rockbox/utils/hwstub/stub, branch master

hwstub: rewrite exception catching

2017-01-24T14:34:19+00:00

Since we can catch exceptions like data aborts on read/write, it takes very
little to also catch exceptions in calls. When extending this with the catching
of illegal instructions, the call instruction now becomes much more robust and
also for address and instruction probing. Since we can catch several types of
exception, rename set_data_abort_jmp to set_exception_jmp. At the same time,
simplify the logic in read/write request handlers. Also fix a bug in ARM
jump code: it was using
  stmia r1, {..., pc}
as if pc would get current pc + 8 but this is actually implementation defined
on older ARMs (typically pc + 12) and deprecated on newer ARMs, so rewrite the
code avoid that. The set_exception_jmp() function now also reports the exception
type.

Change-Id: Icd0dd52d2456b361b27c4776be09c3d13528ed93

hwstub/jz460b: implement exception recovery

2017-01-24T14:34:19+00:00

Now that we now that jz4760b implements EBASE, we can use it to rebase
exceptions to use a k1seg address, that maps to the physical address of the
TCSM0. It requires to enable HAB1 to have this translation. This most the most
inefficient way to access tighly coupled memory ever, but it works.

Change-Id: I894ca929c9835696102eb2fef44b06e6eaf96d44

hwstub/jz4760b: build packtools automatically if neeeded

2017-01-24T14:31:05+00:00

Change-Id: I543e405bf75868d0f7509a35e08fe31ed253e0e6

hwstub: add verbose mode to make

2017-01-24T14:31:05+00:00

Use make V=1 to print all commands

Change-Id: I28bd4151178413f10ddab292f1d582a9d019f5ea

hwstub: add support for coprocessor operations

2017-01-24T14:25:14+00:00

At the moment the stub only implement them for MIPS.

Change-Id: Ica835a0e9c70fa5675c3d655eae986e812a47de8

hwstub: add the possibility to flush caches before exec

2017-01-24T14:25:14+00:00

This is needed on the jz4760b because if some data is loaded to DRAM, then it
is cached and a disaster lurks if dcaches/icache are not flushed. Targets that
needs this must define CONFIG_FLUSH_CACHES in target-config.h and implement
target_flush_caches(). Currently MIPS has some generic code for mips32r1 that
requires to define {D,I}CACHE_SIZE and {D,I}CACHE_LINE_SIZE in target-config.h

Change-Id: I5a3fc085de9445d8c8a2eb61ae4e2dc9bb6b4e8e

hwstub: add jz4760b stub

2017-01-24T14:22:27+00:00

The stub is quite versatile: it can be loaded using bootrom or another other
means (like factory boot on Fiio X1). It relocates itself to TCSM0 and provides
basic functionality (it does not recover from failed read/writes at the moment).

Change-Id: Ib646a4b43fba9358d6f93f0f73a5c2e9bcd775a7

ATJ hwstub make irq based usb driver work

2016-11-10T12:57:02+00:00

0e2b490 introduced rework of usb driver which was broken. It was reverted
in f2da975 to restore hwstub functionality on ATJ.

This commit reenables usb rework AND fixes remining issues.
The problem was with 0 length OUT thransfers. Additionally
a few cleanups were made.

Change-Id: I529ea9ad6540509e9287ca7e1cd2b44369b03cbb

Revert "hwstub: rework usb driver for atj213x"

2016-11-08T07:37:24+00:00

This reverts commit 0e2b4908d012dbd45a58002774f32b64ea8f83e3.

Although I swear it was tested it apparently broke hwstub on atj.
I will need to investigate more whats going on. Revert for now.

Change-Id: I2ff3adf8c72bb0e53be7d81b975382adfb700eab

hwstub: rewrite and expand library

2016-04-08T17:37:30+00:00

Rewrite the hwstub library in C++, with a clean and modular design.
The library was designed from the ground up to be aware of multithreading
issues and to handle memory allocation nicely with shared pointers.

Compared to the original library, it brings the following major features:
- support for JZ boot devices, it is very easy to add support for others
- support for network transparent operations (through sockets): both tcp
  and unix domains are support

Change-Id: I75899cb9c7aa938c17ede2bb3f468e7a55d625b4