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-rw-r--r--arch/mips/math-emu/cp1emu.c229
-rw-r--r--arch/mips/math-emu/dp_sqrt.c2
-rw-r--r--arch/mips/math-emu/dsemul.c17
-rw-r--r--arch/mips/math-emu/dsemul.h10
-rw-r--r--arch/mips/math-emu/ieee754.c16
-rw-r--r--arch/mips/math-emu/ieee754.h180
-rw-r--r--arch/mips/math-emu/kernel_linkage.c6
7 files changed, 187 insertions, 273 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index 99c550632d44..aa5818a0d884 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -70,7 +70,7 @@ static int fpux_emu(struct pt_regs *,
/* Further private data for which no space exists in mips_fpu_soft_struct */
-struct mips_fpu_emulator_private fpuemuprivate;
+struct mips_fpu_emulator_stats fpuemustats;
/* Control registers */
@@ -79,7 +79,17 @@ struct mips_fpu_emulator_private fpuemuprivate;
/* Convert Mips rounding mode (0..3) to IEEE library modes. */
static const unsigned char ieee_rm[4] = {
- IEEE754_RN, IEEE754_RZ, IEEE754_RU, IEEE754_RD
+ [FPU_CSR_RN] = IEEE754_RN,
+ [FPU_CSR_RZ] = IEEE754_RZ,
+ [FPU_CSR_RU] = IEEE754_RU,
+ [FPU_CSR_RD] = IEEE754_RD,
+};
+/* Convert IEEE library modes to Mips rounding mode (0..3). */
+static const unsigned char mips_rm[4] = {
+ [IEEE754_RN] = FPU_CSR_RN,
+ [IEEE754_RZ] = FPU_CSR_RZ,
+ [IEEE754_RD] = FPU_CSR_RD,
+ [IEEE754_RU] = FPU_CSR_RU,
};
#if __mips >= 4
@@ -196,11 +206,11 @@ static int isBranchInstr(mips_instruction * i)
static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
{
mips_instruction ir;
- vaddr_t emulpc, contpc;
+ void * emulpc, *contpc;
unsigned int cond;
- if (get_user(ir, (mips_instruction *) xcp->cp0_epc)) {
- fpuemuprivate.stats.errors++;
+ if (get_user(ir, (mips_instruction __user *) xcp->cp0_epc)) {
+ fpuemustats.errors++;
return SIGBUS;
}
@@ -221,41 +231,39 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
* Linux MIPS branch emulator operates on context, updating the
* cp0_epc.
*/
- emulpc = REG_TO_VA(xcp->cp0_epc + 4); /* Snapshot emulation target */
+ emulpc = (void *) (xcp->cp0_epc + 4); /* Snapshot emulation target */
if (__compute_return_epc(xcp)) {
#ifdef CP1DBG
printk("failed to emulate branch at %p\n",
- REG_TO_VA(xcp->cp0_epc));
+ (void *) (xcp->cp0_epc));
#endif
return SIGILL;
}
- if (get_user(ir, (mips_instruction *) emulpc)) {
- fpuemuprivate.stats.errors++;
+ if (get_user(ir, (mips_instruction __user *) emulpc)) {
+ fpuemustats.errors++;
return SIGBUS;
}
/* __compute_return_epc() will have updated cp0_epc */
- contpc = REG_TO_VA xcp->cp0_epc;
+ contpc = (void *) xcp->cp0_epc;
/* In order not to confuse ptrace() et al, tweak context */
- xcp->cp0_epc = VA_TO_REG emulpc - 4;
- }
- else {
- emulpc = REG_TO_VA xcp->cp0_epc;
- contpc = REG_TO_VA(xcp->cp0_epc + 4);
+ xcp->cp0_epc = (unsigned long) emulpc - 4;
+ } else {
+ emulpc = (void *) xcp->cp0_epc;
+ contpc = (void *) (xcp->cp0_epc + 4);
}
emul:
- fpuemuprivate.stats.emulated++;
+ fpuemustats.emulated++;
switch (MIPSInst_OPCODE(ir)) {
-#ifndef SINGLE_ONLY_FPU
case ldc1_op:{
- u64 *va = REG_TO_VA(xcp->regs[MIPSInst_RS(ir)] +
+ u64 __user *va = (u64 __user *) (xcp->regs[MIPSInst_RS(ir)] +
MIPSInst_SIMM(ir));
u64 val;
- fpuemuprivate.stats.loads++;
+ fpuemustats.loads++;
if (get_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
DITOREG(val, MIPSInst_RT(ir));
@@ -263,55 +271,42 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
}
case sdc1_op:{
- u64 *va = REG_TO_VA(xcp->regs[MIPSInst_RS(ir)] +
+ u64 __user *va = (u64 __user *) (xcp->regs[MIPSInst_RS(ir)] +
MIPSInst_SIMM(ir));
u64 val;
- fpuemuprivate.stats.stores++;
+ fpuemustats.stores++;
DIFROMREG(val, MIPSInst_RT(ir));
if (put_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
break;
}
-#endif
case lwc1_op:{
- u32 *va = REG_TO_VA(xcp->regs[MIPSInst_RS(ir)] +
+ u32 __user *va = (u32 __user *) (xcp->regs[MIPSInst_RS(ir)] +
MIPSInst_SIMM(ir));
u32 val;
- fpuemuprivate.stats.loads++;
