opensbi.git/lib/sbi, branch v0.6

lib: Simplify the for-loop in sbi_ipi_send_many()

2020-02-24T03:40:04Z

We don't need to separately call sbi_ipi_send() for current HART in sbi_ipi_send_many(). Instead, we can simplify the for-loop in sbi_ipi_send_many() and call sbi_ipi_send() for all HARTs in the for-loop itself. Signed-off-by: Anup Patel Reviewed-by: Bin Meng

lib: Use available hart mask for correct hbase value

2020-02-22T04:36:51Z

As per the latest SBI specification, all online harts should receive IPI if hbase is set to -1. Set the target mask to all available hart mask if hbase is -1. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Fix typo in atomic exchange functions

2020-02-22T04:34:38Z

There is a typo in atomic operations code which prevents the usage of riscv atomic instructions even if it is supported. Fix the typo. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Print interrupt and exception delegation in boot prints

2020-02-19T04:28:48Z

We print MIDELEG and MEDELEG CSRs as part of boot prints so that boot log shows the interrupts and exceptions delegated to S-mode. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra

lib: Don't check MIDELEG and MEDELEG at end of delegate_traps()

2020-02-19T04:28:45Z

The MIDELEG and MEDELEG CSR checks at end of delegate_traps() were added for initial bring-up on SiFive Unleashed and QEMU. These checks are not required any more and in-future these checks can cause failures because some of the MIDELEG/MEDELEG bits will be hard-wired to 0 or 1. For related discussion, refer github issue: https://github.com/riscv/opensbi/issues/157 Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra

Revert "lib: Use __builtin_ctzl() in pmp_get()"

2020-02-18T03:58:33Z

This reverts commit 897b8fbdd92fcfad194417d348b8dad16ab0e17a. We are seeing compile errors using newlib based GCC cross-toolchain so we restore back old ctz() implementation. Signed-off-by: Anup Patel

lib: Initialize out value in SBI calls

2020-02-13T04:27:22Z

As per the SBI specification, the return value in sbiret is undefined if not explicitly described in the function. However, supervisor may check this value by mistake and get a garbage value. Initialize it to zero to avoid nasty supervisor bugs. Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: Use __builtin_ctzl() in pmp_get()

2020-02-13T03:40:57Z

We should should __builtin_ctzl() in pmp_get() instead of custom ctz() function. Signed-off-by: Li Jinpei Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi_scratch: use bitwise ops in sbi_scratch_alloc_offset()

2020-02-13T03:40:55Z

Instead of using loop to make "size" machine word aligned, we should use bitwise ops. Signed-off-by: Li Jinpei Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: Factor-out SBI base extension

2020-01-22T06:43:47Z

This patch factor-out SBI base extension into its own source for better modularity of SBI implementation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra