[U-Boot] [PATCH v3 0/8] riscv: Enable efi_loader support

Mon May 7 02:13:50 UTC 2018

> -----Original Message-----
> From: Alexander Graf [mailto:agraf at suse.de]
> Sent: Monday, May 07, 2018 4:59 AM
> To: u-boot at lists.denx.de
> Cc: Heinrich Schuchardt; schwab at suse.de; Greentime Hu; Rick Jian-Zhi Chen(陳
> 建志)
> Subject: Re: [U-Boot] [PATCH v3 0/8] riscv: Enable efi_loader support
>
>
>
> On 23.04.18 07:59, Alexander Graf wrote:
> > We now have RISC-V support in U-Boot - which is great!
> >
> > However, not that we're finally making progress to converge on
> > efi_loader and distro boot for booting on ARM platforms, we really
> > want to make sure there is no technical reason not to do the same on
> > RISC-V as well.
> >
> > So this patch set introduces distro boot and efi_loader support for
> > RISC-V!
> >
> > So far, I've only tested it with the selftest and hello world target
> > in U-Boot, as the number of target binaries to run is still slim. But
> > it should at least give us a good starting point.
>
> Rick, can this go into 2018.07?
>
> Via which tree do you want to push it? I can take it via the efi one or you can take
> it if you like ;).
>
>

Yes
I prefer to u-boot-riscv.git
If this can enter main line, I will fetch it
I think you can take it via the efi one. :)

But when I verify the efi flow this days.
I find one issue and still clarify it now.

I find the auto flow can not be disabled from make menuconfig
Following are the experiments I do:

Currently the boot flow will auto scan *.efi file from sd card and tftp server.
If I do not insert sd card and tftp server caple.

The boot message will as below:

U-Boot 2018.03-00351-g1dd246f-dirty (Apr 23 2018 - 15:34:32 +0800)

DRAM:  1 GiB
No arch specific invalidate_icache_all available!
MMC:
Loading Environment from SPI Flash... SF: Detected mx25u1635e with page size 256 Bytes, erase size 4 KiB, total 2 MiB
*** Warning - bad CRC, using default environment

Failed (-5)
In:    serial at f0300000
Out:   serial at f0300000
Err:   serial at f0300000
Net:   no alias for ethernet0

Warning: mac at e0100000 (eth0) using random MAC address - 66:7d:d7:be:c0:10
eth0: mac at e0100000
Hit any key to stop autoboot:  0
No MMC device available
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
BOOTP broadcast 6
BOOTP broadcast 7
BOOTP broadcast 8
BOOTP broadcast 9
BOOTP broadcast 10
BOOTP broadcast 11
BOOTP broadcast 12
BOOTP broadcast 13
BOOTP broadcast 14
BOOTP broadcast 15
BOOTP broadcast 16
BOOTP broadcast 17

Retry time exceeded; starting again
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
BOOTP broadcast 6
BOOTP broadcast 7
BOOTP broadcast 8
BOOTP broadcast 9
BOOTP broadcast 10
BOOTP broadcast 11
BOOTP broadcast 12
BOOTP broadcast 13
BOOTP broadcast 14
BOOTP broadcast 15
BOOTP broadcast 16
BOOTP broadcast 17

Retry time exceeded; starting again
RISC-V #

Then I think if I don't want enter this auto flow, what can I do ?

1 Remove CONFIG_DISTRO_DEFAULTS=y from nx25-ae250_defconfig
 But it still enter auto flow.

2 Add #ifdef CONFIG_DISTRO_DEFAULTS to encapsulate the CONFIG_EXTRA_ENV_SETTINGS in nx25-ae250.h
 And Remove CONFIG_DISTRO_DEFAULTS=y from nx25-ae250_defconfig
 And it will NOT enter auto flow

#ifdef CONFIG_DISTRO_DEFAULTS
/* Enable distro boot */
#define BOOT_TARGET_DEVICES(func) \
        func(MMC, mmc, 0) \
        func(DHCP, dhcp, na)

#include <config_distro_bootcmd.h>

#define CONFIG_EXTRA_ENV_SETTINGS       \
                                "kernel_addr_r=0x00080000\0" \
                                "pxefile_addr_r=0x01f00000\0" \
                                "scriptaddr=0x01f00000\0" \
                                "fdt_addr_r=0x02000000\0" \
                                "ramdisk_addr_r=0x02800000\0" \
                                BOOTENV
#endif

3 Add #ifdef CONFIG_DISTRO_DEFAULTS to encapsulate the CONFIG_EXTRA_ENV_SETTINGS in nx25-ae250.h
 And do NOT Remove CONFIG_DISTRO_DEFAULTS=y from nx25-ae250_defconfig
 But disable CONFIG_DISTRO_DEFAULTS from make menuconfig
   General setup  --->
     [ ] Select defaults suitable for booting general purpose Linux distributions
 And it still enter auto flow

Offering this information for you.

Rick

> Alex
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