starfive-tech/opensbi.git/include/sbi, branch debug

include: headers: Replace ASSEMBLY with ASSEMBLER

2021-03-22T10:32:48+00:00

GCC has already a predefined macro __ASSEMBLER__ therefore, it can be used without the need to define a new flag with -D__ASSEMBLY__. This is useful when adding the library to projects having a build system such one can build without the need to make changes. THe build system does not use the Makefile in the sources tree. Signed-off-by: Marouene Boubakri Signed-off-by: Anup Patel

firmware: Support position independent execution

2021-03-19T09:30:50+00:00

Enable OpenSBI to support position independent execution. Because the position independent code will cause an additional GOT reference when accessing the global variables, it will reduce performance a bit. Therefore, the position independent execution is disabled by default. Users can through specifying "FW_PIC=y" on the make command to enable this feature. In theory, after enabling position-independent execution, the OpenSBI can run at arbitrary address with appropriate alignment. Therefore, the original relocation mechanism will be skipped. In other words, OpenSBI will directly run at the load address without any code movement. Signed-off-by: Vincent Chen Reviewed-by: Anup Patel

include: sbi: SBI function IDs for RFENCE extension

2021-03-12T04:02:53+00:00

The SBI function IDs for RFENCE extension must match the SBI specification. Signed-off-by: Heinrich Schuchardt Reviewed-by: Atish Patra

include: sbi: Upgrade SBI implementation version to v0.3

2021-03-03T08:24:44+00:00

The OpenSBI SBI implementation is now compliant with latest draft SBI v0.3 specification so let's upgrade SBI implementation version. This will also help HSM suspend function detection in S-mode because HSM suspend function is only present when HSM extension is present and SBI implementation version is 0.3 (or higher). Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Implement SBI HSM suspend function

2021-03-03T08:21:15+00:00

This patch implements the SBI HSM suspend function. Using this new SBI call, the S-mode software can put calling HART in platform specific suspend (i.e. low-power) state. For a successful retentive suspend, the SBI call will return without errors upon resuming whereas for a successful non-retentive suspend, the SBI call will resume from a user provided resume address. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi: Add hart_suspend() platform callback

2021-03-03T04:49:24+00:00

We add hart_suspend() callback in platform operations which will be used by HSM implementation to enter retentive or non-retentive suspend state. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Add sbi_hart_reinit() function

2021-03-03T04:49:18+00:00

We add sbi_hart_reinit() function which will re-initialize HART CSRs assuming HART features are already detected. This new function will be useful in re-initializing HART after it resumes from HSM SUSPENDED state. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi: Add HSM suspend related defines

2021-03-03T04:49:13+00:00

This patch adds SBI HSM suspend related defines to ecall interface header. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Rename sbi_hsm_hart_started_mask() function

2021-03-03T04:47:45+00:00

A hart can take interrupt in the new HSM states introduced by the SBI HSM suspend function (such as SUSPENDED state) so we rename sbi_hsm_hart_started_mask() to something more generic such as sbi_hsm_hart_interruptible_mask(). Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Use SBI_HSM_STATE_xyz defines instead of SBI_STATE_xyz defines

2021-03-03T04:47:41+00:00

We replace the use of SBI_STATE_xyz defines with SBI_HSM_STATE_xyz defines because the HSM state defines are complete enough to implement HSM state machine in OpenSBI. As a result of this, we can now remove sbi_hsm_hart_state_to_status() function because it is now redundant and sbi_hsm_hart_get_state() can directly return HSM state or error. Signed-off-by: Anup Patel Reviewed-by: Atish Patra