In aspeed_gpio_update() we calculate "mask = 1 << gpio", where
gpio can be between 0 and 31. Coverity complains about this
because 1 << 31 won't fit in a signed integer.
For QEMU this isn't an error because we enable -fwrapv,
but we can keep Coverity happy by doing the shift on
unsigned numbers.
Resolves: Coverity CID 1547742
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Use of assert(false) can trip spurious control flow warnings from
some versions of GCC (i.e. using -fsanitize=thread with gcc-12):
error: control reaches end of non-void function [-Werror=return-type]
default:
g_assert_not_reached();
break;
| ^^^^^
Solve that by removing the unreachable 'break' statement, unifying
the code base on g_assert_not_reached() instead.
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240910221606.1817478-28-pierrick.bouvier@linaro.org>
[PMD: Add description suggested by Eric Blake]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Use device_class_set_legacy_reset() instead of opencoding an
assignment to DeviceClass::reset. This change was produced
with:
spatch --macro-file scripts/cocci-macro-file.h \
--sp-file scripts/coccinelle/device-reset.cocci \
--keep-comments --smpl-spacing --in-place --dir hw
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240830145812.1967042-8-peter.maydell@linaro.org
ASan detected a global-buffer-overflow error in the aspeed_gpio_read()
function. This issue occurred when reading beyond the bounds of the
reg_table.
To enhance the safety and maintainability of the Aspeed GPIO code, this commit
introduces a reg_table_count member to the AspeedGPIOClass structure. This
change ensures that the size of the GPIO register table is explicitly tracked
and initialized, reducing the risk of errors if new register tables are
introduced in the future.
Reproducer:
cat << EOF | qemu-system-aarch64 -display none \
-machine accel=qtest, -m 512M -machine ast1030-evb -qtest stdio
readq 0x7e780272
EOF
ASAN log indicating the issue:
==2602930==ERROR: AddressSanitizer: global-buffer-overflow on address 0x55a5da29e128 at pc 0x55a5d700dc62 bp 0x7fff096c4e90 sp 0x7fff096c4e88
READ of size 2 at 0x55a5da29e128 thread T0
#0 0x55a5d700dc61 in aspeed_gpio_read hw/gpio/aspeed_gpio.c:564:14
#1 0x55a5d933f3ab in memory_region_read_accessor system/memory.c:445:11
#2 0x55a5d92fba40 in access_with_adjusted_size system/memory.c:573:18
#3 0x55a5d92f842c in memory_region_dispatch_read1 system/memory.c:1426:16
#4 0x55a5d92f7b68 in memory_region_dispatch_read system/memory.c:1459:9
#5 0x55a5d9376ad1 in flatview_read_continue_step system/physmem.c:2836:18
#6 0x55a5d9376399 in flatview_read_continue system/physmem.c:2877:19
#7 0x55a5d93775b8 in flatview_read system/physmem.c:2907:12
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2355
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Some of the source files for older devices use hardcoded tabs
instead of our current coding standard's required spaces.
Fix these in the following files:
- hw/arm/boot.c
- hw/char/omap_uart.c
- hw/gpio/zaurus.c
- hw/input/tsc2005.c
This commit is mostly whitespace-only changes; it also
adds curly-braces to some 'if' statements.
This addresses part of https://gitlab.com/qemu-project/qemu/-/issues/373
but some other files remain to be handled.
Signed-off-by: Tanmay Patil <tanmaynpatil105@gmail.com>
Message-id: 20240508081502.88375-1-tanmaynpatil105@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: tweaked commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We pass a ResetType argument to the Resettable class enter
phase method, but we don't pass it to hold and exit, even though
the callsites have it readily available. This means that if
a device cared about the ResetType it would need to record it
in the enter phase method to use later on. Pass the type to
all three of the phase methods to avoid having to do that.
