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* [Qemu-devel] [PATCH] es1370: simplify MemoryRegionOps
@ 2018-08-01 17:06 Paolo Bonzini
  2018-08-01 17:27 ` Philippe Mathieu-Daudé
  0 siblings, 1 reply; 3+ messages in thread
From: Paolo Bonzini @ 2018-08-01 17:06 UTC (permalink / raw)
  To: qemu-devel

Use the automatic subregister extraction from the memory API, and avoid
that Coverity complains about missing fallthrough comments.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/audio/es1370.c | 235 +++++-----------------------------------------
 1 file changed, 25 insertions(+), 210 deletions(-)

diff --git a/hw/audio/es1370.c b/hw/audio/es1370.c
index 59cf252754..dd75c9e8f5 100644
--- a/hw/audio/es1370.c
+++ b/hw/audio/es1370.c
@@ -474,82 +474,7 @@ static inline uint32_t es1370_fixup (ES1370State *s, uint32_t addr)
     return addr;
 }
 
-static void es1370_writeb(void *opaque, uint32_t addr, uint32_t val)
-{
-    ES1370State *s = opaque;
-    uint32_t shift, mask;
-
-    addr = es1370_fixup (s, addr);
-
-    switch (addr) {
-    case ES1370_REG_CONTROL:
-    case ES1370_REG_CONTROL + 1:
-    case ES1370_REG_CONTROL + 2:
-    case ES1370_REG_CONTROL + 3:
-        shift = (addr - ES1370_REG_CONTROL) << 3;
-        mask = 0xff << shift;
-        val = (s->ctl & ~mask) | ((val & 0xff) << shift);
-        es1370_update_voices (s, val, s->sctl);
-        print_ctl (val);
-        break;
-    case ES1370_REG_MEMPAGE:
-        s->mempage = val;
-        break;
-    case ES1370_REG_SERIAL_CONTROL:
-    case ES1370_REG_SERIAL_CONTROL + 1:
-    case ES1370_REG_SERIAL_CONTROL + 2:
-    case ES1370_REG_SERIAL_CONTROL + 3:
-        shift = (addr - ES1370_REG_SERIAL_CONTROL) << 3;
-        mask = 0xff << shift;
-        val = (s->sctl & ~mask) | ((val & 0xff) << shift);
-        es1370_maybe_lower_irq (s, val);
-        es1370_update_voices (s, s->ctl, val);
-        print_sctl (val);
-        break;
-    default:
-        lwarn ("writeb %#x <- %#x\n", addr, val);
-        break;
-    }
-}
-
-static void es1370_writew(void *opaque, uint32_t addr, uint32_t val)
-{
-    ES1370State *s = opaque;
-    addr = es1370_fixup (s, addr);
-    uint32_t shift, mask;
-    struct chan *d = &s->chan[0];
-
-    switch (addr) {
-    case ES1370_REG_CODEC:
-        dolog ("ignored codec write address %#x, data %#x\n",
-               (val >> 8) & 0xff, val & 0xff);
-        s->codec = val;
-        break;
-
-    case ES1370_REG_CONTROL:
-    case ES1370_REG_CONTROL + 2:
-        shift = (addr != ES1370_REG_CONTROL) << 4;
-        mask = 0xffff << shift;
-        val = (s->ctl & ~mask) | ((val & 0xffff) << shift);
-        es1370_update_voices (s, val, s->sctl);
-        print_ctl (val);
-        break;
-
-    case ES1370_REG_ADC_SCOUNT:
-        d++;
-    case ES1370_REG_DAC2_SCOUNT:
-        d++;
-    case ES1370_REG_DAC1_SCOUNT:
-        d->scount = (d->scount & ~0xffff) | (val & 0xffff);
-        break;
-
-    default:
-        lwarn ("writew %#x <- %#x\n", addr, val);
-        break;
-    }
-}
-
-static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
+static void es1370_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
 {
     ES1370State *s = opaque;
     struct chan *d = &s->chan[0];
@@ -572,21 +497,19 @@ static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
         print_sctl (val);
         break;
 
