/* * Copyright (c) 2006-2024, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2022-10-10 RT-Thread the first version, * compatible to riscv-v-spec-1.0 */ #ifndef __EXT_CONTEXT_H__ #define __EXT_CONTEXT_H__ #ifdef __ASSEMBLY__ /** * extension context maintenance */ #include "cpuport.h" #include "encoding.h" #include "vector_encoding.h" /** * ================================== * FPU EXTENSION * ================================== */ #ifdef ENABLE_FPU #define FPU_CTX_F0_OFF REGBYTES * 0 /* offsetof(fpu_context_t, fpustatus.f[0]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F1_OFF REGBYTES * 1 /* offsetof(fpu_context_t, fpustatus.f[1]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F2_OFF REGBYTES * 2 /* offsetof(fpu_context_t, fpustatus.f[2]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F3_OFF REGBYTES * 3 /* offsetof(fpu_context_t, fpustatus.f[3]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F4_OFF REGBYTES * 4 /* offsetof(fpu_context_t, fpustatus.f[4]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F5_OFF REGBYTES * 5 /* offsetof(fpu_context_t, fpustatus.f[5]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F6_OFF REGBYTES * 6 /* offsetof(fpu_context_t, fpustatus.f[6]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F7_OFF REGBYTES * 7 /* offsetof(fpu_context_t, fpustatus.f[7]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F8_OFF REGBYTES * 8 /* offsetof(fpu_context_t, fpustatus.f[8]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F9_OFF REGBYTES * 9 /* offsetof(fpu_context_t, fpustatus.f[9]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F10_OFF REGBYTES * 10 /* offsetof(fpu_context_t, fpustatus.f[10]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F11_OFF REGBYTES * 11 /* offsetof(fpu_context_t, fpustatus.f[11]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F12_OFF REGBYTES * 12 /* offsetof(fpu_context_t, fpustatus.f[12]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F13_OFF REGBYTES * 13 /* offsetof(fpu_context_t, fpustatus.f[13]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F14_OFF REGBYTES * 14 /* offsetof(fpu_context_t, fpustatus.f[14]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F15_OFF REGBYTES * 15 /* offsetof(fpu_context_t, fpustatus.f[15]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F16_OFF REGBYTES * 16 /* offsetof(fpu_context_t, fpustatus.f[16]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F17_OFF REGBYTES * 17 /* offsetof(fpu_context_t, fpustatus.f[17]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F18_OFF REGBYTES * 18 /* offsetof(fpu_context_t, fpustatus.f[18]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F19_OFF REGBYTES * 19 /* offsetof(fpu_context_t, fpustatus.f[19]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F20_OFF REGBYTES * 20 /* offsetof(fpu_context_t, fpustatus.f[20]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F21_OFF REGBYTES * 21 /* offsetof(fpu_context_t, fpustatus.f[21]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F22_OFF REGBYTES * 22 /* offsetof(fpu_context_t, fpustatus.f[22]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F23_OFF REGBYTES * 23 /* offsetof(fpu_context_t, fpustatus.f[23]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F24_OFF REGBYTES * 24 /* offsetof(fpu_context_t, fpustatus.f[24]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F25_OFF REGBYTES * 25 /* offsetof(fpu_context_t, fpustatus.f[25]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F26_OFF REGBYTES * 26 /* offsetof(fpu_context_t, fpustatus.f[26]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F27_OFF REGBYTES * 27 /* offsetof(fpu_context_t, fpustatus.f[27]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F28_OFF REGBYTES * 28 /* offsetof(fpu_context_t, fpustatus.f[28]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F29_OFF REGBYTES * 29 /* offsetof(fpu_context_t, fpustatus.f[29]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F30_OFF REGBYTES * 30 /* offsetof(fpu_context_t, fpustatus.f[30]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #define FPU_CTX_F31_OFF REGBYTES * 31 /* offsetof(fpu_context_t, fpustatus.f[31]) - offsetof(fpu_context_t, fpustatus.f[0]) */ #endif /* ENABLE_FPU */ /** * ================================== * VECTOR EXTENSION * ================================== */ #ifdef ENABLE_VECTOR #define VEC_FRAME_VSTART (0 * REGBYTES) #define VEC_FRAME_VTYPE (1 * REGBYTES) #define VEC_FRAME_VL (2 * REGBYTES) #define VEC_FRAME_VCSR (3 * REGBYTES) #define VEC_FRAME_V0 (4 * REGBYTES) .macro GET_VEC_FRAME_LEN, xreg csrr \xreg, vlenb slli \xreg, \xreg, 5 addi \xreg, \xreg, 4 * REGBYTES .endm /** * @brief save vector extension hardware state * * @param dst register storing bottom of storage block * */ .macro SAVE_VECTOR, dst mv t1, \dst csrr t0, vstart STORE t0, VEC_FRAME_VSTART(t1) csrr t0, vtype STORE t0, VEC_FRAME_VTYPE(t1) csrr t0, vl STORE t0, VEC_FRAME_VL(t1) csrr t0, vcsr STORE t0, VEC_FRAME_VCSR(t1) addi t1, t1, VEC_FRAME_V0 // config vector setting, // t2 is updated to length of a vector group in bytes VEC_CONFIG_SETVLI(t2, x0, VEC_IMM_SEW_8, VEC_IMM_LMUL_8) vse8.v v0, (t1) add t1, t1, t2 vse8.v v8, (t1) add t1, t1, t2 vse8.v v16, (t1) add t1, t1, t2 vse8.v v24, (t1) .endm /** * @brief restore vector extension hardware states * * @param dst register storing bottom of storage block * */ .macro RESTORE_VECTOR, dst // restore vector registers first since it will modify vector states mv t0, \dst addi t1, t0, VEC_FRAME_V0 VEC_CONFIG_SETVLI(t2, x0, VEC_IMM_SEW_8, VEC_IMM_LMUL_8) vle8.v v0, (t1) add t1, t1, t2 vle8.v v8, (t1) add t1, t1, t2 vle8.v v16, (t1) add t1, t1, t2 vle8.v v24, (t1) mv t1, t0 LOAD t0, VEC_FRAME_VSTART(t1) csrw vstart, t0 LOAD t0, VEC_FRAME_VCSR(t1) csrw vcsr, t0 LOAD t0, VEC_FRAME_VTYPE(t1) LOAD t3, VEC_FRAME_VL(t1) VEC_CONFIG_SET_VL_VTYPE(t3, t0) .endm #endif /* ENABLE_VECTOR */ #endif /* __ASSEMBLY__ */ #endif /* __EXT_CONTEXT_H__ */