opensbi.git/include/sbi/sbi_trap.h, branch v1.5

lib: sbi: Introduce trap context

2024-03-19T06:01:22Z

Club the struct sbi_trap_regs and struct sbi_trap_info a new struct sbi_trap_context (aka trap context) which must be saved by low-level trap handler before calling sbi_trap_handler(). To track nested traps, the struct sbi_scratch points to the current trap context and the trap context has pointer to pervious context of previous trap. 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 epc from struct sbi_trap_info

2024-03-19T06:01:16Z

In the only places this value is used, it duplicates mepc from struct sbi_trap_regs. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi: change prototype of sbi_trap_redirect

2024-03-11T05:06:39Z

sbi_trap_redirect now uses const pointer to `trap`. This ensures the caller that we never change `trap` in sbi_trap_redirect. Signed-off-by: Bo Gan Reviewed-by: Anup Patel

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