opensbi.git/platform/sifive, branch v0.9

platform: Remove dummy system reset functions

2020-12-01T11:38:47Z

Few platforms have dummy system reset functions so let's remove these dummy system reset functions to allow generic code deal with it in the right way. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Atish Patra

config.mk: Update QEMU run command for generic and sifive fu540 platforms

2020-06-29T03:47:24Z

Since QEMU v5.1, if there is no "-bios" option provided, the default OpenSBI firmware will be loaded by QEMU as the BIOS automatically, hence to load fw_payload type image, we should explicitly pass the "-bios" option to QEMU. Signed-off-by: Bin Meng Reviewed-by: Atish Patra

platform/lib: Allow the OS to map the regions that are protected by PMP

2020-06-15T03:55:44Z

This is achieved by removing the 'no-map' property from the 'reserved-memory' node when PMP is present, otherwise we keep it as it offers a small protection if the OS does not map this region at all. A new callback in platform_override is introduced and allows to fixup the device-tree. It is used here to override this new default behaviour on SiFive Fu540 platforms that has an erratum that prevents S-mode software to access a PMP protected region using 1GB page table mapping. If PMP is present, telling the OS not to map the reserved regions does not add much protection since it only avoids access to regions that are already protected by PMP. But by not allowing the OS to map those regions, it creates holes in the OS system memory map and prevents the use of hugepages which would generate, among other benefits, less TLB miss. Signed-off-by: Alexandre Ghiti Reviewed-by: Atish Patra Reviewed-by: Anup Patel

lib: utils: Allow CLINT functions to be used for multiple CLINTs

2020-05-23T05:06:43Z

We extend CLINT cold init function to have a "struct clint_data *" parameter pointing to CLINT details. This allows platforms to use CLINT functions for multiple CLINT instances. When multiple CLINTs are present, the platform can also provide one of the CLINT as reference CLINT for other CLINTs. This will help CLINTs to sync their time value with reference CLINT using a time_delta computed in warm init function. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Allow PLIC functions to be used for multiple PLICs

2020-05-23T05:06:29Z

We extend all PLIC functions to have a "struct plic_data *" parameter pointing to PLIC details. This allows platforms to use these functions for multiple PLIC instances. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Remove redundant parameters from PLIC init functions

2020-05-23T05:06:26Z

The "target_hart" and "hart_count" parameters of PLIC cold and warm init functions are only used for sanity checks and not required in PLIC initialization. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi_platform: Combine reboot and shutdown into one callback

2020-04-27T09:05:29Z

We can achieve shutdown, cold reboot, and warm reboot using just one sbi_platform callback so we combine system_reboot() and system_shutdown() callbacks into one system_reset() callback. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: No need to provide default PMP region using platform callbacks

2020-04-27T08:27:27Z

The default (usually last) PMP region provides S-mode access to complete memory range not covered by other PMP regions. Currently, the default PMP region is described as platform specific PMP region which is not appropriate because all platforms need it and default PMP region should be part of generic library. Signed-off-by: Anup Patel Reviewed-by: Atish Patra Reviewed-by: Bin Meng

lib: utils: Move fdt fixup helper routines to a different file

2020-03-24T08:00:32Z

FDT helper file contain both fdt fixup and parsing functions. Split the fixup related functions to a separate file for a better code organization. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

platform: sifive/fu540: Remove FU540_ENABLED_HART_MASK option

2020-03-19T04:02:45Z

The FU540_ENABLED_HART_MASK compile time option was added for initial bring-up on SiFive Unleashed. This option is redundant now because disabled_hart_mask is already removed. Based on this rationale, we remove FU540_ENABLED_HART_MASK compile time option. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra