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bootstd: Add a new pre-scan priority for bootdevs

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We need extensions to be set up before we start trying to boot any of the
bootdevs. Add a new priority before all the others for tht sort of thing.
Also add a 'none' option, so that the first one is not 0.

While we are here, comment enum bootdev_prio_t fully and expand the test
for the 'bootdev hunt' command.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2023-01-17 10:48:08 -07:00 • committed by Tom Rini
parent 79a7d4a61f
commit eacc261178
12 changed files with 84 additions and 44 deletions
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35
include/bootdev.h
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@ -21,15 +21,36 @@ struct udevice;
*
* Smallest value is the highest priority. By default, bootdevs are scanned from
* highest to lowest priority
*
* BOOTDEVP_0_NONE: Invalid value, do not use
* @BOOTDEVP_6_PRE_SCAN: Scan bootdevs with this priority always, before
* starting any bootflow scan
* @BOOTDEVP_2_INTERNAL_FAST: Internal devices which don't need scanning and
* generally very quick to access, e.g. less than 100ms
* @BOOTDEVP_3_INTERNAL_SLOW: Internal devices which don't need scanning but
* take a significant fraction of a second to access
* @BOOTDEVP_4_SCAN_FAST: Extenal devices which need scanning or bus
* enumeration to find, but this enumeration happens quickly, typically under
* 100ms
* @BOOTDEVP_5_SCAN_SLOW: Extenal devices which need scanning or bus
* enumeration to find. The enumeration takes significant fraction of a second
* to complete
* @BOOTDEVP_6_NET_BASE: Basic network devices which are quickly and easily
* available. Typically used for an internal Ethernet device
* @BOOTDEVP_7_NET_FALLBACK: Secondary network devices which require extra time
* to start up, or are less desirable. Typically used for secondary Ethernet
* devices. Note that USB ethernet devices are found during USB enumeration,
* so do not use this priority
*/
enum bootdev_prio_t {
BOOTDEVP_0_INTERNAL_FAST = 10,
BOOTDEVP_1_INTERNAL_SLOW = 20,
BOOTDEVP_2_SCAN_FAST = 30,
BOOTDEVP_3_SCAN_SLOW = 40,
BOOTDEVP_4_NET_BASE = 50,
BOOTDEVP_5_NET_FALLBACK = 60,
BOOTDEVP_6_SYSTEM = 70,
BOOTDEVP_0_NONE,
BOOTDEVP_1_PRE_SCAN,
BOOTDEVP_2_INTERNAL_FAST,
BOOTDEVP_3_INTERNAL_SLOW,
BOOTDEVP_4_SCAN_FAST,
BOOTDEVP_5_SCAN_SLOW,
BOOTDEVP_6_NET_BASE,
BOOTDEVP_7_NET_FALLBACK,
BOOTDEVP_COUNT,
};