| 012e9745 | 01-Aug-2021 |
Guenter Roeck <[email protected]> |
xtensa: xtfpga: Try software restart before simulating CPU reset
Rebooting xtensa images loaded with the '-kernel' option in qemu does
not work. When executing a reboot command, the qemu session eit
xtensa: xtfpga: Try software restart before simulating CPU reset
Rebooting xtensa images loaded with the '-kernel' option in qemu does
not work. When executing a reboot command, the qemu session either hangs
or experiences an endless sequence of error messages.
Kernel panic - not syncing: Unrecoverable error in exception handler
Reset code jumps to the CPU restart address, but Linux can not recover
from there because code and data in the kernel init sections have been
discarded and overwritten at this point.
XTFPGA platforms have a means to reset the CPU by writing 0xdead into a
specific FPGA IO address. When used in QEMU the kernel image loaded with
the '-kernel' option gets restored to its original state allowing the
machine to boot successfully.
Use that mechanism to attempt a platform reset. If it does not work,
fall back to the existing mechanism.
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Max Filippov <[email protected]>
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| 64716b9e | 15-Dec-2019 |
Max Filippov <[email protected]> |
xtensa: drop empty platform_* functions from platforms
Provide missing default implementation for platform_init and drop copies
of default platform_init, platform_setup and platform_heartbeet from
p
xtensa: drop empty platform_* functions from platforms
Provide missing default implementation for platform_init and drop copies
of default platform_init, platform_setup and platform_heartbeet from
platforms/*/setup.c
Signed-off-by: Max Filippov <[email protected]>
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| aea731c8 | 13-Aug-2018 |
Max Filippov <[email protected]> |
xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_START
Drop PLATFORM_DEFAULT_MEM_START from the platform/hardware.h headers.
Provide definition of CONFIG_DEFAULT_MEM_START always, allow changing it
only
xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_START
Drop PLATFORM_DEFAULT_MEM_START from the platform/hardware.h headers.
Provide definition of CONFIG_DEFAULT_MEM_START always, allow changing it
only in noMMU configurations when PLATFORM_WANT_DEFAULT_MEM is selected.
Change prompt and description so that it's clear that it controls
PAGE_OFFSET and PHYS_OFFSET.
Signed-off-by: Max Filippov <[email protected]>
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| 70feca71 | 20-Sep-2016 |
Max Filippov <[email protected]> |
xtensa: xtfpga: group platform_* functions together
Group platform_* functions together and turn two separate #ifdef/#ifndef
blocks into single #ifdef/#else. No functional changes.
Signed-off-by: M
xtensa: xtfpga: group platform_* functions together
Group platform_* functions together and turn two separate #ifdef/#ifndef
blocks into single #ifdef/#else. No functional changes.
Signed-off-by: Max Filippov <[email protected]>
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| 205ad548 | 20-Sep-2016 |
Max Filippov <[email protected]> |
xtensa: rearrange CCOUNT calibration
DT-enabled kernel should have a CPU node connected to a clock. This clock
is the CCOUNT clock. Use old platform_calibrate_ccount call as a fallback
when CPU node
xtensa: rearrange CCOUNT calibration
DT-enabled kernel should have a CPU node connected to a clock. This clock
is the CCOUNT clock. Use old platform_calibrate_ccount call as a fallback
when CPU node cannot be found or has no clock and in non-DT-enabled
configurations.
Drop no longer needed code that updates CPU clock-frequency property in
the DT; drop DT-related code from the platform_calibrate_ccount too.
Move of_clk_init to the top of time_init, so that clocks are initialized
before CCOUNT calibration is attempted.
Signed-off-by: Max Filippov <[email protected]>
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| 58c3e3ac | 25-Jul-2016 |
Max Filippov <[email protected]> |
xtensa: xtfpga: use clock provider, don't update DT
Instead of querying hardcoded FPGA frequency register and then updating
clock-frequency property in specificly named DT nodes in machine setup
cod
xtensa: xtfpga: use clock provider, don't update DT
Instead of querying hardcoded FPGA frequency register and then updating
clock-frequency property in specificly named DT nodes in machine setup
code register a clock provider that returns fixed-rate clock, configured
by register specified in DT. This way we have less magic/hardcoded names
and use more existing common clock framework code.
Signed-off-by: Max Filippov <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
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| d99434e1 | 25-Aug-2015 |
Max Filippov <[email protected]> |
xtensa: xtfpga: fix ethernet controller endianness
Ethernet controller is attached to XTFPGA boards as native endian device,
mark it as such in DTS and pass correct endianness in platform data.
This
xtensa: xtfpga: fix ethernet controller endianness
Ethernet controller is attached to XTFPGA boards as native endian device,
mark it as such in DTS and pass correct endianness in platform data.
This makes network functional on big-endian CPUs.
Signed-off-by: Max Filippov <[email protected]>
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