opensbi.git/include/sbi_utils, branch v0.9

lib: utils: Remove fdt_domain_get() function

2020-12-16T04:40:25Z

The fdt_domain_get() function is now redundant because the fdt_domains_populate() function can explicitly register new domains using the sbi_domain_register() function. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Atish Patra

lib: utils: Allow FDT domain iteration functions to fail

2020-12-16T04:40:19Z

We extend fdt_iterate_each_domain() and fdt_iterate_each_memregion() functions to allow underlying iteration function to fail. This will help us catch more domain misconfiguration issues at boot time. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Atish Patra

lib: utils: Add helper routines to populate domains from FDT

2020-12-04T15:40:44Z

We add various helper routines to populate domains, iterate domains, iterate domain memregions, and parse HART to domain assignment from the FDT. These helper routines can be used by platform support code and FDT fixup code. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Improve system reset platform operations

2020-12-01T11:40:31Z

To implement the SBI SRST extension, we need two platform operations for system reset: 1) system_reset_check() - This operation will check whether given reset type and reason are supported by the platform 2) system_reset() - This operation will do the actual platform system reset and it will not return if reset type and reason are supported by the platform This patch updates system reset related code everywhere as-per above. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

platform: Add support for Shakti C-class SoC from IIT-M

2020-06-19T03:51:46Z

C-Class is a member of the SHAKTI family of processors from Indian Institute of Technology - Madras(IIT-M). It is an extremely configurable and commercial-grade 5-stage in-order core supporting the standard RV64GCSUN ISA extensions. https://gitlab.com/shaktiproject/cores/c-class/blob/master/README.md We add OpenSBI support for Shakti C-class SoC. Signed-off-by: Vijai Kumar K Reviewed-by: Anup Patel

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: Add fdt_parse_clint_node() function

2020-05-23T05:06:46Z

We add fdt_parse_clint_node() function which will be used by fdt_ipi_clint and fdt_timer_clint drivers to parse CLINT details from DT node. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

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: Extend fdt_find_match() Implementation

2020-05-23T05:06:33Z

We extend fdt_find_match() implementation by adding node offset parameter which represents the first node to match from. The improved fdt_find_match() can be used to find multiple match nodes. 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