-    case ES1370_REG_ADC_SCOUNT:
-        d++;
-    case ES1370_REG_DAC2_SCOUNT:
-        d++;
     case ES1370_REG_DAC1_SCOUNT:
+    case ES1370_REG_DAC2_SCOUNT:
+    case ES1370_REG_ADC_SCOUNT:
+        d += (addr - ES1370_REG_DAC1_SCOUNT) >> 2;
         d->scount = (val & 0xffff) | (d->scount & ~0xffff);
         ldebug ("chan %td CURR_SAMP_CT %d, SAMP_CT %d\n",
                 d - &s->chan[0], val >> 16, (val & 0xffff));
         break;
 
-    case ES1370_REG_ADC_FRAMEADR:
-        d++;
-    case ES1370_REG_DAC2_FRAMEADR:
-        d++;
     case ES1370_REG_DAC1_FRAMEADR:
+    case ES1370_REG_DAC2_FRAMEADR:
+    case ES1370_REG_ADC_FRAMEADR:
+        d += (addr - ES1370_REG_DAC1_FRAMEADR) >> 3;
         d->frame_addr = val;
         ldebug ("chan %td frame address %#x\n", d - &s->chan[0], val);
         break;
@@ -598,11 +521,10 @@ static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
         lwarn ("writing to phantom frame address %#x\n", val);
         break;
 
-    case ES1370_REG_ADC_FRAMECNT:
-        d++;
-    case ES1370_REG_DAC2_FRAMECNT:
-        d++;
     case ES1370_REG_DAC1_FRAMECNT:
+    case ES1370_REG_DAC2_FRAMECNT:
+    case ES1370_REG_ADC_FRAMECNT:
+        d += (addr - ES1370_REG_DAC1_FRAMECNT) >> 3;
         d->frame_cnt = val;
         d->leftover = 0;
         ldebug ("chan %td frame count %d, buffer size %d\n",
@@ -615,84 +537,7 @@ static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
     }
 }
 
-static uint32_t es1370_readb(void *opaque, uint32_t addr)
-{
-    ES1370State *s = opaque;
-    uint32_t val;
-
-    addr = es1370_fixup (s, addr);
-
-    switch (addr) {
-    case 0x1b:                  /* Legacy */
-        lwarn ("Attempt to read from legacy register\n");
-        val = 5;
-        break;
-    case ES1370_REG_MEMPAGE:
-        val = s->mempage;
-        break;
-    case ES1370_REG_CONTROL + 0:
-    case ES1370_REG_CONTROL + 1:
-    case ES1370_REG_CONTROL + 2:
-    case ES1370_REG_CONTROL + 3:
-        val = s->ctl >> ((addr - ES1370_REG_CONTROL) << 3);
-        break;
-    case ES1370_REG_STATUS + 0:
-    case ES1370_REG_STATUS + 1:
-    case ES1370_REG_STATUS + 2:
-    case ES1370_REG_STATUS + 3:
-        val = s->status >> ((addr - ES1370_REG_STATUS) << 3);
-        break;
-    default:
-        val = ~0;
-        lwarn ("readb %#x -> %#x\n", addr, val);
-        break;
-    }
-    return val;
-}
-
-static uint32_t es1370_readw(void *opaque, uint32_t addr)
-{
-    ES1370State *s = opaque;
-    struct chan *d = &s->chan[0];
-    uint32_t val;
-
-    addr = es1370_fixup (s, addr);
-
-    switch (addr) {
-    case ES1370_REG_ADC_SCOUNT + 2:
-        d++;
-    case ES1370_REG_DAC2_SCOUNT + 2:
-        d++;
-    case ES1370_REG_DAC1_SCOUNT + 2:
-        val = d->scount >> 16;
-        break;
-
-    case ES1370_REG_ADC_FRAMECNT:
-        d++;
-    case ES1370_REG_DAC2_FRAMECNT:
-        d++;
-    case ES1370_REG_DAC1_FRAMECNT:
-        val = d->frame_cnt & 0xffff;
-        break;
-
-    case ES1370_REG_ADC_FRAMECNT + 2:
-        d++;
-    case ES1370_REG_DAC2_FRAMECNT + 2:
-        d++;
-    case ES1370_REG_DAC1_FRAMECNT + 2:
-        val = d->frame_cnt >> 16;
-        break;
-
-    default:
-        val = ~0;
-        lwarn ("readw %#x -> %#x\n", addr, val);
-        break;
-    }
-
-    return val;
-}
-
-static uint32_t es1370_readl(void *opaque, uint32_t addr)
+static uint64_t es1370_read(void *opaque, hwaddr addr, unsigned size)
 {
     ES1370State *s = opaque;
     uint32_t val;
@@ -717,11 +562,10 @@ static uint32_t es1370_readl(void *opaque, uint32_t addr)
         val = s->sctl;
         break;
 
