diff mbox series

[v4,1/8] target/mips: Clean up helper.c

Message ID 1570991178-5511-2-git-send-email-aleksandar.markovic@rt-rk.com (mailing list archive)
State New, archived
Headers show
Series target/mips: Misc cleanups for September/October 2019 | expand

Commit Message

Aleksandar Markovic Oct. 13, 2019, 6:26 p.m. UTC
From: Aleksandar Markovic <amarkovic@wavecomp.com>

Mostly fix errors and warnings reported by 'checkpatch.pl -f'.

Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
---
 target/mips/helper.c | 128 +++++++++++++++++++++++++++++++--------------------
 1 file changed, 78 insertions(+), 50 deletions(-)

Comments

Markus Armbruster Oct. 14, 2019, 7:31 a.m. UTC | #1
Aleksandar Markovic <aleksandar.markovic@rt-rk.com> writes:

> From: Aleksandar Markovic <amarkovic@wavecomp.com>
>
> Mostly fix errors and warnings reported by 'checkpatch.pl -f'.
>
> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
> ---
>  target/mips/helper.c | 128 +++++++++++++++++++++++++++++++--------------------
>  1 file changed, 78 insertions(+), 50 deletions(-)
>
> diff --git a/target/mips/helper.c b/target/mips/helper.c
> index a2b6459..2411a2c 100644
> --- a/target/mips/helper.c
> +++ b/target/mips/helper.c
> @@ -39,8 +39,8 @@ enum {
>  #if !defined(CONFIG_USER_ONLY)
>  
>  /* no MMU emulation */
> -int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
> -                        target_ulong address, int rw, int access_type)
> +int no_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
> +                       target_ulong address, int rw, int access_type)
>  {
>      *physical = address;
>      *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
> @@ -48,26 +48,28 @@ int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
>  }
>  
>  /* fixed mapping MMU emulation */
> -int fixed_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
> -                           target_ulong address, int rw, int access_type)
> +int fixed_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
> +                          target_ulong address, int rw, int access_type)
>  {
>      if (address <= (int32_t)0x7FFFFFFFUL) {
> -        if (!(env->CP0_Status & (1 << CP0St_ERL)))
> +        if (!(env->CP0_Status & (1 << CP0St_ERL))) {
>              *physical = address + 0x40000000UL;
> -        else
> +        } else {
>              *physical = address;
> -    } else if (address <= (int32_t)0xBFFFFFFFUL)
> +        }
> +    } else if (address <= (int32_t)0xBFFFFFFFUL) {
>          *physical = address & 0x1FFFFFFF;
> -    else
> +    } else {
>          *physical = address;
> +    }
>  
>      *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
>      return TLBRET_MATCH;
>  }
>  
>  /* MIPS32/MIPS64 R4000-style MMU emulation */
> -int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
> -                     target_ulong address, int rw, int access_type)
> +int r4k_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
> +                    target_ulong address, int rw, int access_type)
>  {
>      uint16_t ASID = env->CP0_EntryHi & env->CP0_EntryHi_ASID_mask;
>      int i;
> @@ -99,8 +101,9 @@ int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
>              if (rw != MMU_DATA_STORE || (n ? tlb->D1 : tlb->D0)) {
>                  *physical = tlb->PFN[n] | (address & (mask >> 1));
>                  *prot = PAGE_READ;
> -                if (n ? tlb->D1 : tlb->D0)
> +                if (n ? tlb->D1 : tlb->D0) {
>                      *prot |= PAGE_WRITE;
> +                }
>                  if (!(n ? tlb->XI1 : tlb->XI0)) {
>                      *prot |= PAGE_EXEC;
>                  }
> @@ -130,8 +133,11 @@ static int is_seg_am_mapped(unsigned int am, bool eu, int mmu_idx)
>      int32_t adetlb_mask;
>  
>      switch (mmu_idx) {
> -    case 3 /* ERL */:
> -        /* If EU is set, always unmapped */
> +    case 3:
> +        /*
> +         * ERL
> +         * If EU is set, always unmapped
> +         */
>          if (eu) {
>              return 0;
>          }

This changes from the usual way we format switch case comments to an
unusual way.