Commit created with
for dir in hw target include; do \
spatch --macro-file scripts/cocci-macro-file.h \
--sp-file scripts/coccinelle/reset-type.cocci \
--keep-comments --smpl-spacing --in-place \
--include-headers --dir $dir; done
and no manual edits.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luc Michel <luc.michel@amd.com>
Message-id: 20240412160809.1260625-5-peter.maydell@linaro.org
* Mark devices with user_creatable = false that can crash QEMU otherwise
* Fix s390x TEST-AND-SET TCG instruction emulation
* Move pc955* devices to hw/gpio/
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Merge tag 'pull-request-2024-03-25' of https://gitlab.com/thuth/qemu into staging
* Fix timeouts in Travis-CI jobs
* Mark devices with user_creatable = false that can crash QEMU otherwise
* Fix s390x TEST-AND-SET TCG instruction emulation
* Move pc955* devices to hw/gpio/
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# gpg: Signature made Mon 25 Mar 2024 14:10:32 GMT
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* tag 'pull-request-2024-03-25' of https://gitlab.com/thuth/qemu:
tests/tcg/s390x: Test TEST AND SET
target/s390x: Use mutable temporary value for op_ts
libqos/virtio.c: Correct 'flags' reading in qvirtqueue_kick
misc/pca955*: Move models under hw/gpio
aspeed: Make the ast1030-a1 SoC not user creatable
aspeed: Make the ast2600-a3 SoC not user creatable
hw/microblaze: Do not allow xlnx-zynqmp-pmu-soc to be created by the user
.travis.yml: Remove the unused xfslib-dev package
.travis.yml: Shorten the runtime of the problematic jobs
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The PCA9552 and PCA9554 devices are both I2C GPIO controllers and the
PCA9552 also can drive LEDs. Do all the necessary adjustments to move
the models under hw/gpio.
Cc: Glenn Miles <milesg@linux.vnet.ibm.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Message-ID: <20240325134833.1484265-1-clg@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
NXP PCF8574 and compatible ICs are simple I2C GPIO expanders.
PCF8574 incorporates quasi-bidirectional IO, and simple
communication protocol, when IO read is I2C byte read, and
IO write is I2C byte write. User can think of it as
open-drain port, when line high state is input and line low
state is output.
Signed-off-by: Dmitrii Sharikhin <d.sharikhin@yadro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <f1552d822276e878d84c01eba2cf2c7c9ebdde00.camel@yadro.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Features supported :
- the 8 STM32L4x5 GPIOs are initialized with their reset values
(except IDR, see below)
- input mode : setting a pin in input mode "externally" (using input
irqs) results in an out irq (transmitted to SYSCFG)
- output mode : setting a bit in ODR sets the corresponding out irq
(if this line is configured in output mode)
- pull-up, pull-down
- push-pull, open-drain
Difference with the real GPIOs :
- Alternate Function and Analog mode aren't implemented :
pins in AF/Analog behave like pins in input mode
- floating pins stay at their last value
- register IDR reset values differ from the real one :
values are coherent with the other registers reset values
and the fact that AF/Analog modes aren't implemented
- setting I/O output speed isn't supported
- locking port bits isn't supported
- ADC function isn't supported
- GPIOH has 16 pins instead of 2 pins
- writing to registers LCKR, AFRL, AFRH and ASCR is ineffective
Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20240305210444.310665-2-ines.varhol@telecom-paris.fr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Implement nRF51 DETECT signal in the GPIO peripheral.
The reference manual makes mention of a per-pin DETECT signal, but these
are not exposed to the user. See https://devzone.nordicsemi.com/f/nordic-q-a/39858/gpio-per-pin-detect-signal-available
for more information. Currently, I don't see a reason to model these.
Signed-off-by: Chris Laplante <chris@laplante.io>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20230728160324.1159090-2-chris@laplante.io
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We use the user_ss[] array to hold the user emulation sources,
and the softmmu_ss[] array to hold the system emulation ones.
Hold the latter in the 'system_ss[]' array for parity with user
emulation.
