aboutsummaryrefslogtreecommitdiff
path: root/drivers/acpi/tables.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/acpi/tables.c
downloadlinux-linaro-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/acpi/tables.c')
-rw-r--r--drivers/acpi/tables.c609
1 files changed, 609 insertions, 0 deletions
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
new file mode 100644
index 000000000000..fb64bd5d2e18
--- /dev/null
+++ b/drivers/acpi/tables.c
@@ -0,0 +1,609 @@
+/*
+ * acpi_tables.c - ACPI Boot-Time Table Parsing
+ *
+ * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/irq.h>
+#include <linux/errno.h>
+#include <linux/acpi.h>
+#include <linux/bootmem.h>
+
+#define PREFIX "ACPI: "
+
+#define ACPI_MAX_TABLES 256
+
+static char *acpi_table_signatures[ACPI_TABLE_COUNT] = {
+ [ACPI_TABLE_UNKNOWN] = "????",
+ [ACPI_APIC] = "APIC",
+ [ACPI_BOOT] = "BOOT",
+ [ACPI_DBGP] = "DBGP",
+ [ACPI_DSDT] = "DSDT",
+ [ACPI_ECDT] = "ECDT",
+ [ACPI_ETDT] = "ETDT",
+ [ACPI_FADT] = "FACP",
+ [ACPI_FACS] = "FACS",
+ [ACPI_OEMX] = "OEM",
+ [ACPI_PSDT] = "PSDT",
+ [ACPI_SBST] = "SBST",
+ [ACPI_SLIT] = "SLIT",
+ [ACPI_SPCR] = "SPCR",
+ [ACPI_SRAT] = "SRAT",
+ [ACPI_SSDT] = "SSDT",
+ [ACPI_SPMI] = "SPMI",
+ [ACPI_HPET] = "HPET",
+ [ACPI_MCFG] = "MCFG",
+};
+
+static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
+static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
+
+/* System Description Table (RSDT/XSDT) */
+struct acpi_table_sdt {
+ unsigned long pa;
+ enum acpi_table_id id;
+ unsigned long size;
+} __attribute__ ((packed));
+
+static unsigned long sdt_pa; /* Physical Address */
+static unsigned long sdt_count; /* Table count */
+
+static struct acpi_table_sdt sdt_entry[ACPI_MAX_TABLES];
+
+void
+acpi_table_print (
+ struct acpi_table_header *header,
+ unsigned long phys_addr)
+{
+ char *name = NULL;
+
+ if (!header)
+ return;
+
+ /* Some table signatures aren't good table names */
+
+ if (!strncmp((char *) &header->signature,
+ acpi_table_signatures[ACPI_APIC],
+ sizeof(header->signature))) {
+ name = "MADT";
+ }
+ else if (!strncmp((char *) &header->signature,
+ acpi_table_signatures[ACPI_FADT],
+ sizeof(header->signature))) {
+ name = "FADT";
+ }
+ else
+ name = header->signature;
+
+ printk(KERN_DEBUG PREFIX "%.4s (v%3.3d %6.6s %8.8s 0x%08x %.4s 0x%08x) @ 0x%p\n",
+ name, header->revision, header->oem_id,
+ header->oem_table_id, header->oem_revision,
+ header->asl_compiler_id, header->asl_compiler_revision,
+ (void *) phys_addr);
+}
+
+
+void
+acpi_table_print_madt_entry (
+ acpi_table_entry_header *header)
+{
+ if (!header)
+ return;
+
+ switch (header->type) {
+
+ case ACPI_MADT_LAPIC:
+ {
+ struct acpi_table_lapic *p =
+ (struct acpi_table_lapic*) header;
+ printk(KERN_INFO PREFIX "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
+ p->acpi_id, p->id, p->flags.enabled?"enabled":"disabled");
+ }
+ break;
+
+ case ACPI_MADT_IOAPIC:
+ {
+ struct acpi_table_ioapic *p =
+ (struct acpi_table_ioapic*) header;
+ printk(KERN_INFO PREFIX "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
+ p->id, p->address, p->global_irq_base);
+ }
+ break;
+
+ case ACPI_MADT_INT_SRC_OVR:
+ {
+ struct acpi_table_int_src_ovr *p =
+ (struct acpi_table_int_src_ovr*) header;
+ printk(KERN_INFO PREFIX "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