If you want to pursue this change, please put it in a separate patch,
so this one is really about fixing "errors and warnings reported by
'checkpatch.pl -f'", as your commit message promises.

[...]
Aleksandar Markovic Oct. 14, 2019, 8:10 a.m. UTC | #2
On Monday, October 14, 2019, Markus Armbruster <armbru@redhat.com> wrote:

> Aleksandar Markovic <aleksandar.markovic@rt-rk.com> writes:
>
> > From: Aleksandar Markovic <amarkovic@wavecomp.com>
> >
> > Mostly fix errors and warnings reported by 'checkpatch.pl -f'.
> >
> > Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
> > ---
> >  target/mips/helper.c | 128 ++++++++++++++++++++++++++++++
> +--------------------
> >  1 file changed, 78 insertions(+), 50 deletions(-)
> >
> > diff --git a/target/mips/helper.c b/target/mips/helper.c
> > index a2b6459..2411a2c 100644
> > --- a/target/mips/helper.c
> > +++ b/target/mips/helper.c
> > @@ -39,8 +39,8 @@ enum {
> >  #if !defined(CONFIG_USER_ONLY)
> >
> >  /* no MMU emulation */
> > -int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
> > -                        target_ulong address, int rw, int access_type)
> > +int no_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
> > +                       target_ulong address, int rw, int access_type)
> >  {
> >      *physical = address;
> >      *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
> > @@ -48,26 +48,28 @@ int no_mmu_map_address (CPUMIPSState *env, hwaddr
> *physical, int *prot,
> >  }
> >
> >  /* fixed mapping MMU emulation */
> > -int fixed_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int
> *prot,
> > -                           target_ulong address, int rw, int
> access_type)
> > +int fixed_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int
> *prot,
> > +                          target_ulong address, int rw, int access_type)
> >  {
> >      if (address <= (int32_t)0x7FFFFFFFUL) {
> > -        if (!(env->CP0_Status & (1 << CP0St_ERL)))
> > +        if (!(env->CP0_Status & (1 << CP0St_ERL))) {
> >              *physical = address + 0x40000000UL;
> > -        else
> > +        } else {
> >              *physical = address;
> > -    } else if (address <= (int32_t)0xBFFFFFFFUL)
> > +        }
> > +    } else if (address <= (int32_t)0xBFFFFFFFUL) {
> >          *physical = address & 0x1FFFFFFF;
> > -    else
> > +    } else {
> >          *physical = address;
> > +    }
> >
> >      *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
> >      return TLBRET_MATCH;
> >  }
> >
> >  /* MIPS32/MIPS64 R4000-style MMU emulation */
> > -int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
> > -                     target_ulong address, int rw, int access_type)
> > +int r4k_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
> > +                    target_ulong address, int rw, int access_type)
> >  {
> >      uint16_t ASID = env->CP0_EntryHi & env->CP0_EntryHi_ASID_mask;
> >      int i;
> > @@ -99,8 +101,9 @@ int r4k_map_address (CPUMIPSState *env, hwaddr
> *physical, int *prot,
> >              if (rw != MMU_DATA_STORE || (n ? tlb->D1 : tlb->D0)) {
> >                  *physical = tlb->PFN[n] | (address & (mask >> 1));
> >                  *prot = PAGE_READ;
> > -                if (n ? tlb->D1 : tlb->D0)
> > +                if (n ? tlb->D1 : tlb->D0) {
> >                      *prot |= PAGE_WRITE;
> > +                }
> >                  if (!(n ? tlb->XI1 : tlb->XI0)) {
> >                      *prot |= PAGE_EXEC;
> >                  }
> > @@ -130,8 +133,11 @@ static int is_seg_am_mapped(unsigned int am, bool
> eu, int mmu_idx)
> >      int32_t adetlb_mask;
> >
> >      switch (mmu_idx) {
> > -    case 3 /* ERL */:
> > -        /* If EU is set, always unmapped */
> > +    case 3:
> > +        /*
> > +         * ERL
> > +         * If EU is set, always unmapped
> > +         */
> >          if (eu) {
> >              return 0;
> >          }
>
> This changes from the usual way we format switch case comments to an
> unusual way.
>
> If you want to pursue this change, please put it in a separate patch,
> so this one is really about fixing "errors and warnings reported by
> 'checkpatch.pl -f'", as your commit message promises.
>
>

Hi, Markus. Thank you for your response.

