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2022-01-21lib: fix pointer of type 'void *' used in arithmeticJukka Laitinen10-20/+20
Using "void *" in arithmetic causes errors with strict compiler settings: "error: pointer of type 'void *' used in arithmetic [-Werror=pointer-arith]" Avoid these by calculating on "char *" where 1-byte data size is assumed. Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae> Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn> Reviewed-by: Xiang W <wxjstz@126.com> Reviewed-by: Anup Patel <anup@brainfault.org>
2022-01-11lib: utils/sys: Extend HTIF library to allow custom base addressSDK_v2.0.0Anup Patel3-12/+97
Some of RISC-V emulators provide HTIF at fixed base address so for such emulators users have to hard-code HTIF base address in the linker script. To address this problem, we let users optionally provide fixed HTIF base address via platform support (or device tree). Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn> Reviewed-by: Atish Patra <atishp@rivosinc.com>
2022-01-11lib: utils/ipi: Fix size check in aclint_mswi_cold_init()Anup Patel1-1/+1
Currently, the ACLINT MSWI size check is forcing size to be at least 0x4000. This is inappropriate check because most systems will never utilize full 16KB for a single ACLINT MSWI device so instead we should check that ACLINT MSWI size is enough for on the associated HARTs. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2021-12-03lib: pmu: support the event ID encoded by a bitmap.Vincent Chen1-7/+9
RISC-V privilege specification does not specify how to encode the event ID. Therefore, each platform is allowed to customize its own encoding rule. The common encoding methods are as follow, directly assigning a number to an event, or every bit in the mphmevent CSR controls one specified event or mixes the above two methods. To enable OpenSBI to support the above three encoding methods simultaneously, this patch repurpose the dt property "riscv,raw-event-to-mhpmcounters". The "riscv,raw-event-to-mhpmcounters" will describes the one or multiple raw events that could be counted by a set of counters. But, the column number of "riscv,raw-event-to-mhpmcounters" is extended from 2 to 3. The 1st column (64bit) is the ID of the raw events. The 2nd column (64bit) represents a select_mask now to represent the bits used for event ID encoding. If a platform directly encodes each raw PMU event as a unique ID, the value of select_mask will be 0xffffffff_ffffffff. Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Signed-off-by: Atish Patra<atishp@rivosinc.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-11-18lib: utils: Add LiteX UART supportGabriel Somlo4-0/+106
Add support for the UART provided by the LiteX SoC framework (https://github.com/enjoy-digital/litex), based on its FDT info (described in the Linux tree at Documentation/devicetree/bindings/serial/litex,liteuart.yaml). Signed-off-by: Gabriel Somlo <gsomlo@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-11-12lib: utils/i2c: Add minimal SiFive I2C driverNikita Shubin3-0/+281
Minimum SiFive I2C driver to read/send bytes over I2C bus. This allows querying information and perform operation of onboard PMIC, as well as power-off and reset. 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>
2021-11-12lib: utils/i2c: Add simple FDT based I2C frameworkNikita Shubin2-0/+88
FDT based I2C framework on the top of I2C library. The drivers are probed on demand by fdt_i2c_adapter_get function. 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>
2021-11-12lib: utils/i2c: Add generic I2C configuration libraryNikita Shubin2-0/+85
Helper library to keep track of registered I2C adapters, identified by dts offset, basic send/read functions and adapter configuration (enable, set dividers, etc...). 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>
2021-11-12lib: utils/reset: separate driver init funcNikita Shubin1-16/+21
Move driver init code to separate function, so it can be reused elsewhere. 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>
2021-11-12lib: utils/reset: add priority to gpio resetNikita Shubin1-2/+8
Make gpio_system_reset_check return priority instead of just true/false. Make default 128 priority for reset/shutdown. 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>
2021-11-11lib: utils: Rename the prefix in PMU DT propertiesAtish Patra1-6/+6
As per the DT schema rules, the prefix should be vendor. As the PMU properties are generic for all vendors, change the prefix to riscv instead of pmu. Reviewed-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Atish Patra <atish.patra@wdc.com>
2021-11-11lib: sbi: Enable PMU extension for platforms without mcountinhibitAtish Patra1-0/+4
