--- /dev/null
+/*
+ * ACPI implementation
+ *
+ * Copyright (c) 2006 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+#include "sysemu/sysemu.h"
+#include "hw/hw.h"
+#include "hw/i386/pc.h"
+#include "hw/acpi/acpi.h"
+#include "hw/nvram/fw_cfg.h"
+#include "qemu/config-file.h"
+#include "qapi/opts-visitor.h"
+#include "qapi/dealloc-visitor.h"
+#include "qapi-visit.h"
+#include "qapi-event.h"
+
+struct acpi_table_header {
+ uint16_t _length; /* our length, not actual part of the hdr */
+ /* allows easier parsing for fw_cfg clients */
+ char sig[4]; /* ACPI signature (4 ASCII characters) */
+ uint32_t length; /* Length of table, in bytes, including header */
+ uint8_t revision; /* ACPI Specification minor version # */
+ uint8_t checksum; /* To make sum of entire table == 0 */
+ char oem_id[6]; /* OEM identification */
+ char oem_table_id[8]; /* OEM table identification */
+ uint32_t oem_revision; /* OEM revision number */
+ char asl_compiler_id[4]; /* ASL compiler vendor ID */
+ uint32_t asl_compiler_revision; /* ASL compiler revision number */
+} QEMU_PACKED;
+
+#define ACPI_TABLE_HDR_SIZE sizeof(struct acpi_table_header)
+#define ACPI_TABLE_PFX_SIZE sizeof(uint16_t) /* size of the extra prefix */
+
+static const char unsigned dfl_hdr[ACPI_TABLE_HDR_SIZE - ACPI_TABLE_PFX_SIZE] =
+ "QEMU\0\0\0\0\1\0" /* sig (4), len(4), revno (1), csum (1) */
+ "QEMUQEQEMUQEMU\1\0\0\0" /* OEM id (6), table (8), revno (4) */
+ "QEMU\1\0\0\0" /* ASL compiler ID (4), version (4) */
+ ;
+
+char unsigned *acpi_tables;
+size_t acpi_tables_len;
+
+static QemuOptsList qemu_acpi_opts = {
+ .name = "acpi",
+ .implied_opt_name = "data",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_acpi_opts.head),
+ .desc = { { 0 } } /* validated with OptsVisitor */
+};
+
+static void acpi_register_config(void)
+{
+ qemu_add_opts(&qemu_acpi_opts);
+}
+
+machine_init(acpi_register_config);
+
+static int acpi_checksum(const uint8_t *data, int len)
+{
+ int sum, i;
+ sum = 0;
+ for (i = 0; i < len; i++) {
+ sum += data[i];
+ }
+ return (-sum) & 0xff;
+}
+
+
+/* Install a copy of the ACPI table specified in @blob.
+ *
+ * If @has_header is set, @blob starts with the System Description Table Header
+ * structure. Otherwise, "dfl_hdr" is prepended. In any case, each header field
+ * is optionally overwritten from @hdrs.
+ *
+ * It is valid to call this function with
+ * (@blob == NULL && bloblen == 0 && !has_header).
+ *
+ * @hdrs->file and @hdrs->data are ignored.
+ *
+ * SIZE_MAX is considered "infinity" in this function.
+ *
+ * The number of tables that can be installed is not limited, but the 16-bit
+ * counter at the beginning of "acpi_tables" wraps around after UINT16_MAX.
+ */
+static void acpi_table_install(const char unsigned *blob, size_t bloblen,
+ bool has_header,
+ const struct AcpiTableOptions *hdrs,
+ Error **errp)
+{
+ size_t body_start;
+ const char unsigned *hdr_src;
+ size_t body_size, acpi_payload_size;
+ struct acpi_table_header *ext_hdr;
+ unsigned changed_fields;
+
+ /* Calculate where the ACPI table body starts within the blob, plus where
+ * to copy the ACPI table header from.