There must be some misunderstanding here:

The line:

   case 3 /* ERL */:

generates a checkpatch warning. I don't know why I would put it in a
separate patch, if this patch is about fixing checkpatch warnings. Please
explain.

Secondly, I don't see that this is a usual way we format switch statement.
I found just several cases in the whole QEMU code base (and you claimed in
previous comments that there are thousands).

I am just guessing that you somehow mixed this line with the line:

   case 3: /* ERL */

that would have not generated checkpatch warning.

I don't see any reason to change this patch. Please let me know it you
still think I should do something else. And you are welcome to analyse any
patches of mine.

Aleksandar


> [...]
>
>
Markus Armbruster Oct. 15, 2019, 7:32 a.m. UTC | #3
Aleksandar Markovic <aleksandar.m.mail@gmail.com> writes:

> --00000000000007f6800594da656e
> Content-Type: text/plain; charset="UTF-8"
>
> On Monday, October 14, 2019, Markus Armbruster <armbru@redhat.com> wrote:
>
>> Aleksandar Markovic <aleksandar.markovic@rt-rk.com> writes:
>>
>> > From: Aleksandar Markovic <amarkovic@wavecomp.com>
>> >
>> > Mostly fix errors and warnings reported by 'checkpatch.pl -f'.
>> >
>> > Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
>> > ---
>> >  target/mips/helper.c | 128 ++++++++++++++++++++++++++++++
>> +--------------------
>> >  1 file changed, 78 insertions(+), 50 deletions(-)
>> >
>> > diff --git a/target/mips/helper.c b/target/mips/helper.c
>> > index a2b6459..2411a2c 100644
>> > --- a/target/mips/helper.c
>> > +++ b/target/mips/helper.c
[...]
>> > @@ -130,8 +133,11 @@ static int is_seg_am_mapped(unsigned int am, bool eu, int mmu_idx)
>> >      int32_t adetlb_mask;
>> >
>> >      switch (mmu_idx) {
>> > -    case 3 /* ERL */:
>> > -        /* If EU is set, always unmapped */
>> > +    case 3:
>> > +        /*
>> > +         * ERL
>> > +         * If EU is set, always unmapped
>> > +         */
>> >          if (eu) {
>> >              return 0;
>> >          }
>>
>> This changes from the usual way we format switch case comments to an
>> unusual way.
>>
>> If you want to pursue this change, please put it in a separate patch,
>> so this one is really about fixing "errors and warnings reported by
>> 'checkpatch.pl -f'", as your commit message promises.
>>
>>
>
> Hi, Markus. Thank you for your response.
>
> There must be some misunderstanding here:
>
> The line:
>
>    case 3 /* ERL */:
>
> generates a checkpatch warning. I don't know why I would put it in a
> separate patch, if this patch is about fixing checkpatch warnings. Please
> explain.

You're right; I misread the line you patch as

     case 3: /* ERL */

> Secondly, I don't see that this is a usual way we format switch statement.
> I found just several cases in the whole QEMU code base (and you claimed in
> previous comments that there are thousands).
>
> I am just guessing that you somehow mixed this line with the line:
>
>    case 3: /* ERL */
>
> that would have not generated checkpatch warning.

You guessed correctly.  Telling me right away that my remark doesn't
make sense to you would've helped :)

The pattern

    case VALUE: /* comment on VALUE */

is common: >8000 instances.

The pattern

    case VALUE /* comment on VALUE */:

is uncommon: <20 instances.  I agree with cleaning it up.

