1#ifndef _BPF_JIT_H
2#define _BPF_JIT_H
3
4/* Conventions:
5 *  %g1 : temporary
6 *  %g2 : Secondary temporary used by SKB data helper stubs.
7 *  %g3 : packet offset passed into SKB data helper stubs.
8 *  %o0 : pointer to skb (first argument given to JIT function)
9 *  %o1 : BPF A accumulator
10 *  %o2 : BPF X accumulator
11 *  %o3 : Holds saved %o7 so we can call helper functions without needing
12 *        to allocate a register window.
13 *  %o4 : skb->len - skb->data_len
14 *  %o5 : skb->data
15 */
16
17#ifndef __ASSEMBLER__
18#define G0		0x00
19#define G1		0x01
20#define G3		0x03
21#define G6		0x06
22#define O0		0x08
23#define O1		0x09
24#define O2		0x0a
25#define O3		0x0b
26#define O4		0x0c
27#define O5		0x0d
28#define SP		0x0e
29#define O7		0x0f
30#define FP		0x1e
31
32#define r_SKB		O0
33#define r_A		O1
34#define r_X		O2
35#define r_saved_O7	O3
36#define r_HEADLEN	O4
37#define r_SKB_DATA	O5
38#define r_TMP		G1
39#define r_TMP2		G2
40#define r_OFF		G3
41
42/* assembly code in arch/sparc/net/bpf_jit_asm.S */
43extern u32 bpf_jit_load_word[];
44extern u32 bpf_jit_load_half[];
45extern u32 bpf_jit_load_byte[];
46extern u32 bpf_jit_load_byte_msh[];
47extern u32 bpf_jit_load_word_positive_offset[];
48extern u32 bpf_jit_load_half_positive_offset[];
49extern u32 bpf_jit_load_byte_positive_offset[];
50extern u32 bpf_jit_load_byte_msh_positive_offset[];
51extern u32 bpf_jit_load_word_negative_offset[];
52extern u32 bpf_jit_load_half_negative_offset[];
53extern u32 bpf_jit_load_byte_negative_offset[];
54extern u32 bpf_jit_load_byte_msh_negative_offset[];
55
56#else
57#define r_SKB		%o0
58#define r_A		%o1
59#define r_X		%o2
60#define r_saved_O7	%o3
61#define r_HEADLEN	%o4
62#define r_SKB_DATA	%o5
63#define r_TMP		%g1
64#define r_TMP2		%g2
65#define r_OFF		%g3
66#endif
67
68#endif /* _BPF_JIT_H */
69