Some platforms such as hifive unmatched doesn't implement mcountinhibit csr. However, it has hardware events that can be monitored using 2 hpmcounter it has (i.e. mhpmcounter3 & mhpmcounter4). Currently, PMU extension disabled if mcountinhibit is absent. That's not really necessary as long as the supervisor OS keeps track of the delta value of the counters. Without mcountinhibit, the delta value won't be entirely accurate because the counters are freely running. However, that should be fine to produce an approximate counter value which can help performance analysis. Perf sampling won't work though as sscof extension is not present in hifive unmatched. Reviewed-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Atish Patra <atish.patra@wdc.com>
2021-11-08lib: sbi: error handling in fdt_reset_init()Heinrich Schuchardt1-7/+6
The initialization of a reset driver may fail for various reasons, like a PMIC based reset driver not finding the required I2C driver. The return code of the init routine may take other error values than -ENODEV. If the initialization of a reset driver fails, this should not lead to the board hanging. It is enough that the reset driver does not call sbi_system_reset_add_device() to avoid invoking the driver for a device that could not be initialized. Change the return type of fdt_reset_init() to void. Print a message if an error occurs. 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>
2021-11-03lib: utils/gpio: use list for driversNikita Shubin1-30/+12
Convert static array to sbi_list. This removes size limitation, makes add/remove more efficient and saves space. Signed-off-by: Nikita Shubin <n.shubin@yadro.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-11-02include: sbi_utils: Introduce an helper to get fdt base addressAlexandre Ghiti5-5/+5
This simply adds an helper to get fdt address which is more explicit than sbi_scratch_thishart_arg1_ptr. Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Reviewed-by: Xiang W <wxjstz@126.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-11-02lib: utils/reset: Register separate GPIO system reset devicesAnup Patel1-19/+41
Now that sbi_system support multiple system reset devices, we should register separate devices for GPIO restart and GPIO poweroff because DT describes these as separate devices with different compatible strings. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
2021-10-21lib: utils/irqchip: Automatically delegate T-HEAD PLIC accessOpenSBI-v0.9-78c2b19Samuel Holland2-8/+15
The T-HEAD PLIC implementation requires setting a delegation bit to allow access from S-mode. Now that the T-HEAD PLIC has its own compatible string, set this bit automatically from the PLIC driver, instead of reaching into the PLIC's MMIO space from another driver. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-10-11lib: sbi: convert reset to listNikita Shubin5-5/+5
To support different handlers for different types of resets, we are adding a sbi_list of restart handlers. Instead of sbi_system_reset_set_device we use sbi_system_reset_add_device to reflect the actual meaning. Signed-off-by: Nikita Shubin <n.shubin@yadro.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-10-01lib: utils: identify supported GPIO reset methodsHeinrich Schuchardt1-23/+21
The GPIO reset driver supports reset and poweroff. But not all boards support both. gpio_system_reset_check() must detect this situation. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-09-26lib: utils/reset: use sbi_timer_mdelay() in gpio reset driverAnup Patel1-10/+3
We should use sbi_timer_mdelay() instead of custom gpio_mdelay() in the gpio reset driver. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-09-26lib: sbi: Add timer frequency to struct sbi_timer_deviceAnup Patel2-0/+7
Generic mdelay() and udelay() functions can be provided by the sbi_timer framework if timer frequency is available in the timer instance provided by the platform support or timer driver. This patch adds timer frequency (timer_freq) member in the struct sbi_timer_device for above purpose. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-09-26lib: utils/fdt: Add fdt_parse_timebase_frequency() functionAnup Patel1-0/+21
We add fdt_parse_timebase_frequency() function which can be used by ACLINT mtimer driver and platform code to get timebase frequency. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-09-14lib: utils/reset: Add a sunxi watchdog reset driverOpenSBI-v0.9-395ff7eSamuel Holland3-0/+80
One of the watchdogs in the D1 SoC provides a "soft reset" function, which allows software to immediately reset the entire SoC. Add a driver so it can implement the SBI system reset function. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-09-14lib: utils/reset: Sort fdt_reset driver listSamuel Holland2-3/+3
