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authorDavid Daney <ddaney@caviumnetworks.com>2010-12-27 18:07:56 -0800
committerRalf Baechle <ralf@linux-mips.org>2011-01-18 19:30:23 +0100
commitbb3d68c30a00918d4c9fa02a5c17a5aacf597977 (patch)
tree6d6db066452de4a2ec28f24bc7b0c287eabd9967
parentcc33ae437975416a1b78f99e2715e91ab643526a (diff)
downloadlinux-bb3d68c30a00918d4c9fa02a5c17a5aacf597977.tar.bz2
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>
-rw-r--r--arch/mips/include/asm/inst.h14
-rw-r--r--arch/mips/include/asm/uasm.h4
-rw-r--r--arch/mips/mm/uasm.c7
3 files changed, 24 insertions, 1 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)
diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c
index 99f0347e82d2..357916de0fab 100644
--- 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>