opensbi.git/platform/generic, branch v1.1

platform: Add HSM implementation for Allwinner D1

2022-06-13T06:29:09Z

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 Signed-off-by: Samuel Holland

platform: generic: add overrides for vendor extensions

2022-06-13T05:47:38Z

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 Reviewed-by: Anup Patel

platform: generic: check if CPU node is enabled

2022-05-14T04:47:33Z

Ignore CPU nodes in FDT which are not enabled. Signed-off-by: Jan Remes Reviewed-by: Xiang W Reviewed-by: Anup Patel

platform: generic: Move Sifive platform overrides into own directory

2022-05-13T03:57:23Z

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 Reviewed-by: Atish Patra

platform: generic: Generate platform override module list at compile-time

2022-05-13T03:57:18Z

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 Reviewed-by: Atish Patra

lib: utils/irqchip: Add FDT based driver for IMSIC

2022-02-15T15:07:05Z

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 Signed-off-by: Anup Patel Reviewed-by: Atish Patra

platform: sifive_fu740: fix reset when watchdog is running

2022-01-21T16:14:57Z

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 Signed-off-by: Aurelien Jarno Reviewed-by: Nikita Shubin Tested-by: Nikita Shubin Reviewed-by: Anup Patel

platform: sifive_fu740: do not use a global in da9063_reset/shutdown

2022-01-21T16:11:33Z

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 Reviewed-by: Nikita Shubin Reviewed-by: Anup Patel Reviewed-by: Xiang W

lib: sbi: Improve fatal error handling

2021-12-02T03:20:36Z

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 Reviewed-by: Anup Patel Reviewed-by: Xiang W Reviewed-by: Atish Patra

platform: sifive_fu740: add platform reset driver

2021-11-12T04:59:20Z

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 Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin