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libflashrom: Add layout "exclude" API

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Layouts can be expensive to derive (reading from flash), so we might
want to reuse a layout for different purposes. Today, it's not possible
to undo a flashrom_layout_include_region() operation (to, say, operate
on a different region). Add such an API.

Change-Id: I7ea3e0674f25e34bf2cfc8f464ae7ca1c1a3fbfd
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/76005
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Nikolai Artemiev <nartemiev@google.com>
This commit is contained in:
Brian Norris
2023-06-22 11:07:18 -07:00
committed by Edward O'Callaghan
parent 91aa2d8526
commit e08899fcf4
5 changed files with 58 additions and 0 deletions
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16
layout.c
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@ -217,6 +217,17 @@ static int include_region(struct flashrom_layout *const l, const char *name,
return 1;
}
/* returns 0 to indicate success, 1 to indicate failure */
static int exclude_region(struct flashrom_layout *const l, const char *name)
{
struct romentry *const entry = _layout_entry_by_name(l, name);
if (entry) {
entry->included = false;
return 0;
}
return 1;
}
/* returns -1 if an entry is not found, 0 if found. */
static int romentry_exists(struct flashrom_layout *const l, char *name, char *file)
{
@ -441,6 +452,11 @@ int flashrom_layout_include_region(struct flashrom_layout *const layout, const c
return include_region(layout, name, NULL);
}
int flashrom_layout_exclude_region(struct flashrom_layout *const layout, const char *name)
{
return exclude_region(layout, name);
}
int flashrom_layout_get_region_range(struct flashrom_layout *const l, const char *name,
unsigned int *start, unsigned int *len)
{