRC_REG(MANUAL_0));
> + /* Precharge command */
> + writel(0x00000001, SDRC_REG(MANUAL_0));
> + /* Auto-refresh command */
> + writel(0x00000002, SDRC_REG(MANUAL_0));
> + /* Auto-refresh command */
> + writel(0x00000002, SDRC_REG(MANUAL_0));
> +
> + /* SDRC MR0 register Burst length=4 */
> + writel(0x00000032, SDRC_REG(MR_0));
> +
> + /* SDRC DLLA control register */
> + writel(0x0000000A, SDRC_REG(DLLA_CTRL));
> +
> + return;
unnecessary return
> +}
> +
> +/**
> + * @brief Do the necessary pin muxing required for phyCARD-A-L1.
> + * Some pins in OMAP3 do not have alternate modes.
> + * We don't program these pins.
> + *
> + * See @ref MUX_VAL for description of the muxing mode.
> + *
> + * @return void
> + */
> +static void pcaal1_mux_config(void)
> +{
> + /*
> + * Serial Interface
> + */
> + MUX_VAL(CP(UART3_CTS_RCTX), (IEN | PTD | EN | M0));
> + MUX_VAL(CP(UART3_RTS_SD), (IDIS | PTD | DIS | M0));
> + MUX_VAL(CP(UART3_RX_IRRX), (IEN | PTD | EN | M0));
> + MUX_VAL(CP(UART3_TX_IRTX), (IDIS | PTD | DIS | M0));
> +
> + /* GPMC */
> + MUX_VAL(CP(GPMC_A1), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A2), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A3), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A4), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A5), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A6), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A7), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A8), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A9), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_A10), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D0), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D1), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D2), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D3), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D4), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D5), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D6), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D7), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D8), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D9), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D10), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D11), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D12), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D13), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D14), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_D15), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_NCS0), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(GPMC_NADV_ALE), (IDIS | PTD | DIS | M0));
> + MUX_VAL(CP(GPMC_NOE), (IDIS | PTD | DIS | M0));
> + MUX_VAL(CP(GPMC_NWE), (IDIS | PTD | DIS | M0));
> + MUX_VAL(CP(GPMC_NBE0_CLE), (IDIS | PTD | DIS | M0));
> + MUX_VAL(CP(GPMC_NWP), (IEN | PTD | DIS | M0));
> + MUX_VAL(CP(GPMC_WAIT0), (IEN | PTU | EN | M0));
> +
> + /* ETH_PME (GPIO_55) */
> + MUX_VAL(CP(GPMC_NCS4), (IDIS | PTU | EN | M4));
> + /* #CS5 (Ethernet) */
> + MUX_VAL(CP(GPMC_NCS5), (IDIS | PTU | EN | M0));
> + /* ETH_FIFO_SEL (GPIO_57) */
> + MUX_VAL(CP(GPMC_NCS6), (IDIS | PTD | EN | M4));
> + /* ETH_AMDIX_EN (GPIO_58) */
> + MUX_VAL(CP(GPMC_NCS7), (IDIS | PTU | EN | M4));
> + /* ETH_nRST (GPIO_64) */
> + MUX_VAL(CP(GPMC_WAIT2), (IDIS | PTU | EN | M4));
> +
> + /* HSMMC1 */
> + MUX_VAL(CP(MMC1_CLK), (IDIS | PTU | EN | M0));
> + MUX_VAL(CP(MMC1_CMD), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(MMC1_DAT0), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(MMC1_DAT1), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(MMC1_DAT2), (IEN | PTU | EN | M0));
> + MUX_VAL(CP(MMC1_DAT3), (IEN | PTU | EN | M0));
> +
> + /* USBOTG_nRST (GPIO_63) */
> + MUX_VAL(CP(GPMC_WAIT1), (IDIS | PTU | EN | M4));
> +
> + /* USBH_nRST (GPIO_65) */
> + MUX_VAL(CP(GPMC_WAIT3), (IDIS | PTU | EN | M4));
> +}
> +
> +/**
> + * @brief The basic entry point for board initialization.
> + *
> + * This is called as part of machine init (after arch init).
> + * This is again called with stack in SRAM, so not too many
> + * constructs possible here.
> + *
> + * @return void
> + */
> +void board_init(void)
> +{
> + int in_sdram = running_in_sdram();
> +
> + pcaal1_mux_config();
Do you have to do this so early? I see no SDRAM pins in the list so I
suppose no.
