starfive-tech/opensbi.git/lib/sbi/sbi_trap.c, branch debug

lib: sbi: Introduce sbi_trap_exit() API

2021-01-07T04:23:17+00:00

We introduce sbi_trap_exit() API which can help non-firmware (i.e. generic or platform) code to force exit trap/interrupt handling and resume execution at context pointed by parameter "const struct sbi_trap_regs *regs". This new sbi_trap_exit() API will help Keystone Enclave project to resume execution of enclave from custom SBI call handler. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi_trap: Allow M-mode to M-mode ECALLs

2020-09-09T04:02:04+00:00

We should allow M-mode to M-mode ECALLs because: 1. No other mode can handle M-mode ECALLs 2. In future, we can allow M-mode baremetal application (not linked to OpenSBI) running independently and cooperatively without corrupting OpenSBI M-mode state (CSRs and memory). Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: Rename ECALL defines to match latest RISC-V spec

2020-09-09T04:02:02+00:00

We rename CAUSE_HYPERVISOR_ECALL to CAUSE_SUPERVISOR_ECALL and CAUSE_SUPERVISOR_ECALL to CAUSE_VIRTUAL_SUPERVISOR_ECALL so that it matches latest RISC-V privilege spec. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi: Don't handle VS-mode ecall in sbi_trap_handler()

2020-09-09T04:02:00+00:00

The VS-mode ecall is supposed to be handled by HS-mode so sbi_trap_handler() should fallback to default case for VS-mode ecall trap. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi_trap: Fix hstatus.SPVP update in sbi_trap_redirect()

2020-08-17T12:47:42+00:00

When redirecting from VS/VU-mode to HS-mode, hstatus.SPVP was set to the value of mstatus.SPP, as according to the specification both flags should be set to the same value. However, the assignment of SPVP takes place before SPP itself is updated, which results in SPVP having an outdated value. Signed-off-by: Georg Kotheimer Reviewed-by: Anup Patel

lib: Add RISC-V hypervisor v0.6.1 support

2020-06-08T10:11:23+00:00

To support RISC-V hypervisor v0.6.1, we: 1. Don't need to explicitly forward WFI traps from VS/VU-mode 2. Have to delegate virtual instruction trap to HS-mode 3. Have to update trap redirection for changes in HSTATUS CSR Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi_timer: Remove scratch parameter from most funcitons

2020-03-28T08:02:55+00:00

This patch removes scratch parameter from most sbi_timer functions. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

include: sbi_ipi: Remove scratch parameter from most functions

2020-03-28T08:02:47+00:00

This patch removes scratch parameter from most sbi_ipi functions. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi_trap: Simplify sbi_trap_handler() API

2020-03-28T08:02:23+00:00

This patch simplify sbi_trap_handler() API as follows: 1. Remove current hartid local variable because sbi_trap_handler() itself does not need it. 2. Remove scratch parameter because none of the functions directly called by sbi_trap_handler() require it. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: sbi_ecall: Remove mcause, scratch and hartid parameters

2020-03-28T08:02:20+00:00

We remove mcause, scratch and hartid parameters from various functions for ecall handling because we can always get current HART id and current scratch pointer using just one CSR access. Signed-off-by: Anup Patel Reviewed-by: Atish Patra