+ fpuemustats.loads++;
if (get_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
-#ifdef SINGLE_ONLY_FPU
- if (MIPSInst_RT(ir) & 1) {
- /* illegal register in single-float mode */
- return SIGILL;
- }
-#endif
SITOREG(val, MIPSInst_RT(ir));
break;
}
case swc1_op:{
- u32 *va = REG_TO_VA(xcp->regs[MIPSInst_RS(ir)] +
+ u32 __user *va = (u32 __user *) (xcp->regs[MIPSInst_RS(ir)] +
MIPSInst_SIMM(ir));
u32 val;
- fpuemuprivate.stats.stores++;
-#ifdef SINGLE_ONLY_FPU
- if (MIPSInst_RT(ir) & 1) {
- /* illegal register in single-float mode */
- return SIGILL;
- }
-#endif
+ fpuemustats.stores++;
SIFROMREG(val, MIPSInst_RT(ir));
if (put_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
break;
@@ -320,7 +315,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
case cop1_op:
switch (MIPSInst_RS(ir)) {
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
case dmfc_op:
/* copregister fs -> gpr[rt] */
if (MIPSInst_RT(ir) != 0) {
@@ -337,12 +332,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
case mfc_op:
/* copregister rd -> gpr[rt] */
-#ifdef SINGLE_ONLY_FPU
- if (MIPSInst_RD(ir) & 1) {
- /* illegal register in single-float mode */
- return SIGILL;
- }
-#endif
if (MIPSInst_RT(ir) != 0) {
SIFROMREG(xcp->regs[MIPSInst_RT(ir)],
MIPSInst_RD(ir));
@@ -351,12 +340,6 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
case mtc_op:
/* copregister rd <- rt */
-#ifdef SINGLE_ONLY_FPU
- if (MIPSInst_RD(ir) & 1) {
- /* illegal register in single-float mode */
- return SIGILL;
- }
-#endif
SITOREG(xcp->regs[MIPSInst_RT(ir)], MIPSInst_RD(ir));
break;
@@ -369,9 +352,10 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
}
if (MIPSInst_RD(ir) == FPCREG_CSR) {
value = ctx->fcr31;
+ value = (value & ~0x3) | mips_rm[value & 0x3];
#ifdef CSRTRACE
printk("%p gpr[%d]<-csr=%08x\n",
- REG_TO_VA(xcp->cp0_epc),
+ (void *) (xcp->cp0_epc),
MIPSInst_RT(ir), value);
#endif
}
@@ -398,14 +382,13 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
if (MIPSInst_RD(ir) == FPCREG_CSR) {
#ifdef CSRTRACE
printk("%p gpr[%d]->csr=%08x\n",
- REG_TO_VA(xcp->cp0_epc),
+ (void *) (xcp->cp0_epc),
MIPSInst_RT(ir), value);
#endif
- ctx->fcr31 = value;
- /* copy new rounding mode and
- flush bit to ieee library state! */
- ieee754_csr.nod = (ctx->fcr31 & 0x1000000) != 0;
- ieee754_csr.rm = ieee_rm[value & 0x3];
+ value &= (FPU_CSR_FLUSH | FPU_CSR_ALL_E | FPU_CSR_ALL_S | 0x03);
+ ctx->fcr31 &= ~(FPU_CSR_FLUSH | FPU_CSR_ALL_E | FPU_CSR_ALL_S | 0x03);
+ /* convert to ieee library modes */
+ ctx->fcr31 |= (value & ~0x3) | ieee_rm[value & 0x3];
}
if ((ctx->fcr31 >> 5) & ctx->fcr31 & FPU_CSR_ALL_E) {
return SIGFPE;
@@ -445,20 +428,20 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
* instruction
*/
xcp->cp0_epc += 4;
- contpc = REG_TO_VA
+ contpc = (void *)
(xcp->cp0_epc +
(MIPSInst_SIMM(ir) << 2));
- if (get_user(ir, (mips_instruction *)
- REG_TO_VA xcp->cp0_epc)) {
- fpuemuprivate.stats.errors++;
+ if (get_user(ir,
+ (mips_instruction __user *) xcp->cp0_epc)) {
+ fpuemustats.errors++;
return SIGBUS;
}
switch (MIPSInst_OPCODE(ir)) {
case lwc1_op:
case swc1_op:
-#if (__mips >= 2 || __mips64) && !defined(SINGLE_ONLY_FPU)
+#if (__mips >= 2 || defined(__mips64))
case ldc1_op:
case sdc1_op:
#endif
@@ -480,7 +463,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
* Single step the non-cp1
* instruction in the dslot
*/
- return mips_dsemul(xcp, ir, VA_TO_REG contpc);
+ return mips_dsemul(xcp, ir, (unsigned long) contpc);
}
else {
/* branch not taken */
@@ -539,8 +522,9 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx)
}
/* we did it !! */
- xcp->cp0_epc = VA_TO_REG(contpc);
+ xcp->cp0_epc = (unsigned long) contpc;
xcp->cp0_cause &= ~CAUSEF_BD;
+
return 0;
}
@@ -570,7 +554,7 @@ static const unsigned char cmptab[8] = {
static ieee754##p fpemu_##p##_##name (ieee754##p r, ieee754##p s, \
ieee754##p t) \
{ \
- struct ieee754_csr ieee754_csr_save; \
