Re: [Xen-devel] bootwrapper can't be compiled for cubieboard2

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

On 08/30/2013 03:12 PM, Ian Campbell wrote:
> On Fri, 2013-08-30 at 10:51 +0100, Ian Campbell wrote:
> > I'll try that shortly and let you know how I get on.
> Success! My failure previously was not getting the kernel command line
> in the right place, so no printk...
Excellent! Great news! Seems I need to shell out those 70 EUR now ;-)

Thanks!
Andre.

P.S. Keep my fingers cross for the Xen boot.

> Starting from
> https://github.com/linux-sunxi/u-boot-sunxi.git sunxi
> I merged your stuff:
> git pull git://git.linaro.org/people/aprzywara/u-boot.git hypmode_v4
> and applied the patch below (NB: u-boot doesn't support SMP on this
> platform yet, hence stubbing out the kicking of secondaries etc) and
> https://groups.google.com/forum/#!topic/linux-sunxi/7oS0CM2WSy4.
>
> Then built with:
>
> $ make Cubieboard2_FEL CROSS_COMPILE=arm-linux-gnueabihf-
>
> Then I could boot via FEL (http://linux-sunxi.org/FEL/USBBoot) using
> usb-boot from git://github.com/linux-sunxi/sunxi-tools.git:
> usb-boot ~/devel/u-boot.git/spl/u-boot-spl.bin ~/devel/u-boot.git/u-boot.bin 
> uImage
>
> where uImage is the zImage+dtb (cat into tmp) and mkimage -A arm -O
> linux -T kernel -a 0x40008000 -e 0x40008000 -C none -d tmp uImage
>
> Linux says:
> [    0.000000] CPU: All CPU(s) started in HYP mode.
> [    0.000000] CPU: Virtualization extensions available.
>
> (All == all 1)
>
> Kernel is https://github.com/mripard/linux.git sunxi-next-a20-cubie2
> multi_v7_defconfig + CONFIG_DEBUG_LL w/ CONFIG_DEBUG_SUNXI_UART0 and
> CONFIG_EARLY_PRINTK.
> I used appended dtb and set /chosen/bootargs = "console=ttyS0,115200
> earlyprintk" in arch/arm/boot/dts/sun7i-a20-cubieboard2.dts (only
> because usb-boot doesn't happen to load dtb and pass it to bootm, will
> fix that up...)
>
> Now to try Xen!
>
> Ian.
>
> commit 9267730ab1c3b6be5cf9118b2ce4e708e9d4ba66
> Author: Ian Campbell <ijc@xxxxxxxxxxxxxx>
> Date:   Fri Aug 30 13:52:07 2013 +0100
>
>      sunxi: Enable hyp mode boot on sunxi platforms
>
>      Required a call to cleanup_before_linux in order to disable caches before
>      switching to NS world, otherwise we switch to an incorrecly configured 
> banked
>      version of SCTLR.
>
>      Signed-off-by: Ian Campbell <ijc@xxxxxxxxxxxxxx>
>
> diff --git a/arch/arm/cpu/armv7/virt-v7.c b/arch/arm/cpu/armv7/virt-v7.c
> index 4dc8c45..a76dcf7 100644
> --- a/arch/arm/cpu/armv7/virt-v7.c
> +++ b/arch/arm/cpu/armv7/virt-v7.c
> @@ -132,6 +132,8 @@ int armv7_switch_nonsec(void)
>         unsigned int reg;
>         unsigned itlinesnr, i;
>
> +       cleanup_before_linux();
> +
>         /* check whether the CPU supports the security extensions */
>         reg = read_id_pfr1();
>         if ((reg & 0xF0) == 0) {
> diff --git a/board/sunxi/Makefile b/board/sunxi/Makefile
> index 4780c99..d756091 100644
> --- a/board/sunxi/Makefile
> +++ b/board/sunxi/Makefile
> @@ -76,9 +76,13 @@ COBJS-$(CONFIG_UHOST_U1A)    += dram_sun4i_360_1024_iow8.o
>   COBJS-$(CONFIG_WOBO_I5)               += dram_wobo_i5.o
>   COBJS-$(CONFIG_XZPAD700)      += dram_xzpad700.o
>
> +ifneq ($(CONFIG_ARMV7_NONSEC)$(CONFIG_ARMV7_VIRT),)
> +SOBJS                           := smp.o
> +endif
> +
>   COBJS := $(COBJS-y)
> -SRCS   := $(COBJS:.o=.c)
> -OBJS   := $(addprefix $(obj),$(COBJS))
> +SRCS   := $(COBJS:.o=.c) $(SOBJS:.o=.S)
> +OBJS   := $(addprefix $(obj),$(COBJS) $(SOBJS))
>
>   all:  $(LIB)
>
> diff --git a/board/sunxi/board.c b/board/sunxi/board.c
> index 50c07e2..4b8c732 100755
> --- a/board/sunxi/board.c
> +++ b/board/sunxi/board.c
> @@ -40,6 +40,20 @@
>
>   DECLARE_GLOBAL_DATA_PTR;
>
> +/* Setting the address at which secondary cores start from.
> + * SMP currently unsupported.
> + */
> +void smp_set_core_boot_addr(unsigned long addr, int corenr)
> +{
> +       printf("WARNING: ignoring attempt to set core boot address %lx on core 
> %d\n",
> +              addr, corenr);
> +}
> +
> +void smp_kick_all_cpus(void)
> +{
> +       printf("WARNING: Not kicking secondary CPUs\n");
> +}
> +
>   /* add board specific code here */
>   int board_init(void)
>   {
> diff --git a/board/sunxi/smp.S b/board/sunxi/smp.S
> new file mode 100644
> index 0000000..6a6e08c
> --- /dev/null
> +++ b/board/sunxi/smp.S
> @@ -0,0 +1,33 @@
> +/*
> + * code for redirecting secondary cores to their start address
> + *
> + * Copyright (c) 2013  Andre Przywara <andre.przywara@xxxxxxxxxx>
> + *
> + * 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 <config.h>
> +#include <linux/linkage.h>
> +
> +/* void _smp_waitloop(unsigned previous_address); */
> +ENTRY(smp_waitloop)
> +       /* SMP currently unsupported */
> +1:     wfi
> +       b 1b
> +ENDPROC(smp_waitloop)
> diff --git a/include/configs/sun7i.h b/include/configs/sun7i.h
> index a6ede2a..f0d9222 100644
> --- a/include/configs/sun7i.h
> +++ b/include/configs/sun7i.h
> @@ -34,6 +34,8 @@
>   #define CONFIG_SYS_PROMPT             "sun7i# "
>   #define CONFIG_MACH_TYPE              4283
>
> +#define CONFIG_ARMV7_VIRT
> +
>   #if defined(CONFIG_SYS_SECONDARY_ON)
>   #define CONFIG_BOARD_POSTCLK_INIT 1
>   #endif

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