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bcm/bcm64
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richard miller)
the register does not seem to be accessible on the Rpi 3b.
so instead hardcode oscfreq in the Soc structure.
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this adds a 4GB KMAP window into the kernel address space
so we can access all physical ram on raspberry pi 4 for
user pages.
note that kernel memory above KZERO is still limited
to 1GB because of DMA restrictions.
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the hangs where caused by missing NX bits on the mmio mappings,
so the debug code is not needed anymore.
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according to the following linux change, BCM2711 uses a different
method for changing pullup/down mode:
https://github.com/raspberrypi/linux/commit/abcfd092860760087b87acbdda0963fe7906839c#diff-cf078559c38543ac72c5db99323e236d
gpiomeminit() was broken, using virtual address for the gpio physseg
instead of the physical one.
cleanup the code, avoid repetition by declaring static u32int *regs
variable. make local variable names consistent.
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the raspberry pi 4 uses 54 instead of 19.2 MHz crystal.
detect which frequency is used by reading OTP bootmode
register:
https://www.raspberrypi.org/documentation/hardware/raspberrypi/otpbits.md
Bit 1: sets the oscillator frequency to 19.2MHz
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cache-line-size aligned buffer
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the raspberry pi 4 has a new interrupt controller and
pci support, so get rid of intrenable() macro and
properly make intrenable function with tbdf argument.
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the raspberry pi4 firmware refuses to enable the GIC interrup controller
for arm64 when the .img file is not a multiple of 4 bytes. yes, this
is insane and nowhere documented.
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configurable in Soc.virtio and Soc.iosize
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the new raspberry pi 4 firmware for arm64 seems to have
broken atag support. so we now parse the device tree
structure to get the bootargs and memory configuration.
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for device drivers
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1.2 (2019))
Ori Bernstein had Sunrise Point-H USB 3.0 xHCI Controller that would mysteriously
crash on the 5th ENABLESLOT command. This was reproducable by even just allocating
slots in a loop right after init.
It turns out, the 1.2 spec extended the Max Scratchpad Buffers in HCSPARAMS2 so our
driver would not allocate enougth scratchpad buffers and controller firmware would
crash once it went beyond our allocated scratchpad buffer array.
This change also fixes:
- ignore bits 16:31 in PAGESIZE register
- preserve bits 10:31 in the CONFIG register
- handle ADDESSDEV command failure (so it can be retried)
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preallocate 2% of user pages for page tables and MMU structures
and keep them mapped in the VMAP range. this leaves more space
in the KZERO window and avoids running out of kernel memory on
machines with large amounts of memory.
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cases
handle empty filename, dot and dotdot. handle mismatching from/to directory/file
type. cleanup destination file on error. error when attempting to copy non-empty
directories.
little test program:
#include <unistd.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
if(argc != 3){
fprintf(stderr, "usage: %s old new\n", argv[0]);
return 1;
}
if(rename(argv[1], argv[2])){
perror("rename");
return 1;
}
return 0;
}
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when a operation receives a chain of OINDEX nodes as its operands,
each indexing step used to allocate a new index register. this
is wastefull an can result in running out of fixed registers on 386
for code such as: x = a[a[a[a[i]]]].
instead we attempt to reuse the destination register of the operation
as the index register if it is not otherwise referenced. this results
in the index chain to use a single register for index and result and
leaves registers free to be used for something usefull instead.
for 6c, try to avoid R13 as well as BP index base register.
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OINDEX can only return TLONG result on 386 so give it
a register instead of a regpair and let gmove() handle
the conversion.
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new implementation gets stuck in a infinite loop. backing
this out for now.
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For ape, we never enabled warnings in cflags.
Turning it on brings up a lot of warnings. Most are noise,
but a few caught unused variables and trunctaions of pointers.
to smaller integers (int, long).
A few warnings remain.
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To reproduce:
gs -q -dNOPAUSE -dSAFER '-sDEVICE=ppmraw' '-sOutputFile=/dev/null' <<.
%!PS-Adobe-3.0 EPSF-3.0
%%BoundingBox: -0 -0 100 100
/size_from 10000 def
/size_step 500 def
/size_to 65000 def
/enlarge 1000 def
%/bigarr 65000 array def
0
size_from size_step size_to {
pop
1 add
} for
/buffercount exch def
/buffersizes buffercount array def
0
size_from size_step size_to {
buffersizes exch 2 index exch put
1 add
} for
pop
/buffers buffercount array def
0 1 buffercount 1 sub {
/ind exch def
buffersizes ind get /cursize exch def
cursize string /curbuf exch def
buffers ind curbuf put
cursize 16 sub 1 cursize 1 sub {
curbuf exch 255 put
} for
} for
/buffersearchvars [0 0 0 0 0] def
/sdevice [0] def
enlarge array aload
{
.eqproc
buffersearchvars 0 buffersearchvars 0 get 1 add put
buffersearchvars 1 0 put
buffersearchvars 2 0 put
buffercount {
buffers buffersearchvars 1 get get
buffersizes buffersearchvars 1 get get
16 sub get
254 le {
buffersearchvars 2 1 put
buffersearchvars 3 buffers buffersearchvars 1 get get put
buffersearchvars 4 buffersizes buffersearchvars 1 get get 16 sub put
} if
buffersearchvars 1 buffersearchvars 1 get 1 add put
} repeat
buffersearchvars 2 get 1 ge {
exit
} if
%(.) print
} loop
.eqproc
.eqproc
.eqproc
sdevice 0
currentdevice
buffersearchvars 3 get buffersearchvars 4 get 16#7e put
buffersearchvars 3 get buffersearchvars 4 get 1 add 16#12 put
buffersearchvars 3 get buffersearchvars 4 get 5 add 16#ff put
put
buffersearchvars 0 get array aload
sdevice 0 get
16#3e8 0 put
sdevice 0 get
16#3b0 0 put
sdevice 0 get
16#3f0 0 put
currentdevice null false mark /OutputFile (%pipe%echo gotce)
.putdeviceparams
1 true .outputpage
.rsdparams
%{ } loop
0 0 .quit
%asdf
.
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