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acpi: add build_append_namestring() helper

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Use build_append_namestring() instead of build_append_nameseg()
So user won't have to care whether name is NameSeg, NamePath or
NameString.

See for reference ACPI 5.0: 20.2.2 Name Objects Encoding

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 2015-01-30 13:29:37 +00:00 committed by Michael S. Tsirkin
parent 19934e0e3d
commit eae8bded9a
3 changed files with 105 additions and 30 deletions
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96
hw/acpi/aml-build.c
View File

@ -23,6 +23,7 @@
#include <stdarg.h>
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include "hw/acpi/aml-build.h"
GArray *build_alloc_array(void)
@ -52,25 +53,102 @@ void build_append_array(GArray *array, GArray *val)
#define ACPI_NAMESEG_LEN 4
void GCC_FMT_ATTR(2, 3)
build_append_nameseg(GArray *array, const char *format, ...)
static void
build_append_nameseg(GArray *array, const char *seg)
{
/* It would be nicer to use g_string_vprintf but it's only there in 2.22 */
char s[] = "XXXX";
int len;
va_list args;
va_start(args, format);
len = vsnprintf(s, sizeof s, format, args);
va_end(args);
len = strlen(seg);
assert(len <= ACPI_NAMESEG_LEN);
g_array_append_vals(array, s, len);
g_array_append_vals(array, seg, len);
/* Pad up to ACPI_NAMESEG_LEN characters if necessary. */
g_array_append_vals(array, "____", ACPI_NAMESEG_LEN - len);
}
static void
build_append_namestringv(GArray *array, const char *format, va_list ap)
{
/* It would be nicer to use g_string_vprintf but it's only there in 2.22 */
char *s;
int len;
va_list va_len;
char **segs;
char **segs_iter;
int seg_count = 0;
va_copy(va_len, ap);
len = vsnprintf(NULL, 0, format, va_len);
va_end(va_len);
len += 1;
s = g_new(typeof(*s), len);
len = vsnprintf(s, len, format, ap);
segs = g_strsplit(s, ".", 0);
g_free(s);
/* count segments */
segs_iter = segs;
while (*segs_iter) {
++segs_iter;
++seg_count;
}
/*
* ACPI 5.0 spec: 20.2.2 Name Objects Encoding:
* "SegCount can be from 1 to 255"
*/
assert(seg_count > 0 && seg_count <= 255);
/* handle RootPath || PrefixPath */
s = *segs;
while (*s == '\\' || *s == '^') {
build_append_byte(array, *s);
++s;
}
switch (seg_count) {
case 1:
if (!*s) {
build_append_byte(array, 0x0); /* NullName */
} else {
build_append_nameseg(array, s);
}
break;
case 2:
build_append_byte(array, 0x2E); /* DualNamePrefix */
build_append_nameseg(array, s);
build_append_nameseg(array, segs[1]);
break;
default:
build_append_byte(array, 0x2F); /* MultiNamePrefix */
build_append_byte(array, seg_count);
/* handle the 1st segment manually due to prefix/root path */
build_append_nameseg(array, s);
/* add the rest of segments */
segs_iter = segs + 1;
while (*segs_iter) {
build_append_nameseg(array, *segs_iter);
++segs_iter;
}
break;
}
g_strfreev(segs);
}
void build_append_namestring(GArray *array, const char *format, ...)
{
va_list ap;
va_start(ap, format);
build_append_namestringv(array, format, ap);
va_end(ap);
}
/* 5.4 Definition Block Encoding */
enum {
PACKAGE_LENGTH_1BYTE_SHIFT = 6, /* Up to 63 - use extra 2 bits. */