-    case ES1370_REG_ADC_SCOUNT:
-        d++;
-    case ES1370_REG_DAC2_SCOUNT:
-        d++;
     case ES1370_REG_DAC1_SCOUNT:
+    case ES1370_REG_DAC2_SCOUNT:
+    case ES1370_REG_ADC_SCOUNT:
+        d += (addr - ES1370_REG_DAC1_SCOUNT) >> 2;
         val = d->scount;
 #ifdef DEBUG_ES1370
         {
@@ -735,11 +579,10 @@ static uint32_t es1370_readl(void *opaque, uint32_t addr)
 #endif
         break;
 
-    case ES1370_REG_ADC_FRAMECNT:
-        d++;
-    case ES1370_REG_DAC2_FRAMECNT:
-        d++;
     case ES1370_REG_DAC1_FRAMECNT:
+    case ES1370_REG_DAC2_FRAMECNT:
+    case ES1370_REG_ADC_FRAMECNT:
+        d += (addr - ES1370_REG_DAC1_FRAMECNT) >> 3;
         val = d->frame_cnt;
 #ifdef DEBUG_ES1370
         {
@@ -753,11 +596,10 @@ static uint32_t es1370_readl(void *opaque, uint32_t addr)
 #endif
         break;
 
-    case ES1370_REG_ADC_FRAMEADR:
-        d++;
-    case ES1370_REG_DAC2_FRAMEADR:
-        d++;
     case ES1370_REG_DAC1_FRAMEADR:
+    case ES1370_REG_DAC2_FRAMEADR:
+    case ES1370_REG_ADC_FRAMEADR:
+        d += (addr - ES1370_REG_DAC1_FRAMEADR) >> 3;
         val = d->frame_addr;
         break;
 
@@ -908,44 +750,17 @@ static void es1370_adc_callback (void *opaque, int avail)
     es1370_run_channel (s, ADC_CHANNEL, avail);
 }
 
-static uint64_t es1370_read(void *opaque, hwaddr addr,
-                            unsigned size)
-{
-    switch (size) {
-    case 1:
-        return es1370_readb(opaque, addr);
-    case 2:
-        return es1370_readw(opaque, addr);
-    case 4:
-        return es1370_readl(opaque, addr);
-    default:
-        return -1;
-    }
-}
-
-static void es1370_write(void *opaque, hwaddr addr, uint64_t val,
-                      unsigned size)
-{
-    switch (size) {
-    case 1:
-        es1370_writeb(opaque, addr, val);
-        break;
-    case 2:
-        es1370_writew(opaque, addr, val);
-        break;
-    case 4:
-        es1370_writel(opaque, addr, val);
-        break;
-    }
-}
-
 static const MemoryRegionOps es1370_io_ops = {
     .read = es1370_read,
     .write = es1370_write,
-    .impl = {
+    .valid = {
         .min_access_size = 1,
         .max_access_size = 4,
     },
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-- 
2.17.1

^ permalink raw reply related	[flat|nested] 3+ messages in thread

* Re: [Qemu-devel] [PATCH] es1370: simplify MemoryRegionOps
  2018-08-01 17:06 [Qemu-devel] [PATCH] es1370: simplify MemoryRegionOps Paolo Bonzini
@ 2018-08-01 17:27 ` Philippe Mathieu-Daudé
  2018-08-02  8:18   ` Paolo Bonzini
  0 siblings, 1 reply; 3+ messages in thread
From: Philippe Mathieu-Daudé @ 2018-08-01 17:27 UTC (permalink / raw)
  To: Paolo Bonzini; +Cc: qemu-devel

