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[PATCH 1/3] MIPS: Add SYSCALL to uasm.

To: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: [PATCH 1/3] MIPS: Add SYSCALL to uasm.
From: David Daney <ddaney@caviumnetworks.com>
Date: Thu, 18 Feb 2010 16:13:03 -0800
Cc: David Daney <ddaney@caviumnetworks.com>
In-reply-to: <1266538385-29088-1-git-send-email-ddaney@caviumnetworks.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <1266538385-29088-1-git-send-email-ddaney@caviumnetworks.com>
Sender: linux-mips-bounce@linux-mips.org
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
---
 arch/mips/include/asm/uasm.h |    1 +
 arch/mips/mm/uasm.c          |   19 +++++++++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h
index b99bd07..32fe2ec 100644
--- a/arch/mips/include/asm/uasm.h
+++ b/arch/mips/include/asm/uasm.h
@@ -102,6 +102,7 @@ Ip_0(_tlbwr);
 Ip_u3u1u2(_xor);
 Ip_u2u1u3(_xori);
 Ip_u2u1msbu3(_dins);
+Ip_u1(_syscall);
 
 /* Handle labels. */
 struct uasm_label {
diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c
index 1581e98..d22d7bc 100644
--- a/arch/mips/mm/uasm.c
+++ b/arch/mips/mm/uasm.c
@@ -31,7 +31,8 @@ enum fields {
        BIMM = 0x040,
        JIMM = 0x080,
        FUNC = 0x100,
-       SET = 0x200
+       SET = 0x200,
+       SCIMM = 0x400
 };
 
 #define OP_MASK                0x3f
@@ -52,6 +53,8 @@ enum fields {
 #define FUNC_SH                0
 #define SET_MASK       0x7
 #define SET_SH         0
+#define SCIMM_MASK     0xfffff
+#define SCIMM_SH       6
 
 enum opcode {
        insn_invalid,
@@ -64,7 +67,7 @@ enum opcode {
        insn_mtc0, insn_ori, 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_dins, insn_syscall
 };
 
 struct insn {
@@ -136,6 +139,7 @@ static struct insn insn_table[] __cpuinitdata = {
        { insn_xor,  M(spec_op, 0, 0, 0, 0, xor_op),  RS | RT | RD },
        { insn_xori,  M(xori_op, 0, 0, 0, 0, 0),  RS | RT | UIMM },
        { insn_dins, M(spec3_op, 0, 0, 0, 0, dins_op), RS | RT | RD | RE },
+       { insn_syscall, M(spec_op, 0, 0, 0, 0, syscall_op), SCIMM},
        { insn_invalid, 0, 0 }
 };
 
@@ -208,6 +212,14 @@ static inline __cpuinit u32 build_jimm(u32 arg)
        return (arg >> 2) & JIMM_MASK;
 }
 
+static inline __cpuinit u32 build_scimm(u32 arg)
+{
+       if (arg & ~SCIMM_MASK)
+               printk(KERN_WARNING "Micro-assembler field overflow\n");
+
+       return (arg & SCIMM_MASK) << SCIMM_SH;
+}
+
 static inline __cpuinit u32 build_func(u32 arg)
 {
        if (arg & ~FUNC_MASK)
@@ -266,6 +278,8 @@ static void __cpuinit build_insn(u32 **buf, enum opcode 
opc, ...)
                op |= build_func(va_arg(ap, u32));
        if (ip->fields & SET)
                op |= build_set(va_arg(ap, u32));
+       if (ip->fields & SCIMM)
+               op |= build_scimm(va_arg(ap, u32));
        va_end(ap);
 
        **buf = op;
@@ -391,6 +405,7 @@ I_0(_tlbwr)
 I_u3u1u2(_xor)
 I_u2u1u3(_xori)
 I_u2u1msbu3(_dins);
+I_u1(_syscall);
 
 /* Handle labels. */
 void __cpuinit uasm_build_label(struct uasm_label **lab, u32 *addr, int lid)
-- 
1.6.6


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