37
hw/i386/acpi-build.c
View File

@ -286,7 +286,7 @@ static GArray *build_alloc_method(const char *name, uint8_t arg_count)
{
GArray *method = build_alloc_array();
build_append_nameseg(method, "%s", name);
build_append_namestring(method, "%s", name);
build_append_byte(method, arg_count); /* MethodFlags: ArgCount */
return method;
@ -578,7 +578,7 @@ build_append_notify_method(GArray *device, const char *name,
for (i = 0; i < count; i++) {
GArray *target = build_alloc_array();
build_append_nameseg(target, format, i);
build_append_namestring(target, format, i);
assert(i < 256); /* Fits in 1 byte */
build_append_notify_target_ifequal(method, target, i, 1);
build_free_array(target);
@ -709,24 +709,24 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
if (bus->parent_dev) {
op = 0x82; /* DeviceOp */
build_append_nameseg(bus_table, "S%.02X",
build_append_namestring(bus_table, "S%.02X",
bus->parent_dev->devfn);
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_nameseg(bus_table, "_SUN");
build_append_namestring(bus_table, "_SUN");
build_append_value(bus_table, PCI_SLOT(bus->parent_dev->devfn), 1);
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_nameseg(bus_table, "_ADR");
build_append_namestring(bus_table, "_ADR");
build_append_value(bus_table, (PCI_SLOT(bus->parent_dev->devfn) << 16) |
PCI_FUNC(bus->parent_dev->devfn), 4);
} else {
op = 0x10; /* ScopeOp */;
build_append_nameseg(bus_table, "PCI0");
build_append_namestring(bus_table, "PCI0");
}
bsel = object_property_get_qobject(OBJECT(bus), ACPI_PCIHP_PROP_BSEL, NULL);
if (bsel) {
build_append_byte(bus_table, 0x08); /* NameOp */
build_append_nameseg(bus_table, "BSEL");
build_append_namestring(bus_table, "BSEL");
build_append_int(bus_table, qint_get_int(qobject_to_qint(bsel)));
memset(slot_hotplug_enable, 0xff, sizeof slot_hotplug_enable);
} else {
@ -829,7 +829,7 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
build_append_int(notify, 0x1U << i);
build_append_byte(notify, 0x00); /* NullName */
build_append_byte(notify, 0x86); /* NotifyOp */
build_append_nameseg(notify, "S%.02X", PCI_DEVFN(i, 0));
build_append_namestring(notify, "S%.02X", PCI_DEVFN(i, 0));
build_append_byte(notify, 0x69); /* Arg1Op */
/* Pack it up */
@ -853,12 +853,12 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
if (bsel) {
build_append_byte(method, 0x70); /* StoreOp */
build_append_int(method, qint_get_int(qobject_to_qint(bsel)));
build_append_nameseg(method, "BNUM");
build_append_nameseg(method, "DVNT");
build_append_nameseg(method, "PCIU");
build_append_namestring(method, "BNUM");
build_append_namestring(method, "DVNT");
build_append_namestring(method, "PCIU");
build_append_int(method, 1); /* Device Check */
build_append_nameseg(method, "DVNT");
build_append_nameseg(method, "PCID");
build_append_namestring(method, "DVNT");
build_append_namestring(method, "PCID");
build_append_int(method, 3); /* Eject Request */
}
@ -884,11 +884,8 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
* At the moment this is not needed for root as we have a single root.
*/
if (bus->parent_dev) {
build_append_byte(parent->notify_table, '^'); /* ParentPrefixChar */
build_append_byte(parent->notify_table, 0x2E); /* DualNamePrefix */
build_append_nameseg(parent->notify_table, "S%.02X",
bus->parent_dev->devfn);
build_append_nameseg(parent->notify_table, "PCNT");
build_append_namestring(parent->notify_table, "^PCNT.S%.02X",
bus->parent_dev->devfn);
}
}
@ -956,7 +953,7 @@ build_ssdt(GArray *table_data, GArray *linker,
GArray *sb_scope = build_alloc_array();
uint8_t op = 0x10; /* ScopeOp */
build_append_nameseg(sb_scope, "_SB");
build_append_namestring(sb_scope, "_SB");
/* build Processor object for each processor */
for (i = 0; i < acpi_cpus; i++) {
@ -976,7 +973,7 @@ build_ssdt(GArray *table_data, GArray *linker,
/* build "Name(CPON, Package() { One, One, ..., Zero, Zero, ... })" */
build_append_byte(sb_scope, 0x08); /* NameOp */
build_append_nameseg(sb_scope, "CPON");
build_append_namestring(sb_scope, "CPON");
{
GArray *package = build_alloc_array();

2
include/hw/acpi/aml-build.h
View File

@ -12,7 +12,7 @@ void build_append_byte(GArray *array, uint8_t val);
void build_append_array(GArray *array, GArray *val);
void GCC_FMT_ATTR(2, 3)
build_append_nameseg(GArray *array, const char *format, ...);
build_append_namestring(GArray *array, const char *format, ...);
void build_prepend_package_length(GArray *package, unsigned min_bytes);
void build_package(GArray *package, uint8_t op, unsigned min_bytes);