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When the system-suspend-test property is present in the domain config
node as shown below, implement system suspend with a simple 5 second
delay followed by a WFI. This allows testing system suspend when the
low-level firmware doesn't support it.
/ {
chosen {
opensbi-domains {
compatible = "opensbi,domain,config";
system-suspend-test;
};
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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On the Renesas RZ/Five SoC by default we want to configure 128MiB of memory
ranging from 0x58000000 as a non-cacheable + bufferable region in the PMA
and populate this region as PMA reserve DT node with shared DMA pool and
no-map flags set so that Linux drivers requesting any DMA'able memory go
through this region.
PMA node passed to the above stack:
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
pma_resv0@58000000 {
compatible = "shared-dma-pool";
reg = <0x0 0x58000000 0x0 0x08000000>;
no-map;
linux,dma-default;
};
};
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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I/O Coherence Port (IOCP) provides an AXI interface for connecting
external non-caching masters, such as DMA controllers. The accesses
from IOCP are coherent with D-Caches and L2 Cache.
IOCP is a specification option and is disabled on the Renesas RZ/Five
SoC due to this reason IP blocks using DMA will fail.
The Andes AX45MP core has a Programmable Physical Memory Attributes (PMA)
block that allows dynamic adjustment of memory attributes in the runtime.
It contains a configurable amount of PMA entries implemented as CSR
registers to control the attributes of memory locations in interest.
Below are the memory attributes supported:
* Device, Non-bufferable
* Device, bufferable
* Memory, Non-cacheable, Non-bufferable
* Memory, Non-cacheable, Bufferable
* Memory, Write-back, No-allocate
* Memory, Write-back, Read-allocate
* Memory, Write-back, Write-allocate
* Memory, Write-back, Read and Write-allocate
More info about PMA (section 10.3):
Link: http://www.andestech.com/wp-content/uploads/AX45MP-1C-Rev.-5.0.0-Datasheet.pdf
As a workaround for SoCs with IOCP disabled CMO needs to be handled by
software. Firstly OpenSBI configures the memory region as
"Memory, Non-cacheable, Bufferable" and passes this region as a global
shared dma pool as a DT node. With DMA_GLOBAL_POOL enabled all DMA
allocations happen from this region and synchronization callbacks are
implemented to synchronize when doing DMA transactions.
Example PMA region passed as a DT node from OpenSBI:
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;
pma_resv0@58000000 {
compatible = "shared-dma-pool";
reg = <0x0 0x58000000 0x0 0x08000000>;
no-map;
linux,dma-default;
};
};
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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The extid parameter of vendor_ext_provider() is redundant so let us
remove it.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
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As-per the SBI specification, the lower 24bits of the SBI vendor
extension id is same as lower 24bits of the mvendorid CSR.
We update the SBI vendor extension id checking based on above.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
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The code calls various macros from riscv_asm.h which is not directly
included. Fix such dependency.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
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The code calls various macros from riscv_asm.h and sbi_scratch.h
which are not directly included. Fix such dependency.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Add D1's nonretentive suspend state to the devicetree so S-mode software
knows about it and can use it.
Latency and power measurements were taken on an Allwinner Nezha board:
- Entry latency was measured from the beginning of sbi_ecall_handler()
to before the call to wfi() in sun20i_d1_hart_suspend().
- Exit latency was measured from the beginning of sbi_init() to before
the call to sbi_hart_switch_mode() in init_warmboot().
- There was a 17.5 mW benefit from non-retentive suspend compared to
WFI, with a 170 mW cost during the 107 us entry/exit period. This
provides a break-even point around 1040 us. Residency includes entry
latency, so round this up to 1100 us.
- The hardware power sequence latency (after the WFI) is assumed to be
negligible, so set the wakeup latency to the exit latency.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Renesas RZ/Five RISC-V SoC has Instruction local memory and Data local
memory (ILM & DLM) mapped between region 0x30000 - 0x4FFFF. When a
virtual address falls within this range, the MMU doesn't trigger a page
fault; it assumes the virtual address is a physical address which can
cause undesired behaviours for statically linked applications/libraries.
To avoid this, add the ILM/DLM memory regions to the root domain region
of the PMPU with permissions set to 0x0 for S/U modes so that any access
to these regions gets blocked and for M-mode we grant full access (R/W/X).
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Add hart_start() and hart_stop() callbacks for the multi-core ae350
platform, it utilizes the ATCSMU to put the harts into power-gated
deep sleep mode. The programming sequence is stated as below:
1. Set the wakeup events to PCSm_WE
2. Set the sleep command to PCSm_CTL
3. Set the reset vector to HARTm_RESET_VECTOR_{LO|HI}
4. Write back and invalidate D-cache by executing the CCTL command L1D_WBINVAL_ALL
5. Disable I/D-cache by clearing mcache_ctl.{I|D}C_EN
6. Disable D-cache coherency by clearing mcache_ctl_.DC_COHEN
7. Wait for mcache_ctl.DC_COHSTA to be cleared to ensure the previous step is completed
8. Execute WFI
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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This patch adds atcsmu support for Andes AE350 platforms. The SMU
provides system management capabilities, including clock, reset
and power control based on power domain partitions.