On 08/01/2018 02:06 PM, Paolo Bonzini wrote:
> Use the automatic subregister extraction from the memory API, and avoid
> that Coverity complains about missing fallthrough comments.
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  hw/audio/es1370.c | 235 +++++-----------------------------------------
>  1 file changed, 25 insertions(+), 210 deletions(-)
> 
> diff --git a/hw/audio/es1370.c b/hw/audio/es1370.c
> index 59cf252754..dd75c9e8f5 100644
> --- a/hw/audio/es1370.c
> +++ b/hw/audio/es1370.c
> @@ -474,82 +474,7 @@ static inline uint32_t es1370_fixup (ES1370State *s, uint32_t addr)
>      return addr;
>  }
>  
> -static void es1370_writeb(void *opaque, uint32_t addr, uint32_t val)
> -{
> -    ES1370State *s = opaque;
> -    uint32_t shift, mask;
> -
> -    addr = es1370_fixup (s, addr);
> -
> -    switch (addr) {
> -    case ES1370_REG_CONTROL:
> -    case ES1370_REG_CONTROL + 1:
> -    case ES1370_REG_CONTROL + 2:
> -    case ES1370_REG_CONTROL + 3:
> -        shift = (addr - ES1370_REG_CONTROL) << 3;
> -        mask = 0xff << shift;
> -        val = (s->ctl & ~mask) | ((val & 0xff) << shift);
> -        es1370_update_voices (s, val, s->sctl);
> -        print_ctl (val);
> -        break;
> -    case ES1370_REG_MEMPAGE:
> -        s->mempage = val;
> -        break;
> -    case ES1370_REG_SERIAL_CONTROL:
> -    case ES1370_REG_SERIAL_CONTROL + 1:
> -    case ES1370_REG_SERIAL_CONTROL + 2:
> -    case ES1370_REG_SERIAL_CONTROL + 3:
> -        shift = (addr - ES1370_REG_SERIAL_CONTROL) << 3;
> -        mask = 0xff << shift;
> -        val = (s->sctl & ~mask) | ((val & 0xff) << shift);