+ */
+ if (has_header) {
+ /* _length | ACPI header in blob | blob body
+ * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^
+ * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size
+ * == body_start
+ *
+ * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ * acpi_payload_size == bloblen
+ */
+ body_start = sizeof dfl_hdr;
+
+ if (bloblen < body_start) {
+ error_setg(errp, "ACPI table claiming to have header is too "
+ "short, available: %zu, expected: %zu", bloblen,
+ body_start);
+ return;
+ }
+ hdr_src = blob;
+ } else {
+ /* _length | ACPI header in template | blob body
+ * ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^
+ * ACPI_TABLE_PFX_SIZE sizeof dfl_hdr body_size
+ * == bloblen
+ *
+ * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+ * acpi_payload_size
+ */
+ body_start = 0;
+ hdr_src = dfl_hdr;
+ }
+ body_size = bloblen - body_start;
+ acpi_payload_size = sizeof dfl_hdr + body_size;
+
+ if (acpi_payload_size > UINT16_MAX) {
+ error_setg(errp, "ACPI table too big, requested: %zu, max: %u",
+ acpi_payload_size, (unsigned)UINT16_MAX);
+ return;
+ }
+
+ /* We won't fail from here on. Initialize / extend the globals. */
+ if (acpi_tables == NULL) {
+ acpi_tables_len = sizeof(uint16_t);
+ acpi_tables = g_malloc0(acpi_tables_len);
+ }
+
+ acpi_tables = g_realloc(acpi_tables, acpi_tables_len +
+ ACPI_TABLE_PFX_SIZE +
+ sizeof dfl_hdr + body_size);
+
+ ext_hdr = (struct acpi_table_header *)(acpi_tables + acpi_tables_len);
+ acpi_tables_len += ACPI_TABLE_PFX_SIZE;
+
+ memcpy(acpi_tables + acpi_tables_len, hdr_src, sizeof dfl_hdr);
+ acpi_tables_len += sizeof dfl_hdr;
+
+ if (blob != NULL) {
+ memcpy(acpi_tables + acpi_tables_len, blob + body_start, body_size);
+ acpi_tables_len += body_size;
+ }
+
+ /* increase number of tables */
+ stw_le_p(acpi_tables, lduw_le_p(acpi_tables) + 1u);
+
+ /* Update the header fields. The strings need not be NUL-terminated. */
+ changed_fields = 0;
+ ext_hdr->_length = cpu_to_le16(acpi_payload_size);
+
+ if (hdrs->has_sig) {
+ strncpy(ext_hdr->sig, hdrs->sig, sizeof ext_hdr->sig);
+ ++changed_fields;
+ }
+
+ if (has_header && le32_to_cpu(ext_hdr->length) != acpi_payload_size) {
+ fprintf(stderr,
+ "warning: ACPI table has wrong length, header says "
+ "%" PRIu32 ", actual size %zu bytes\n",
+ le32_to_cpu(ext_hdr->length), acpi_payload_size);
+ }
+ ext_hdr->length = cpu_to_le32(acpi_payload_size);
+
+ if (hdrs->has_rev) {
+ ext_hdr->revision = hdrs->rev;
+ ++changed_fields;
+ }
+
+ ext_hdr->checksum = 0;
+
+ if (hdrs->has_oem_id) {
+ strncpy(ext_hdr->oem_id, hdrs->oem_id, sizeof ext_hdr->oem_id);
+ ++changed_fields;
+ }
+ if (hdrs->has_oem_table_id) {
+ strncpy(ext_hdr->oem_table_id, hdrs->oem_table_id,
+ sizeof ext_hdr->oem_table_id);
+ ++changed_fields;
+ }
+ if (hdrs->has_oem_rev) {
+ ext_hdr->oem_revision = cpu_to_le32(hdrs->oem_rev);
+ ++changed_fields;
+ }
+ if (hdrs->has_asl_compiler_id) {
+ strncpy(ext_hdr->asl_compiler_id, hdrs->asl_compiler_id,
