/* * 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 */ #include "sysemu.h" #include "hw.h" #include "pc.h" #include "acpi.h" struct acpi_table_header { uint16_t _length; /* our length, not actual part of the hdr */ /* XXX why we have 2 length fields here? */ 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 */ } __attribute__((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 dfl_hdr[ACPI_TABLE_HDR_SIZE] = "\0\0" /* fake _length (2) */ "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 *acpi_tables; size_t acpi_tables_len; 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; } /* like strncpy() but zero-fills the tail of destination */ static void strzcpy(char *dst, const char *src, size_t size) { size_t len = strlen(src); if (len >= size) { len = size; } else { memset(dst + len, 0, size - len); } memcpy(dst, src, len); } /* XXX fixme: this function uses obsolete argument parsing interface */ int acpi_table_add(const char *t) { char buf[1024], *p, *f; unsigned long val; size_t len, start, allen; bool has_header; int changed; int r; struct acpi_table_header hdr; r = 0; r |= get_param_value(buf, sizeof(buf), "data", t) ? 1 : 0; r |= get_param_value(buf, sizeof(buf), "file", t) ? 2 : 0; switch (r) { case 0: buf[0] = '\0'; /* fallthrough for default behavior */ case 1: has_header = false; break; case 2: has_header = true; break; default: fprintf(stderr, "acpitable: both data and file are specified\n"); return -1; } if (!acpi_tables) { allen = sizeof(uint16_t); acpi_tables = qemu_mallocz(allen); } else { allen = acpi_tables_len; } start = allen; acpi_tables = qemu_realloc(acpi_tables, start + ACPI_TABLE_HDR_SIZE); allen += has_header ? ACPI_TABLE_PFX_SIZE : ACPI_TABLE_HDR_SIZE; /* now read in the data files, reallocating buffer as needed */ for (f = strtok(buf, ":"); f; f = strtok(NULL, ":")) { int fd = open(f, O_RDONLY); if (fd < 0) { fprintf(stderr, "can't open file %s: %s\n", f, strerror(errno)); return -1; } for (;;) { char data[8192]; r = read(fd, data, sizeof(data)); if (r == 0) { break; } else if (r > 0) { acpi_tables = qemu_realloc(acpi_tables, allen + r); memcpy(acpi_tables + allen, data, r); allen += r; } else if (errno != EINTR) { fprintf(stderr, "can't read file %s: %s\n", f, strerror(errno)); close(fd); return -1; } } close(fd); } /* now fill in the header fields */ f = acpi_tables + start; /* start of the table */ changed = 0; /* copy the header to temp place to align the fields */ memcpy(&hdr, has_header ? f : dfl_hdr, ACPI_TABLE_HDR_SIZE); /* length of the table minus our prefix */ len = allen - start - ACPI_TABLE_PFX_SIZE; hdr._length = cpu_to_le16(len); if (get_param_value(buf, sizeof(buf), "sig", t)) { strzcpy(hdr.sig, buf, sizeof(hdr.sig)); ++changed; } /* length of the table including header, in bytes */ if (has_header) { /* check if actual length is correct */ val = le32_to_cpu(hdr.length); if (val != len) { fprintf(stderr, "warning: acpitable has wrong length," " header says %lu, actual size %zu bytes\n", val, len); ++changed; } } /* we may avoid putting length here if has_header is true */ hdr.length = cpu_to_le32(len); if (get_param_value(buf, sizeof(buf), "rev", t)) { val = strtoul(buf, &p, 0); if (val > 255 || *p) { fprintf(stderr, "acpitable: \"rev=%s\" is invalid\n", buf); return -1; } hdr.revision = (uint8_t)val; ++changed; } if (get_param_value(buf, sizeof(buf), "oem_id", t)) { strzcpy(hdr.oem_id, buf, sizeof(hdr.oem_id)); ++changed; } if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) { strzcpy(hdr.oem_table_id, buf, sizeof(hdr.oem_table_id)); ++changed; } if (get_param_value(buf, sizeof(buf), "oem_rev", t)) { val = strtol(buf, &p, 0); if (*p) { fprintf(stderr, "acpitable: \"oem_rev=%s\" is invalid\n", buf); return -1; } hdr.oem_revision = cpu_to_le32(val); ++changed; } if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) { strzcpy(hdr.asl_compiler_id, buf, sizeof(hdr.asl_compiler_id)); ++changed; } if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) { val = strtol(buf, &p, 0); if (*p) { fprintf(stderr, "acpitable: \"%s=%s\" is invalid\n", "asl_compiler_rev", buf); return -1; } hdr.asl_compiler_revision = cpu_to_le32(val); ++changed; } if (!has_header && !changed) { fprintf(stderr, "warning: acpitable: no table headers are specified\n"); } /* now calculate