opensbi.git/platform/template, branch v0.7

platform: Use one unified per-HART stack size macro for all platforms

2020-03-14T03:44:00Z

As of today all platforms use 8KB of per-HART stack hence there is no need for each platform to define its own macro or use the magic number. Create one macro for all platforms. Platform still can use its own version if needed. Signed-off-by: Bin Meng Reviewed-by: Anup Patel

platform: Set per-HART stack size to 8KB in the template platform codes

2020-03-14T03:43:20Z

The template platform codes should set per-HART stack size to 8KB to avoid possible mistakes of future platform ports. Signed-off-by: Bin Meng Reviewed-by: Anup Patel

include: Make sbi_current_hartid() as macro in riscv_asm.h

2020-03-13T06:52:02Z

The sbi_current_hartid() being a regular function is quite expensive because for callers it is a function call instead of a direct CSR read. This patch converts sbi_current_hartid() into a macro in riscv_asm.h. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: Remove disabled_hart_mask from sbi_platform

2020-03-11T10:00:12Z

The disabled_hard_mask in sbi_platform is only 64bits wide so we cannot disable a HART with HARTID > 63. To tackle this, we remove disabled_hart_mask and replace it with hart_disabled() platform callback. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra

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

platform: template: typo fix in system reboot/shutdown names

2020-01-24T02:04:10Z

This patch does minor typo fix in system reboot/shutdown names in platform operations. Signed-off-by: Jiuyang Liu (Sequencer) Reviewed-by: Alistair Francis Signed-off-by: Anup Patel

lib: utils: Support CLINT with 32bit MMIO access on RV64 system

2020-01-02T03:44:36Z

It is possible to have a CLINT implementation which supports only 32bit MMIO accesses on RV64 system so this patch extends our CLINT driver such that platform code can specify whether CLINT supports 64bit MMIO access. Signed-off-by: Anup Patel Reviewed-by: Atish Patra Reviewed-by: Zong Li

lib: provide a platform specific tlb range flush threshold

2019-09-10T12:14:10Z

Currently, the tlb range flush threshold is fixed and set to 4k for all platforms. However, it should be platform specific as it completely depends upon how platform actually implements sfence instruction. Define a platform feature that allows every individual platform to set different values. If a platform doesn't define it, just use a page size as the threshold. Signed-off-by: Atish Patra Reviewed-by: Bin Meng Reviewed-by: Anup Patel

platform: Remove the ipi_sync method from all platforms.

2019-08-16T03:12:58Z

OpenSBI manages outstanding TLB flush requests by queueing them in a fifo synchronously. An ipi sync which uses an atomic operation on MMIO address is no longer required. Remove the ipi sync method from platform header and all usage. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

include: Add version info to struct sbi_platform

2019-06-29T13:56:26Z

Add version control of sbi_platform structure - Add opensbi_version, this gives information of opensbi revision on which the sbi_platform table was created. - Add platform_version field in sbi_platform structure for platform level version control. Signed-off-by: Abner Chang Acked-by: Anup Patel