Mechanical change doing:
$ sed -i -e s/softmmu_ss/system_ss/g $(git grep -l softmmu_ss)
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230613133347.82210-10-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Bring the files in line with the QEMU coding style, with spaces
for indentation.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/378
Signed-off-by: Yeqi Fu <fufuyqqqqqq@gmail.com>
Message-Id: <20230315032649.57568-1-fufuyqqqqqq@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Since &I2C_SLAVE(dev)->qdev == dev, no need to go back and
forth with QOM type casting. Directly use 'dev'.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230220115114.25237-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Following docs/devel/style.rst guidelines, rename omap2_gpif_s ->
Omap2GpioState. This also remove a use of 'struct' in the
DECLARE_INSTANCE_CHECKER() macro call.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230109140306.23161-6-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Following docs/devel/style.rst guidelines, rename omap_gpif_s ->
Omap1GpioState. This also remove a use of 'struct' in the
DECLARE_INSTANCE_CHECKER() macro call.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230109140306.23161-5-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230109140306.23161-4-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add a local 'struct omap_gpif_s *' variable to improve readability.
(This also eases next commit conversion).
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230109140306.23161-3-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Having a dedicated config switch makes dependency handling cleaner.
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20221003203142.24355-3-shentey@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Up until now, guests could modify input pins by overwriting the data
value register. The guest OS should only be allowed to modify output pin
values, and the QOM property setter should only be permitted to modify
input pins.
This change also updates the gpio input pin test to match this
expectation.
Andrew suggested this particularly refactoring here:
https://lore.kernel.org/qemu-devel/23523aa1-ba81-412b-92cc-8174faba3612@www.fastmail.com/
Suggested-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Peter Delevoryas <peter@pjd.dev>
Fixes: 4b7f956862 ("hw/gpio: Add basic Aspeed GPIO model for AST2400 and AST2500")
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220712023219.41065-3-peter@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
It did not support GPIO index mode for read operation.
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220525053444.27228-4-jamin_lin@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
AST1030 integrates one set of Parallel GPIO Controller
with maximum 151 control pins, which are 21 groups
(A~U, exclude pin: M6 M7 Q5 Q6 Q7 R0 R1 R4 R5 R6 R7 S0 S3 S4
S5 S6 S7 ) and the group T and U are input only.
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220525053444.27228-3-jamin_lin@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
I was setting gpioV4-7 to "1110" using the QOM pin property handler and
noticed that lowering gpioV7 was inadvertently lowering gpioV4-6 too.
(qemu) qom-set /machine/soc/gpio gpioV4 true
(qemu) qom-set /machine/soc/gpio gpioV5 true
(qemu) qom-set /machine/soc/gpio gpioV6 true
(qemu) qom-get /machine/soc/gpio gpioV4
true
(qemu) qom-set /machine/soc/gpio gpioV7 false
(qemu) qom-get /machine/soc/gpio gpioV4
false
An expression in aspeed_gpio_set_pin_level was using a logical NOT
operator instead of a bitwise NOT operator:
value &= !pin_mask;
The original author probably intended to make a bitwise NOT expression
"~", but mistakenly used a logical NOT operator "!" instead. Some
programming languages like Rust use "!" for both purposes.
Fixes: 4b7f956862 ("hw/gpio: Add basic Aspeed GPIO model for AST2400 and
AST2500")
Signed-off-by: Peter Delevoryas <pdel@fb.com>
Message-Id: <20220502080827.244815-1-pdel@fb.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Not sure how that got there.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Message-Id: <20220207150409.358888-2-andrew@aj.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Many files use "qemu/log.h" declarations but neglect to include
it (they inherit it via "exec/exec-all.h"). "exec/exec-all.h" is
a core component and shouldn't be used that way. Move the
"qemu/log.h" inclusion locally to each unit requiring it.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220207082756.82600-10-f4bug@amsat.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The migration code will not look at a VMStateDescription's
minimum_version_id_old field unless that VMSD has set the
load_state_old field to something non-NULL. (The purpose of
minimum_version_id_old is to specify what migration version is needed
for the code in the function pointed to by load_state_old to be able
to handle it on incoming migration.)
