/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_RISCV_VENDOR_EXTENSIONS_THEAD_H #define _ASM_RISCV_VENDOR_EXTENSIONS_THEAD_H #include <asm/vendor_extensions.h> #include <linux/types.h> /* * Extension keys must be strictly less than RISCV_ISA_VENDOR_EXT_MAX. */ #define RISCV_ISA_VENDOR_EXT_XTHEADVECTOR 0 extern struct riscv_isa_vendor_ext_data_list riscv_isa_vendor_ext_list_thead; #ifdef CONFIG_RISCV_ISA_VENDOR_EXT_THEAD void disable_xtheadvector(void); #else static inline void disable_xtheadvector(void) { } #endif /* Extension specific helpers */ /* * Vector 0.7.1 as used for example on T-Head Xuantie cores, uses an older * encoding for vsetvli (ta, ma vs. d1), so provide an instruction for * vsetvli t4, x0, e8, m8, d1 */ #define THEAD_VSETVLI_T4X0E8M8D1 ".long 0x00307ed7\n\t" /* * While in theory, the vector-0.7.1 vsb.v and vlb.v result in the same * encoding as the standard vse8.v and vle8.v, compilers seem to optimize * the call resulting in a different encoding and then using a value for * the "mop" field that is not part of vector-0.7.1 * So encode specific variants for vstate_save and _restore. */ #define THEAD_VSB_V_V0T0 ".long 0x02028027\n\t" #define THEAD_VSB_V_V8T0 ".long 0x02028427\n\t" #define THEAD_VSB_V_V16T0 ".long 0x02028827\n\t" #define THEAD_VSB_V_V24T0 ".long 0x02028c27\n\t" #define THEAD_VLB_V_V0T0 ".long 0x012028007\n\t" #define THEAD_VLB_V_V8T0 ".long 0x012028407\n\t" #define THEAD_VLB_V_V16T0 ".long 0x012028807\n\t" #define THEAD_VLB_V_V24T0 ".long 0x012028c07\n\t" #endif