> + /* Dont reconfigure SDRAM while running in SDRAM! */
> + if (!in_sdram)
> + pcaal1_sdrc_init();
> +}
> +
> +/*
> + * Run-time initialization(s)
> + */
> +
> +#ifdef CONFIG_DRIVER_SERIAL_NS16550
I really don't like all these #ifdef CONFIG_bla, especially for such
vital devices like the console.
> +
> +static struct NS16550_plat serial_plat = {
> + .clock = 48000000, /* 48MHz (APLL96/2) */
> + .shift = 2,
> +};
> +
> +/**
> + * @brief Initialize the serial port to be used as console.
> + *
> + * @return result of device registration
> + */
> +static int pcaal1_init_console(void)
> +{
> + add_ns16550_device(-1, OMAP_UART3_BASE, 1024, IORESOURCE_MEM_8BIT,
> + &serial_plat);
> +
> + return 0;
> +}
> +console_initcall(pcaal1_init_console);
> +#endif /* CONFIG_DRIVER_SERIAL_NS16550 */
> +
> +#ifdef CONFIG_DRIVER_NET_SMC911X
> +/** GPMC timing for our SMSC9221 device */
> +static struct gpmc_config smsc_cfg = {
> + .cfg = {
> + 0x41001000, /*CONF1 */
> + 0x00040500, /*CONF2 */
> + 0x00000000, /*CONF3 */
> + 0x04000500, /*CONF4 */
> + 0x05050505, /*CONF5 */
> + 0x000002c1, /*CONF6 */
> +},
> + .base = SMC911X_BASE,
> + /* GPMC address map as small as possible */
> + .size = GPMC_SIZE_16M,
> +};
Strange indention here.
> +
> +/*
> + * Routine: setup_net_chip
> + * Description: Setting up the configuration GPMC registers specific to the
> + * Ethernet hardware.
> + */
> +static void pcaal1_setup_net_chip(void)
> +{
> + gpmc_cs_config(5, &smsc_cfg);
> +}
> +#endif
> +
> +static int pcaal1_mem_init(void)
> +{
> +
> +#ifdef CONFIG_GPMC
> + /*
> + * WP is made high and WAIT1 active Low
> + */
> + gpmc_generic_init(0x10);
> +#endif
> +
> + arm_add_mem_device("ram0", OMAP_SDRC_CS0, get_sdr_cs_size(SDRC_CS0_OSET));
> +
> + if ((get_sdr_cs_size(SDRC_CS1_OSET) != 0) && (get_sdr_cs1_base() != OMAP_SDRC_CS0))
> + arm_add_mem_device("ram1", get_sdr_cs1_base(), get_sdr_cs_size(SDRC_CS1_OSET));
> +
> + return 0;
> +}
> +mem_initcall(pcaal1_mem_init);
> +
> +#ifdef CONFIG_MCI_OMAP_HSMMC
> +struct omap_hsmmc_platform_data pcaal1_hsmmc_plat = {
> + .f_max = 26000000,
> +};
> +#endif
> +
> +static int pcaal1_init_devices(void)
> +{
> +#ifdef CONFIG_MCI_OMAP_HSMMC
> + add_generic_device("omap-hsmmc", -1, NULL, OMAP_MMC1_BASE, SZ_4K,
> + IORESOURCE_MEM, &pcaal1_hsmmc_plat);
> +#endif
> +
> +#ifdef CONFIG_DRIVER_NET_SMC911X
> + pcaal1_setup_net_chip();
> + add_generic_device("smc911x", -1, NULL, SMC911X_BASE, SZ_4K,
> + IORESOURCE_MEM, NULL);
> +#endif
> +
> + armlinux_set_bootparams((void *)0x80000100);
> + armlinux_set_architecture(MACH_TYPE_PCAAL1);
> +
> + return 0;
> +}
> +device_initcall(pcaal1_init_devices);
> +
> +static int pcaal1_late_init(void)
> +{
> + struct device_d *nand;
> +
> + gpmc_generic_nand_devices_init(0, 16, OMAP_ECC_SOFT);
Why software ecc?