We have exactly one VMSD which still has a load_state_old,
in the PPC CPU; every other VMSD which sets minimum_version_id_old
is doing so unnecessarily. Delete all the unnecessary ones.
Commit created with:
sed -i '/\.minimum_version_id_old/d' $(git grep -l '\.minimum_version_id_old')
with the one legitimate use then hand-edited back in.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
It missed vmstate_ppc_cpu.
The gpio array is declared as a dense array:
qemu_irq gpios[ASPEED_GPIO_NR_PINS];
(AST2500 has 228, AST2400 has 216, AST2600 has 208)
However, this array is used like a matrix of GPIO sets
(e.g. gpio[NR_SETS][NR_PINS_PER_SET] = gpio[8][32])
size_t offset = set * GPIOS_PER_SET + gpio;
qemu_set_irq(s->gpios[offset], !!(new & mask));
This can result in an out-of-bounds access to "s->gpios" because the
gpio sets do _not_ have the same length. Some of the groups (e.g.
GPIOAB) only have 4 pins. 228 != 8 * 32 == 256.
To fix this, I converted the gpio array from dense to sparse, to that
match both the hardware layout and this existing indexing code.
Fixes: 4b7f956862 ("hw/gpio: Add basic Aspeed GPIO model for AST2400 and AST2500")
Signed-off-by: Peter Delevoryas <pdel@fb.com>
Message-Id: <20211008033501.934729-2-pdel@fb.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Some of the pin declarations in the Aspeed GPIO module were incorrect,
probably because of confusion over which bits in the input and output
uint32_t's correspond to which groups in the label array. Since the
uint32_t literals are in big endian, it's sort of the opposite of what
would be intuitive. The least significant bit in ast2500_set_props[6]
corresponds to GPIOY0, not GPIOAB7.
GPIOxx indicates input and output capabilities, GPIxx indicates only
input, GPOxx indicates only output.
AST2500:
- Previously had GPIW0..GPIW7 and GPIX0..GPIX7, that's correct.
- Previously had GPIOY0..GPIOY3, should have been GPIOY0..GPIOY7.
- Previously had GPIOAB0..GPIOAB3 and GPIAB4..GPIAB7, should only have
been GPIOAB0..GPIOAB3.
AST2600:
- GPIOT0..GPIOT7 should have been GPIT0..GPIT7.
- GPIOU0..GPIOU7 should have been GPIU0..GPIU7.
- GPIW0..GPIW7 should have been GPIOW0..GPIOW7.
- GPIOY0..GPIOY7 and GPIOZ0...GPIOZ7 were disabled.
Fixes: 4b7f956862 ("hw/gpio: Add basic Aspeed GPIO model for AST2400 and AST2500")
Fixes: 36d737ee82 ("hw/gpio: Add in AST2600 specific implementation")
Signed-off-by: Peter Delevoryas <pdel@fb.com>
Reviewed-by: Damien Hedde <damien.hedde@greensocs.com>
Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
Message-Id: <20210928032456.3192603-2-pdel@fb.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Rename qbus_create_inplace() to qbus_init(); this is more in line
with our usual naming convention for functions that in-place
initialize objects.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20210923121153.23754-5-peter.maydell@linaro.org
There are two GPIO controllers in the ast2600; one is 3.3V and the other
is 1.8V.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20210713065854.134634-4-joel@jms.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
There's no need to define the registers relative to the 0x800 offset
where the controller is mapped, as the device is instantiated as it's
own model at the correct memory address.
Simplify the defines and remove the offset to save future confusion.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210713065854.134634-3-joel@jms.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The macro used to calculate the maximum memory size of the MMIO region
had a mistake, causing all GPIO models to create a mapping of 0x9D8.
The intent was to have it be 0x9D8 - 0x800.
This extra size doesn't matter on ast2400 and ast2500, which have a 4KB
region set aside for the GPIO controller.
On the ast2600 the 3.3V and 1.8V GPIO controllers are 2KB apart, so the
regions would overlap. Worse was the 1.8V controller would map over the
top of the following peripheral, which happens to be the RTC.
