acpi: move generic aml building helpers into dedictated file
the will be later used for composing AML primitives and all that could be reused later for ARM machines as well. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Acked-by: Marcel Apfelbaum <marcel@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
Michael S. Tsirkin
parent
12e63900f0
commit
19934e0e3d
@ -2,3 +2,4 @@ common-obj-$(CONFIG_ACPI) += core.o piix4.o ich9.o pcihp.o cpu_hotplug.o
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common-obj-$(CONFIG_ACPI) += memory_hotplug.o
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common-obj-$(CONFIG_ACPI) += acpi_interface.o
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common-obj-$(CONFIG_ACPI) += bios-linker-loader.o
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common-obj-$(CONFIG_ACPI) += aml-build.o
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187
hw/acpi/aml-build.c
Normal file
187
hw/acpi/aml-build.c
Normal file
@ -0,0 +1,187 @@
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/* Support for generating ACPI tables and passing them to Guests
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*
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* Copyright (C) 2015 Red Hat Inc
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*
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* Author: Michael S. Tsirkin <mst@redhat.com>
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* Author: Igor Mammedov <imammedo@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <stdbool.h>
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#include "hw/acpi/aml-build.h"
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GArray *build_alloc_array(void)
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{
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return g_array_new(false, true /* clear */, 1);
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}
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void build_free_array(GArray *array)
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{
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g_array_free(array, true);
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}
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void build_prepend_byte(GArray *array, uint8_t val)
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{
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g_array_prepend_val(array, val);
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}
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void build_append_byte(GArray *array, uint8_t val)
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{
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g_array_append_val(array, val);
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}
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void build_append_array(GArray *array, GArray *val)
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{
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g_array_append_vals(array, val->data, val->len);
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}
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#define ACPI_NAMESEG_LEN 4
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void GCC_FMT_ATTR(2, 3)
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build_append_nameseg(GArray *array, const char *format, ...)
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{
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/* It would be nicer to use g_string_vprintf but it's only there in 2.22 */
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char s[] = "XXXX";
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int len;
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va_list args;
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va_start(args, format);
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len = vsnprintf(s, sizeof s, format, args);
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va_end(args);
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assert(len <= ACPI_NAMESEG_LEN);
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g_array_append_vals(array, s, len);
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/* Pad up to ACPI_NAMESEG_LEN characters if necessary. */
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g_array_append_vals(array, "____", ACPI_NAMESEG_LEN - len);
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}
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/* 5.4 Definition Block Encoding */
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enum {
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PACKAGE_LENGTH_1BYTE_SHIFT = 6, /* Up to 63 - use extra 2 bits. */
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PACKAGE_LENGTH_2BYTE_SHIFT = 4,
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PACKAGE_LENGTH_3BYTE_SHIFT = 12,
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PACKAGE_LENGTH_4BYTE_SHIFT = 20,
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};
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void build_prepend_package_length(GArray *package, unsigned min_bytes)
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{
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uint8_t byte;
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unsigned length = package->len;
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unsigned length_bytes;
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if (length + 1 < (1 << PACKAGE_LENGTH_1BYTE_SHIFT)) {
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length_bytes = 1;
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} else if (length + 2 < (1 << PACKAGE_LENGTH_3BYTE_SHIFT)) {
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length_bytes = 2;
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} else if (length + 3 < (1 << PACKAGE_LENGTH_4BYTE_SHIFT)) {
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length_bytes = 3;
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} else {
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length_bytes = 4;
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}
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/* Force length to at least min_bytes.
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* This wastes memory but that's how bios did it.
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*/
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length_bytes = MAX(length_bytes, min_bytes);
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/* PkgLength is the length of the inclusive length of the data. */
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length += length_bytes;
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switch (length_bytes) {
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case 1:
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byte = length;
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build_prepend_byte(package, byte);
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return;
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case 4:
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byte = length >> PACKAGE_LENGTH_4BYTE_SHIFT;
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build_prepend_byte(package, byte);
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length &= (1 << PACKAGE_LENGTH_4BYTE_SHIFT) - 1;
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/* fall through */
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case 3:
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byte = length >> PACKAGE_LENGTH_3BYTE_SHIFT;
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build_prepend_byte(package, byte);
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length &= (1 << PACKAGE_LENGTH_3BYTE_SHIFT) - 1;
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/* fall through */
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case 2:
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byte = length >> PACKAGE_LENGTH_2BYTE_SHIFT;
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build_prepend_byte(package, byte);
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length &= (1 << PACKAGE_LENGTH_2BYTE_SHIFT) - 1;
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/* fall through */
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}
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/*
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* Most significant two bits of byte zero indicate how many following bytes
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* are in PkgLength encoding.
