diff --git a/portable/GCC/RISC-V/portContext.h b/portable/GCC/RISC-V/portContext.h index 9309f6766..62aeedd75 100644 --- a/portable/GCC/RISC-V/portContext.h +++ b/portable/GCC/RISC-V/portContext.h @@ -97,6 +97,97 @@ .extern pxCriticalNesting /*-----------------------------------------------------------*/ + .macro portcontexSAVE_FPU_CONTEXT_INTERNAL +/* Check if the FPU has been used, if it has not, skip the context save */ +srl t1, t0, MSTATUS_FS_USED_OFFSET +andi t1, t1, 1 +beqz t1, 1f /* The FPU has not been used (FS either initial or clean), skip context save */ +/* Store the fp registers */ +store_f f0, portFPUREG_OFFSET(0)( sp ) +store_f f1, portFPUREG_OFFSET(1)( sp ) +store_f f2, portFPUREG_OFFSET(2)( sp ) +store_f f3, portFPUREG_OFFSET(3)( sp ) +store_f f4, portFPUREG_OFFSET(4)( sp ) +store_f f5, portFPUREG_OFFSET(5)( sp ) +store_f f6, portFPUREG_OFFSET(6)( sp ) +store_f f7, portFPUREG_OFFSET(7)( sp ) +store_f f8, portFPUREG_OFFSET(8)( sp ) +store_f f9, portFPUREG_OFFSET(9)( sp ) +store_f f10, portFPUREG_OFFSET(10)( sp ) +store_f f11, portFPUREG_OFFSET(11)( sp ) +store_f f12, portFPUREG_OFFSET(12)( sp ) +store_f f13, portFPUREG_OFFSET(13)( sp ) +store_f f14, portFPUREG_OFFSET(14)( sp ) +store_f f15, portFPUREG_OFFSET(15)( sp ) +store_f f16, portFPUREG_OFFSET(16)( sp ) +store_f f17, portFPUREG_OFFSET(17)( sp ) +store_f f18, portFPUREG_OFFSET(18)( sp ) +store_f f19, portFPUREG_OFFSET(19)( sp ) +store_f f20, portFPUREG_OFFSET(20)( sp ) +store_f f21, portFPUREG_OFFSET(21)( sp ) +store_f f22, portFPUREG_OFFSET(22)( sp ) +store_f f23, portFPUREG_OFFSET(23)( sp ) +store_f f24, portFPUREG_OFFSET(24)( sp ) +store_f f25, portFPUREG_OFFSET(25)( sp ) +store_f f26, portFPUREG_OFFSET(26)( sp ) +store_f f27, portFPUREG_OFFSET(27)( sp ) +store_f f28, portFPUREG_OFFSET(28)( sp ) +store_f f29, portFPUREG_OFFSET(29)( sp ) +store_f f30, portFPUREG_OFFSET(30)( sp ) +store_f f31, portFPUREG_OFFSET(31)( sp ) +csrr t0, fcsr +store_x t0, portFPUREG_OFFSET(32)( sp ) +/* Mark the FPU as clean */ +li t1, ~MSTATUS_FS_MASK +and t0, t0, t1 +li t1, MSTATUS_FS_CLEAN +or t0, t0, t1 +csrw mstatus, t0 +1: + .endm +/*-----------------------------------------------------------*/ + + .macro portasmRESTORE_FPU_CONTEXT_INTERNAL +/* Restore fp registers from context */ +load_f f0, portFPUREG_OFFSET(0)( sp ) +load_f f1, portFPUREG_OFFSET(0)( sp ) +load_f f1, portFPUREG_OFFSET(1)( sp ) +load_f f2, portFPUREG_OFFSET(2)( sp ) +load_f f3, portFPUREG_OFFSET(3)( sp ) +load_f f4, portFPUREG_OFFSET(4)( sp ) +load_f f5, portFPUREG_OFFSET(5)( sp ) +load_f f6, portFPUREG_OFFSET(6)( sp ) +load_f f7, portFPUREG_OFFSET(7)( sp ) +load_f f8, portFPUREG_OFFSET(8)( sp ) +load_f f9, portFPUREG_OFFSET(9)( sp ) +load_f f10, portFPUREG_OFFSET(10)( sp ) +load_f f11, portFPUREG_OFFSET(11)( sp ) +load_f f12, portFPUREG_OFFSET(12)( sp ) +load_f f13, portFPUREG_OFFSET(13)( sp ) +load_f f14, portFPUREG_OFFSET(14)( sp ) +load_f f15, portFPUREG_OFFSET(15)( sp ) +load_f f16, portFPUREG_OFFSET(16)( sp ) +load_f f17, portFPUREG_OFFSET(17)( sp ) +load_f f18, portFPUREG_OFFSET(18)( sp ) +load_f f19, portFPUREG_OFFSET(19)( sp ) +load_f f20, portFPUREG_OFFSET(20)( sp ) +load_f f21, portFPUREG_OFFSET(21)( sp ) +load_f f22, portFPUREG_OFFSET(22)( sp ) +load_f f23, portFPUREG_OFFSET(23)( sp ) +load_f f24, portFPUREG_OFFSET(24)( sp ) +load_f f25, portFPUREG_OFFSET(25)( sp ) +load_f f26, portFPUREG_OFFSET(26)( sp ) +load_f f27, portFPUREG_OFFSET(27)( sp ) +load_f f28, portFPUREG_OFFSET(28)( sp ) +load_f f29, portFPUREG_OFFSET(29)( sp ) +load_f f30, portFPUREG_OFFSET(30)( sp ) +load_f f31, portFPUREG_OFFSET(31)( sp ) +load_x t0, portFPUREG_OFFSET(32)( sp ) +csrw fcsr, t0 +1: + .endm +/*-----------------------------------------------------------*/ + .macro portcontextSAVE_CONTEXT_INTERNAL addi sp, sp, -portCONTEXT_SIZE store_x x1, 1 * portWORD_SIZE( sp ) @@ -136,6 +227,9 @@ store_x t0, portCRITICAL_NESTING_OFFSET * portWORD_SIZE( sp ) /* Store the criti csrr t0, mstatus /* Required for MPIE bit. */ store_x t0, portMSTATUS_OFFSET * portWORD_SIZE( sp ) +#ifdef portasmSTORE_FPU_CONTEXT +portcontexSAVE_FPU_CONTEXT_INTERNAL +#endif /* ifdef portasmSTORE_FPU_CONTEXT */ portasmSAVE_ADDITIONAL_REGISTERS /* Defined in freertos_risc_v_chip_specific_extensions.h to save any registers unique to the RISC-V implementation. */ @@ -176,6 +270,10 @@ csrw mepc, t0 /* Defined in freertos_risc_v_chip_specific_extensions.h to restore any registers unique to the RISC-V implementation. */ portasmRESTORE_ADDITIONAL_REGISTERS +#ifdef portasmSTORE_FPU_CONTEXT + portasmRESTORE_FPU_CONTEXT_INTERNAL +#endif /* ifdef portasmSTORE_FPU_CONTEXT */ + /* Load mstatus with the interrupt enable bits used by the task. */ load_x t0, portMSTATUS_OFFSET * portWORD_SIZE( sp ) csrw mstatus, t0 /* Required for MPIE bit. */