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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2021 Sifive.
*/
#ifndef ASM_ERRATA_LIST_H
#define ASM_ERRATA_LIST_H
#include <asm/alternative.h>
#include <asm/vendorid_list.h>
#ifdef CONFIG_ERRATA_SIFIVE
#define ERRATA_SIFIVE_CIP_453 0
#define ERRATA_SIFIVE_CIP_1200 1
#define ERRATA_SIFIVE_NUMBER 2
#endif
#ifdef CONFIG_ERRATA_THEAD
#define ERRATA_THEAD_PBMT 0
#define ERRATA_THEAD_NUMBER 1
#endif
#define CPUFEATURE_SVPBMT 0
#define CPUFEATURE_NUMBER 1
#ifdef __ASSEMBLY__
#define ALT_INSN_FAULT(x) \
ALTERNATIVE(__stringify(RISCV_PTR do_trap_insn_fault), \
__stringify(RISCV_PTR sifive_cip_453_insn_fault_trp), \
SIFIVE_VENDOR_ID, ERRATA_SIFIVE_CIP_453, \
CONFIG_ERRATA_SIFIVE_CIP_453)
#define ALT_PAGE_FAULT(x) \
ALTERNATIVE(__stringify(RISCV_PTR do_page_fault), \
__stringify(RISCV_PTR sifive_cip_453_page_fault_trp), \
SIFIVE_VENDOR_ID, ERRATA_SIFIVE_CIP_453, \
CONFIG_ERRATA_SIFIVE_CIP_453)
#else /* !__ASSEMBLY__ */
#define ALT_FLUSH_TLB_PAGE(x) \
asm(ALTERNATIVE("sfence.vma %0", "sfence.vma", SIFIVE_VENDOR_ID, \
ERRATA_SIFIVE_CIP_1200, CONFIG_ERRATA_SIFIVE_CIP_1200) \
: : "r" (addr) : "memory")
/*
* _val is marked as "will be overwritten", so need to set it to 0
* in the default case.
*/
#define ALT_SVPBMT_SHIFT 61
#define ALT_THEAD_PBMT_SHIFT 59
#define ALT_SVPBMT(_val, prot) \
asm(ALTERNATIVE_2("li %0, 0\t\nnop", \
"li %0, %1\t\nslli %0,%0,%3", 0, \
CPUFEATURE_SVPBMT, CONFIG_RISCV_ISA_SVPBMT, \
"li %0, %2\t\nslli %0,%0,%4", THEAD_VENDOR_ID, \
ERRATA_THEAD_PBMT, CONFIG_ERRATA_THEAD_PBMT) \
: "=r"(_val) \
: "I"(prot##_SVPBMT >> ALT_SVPBMT_SHIFT), \
"I"(prot##_THEAD >> ALT_THEAD_PBMT_SHIFT), \
"I"(ALT_SVPBMT_SHIFT), \
"I"(ALT_THEAD_PBMT_SHIFT))
#ifdef CONFIG_ERRATA_THEAD_PBMT
/*
* IO/NOCACHE memory types are handled together with svpbmt,
* so on T-Head chips, check if no other memory type is set,
* and set the non-0 PMA type if applicable.
*/
#define ALT_THEAD_PMA(_val) \
asm volatile(ALTERNATIVE( \
"nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop\n\t" \
"nop", \
"li t3, %1\n\t" \
"slli t3, t3, %3\n\t" \
"and t3, %0, t3\n\t" \
"bne t3, zero, 2f\n\t" \
"li t3, %2\n\t" \
"slli t3, t3, %3\n\t" \
"or %0, %0, t3\n\t" \
"2:", THEAD_VENDOR_ID, \
ERRATA_THEAD_PBMT, CONFIG_ERRATA_THEAD_PBMT) \
: "+r"(_val) \
: "I"(_PAGE_MTMASK_THEAD >> ALT_THEAD_PBMT_SHIFT), \
"I"(_PAGE_PMA_THEAD >> ALT_THEAD_PBMT_SHIFT), \
"I"(ALT_THEAD_PBMT_SHIFT) \
: "t3")
#else
#define ALT_THEAD_PMA(_val)
#endif
#endif /* __ASSEMBLY__ */
#endif
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