arch/riscv/errata/sifive/errata_cip_453.S

Source file repositories/reference/linux-study-clean/arch/riscv/errata/sifive/errata_cip_453.S

File Facts

System
Linux kernel
Corpus path
arch/riscv/errata/sifive/errata_cip_453.S
Extension
.S
Size
835 bytes
Lines
39
Domain
Architecture Layer
Bucket
arch/riscv
Inferred role
Architecture Layer: arch/riscv
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/linkage.h>
#include <asm/asm.h>
#include <asm/asm-offsets.h>
#include <asm/alternative.h>

.macro ADD_SIGN_EXT pt_reg badaddr tmp_reg
	REG_L \badaddr, PT_BADADDR(\pt_reg)
	li \tmp_reg,1
	slli \tmp_reg,\tmp_reg,0x26
	and \tmp_reg,\tmp_reg,\badaddr
	beqz \tmp_reg, 1f
	li \tmp_reg,-1
	slli \tmp_reg,\tmp_reg,0x27
	or \badaddr,\tmp_reg,\badaddr
	REG_S \badaddr, PT_BADADDR(\pt_reg)
1:
.endm

SYM_FUNC_START(sifive_cip_453_page_fault_trp)
	ADD_SIGN_EXT a0, t0, t1
#ifdef CONFIG_MMU
	la t0, do_page_fault
#else
	la t0, do_trap_unknown
#endif
	jr t0
SYM_FUNC_END(sifive_cip_453_page_fault_trp)

SYM_FUNC_START(sifive_cip_453_insn_fault_trp)
	ADD_SIGN_EXT a0, t0, t1
	la t0, do_trap_insn_fault
	jr t0
SYM_FUNC_END(sifive_cip_453_insn_fault_trp)

Annotation

Implementation Notes