+ struct _ieee754_csr ieee754_csr_save; \
s = f1 (s, t); \
ieee754_csr_save = ieee754_csr; \
s = f2 (s, r); \
@@ -616,54 +600,38 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
{
unsigned rcsr = 0; /* resulting csr */
- fpuemuprivate.stats.cp1xops++;
+ fpuemustats.cp1xops++;
switch (MIPSInst_FMA_FFMT(ir)) {
case s_fmt:{ /* 0 */
ieee754sp(*handler) (ieee754sp, ieee754sp, ieee754sp);
ieee754sp fd, fr, fs, ft;
- u32 *va;
+ u32 __user *va;
u32 val;
switch (MIPSInst_FUNC(ir)) {
case lwxc1_op:
- va = REG_TO_VA(xcp->regs[MIPSInst_FR(ir)] +
+ va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
xcp->regs[MIPSInst_FT(ir)]);
- fpuemuprivate.stats.loads++;
+ fpuemustats.loads++;
if (get_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
-#ifdef SINGLE_ONLY_FPU
- if (MIPSInst_FD(ir) & 1) {
- /* illegal register in single-float
- * mode
- */
- return SIGILL;
- }
-#endif
SITOREG(val, MIPSInst_FD(ir));
break;
case swxc1_op:
- va = REG_TO_VA(xcp->regs[MIPSInst_FR(ir)] +
+ va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
xcp->regs[MIPSInst_FT(ir)]);
- fpuemuprivate.stats.stores++;
-#ifdef SINGLE_ONLY_FPU
- if (MIPSInst_FS(ir) & 1) {
- /* illegal register in single-float
- * mode
- */
- return SIGILL;
- }
-#endif
+ fpuemustats.stores++;
SIFROMREG(val, MIPSInst_FS(ir));
if (put_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
break;
@@ -699,8 +667,6 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
rcsr |= FPU_CSR_INV_X | FPU_CSR_INV_S;
ctx->fcr31 = (ctx->fcr31 & ~FPU_CSR_ALL_X) | rcsr;
- if (ieee754_csr.nod)
- ctx->fcr31 |= 0x1000000;
if ((ctx->fcr31 >> 5) & ctx->fcr31 & FPU_CSR_ALL_E) {
/*printk ("SIGFPE: fpu csr = %08x\n",
ctx->fcr31); */
@@ -715,34 +681,33 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
break;
}
-#ifndef SINGLE_ONLY_FPU
case d_fmt:{ /* 1 */
ieee754dp(*handler) (ieee754dp, ieee754dp, ieee754dp);
ieee754dp fd, fr, fs, ft;
- u64 *va;
+ u64 __user *va;
u64 val;
switch (MIPSInst_FUNC(ir)) {
case ldxc1_op:
- va = REG_TO_VA(xcp->regs[MIPSInst_FR(ir)] +
+ va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
xcp->regs[MIPSInst_FT(ir)]);
- fpuemuprivate.stats.loads++;
+ fpuemustats.loads++;
if (get_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
DITOREG(val, MIPSInst_FD(ir));
break;
case sdxc1_op:
- va = REG_TO_VA(xcp->regs[MIPSInst_FR(ir)] +
+ va = (void __user *) (xcp->regs[MIPSInst_FR(ir)] +
xcp->regs[MIPSInst_FT(ir)]);
- fpuemuprivate.stats.stores++;
+ fpuemustats.stores++;
DIFROMREG(val, MIPSInst_FS(ir));
if (put_user(val, va)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
break;
@@ -773,7 +738,6 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
}
break;
}
-#endif
case 0x7: /* 7 */
if (MIPSInst_FUNC(ir) != pfetch_op) {
@@ -810,7 +774,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
#endif
} rv; /* resulting value */
- fpuemuprivate.stats.cp1ops++;
+ fpuemustats.cp1ops++;
switch (rfmt = (MIPSInst_FFMT(ir) & 0xf)) {
case s_fmt:{ /* 0 */
union {
@@ -834,7 +798,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
goto scopbop;
/* unary ops */
-#if __mips >= 2 || __mips64
+#if __mips >= 2 || defined(__mips64)
case fsqrt_op:
handler.u = ieee754sp_sqrt;
goto scopuop;
@@ -913,9 +877,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
case fcvts_op:
return SIGILL; /* not defined */
case fcvtd_op:{
-#ifdef SINGLE_ONLY_FPU
- return SIGILL; /* not defined */
-#else
ieee754sp fs;
SPFROMREG(fs, MIPSInst_FS(ir));
@@ -923,7 +884,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
rfmt = d_fmt;
goto copcsr;
}
-#endif
case fcvtw_op:{
ieee754sp fs;
@@ -933,7 +893,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
goto copcsr;
}
-#if __mips >= 2 || __mips64
+#if __mips >= 2 || defined(__mips64)
case fround_op:
case ftrunc_op:
case fceil_op:
@@ -950,7 +910,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
}
#endif /* __mips >= 2 */