However, I find the common pattern applied here

    case 3: /* ERL */
        /* If EU is set, always unmapped */
        if (eu) {
            return 0;
        }

more readable than the unusual (to my eyes)

    case 3:
        /*
         * ERL
         * If EU is set, always unmapped
         */
        if (eu) {
            return 0;
        }

The first line of the comment applies to the value preceding it, the
second to the code following it.  Making these connections doesn't
exactly take genius, but neither is it effortless.

Nice and consistent coding style is all about reducing the effort of
reading code.

For what it's worth, the pattern

    case VALUE: /* comment on VALUE */
        /* comment on CODE */
        CODE

occurs almost 300 times.

> I don't see any reason to change this patch. Please let me know it you
> still think I should do something else. And you are welcome to analyse any
> patches of mine.

Please consider keeping two separate comments, i.e. just move the colon
to its usual place.

Thanks!
Aleksandar Markovic Oct. 15, 2019, 12:17 p.m. UTC | #4
>
>
>
Markus wrote:


> However, I find the common pattern applied here
>
>     case 3: /* ERL */
>         /* If EU is set, always unmapped */
>         if (eu) {
>             return 0;
>         }
>
> more readable ...


>
>
 I am going to do it this way in v5.

Thanks,
Aleksandar



> ... than the unusual (to my eyes)
>
>     case 3:
>         /*
>          * ERL
>          * If EU is set, always unmapped
>          */
>         if (eu) {
>             return 0;
>         }
>
> The first line of the comment applies to the value preceding it, the
> second to the code following it.  Making these connections doesn't
> exactly take genius, but neither is it effortless.
>
> Nice and consistent coding style is all about reducing the effort of
> reading code.
>
> For what it's worth, the pattern
>
>     case VALUE: /* comment on VALUE */
>         /* comment on CODE */
>         CODE
>
> occurs almost 300 times.
>
> > I don't see any reason to change this patch. Please let me know it you
> > still think I should do something else. And you are welcome to analyse
> any
> > patches of mine.
>
> Please consider keeping two separate comments, i.e. just move the colon
> to its usual place.
>
> Thanks!
>
diff mbox series

Patch

diff --git a/target/mips/helper.c b/target/mips/helper.c
index a2b6459..2411a2c 100644
--- a/target/mips/helper.c
+++ b/target/mips/helper.c
@@ -39,8 +39,8 @@  enum {
 #if !defined(CONFIG_USER_ONLY)
 
 /* no MMU emulation */
-int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
-                        target_ulong address, int rw, int access_type)
+int no_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
+                       target_ulong address, int rw, int access_type)
 {
     *physical = address;
     *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
@@ -48,26 +48,28 @@  int no_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
 }
 
 /* fixed mapping MMU emulation */
-int fixed_mmu_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
-                           target_ulong address, int rw, int access_type)
+int fixed_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
+                          target_ulong address, int rw, int access_type)
 {
     if (address <= (int32_t)0x7FFFFFFFUL) {
-        if (!(env->CP0_Status & (1 << CP0St_ERL)))
+        if (!(env->CP0_Status & (1 << CP0St_ERL))) {
             *physical = address + 0x40000000UL;
-        else
+        } else {
             *physical = address;
-    } else if (address <= (int32_t)0xBFFFFFFFUL)
+        }
+    } else if (address <= (int32_t)0xBFFFFFFFUL) {
         *physical = address & 0x1FFFFFFF;
-    else
+    } else {
         *physical = address;
+    }
 
     *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
     return TLBRET_MATCH;
 }
 
 /* MIPS32/MIPS64 R4000-style MMU emulation */
-int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
-                     target_ulong address, int rw, int access_type)
+int r4k_map_address(CPUMIPSState *env, hwaddr *physical, int *prot,
+                    target_ulong address, int rw, int access_type)
 {
     uint16_t ASID = env->CP0_EntryHi & env->CP0_EntryHi_ASID_mask;
     int i;
@@ -99,8 +101,9 @@  int r4k_map_address (CPUMIPSState *env, hwaddr *physical, int *prot,
             if (rw != MMU_DATA_STORE || (n ? tlb->D1 : tlb->D0)) {
                 *physical = tlb->PFN[n] | (address & (mask >> 1));
                 *prot = PAGE_READ;
-                if (n ? tlb->D1 : tlb->D0)
+                if (n ? tlb->D1 : tlb->D0) {
                     *prot |= PAGE_WRITE;
+                }
                 if (!(n ? tlb->XI1 : tlb->XI0)) {
                     *prot |= PAGE_EXEC;
                 }
@@ -130,8 +133,11 @@  static int is_seg_am_mapped(unsigned int am, bool eu, int mmu_idx)
     int32_t adetlb_mask;
 
