1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2021 Sifive. 4 */ 5 #ifndef ASM_ERRATA_LIST_H 6 #define ASM_ERRATA_LIST_H 7 8 #include <asm/alternative.h> 9 #include <asm/vendorid_list.h> 10 11 #ifdef CONFIG_ERRATA_SIFIVE 12 #define ERRATA_SIFIVE_CIP_453 0 13 #define ERRATA_SIFIVE_CIP_1200 1 14 #define ERRATA_SIFIVE_NUMBER 2 15 #endif 16 17 #ifdef CONFIG_ERRATA_THEAD 18 #define ERRATA_THEAD_PBMT 0 19 #define ERRATA_THEAD_NUMBER 1 20 #endif 21 22 #define CPUFEATURE_SVPBMT 0 23 #define CPUFEATURE_NUMBER 1 24 25 #ifdef __ASSEMBLY__ 26 27 #define ALT_INSN_FAULT(x) \ 28 ALTERNATIVE(__stringify(RISCV_PTR do_trap_insn_fault), \ 29 __stringify(RISCV_PTR sifive_cip_453_insn_fault_trp), \ 30 SIFIVE_VENDOR_ID, ERRATA_SIFIVE_CIP_453, \ 31 CONFIG_ERRATA_SIFIVE_CIP_453) 32 33 #define ALT_PAGE_FAULT(x) \ 34 ALTERNATIVE(__stringify(RISCV_PTR do_page_fault), \ 35 __stringify(RISCV_PTR sifive_cip_453_page_fault_trp), \ 36 SIFIVE_VENDOR_ID, ERRATA_SIFIVE_CIP_453, \ 37 CONFIG_ERRATA_SIFIVE_CIP_453) 38 #else /* !__ASSEMBLY__ */ 39 40 #define ALT_FLUSH_TLB_PAGE(x) \ 41 asm(ALTERNATIVE("sfence.vma %0", "sfence.vma", SIFIVE_VENDOR_ID, \ 42 ERRATA_SIFIVE_CIP_1200, CONFIG_ERRATA_SIFIVE_CIP_1200) \ 43 : : "r" (addr) : "memory") 44 45 /* 46 * _val is marked as "will be overwritten", so need to set it to 0 47 * in the default case. 48 */ 49 #define ALT_SVPBMT_SHIFT 61 50 #define ALT_THEAD_PBMT_SHIFT 59 51 #define ALT_SVPBMT(_val, prot) \ 52 asm(ALTERNATIVE_2("li %0, 0\t\nnop", \ 53 "li %0, %1\t\nslli %0,%0,%3", 0, \ 54 CPUFEATURE_SVPBMT, CONFIG_RISCV_ISA_SVPBMT, \ 55 "li %0, %2\t\nslli %0,%0,%4", THEAD_VENDOR_ID, \ 56 ERRATA_THEAD_PBMT, CONFIG_ERRATA_THEAD_PBMT) \ 57 : "=r"(_val) \ 58 : "I"(prot##_SVPBMT >> ALT_SVPBMT_SHIFT), \ 59 "I"(prot##_THEAD >> ALT_THEAD_PBMT_SHIFT), \ 60 "I"(ALT_SVPBMT_SHIFT), \ 61 "I"(ALT_THEAD_PBMT_SHIFT)) 62 63 #ifdef CONFIG_ERRATA_THEAD_PBMT 64 /* 65 * IO/NOCACHE memory types are handled together with svpbmt, 66 * so on T-Head chips, check if no other memory type is set, 67 * and set the non-0 PMA type if applicable. 68 */ 69 #define ALT_THEAD_PMA(_val) \ 70 asm volatile(ALTERNATIVE( \ 71 "nop\n\t" \ 72 "nop\n\t" \ 73 "nop\n\t" \ 74 "nop\n\t" \ 75 "nop\n\t" \ 76 "nop\n\t" \ 77 "nop", \ 78 "li t3, %1\n\t" \ 79 "slli t3, t3, %3\n\t" \ 80 "and t3, %0, t3\n\t" \ 81 "bne t3, zero, 2f\n\t" \ 82 "li t3, %2\n\t" \ 83 "slli t3, t3, %3\n\t" \ 84 "or %0, %0, t3\n\t" \ 85 "2:", THEAD_VENDOR_ID, \ 86 ERRATA_THEAD_PBMT, CONFIG_ERRATA_THEAD_PBMT) \ 87 : "+r"(_val) \ 88 : "I"(_PAGE_MTMASK_THEAD >> ALT_THEAD_PBMT_SHIFT), \ 89 "I"(_PAGE_PMA_THEAD >> ALT_THEAD_PBMT_SHIFT), \ 90 "I"(ALT_THEAD_PBMT_SHIFT) \ 91 : "t3") 92 #else 93 #define ALT_THEAD_PMA(_val) 94 #endif 95 96 #endif /* __ASSEMBLY__ */ 97 98 #endif 99