+ sizeof ext_hdr->asl_compiler_id);
+ ++changed_fields;
+ }
+ if (hdrs->has_asl_compiler_rev) {
+ ext_hdr->asl_compiler_revision = cpu_to_le32(hdrs->asl_compiler_rev);
+ ++changed_fields;
+ }
+
+ if (!has_header && changed_fields == 0) {
+ fprintf(stderr, "warning: ACPI table: no headers are specified\n");
+ }
+
+ /* recalculate checksum */
+ ext_hdr->checksum = acpi_checksum((const char unsigned *)ext_hdr +
+ ACPI_TABLE_PFX_SIZE, acpi_payload_size);
+}
+
+void acpi_table_add(const QemuOpts *opts, Error **errp)
+{
+ AcpiTableOptions *hdrs = NULL;
+ Error *err = NULL;
+ char **pathnames = NULL;
+ char **cur;
+ size_t bloblen = 0;
+ char unsigned *blob = NULL;
+
+ {
+ OptsVisitor *ov;
+
+ ov = opts_visitor_new(opts);
+ visit_type_AcpiTableOptions(opts_get_visitor(ov), &hdrs, NULL, &err);
+ opts_visitor_cleanup(ov);
+ }
+
+ if (err) {
+ goto out;
+ }
+ if (hdrs->has_file == hdrs->has_data) {
+ error_setg(&err, "'-acpitable' requires one of 'data' or 'file'");
+ goto out;
+ }
+
+ pathnames = g_strsplit(hdrs->has_file ? hdrs->file : hdrs->data, ":", 0);
+ if (pathnames == NULL || pathnames[0] == NULL) {
+ error_setg(&err, "'-acpitable' requires at least one pathname");
+ goto out;
+ }
+
+ /* now read in the data files, reallocating buffer as needed */
+ for (cur = pathnames; *cur; ++cur) {
+ int fd = open(*cur, O_RDONLY | O_BINARY);
+
+ if (fd < 0) {
+ error_setg(&err, "can't open file %s: %s", *cur, strerror(errno));
+ goto out;
+ }
+
+ for (;;) {
+ char unsigned data[8192];
+ ssize_t r;
+
+ r = read(fd, data, sizeof data);
+ if (r == 0) {
+ break;
+ } else if (r > 0) {
+ blob = g_realloc(blob, bloblen + r);
+ memcpy(blob + bloblen, data, r);
+ bloblen += r;
+ } else if (errno != EINTR) {
+ error_setg(&err, "can't read file %s: %s",
+ *cur, strerror(errno));
+ close(fd);
+ goto out;
+ }
+ }
+
+ close(fd);
+ }
+
+ acpi_table_install(blob, bloblen, hdrs->has_file, hdrs, &err);
+
+out:
+ g_free(blob);
+ g_strfreev(pathnames);
+
+ if (hdrs != NULL) {
+ QapiDeallocVisitor *dv;
+
+ dv = qapi_dealloc_visitor_new();
+ visit_type_AcpiTableOptions(qapi_dealloc_get_visitor(dv), &hdrs, NULL,
+ NULL);
+ qapi_dealloc_visitor_cleanup(dv);
+ }
+
+ error_propagate(errp, err);
+}
+
+static bool acpi_table_builtin = false;
+
+void acpi_table_add_builtin(const QemuOpts *opts, Error **errp)
+{
+ acpi_table_builtin = true;
+ acpi_table_add(opts, errp);
+}
+
+unsigned acpi_table_len(void *current)
+{
+ struct acpi_table_header *hdr = current - sizeof(hdr->_length);
+ return hdr->_length;
+}
+
+static
+void *acpi_table_hdr(void *h)
+{
+ struct acpi_table_header *hdr = h;
+ return &hdr->sig;
+}
+
+uint8_t *acpi_table_first(void)
+{
+ if (acpi_table_builtin || !acpi_tables) {
+ return NULL;
+ }
+ return acpi_table_hdr(acpi_tables + ACPI_TABLE_PFX_SIZE);
+}
+
+uint8_t *acpi_table_next(uint8_t *current)
+{
+ uint8_t *next = current + acpi_table_len(current);
+
+ if (next - acpi_tables >= acpi_tables_len) {
+ return NULL;
+ } else {
+ return acpi_table_hdr(next);