+ p->bus, p->bus_irq, p->global_irq,
+ mps_inti_flags_polarity[p->flags.polarity],
+ mps_inti_flags_trigger[p->flags.trigger]);
+ if(p->flags.reserved)
+ printk(KERN_INFO PREFIX "INT_SRC_OVR unexpected reserved flags: 0x%x\n",
+ p->flags.reserved);
+
+ }
+ break;
+
+ case ACPI_MADT_NMI_SRC:
+ {
+ struct acpi_table_nmi_src *p =
+ (struct acpi_table_nmi_src*) header;
+ printk(KERN_INFO PREFIX "NMI_SRC (%s %s global_irq %d)\n",
+ mps_inti_flags_polarity[p->flags.polarity],
+ mps_inti_flags_trigger[p->flags.trigger], p->global_irq);
+ }
+ break;
+
+ case ACPI_MADT_LAPIC_NMI:
+ {
+ struct acpi_table_lapic_nmi *p =
+ (struct acpi_table_lapic_nmi*) header;
+ printk(KERN_INFO PREFIX "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
+ p->acpi_id,
+ mps_inti_flags_polarity[p->flags.polarity],
+ mps_inti_flags_trigger[p->flags.trigger], p->lint);
+ }
+ break;
+
+ case ACPI_MADT_LAPIC_ADDR_OVR:
+ {
+ struct acpi_table_lapic_addr_ovr *p =
+ (struct acpi_table_lapic_addr_ovr*) header;
+ printk(KERN_INFO PREFIX "LAPIC_ADDR_OVR (address[%p])\n",
+ (void *) (unsigned long) p->address);
+ }
+ break;
+
+ case ACPI_MADT_IOSAPIC:
+ {
+ struct acpi_table_iosapic *p =
+ (struct acpi_table_iosapic*) header;
+ printk(KERN_INFO PREFIX "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
+ p->id, (void *) (unsigned long) p->address, p->global_irq_base);
+ }
+ break;
+
+ case ACPI_MADT_LSAPIC:
+ {
+ struct acpi_table_lsapic *p =
+ (struct acpi_table_lsapic*) header;
+ printk(KERN_INFO PREFIX "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
+ p->acpi_id, p->id, p->eid, p->flags.enabled?"enabled":"disabled");
+ }
+ break;
+
+ case ACPI_MADT_PLAT_INT_SRC:
+ {
+ struct acpi_table_plat_int_src *p =
+ (struct acpi_table_plat_int_src*) header;
+ printk(KERN_INFO PREFIX "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
+ mps_inti_flags_polarity[p->flags.polarity],
+ mps_inti_flags_trigger[p->flags.trigger],
+ p->type, p->id, p->eid, p->iosapic_vector, p->global_irq);
+ }
+ break;
+
+ default:
+ printk(KERN_WARNING PREFIX "Found unsupported MADT entry (type = 0x%x)\n",
+ header->type);
+ break;
+ }
+}
+
+
+static int
+acpi_table_compute_checksum (
+ void *table_pointer,
+ unsigned long length)
+{
+ u8 *p = (u8 *) table_pointer;
+ unsigned long remains = length;
+ unsigned long sum = 0;
+
+ if (!p || !length)
+ return -EINVAL;
+
+ while (remains--)
+ sum += *p++;
+
+ return (sum & 0xFF);
+}
+
+/*
+ * acpi_get_table_header_early()
+ * for acpi_blacklisted(), acpi_table_get_sdt()
+ */
+int __init
+acpi_get_table_header_early (
+ enum acpi_table_id id,
+ struct acpi_table_header **header)
+{
+ unsigned int i;
+ enum acpi_table_id temp_id;
+
+ /* DSDT is different from the rest */
+ if (id == ACPI_DSDT)
+ temp_id = ACPI_FADT;
+ else
+ temp_id = id;
+
+ /* Locate the table. */
+
+ for (i = 0; i < sdt_count; i++) {
+ if (sdt_entry[i].id != temp_id)
+ continue;
+ *header = (void *)
+ __acpi_map_table(sdt_entry[i].pa, sdt_entry[i].size);
+ if (!*header) {
+ printk(KERN_WARNING PREFIX "Unable to map %s\n",
+ acpi_table_signatures[temp_id]);
+ return -ENODEV;
+ }
+ break;
+ }
+
+ if (!*header) {
+ printk(KERN_WARNING PREFIX "%s not present\n",
+ acpi_table_signatures[id]);
+ return -ENODEV;
+ }
+
+ /* Map the DSDT header via the pointer in the FADT */