     switch (mmu_idx) {
-    case 3 /* ERL */:
-        /* If EU is set, always unmapped */
+    case 3:
+        /*
+         * ERL
+         * If EU is set, always unmapped
+         */
         if (eu) {
             return 0;
         }
@@ -204,7 +210,7 @@  static int get_segctl_physical_address(CPUMIPSState *env, hwaddr *physical,
                                     pa & ~(hwaddr)segmask);
 }
 
-static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
+static int get_physical_address(CPUMIPSState *env, hwaddr *physical,
                                 int *prot, target_ulong real_address,
                                 int rw, int access_type, int mmu_idx)
 {
@@ -252,14 +258,15 @@  static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
         } else {
             segctl = env->CP0_SegCtl2 >> 16;
         }
-        ret = get_segctl_physical_address(env, physical, prot, real_address, rw,
-                                          access_type, mmu_idx, segctl,
-                                          0x3FFFFFFF);
+        ret = get_segctl_physical_address(env, physical, prot,
+                                          real_address, rw, access_type,
+                                          mmu_idx, segctl, 0x3FFFFFFF);
 #if defined(TARGET_MIPS64)
     } else if (address < 0x4000000000000000ULL) {
         /* xuseg */
         if (UX && address <= (0x3FFFFFFFFFFFFFFFULL & env->SEGMask)) {
-            ret = env->tlb->map_address(env, physical, prot, real_address, rw, access_type);
+            ret = env->tlb->map_address(env, physical, prot,
+                                        real_address, rw, access_type);
         } else {
             ret = TLBRET_BADADDR;
         }
@@ -267,7 +274,8 @@  static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
         /* xsseg */
         if ((supervisor_mode || kernel_mode) &&
             SX && address <= (0x7FFFFFFFFFFFFFFFULL & env->SEGMask)) {
-            ret = env->tlb->map_address(env, physical, prot, real_address, rw, access_type);
+            ret = env->tlb->map_address(env, physical, prot,
+                                        real_address, rw, access_type);
         } else {
             ret = TLBRET_BADADDR;
         }
@@ -307,7 +315,8 @@  static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
         /* xkseg */
         if (kernel_mode && KX &&
             address <= (0xFFFFFFFF7FFFFFFFULL & env->SEGMask)) {
-            ret = env->tlb->map_address(env, physical, prot, real_address, rw, access_type);
+            ret = env->tlb->map_address(env, physical, prot,
+                                        real_address, rw, access_type);
         } else {
             ret = TLBRET_BADADDR;
         }
@@ -328,8 +337,10 @@  static int get_physical_address (CPUMIPSState *env, hwaddr *physical,
                                           access_type, mmu_idx,
                                           env->CP0_SegCtl0 >> 16, 0x1FFFFFFF);
     } else {
-        /* kseg3 */
-        /* XXX: debug segment is not emulated */
+        /*
+         * kseg3
+         * XXX: debug segment is not emulated
+         */
         ret = get_segctl_physical_address(env, physical, prot, real_address, rw,
                                           access_type, mmu_idx,
                                           env->CP0_SegCtl0, 0x1FFFFFFF);
@@ -515,9 +526,9 @@  static void raise_mmu_exception(CPUMIPSState *env, target_ulong address,
 #if defined(TARGET_MIPS64)
     env->CP0_EntryHi &= env->SEGMask;
     env->CP0_XContext =
-        /* PTEBase */   (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) |
-        /* R */         (extract64(address, 62, 2) << (env->SEGBITS - 9)) |
-        /* BadVPN2 */   (extract64(address, 13, env->SEGBITS - 13) << 4);
+        (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) | /* PTEBase */
+        (extract64(address, 62, 2) << (env->SEGBITS - 9)) |     /* R       */
+        (extract64(address, 13, env->SEGBITS - 13) << 4);       /* BadVPN2 */
 #endif
     cs->exception_index = exception;
     env->error_code = error_code;
@@ -945,7 +956,8 @@  bool mips_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 }
 