checksum of the table, complete with the header */ /* we may as well leave checksum intact if has_header is true */ /* alternatively there may be a way to set cksum to a given value */ hdr.checksum = 0; /* for checksum calculation */ /* put header back */ memcpy(f, &hdr, sizeof(hdr)); if (changed || !has_header || 1) { ((struct acpi_table_header *)f)->checksum = acpi_checksum((uint8_t *)f + ACPI_TABLE_PFX_SIZE, len); } /* increase number of tables */ (*(uint16_t *)acpi_tables) = cpu_to_le32(le32_to_cpu(*(uint16_t *)acpi_tables) + 1); acpi_tables_len = allen; return 0; } /* ACPI PM1a EVT */ uint16_t acpi_pm1_evt_get_sts(ACPIPM1EVT *pm1, int64_t overflow_time) { int64_t d = acpi_pm_tmr_get_clock(); if (d >= overflow_time) { pm1->sts |= ACPI_BITMASK_TIMER_STATUS; } return pm1->sts; } void acpi_pm1_evt_write_sts(ACPIPM1EVT *pm1, ACPIPMTimer *tmr, uint16_t val) { uint16_t pm1_sts = acpi_pm1_evt_get_sts(pm1, tmr->overflow_time); if (pm1_sts & val & ACPI_BITMASK_TIMER_STATUS) { /* if TMRSTS is reset, then compute the new overflow time */ acpi_pm_tmr_calc_overflow_time(tmr); } pm1->sts &= ~val; } void acpi_pm1_evt_power_down(ACPIPM1EVT *pm1, ACPIPMTimer *tmr) { if (!pm1) { qemu_system_shutdown_request(); } else if (pm1->en & ACPI_BITMASK_POWER_BUTTON_ENABLE) { pm1->sts |= ACPI_BITMASK_POWER_BUTTON_STATUS; tmr->update_sci(tmr); } } void acpi_pm1_evt_reset(ACPIPM1EVT *pm1) { pm1->sts = 0; pm1->en = 0; } /* ACPI PM_TMR */ void acpi_pm_tmr_update(ACPIPMTimer *tmr, bool enable) { int64_t expire_time; /* schedule a timer interruption if needed */ if (enable) { expire_time = muldiv64(tmr->overflow_time, get_ticks_per_sec(), PM_TIMER_FREQUENCY); qemu_mod_timer(tmr->timer, expire_time); } else { qemu_del_timer(tmr->timer); } } void acpi_pm_tmr_calc_overflow_time(ACPIPMTimer *tmr) { int64_t d = acpi_pm_tmr_get_clock(); tmr->overflow_time = (d + 0x800000LL) & ~0x7fffffLL; } uint32_t acpi_pm_tmr_get(ACPIPMTimer *tmr) { uint32_t d = acpi_pm_tmr_get_clock();; return d & 0xffffff; } static void acpi_pm_tmr_timer(void *opaque) { ACPIPMTimer *tmr = opaque; tmr->update_sci(tmr); } void acpi_pm_tmr_init(ACPIPMTimer *tmr, acpi_update_sci_fn update_sci) { tmr->update_sci = update_sci; tmr->timer = qemu_new_timer_ns(vm_clock, acpi_pm_tmr_timer, tmr); } void acpi_pm_tmr_reset(ACPIPMTimer *tmr) { tmr->overflow_time = 0; qemu_del_timer(tmr->timer); } /* ACPI PM1aCNT */ void acpi_pm1_cnt_init(ACPIPM1CNT *pm1_cnt, qemu_irq cmos_s3) { pm1_cnt->cmos_s3 = cmos_s3; } void acpi_pm1_cnt_write(ACPIPM1EVT *pm1a, ACPIPM1CNT *pm1_cnt, uint16_t val) { 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: /* ACPI_BITMASK_WAKE_STATUS should be set on resume. Pretend that resume was caused by power button */ pm1a->sts |= (ACPI_BITMASK_WAKE_STATUS | ACPI_BITMASK_POWER_BUTTON_STATUS); qemu_system_reset_request(); qemu_irq_raise(pm1_cnt->cmos_s3); default: break; } } } void acpi_pm1_cnt_update(ACPIPM1CNT *pm1_cnt, bool sci_enable, bool sci_disable) { /* ACPI specs 3.0, 4.7.2.5 */ if (sci_enable) { pm1_cnt->cnt |= ACPI_BITMASK_SCI_ENABLE; } else if (sci_disable) { pm1_cnt->cnt &= ~ACPI_BITMASK_SCI_ENABLE; } } void acpi_pm1_cnt_reset(ACPIPM1CNT *pm1_cnt) { pm1_cnt->cnt = 0; if (pm1_cnt->cmos_s3) { qemu_irq_lower(pm1_cnt->cmos_s3); } } /* ACPI GPE */ void acpi_gpe_init(ACPIGPE *gpe, uint8_t len) { gpe->len = len; gpe->sts = qemu_mallocz(len / 2); gpe->en = qemu_mallocz(len / 2); } void acpi_gpe_blk(ACPIGPE *gpe, uint32_t blk) { gpe->blk = blk; } void acpi_gpe_reset(ACPIGPE *gpe) { memset(gpe->sts, 0, gpe->len / 2); memset(gpe->en, 0, gpe->len / 2); } static uint8_t *acpi_gpe_ioport_get_ptr(ACPIGPE *gpe, uint32_t addr) { uint8_t *cur = NULL; if (addr < gpe->len / 2) { cur = gpe->sts + addr; } else if (addr < gpe->len) { cur = gpe->en + addr - gpe->len / 2; } else { abort(); } return cur; } void acpi_gpe_ioport_writeb(ACPIGPE *gpe, uint32_t addr, uint32_t val) { uint8_t *cur; addr -= gpe->blk; cur = acpi_gpe_ioport_get_ptr(gpe, addr); if (addr < gpe->len / 2) { /* GPE_STS */ *cur = (*cur) & ~val; } else if (addr < gpe->len) { /* GPE_EN */ *cur = val; } else { abort(); } } uint32_t acpi_gpe_ioport_readb(ACPIGPE *gpe, uint32_t addr) { uint8_t *cur; uint32_t val; addr -= gpe->blk; cur = acpi_gpe_ioport_get_ptr(gpe, addr); val = 0; if (cur != NULL) { val = *cur; } return val; }