The mmio region used by each device is a maximum of 2KB, so avoid the
calculations and hard code this as the maximum.
Fixes: 36d737ee82 ("hw/gpio: Add in AST2600 specific implementation")
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Rashmica Gupta <rashmica.g@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20210713065854.134634-2-joel@jms.id.au
[PMM: fix autocorrect error in commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The Luminary PL061s in the Stellaris LM3S9695 don't all have the same
reset value for GPIOPUR. We can get away with not letting the board
configure the PUR reset value because we don't actually wire anything
up to the lines which should reset to pull-up. Add a comment noting
this omission.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
The PL061 comes out of reset with all its lines configured as input,
which means they might need to be pulled to 0 or 1 depending on the
'pullups' and 'pulldowns' properties. Currently we do not assert
these lines on reset; they will only be set whenever the guest first
touches a register that triggers a call to pl061_update().
Convert the device to three-phase reset so we have a place where we
can safely call qemu_set_irq() to set the floating lines to their
correct values.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
The PL061 GPIO does not itself include pullup or pulldown resistors
to set the value of a GPIO line treated as an output when it is
configured as an input (ie when the PL061 itself is not driving it).
In real hardware it is up to the board to add suitable pullups or
pulldowns. Currently our implementation hardwires this to "outputs
pulled high", which is correct for some boards (eg the realview ones:
see figure 3-29 in the "RealView Platform Baseboard for ARM926EJ-S
User Guide" DUI0224I), but wrong for others.
In particular, the wiring in the 'virt' board and the gpio-pwr device
assumes that wires should be pulled low, because otherwise the
pull-to-high will trigger a shutdown or reset action. (The only
reason this doesn't happen immediately on startup is due to another
bug in the PL061, where we don't assert the GPIOs to the correct
value on reset, but will do so as soon as the guest touches a
register and pl061_update() gets called.)
Add properties to the pl061 so the board can configure whether it
wants GPIO lines to have pullup, pulldown, or neither.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
The Luminary variant of the PL061 has registers GPIOPUR and GPIOPDR
which lets the guest configure whether the GPIO lines are pull-up,
pull-down, or truly floating. Instead of assuming all lines are pulled
high, honour the PUR and PDR registers.
For the plain PL061, continue to assume that lines have an external
pull-up resistor, as we did before.
The stellaris board actually relies on this behaviour -- the CD line
of the ssd0323 display device is connected to GPIO output C7, and it
is only because of a different bug which we're about to fix that we
weren't incorrectly driving this line high on reset and putting the
ssd0323 into data mode.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Add a comment documenting the "QEMU interface" of this device:
which MMIO regions, IRQ lines, GPIO lines, etc it exposes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Add tracepoints for reads and writes to the PL061 registers. This requires
restructuring pl061_read() to only return after the tracepoint, rather
than having lots of early-returns.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Currently the pl061_read() and pl061_write() functions handle offsets
using a combination of three if() statements and a switch(). Clean
this up to use just a switch, using case ranges.
This requires that instead of catching accesses to the luminary-only
registers on a stock PL061 via a check on s->rsvd_start we use
an "is this luminary?" check in the cases for each luminary-only
register.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Convert the use of the DPRINTF debug macro in the PL061 model to
use tracepoints.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
qemu has 2 type of functions: shutdown and reboot. Shutdown
function has to be used for machine shutdown. Otherwise we cause
a reset with a bogus "cause" value, when we intended a shutdown.
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20210625111842.3790-3-maxim.uvarov@linaro.org
[PMM: tweaked commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Headers should be included from the 'include/' directory,
not from the root directory.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20210516205034.694788-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Commit e50caf4a5c ("tracing: convert documentation to rST")
converted docs/devel/tracing.txt to docs/devel/tracing.rst.
We still have several references to the old file, so let's fix them
with the following command:
sed -i s/tracing.txt/tracing.rst/ $(git grep -l docs/devel/tracing.txt)
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210517151702.109066-2-sgarzare@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