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
case fcvtl_op:{
ieee754sp fs;
@@ -974,7 +934,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
rfmt = l_fmt;
goto copcsr;
}
-#endif /* __mips64 && !fpu(single) */
+#endif /* defined(__mips64) */
default:
if (MIPSInst_FUNC(ir) >= fcmp_op) {
@@ -1001,7 +961,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
break;
}
-#ifndef SINGLE_ONLY_FPU
case d_fmt:{
union {
ieee754dp(*b) (ieee754dp, ieee754dp);
@@ -1024,7 +983,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
goto dcopbop;
/* unary ops */
-#if __mips >= 2 || __mips64
+#if __mips >= 2 || defined(__mips64)
case fsqrt_op:
handler.u = ieee754dp_sqrt;
goto dcopuop;
@@ -1108,7 +1067,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
goto copcsr;
}
-#if __mips >= 2 || __mips64
+#if __mips >= 2 || defined(__mips64)
case fround_op:
case ftrunc_op:
case fceil_op:
@@ -1125,7 +1084,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
}
#endif
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
case fcvtl_op:{
ieee754dp fs;
@@ -1149,7 +1108,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
rfmt = l_fmt;
goto copcsr;
}
-#endif /* __mips >= 3 && !fpu(single) */
+#endif /* __mips >= 3 */
default:
if (MIPSInst_FUNC(ir) >= fcmp_op) {
@@ -1177,7 +1136,6 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
}
break;
}
-#endif /* ifndef SINGLE_ONLY_FPU */
case w_fmt:{
ieee754sp fs;
@@ -1189,21 +1147,19 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
rv.s = ieee754sp_fint(fs.bits);
rfmt = s_fmt;
goto copcsr;
-#ifndef SINGLE_ONLY_FPU
case fcvtd_op:
/* convert word to double precision real */
SPFROMREG(fs, MIPSInst_FS(ir));
rv.d = ieee754dp_fint(fs.bits);
rfmt = d_fmt;
goto copcsr;
-#endif
default:
return SIGILL;
}
break;
}
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
case l_fmt:{
switch (MIPSInst_FUNC(ir)) {
case fcvts_op:
@@ -1256,18 +1212,16 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
ctx->fcr31 &= ~cond;
break;
}
-#ifndef SINGLE_ONLY_FPU
case d_fmt:
DPTOREG(rv.d, MIPSInst_FD(ir));
break;
-#endif
case s_fmt:
SPTOREG(rv.s, MIPSInst_FD(ir));
break;
case w_fmt:
SITOREG(rv.w, MIPSInst_FD(ir));
break;
-#if defined(__mips64) && !defined(SINGLE_ONLY_FPU)
+#if defined(__mips64)
case l_fmt:
DITOREG(rv.l, MIPSInst_FD(ir));
break;
@@ -1279,10 +1233,10 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_soft_struct *ctx,
return 0;
}
-int fpu_emulator_cop1Handler(int xcptno, struct pt_regs *xcp,
+int fpu_emulator_cop1Handler(struct pt_regs *xcp,
struct mips_fpu_soft_struct *ctx)
{
- gpreg_t oldepc, prevepc;
+ unsigned long oldepc, prevepc;
mips_instruction insn;
int sig = 0;
@@ -1290,19 +1244,24 @@ int fpu_emulator_cop1Handler(int xcptno, struct pt_regs *xcp,
do {
prevepc = xcp->cp0_epc;
- if (get_user(insn, (mips_instruction *) xcp->cp0_epc)) {
- fpuemuprivate.stats.errors++;
+ if (get_user(insn, (mips_instruction __user *) xcp->cp0_epc)) {
+ fpuemustats.errors++;
return SIGBUS;
}
if (insn == 0)
xcp->cp0_epc += 4; /* skip nops */
else {
- /* Update ieee754_csr. Only relevant if we have a
- h/w FPU */
- ieee754_csr.nod = (ctx->fcr31 & 0x1000000) != 0;
- ieee754_csr.rm = ieee_rm[ctx->fcr31 & 0x3];
- ieee754_csr.cx = (ctx->fcr31 >> 12) & 0x1f;
+ /*
+ * The 'ieee754_csr' is an alias of
+ * ctx->fcr31. No need to copy ctx->fcr31 to
+ * ieee754_csr. But ieee754_csr.rm is ieee
+ * library modes. (not mips rounding mode)
+ */
+ /* convert to ieee library modes */
+ ieee754_csr.rm = ieee_rm[ieee754_csr.rm];
sig = cop1Emulate(xcp, ctx);
+ /* revert to mips rounding mode */
+ ieee754_csr.rm = mips_rm[ieee754_csr.rm];
}
if (cpu_has_fpu)
diff --git a/arch/mips/math-emu/dp_sqrt.c b/arch/mips/math-emu/dp_sqrt.c
index c35e871ae975..032328c49888 100644
--- a/arch/mips/math-emu/dp_sqrt.c
+++ b/arch/mips/math-emu/dp_sqrt.c
@@ -37,7 +37,7 @@ static const unsigned table[] = {
ieee754dp ieee754dp_sqrt(ieee754dp x)
