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/*
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* ACPI implementation
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "sysemu.h" |
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#include "hw.h" |
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#include "pc.h" |
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#include "acpi.h" |
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struct acpi_table_header {
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uint16_t _length; /* our length, not actual part of the hdr */
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/* XXX why we have 2 length fields here? */
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char sig[4]; /* ACPI signature (4 ASCII characters) */ |
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uint32_t length; /* Length of table, in bytes, including header */
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uint8_t revision; /* ACPI Specification minor version # */
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uint8_t checksum; /* To make sum of entire table == 0 */
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char oem_id[6]; /* OEM identification */ |
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char oem_table_id[8]; /* OEM table identification */ |
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uint32_t oem_revision; /* OEM revision number */
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char asl_compiler_id[4]; /* ASL compiler vendor ID */ |
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uint32_t asl_compiler_revision; /* ASL compiler revision number */
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} QEMU_PACKED; |
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#define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header) |
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#define ACPI_TABLE_PFX_SIZE sizeof(uint16_t) /* size of the extra prefix */ |
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static const char dfl_hdr[ACPI_TABLE_HDR_SIZE] = |
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"\0\0" /* fake _length (2) */ |
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"QEMU\0\0\0\0\1\0" /* sig (4), len(4), revno (1), csum (1) */ |
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"QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */ |
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"QEMU\1\0\0\0" /* ASL compiler ID (4), version (4) */ |
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; |
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char *acpi_tables;
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size_t acpi_tables_len; |
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static int acpi_checksum(const uint8_t *data, int len) |
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{ |
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int sum, i;
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sum = 0;
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for (i = 0; i < len; i++) { |
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sum += data[i]; |
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} |
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return (-sum) & 0xff; |
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} |
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|
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/* like strncpy() but zero-fills the tail of destination */
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static void strzcpy(char *dst, const char *src, size_t size) |
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{ |
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size_t len = strlen(src); |
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if (len >= size) {
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len = size; |
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} else {
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memset(dst + len, 0, size - len);
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} |
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memcpy(dst, src, len); |
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} |
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/* XXX fixme: this function uses obsolete argument parsing interface */
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int acpi_table_add(const char *t) |
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{ |
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char buf[1024], *p, *f; |
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unsigned long val; |
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size_t len, start, allen; |
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bool has_header;
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int changed;
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int r;
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struct acpi_table_header hdr;
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r = 0;
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r |= get_param_value(buf, sizeof(buf), "data", t) ? 1 : 0; |
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r |= get_param_value(buf, sizeof(buf), "file", t) ? 2 : 0; |
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switch (r) {
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case 0: |
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buf[0] = '\0'; |
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/* fallthrough for default behavior */
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case 1: |
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has_header = false;
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break;
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case 2: |
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has_header = true;
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break;
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default:
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fprintf(stderr, "acpitable: both data and file are specified\n");
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return -1; |
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} |
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if (!acpi_tables) {
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allen = sizeof(uint16_t);
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acpi_tables = g_malloc0(allen); |
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} else {
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allen = acpi_tables_len; |
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} |
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start = allen; |
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acpi_tables = g_realloc(acpi_tables, start + ACPI_TABLE_HDR_SIZE); |
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allen += has_header ? ACPI_TABLE_PFX_SIZE : ACPI_TABLE_HDR_SIZE; |
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/* now read in the data files, reallocating buffer as needed */
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for (f = strtok(buf, ":"); f; f = strtok(NULL, ":")) { |
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int fd = open(f, O_RDONLY);
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if (fd < 0) { |
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fprintf(stderr, "can't open file %s: %s\n", f, strerror(errno));
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return -1; |
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} |
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for (;;) {
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char data[8192]; |
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r = read(fd, data, sizeof(data));
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if (r == 0) { |
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break;
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} else if (r > 0) { |
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acpi_tables = g_realloc(acpi_tables, allen + r); |
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memcpy(acpi_tables + allen, data, r); |
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allen += r; |
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} else if (errno != EINTR) { |
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fprintf(stderr, "can't read file %s: %s\n",
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f, strerror(errno)); |
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close(fd); |
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return -1; |
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} |
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} |
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close(fd); |
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} |
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/* now fill in the header fields */
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f = acpi_tables + start; /* start of the table */
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changed = 0;
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/* copy the header to temp place to align the fields */
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memcpy(&hdr, has_header ? f : dfl_hdr, ACPI_TABLE_HDR_SIZE); |
