MIPS: Add LDX and LWX instructions to uasm.

Needed by Octeon II optimized TLB handlers.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Pachwork: https://patchwork.linux-mips.org/patch/1903/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 18 insertions, 0 deletions

diff --git a/arch/mips/include/asm/inst.h b/arch/mips/include/asm/inst.h
index 444ff71aa0e8..7ebfc392e58d 100644
--- a/arch/mips/include/asm/inst.h
+++ b/arch/mips/include/asm/inst.h
@@ -72,6 +72,7 @@ enum spec2_op {
 enum spec3_op {
         ext_op, dextm_op, dextu_op, dext_op,
         ins_op, dinsm_op, dinsu_op, dins_op,
+        lx_op = 0x0a,
         bshfl_op = 0x20,
         dbshfl_op = 0x24,
         rdhwr_op = 0x3b
@@ -179,6 +180,19 @@ enum mad_func {
 };
 
 /*
+ * func field for special3 lx opcodes (Cavium Octeon).
+ */
+enum lx_func {
+        lwx_op  = 0x00,
+        lhx_op  = 0x04,
+        lbux_op = 0x06,
+        ldx_op  = 0x08,
+        lwux_op = 0x10,
+        lhux_op = 0x14,
+        lbx_op  = 0x16,
+};
+
+/*
  * Damn ...  bitfields depend from byteorder :-(
  */
 #ifdef __MIPSEB__
diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h
index d361df32eef8..dcbd4bb417ec 100644
--- a/arch/mips/include/asm/uasm.h
+++ b/arch/mips/include/asm/uasm.h
@@ -119,6 +119,8 @@ Ip_u2u1msbu3(_dinsm);
 Ip_u1(_syscall);
 Ip_u1u2s3(_bbit0);
 Ip_u1u2s3(_bbit1);
+Ip_u3u1u2(_lwx);
+Ip_u3u1u2(_ldx);
 
 /* Handle labels. */
 struct uasm_label {
@@ -156,6 +158,7 @@ static inline void __uasminit uasm_l##lb(struct uasm_label **lab, u32 *addr) \
 # define UASM_i_SUBU(buf, rs, rt, rd) uasm_i_dsubu(buf, rs, rt, rd)
 # define UASM_i_LL(buf, rs, rt, off) uasm_i_lld(buf, rs, rt, off)
 # define UASM_i_SC(buf, rs, rt, off) uasm_i_scd(buf, rs, rt, off)
+# define UASM_i_LWX(buf, rs, rt, rd) uasm_i_ldx(buf, rs, rt, rd)
 #else
 # define UASM_i_LW(buf, rs, rt, off) uasm_i_lw(buf, rs, rt, off)
 # define UASM_i_SW(buf, rs, rt, off) uasm_i_sw(buf, rs, rt, off)
@@ -170,6 +173,7 @@ static inline void __uasminit uasm_l##lb(struct uasm_label **lab, u32 *addr) \
 # define UASM_i_SUBU(buf, rs, rt, rd) uasm_i_subu(buf, rs, rt, rd)
 # define UASM_i_LL(buf, rs, rt, off) uasm_i_ll(buf, rs, rt, off)
 # define UASM_i_SC(buf, rs, rt, off) uasm_i_sc(buf, rs, rt, off)
+# define UASM_i_LWX(buf, rs, rt, rd) uasm_i_lwx(buf, rs, rt, rd)
 #endif
 
 #define uasm_i_b(buf, off) uasm_i_beq(buf, 0, 0, off)