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*/
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byte = ((length_bytes - 1) << PACKAGE_LENGTH_1BYTE_SHIFT) | length;
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build_prepend_byte(package, byte);
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}
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void build_package(GArray *package, uint8_t op, unsigned min_bytes)
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{
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build_prepend_package_length(package, min_bytes);
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build_prepend_byte(package, op);
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}
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void build_extop_package(GArray *package, uint8_t op)
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{
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build_package(package, op, 1);
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build_prepend_byte(package, 0x5B); /* ExtOpPrefix */
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}
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void build_append_value(GArray *table, uint32_t value, int size)
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{
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uint8_t prefix;
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int i;
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switch (size) {
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case 1:
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prefix = 0x0A; /* BytePrefix */
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break;
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case 2:
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prefix = 0x0B; /* WordPrefix */
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break;
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case 4:
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prefix = 0x0C; /* DWordPrefix */
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break;
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default:
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assert(0);
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return;
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}
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build_append_byte(table, prefix);
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for (i = 0; i < size; ++i) {
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build_append_byte(table, value & 0xFF);
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value = value >> 8;
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}
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}
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void build_append_int(GArray *table, uint32_t value)
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{
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if (value == 0x00) {
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build_append_byte(table, 0x00); /* ZeroOp */
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} else if (value == 0x01) {
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build_append_byte(table, 0x01); /* OneOp */
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} else if (value <= 0xFF) {
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build_append_value(table, value, 1);
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} else if (value <= 0xFFFF) {
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build_append_value(table, value, 2);
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} else {
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build_append_value(table, value, 4);
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}
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}
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@ -54,6 +54,8 @@
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#include "hw/i386/q35-acpi-dsdt.hex"
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#include "hw/i386/acpi-dsdt.hex"
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#include "hw/acpi/aml-build.h"
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#include "qapi/qmp/qint.h"
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#include "qom/qom-qobject.h"
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#include "exec/ram_addr.h"
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@ -280,166 +282,6 @@ build_header(GArray *linker, GArray *table_data,
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table_data->data, h, len, &h->checksum);
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}
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static inline GArray *build_alloc_array(void)
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{
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return g_array_new(false, true /* clear */, 1);
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}
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static inline void build_free_array(GArray *array)
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{
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g_array_free(array, true);
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}
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static inline void build_prepend_byte(GArray *array, uint8_t val)
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{
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g_array_prepend_val(array, val);
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}
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static inline void build_append_byte(GArray *array, uint8_t val)
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{
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g_array_append_val(array, val);
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}
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static inline void build_append_array(GArray *array, GArray *val)
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{
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g_array_append_vals(array, val->data, val->len);
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}
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#define ACPI_NAMESEG_LEN 4
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static void GCC_FMT_ATTR(2, 3)
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build_append_nameseg(GArray *array, const char *format, ...)
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{
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/* It would be nicer to use g_string_vprintf but it's only there in 2.22 */
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char s[] = "XXXX";
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int len;
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va_list args;
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va_start(args, format);
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len = vsnprintf(s, sizeof s, format, args);
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va_end(args);
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assert(len <= ACPI_NAMESEG_LEN);
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g_array_append_vals(array, s, len);
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/* Pad up to ACPI_NAMESEG_LEN characters if necessary. */
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g_array_append_vals(array, "____", ACPI_NAMESEG_LEN - len);
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}
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/* 5.4 Definition Block Encoding */
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enum {
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PACKAGE_LENGTH_1BYTE_SHIFT = 6, /* Up to 63 - use extra 2 bits. */
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PACKAGE_LENGTH_2BYTE_SHIFT = 4,
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PACKAGE_LENGTH_3BYTE_SHIFT = 12,
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PACKAGE_LENGTH_4BYTE_SHIFT = 20,
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};
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static void build_prepend_package_length(GArray *package, unsigned min_bytes)
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{
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uint8_t byte;
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unsigned length = package->len;
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unsigned length_bytes;
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if (length + 1 < (1 << PACKAGE_LENGTH_1BYTE_SHIFT)) {
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length_bytes = 1;
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} else if (length + 2 < (1 << PACKAGE_LENGTH_3BYTE_SHIFT)) {
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length_bytes = 2;
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} else if (length + 3 < (1 << PACKAGE_LENGTH_4BYTE_SHIFT)) {
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length_bytes = 3;
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} else {
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length_bytes = 4;
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}
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/* Force length to at least min_bytes.