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/* length of the table minus our prefix */
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len = allen - start - ACPI_TABLE_PFX_SIZE; |
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hdr._length = cpu_to_le16(len); |
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if (get_param_value(buf, sizeof(buf), "sig", t)) { |
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strzcpy(hdr.sig, buf, sizeof(hdr.sig));
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++changed; |
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} |
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/* length of the table including header, in bytes */
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if (has_header) {
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/* check if actual length is correct */
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val = le32_to_cpu(hdr.length); |
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if (val != len) {
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fprintf(stderr, |
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"warning: acpitable has wrong length,"
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" header says %lu, actual size %zu bytes\n",
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val, len); |
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++changed; |
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} |
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} |
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/* we may avoid putting length here if has_header is true */
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hdr.length = cpu_to_le32(len); |
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if (get_param_value(buf, sizeof(buf), "rev", t)) { |
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val = strtoul(buf, &p, 0);
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if (val > 255 || *p) { |
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fprintf(stderr, "acpitable: \"rev=%s\" is invalid\n", buf);
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return -1; |
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} |
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hdr.revision = (uint8_t)val; |
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++changed; |
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} |
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if (get_param_value(buf, sizeof(buf), "oem_id", t)) { |
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strzcpy(hdr.oem_id, buf, sizeof(hdr.oem_id));
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++changed; |
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} |
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if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) { |
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strzcpy(hdr.oem_table_id, buf, sizeof(hdr.oem_table_id));
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++changed; |
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} |
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if (get_param_value(buf, sizeof(buf), "oem_rev", t)) { |
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val = strtol(buf, &p, 0);
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if (*p) {
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fprintf(stderr, "acpitable: \"oem_rev=%s\" is invalid\n", buf);
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return -1; |
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} |
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hdr.oem_revision = cpu_to_le32(val); |
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++changed; |
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} |
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if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) { |
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strzcpy(hdr.asl_compiler_id, buf, sizeof(hdr.asl_compiler_id));
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++changed; |
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} |
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if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) { |
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val = strtol(buf, &p, 0);
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if (*p) {
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fprintf(stderr, "acpitable: \"%s=%s\" is invalid\n",
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"asl_compiler_rev", buf);
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return -1; |
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} |
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hdr.asl_compiler_revision = cpu_to_le32(val); |
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++changed; |
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} |
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if (!has_header && !changed) {
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fprintf(stderr, "warning: acpitable: no table headers are specified\n");
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} |
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/* now calculate checksum of the table, complete with the header */
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/* we may as well leave checksum intact if has_header is true */
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/* alternatively there may be a way to set cksum to a given value */
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hdr.checksum = 0; /* for checksum calculation */ |
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/* put header back */
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memcpy(f, &hdr, sizeof(hdr));
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if (changed || !has_header || 1) { |
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((struct acpi_table_header *)f)->checksum =
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acpi_checksum((uint8_t *)f + ACPI_TABLE_PFX_SIZE, len); |
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} |
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/* increase number of tables */
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(*(uint16_t *)acpi_tables) = |
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cpu_to_le32(le32_to_cpu(*(uint16_t *)acpi_tables) + 1);
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acpi_tables_len = allen; |
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return 0; |
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} |
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static void acpi_notify_wakeup(Notifier *notifier, void *data) |
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{ |
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ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup); |
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WakeupReason *reason = data; |
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switch (*reason) {
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case QEMU_WAKEUP_REASON_RTC:
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ar->pm1.evt.sts |= |
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(ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS); |
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break;
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case QEMU_WAKEUP_REASON_PMTIMER:
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ar->pm1.evt.sts |= |
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(ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS); |
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break;
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case QEMU_WAKEUP_REASON_OTHER:
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default:
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/* ACPI_BITMASK_WAKE_STATUS should be set on resume.
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Pretend that resume was caused by power button */
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ar->pm1.evt.sts |= |
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(ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS); |
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break;
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} |
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} |
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/* ACPI PM1a EVT */
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uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar) |
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{ |
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int64_t d = acpi_pm_tmr_get_clock(); |
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if (d >= ar->tmr.overflow_time) {
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ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS; |
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} |
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return ar->pm1.evt.sts;
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} |
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void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val)
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{ |
