arch/riscv/include/asm/errata_list.h
Source file repositories/reference/linux-study-clean/arch/riscv/include/asm/errata_list.h
File Facts
- System
- Linux kernel
- Corpus path
arch/riscv/include/asm/errata_list.h- Extension
.h- Size
- 3806 bytes
- Lines
- 123
- Domain
- Architecture Layer
- Bucket
- arch/riscv
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
Dependency Surface
asm/csr.hasm/insn-def.hasm/hwcap.hasm/vendorid_list.hasm/errata_list_vendors.hasm/vendor_extensions/mips.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#ifndef ASM_ERRATA_LIST_H
#define ASM_ERRATA_LIST_H
#include <asm/csr.h>
#include <asm/insn-def.h>
#include <asm/hwcap.h>
#include <asm/vendorid_list.h>
#include <asm/errata_list_vendors.h>
#include <asm/vendor_extensions/mips.h>
#ifdef __ASSEMBLER__
#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 /* !__ASSEMBLER__ */
#define ALT_SFENCE_VMA_ASID(asid) \
asm(ALTERNATIVE("sfence.vma x0, %0", "sfence.vma", SIFIVE_VENDOR_ID, \
ERRATA_SIFIVE_CIP_1200, CONFIG_ERRATA_SIFIVE_CIP_1200) \
: : "r" (asid) : "memory")
#define ALT_SFENCE_VMA_ADDR(addr) \
asm(ALTERNATIVE("sfence.vma %0", "sfence.vma", SIFIVE_VENDOR_ID, \
ERRATA_SIFIVE_CIP_1200, CONFIG_ERRATA_SIFIVE_CIP_1200) \
: : "r" (addr) : "memory")
#define ALT_SFENCE_VMA_ADDR_ASID(addr, asid) \
asm(ALTERNATIVE("sfence.vma %0, %1", "sfence.vma", SIFIVE_VENDOR_ID, \
ERRATA_SIFIVE_CIP_1200, CONFIG_ERRATA_SIFIVE_CIP_1200) \
: : "r" (addr), "r" (asid) : "memory")
#define ALT_RISCV_PAUSE() \
asm(ALTERNATIVE( \
RISCV_PAUSE, /* Original RISC‑V pause insn */ \
MIPS_PAUSE, /* Replacement for MIPS P8700 */ \
MIPS_VENDOR_ID, /* Vendor ID to match */ \
ERRATA_MIPS_P8700_PAUSE_OPCODE, /* patch_id */ \
CONFIG_ERRATA_MIPS_P8700_PAUSE_OPCODE) \
: /* no outputs */ \
: /* no inputs */ \
: "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_MAE_SHIFT 59
#define ALT_SVPBMT(_val, prot) \
asm(ALTERNATIVE_2("li %0, 0\t\nnop", \
"li %0, %1\t\nslli %0,%0,%3", 0, \
RISCV_ISA_EXT_SVPBMT, CONFIG_RISCV_ISA_SVPBMT, \
"li %0, %2\t\nslli %0,%0,%4", THEAD_VENDOR_ID, \
ERRATA_THEAD_MAE, CONFIG_ERRATA_THEAD_MAE) \
: "=r"(_val) \
: "I"(prot##_SVPBMT >> ALT_SVPBMT_SHIFT), \
"I"(prot##_THEAD >> ALT_THEAD_MAE_SHIFT), \
"I"(ALT_SVPBMT_SHIFT), \
"I"(ALT_THEAD_MAE_SHIFT))
#ifdef CONFIG_ERRATA_THEAD_MAE
/*
* 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( \
__nops(7), \
"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_MAE, CONFIG_ERRATA_THEAD_MAE) \
: "+r"(_val) \
: "I"(_PAGE_MTMASK_THEAD >> ALT_THEAD_MAE_SHIFT), \
"I"(_PAGE_PMA_THEAD >> ALT_THEAD_MAE_SHIFT), \
Annotation
- Immediate include surface: `asm/csr.h`, `asm/insn-def.h`, `asm/hwcap.h`, `asm/vendorid_list.h`, `asm/errata_list_vendors.h`, `asm/vendor_extensions/mips.h`.
- Atlas domain: Architecture Layer / arch/riscv.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.