arch/powerpc/include/asm/inst.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/inst.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/inst.h
Extension
.h
Size
3835 bytes
Lines
167
Domain
Architecture Layer
Bucket
arch/powerpc
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.

Dependency Surface

Detected Declarations

Annotated Snippet

if (IS_ENABLED(CONFIG_PPC64) && (__prefix >> 26) == OP_PREFIX) { \
			__gui_ret = gu_op(__suffix, __gui_ptr + 1);	\
			__gui_inst = ppc_inst_prefix(__prefix, __suffix); \
		} else {						\
			__gui_inst = ppc_inst(__prefix);		\
		}							\
		if (__gui_ret == 0)					\
			(dest) = __gui_inst;				\
	}								\
	__gui_ret;							\
})

#define get_user_instr(x, ptr) ___get_user_instr(get_user, x, ptr)

#define __get_user_instr(x, ptr) ___get_user_instr(__get_user, x, ptr)

/*
 * Instruction data type for POWER
 */

#if defined(CONFIG_PPC64) || defined(__CHECKER__)
static inline u32 ppc_inst_val(ppc_inst_t x)
{
	return x.val;
}

#define ppc_inst(x) ((ppc_inst_t){ .val = (x) })

#else
static inline u32 ppc_inst_val(ppc_inst_t x)
{
	return x;
}
#define ppc_inst(x) (x)
#endif

static inline int ppc_inst_primary_opcode(ppc_inst_t x)
{
	return ppc_inst_val(x) >> 26;
}

#ifdef CONFIG_PPC64
#define ppc_inst_prefix(x, y) ((ppc_inst_t){ .val = (x), .suffix = (y) })

static inline u32 ppc_inst_suffix(ppc_inst_t x)
{
	return x.suffix;
}

#else
#define ppc_inst_prefix(x, y) ((void)y, ppc_inst(x))

static inline u32 ppc_inst_suffix(ppc_inst_t x)
{
	return 0;
}

#endif /* CONFIG_PPC64 */

static inline ppc_inst_t ppc_inst_read(const u32 *ptr)
{
	if (IS_ENABLED(CONFIG_PPC64) && (*ptr >> 26) == OP_PREFIX)
		return ppc_inst_prefix(*ptr, *(ptr + 1));
	else
		return ppc_inst(*ptr);
}

static inline bool ppc_inst_prefixed(ppc_inst_t x)
{
	return IS_ENABLED(CONFIG_PPC64) && ppc_inst_primary_opcode(x) == OP_PREFIX;
}

static inline ppc_inst_t ppc_inst_swab(ppc_inst_t x)
{
	return ppc_inst_prefix(swab32(ppc_inst_val(x)), swab32(ppc_inst_suffix(x)));
}

static inline bool ppc_inst_equal(ppc_inst_t x, ppc_inst_t y)
{
	if (ppc_inst_val(x) != ppc_inst_val(y))
		return false;
	if (!ppc_inst_prefixed(x))
		return true;
	return ppc_inst_suffix(x) == ppc_inst_suffix(y);
}

static inline int ppc_inst_len(ppc_inst_t x)
{
	return ppc_inst_prefixed(x) ? 8 : 4;
}

Annotation

Implementation Notes