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acpi: add aml_int() term

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* factor out ACPI const int packing out of build_append_value()
  and rename build_append_value() to build_append_int_noprefix()
  it will be reused for adding a plain integer value into AML.
  will be used by is aml_processor() and CRS macro helpers
* extend build_append_int{_noprefix}() to support 64-bit values
  it will be used PCI for generating 64bit _CRS entries

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-02-18 19:14:21 +00:00 • committed by Michael S. Tsirkin
parent 3c054bd51a
commit 295a515df0
3 changed files with 30 additions and 29 deletions
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43
hw/acpi/aml-build.c
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@ -218,44 +218,34 @@ void build_extop_package(GArray *package, uint8_t op)
build_prepend_byte(package, 0x5B); /* ExtOpPrefix */
}
void build_append_value(GArray *table, uint32_t value, int size)
static void build_append_int_noprefix(GArray *table, uint64_t value, int size)
{
uint8_t prefix;
int i;
switch (size) {
case 1:
prefix = 0x0A; /* BytePrefix */
break;
case 2:
prefix = 0x0B; /* WordPrefix */
break;
case 4:
prefix = 0x0C; /* DWordPrefix */
break;
default:
assert(0);
return;
}
build_append_byte(table, prefix);
for (i = 0; i < size; ++i) {
build_append_byte(table, value & 0xFF);
value = value >> 8;
}
}
void build_append_int(GArray *table, uint32_t value)
void build_append_int(GArray *table, uint64_t value)
{
if (value == 0x00) {
build_append_byte(table, 0x00); /* ZeroOp */
} else if (value == 0x01) {
build_append_byte(table, 0x01); /* OneOp */
} else if (value <= 0xFF) {
build_append_value(table, value, 1);
build_append_byte(table, 0x0A); /* BytePrefix */
build_append_int_noprefix(table, value, 1);
} else if (value <= 0xFFFF) {
build_append_value(table, value, 2);
build_append_byte(table, 0x0B); /* WordPrefix */
build_append_int_noprefix(table, value, 2);
} else if (value <= 0xFFFFFFFF) {
build_append_byte(table, 0x0C); /* DWordPrefix */
build_append_int_noprefix(table, value, 4);
} else {
build_append_value(table, value, 4);
build_append_byte(table, 0x0E); /* QWordPrefix */
build_append_int_noprefix(table, value, 8);
}
}
@ -365,6 +355,17 @@ Aml *aml_scope(const char *name_format, ...)
return var;
}
/*
* ACPI 1.0b: 16.2.3 Data Objects Encoding:
* encodes: ByteConst, WordConst, DWordConst, QWordConst, ZeroOp, OneOp
*/
Aml *aml_int(const uint64_t val)
{
Aml *var = aml_alloc();
build_append_int(var->buf, val);
return var;
}
/*
* helper to construct NameString, which returns Aml object
* for using with aml_append or other aml_* terms