net: filter: Just In Time compiler for sparc

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 52 insertions, 0 deletions

diff --git a/arch/sparc/net/bpf_jit.h b/arch/sparc/net/bpf_jit.h
new file mode 100644
index 000000000000..74f048be739c
--- /dev/null
+++ b/arch/sparc/net/bpf_jit.h
@@ -0,0 +1,52 @@
+#ifndef _BPF_JIT_H
+#define _BPF_JIT_H
+
+/* Conventions:
+ *  %g1 : temporary
+ *  %g2 : Secondary temporary used by 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->data
+ *  %o5 : skb->len - skb->data_len
+ */
+
+#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
+#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 */