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If the HW compression is left on, the call backs from the HW will
crash the kernel. The only time this code is called is when kernel
mode setting is in use with kgdb and the kdb shell.
The atomic display pipe handler callback will reset everything when
kgdb restores kernel to the run state.
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: Jesse Barnes <[email protected]>
CC: David Airlie <[email protected]>
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Implement atomic kernel mode settings using the fb layer's debug hook
system for supporting debugger interaction.
Signed-off-by: Jesse Barnes <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
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Implement the callbacks for KDB entry/exit via the drm helpers.
Signed-off-by: Jesse Barnes <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
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Add fb ops to handle enter/exit of the kernel debugger. If present, the
fb core will register them with KGDB and they'll be called when the
debugger is entered and exited. The new functions are responsible for
switching to an appropriate debug framebuffer and restoring the
interrupted state at exit time.
Signed-off-by: Jesse Barnes <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
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Add the kms keyword processing to kgdboc and the callbacks to invoke
console switching when ever kgdboc is started with "kgdboc=kms,kbd".
Signed-off-by: Jason Wessel <[email protected]>
Signed-off-by: Jesse Barnes <[email protected]>
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The kernel console interface stores the number of lines it is
configured to use. The kdb debugger can greatly benefit by knowing how
many lines there are on the console for the pager functionality
without having the end user compile in the setting or have to
repeatedly change it at run time.
Signed-off-by: Jason Wessel <[email protected]>
Signed-off-by: Jesse Barnes <[email protected]>
CC: David Airlie <[email protected]>
CC: Andrew Morton <[email protected]>
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These functions allow the kernel debugger to save and restore the
state of the system console.
Signed-off-by: Jesse Barnes <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
CC: David Airlie <[email protected]>
CC: Andrew Morton <[email protected]>
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When an arch such as mips and microblaze does not implement either HW
or software single stepping the debug core should re-enter kdb. The
kdb code will properly ignore the single step operation. Attempting
to single step the kernel without software or hardware support causes
unpredictable kernel crashes.
Signed-off-by: Jason Wessel <[email protected]>
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Use the macros provided by the HW breakpoint API.
Signed-off-by: Dongdong Deng <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
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The mips kgdb specific code does not support software or HW single
stepping so it should not implement
Signed-off-by: Jason Wessel <[email protected]>
Signed-off-by: Dongdong Deng <[email protected]>
Acked-by: Ralf Baechle <[email protected]>
CC: [email protected]
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The kdb kmap should never get used outside of the kernel debugger
exception context.
Signed-off-by: Jason Wessel<[email protected]>
CC: Andrew Morton <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: [email protected]
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Found by gcc 4.6's new warnings
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
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In systems with more than one processor it is desirable to look at the
per cpu trace buffers.
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
CC: Frederic Weisbecker <[email protected]>
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Add in a helper function to allow the kdb shell to dump the ftrace
buffer.
Modify trace.c to expose the capability to iterate over the ftrace
buffer in a read only capacity.
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
CC: Frederic Weisbecker <[email protected]>
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kgdb_handle_breakpoint checks the first arch_kgdb_breakpoint
which is not known by gdb that's why is necessary jump over
it. The jump lenght is equal to BREAK_INSTR_SIZE that's
why is cleaner to use defined macro instead of hardcoded
non-described offset.
Signed-off-by: Michal Simek <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
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Now that ARM implements the notify die handlers, add the ability for
the kernel debugger to receive the notifications.
Signed-off-by: Jason Wessel <[email protected]>
CC: Russell King <[email protected]>
CC: [email protected]
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Presently the usable registers definitions on x86 are not contiguous
for kgdb. The x86 kgdb uses a case statement for the sparse register
accesses. The array which defines the registers (dbg_reg_def) should
not be used directly in order to safely work with sparse register
definitions.
Specifically there was a problem when gdb accesses ORIG_AX, which is
accessed only through the case statement.
This patch encodes register memory using the size information provided
from the debugger which avoids the need to look up the size of the
register. The dbg_set_reg() function always further validates the
inputs from the debugger.
Signed-off-by: Jason Wessel <[email protected]>
Signed-off-by: Dongdong Deng <[email protected]>
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The gdbserial 'p' and 'P' packets allow gdb to individually get and
set registers instead of querying for all the available registers.
Signed-off-by: Jason Wessel <[email protected]>
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Implement the ability to individually get and set registers for kdb
and kgdb for arm.
Signed-off-by: Jason Wessel <[email protected]>
CC: Russell King <[email protected]>
CC: [email protected]
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Implement the ability to individually get and set registers for kdb
and kgdb for mips.
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: Ralf Baechle <[email protected]>
CC: [email protected]
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Implement the ability to individually get and set registers for kdb
and kgdb for x86.
Signed-off-by: Jason Wessel <[email protected]>
Acked-by: H. Peter Anvin <[email protected]>
CC: Ingo Molnar <[email protected]>
CC: [email protected]
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The kdb shell specification includes the ability to get and set
architecture specific registers by name.