+ }
+}
+
+static void acpi_notify_wakeup(Notifier *notifier, void *data)
+{
+ ACPIREGS *ar = container_of(notifier, ACPIREGS, wakeup);
+ WakeupReason *reason = data;
+
+ switch (*reason) {
+ case QEMU_WAKEUP_REASON_RTC:
+ ar->pm1.evt.sts |=
+ (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_RT_CLOCK_STATUS);
+ break;
+ case QEMU_WAKEUP_REASON_PMTIMER:
+ ar->pm1.evt.sts |=
+ (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_TIMER_STATUS);
+ break;
+ case QEMU_WAKEUP_REASON_OTHER:
+ /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
+ Pretend that resume was caused by power button */
+ ar->pm1.evt.sts |=
+ (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS);
+ break;
+ default:
+ break;
+ }
+}
+
+/* ACPI PM1a EVT */
+uint16_t acpi_pm1_evt_get_sts(ACPIREGS *ar)
+{
+ /* Compare ns-clock, not PM timer ticks, because
+ acpi_pm_tmr_update function uses ns for setting the timer. */
+ int64_t d = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ if (d >= muldiv64(ar->tmr.overflow_time,
+ get_ticks_per_sec(), PM_TIMER_FREQUENCY)) {
+ ar->pm1.evt.sts |= ACPI_BITMASK_TIMER_STATUS;
+ }
+ return ar->pm1.evt.sts;
+}
+
+static void acpi_pm1_evt_write_sts(ACPIREGS *ar, uint16_t val)
+{
+ uint16_t pm1_sts = acpi_pm1_evt_get_sts(ar);
+ if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) {
+ /* if TMRSTS is reset, then compute the new overflow time */
+ acpi_pm_tmr_calc_overflow_time(ar);
+ }
+ ar->pm1.evt.sts &= ~val;
+}
+
+static void acpi_pm1_evt_write_en(ACPIREGS *ar, uint16_t val)
+{
+ ar->pm1.evt.en = val;
+ qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC,
+ val & ACPI_BITMASK_RT_CLOCK_ENABLE);
+ qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER,
+ val & ACPI_BITMASK_TIMER_ENABLE);
+}
+
+void acpi_pm1_evt_power_down(ACPIREGS *ar)
+{
+ if (ar->pm1.evt.en & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
+ ar->pm1.evt.sts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
+ ar->tmr.update_sci(ar);
+ }
+}
+
+void acpi_pm1_evt_reset(ACPIREGS *ar)
+{
+ ar->pm1.evt.sts = 0;
+ ar->pm1.evt.en = 0;
+ qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_RTC, 0);
+ qemu_system_wakeup_enable(QEMU_WAKEUP_REASON_PMTIMER, 0);
+}
+
+static uint64_t acpi_pm_evt_read(void *opaque, hwaddr addr, unsigned width)
+{
+ ACPIREGS *ar = opaque;
+ switch (addr) {
+ case 0:
+ return acpi_pm1_evt_get_sts(ar);
+ case 2:
+ return ar->pm1.evt.en;
+ default:
+ return 0;
+ }
+}
+
+static void acpi_pm_evt_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned width)
+{
+ ACPIREGS *ar = opaque;
+ switch (addr) {
+ case 0:
+ acpi_pm1_evt_write_sts(ar, val);
+ ar->pm1.evt.update_sci(ar);
+ break;
+ case 2:
+ acpi_pm1_evt_write_en(ar, val);
+ ar->pm1.evt.update_sci(ar);
+ break;
+ }
+}
+
+static const MemoryRegionOps acpi_pm_evt_ops = {
+ .read = acpi_pm_evt_read,
+ .write = acpi_pm_evt_write,
+ .valid.min_access_size = 2,
+ .valid.max_access_size = 2,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+void acpi_pm1_evt_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
