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multiboot: Allow searching in volume 0 for redirect file

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Searching in volume 0 is necessary for multiboot targets with only
one drive, like the M3K/Q1/ErosQ. Without this the search code will
never look at the redirect file on these targets.

The search bound is configured with a setting MULTIBOOT_MIN_VOLUME,
which defaults to 0, but is defined to 1 for Sansa players so they
keep their old behavior.

Change-Id: I6dc5cf98db4258731de2c68c3ab1182b4a4a655b
This commit is contained in:
Aidan MacDonald 2022-03-07 11:36:00 +00:00
parent df3afcfa3b
commit bcbb5a8b00
8 changed files with 13 additions and 1 deletions
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6
firmware/export/config.h
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@ -869,6 +869,12 @@ Lyre prototype 1 */
#define HAVE_MULTIBOOT
#endif
/* The lowest numbered volume to read a multiboot redirect from; default is to
* allow any volume but some targets may wish to exclude the internal drive. */
#if defined(HAVE_MULTIBOOT) && !defined(MULTIBOOT_MIN_VOLUME)
# define MULTIBOOT_MIN_VOLUME 0
#endif
#ifndef NUM_DRIVES
#define NUM_DRIVES 1
#endif