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* This wastes memory but that's how bios did it.
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*/
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length_bytes = MAX(length_bytes, min_bytes);
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/* PkgLength is the length of the inclusive length of the data. */
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length += length_bytes;
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switch (length_bytes) {
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case 1:
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byte = length;
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build_prepend_byte(package, byte);
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return;
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case 4:
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byte = length >> PACKAGE_LENGTH_4BYTE_SHIFT;
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build_prepend_byte(package, byte);
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length &= (1 << PACKAGE_LENGTH_4BYTE_SHIFT) - 1;
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/* fall through */
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case 3:
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byte = length >> PACKAGE_LENGTH_3BYTE_SHIFT;
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build_prepend_byte(package, byte);
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length &= (1 << PACKAGE_LENGTH_3BYTE_SHIFT) - 1;
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/* fall through */
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case 2:
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byte = length >> PACKAGE_LENGTH_2BYTE_SHIFT;
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build_prepend_byte(package, byte);
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length &= (1 << PACKAGE_LENGTH_2BYTE_SHIFT) - 1;
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/* fall through */
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}
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/*
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* Most significant two bits of byte zero indicate how many following bytes
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* are in PkgLength encoding.
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*/
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byte = ((length_bytes - 1) << PACKAGE_LENGTH_1BYTE_SHIFT) | length;
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build_prepend_byte(package, byte);
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}
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static void build_package(GArray *package, uint8_t op, unsigned min_bytes)
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{
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build_prepend_package_length(package, min_bytes);
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build_prepend_byte(package, op);
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}
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static void build_extop_package(GArray *package, uint8_t op)
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{
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build_package(package, op, 1);
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build_prepend_byte(package, 0x5B); /* ExtOpPrefix */
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}
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static void build_append_value(GArray *table, uint32_t value, int size)
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{
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uint8_t prefix;
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int i;
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switch (size) {
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case 1:
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prefix = 0x0A; /* BytePrefix */
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break;
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case 2:
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prefix = 0x0B; /* WordPrefix */
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break;
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case 4:
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prefix = 0x0C; /* DWordPrefix */
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break;
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default:
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assert(0);
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return;
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}
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build_append_byte(table, prefix);
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for (i = 0; i < size; ++i) {
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build_append_byte(table, value & 0xFF);
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value = value >> 8;
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}
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}
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static void build_append_int(GArray *table, uint32_t value)
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{
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if (value == 0x00) {
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build_append_byte(table, 0x00); /* ZeroOp */
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} else if (value == 0x01) {
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build_append_byte(table, 0x01); /* OneOp */
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} else if (value <= 0xFF) {
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build_append_value(table, value, 1);
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} else if (value <= 0xFFFF) {
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build_append_value(table, value, 2);
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} else {
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build_append_value(table, value, 4);
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}
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}
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static GArray *build_alloc_method(const char *name, uint8_t arg_count)
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{
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GArray *method = build_alloc_array();
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23
include/hw/acpi/aml-build.h
Normal file
23
include/hw/acpi/aml-build.h
Normal file
@ -0,0 +1,23 @@
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#ifndef HW_ACPI_GEN_UTILS_H
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#define HW_ACPI_GEN_UTILS_H
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#include <stdint.h>
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#include <glib.h>
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#include "qemu/compiler.h"
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GArray *build_alloc_array(void);
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void build_free_array(GArray *array);
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void build_prepend_byte(GArray *array, uint8_t val);
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void build_append_byte(GArray *array, uint8_t val);
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void build_append_array(GArray *array, GArray *val);
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void GCC_FMT_ATTR(2, 3)
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build_append_nameseg(GArray *array, const char *format, ...);
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void build_prepend_package_length(GArray *package, unsigned min_bytes);
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void build_package(GArray *package, uint8_t op, unsigned min_bytes);
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void build_append_value(GArray *table, uint32_t value, int size);
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void build_append_int(GArray *table, uint32_t value);
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void build_extop_package(GArray *package, uint8_t op);
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#endif
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