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Author SHA1 Message Date
Hector Martin
96d133e854 mmu: map device memory as non-executable 
This fixes the random SErrors after returning from a page fault. Turns
out the M1 was randomly deciding to speculate an instruction fetch from
address 0, triggering a fabric error.

Quoting the ARM ARM:

"Hardware does not prevent speculative instruction fetches from a memory
location with any of the Device memory attributes unless the memory
location is also marked as Execute-never for all Exception levels.

This means that to prevent speculative instruction fetches from memory
locations with Device memory attributes, any location that is assigned
any Device memory type must also be marked as execute-never for all
Exception levels. Failure to mark a memory location with any Device
memory attribute as execute-never for all Exception levels is a
programming error."

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-31 13:42:48 +09:00
Hector Martin
b65e2ca0e4 mmu: also set up high-VA translation 
Just an alias

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
f247643fe6 chainload.py: shut down mmu and flush caches when chainloading 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
2d5fb878f8 Makefile: build for armv8.2-a 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
b2ef461114 get rid of another warning pragma 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
919e3fb64a exception: use 64bit print types 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
65c0632ae7 exception: do not reboot on SError 
This may or may not go well depending on the problem... but let's see
what happens.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
201d7d9a1e exception: also print FAR_EL2 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
040cb9d6fd exception: enable SError 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
bbe47b2f75 Move Apple ARM register definitions to cpu_regs.h 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
7807dad7bc exception: add barriers around stuff 
This CPU really likes to speculate...

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
1f99c17fef exception: clear L2C error status after exception 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
5dd63e41a1 exception: decode exception type on dumps 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
6dde40b05c exception: introduce recovery from synchronous exceptions 
Use this to recover from address faults in the proxy. Also print out L2
subsystem fault info.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
d31eab5f87 chickens: do not disable L2 subsystem errors 
These mean real problems, let's actually fix them instead of shoving
them under the carpet.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
4167a18a64 utils: move sys_reg and is_ecore() to utils.h 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 22:00:00 +09:00
Hector Martin
2df212bf5c adt: use ADT_FOREACH macros internally 
This fixes some bugs too.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 03:15:00 +09:00
Hector Martin
dc2b7b3bb4 startup: clear bss section 
iBoot does this for us, but this is for the benefit of chainload.py and
other dump loaders that may not.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 03:03:03 +09:00
Hector Martin
b673db78c3 minilzlib/xzstream.h: get rid of warning pragma 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 03:03:03 +09:00
Hector Martin
74307af0df kboot: add proper kernel boot & DT manipulation code 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
33d6c311ad malloc.py: fix memalign 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
352c6945d1 chickens.py: fix some brokenness 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
ad93d14ee5 chickens: clear SYS_L2C_ERR_STS 
It's unclear why this is necessary, but it fixes some strange crashes

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
c057775ab9 adt: add ADT_FOREACH_PROPERTY 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
891bc5592e utils.h: fix msr/mrs macro expansion 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
46a46da111 string: add memmove, strrchr, strncmp 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
b82c0072e7 utils.h: mark reboot() noreturn 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
d280157289 libfdt: actually add libfdt 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-30 01:37:09 +09:00
Hector Martin
986c6730e9 Add heapblock and dlmalloc for managing memory 
heapblock is a simple `sbrk` style implementation, also useful as an
"endless" decompression buffer. dlmalloc is used on top as a malloc
implementation.

This also changes how the Python side manages its heap. We still use a
python-side malloc implementation (since this is faster), and we put the
Python heap at the m1n1 heap + 128MB, without allocating it.
Hopefully this should never step on anything m1n1 neads, and avoids
having to manage freeing across Python script calls.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-29 16:25:15 +09:00
Hector Martin
f3d0a58f42 proxy: add mmu_shutdown call, use it for linux.py 
I saw at least one SError crash on Linux after doing this, but can't
repro; unclear if related to the MMU changes or not...

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-29 00:36:46 +09:00
Hector Martin
c3c6e4e8f9 smp: add scaffolding and proxy funcs for cross-CPU calls 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-29 00:36:46 +09:00
Hector Martin
e97b104125 main: do not spin up SMP 
This breaks reloads, we shouldn't do this until we need to.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
eae3d06e85 smp: fix totally broken stack setup 
This worked by accident before...

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
11753f9983 start.S: probe the stack after init 
This makes it obvious when the stack is broken.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
cffc423024 smp: use ADT data instead of hardcoded info 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
b4822eb02c adt: improve APIs for iterating through child nodes 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
db902ce01f wdt: move WDT disable code to wdt.c & use ADT regs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
3733ea153f smp: fix broken spin-table routine 
Only read target_cpu once, then keep a pointer our spin table.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Hector Martin
ba1162e322 adt: add an API for resolving reg properties 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 23:48:35 +09:00
Sven Peter
9242c820ae MMU: clean and invalidate all caches after shutdown 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-01-28 23:20:15 +09:00
Sven Peter
2f84b33ba8 MMU: add cache operations by set/way 
this embeds a slightly modified file taken from
arm-trusted-firmware.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-01-28 23:20:15 +09:00
Sven Peter
f244919c98 MMU: add initial support 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-01-28 23:20:15 +09:00
Sven Peter
63fad7e3e2 utils.h: add panic() macro 
Signed-off-by: Sven Peter <sven@svenpeter.dev>
 2021-01-28 23:20:15 +09:00
Hector Martin
d762391a68 Add code to spin up secondary CPUs 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00
Hector Martin
65276fdd3f utils.h: add memory clobbers 
We mostly use read32/write32 and friends to poke hardware registers,
which might have side effects on RAM, so just make everything a memory
clobber to avoid potential issues.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00
Hector Martin
08763968ac malloc.py: add memalign 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00
Hector Martin
0145830772 chickens: add firestorm chicken bits 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00
Hector Martin
35e24d58d9 linkerscript: add a dummy payload section starting at EOF 
So it turns out iBoot is happy to load mach-o files with a section hanging
"off the end" of the file (it does not over-read, it just ignores the
excess). We can use this to our advantage to support appending payloads
to m1n1 with a simple `cat`.

Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00
Hector Martin
344c84da17 clang-format everything 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00
Hector Martin
5ce22e5c3a .clang-format: AlignConsecutiveMacros: true, 100 columns 
Signed-off-by: Hector Martin <marcan@marcan.st>
 2021-01-28 16:06:12 +09:00