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uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar); |
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if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
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/* if TMRSTS is reset, then compute the new overflow time */
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acpi_pm_tmr_calc_overflow_time(ar); |
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} |
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ar->pm1.evt.sts &= ~val; |
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} |
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void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val)
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{ |
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ar->pm1.evt.en = val; |
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qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, |
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val & ACPI_BITMASK_RT_CLOCK_ENABLE); |
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qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, |
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val & ACPI_BITMASK_TIMER_ENABLE); |
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} |
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void acpi_pm1_evt_power_down(ACPIREGS *ar)
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{ |
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if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
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ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS; |
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ar->tmr.update_sci(ar); |
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} |
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} |
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void acpi_pm1_evt_reset(ACPIREGS *ar)
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{ |
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ar->pm1.evt.sts = 0;
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ar->pm1.evt.en = 0;
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qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0);
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qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0);
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} |
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/* ACPI PM_TMR */
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void acpi_pm_tmr_update(ACPIREGS *ar, bool enable) |
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{ |
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int64_t expire_time; |
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/* schedule a timer interruption if needed */
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if (enable) {
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expire_time = muldiv64(ar->tmr.overflow_time, get_ticks_per_sec(), |
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PM_TIMER_FREQUENCY); |
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qemu_mod_timer(ar->tmr.timer, expire_time); |
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} else {
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qemu_del_timer(ar->tmr.timer); |
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} |
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} |
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void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar)
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{ |
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int64_t d = acpi_pm_tmr_get_clock(); |
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ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL; |
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} |
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|
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uint32_t acpi_pm_tmr_get(ACPIREGS *ar) |
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{ |
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uint32_t d = acpi_pm_tmr_get_clock(); |
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return d & 0xffffff; |
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} |
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|
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static void acpi_pm_tmr_timer(void *opaque) |
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{ |
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ACPIREGS *ar = opaque; |
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qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER); |
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ar->tmr.update_sci(ar); |
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} |
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|
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void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci)
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{ |
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ar->tmr.update_sci = update_sci; |
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ar->tmr.timer = qemu_new_timer_ns(vm_clock, acpi_pm_tmr_timer, ar); |
358 |
} |
359 |
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void acpi_pm_tmr_reset(ACPIREGS *ar)
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{ |
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ar->tmr.overflow_time = 0;
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qemu_del_timer(ar->tmr.timer); |
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} |
365 |
|
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/* ACPI PM1aCNT */
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void acpi_pm1_cnt_init(ACPIREGS *ar)
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{ |
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ar->wakeup.notify = acpi_notify_wakeup; |
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qemu_register_wakeup_notifier(&ar->wakeup); |
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} |
372 |
|
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void acpi_pm1_cnt_write(ACPIREGS *ar, uint16_t val)
|
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{ |
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ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE); |
376 |
|
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if (val & ACPI_BITMASK_SLEEP_ENABLE) {
|
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/* change suspend type */
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uint16_t sus_typ = (val >> 10) & 7; |
380 |
switch(sus_typ) {
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case 0: /* soft power off */ |
382 |
qemu_system_shutdown_request(); |
383 |
break;
|
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case 1: |
385 |
qemu_system_suspend_request(); |
386 |
break;
|
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default:
|
388 |
break;
|
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} |
390 |
} |
391 |
} |
392 |
|
393 |
void acpi_pm1_cnt_update(ACPIREGS *ar,
|
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bool sci_enable, bool sci_disable) |
395 |
{ |
396 |
/* ACPI specs 3.0, 4.7.2.5 */
|
397 |
if (sci_enable) {
|
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ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE; |
399 |
} else if (sci_disable) { |
400 |
ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE; |
401 |
} |
402 |
} |
403 |
|
404 |
void acpi_pm1_cnt_reset(ACPIREGS *ar)
|
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{ |
406 |
ar->pm1.cnt.cnt = 0;
|
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} |
408 |
|
409 |
/* ACPI GPE */
|
410 |
void acpi_gpe_init(ACPIREGS *ar, uint8_t len)
|
411 |
{ |
412 |
ar->gpe.len = len; |
413 |
ar->gpe.sts = g_malloc0(len / 2);
|
414 |
ar->gpe.en = g_malloc0(len / 2);
|
415 |
} |
416 |
|
417 |
void acpi_gpe_blk(ACPIREGS *ar, uint32_t blk)
|
418 |
{ |
419 |
ar->gpe.blk = blk; |
420 |
} |
421 |
|
422 |
void acpi_gpe_reset(ACPIREGS *ar)
|
423 |
{ |
424 |
memset(ar->gpe.sts, 0, ar->gpe.len / 2); |
425 |
memset(ar->gpe.en, 0, ar->gpe.len / 2); |
426 |
} |
427 |
|
428 |
static uint8_t *acpi_gpe_ioport_get_ptr(ACPIREGS *ar, uint32_t addr)
|
429 |
{ |
430 |
uint8_t *cur = NULL;
|
431 |
|
432 |
if (addr < ar->gpe.len / 2) { |
433 |
cur = ar->gpe.sts + addr; |
434 |
} else if (addr < ar->gpe.len) { |
435 |
cur = ar->gpe.en + addr - ar->gpe.len / 2;
|
436 |
} else {
|
437 |
abort(); |
438 |
} |
439 |
|
440 |
return cur;
|
441 |
} |
442 |
|
443 |
void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val)
|
444 |
{ |
445 |
uint8_t *cur; |
446 |
|
447 |
addr -= ar->gpe.blk; |
448 |
cur = acpi_gpe_ioport_get_ptr(ar, addr); |
449 |
if (addr < ar->gpe.len / 2) { |
450 |
/* GPE_STS */
|
451 |
*cur = (*cur) & ~val; |
452 |
} else if (addr < ar->gpe.len) { |
453 |
/* GPE_EN */
|
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*cur = val; |
455 |
} else {
|
456 |
abort(); |
457 |
} |
458 |
} |
459 |
|
460 |
uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr) |
461 |
{ |
462 |
uint8_t *cur; |
463 |
uint32_t val; |
464 |
|
465 |
addr -= ar->gpe.blk; |
466 |
cur = acpi_gpe_ioport_get_ptr(ar, addr); |
467 |
val = 0;
|
468 |
if (cur != NULL) { |
469 |
val = *cur; |
470 |
} |
471 |
|
472 |
return val;
|
473 |
} |