opensbi.git/include/sbi/sbi_platform.h, branch v0.6

platform: Add an platform ops to return platform specific tlb flush limit

2020-02-05T05:07:11Z

If a platform requires to perform a tlb full flush, they should set the tlb_range_flush_limit value to zero. However, corresponding platform API ignore the value and continue to return the default value. Add a platform ops to retrieve platform specific tlb range flush limit. The platform variable becomes redundant in presence of the platform ops. Take this opportunity to remove the variable as well. The default is still set to smallest page size in RISC-V (4KB), as there is no way to figure out a best value for all platforms. Individual platform should set it to the optimal value for their platform. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Add irqchip exit API

2020-01-07T06:41:19Z

We add an optional platform irqchip exit hook for exit path handling in sbi_exit() implementation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Add ipi exit API

2020-01-07T06:41:02Z

We add sbi_ipi_exit() API for exit path handling in sbi_exit() implementation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Add timer exit API

2020-01-07T06:40:55Z

We add sbi_timer_exit() API for OpenSBI exit path handling in sbi_exit() implementation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Add system early_exit and final_exit APIs

2020-01-07T06:40:48Z

This patch adds system-level early_exit and final_exit APIs with corresponding platform hooks. These new APIs will be primarily used by sbi_exit() in OpenSBI exit path. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi_platform: fix compilation for GCC-9

2019-12-05T21:45:50Z

GCC-9 will throw a warning when using the %s format specifier with a possible NULL parameter and since -Werror is used, the compilation breaks for GCC-9. In function 'sbi_boot_prints', inlined from 'init_coldboot' at /opensbi/lib/sbi/sbi_init.c:107:3, inlined from 'sbi_init' at /opensbi/lib/sbi/sbi_init.c:189:3: /opensbi/lib/sbi/sbi_init.c:56:2: error: '%s' directive argument is null [-Werror=format-overflow=] 56 | sbi_printf("Platform Name : %s\n", sbi_platform_name(plat)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors This is one way to fix this, currently there is nothing in the tree checking for `sbi_platfrom_name() == NULL` so we can just return "Unknown" instead of NULL on failure. Signed-off-by: Martin Pietryka Reviewed-by: Anup Patel Tested-by: David Abdurachmanov

lib: Fix CPU capabilities detection function

2019-11-26T10:36:29Z

On some platforms, misa may not be implemented. On such a platform, reading misa will get 0. At this time, platform is required to implement a non-standard function to detect the CPU's capabilities. Therefore, this modification add interfaces for non-standard function. The MXL field of misa is always at the highest two bits, whether it is a 32-bit 64-bit or a 128-bit machine. Therefore, this modification fixes the use of a fixed offset to detect the machine length. Signed-off-by: Xiang Wang Signed-off-by: Anup Patel

lib: Simplify trap parameters in sbi_ecall functions

2019-11-21T08:28:14Z

The out_tcause and out_tval parameters are not sufficient for most sbi_ecall functions because this will grow in-future when we support RISC-V hypervisor v0.5 draft. We replace these parameters with out_trap which is a pointer to struct sbi_trap_info. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Provide a platform hook to implement vendor specific SBI extensions.

2019-10-03T03:28:51Z

SBI v0.2 specification allows vendor extensions and it should be implemented in a independent of the core sbi library. Introduce a single platform callback that will let platforms handle all vendor extensions in platform specific code if they want. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Fix tlb flush range limit value

2019-09-28T12:51:34Z

Use platform defined flush range limit value only if it is non-zero. Otherwise, use the default value. Signed-off-by: Atish Patra Reviewed-by: Bin Meng