For the time being individual register get and set will be implemented
on a per architecture basis. If an architecture defines
DBG_MAX_REG_NUM > 0 then kdb and the gdbstub will use the capability
for individually getting and setting architecture specific registers.
Signed-off-by: Jason Wessel <[email protected]>
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The gdb debugger understands how to parse short versions of the thread
reference string as long as the bytes are paired in sets of two
characters. The kgdb implementation was always sending 8 leading
zeros which could be omitted, and further optimized in the case of
non-negative thread numbers. The negative numbers are used to
reference a specific cpu in the case of kgdb.
An example of the previous i386 stop packet looks like:
T05thread:00000000000003bb;
New stop packet response:
T05thread:03bb;
The previous ThreadInfo response looks like:
m00000000fffffffe,0000000000000001,0000000000000002,0000000000000003,0000000000000004,0000000000000005,0000000000000006,0000000000000007,000000000000000c,0000000000000088,000000000000008a,000000000000008b,000000000000008c,000000000000008d,000000000000008e,00000000000000d4,00000000000000d5,00000000000000dd
New ThreadInfo response:
mfffffffe,01,02,03,04,05,06,07,0c,88,8a,8b,8c,8d,8e,d4,d5,dd
A few bytes saved means better response time when using kgdb over a
serial line.
Signed-off-by: Jason Wessel <[email protected]>
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Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
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Separate USB code into a file separate from asic/asic_devices.
Separating the USB code from everything else in asic/asic_devices.c goes
a long way toward reducing the use of that file as a dumping ground for
everything that didn't seem to fit anywhere else.
Signed-off-by: David VomLehn <[email protected]>
To: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: http://patchwork.linux-mips.org/patch/1522/
Signed-off-by: Ralf Baechle <[email protected]>
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This patch use "strip -s" to strip the .symtab and .strtab sections of
vmlinuz.
Note: This patch is based on http://patchwork.linux-mips.org/patch/1324/
Signed-off-by: Wu Zhangjin <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1383/
Signed-off-by: Ralf Baechle <[email protected]>
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We have calculated VMLINUZ_LOAD_ADDRESS in shell, which is indecipherable. This
patch rewrites it in C.
Signed-off-by: Wu Zhangjin <[email protected]>
To: linux-mips <[email protected]>
Cc: Alexander Clouter <[email protected]>
Cc: Manuel Lauss <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Acked-by: Sam Ravnborg <[email protected]>
Reviewed-by: Alexander Clouter <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/1324/
Signed-off-by: Ralf Baechle <[email protected]>
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- Remove several outdated comments
- Clearify the definition of zimage_start and zimage_size and the their
usage
Signed-off-by: Wu Zhangjin <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1382/
Signed-off-by: Ralf Baechle <[email protected]>
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- Remove unused symbols: _fdata, _text; only _edata and _end are needed by
head.S
- Remove unused sections: .sbss, .stab, .gptab.sdata, .gptab.sbss
- Change the alignment to 16 bytes to ensure it is greater than any
fundamental type of a MIPS compiler.
- Clean up comments
Signed-off-by: Wu Zhangjin <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1381/
Signed-off-by: Ralf Baechle <[email protected]>
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The compressed vmlinux.bin is only a temp file so it's ok to use the same
suffix .z for them (.gz,.lzo,.lzma...) to remove several lines and simpify
the maintenance (no need to add the "suffix_$(xxx) := suffix" line).
Signed-off-by: Wu Zhangjin <[email protected]>
To: linux-mips <[email protected]>
Cc: Alexander Clouter <[email protected]>
Cc: Manuel Lauss <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/1323/
Signed-off-by: Ralf Baechle <[email protected]>
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Define ASIC address, memory preallocations, and initialization code for the
Gaia platform.
Signed-off-by: David VomLehn <[email protected]>
To: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1519/
Signed-off-by: Ralf Baechle <[email protected]>
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Nvram_getenv should behave like cfe_getenv. cfe_getenv returns 0 on
success and -9 if the value was not found. If the input was wrong -8
will be returned by cfe_getenv. Change nvram_getenv to do the same.
Signed-off-by: Hauke Mehrtens <[email protected]>
Cc: Waldemar Brodkorb <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1520/
Signed-off-by: Ralf Baechle <[email protected]>
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We reserve the 3.75GB - 4GB region of PCIe address space for device to
device transfers, making the corresponding physical memory under
direct mapping unavailable for DMA.
To allow for PCIe DMA to all physical memory we map this chunk of
physical memory with BAR1. Because of the resulting discontinuity in
the mapping function, we remove a page of memory at each end of the
range so multi-page DMA buffers can never be allocated that span the
range.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1535/
Signed-off-by: Ralf Baechle <[email protected]>
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The sixth argument of notify_die() is a signal number, the fifth is a
trap number.
Instead of passing a signal number in a randomly selected argument,
pass it in the sixth. Extract the exception code from regs and pass
that as the trap number.
