WebThe cpu_resume() function is very similar for the suspend to disk and suspend to ram cases. Factor out the common code into suspend_restore_csrs WebJun 7, 2024 · The csrw instruction will write to the register, and the assembler can recognize mtvec and encode it to register number 0x0305. ... // Global interrupt enable riscv::csrs.mstatus.mie.set(); Conclusion. So were we able to do this in pure C++? Yes (with a touch of inline assembly). In fact, using C++ has opened up programmable compile …
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WebJan 23, 2024 · Hi, I’m currently using the RISC-V port of FreeRTOS and I’ve run into an issue in the xPortStartFirstTask function of portASM.S. Interrupts are supposed to be enabled by restoring the mstatus value saved in the task’s stack with: load_x t0, 29 * portWORD_SIZE( sp ) /* mstatus */ csrrw x0, mstatus, t0 /* Interrupts enabled from … WebE.g .macro initTrap entry, status, enable la t0, entry csrw mtvec, t0 csrwi mstatus, st... Stack Overflow. About; Products ... status, enable la t0, \entry csrw mtvec, t0 csrwi mstatus, \status csrwi mie, \enable .endm Share. Improve this answer. Follow answered Feb 22, 2024 at 18:11. user3552845 user3552845. 57 6 6 bronze badges. soldiers eating mres
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Webmstatus: The low 12 bits of this register store a 4-element stack of privilege/user mode (PRV) and interrupt enable (IE) bits. Each stack element is 3 bits wide. For example, mstatus[2:0] corresponds to the top of the stack, and contains the current PRV and IE bits. Specifically, mstatus[0] is the IE bit, and interrupts are enabled if IE = 1. Webadded to the mstatus CSR, and the eld previously called Base in misa has been renamed to MXL for consistency. Clari ed expected use of XS to summarize additional extension state status elds in mstatus. Optional vectored interrupt support has been added to the mtvec and stvec CSRs. The SEIP and UEIP bits in the mip CSR have been rede ned to ... WebJun 14, 2024 · csrr t1, mstatus srli t0, t1, 13 andi t0, t0, 3 li t3, 3 bne t0, t3, 1f .set i, 0 .rept 32 save_fp %i, t5 .set i, i+1 .endr 1: Above, we read the mstatus register, shift it right 13 places and mask it with 3, which is binary 11. This means we isolate the FS bits (2 bits) so we can read what the value is. smabtp cotisation