In preparation for adding a new fdt_reset driver, ensure the existing lists are sorted alphabetically. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-08-14lib: utils/timer: Simplify MTIMER synchronizationAnup Patel2-32/+77
We simplify MTIMER synchronization as follows: 1) Detect MTIMER devices with unique (or non-shared) MTIME register at boot-time 2) Select first MTIMER device with no associated HART as our reference MTIMER device 3) Only synchronize MTIMER devices with unique (or non-shared) MTIME register using reference MTIMER device 4) Directly update the MTIME register at time of synchronization because MTIME is a read/write register. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-08-14lib: utils/timer: Allow ACLINT MTIMER supporting only 32-bit MMIOAnup Patel1-0/+3
We can have ACLINT MTIMER devices which only support 32-bit MMIO accesses on RV64 system so this patch adds a boolean DT property "mtimer,no-64bit-mmio" to detect this from MTIMER DT node. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-08-14lib: utils/fdt: Extend fdt_parse_aclint_node() functionAnup Patel3-29/+47
The fdt_parse_aclint_node() is used to parse DT node for SiFive CLINT, ACLINT MTIMER, and ACLINT MSWI devices. The ACLINT MTIMER has undergone following changes: 1) MTIMER DT node now requires separate addresses in for MTIME register and MTIMECMPx registers in the reg DT property. 2) MTIMER DT node might have no interrupts-extended DT property when the MTIMER device has no associated HARTs (i.e. the MTIMER device has no MTIMECMPx registers) This patch extends fdt_parse_aclint_node() to handle above mentioned changes in ACLINT MTIMER DT bindings. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-08-14lib: utils: Extend fdt_get_node_addr_size() for multiple register setsAnup Patel3-10/+25
We add "index" parameter to fdt_get_node_addr_size() API so that calling function can specify index of desired register set. This will allow fdt_get_node_addr_size() to handle DT nodes with multiple register sets. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-08-14lib: utils/timer: Allow separate base addresses for MTIME and MTIMECMPAnup Patel2-25/+69
We extend the ACLINT library to support separate base addresses for MTIME and MTIMECMP registers. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-08-07lib: utils/fdt: Change addr and size to uint64_tBin Meng3-12/+13
The maximum address and size encoded in DT are 64-bit numbers, so we should use uint64_t for 'addr' and 'size' in fdt_get_node_addr_size(). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-07-27lib: utils: support both of gpio-poweroff, gpio-resetHeinrich Schuchardt2-2/+12
The generic GPIO reset driver has two entries in the match table: "gpio-poweroff", "gpio-reset". Only the first entry is considered by fdt_reset_init(). Define "gpio-poweroff" and "gpio-reset" as compatibility strings of two separate reset drivers. They still can share code. Fixes: e3d6919d10d7 ("lib: utils/reset: Add generic GPIO reset driver") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-27lib: utils: remove unused variable in fdt_reset_initHeinrich Schuchardt1-3/+0
The value of variable current_driver is unused. Remove the variable. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/reset: Add generic GPIO reset driverGreen Wan3-0/+144
We add generic GPIO reset driver inspired from gpio-restart and gpio-poweroff drivers of Linux kernel. Signed-off-by: Green Wan <green.wan@sifive.com> Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/gpio: Add minimal SiFive GPIO driverGreen Wan3-0/+109
We add a minimal SiFive GPIO driver so that we can do GPIO based system power-off and reset. Signed-off-by: Green Wan <green.wan@sifive.com> Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/gpio: Add simple FDT based GPIO frameworkAnup Patel2-0/+133
We add a simple FDT based GPIO framework which is built on top of generic GPIO library. The phandle of FDT GPIO chip DT node is treated as unique GPIO chip ID required by the generic GPIO library. The FDT based GPIO chip drivers will be probed on-demand from fdt_gpio_pin_get() called by the GPIO client drivers. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/gpio: Add generic GPIO configuration libraryAnup Patel2-0/+126
We add generic GPIO configuration library which is independent of hardware description format (FDT or ACPI). The OpenSBI platform support or GPIO drivers can register GPIO chip instances which can be discovered and used by different GPIO clients. Each GPIO chip instance has a unique ID which can be used by GPIO clients to lookup GPIO chip instance. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-17lib: utils/fdt: Add fdt_parse_phandle_with_args() APIAnup Patel1-0/+47
