/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BPF_JIT_H
#define _BPF_JIT_H

/* Conventions:
 *  %g1 : temporary
 *  %g2 : Secondary temporary used by SKB data helper stubs.
 *  %g3 : packet offset passed into SKB data helper stubs.
 *  %o0 : pointer to skb (first argument given to JIT function)
 *  %o1 : BPF A accumulator
 *  %o2 : BPF X accumulator
 *  %o3 : Holds saved %o7 so we can call helper functions without needing
 *        to allocate a register window.
 *  %o4 : skb->len - skb->data_len
 *  %o5 : skb->data
 */

#ifndef __ASSEMBLER__
#define G0              0x00
#define G1              0x01
#define G3              0x03
#define G6              0x06
#define O0              0x08
#define O1              0x09
#define O2              0x0a
#define O3              0x0b
#define O4              0x0c
#define O5              0x0d
#define SP              0x0e
#define O7              0x0f
#define FP              0x1e

#define r_SKB           O0
#define r_A             O1
#define r_X             O2
#define r_saved_O7      O3
#define r_HEADLEN       O4
#define r_SKB_DATA      O5
#define r_TMP           G1
#define r_TMP2          G2
#define r_OFF           G3

/* assembly code in arch/sparc/net/bpf_jit_asm_32.S */
extern u32 bpf_jit_load_word[];
extern u32 bpf_jit_load_half[];
extern u32 bpf_jit_load_byte[];
extern u32 bpf_jit_load_byte_msh[];
extern u32 bpf_jit_load_word_positive_offset[];
extern u32 bpf_jit_load_half_positive_offset[];
extern u32 bpf_jit_load_byte_positive_offset[];
extern u32 bpf_jit_load_byte_msh_positive_offset[];
extern u32 bpf_jit_load_word_negative_offset[];
extern u32 bpf_jit_load_half_negative_offset[];
extern u32 bpf_jit_load_byte_negative_offset[];
extern u32 bpf_jit_load_byte_msh_negative_offset[];

#else
#define r_SKB           %o0
#define r_A             %o1
#define r_X             %o2
#define r_saved_O7      %o3
#define r_HEADLEN       %o4
#define r_SKB_DATA      %o5
#define r_TMP           %g1
#define r_TMP2          %g2
#define r_OFF           %g3
#endif

#endif /* _BPF_JIT_H */