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>

diff --git a/arch/mips/include/asm/inst.h b/arch/mips/include/asm/inst.h
index 444ff71..7ebfc39 100644 (file)
--- 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 d361df3..dcbd4bb 100644 (file)
--- 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)

diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c
index 99f0347..357916d 100644 (file)
--- a/arch/mips/mm/uasm.c
+++ b/arch/mips/mm/uasm.c
@@ -68,7 +68,8 @@ enum opcode {
        insn_pref, insn_rfe, insn_sc, insn_scd, insn_sd, insn_sll,
        insn_sra, insn_srl, insn_rotr, insn_subu, insn_sw, insn_tlbp,
        insn_tlbr, insn_tlbwi, insn_tlbwr, insn_xor, insn_xori,
-       insn_dins, insn_dinsm, insn_syscall, insn_bbit0, insn_bbit1
+       insn_dins, insn_dinsm, insn_syscall, insn_bbit0, insn_bbit1,
+       insn_lwx, insn_ldx
 };
 
 struct insn {
@@ -146,6 +147,8 @@ static struct insn insn_table[] __uasminitdata = {
        { insn_syscall, M(spec_op, 0, 0, 0, 0, syscall_op), SCIMM},
        { insn_bbit0, M(lwc2_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
        { insn_bbit1, M(swc2_op, 0, 0, 0, 0, 0), RS | RT | BIMM },
+       { insn_lwx, M(spec3_op, 0, 0, 0, lwx_op, lx_op), RS | RT | RD },
+       { insn_ldx, M(spec3_op, 0, 0, 0, ldx_op, lx_op), RS | RT | RD },
        { insn_invalid, 0, 0 }
 };
 
@@ -434,6 +437,8 @@ I_u2u1msb32u3(_dinsm);
 I_u1(_syscall);
 I_u1u2s3(_bbit0);
 I_u1u2s3(_bbit1);
+I_u3u1u2(_lwx)
+I_u3u1u2(_ldx)
 
 #ifdef CONFIG_CPU_CAVIUM_OCTEON
 #include <asm/octeon/octeon.h>