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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The two referenced commits passed incorrect bounds to the PLIC save/
restore functions, causing out-of-bounds memory access. The functions
expect "num" to be the 1-based number of interrupt sources, equivalent
to the "riscv,ndev" devicetree property. Thus, "num" must be strictly
smaller than the 0-based size of the array storing the register values.
However, the referenced commits incorrectly passed in the unmodified
size of the array as "num". Fix this by reducing PLIC_SOURCES (matching
"riscv,ndev" on this platform), while keeping the same array sizes.
Addresses-Coverity-ID: 1530251 ("Out-of-bounds access")
Addresses-Coverity-ID: 1530252 ("Out-of-bounds access")
Fixes: 8509e46ca63a ("lib: utils/irqchip: plic: Ensure no out-of-bound access in priority save/restore helpers")
Fixes: 9a2eeb4aaeac ("lib: utils/irqchip: plic: Ensure no out-of-bound access in context save/restore helpers")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Add Starfive JH7110 platform implementation
Signed-off-by: Wei Liang Lim <weiliang.lim@starfivetech.com>
Reviewed-by: Chee Hong Ang <cheehong.ang@starfivetech.com>
Reviewed-by: Jun Liang Tan <junliang.tan@starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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We add a generic platform override callback to allow platform specific firmware init.
Signed-off-by: Wei Liang Lim <weiliang.lim@starfivetech.com>
Reviewed-by: Chee Hong Ang <cheehong.ang@starfivetech.com>
Reviewed-by: Jun Liang Tan <junliang.tan@starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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We add a generic platform override callback to allow platform specific
selection of cold boot HART.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
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C language standard uses true/false for the boolean type.
Let's switch to that for better language compatibility.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Tested-by: Samuel Holland <samuel@sholland.org>
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save/restore helpers
Currently the context save/restore helpers writes/reads the provided
array using an index whose maximum value is determined by PLIC, which
potentially may disagree with the caller to these helpers.
Add a parameter to ask the caller to provide the size limit of the
array to ensure no out-of-bound access happens.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
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save/restore helpers
Currently the priority save/restore helpers writes/reads the provided
array using an index whose maximum value is determined by PLIC, which
potentially may disagree with the caller to these helpers.
Add a parameter to ask the caller to provide the size limit of the
array to ensure no out-of-bound access happens.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
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This commit provides basic support for the Renesas RZ/Five
(R9A07G043F) SoC.
The RZ/Five microprocessor includes a single RISC-V CPU Core (Andes AX45MP)
1.0 GHz, 16-bit DDR3L/DDR4 interface. Supported interfaces include:
- Gigabit Ethernet 2ch
- CAN interface (CAN-FD) 2ch
- USB 2.0 interface 2ch
- SD interface 2ch
- AD converter 2ch
Useful links:
-------------
Links: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rz-mpus/rzfive-risc-v-general-purpose-microprocessors-risc-v-cpu-core-andes-ax45mp-single-10-ghz-2ch-gigabit-ethernet
Links: http://www.andestech.com/en/products-solutions/andescore-processors/riscv-ax45mp/
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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It makes sense to use fdt_match_node() instead of fdt_find_match()
in fw_platform_lookup_special() as we already have the start offset
to search from.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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We move andes directory to platform/generic as the necessary fdt
drivers are available, the users can enable the console, timer, ipi,
irqchip and reset devices by adding device tree nodes stated in the
docs/platform/andes-ae350.md.
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Corrected the same parameter of writel_relaxed in sun20i_d1_riscv_cfg_init
to be u32 for a while and u64 for a while.
Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Remove "#include <sbi/sbi_console.h>"
Signed-off-by: Leizheng Zhang <zhangleizheng@eswincomputing.com>
Reviewed-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Xiang W <wxjstz@126.com>
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With the T-HEAD C9XX cores being designed before or during ratification
of the SSCOFPMF extension, they implement a PMU extension that behaves
very similar but not equal to it by providing overflow interrupts though
in a slightly different registers format.
The sun20i-d1 is using this core. So implement the necessary overrides
to allow its pmu to be used via the standard sbi-pmu extension.
For now it's also the only soc using this core, so keep the additional
code in the d1-space for now.
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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Init of non-standard extensions is a platform-specific thing,
so allow generic platforms to do this via a platform-override.
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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We add RISC-V semihosting based serial console for JTAG based early
debugging.
