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distro: Add efi pxe boot code

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Now that we can expose network functionality to EFI applications,
the logical next step is to load them via pxe to execute them as
well.

This patch adds the necessary bits to the distro script to automatically
load and execute EFI payloads. It identifies the dhcp client as a uEFI
capable PXE client, hoping the server returns a tftp path to a workable
EFI binary that we can then execute.

To enable boards that don't come with a working device tree preloaded,
this patch also adds support to load a device tree from the /dtb directory
on the remote tftp server.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Alexander Graf
2016-05-06 21:01:07 +02:00
committed by Tom Rini
parent 210be5c4cb
commit 20898ea934
2 changed files with 57 additions and 3 deletions
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13
net/bootp.c
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@@ -413,12 +413,21 @@ static void bootp_timeout_handler(void)
static u8 *add_vci(u8 *e)
{
char *vci = NULL;
char *env_vci = getenv("bootp_vci");
#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
put_vci(e, CONFIG_SPL_NET_VCI_STRING);
vci = CONFIG_SPL_NET_VCI_STRING;
#elif defined(CONFIG_BOOTP_VCI_STRING)
put_vci(e, CONFIG_BOOTP_VCI_STRING);
vci = CONFIG_BOOTP_VCI_STRING;
#endif
if (env_vci)
vci = env_vci;
if (vci)
put_vci(e, vci);
return e;
}