{
- struct ieee754_csr oldcsr;
+ struct _ieee754_csr oldcsr;
ieee754dp y, z, t;
unsigned scalx, yh;
COMPXDP;
diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c
index aa989c2246da..8079f3d1eca0 100644
--- a/arch/mips/math-emu/dsemul.c
+++ b/arch/mips/math-emu/dsemul.c
@@ -28,9 +28,6 @@
#endif
#define __mips 4
-extern struct mips_fpu_emulator_private fpuemuprivate;
-
-
/*
* Emulate the arbritrary instruction ir at xcp->cp0_epc. Required when
* we have to emulate the instruction in a COP1 branch delay slot. Do
@@ -52,10 +49,10 @@ struct emuframe {
mips_instruction emul;
mips_instruction badinst;
mips_instruction cookie;
- gpreg_t epc;
+ unsigned long epc;
};
-int mips_dsemul(struct pt_regs *regs, mips_instruction ir, gpreg_t cpc)
+int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc)
{
extern asmlinkage void handle_dsemulret(void);
mips_instruction *dsemul_insns;
@@ -91,7 +88,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, gpreg_t cpc)
*/
/* Ensure that the two instructions are in the same cache line */
- dsemul_insns = (mips_instruction *) REG_TO_VA ((regs->regs[29] - sizeof(struct emuframe)) & ~0x7);
+ dsemul_insns = (mips_instruction *) ((regs->regs[29] - sizeof(struct emuframe)) & ~0x7);
fr = (struct emuframe *) dsemul_insns;
/* Verify that the stack pointer is not competely insane */
@@ -104,11 +101,11 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, gpreg_t cpc)
err |= __put_user(cpc, &fr->epc);
if (unlikely(err)) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return SIGBUS;
}
- regs->cp0_epc = VA_TO_REG & fr->emul;
+ regs->cp0_epc = (unsigned long) &fr->emul;
flush_cache_sigtramp((unsigned long)&fr->badinst);
@@ -118,7 +115,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, gpreg_t cpc)
int do_dsemulret(struct pt_regs *xcp)
{
struct emuframe *fr;
- gpreg_t epc;
+ unsigned long epc;
u32 insn, cookie;
int err = 0;
@@ -141,7 +138,7 @@ int do_dsemulret(struct pt_regs *xcp)
err |= __get_user(cookie, &fr->cookie);
if (unlikely(err || (insn != BADINST) || (cookie != BD_COOKIE))) {
- fpuemuprivate.stats.errors++;
+ fpuemustats.errors++;
return 0;
}
diff --git a/arch/mips/math-emu/dsemul.h b/arch/mips/math-emu/dsemul.h
index dbd85f95268d..091f0e76730f 100644
--- a/arch/mips/math-emu/dsemul.h
+++ b/arch/mips/math-emu/dsemul.h
@@ -1,11 +1,5 @@
-typedef long gpreg_t;
-typedef void *vaddr_t;
-
-#define REG_TO_VA (vaddr_t)
-#define VA_TO_REG (gpreg_t)
-
-int mips_dsemul(struct pt_regs *regs, mips_instruction ir, gpreg_t cpc);
-int do_dsemulret(struct pt_regs *xcp);
+extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc);
+extern int do_dsemulret(struct pt_regs *xcp);
/* Instruction which will always cause an address error */
#define AdELOAD 0x8c000001 /* lw $0,1($0) */
diff --git a/arch/mips/math-emu/ieee754.c b/arch/mips/math-emu/ieee754.c
index f0a364adbf34..a93c45dbdefd 100644
--- a/arch/mips/math-emu/ieee754.c
+++ b/arch/mips/math-emu/ieee754.c
@@ -31,6 +31,8 @@
#include "ieee754int.h"
+#include "ieee754sp.h"
+#include "ieee754dp.h"
#define DP_EBIAS 1023
#define DP_EMIN (-1022)
@@ -40,20 +42,6 @@
#define SP_EMIN (-126)
#define SP_EMAX 127
-/* indexed by class */
-const char *const ieee754_cname[] = {
- "Normal",
- "Zero",
- "Denormal",
- "Infinity",
- "QNaN",
- "SNaN",
-};
-
-/* the control status register
-*/
-struct ieee754_csr ieee754_csr;
-
/* special constants
*/
diff --git a/arch/mips/math-emu/ieee754.h b/arch/mips/math-emu/ieee754.h
index b8772f46972d..171f177c0f88 100644
--- a/arch/mips/math-emu/ieee754.h
+++ b/arch/mips/math-emu/ieee754.h
@@ -1,13 +1,8 @@
-/* single and double precision fp ops
- * missing extended precision.
-*/
/*
* MIPS floating point support
* Copyright (C) 1994-2000 Algorithmics Ltd.
* http://www.algor.co.uk
*
- * ########################################################################
- *
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
