Commit graph

13 commits

Author SHA1 Message Date
Aidan MacDonald
a980d5f869 x1000: Enable support for INIT_ATTR
Enable INIT_ATTR support in config.h. Load init code to the
codec buffer, following the convention used by other targets
that support INIT_ATTR.

Change-Id: I8935fbaa100f0013bb328d71c4a49ec2ffafd003
2022-12-31 08:10:41 -05:00
Aidan MacDonald
e8ad52be94 x1000: Rename crt0 .init sections to .startup
Avoid startup code clashing with the .init section, which is
by convention used for INIT_ATTR code that can be discarded
after app initialization.

Change-Id: Id59b7618ef41e65c33fc0f133644e07555a913eb
2022-12-18 22:14:22 +00:00
Aidan MacDonald
744ea2ff43 x1000: Allow SPL and bootloader to pass arguments to next stage
Change-Id: I61591d704c14acf06cd192a6e9355f0a9c25d0d8
2022-10-28 20:32:38 +01:00
Aidan MacDonald
4bd97c6535 mips: consolidate exception handling, add exception backtraces
Merge the x1000 and jz47xx exception handling code since they use
the same exception vectors and handlers. The interrupt handler is
now called from the common exception vector, but remains separate
for each board since they have different IRQ layouts.

The new exception handler can provide a stack traceback from the
interrupted code, rather than the (uninteresting) caller traceback
displayed by panicf. This allows you to see what led up to a null
pointer deref or division by zero, which makes it _much_ easier to
track down errors that occur in common leaf functions like strcmp.

Change-Id: I59a0ebb5e40fcb36505c3bfdb47f8cac2f9936b1
2022-10-17 09:04:18 -04:00
Aidan MacDonald
5ee9a45126 mips: stop backtraces at main()
Initialize ra=0 before calling main so backtraces don't walk
through the startup code.

Change-Id: Ia8796ce38b32d14025b47b3e00061267ee25cbaf
2022-05-22 07:16:11 -04:00
Aidan MacDonald
7243f6b343 x1000: Add multiboot support
Enables multiboot for the FiiO M3K, Shanling Q1, and Eros Q native port.
Note this requires an up-to-date Rockbox _and_ bootloader.

Usage instructions will (eventually) be found on the wiki:
https://www.rockbox.org/wiki/MultibootBootloader

Change-Id: Ia2da1ad6ef611e499d2fbafa93838387bc1023ba
2022-03-27 10:35:02 -04:00
Aidan MacDonald
67f7d399e5 x1000: restore crt0.S cache flush
I-cache must be flushed after copying code to IRAM... duh.

Change-Id: I6eacc4b7c4385175724c947f6c53f7bbddcb6295
2022-03-16 23:21:29 +00:00
Aidan MacDonald
c676736792 x1000: optimize crt0.S, improve correctness
Replace inline section copy/fill loops with subroutines, which
reduces code size a bit and and handle zero size copies properly.

Remove the cache initialization loop as well. There's no actual
reason for this because the SPL initializes the caches and just
dropping the cache can even be harmful (in this case it wasn't,
because the SPL flushes the whole cache right before calling in).

Change-Id: I7cddc9ed6d060b1f1bdd75544297883d014cad2d
2022-03-16 12:02:24 -04:00
Aidan MacDonald
8b4949381c x1000: add TCSM section to linker script
This is intended for debugging OF kernel boot problems and has
to be enabled manually at compile time to make it usable.

Change-Id: Ie5ce9f0a7639be0acf5e3879cfc3a7b8b89caa5c
2022-03-12 14:50:45 -05:00
Aidan MacDonald
ca12478df6 x1000: add simple binary header to declare the load address
The header format is basic, a variable length list of values
tagged by 4-byte strings. The main application to to allow a
loader to determine the load address of the binary at runtime
instead of using a hardcoded address. But the header contents
aren't fixed and it could be extended for other purposes too.

Change-Id: If51d85b4c2eb53c919a91b54985b157e8e5c20ef
2022-03-06 23:22:49 +00:00
Aidan MacDonald
0e1a90ea1d x1000: SPL refactoring
This streamlines the boot code a bit and reduces target specific
boilerplate. The clock init hack used by the bootloader has been
"standardized" and works for the main Rockbox binary now, so you
can boot rockbox.bin over USB without special hacks.

Change-Id: I7c1fac37df5a45873583ce6818eaedb9f71a782b
2021-07-08 16:01:38 +00:00
Aidan MacDonald
3f26fcf340 FiiO M3K: New bootloader
SPL and UCL-compressed bootloader are now packed into one output,
bootloader.m3k, eliminating the separate SPL build phase.

The Rockbox bootloader now has a recovery menu, accessible by
holding VOL+ when booting, that lets you back up, restore, and
update the bootloader from the device.

Change-Id: I642c6e5fb83587a013ab2fbfd1adab439561ced2
2021-05-12 10:35:20 +00:00
Aidan MacDonald
3ec66893e3 New port: FiiO M3K on bare metal
Change-Id: I7517e7d5459e129dcfc9465c6fbd708619888fbe
2021-03-28 00:01:37 +00:00