The RISC-V semihosting specification is available at:
https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Kautuk Consul <kconsul@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Add Cadence UART driver
Signed-off-by: Jun Liang Tan <junliang.tan@linux.starfivetech.com>
Signed-off-by: Wei Liang Lim <weiliang.lim@linux.starfivetech.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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The options defined in config.mk can be specified in objects.mk of each
platform so let us remove config.mk from all platforms.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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The generic platform version and default name should be set based
on kconfig options so that users can override it.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update generic platform to use kconfig for enabling/disabling
platform overrides. We also enable all platform overrides in generic
platform defconfig.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update FDT support makefile to use kconfig for enabling/disabling.
To avoid compilation errors, we also enable FDT for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update gpio drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate gpio
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update i2c drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate i2c
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update irqchip drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate irqchip
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update ipi drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate ipi
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update timer drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate timer
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update reset drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate reset
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We update serial drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate serial
drivers for each platform.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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We extend the top-level makefile to allow kconfig based configuration
for each platform where each platform has it's own set of configs with
"defconfig" being the default config.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
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Allwinner D1 contains a "PPU" power domain controller which can
automatically power down/up the CPU power domain. This power domain
includes the C906 core along with its CLINT and PLIC.
This HSM implementation supports non-retentive hart suspend by:
1) Saving/restoring state that is lost during hart suspend,
2) Performing cache maintenance before/after hart suspend,
3) Configuring wakeup sources before hart suspend, and
4) Asking the PPU to power down the hart when it enters WFI.
Since this HSM implementation is for a single-core SoC, it does not need
to worry about concurrency or saving multiple instances of state.
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
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Allow the vendor_ext_check and vendor_ext_provider APIs of the
generic platform to be overridden by other platforms
Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Ignore CPU nodes in FDT which are not enabled.
Signed-off-by: Jan Remes <jan.remes@codasip.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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Let us move SiFive platform overrides for FU540 and FU740 into a separate
directory so better maintainability. Other SoC vendors can also create
their own directory under platform/generic.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
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Instead of having platform override module list hard-coded in the C source,
we generate it using carray.sh at compile-time.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
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We add simple FDT irqchip driver for IMSIC so that generic platform
(and other FDT based platforms) can utilize common IMIC library.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
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When the watchdog is running the HiFive Unmatched board does not reboot
properly and shuts down itself a few seconds after reboot, in the early
stages of the u-boot loading. On a Linux kernel this happens when the
da9063_wdt module is loaded. This does not happen if the module is
unloaded before reboot or if the watchdog module is loaded with
"stop_on_reboot=1".
Fix that by stopping the watchdog before attempting to reset the board.
This is done by zeroing the TWDSCALE field of CONTROL_D register, unless
it was already set to 0.
Reported-by: Tianon Gravi <tianon@debian.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Nikita Shubin <n.shubin@yadro.com>
Tested-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
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da9063_reset() and da9063_shutdown() take the chip address in argument
(like similar functions), but in practice use the da9063 global struct
instead. Fix that.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Xiang W <wxjstz@126.com>
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BUG and BUG_ON are not informative and are rather lazy interfaces, only
telling the user that something went wrong in a given function, but not
what, requiring the user to find the sources corresponding to their
firmware (which may not be available) and figure out how that BUG(_ON)
was hit. Even SBI_ASSERT in its current form, which does include the
condition that triggered it in the output, isn't necessarily very
informative. In some cases, the error may be fixable by the user, but
they need to know the problem in order to have any hope of fixing it.
It's also a nuisance for developers, whose development trees may have
changed significantly since the release in question being used, and so
line numbers can make it harder for them to understand which error case
a user has hit.
This patch introduces a new sbi_panic function which is printf-like,
allowing detailed error messages to be printed to the console. BUG and
BUG_ON are removed, since the former is just a worse form of sbi_panic
and the latter is a worse version of SBI_ASSERT. Finally, SBI_ASSERT is
augmented to take a set of arguments to pass to sbi_panic on failure,
used like so (sbi_boot_print_hart's current error case, which currently
manually calls sbi_printf and sbi_hart_hang):
SBI_ASSERT(xlen >= 1, ("Error %d getting MISA XLEN\n", xlen));
The existing users of BUG are replaced with calls to sbi_panic along
with informative error messages. BUG_ON and SBI_ASSERT were unused (and,
in the case of SBI_ASSERT, remain unused).
Many existing users of sbi_hart_hang should be converted to use either
sbi_panic or SBI_ASSERT after this commit.
Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
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da9063 PMIC can be used to reset/shutdown the
Sifive Unmatched board.
shutdown is done simply by writing SHUTDOWN bit to
DA9063_REG_CONTROL_F register.
reset via setting WAKEUP bit in DA9063_REG_CONTROL_F
register followed by masking POWER and POWER1 domains
and setting STANDBY bit in DA9063_REG_CONTROL_A,
originally discovered by Alexandre Ghiti on linux-riscv
maillists.
Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
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Move the fdt_reset_init() invocation from generic_early_init() to
generic_final_init(). This allows to print error messages.
Ignore the return value of fdt_reset_init() as we should not stop booting
due to failure to initialize reset drivers.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
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