I guess this code bypass the access_with_adjusted_size() big-endian
bug... But I have no idea if this devices on BE platforms, so for this
nice cleanup:
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> -        es1370_maybe_lower_irq (s, val);
> -        es1370_update_voices (s, s->ctl, val);
> -        print_sctl (val);
> -        break;
> -    default:
> -        lwarn ("writeb %#x <- %#x\n", addr, val);
> -        break;
> -    }
> -}
> -
> -static void es1370_writew(void *opaque, uint32_t addr, uint32_t val)
> -{
> -    ES1370State *s = opaque;
> -    addr = es1370_fixup (s, addr);
> -    uint32_t shift, mask;
> -    struct chan *d = &s->chan[0];
> -
> -    switch (addr) {
> -    case ES1370_REG_CODEC:
> -        dolog ("ignored codec write address %#x, data %#x\n",
> -               (val >> 8) & 0xff, val & 0xff);
> -        s->codec = val;
> -        break;
> -
> -    case ES1370_REG_CONTROL:
> -    case ES1370_REG_CONTROL + 2:
> -        shift = (addr != ES1370_REG_CONTROL) << 4;
> -        mask = 0xffff << shift;
> -        val = (s->ctl & ~mask) | ((val & 0xffff) << shift);
> -        es1370_update_voices (s, val, s->sctl);
> -        print_ctl (val);
> -        break;
> -
> -    case ES1370_REG_ADC_SCOUNT:
> -        d++;
> -    case ES1370_REG_DAC2_SCOUNT:
> -        d++;
> -    case ES1370_REG_DAC1_SCOUNT:
> -        d->scount = (d->scount & ~0xffff) | (val & 0xffff);
> -        break;
> -
> -    default:
> -        lwarn ("writew %#x <- %#x\n", addr, val);
> -        break;
> -    }
> -}
> -
> -static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
> +static void es1370_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
>  {
>      ES1370State *s = opaque;
>      struct chan *d = &s->chan[0];
> @@ -572,21 +497,19 @@ static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
>          print_sctl (val);
>          break;
>  
> -    case ES1370_REG_ADC_SCOUNT:
> -        d++;
> -    case ES1370_REG_DAC2_SCOUNT:
> -        d++;
>      case ES1370_REG_DAC1_SCOUNT:
> +    case ES1370_REG_DAC2_SCOUNT:
> +    case ES1370_REG_ADC_SCOUNT:
> +        d += (addr - ES1370_REG_DAC1_SCOUNT) >> 2;
>          d->scount = (val & 0xffff) | (d->scount & ~0xffff);
>          ldebug ("chan %td CURR_SAMP_CT %d, SAMP_CT %d\n",
>                  d - &s->chan[0], val >> 16, (val & 0xffff));
>          break;
>  
> -    case ES1370_REG_ADC_FRAMEADR:
> -        d++;
> -    case ES1370_REG_DAC2_FRAMEADR:
> -        d++;
>      case ES1370_REG_DAC1_FRAMEADR:
> +    case ES1370_REG_DAC2_FRAMEADR:
> +    case ES1370_REG_ADC_FRAMEADR:
> +        d += (addr - ES1370_REG_DAC1_FRAMEADR) >> 3;
>          d->frame_addr = val;
>          ldebug ("chan %td frame address %#x\n", d - &s->chan[0], val);
>          break;
> @@ -598,11 +521,10 @@ static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
>          lwarn ("writing to phantom frame address %#x\n", val);
>          break;
>  
> -    case ES1370_REG_ADC_FRAMECNT:
> -        d++;
> -    case ES1370_REG_DAC2_FRAMECNT:
> -        d++;
>      case ES1370_REG_DAC1_FRAMECNT:
> +    case ES1370_REG_DAC2_FRAMECNT:
> +    case ES1370_REG_ADC_FRAMECNT:
> +        d += (addr - ES1370_REG_DAC1_FRAMECNT) >> 3;
>          d->frame_cnt = val;
>          d->leftover = 0;
>          ldebug ("chan %td frame count %d, buffer size %d\n",
> @@ -615,84 +537,7 @@ static void es1370_writel(void *opaque, uint32_t addr, uint32_t val)
>      }
>  }
>  
> -static uint32_t es1370_readb(void *opaque, uint32_t addr)
> -{
> -    ES1370State *s = opaque;
> -    uint32_t val;
> -
> -    addr = es1370_fixup (s, addr);
> -
> -    switch (addr) {
> -    case 0x1b:                  /* Legacy */
> -        lwarn ("Attempt to read from legacy register\n");
> -        val = 5;
> -        break;
> -    case ES1370_REG_MEMPAGE:
> -        val = s->mempage;
> -        break;
> -    case ES1370_REG_CONTROL + 0:
> -    case ES1370_REG_CONTROL + 1:
> -    case ES1370_REG_CONTROL + 2:
> -    case ES1370_REG_CONTROL + 3:
> -        val = s->ctl >> ((addr - ES1370_REG_CONTROL) << 3);
> -        break;
> -    case ES1370_REG_STATUS + 0:
> -    case ES1370_REG_STATUS + 1:
> -    case ES1370_REG_STATUS + 2:
> -    case ES1370_REG_STATUS + 3:
> -        val = s->status >> ((addr - ES1370_REG_STATUS) << 3);
> -        break;
> -    default:
> -        val = ~0;
> -        lwarn ("readb %#x -> %#x\n", addr, val);
> -        break;
> -    }
> -    return val;
> -}
> -
> -static uint32_t es1370_readw(void *opaque, uint32_t addr)
> -{
> -    ES1370State *s = opaque;
> -    struct chan *d = &s->chan[0];
> -    uint32_t val;
> -
> -    addr = es1370_fixup (s, addr);
> -
> -    switch (addr) {