 #ifndef CONFIG_USER_ONLY
-hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address, int rw)
+hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address,
+                                  int rw)
 {
     hwaddr physical;
     int prot;
@@ -1005,7 +1017,7 @@  static const char * const excp_names[EXCP_LAST + 1] = {
 };
 #endif
 
-target_ulong exception_resume_pc (CPUMIPSState *env)
+target_ulong exception_resume_pc(CPUMIPSState *env)
 {
     target_ulong bad_pc;
     target_ulong isa_mode;
@@ -1013,8 +1025,10 @@  target_ulong exception_resume_pc (CPUMIPSState *env)
     isa_mode = !!(env->hflags & MIPS_HFLAG_M16);
     bad_pc = env->active_tc.PC | isa_mode;
     if (env->hflags & MIPS_HFLAG_BMASK) {
-        /* If the exception was raised from a delay slot, come back to
-           the jump.  */
+        /*
+         * If the exception was raised from a delay slot, come back to
+         * the jump.
+         */
         bad_pc -= (env->hflags & MIPS_HFLAG_B16 ? 2 : 4);
     }
 
@@ -1022,14 +1036,14 @@  target_ulong exception_resume_pc (CPUMIPSState *env)
 }
 
 #if !defined(CONFIG_USER_ONLY)
-static void set_hflags_for_handler (CPUMIPSState *env)
+static void set_hflags_for_handler(CPUMIPSState *env)
 {
     /* Exception handlers are entered in 32-bit mode.  */
     env->hflags &= ~(MIPS_HFLAG_M16);
     /* ...except that microMIPS lets you choose.  */
     if (env->insn_flags & ASE_MICROMIPS) {
-        env->hflags |= (!!(env->CP0_Config3
-                           & (1 << CP0C3_ISA_ON_EXC))
+        env->hflags |= (!!(env->CP0_Config3 &
+                           (1 << CP0C3_ISA_ON_EXC))
                         << MIPS_HFLAG_M16_SHIFT);
     }
 }
@@ -1096,10 +1110,12 @@  void mips_cpu_do_interrupt(CPUState *cs)
     switch (cs->exception_index) {
     case EXCP_DSS:
         env->CP0_Debug |= 1 << CP0DB_DSS;
-        /* Debug single step cannot be raised inside a delay slot and
-           resume will always occur on the next instruction
-           (but we assume the pc has always been updated during
-           code translation). */
+        /*
+         * Debug single step cannot be raised inside a delay slot and
+         * resume will always occur on the next instruction
+         * (but we assume the pc has always been updated during
+         * code translation).
+         */
         env->CP0_DEPC = env->active_tc.PC | !!(env->hflags & MIPS_HFLAG_M16);
         goto enter_debug_mode;
     case EXCP_DINT:
@@ -1111,7 +1127,8 @@  void mips_cpu_do_interrupt(CPUState *cs)
     case EXCP_DBp:
         env->CP0_Debug |= 1 << CP0DB_DBp;
         /* Setup DExcCode - SDBBP instruction */
-        env->CP0_Debug = (env->CP0_Debug & ~(0x1fULL << CP0DB_DEC)) | 9 << CP0DB_DEC;
+        env->CP0_Debug = (env->CP0_Debug & ~(0x1fULL << CP0DB_DEC)) |
+                         (9 << CP0DB_DEC);
         goto set_DEPC;
     case EXCP_DDBS:
         env->CP0_Debug |= 1 << CP0DB_DDBS;
@@ -1132,8 +1149,9 @@  void mips_cpu_do_interrupt(CPUState *cs)
         env->hflags |= MIPS_HFLAG_DM | MIPS_HFLAG_CP0;
         env->hflags &= ~(MIPS_HFLAG_KSU);
         /* EJTAG probe trap enable is not implemented... */
-        if (!(env->CP0_Status & (1 << CP0St_EXL)))
+        if (!(env->CP0_Status & (1 << CP0St_EXL))) {
             env->CP0_Cause &= ~(1U << CP0Ca_BD);
+        }
         env->active_tc.PC = env->exception_base + 0x480;
         set_hflags_for_handler(env);
         break;
@@ -1159,8 +1177,9 @@  void mips_cpu_do_interrupt(CPUState *cs)
         }
         env->hflags |= MIPS_HFLAG_CP0;
         env->hflags &= ~(MIPS_HFLAG_KSU);
-        if (!(env->CP0_Status & (1 << CP0St_EXL)))
+        if (!(env->CP0_Status & (1 << CP0St_EXL))) {
             env->CP0_Cause &= ~(1U << CP0Ca_BD);
+        }
         env->active_tc.PC = env->exception_base;
         set_hflags_for_handler(env);
         break;
@@ -1176,12 +1195,16 @@  void mips_cpu_do_interrupt(CPUState *cs)
                 uint32_t pending = (env->CP0_Cause & CP0Ca_IP_mask) >> CP0Ca_IP;
 