@@ -21,20 +16,18 @@
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
- * ########################################################################
- */
-
-/**************************************************************************
* Nov 7, 2000
* Modification to allow integration with Linux kernel
*
* Kevin D. Kissell, kevink@mips.com and Carsten Langgard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *************************************************************************/
+ */
+#ifndef __ARCH_MIPS_MATH_EMU_IEEE754_H
+#define __ARCH_MIPS_MATH_EMU_IEEE754_H
-#ifdef __KERNEL__
-/* Going from Algorithmics to Linux native environment, add this */
+#include <asm/byteorder.h>
#include <linux/types.h>
+#include <linux/sched.h>
/*
* Not very pretty, but the Linux kernel's normal va_list definition
@@ -44,18 +37,7 @@
#include <stdarg.h>
#endif
-#else
-
-/* Note that __KERNEL__ is taken to mean Linux kernel */
-
-#if #system(OpenBSD)
-#include <machine/types.h>
-#endif
-#include <machine/endian.h>
-
-#endif /* __KERNEL__ */
-
-#if (defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN) || defined(__MIPSEL__)
+#ifdef __LITTLE_ENDIAN
struct ieee754dp_konst {
unsigned mantlo:32;
unsigned manthi:20;
@@ -86,13 +68,14 @@ typedef union _ieee754sp {
} ieee754sp;
#endif
-#if (defined(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN) || defined(__MIPSEB__)
+#ifdef __BIG_ENDIAN
struct ieee754dp_konst {
unsigned sign:1;
unsigned bexp:11;
unsigned manthi:20;
unsigned mantlo:32;
};
+
typedef union _ieee754dp {
struct ieee754dp_konst oparts;
struct {
@@ -222,7 +205,6 @@ ieee754dp ieee754dp_sqrt(ieee754dp x);
#define IEEE754_CLASS_INF 0x03
#define IEEE754_CLASS_SNAN 0x04
#define IEEE754_CLASS_QNAN 0x05
-extern const char *const ieee754_cname[];
/* exception numbers */
#define IEEE754_INEXACT 0x01
@@ -251,93 +233,109 @@ extern const char *const ieee754_cname[];
/* "normal" comparisons
*/
-static __inline int ieee754sp_eq(ieee754sp x, ieee754sp y)
+static inline int ieee754sp_eq(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CEQ, 0);
}
-static __inline int ieee754sp_ne(ieee754sp x, ieee754sp y)
+static inline int ieee754sp_ne(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y,
IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0);
}
-static __inline int ieee754sp_lt(ieee754sp x, ieee754sp y)
+static inline int ieee754sp_lt(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CLT, 0);
}
-static __inline int ieee754sp_le(ieee754sp x, ieee754sp y)
+static inline int ieee754sp_le(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0);
}
-static __inline int ieee754sp_gt(ieee754sp x, ieee754sp y)
+static inline int ieee754sp_gt(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CGT, 0);
}
-static __inline int ieee754sp_ge(ieee754sp x, ieee754sp y)
+static inline int ieee754sp_ge(ieee754sp x, ieee754sp y)
{
return ieee754sp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0);
}
-static __inline int ieee754dp_eq(ieee754dp x, ieee754dp y)
+static inline int ieee754dp_eq(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CEQ, 0);
}
-static __inline int ieee754dp_ne(ieee754dp x, ieee754dp y)
+static inline int ieee754dp_ne(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y,
IEEE754_CLT | IEEE754_CGT | IEEE754_CUN, 0);
}
-static __inline int ieee754dp_lt(ieee754dp x, ieee754dp y)
+static inline int ieee754dp_lt(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CLT, 0);
}
-static __inline int ieee754dp_le(ieee754dp x, ieee754dp y)
+static inline int ieee754dp_le(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CLT | IEEE754_CEQ, 0);
}
-static __inline int ieee754dp_gt(ieee754dp x, ieee754dp y)
+static inline int ieee754dp_gt(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CGT, 0);
}
-static __inline int ieee754dp_ge(ieee754dp x, ieee754dp y)
