opensbi.git/include/sbi/sbi_trap.h, branch v1.2

lib: sbi_trap: Add helper to get GVA in sbi_trap_regs

2022-09-13T11:12:59Z

The GVA bit is in mstatus on RV64, and in mstatush in RV32. Refactor code handling this in sbi_trap_handler into a helper function to extract GVA from sbi_trap_regs, so that future code accessing GVA can be XLEN-agnostic. Signed-off-by: Vivian Wang Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi_trap: Save mstatus[h].GVA in trap->gva

2022-08-22T03:19:39Z

The machine mode GVA field is available if the hypervisor extension is implemented, and indicates if mtval is a guest virtual address. Add a gva field to sbi_trap_info for this, and in __sbi_expected_trap_hext, save mstatus[h].GVA to it, so that gva indicates if tval is a guest virtual address. If the hypervisor extension is not implemented, always set gva to 0. Signed-off-by: Vivian Wang Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

lib: sbi: Add a simple external interrupt handling framework

2022-02-28T04:13:12Z

Currently, the external interrupt handling is scattered between sbi_init and sbi_trap. This patch moves all external interrupt handling into a simple framework called sbi_irqchip. Signed-off-by: Anup Patel Reviewed-by: Xiang W Reviewed-by: Atish Patra

lib: sbi: Add sbi_trap_set_external_irqfn() API

2022-02-15T15:03:55Z

This patch adds sbi_trap_set_external_irqfn() API which can be used by OpenSBI platform code to set a callback function for external interrupts. The RISC-V AIA IMSIC driver will use this API to implement inter-processor interrupts on-top-of MSIs. Signed-off-by: Anup Patel Signed-off-by: Anup Patel Reviewed-by: Atish Patra

firware: optimize the exception exit code

2021-04-01T05:18:35Z

There are two copies of the same abnormal exit code, this patch deletes one Signed-off-by: Xiang W Reviewed-by: Anup Patel

include: headers: Replace ASSEMBLY with ASSEMBLER

2021-03-22T10:32:48Z

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

include: sbi: No need to pack struct sbi_trap_regs

2021-01-15T05:10:29Z

All members in struct sbi_trap_regs are of machine word size so no need to pack this structure. This also allows GCC to generate more optimized instruction sequence when accessing members of struct sbi_trap_regs. Reported-by: Paul Campbell Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Reviewed-by: Atish Patra

lib: sbi: Introduce sbi_trap_exit() API

2021-01-07T04:23:17Z

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: Simplify sbi_trap_handler() API

2020-03-28T08:02:23Z

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_trap: Remove scratch parameter from sbi_trap_redirect()

2020-03-28T08:02:04Z

The scratch parameter of sbi_trap_redirect() is not used hence we remove it. Signed-off-by: Anup Patel Reviewed-by: Atish Patra