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register: fix incorrect read mask

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The register_read() and register_write() functions expect a bitmask argument.
To avoid duplicated code, a new inlined function register_enabled_mask() is
introduced.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Philippe Mathieu-Daudé 2017-02-14 19:55:35 -03:00 committed by Michael Tokarev
parent 6048018ef6
commit 4729b3a41d
1 changed files with 15 additions and 6 deletions
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21
hw/core/register.c
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@ -59,6 +59,15 @@ static inline uint64_t register_read_val(RegisterInfo *reg)
return 0; /* unreachable */
}
static inline uint64_t register_enabled_mask(int data_size, unsigned size)
{
if (data_size < size) {
size = data_size;
}
return MAKE_64BIT_MASK(0, size * 8);
}
void register_write(RegisterInfo *reg, uint64_t val, uint64_t we,
const char *prefix, bool debug)
{
@ -192,11 +201,7 @@ void register_write_memory(void *opaque, hwaddr addr,
}
/* Generate appropriate write enable mask */
if (reg->data_size < size) {
we = MAKE_64BIT_MASK(0, reg->data_size * 8);
} else {
we = MAKE_64BIT_MASK(0, size * 8);
}
we = register_enabled_mask(reg->data_size, size);
register_write(reg, value, we, reg_array->prefix,
reg_array->debug);
@ -208,6 +213,7 @@ uint64_t register_read_memory(void *opaque, hwaddr addr,
RegisterInfoArray *reg_array = opaque;
RegisterInfo *reg = NULL;
uint64_t read_val;
uint64_t re;
int i;
for (i = 0; i < reg_array->num_elements; i++) {
@ -223,7 +229,10 @@ uint64_t register_read_memory(void *opaque, hwaddr addr,
return 0;
}
read_val = register_read(reg, size * 8, reg_array->prefix,
/* Generate appropriate read enable mask */
re = register_enabled_mask(reg->data_size, size);
read_val = register_read(reg, re, reg_array->prefix,
reg_array->debug);
return extract64(read_val, 0, size * 8);