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memory: Refactor common shifting code from accessors

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Backports commit 3c754a9383ac70f316f1b98aec203182de250c42 from qemu
This commit is contained in:
Philippe Mathieu-Daudé 2018-10-04 04:36:58 -04:00 committed by Lioncash
parent 7f0b91c261
commit de28c93299
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 20 additions and 10 deletions
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qemu/memory.c
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@ -443,6 +443,20 @@ static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
}
}
static inline void memory_region_shift_read_access(uint64_t *value,
unsigned shift,
uint64_t mask,
uint64_t tmp)
{
*value |= (tmp & mask) << shift;
}
static inline uint64_t memory_region_shift_write_access(uint64_t *value,
unsigned shift,
uint64_t mask)
{
return (*value >> shift) & mask;
}
static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
hwaddr addr,
uint64_t *value,
@ -456,7 +470,7 @@ static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
// UNICORN: Commented out
//trace_memory_region_ops_read(mr, addr, tmp, size);
*value |= (tmp & mask) << shift;
memory_region_shift_read_access(value, shift, mask, tmp);
return MEMTX_OK;
}
@ -475,7 +489,7 @@ static MemTxResult memory_region_read_accessor(MemoryRegion *mr,
// qemu_flush_coalesced_mmio_buffer();
//}
tmp = mr->ops->read(mr->uc, mr->opaque, addr, size);
*value |= (tmp & mask) << shift;
memory_region_shift_read_access(value, shift, mask, tmp);
return MEMTX_OK;
}
@ -497,7 +511,7 @@ static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
r = mr->ops->read_with_attrs(mr->uc, mr->opaque, addr, &tmp, size, attrs);
// UNICORN: Commented out
//trace_memory_region_ops_read(mr, addr, tmp, size);
*value |= (tmp & mask) << shift;
memory_region_shift_read_access(value, shift, mask, tmp);
return r;
}
@ -509,9 +523,8 @@ static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
tmp = (*value >> shift) & mask;
mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
return MEMTX_OK;
}
@ -524,9 +537,8 @@ static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
tmp = (*value >> shift) & mask;
mr->ops->write(mr->uc, mr->opaque, addr, tmp, size);
return MEMTX_OK;
}
@ -539,14 +551,12 @@ static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
uint64_t mask,
MemTxAttrs attrs)
{
uint64_t tmp;
uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
// UNICORN: Commented out
//if (mr->flush_coalesced_mmio) {
// qemu_flush_coalesced_mmio_buffer();
//}
tmp = (*value >> shift) & mask;
// UNICORN: Commented out
//trace_memory_region_ops_write(mr, addr, tmp, size);
return mr->ops->write_with_attrs(mr->uc, mr->opaque, addr, tmp, size, attrs);
}