Get rid of redundant cast, and remove some gratuitous spaces.
Nobody actually does anything with the signal number or trap number,
but we might as well populate them with sensible values.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1532/
Signed-off-by: Ralf Baechle <[email protected]>
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It is initialized to zero and only ever read. Remove it, and pass zero in
its place.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1531/
Signed-off-by: Ralf Baechle <[email protected]>
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MIPS now has KProbes support, so kprobes.txt should reflect it.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1527/
Signed-off-by: Ralf Baechle <[email protected]>
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This KProbes example is a little useless if it doesn't print anything.
For MIPS print similar messages to those produced on x86 and PPC.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1528/
Signed-off-by: Ralf Baechle <[email protected]>
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This patch is based on previous work by Sony and Himanshu Chauhan.
I have done some cleanup and implemented JProbes and KRETPROBES. The
KRETPROBES part is pretty much copied verbatim from powerpc. A possible
future enhance might be to factor out the common code.
Signed-off-by: David Daney <[email protected]>
Cc: Himanshu Chauhan <[email protected]>
To: [email protected]
To: [email protected],
To: [email protected]
To: [email protected]
To: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1525/
Patchwork: https://patchwork.linux-mips.org/patch/1530/
Signed-off-by: Ralf Baechle <[email protected]>
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Signed-off-by: David Daney <[email protected]>
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1524/
Signed-off-by: Ralf Baechle <[email protected]>
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Signed-off-by: David Daney <[email protected]>
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
To: [email protected]
Cc: [email protected],
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1529/
Signed-off-by: Ralf Baechle <[email protected]>
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This belongs into userland.
Signed-off-by: Ralf Baechle <[email protected]>
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MSI-X interrupts are not supported yet for Octeon, return error if
MSI-X interrupts are requested by driver so that the driver will fall
back to use MSI interrupts.
Signed-off-by: Chandrakala Chavva <[email protected]>
To: [email protected]
Cc: David Daney <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/1506/
Signed-off-by: Ralf Baechle <[email protected]>
Signed-off-by: David Daney <[email protected]>
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Signed-off-by: David Daney <[email protected]>
To: [email protected]
Patchwork: http://patchwork.linux-mips.org/patch/1507/
Signed-off-by: Ralf Baechle <[email protected]>
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The struct cpuinfo_mips.core field should be populated with the
physical core number. For R2 CPUs, this is carried in the low 10 bits
of Ebase.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1505/
Signed-off-by: Ralf Baechle <[email protected]>
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While at it, drop 0x prefix.
Signed-off-by: Kulikov Vasiliy <[email protected]>
To: [email protected]
Cc: Chris Dearman <[email protected]>
Cc: "Robert P. J. Day" <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: André Goddard Rosa <[email protected]>
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1458/
Signed-off-by: Ralf Baechle <[email protected]>
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LOONGSON2_PERFCNT_IRQ is used for the irq number of the performance
overflow interrupts; LOONGSON_PERFCNT_IRQ is unused so remove it.
Signed-off-by: Wu Zhangjin <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1494/
Signed-off-by: Ralf Baechle <[email protected]>
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On FuLoong-2F IP6 is shared by the performance counter overflow interrupt
and the Bonito northbridge interrupt. To reduce overhead only call
do_IRQ() when oprofile is enabled to reduce overhead.
This patch adds an inline function do_perfcnt_IRQ() to hide the #if's ,
which can be shared by the other Loongson machines, i.e. gdium.
Signed-off-by: Wu Zhangjin <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1492/
Signed-off-by: Ralf Baechle <[email protected]>
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set_irq_trigger_mode() is not needed on all platforms so remove it
and move the related source code to mach_init_irq().
This will allow gdium to share the common irq.c without adding an empty
set_irq_trigger_mode().
Signed-off-by: Wu Zhangjin <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1493/
Signed-off-by: Ralf Baechle <[email protected]>
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The OCTEON is a MIPS64 based SOC family with an on chip watchdog unit.
The driver is split into two source files one for the C code and one
for assembly. Assembly is needed to handle the NMI and then print the
machine state before the reboot is triggered.
Signed-off-by: David Daney <[email protected]>
Cc: Wim Van Sebroeck <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Russell King <[email protected]>
Cc: Tony Lindgren <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Sam Ravnborg <[email protected]>
To: [email protected]
Cc: [email protected],
Patchwork: https://patchwork.linux-mips.org/patch/1503/
Signed-off-by: Wim Van Sebroeck <[email protected]>
Signed-off-by: Ralf Baechle <[email protected]>
create mode 100644 drivers/watchdog/octeon-wdt-main.c
create mode 100644 drivers/watchdog/octeon-wdt-nmi.S
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This is used by the forthcoming OCTEON watchdog patch.
Signed-off-by: David Daney <[email protected]>
To: [email protected]
To: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/1498/
Signed-off-by: Ralf Baechle <[email protected]>
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