The libfdt project does not have a generic API to parse phandle with args from a DT node so we add fdt_parse_phandle_with_args() for this purpose. This new API will be useful to FDT based drivers. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-07-11lib: utils: Drop dependency on libgcc by importing part of FreeBSD's libquadJessica Clarke10-0/+682
We only need libgcc for 64-bit division on RV32. Whilst GCC toolchains bundle libgcc, Clang toolchains tend not to ship libclang_rt.builtins given every compiler is a cross-compiler for every target and so you would need a silly number of builds of it, with only the native library available; only vendor-provided Clang toolchains specifically for bare metal cross-compiling are likely to provide it. Thus, import part of FreeBSD's implementation of the division support functions needed and stop linking against libgcc. Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com> Reviewed-by: Anup Patel <anup.patel@wdc.com> Tested-by: Anup Patel <anup.patel@wdc.com>
2021-07-11utils: fdt: Add fdt helper functions to parse PMU DT nodesAtish Patra3-0/+114
The PMU DT node bindings are defined in docs/pmu_support.md Add few fdt helper functions to parse the DT node and update the event-counter mapping tables. Reviewed-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Atish Patra <atish.patra@wdc.com>
2021-07-05lib: utils: reset: unify naming of 'sifive_test' deviceGreen Wan3-4/+4
Unify all the file and function names of 'sifive_test' device, to use the same prefix. This is also a preparatory patch for upcoming sifive reset device. Signed-off-by: Green Wan <green.wan@sifive.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-06-24platform: Replace CLINT library usage with ACLINT libraryAnup Patel2-257/+0
The ACLINT devices are backward compatible with SiFive CLINT so we replace all CLINT library usage in various platforms with ACLINT library. As a result of this replacement, the CLINT library is not used by any part of OpenSBI hence we remove it. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-06-24lib: utils/timer: Add FDT based ACLINT MTIMER driverAnup Patel4-60/+77
We add a new FDT based ACLINT MTIMER driver which works for both CLINT device and standalone ACLINT MTIMER device. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-06-24lib: utils/ipi: Add FDT based ACLINT MSWI IPI driverAnup Patel4-54/+70
We add a new FDT based ACLINT MSWI IPI driver which works for both CLINT device and standalone ACLINT MSWI device. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-06-24lib: utils: Add FDT parsing API common for both ACLINT and CLINTAnup Patel3-18/+27
We add fdt_parse_aclint_node() which can parse both ACLINT and CLINT DT nodes. This means fdt_parse_clint_node() is not required anymore so we remove it as well. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-06-24lib: utils/ipi: Add ACLINT MSWI libraryAnup Patel2-0/+101
We add common ACLINT MSWI library similar to the CLINT library so that OpenSBI platforms can use it. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-06-24lib: utils/timer: Add ACLINT MTIMER libraryAnup Patel2-0/+181
We add common ACLINT MTIMER library similar to the CLINT library so that OpenSBI platforms can use it. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Xiang W <wxjstz@126.com>
2021-06-22lib: utils/libfdt: Upgrade to v1.6.1 releaseBin Meng11-104/+226
Sync with libfdt v1.6.1 release source codes. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-06-11lib: utils: missing initialization in thead_reset_initHeinrich Schuchardt1-4/+6
If property csr-copy does not exist, fdt_getprop() will return NULL and cnt will have a random value from the stack. Call clone_csrs() only if cnt is initialized to a non-zero value. Fixes: 49e422c5ad7a ("lib: utils: reset: Add T-HEAD sample platform reset driver") Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2021-06-02lib: utils: consider ':' in stdout-pathHeinrich Schuchardt1-3/+12
The value of the /chosen/stdout-path devicetree property is used to determine the UART used by openSBI. According to the devicetree specification the value may contain a hyphen, e.g. chosen {                 stdout-path = "/serial@f00:115200";         }; If the character ':' is present, it terminates the path of the device. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2021-05-24lib: utils: Try other FDT drivers when we see SBI_ENODEVAnup Patel5-0/+17
We should try other FDT drivers when we see SBI_ENODEV returned by cold_init() of FDT driver. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Xiang W <wxjstz@126.com>