+ MemoryRegion *parent)
+{
+ ar->pm1.evt.update_sci = update_sci;
+ memory_region_init_io(&ar->pm1.evt.io, memory_region_owner(parent),
+ &acpi_pm_evt_ops, ar, "acpi-evt", 4);
+ memory_region_add_subregion(parent, 0, &ar->pm1.evt.io);
+}
+
+/* ACPI PM_TMR */
+void acpi_pm_tmr_update(ACPIREGS *ar, bool enable)
+{
+ int64_t expire_time;
+
+ /* schedule a timer interruption if needed */
+ if (enable) {
+ expire_time = muldiv64(ar->tmr.overflow_time, get_ticks_per_sec(),
+ PM_TIMER_FREQUENCY);
+ timer_mod(ar->tmr.timer, expire_time);
+ } else {
+ timer_del(ar->tmr.timer);
+ }
+}
+
+void acpi_pm_tmr_calc_overflow_time(ACPIREGS *ar)
+{
+ int64_t d = acpi_pm_tmr_get_clock();
+ ar->tmr.overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
+}
+
+static uint32_t acpi_pm_tmr_get(ACPIREGS *ar)
+{
+ uint32_t d = acpi_pm_tmr_get_clock();
+ return d & 0xffffff;
+}
+
+static void acpi_pm_tmr_timer(void *opaque)
+{
+ ACPIREGS *ar = opaque;
+ qemu_system_wakeup_request(QEMU_WAKEUP_REASON_PMTIMER);
+ ar->tmr.update_sci(ar);
+}
+
+static uint64_t acpi_pm_tmr_read(void *opaque, hwaddr addr, unsigned width)
+{
+ return acpi_pm_tmr_get(opaque);
+}
+
+static void acpi_pm_tmr_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned width)
+{
+ /* nothing */
+}
+
+static const MemoryRegionOps acpi_pm_tmr_ops = {
+ .read = acpi_pm_tmr_read,
+ .write = acpi_pm_tmr_write,
+ .valid.min_access_size = 4,
+ .valid.max_access_size = 4,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+void acpi_pm_tmr_init(ACPIREGS *ar, acpi_update_sci_fn update_sci,
+ MemoryRegion *parent)
+{
+ ar->tmr.update_sci = update_sci;
+ ar->tmr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, acpi_pm_tmr_timer, ar);
+ memory_region_init_io(&ar->tmr.io, memory_region_owner(parent),
+ &acpi_pm_tmr_ops, ar, "acpi-tmr", 4);
+ memory_region_clear_global_locking(&ar->tmr.io);
+ memory_region_add_subregion(parent, 8, &ar->tmr.io);
+}
+
+void acpi_pm_tmr_reset(ACPIREGS *ar)
+{
+ ar->tmr.overflow_time = 0;
+ timer_del(ar->tmr.timer);
+}
+
+/* ACPI PM1aCNT */
+static void acpi_pm1_cnt_write(ACPIREGS *ar, uint16_t val)
+{
+ ar->pm1.cnt.cnt = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
+
+ if (val & ACPI_BITMASK_SLEEP_ENABLE) {
+ /* change suspend type */
+ uint16_t sus_typ = (val >> 10) & 7;
+ switch(sus_typ) {
+ case 0: /* soft power off */
+ qemu_system_shutdown_request();
+ break;
+ case 1:
+ qemu_system_suspend_request();
+ break;
+ default:
+ if (sus_typ == ar->pm1.cnt.s4_val) { /* S4 request */
+ qapi_event_send_suspend_disk(&error_abort);
+ qemu_system_shutdown_request();
+ }
+ break;
+ }
+ }
+}
+
+void acpi_pm1_cnt_update(ACPIREGS *ar,
+ bool sci_enable, bool sci_disable)
+{
+ /* ACPI specs 3.0, 4.7.2.5 */
+ if (sci_enable) {
+ ar->pm1.cnt.cnt |= ACPI_BITMASK_SCI_ENABLE;
+ } else if (sci_disable) {
+ ar->pm1.cnt.cnt &= ~ACPI_BITMASK_SCI_ENABLE;
+ }
+}
+
+static uint64_t acpi_pm_cnt_read(void *opaque, hwaddr addr, unsigned width)
