opensbi.git/include/sbi/sbi_scratch.h, branch v1.6

include: sbi: Fix typo error

2024-11-11T12:23:32Z

Fix typo in comments describing SBI_SCRATCH_FW_HEAP_SIZE_OFFSET. Signed-off-by: Zhang RunMin Reviewed-by: Anup Patel

include: sbi: Optimize reads of mhartid and mscratch

2024-10-28T05:21:37Z

csr_read() is marked as volatile and clobbering memory, which is generally the safe thing to do. However, these two CSRs do not have any side effects, and the values returned do not change between calls. The compiler can generate better code if we allow it to reorder calls to these functions and cache the return value. Introduce csr_read_relaxed() for this use case. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

include: sbi: Store the hart index in struct sbi_scratch

2024-09-25T06:30:47Z

This is a more efficient way to get the index of the current hart than calling a function to loop through the hartindex -> hartid lookup table. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

include: sbi: Add trap_context pointer in struct sbi_scratch

2024-03-19T06:01:20Z

To track nested traps, the struct sbi_scratch needs a pointer the current trap context so add trap_context pointer in struct sbi_context. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland Tested-by: Samuel Holland

lib: sbi: Remove sbi_trap_exit() and related code

2024-03-19T06:01:18Z

Over the years, no uses of sbi_trap_exit() have been found so remove it and also remove related code from fw_base.S and sbi_scratch.h. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland Tested-by: Samuel Holland

lib: sbi: Remove sbi_scratch_last_hartid() macro

2023-09-24T06:11:54Z

The sbi_scratch_last_hartid() macro is not of much use on platforms with really sparse hartids so let us replace use of this macro with other approaches. Signed-off-by: Anup Patel

lib: sbi: Introduce HART index in sbi_scratch

2023-09-24T06:09:21Z

We introduce HART index and related helper functions in sbi_scratch where HART index is contiguous and each HART index maps to a physical HART id such that 0 <= HART index and HART index < SBI_HARTMASK_MAX_BITS. The HART index to HART id mapping follows the index2id mapping provided by the platform. If the platform does not provide index2id mapping then identity mapping is assumed. Signed-off-by: Anup Patel

lib: sbi: Print scratch size and usage at boot time

2023-06-05T10:16:22Z

The scratch space being a scarce resource so let us print it's size and usage at boot time. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

platform: Allow platforms to specify heap size

2023-06-05T10:15:33Z

We extend struct sbi_platform and struct sbi_scratch to allow platforms specify the heap size to the OpenSBI firmwares. The OpenSBI firmwares will use this information to determine the location of heap and provide heap base address in per-HART scratch space. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

include: sbi_scratch: Add helper macros to access data type

2023-06-05T10:12:50Z

Reading and writing a data type in scratch space is a very common use-case so let us add related helper macros in sbi_scratch.h. Signed-off-by: Anup Patel