opensbi.git/lib/sbi/objects.mk, branch v0.9

lib: sbi: Add initial domain support

2020-10-20T05:52:15Z

An OpenSBI domain is a logical entity representing a set of HARTs and a set of memory regions for these HARTs. The OpenSBI domains support will allow OpenSBI platforms and previous booting stage (i.e. U-Boot SPL, Coreboot, etc) to partition a system into multiple domains where each domain will run it's own software. For inter-domain isolation, OpenSBI will eventually use various HW features such as PMP, ePMP, IOPMP, SiFive shield, etc but initial implementation only use HW PMP support. This patch provides initial implementation of OpenSBI domains where we have a root/default domain and OpenSBI platforms can provide non-root/custom domains using domain_get() callback. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Atish Patra

lib: Add platform features in boot time print

2020-05-10T04:54:08Z

We have now clear distinction between platform and hart features. Modify the boot print messages to print platform features in a string format. In the process, this patch moved relatively larger functions to its own file from platform.h header file. Signed-off-by: Atish Patra Tested-by: Jonathan Balkind Reviewed-by: Anup Patel

lib: Create a separate math helper function file

2020-05-10T04:29:24Z

There may be few common mathematics helper functions which can be used anywhere in OpenSBI project. Add a separate math helper function file to add these functions. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Rename unprivileged trap handler

2020-05-10T04:29:16Z

Unprivileged trap handler can be reused for any cases where the executing code expects a trap. Rename it to "expected" trap handler as it will be used in other cases in future. Signed-off-by: Atish Patra Tested-by: Jonathan Balkind Reviewed-by: Anup Patel

lib: Optimize unpriv load/store implementation

2020-03-28T08:01:53Z

This patch optimize unpriv load/store implementation by having dedicated unpriv trap handler (just like KVM RISC-V). As a result of this optimization: 1. We have reduced roughly 13+ instruction in all unpriv load/store functions. The reduced instruction also include two function calls. 2. Per-HART trap info pointer in scratch space is now redundant hence removed. 3. The sbi_trap_handler() is now much cleaner because we don't have to handle unpriv load/store traps. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Simple bitmap library

2020-03-11T09:59:45Z

We add simple bitmap library which will help us create and maintain bitmaps. It will also help us create a simple HART mask library. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra

lib: Sort build objects in alphabetical order

2020-03-10T04:32:48Z

Signed-off-by: Bin Meng Reviewed-by: Anup Patel

include: sbi_bitops: More useful bit operations

2020-03-08T05:39:46Z

This patch extends our bit operation library with mechanism to: 1. Iteratively traverse bits 2. Set bit 3. Clear bit 4. Change bit 5. ... other helpful functions ... Most the above is adopted from Xvisor sources. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Implement Hart State Management (HSM) SBI extension

2020-02-24T12:43:23Z

This patch adds support HSM extension. The specification is available at https://github.com/riscv/riscv-sbi-doc. It allows to implement hart hotplug and fixed ordered hart booting in supervisor. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Implement hart hotplug

2020-02-24T12:37:55Z

This patch adds support for hart hotplug in OpenSBI using a generic WFI based approach. Hart hotplug can be achieved via SBI HSM extension which allows supervisor mode software to start or stop any harts anytime. Any platform wishes to implement platform specific hart hotplug must implement both hart_start and hart_stop in addition to enable platform feature SBI_PLATFORM_HAS_HART_HOTPLUG. Signed-off-by: Atish Patra Reviewed-by: Anup Patel