rockbox/utils/hwstub, branch wolf3d

MIPS: fix memset()

2018-09-07T07:43:05+00:00

swr/swl instructions used for word aligning were wrong. This
made memset() terribly broken. I can't imagine how it went
uncaught for soooo long. Spotted by Solomon Peachy.

I run unit tests for alignments 0,1,2,3
size 1, 2, 3, 4, 5, 63, 64, 65, 127, 128, 129;
and fill pattern 0x00 and other (since 0 is special case in this
implementation).

Change-Id: I513a10734335fe97734c10ab5a6c3e3fb3f4687a

hwstub: add code to dump STMP rom

2017-11-12T13:14:30+00:00

Change-Id: I083024662f3c085f7bcd2f85b0a68de85725b0f3

hwstub: expose read/write functions

2017-11-12T13:13:21+00:00

Previously only atomic read/write 8/16/32 were exposed. But it is useful to
be able to read a whole buffer at once, this is more efficient than N times
read8.

Change-Id: I06e331641e1ab1f74c0e16e8c432eafb398e8e6d

hwstub: fix horrible bug

2017-11-12T13:12:44+00:00

It's a wonder it worked, basically any big transfer returned garbage

Change-Id: Ic2b2fc1805423c70db8eac40692ba842c72462ab

ATJ hwstub: Add cache coherency

2017-09-15T19:44:59+00:00

All the hard work was done by pamaury. I simply added proper
defines.

Change-Id: Ib374eea7cd20f35518ad8a68d771c57c54ae01ca

qeditor: fix compile error and some comments

2017-08-28T20:52:29+00:00

Change-Id: I157c83fea8173adc53254f15aa49e41ee1ba7549

hwstub: be more quiet about register description loading failure

2017-01-24T14:34:20+00:00

Change-Id: I0edbb838022b71485179edec7361a6c554a1ab11

hwstub: fix memory leak in net backend

2017-01-24T14:34:20+00:00

Change-Id: I98bef5aa0c518e698c42761d02899adde8bc4aca

hwstub/jz4760b: add lua code to probe for ei/di and ext instructions

2017-01-24T14:34:20+00:00

Add lua code to check whether ei/di and ext instructions are supported. This
is unclear since xburst is somewhere between mips32r1 and mips32r2. Details
results are below, but in summary: they don't work (ei has no effect, di/ext
cause illegal instruction exceptions)

> ./hwstub_shell -q -b -e 'require("jz/misc"); JZ.misc.enable_sram()' \
  -f lua/xburst.lua -e "XBURST.test_ext_inst(0xb32d0000)"
[...]
Selecting soc jz4760b. Redirecting HW to hwstub.soc.jz4760b
  data: d7168acf
error: lua/xburst.lua:209: call failed
trapped exception in call

> ./hwstub_shell -q -b -e 'require("jz/misc"); JZ.misc.enable_sram()' \
  -f lua/xburst.lua -e "XBURST.test_ei_di_inst(0xb32d0000)"
[...]
Selecting soc jz4760b. Redirecting HW to hwstub.soc.jz4760b
Testing ei
  Test SR
    Enable interrupts with CP0
    SR: 0x1
    Disable interrupts with CP0
    SR: 0x0
  Test ei/di
    Enable interrupts with ei
    SR: 0x0
    Disable interrupts with di
error: lua/xburst.lua:244: call failed
trapped exception in call

Change-Id: I2e162b5dd5e70488bcd8b58f3ca401a3ecab3c4b

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