+{
+ ACPIREGS *ar = opaque;
+ return ar->pm1.cnt.cnt;
+}
+
+static void acpi_pm_cnt_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned width)
+{
+ acpi_pm1_cnt_write(opaque, val);
+}
+
+static const MemoryRegionOps acpi_pm_cnt_ops = {
+ .read = acpi_pm_cnt_read,
+ .write = acpi_pm_cnt_write,
+ .valid.min_access_size = 2,
+ .valid.max_access_size = 2,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+void acpi_pm1_cnt_init(ACPIREGS *ar, MemoryRegion *parent,
+ bool disable_s3, bool disable_s4, uint8_t s4_val)
+{
+ FWCfgState *fw_cfg;
+
+ ar->pm1.cnt.s4_val = s4_val;
+ ar->wakeup.notify = acpi_notify_wakeup;
+ qemu_register_wakeup_notifier(&ar->wakeup);
+ memory_region_init_io(&ar->pm1.cnt.io, memory_region_owner(parent),
+ &acpi_pm_cnt_ops, ar, "acpi-cnt", 2);
+ memory_region_add_subregion(parent, 4, &ar->pm1.cnt.io);
+
+ fw_cfg = fw_cfg_find();
+ if (fw_cfg) {
+ uint8_t suspend[6] = {128, 0, 0, 129, 128, 128};
+ suspend[3] = 1 | ((!disable_s3) << 7);
+ suspend[4] = s4_val | ((!disable_s4) << 7);
+
+ fw_cfg_add_file(fw_cfg, "etc/system-states", g_memdup(suspend, 6), 6);
+ }
+}
+
+void acpi_pm1_cnt_reset(ACPIREGS *ar)
+{
+ ar->pm1.cnt.cnt = 0;
+}
+
+/* ACPI GPE */
+void acpi_gpe_init(ACPIREGS *ar, uint8_t len)
+{
+ ar->gpe.len = len;
+ ar->gpe.sts = g_malloc0(len / 2);
+ ar->gpe.en = g_malloc0(len / 2);
+}
+
+void acpi_gpe_reset(ACPIREGS *ar)
+{
+ memset(ar->gpe.sts, 0, ar->gpe.len / 2);
+ memset(ar->gpe.en, 0, ar->gpe.len / 2);
+}
+
+static uint8_t *acpi_gpe_ioport_get_ptr(ACPIREGS *ar, uint32_t addr)
+{
+ uint8_t *cur = NULL;
+
+ if (addr < ar->gpe.len / 2) {
+ cur = ar->gpe.sts + addr;
+ } else if (addr < ar->gpe.len) {
+ cur = ar->gpe.en + addr - ar->gpe.len / 2;
+ } else {
+ abort();
+ }
+
+ return cur;
+}
+
+void acpi_gpe_ioport_writeb(ACPIREGS *ar, uint32_t addr, uint32_t val)
+{
+ uint8_t *cur;
+
+ cur = acpi_gpe_ioport_get_ptr(ar, addr);
+ if (addr < ar->gpe.len / 2) {
+ /* GPE_STS */
+ *cur = (*cur) & ~val;
+ } else if (addr < ar->gpe.len) {
+ /* GPE_EN */
+ *cur = val;
+ } else {
+ abort();
+ }
+}
+
+uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr)
+{
+ uint8_t *cur;
+ uint32_t val;
+
+ cur = acpi_gpe_ioport_get_ptr(ar, addr);
+ val = 0;
+ if (cur != NULL) {
+ val = *cur;
+ }
+
+ return val;
+}
+
+void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
+ AcpiGPEStatusBits status)
+{
+ ar->gpe.sts[0] |= status;
+ acpi_update_sci(ar, irq);
+}
+
+void acpi_update_sci(ACPIREGS *regs, qemu_irq irq)
+{
+ int sci_level, pm1a_sts;
+
+ pm1a_sts = acpi_pm1_evt_get_sts(regs);
+
+ sci_level = ((pm1a_sts &
+ regs->pm1.evt.en & ACPI_BITMASK_PM1_COMMON_ENABLED) != 0) ||
+ ((regs->gpe.sts[0] & regs->gpe.en[0]) != 0);
+
+ qemu_set_irq(irq, sci_level);
+
+ /* schedule a timer interruption if needed */
+ acpi_pm_tmr_update(regs,
+ (regs->pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
+ !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
+}
Code Review / kvmfornfv.git / blobdiff