> +
> + nand = get_device_by_name("nand0");
> +
> + devfs_add_partition("nand0", 0x00000, 0x80000, PARTITION_FIXED, "x-loader");
> + dev_add_bb_dev("self_raw", "x_loader0");
> +
> + devfs_add_partition("nand0", 0x80000, 0x1e0000, PARTITION_FIXED, "self_raw");
> + dev_add_bb_dev("self_raw", "self0");
> +
> + devfs_add_partition("nand0", 0x260000, 0x20000, PARTITION_FIXED, "env_raw");
> + dev_add_bb_dev("env_raw", "env0");
> +
> + return 0;
> +}
> +late_initcall(pcaal1_late_init);
> diff --git a/arch/arm/boards/phycard-a-l1/pca-a-l1.h b/arch/arm/boards/phycard-a-l1/pca-a-l1.h
> new file mode 100644
> index 0000000..b931d8c
> --- /dev/null
> +++ b/arch/arm/boards/phycard-a-l1/pca-a-l1.h
> @@ -0,0 +1,35 @@
> +/**
> + * @file
> + * @brief exported generic APIs which various board files implement
> + *
> + * FileName: arch/arm/boards/phycard-a-l1/board.h
> + *
> + * This file will not contain any board specific implementations.
> + */
> +/*
> + * (C) Copyright 2008
> + * Texas Instruments, <www.ti.com>
> + * Raghavendra KH <r-khandenahally at ti.com>
> + *
> + * 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 __BOARD_OMAP_H_
> +#define __BOARD_OMAP_H_
> +
> +/** Generic Board initialization called from platform.S */
> +void board_init(void);
> +
> +#endif /* __BOARD_OMAP_H_ */
> diff --git a/arch/arm/boards/phycard-a-l1/platform.S b/arch/arm/boards/phycard-a-l1/platform.S
> new file mode 100644
> index 0000000..596d3ab
> --- /dev/null
> +++ b/arch/arm/boards/phycard-a-l1/platform.S
> @@ -0,0 +1,65 @@
> +/**
> + * @file
> + * @brief Wrapper to call board level initialization routine
> + *
> + * FileName: arch/arm/boards/phycard-a-l1/platform.S
> + *
> + * board_init_lowlevel is defined here. This calls board_init which
> + * is linked to the binary - the board_init only has a SRAM stack.
> + * so it needs to be careful about the usage of global variables
> + * and the likes. Enabled only if CONFIG_MACH_DO_LOWLEVEL_INIT is
> + * defined
> + */
> +/*
> + * (C) Copyright 2006-2008
> + * Texas Instruments, <www.ti.com>
> + * Nishanth Menon <x0nishan at ti.com>
> + *
> + * 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 <config.h>
> +#include <mach/silicon.h>
> +
> +#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
> +/**
> + * @fn void board_init_lowlevel(void)
> + *
> + * @brief This provides a assembly wrapper setting up SRAM before calling
> + * board_init
> + *
> + * @return void
> + */
> +.globl board_init_lowlevel
> +board_init_lowlevel:
> + /* Setup a temporary stack so that we can call C functions
> + * Yes. this might have been already done by arch code.
> + * No harm in being a bit redundant to avoid future complications
> + */
> + ldr sp, SRAM_STACK
> + str ip, [sp] /* stash old link register */
> + str lr, [sp] /* stash current link register */
> + mov ip, lr /* save link reg across call */
> + /* Do the pin muxes, sdram init etc..board-xxx.c */
> + bl board_init
> + ldr lr, [sp] /* restore current link register */
> + ldr ip, [sp] /* restore save ip */
> + /* back to arch calling code */
> + mov pc, lr
> +SRAM_STACK:
> + .word OMAP_SRAM_STACK
> +
How about this instead?
static void __naked board_init_lowlevel(void)
{
uint32_t r;
/* setup a stack */
r = OMAP_SRAM_STACK;
__asm__ __volatile__("mov sp, %0" : : "r"(r));
board_init();
board_init_lowlevel_return();
}
(You can also move the code from board_init() into this function)
> +CONFIG_CMD_MTEST=y
> +CONFIG_CMD_MTEST_ALTERNATIVE=y
> +CONFIG_CMD_FLASH=y
> +CONFIG_CMD_UBI=y
> +CONFIG_CMD_BOOTM=y
> +CONFIG_CMD_BOOTM_SHOW_TYPE=y
> +CONFIG_CMD_IMINFO=y
> +CONFIG_CMD_BOOTZ=y
> +CONFIG_CMD_BOOTU=y
Try to disable bootz and bootu and use bootm instead.
Sascha
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