> -    case ES1370_REG_ADC_SCOUNT + 2:
> -        d++;
> -    case ES1370_REG_DAC2_SCOUNT + 2:
> -        d++;
> -    case ES1370_REG_DAC1_SCOUNT + 2:
> -        val = d->scount >> 16;
> -        break;
> -
> -    case ES1370_REG_ADC_FRAMECNT:
> -        d++;
> -    case ES1370_REG_DAC2_FRAMECNT:
> -        d++;
> -    case ES1370_REG_DAC1_FRAMECNT:
> -        val = d->frame_cnt & 0xffff;
> -        break;
> -
> -    case ES1370_REG_ADC_FRAMECNT + 2:
> -        d++;
> -    case ES1370_REG_DAC2_FRAMECNT + 2:
> -        d++;
> -    case ES1370_REG_DAC1_FRAMECNT + 2:
> -        val = d->frame_cnt >> 16;
> -        break;
> -
> -    default:
> -        val = ~0;
> -        lwarn ("readw %#x -> %#x\n", addr, val);
> -        break;
> -    }
> -
> -    return val;
> -}
> -
> -static uint32_t es1370_readl(void *opaque, uint32_t addr)
> +static uint64_t es1370_read(void *opaque, hwaddr addr, unsigned size)
>  {
>      ES1370State *s = opaque;
>      uint32_t val;
> @@ -717,11 +562,10 @@ static uint32_t es1370_readl(void *opaque, uint32_t addr)
>          val = s->sctl;
>          break;
>  
> -    case ES1370_REG_ADC_SCOUNT:
> -        d++;
> -    case ES1370_REG_DAC2_SCOUNT:
> -        d++;
>      case ES1370_REG_DAC1_SCOUNT:
> +    case ES1370_REG_DAC2_SCOUNT:
> +    case ES1370_REG_ADC_SCOUNT:
> +        d += (addr - ES1370_REG_DAC1_SCOUNT) >> 2;
>          val = d->scount;
>  #ifdef DEBUG_ES1370
>          {
> @@ -735,11 +579,10 @@ static uint32_t es1370_readl(void *opaque, uint32_t addr)
>  #endif
>          break;
>  
> -    case ES1370_REG_ADC_FRAMECNT:
> -        d++;
> -    case ES1370_REG_DAC2_FRAMECNT:
> -        d++;
>      case ES1370_REG_DAC1_FRAMECNT:
> +    case ES1370_REG_DAC2_FRAMECNT:
> +    case ES1370_REG_ADC_FRAMECNT:
> +        d += (addr - ES1370_REG_DAC1_FRAMECNT) >> 3;
>          val = d->frame_cnt;
>  #ifdef DEBUG_ES1370
>          {
> @@ -753,11 +596,10 @@ static uint32_t es1370_readl(void *opaque, uint32_t addr)
>  #endif
>          break;
>  
> -    case ES1370_REG_ADC_FRAMEADR:
> -        d++;
> -    case ES1370_REG_DAC2_FRAMEADR:
> -        d++;
>      case ES1370_REG_DAC1_FRAMEADR:
> +    case ES1370_REG_DAC2_FRAMEADR:
> +    case ES1370_REG_ADC_FRAMEADR:
> +        d += (addr - ES1370_REG_DAC1_FRAMEADR) >> 3;
>          val = d->frame_addr;
>          break;
>  
> @@ -908,44 +750,17 @@ static void es1370_adc_callback (void *opaque, int avail)
>      es1370_run_channel (s, ADC_CHANNEL, avail);
>  }
>  
> -static uint64_t es1370_read(void *opaque, hwaddr addr,
> -                            unsigned size)
> -{
> -    switch (size) {
> -    case 1:
> -        return es1370_readb(opaque, addr);
> -    case 2:
> -        return es1370_readw(opaque, addr);
> -    case 4:
> -        return es1370_readl(opaque, addr);
> -    default:
> -        return -1;
> -    }
> -}
> -
> -static void es1370_write(void *opaque, hwaddr addr, uint64_t val,
> -                      unsigned size)
> -{
> -    switch (size) {
> -    case 1:
> -        es1370_writeb(opaque, addr, val);
> -        break;
> -    case 2:
> -        es1370_writew(opaque, addr, val);
> -        break;
> -    case 4:
> -        es1370_writel(opaque, addr, val);
> -        break;
> -    }
> -}
> -
>  static const MemoryRegionOps es1370_io_ops = {
>      .read = es1370_read,
>      .write = es1370_write,
> -    .impl = {
> +    .valid = {
>          .min_access_size = 1,
>          .max_access_size = 4,
>      },
> +    .impl = {
> +        .min_access_size = 4,
> +        .max_access_size = 4,
> +    },
>      .endianness = DEVICE_LITTLE_ENDIAN,
>  };
>  
> 

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [Qemu-devel] [PATCH] es1370: simplify MemoryRegionOps
  2018-08-01 17:27 ` Philippe Mathieu-Daudé
@ 2018-08-02  8:18   ` Paolo Bonzini
  0 siblings, 0 replies; 3+ messages in thread
From: Paolo Bonzini @ 2018-08-02  8:18 UTC (permalink / raw)
  To: Philippe Mathieu-Daudé; +Cc: qemu-devel

On 01/08/2018 19:27, Philippe Mathieu-Daudé wrote:
> I guess this code bypass the access_with_adjusted_size() big-endian
> bug... But I have no idea if this devices on BE platforms, so for this
> nice cleanup:
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

What is the big-endian bug, and why is tests/endianness-test.c not
detecting it?

Thanks,

Paolo

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-08-02  8:18 UTC | newest]

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2018-08-01 17:06 [Qemu-devel] [PATCH] es1370: simplify MemoryRegionOps Paolo Bonzini
2018-08-01 17:27 ` Philippe Mathieu-Daudé
2018-08-02  8:18   ` Paolo Bonzini

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