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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_INST_H
#define _ASM_POWERPC_INST_H
#include <asm/ppc-opcode.h>
/*
* Instruction data type for POWER
*/
struct ppc_inst {
u32 val;
#ifdef CONFIG_PPC64
u32 suffix;
#endif
} __packed;
static inline u32 ppc_inst_val(struct ppc_inst x)
{
return x.val;
}
static inline int ppc_inst_primary_opcode(struct ppc_inst x)
{
return ppc_inst_val(x) >> 26;
}
#ifdef CONFIG_PPC64
#define ppc_inst(x) ((struct ppc_inst){ .val = (x), .suffix = 0xff })
#define ppc_inst_prefix(x, y) ((struct ppc_inst){ .val = (x), .suffix = (y) })
static inline u32 ppc_inst_suffix(struct ppc_inst x)
{
return x.suffix;
}
static inline bool ppc_inst_prefixed(struct ppc_inst x)
{
return (ppc_inst_primary_opcode(x) == 1) && ppc_inst_suffix(x) != 0xff;
}
static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
{
return ppc_inst_prefix(swab32(ppc_inst_val(x)),
swab32(ppc_inst_suffix(x)));
}
static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr)
{
u32 val, suffix;
val = *(u32 *)ptr;
if ((val >> 26) == OP_PREFIX) {
suffix = *((u32 *)ptr + 1);
return ppc_inst_prefix(val, suffix);
} else {
return ppc_inst(val);
}
}
static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y)
{
return *(u64 *)&x == *(u64 *)&y;
}
#else
#define ppc_inst(x) ((struct ppc_inst){ .val = x })
static inline bool ppc_inst_prefixed(struct ppc_inst x)
{
return false;
}
static inline u32 ppc_inst_suffix(struct ppc_inst x)
{
return 0;
}
static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
{
return ppc_inst(swab32(ppc_inst_val(x)));
}
static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr)
{
return *ptr;
}
static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y)
{
return ppc_inst_val(x) == ppc_inst_val(y);
}
#endif /* CONFIG_PPC64 */
static inline int ppc_inst_len(struct ppc_inst x)
{
return ppc_inst_prefixed(x) ? 8 : 4;
}
/*
* Return the address of the next instruction, if the instruction @value was
* located at @location.
*/
static inline struct ppc_inst *ppc_inst_next(void *location, struct ppc_inst *value)
{
struct ppc_inst tmp;
tmp = ppc_inst_read(value);
return location + ppc_inst_len(tmp);
}
int probe_user_read_inst(struct ppc_inst *inst,
struct ppc_inst __user *nip);
int probe_kernel_read_inst(struct ppc_inst *inst,
struct ppc_inst *src);
#endif /* _ASM_POWERPC_INST_H */
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