+static inline int ieee754dp_ge(ieee754dp x, ieee754dp y)
{
return ieee754dp_cmp(x, y, IEEE754_CGT | IEEE754_CEQ, 0);
}
-/* like strtod
-*/
+/*
+ * Like strtod
+ */
ieee754dp ieee754dp_fstr(const char *s, char **endp);
char *ieee754dp_tstr(ieee754dp x, int prec, int fmt, int af);
-/* the control status register
-*/
-struct ieee754_csr {
- unsigned pad:13;
+/*
+ * The control status register
+ */
+struct _ieee754_csr {
+#ifdef __BIG_ENDIAN
+ unsigned pad0:7;
unsigned nod:1; /* set 1 for no denormalised numbers */
- unsigned cx:5; /* exceptions this operation */
+ unsigned c:1; /* condition */
+ unsigned pad1:5;
+ unsigned cx:6; /* exceptions this operation */
unsigned mx:5; /* exception enable mask */
unsigned sx:5; /* exceptions total */
unsigned rm:2; /* current rounding mode */
+#endif
+#ifdef __LITTLE_ENDIAN
+ unsigned rm:2; /* current rounding mode */
+ unsigned sx:5; /* exceptions total */
+ unsigned mx:5; /* exception enable mask */
+ unsigned cx:6; /* exceptions this operation */
+ unsigned pad1:5;
+ unsigned c:1; /* condition */
+ unsigned nod:1; /* set 1 for no denormalised numbers */
+ unsigned pad0:7;
+#endif
};
-extern struct ieee754_csr ieee754_csr;
+#define ieee754_csr (*(struct _ieee754_csr *)(&current->thread.fpu.soft.fcr31))
-static __inline unsigned ieee754_getrm(void)
+static inline unsigned ieee754_getrm(void)
{
return (ieee754_csr.rm);
}
-static __inline unsigned ieee754_setrm(unsigned rm)
+static inline unsigned ieee754_setrm(unsigned rm)
{
return (ieee754_csr.rm = rm);
}
@@ -345,14 +343,14 @@ static __inline unsigned ieee754_setrm(unsigned rm)
/*
* get current exceptions
*/
-static __inline unsigned ieee754_getcx(void)
+static inline unsigned ieee754_getcx(void)
{
return (ieee754_csr.cx);
}
/* test for current exception condition
*/
-static __inline int ieee754_cxtest(unsigned n)
+static inline int ieee754_cxtest(unsigned n)
{
return (ieee754_csr.cx & n);
}
@@ -360,21 +358,21 @@ static __inline int ieee754_cxtest(unsigned n)
/*
* get sticky exceptions
*/
-static __inline unsigned ieee754_getsx(void)
+static inline unsigned ieee754_getsx(void)
{
return (ieee754_csr.sx);
}
/* clear sticky conditions
*/
-static __inline unsigned ieee754_clrsx(void)
+static inline unsigned ieee754_clrsx(void)
{
return (ieee754_csr.sx = 0);
}
/* test for sticky exception condition
*/
-static __inline int ieee754_sxtest(unsigned n)
+static inline int ieee754_sxtest(unsigned n)
{
return (ieee754_csr.sx & n);
}
@@ -406,52 +404,34 @@ extern const struct ieee754sp_konst __ieee754sp_spcvals[];
#define ieee754dp_spcvals ((const ieee754dp *)__ieee754dp_spcvals)
#define ieee754sp_spcvals ((const ieee754sp *)__ieee754sp_spcvals)
-/* return infinity with given sign
-*/
-#define ieee754dp_inf(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
-#define ieee754dp_zero(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
-#define ieee754dp_one(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
-#define ieee754dp_ten(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
-#define ieee754dp_indef() \
- (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF])
-#define ieee754dp_max(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
-#define ieee754dp_min(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
-#define ieee754dp_mind(sn) \
- (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
-#define ieee754dp_1e31() \
- (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
-#define ieee754dp_1e63() \
- (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])
-
-#define ieee754sp_inf(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
-#define ieee754sp_zero(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
-#define ieee754sp_one(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
-#define ieee754sp_ten(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
-#define ieee754sp_indef() \
- (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF])