                 if (env->CP0_Config3 & (1 << CP0C3_VEIC)) {
-                    /* For VEIC mode, the external interrupt controller feeds
-                     * the vector through the CP0Cause IP lines.  */
+                    /*
+                     * For VEIC mode, the external interrupt controller feeds
+                     * the vector through the CP0Cause IP lines.
+                     */
                     vector = pending;
                 } else {
-                    /* Vectored Interrupts
-                     * Mask with Status.IM7-IM0 to get enabled interrupts. */
+                    /*
+                     * Vectored Interrupts
+                     * Mask with Status.IM7-IM0 to get enabled interrupts.
+                     */
                     pending &= (env->CP0_Status >> CP0St_IM) & 0xff;
                     /* Find the highest-priority interrupt. */
                     while (pending >>= 1) {
@@ -1354,7 +1377,8 @@  void mips_cpu_do_interrupt(CPUState *cs)
 
         env->active_tc.PC += offset;
         set_hflags_for_handler(env);
-        env->CP0_Cause = (env->CP0_Cause & ~(0x1f << CP0Ca_EC)) | (cause << CP0Ca_EC);
+        env->CP0_Cause = (env->CP0_Cause & ~(0x1f << CP0Ca_EC)) |
+                         (cause << CP0Ca_EC);
         break;
     default:
         abort();
@@ -1390,7 +1414,7 @@  bool mips_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
 }
 
 #if !defined(CONFIG_USER_ONLY)
-void r4k_invalidate_tlb (CPUMIPSState *env, int idx, int use_extra)
+void r4k_invalidate_tlb(CPUMIPSState *env, int idx, int use_extra)
 {
     CPUState *cs = env_cpu(env);
     r4k_tlb_t *tlb;
@@ -1400,16 +1424,20 @@  void r4k_invalidate_tlb (CPUMIPSState *env, int idx, int use_extra)
     target_ulong mask;
 
     tlb = &env->tlb->mmu.r4k.tlb[idx];
-    /* The qemu TLB is flushed when the ASID changes, so no need to
-       flush these entries again.  */
+    /*
+     * The qemu TLB is flushed when the ASID changes, so no need to
+     * flush these entries again.
+     */
     if (tlb->G == 0 && tlb->ASID != ASID) {
         return;
     }
 
     if (use_extra && env->tlb->tlb_in_use < MIPS_TLB_MAX) {
-        /* For tlbwr, we can shadow the discarded entry into
-           a new (fake) TLB entry, as long as the guest can not
-           tell that it's there.  */
+        /*
+         * For tlbwr, we can shadow the discarded entry into
+         * a new (fake) TLB entry, as long as the guest can not
+         * tell that it's there.
+         */
         env->tlb->mmu.r4k.tlb[env->tlb->tlb_in_use] = *tlb;
         env->tlb->tlb_in_use++;
         return;