-#define ieee754sp_max(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
-#define ieee754sp_min(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
-#define ieee754sp_mind(sn) \
- (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
-#define ieee754sp_1e31() \
- (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
-#define ieee754sp_1e63() \
- (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])
-
-/* indefinite integer value
-*/
+/*
+ * Return infinity with given sign
+ */
+#define ieee754dp_inf(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
+#define ieee754dp_zero(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
+#define ieee754dp_one(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
+#define ieee754dp_ten(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
+#define ieee754dp_indef() (ieee754dp_spcvals[IEEE754_SPCVAL_INDEF])
+#define ieee754dp_max(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
+#define ieee754dp_min(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
+#define ieee754dp_mind(sn) (ieee754dp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
+#define ieee754dp_1e31() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E31])
+#define ieee754dp_1e63() (ieee754dp_spcvals[IEEE754_SPCVAL_P1E63])
+
+#define ieee754sp_inf(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PINFINITY+(sn)])
+#define ieee754sp_zero(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PZERO+(sn)])
+#define ieee754sp_one(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PONE+(sn)])
+#define ieee754sp_ten(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PTEN+(sn)])
+#define ieee754sp_indef() (ieee754sp_spcvals[IEEE754_SPCVAL_INDEF])
+#define ieee754sp_max(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMAX+(sn)])
+#define ieee754sp_min(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIN+(sn)])
+#define ieee754sp_mind(sn) (ieee754sp_spcvals[IEEE754_SPCVAL_PMIND+(sn)])
+#define ieee754sp_1e31() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E31])
+#define ieee754sp_1e63() (ieee754sp_spcvals[IEEE754_SPCVAL_P1E63])
+
+/*
+ * Indefinite integer value
+ */
#define ieee754si_indef() INT_MAX
#ifdef LONG_LONG_MAX
#define ieee754di_indef() LONG_LONG_MAX
@@ -487,3 +467,5 @@ extern void ieee754_xcpt(struct ieee754xctx *xcp);
/* compat */
#define ieee754dp_fix(x) ieee754dp_tint(x)
#define ieee754sp_fix(x) ieee754sp_tint(x)
+
+#endif /* __ARCH_MIPS_MATH_EMU_IEEE754_H */
diff --git a/arch/mips/math-emu/kernel_linkage.c b/arch/mips/math-emu/kernel_linkage.c
index 4002f0cf79f3..d187ab71c2ff 100644
--- a/arch/mips/math-emu/kernel_linkage.c
+++ b/arch/mips/math-emu/kernel_linkage.c
@@ -27,8 +27,6 @@
#include <asm/fpu_emulator.h>
-extern struct mips_fpu_emulator_private fpuemuprivate;
-
#define SIGNALLING_NAN 0x7ff800007ff80000LL
void fpu_emulator_init_fpu(void)
@@ -65,7 +63,6 @@ int fpu_emulator_save_context(struct sigcontext *sc)
&sc->sc_fpregs[i]);
}
err |= __put_user(current->thread.fpu.soft.fcr31, &sc->sc_fpc_csr);
- err |= __put_user(fpuemuprivate.eir, &sc->sc_fpc_eir);
return err;
}
@@ -81,7 +78,6 @@ int fpu_emulator_restore_context(struct sigcontext *sc)
&sc->sc_fpregs[i]);
}
err |= __get_user(current->thread.fpu.soft.fcr31, &sc->sc_fpc_csr);
- err |= __get_user(fpuemuprivate.eir, &sc->sc_fpc_eir);
return err;
}
@@ -102,7 +98,6 @@ int fpu_emulator_save_context32(struct sigcontext32 *sc)
&sc->sc_fpregs[i]);
}
err |= __put_user(current->thread.fpu.soft.fcr31, &sc->sc_fpc_csr);
- err |= __put_user(fpuemuprivate.eir, &sc->sc_fpc_eir);
return err;
}
@@ -118,7 +113,6 @@ int fpu_emulator_restore_context32(struct sigcontext32 *sc)
&sc->sc_fpregs[i]);
}
err |= __get_user(current->thread.fpu.soft.fcr31, &sc->sc_fpc_csr);
- err |= __get_user(fpuemuprivate.eir, &sc->sc_fpc_eir);
return err;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.