+ if (id == ACPI_DSDT) {
+ struct fadt_descriptor_rev2 *fadt = (struct fadt_descriptor_rev2 *) *header;
+
+ if (fadt->revision == 3 && fadt->Xdsdt) {
+ *header = (void *) __acpi_map_table(fadt->Xdsdt,
+ sizeof(struct acpi_table_header));
+ } else if (fadt->V1_dsdt) {
+ *header = (void *) __acpi_map_table(fadt->V1_dsdt,
+ sizeof(struct acpi_table_header));
+ } else
+ *header = NULL;
+
+ if (!*header) {
+ printk(KERN_WARNING PREFIX "Unable to map DSDT\n");
+ return -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+
+int __init
+acpi_table_parse_madt_family (
+ enum acpi_table_id id,
+ unsigned long madt_size,
+ int entry_id,
+ acpi_madt_entry_handler handler,
+ unsigned int max_entries)
+{
+ void *madt = NULL;
+ acpi_table_entry_header *entry;
+ unsigned int count = 0;
+ unsigned long madt_end;
+ unsigned int i;
+
+ if (!handler)
+ return -EINVAL;
+
+ /* Locate the MADT (if exists). There should only be one. */
+
+ for (i = 0; i < sdt_count; i++) {
+ if (sdt_entry[i].id != id)
+ continue;
+ madt = (void *)
+ __acpi_map_table(sdt_entry[i].pa, sdt_entry[i].size);
+ if (!madt) {
+ printk(KERN_WARNING PREFIX "Unable to map %s\n",
+ acpi_table_signatures[id]);
+ return -ENODEV;
+ }
+ break;
+ }
+
+ if (!madt) {
+ printk(KERN_WARNING PREFIX "%s not present\n",
+ acpi_table_signatures[id]);
+ return -ENODEV;
+ }
+
+ madt_end = (unsigned long) madt + sdt_entry[i].size;
+
+ /* Parse all entries looking for a match. */
+
+ entry = (acpi_table_entry_header *)
+ ((unsigned long) madt + madt_size);
+
+ while (((unsigned long) entry) + sizeof(acpi_table_entry_header) < madt_end) {
+ if (entry->type == entry_id &&
+ (!max_entries || count++ < max_entries))
+ if (handler(entry, madt_end))
+ return -EINVAL;
+
+ entry = (acpi_table_entry_header *)
+ ((unsigned long) entry + entry->length);
+ }
+ if (max_entries && count > max_entries) {
+ printk(KERN_WARNING PREFIX "[%s:0x%02x] ignored %i entries of "
+ "%i found\n", acpi_table_signatures[id], entry_id,
+ count - max_entries, count);
+ }
+
+ return count;
+}
+
+
+int __init
+acpi_table_parse_madt (
+ enum acpi_madt_entry_id id,
+ acpi_madt_entry_handler handler,
+ unsigned int max_entries)
+{
+ return acpi_table_parse_madt_family(ACPI_APIC, sizeof(struct acpi_table_madt),
+ id, handler, max_entries);
+}
+
+
+int __init
+acpi_table_parse (
+ enum acpi_table_id id,
+ acpi_table_handler handler)
+{
+ int count = 0;
+ unsigned int i = 0;
+
+ if (!handler)
+ return -EINVAL;
+
+ for (i = 0; i < sdt_count; i++) {
+ if (sdt_entry[i].id != id)
+ continue;
+ count++;
+ if (count == 1)
+ handler(sdt_entry[i].pa, sdt_entry[i].size);
+
+ else
+ printk(KERN_WARNING PREFIX "%d duplicate %s table ignored.\n",
+ count, acpi_table_signatures[id]);
+ }
+
+ return count;
+}
+
+
+static int __init
+acpi_table_get_sdt (
+ struct acpi_table_rsdp *rsdp)
+{
+ struct acpi_table_header *header = NULL;
+ unsigned int i, id = 0;
+
+ if (!rsdp)
+ return -EINVAL;
+
+ /* First check XSDT (but only on ACPI 2.0-compatible systems) */
+
+ if ((rsdp->revision >= 2) &&
+ (((struct acpi20_table_rsdp*)rsdp)->xsdt_address)) {
+
+ struct acpi_table_xsdt *mapped_xsdt = NULL;
+
+ sdt_pa = ((struct acpi20_table_rsdp*)rsdp)->xsdt_address;
+
+ /* map in just the header */
+ header = (struct acpi_table_header *)
+ __acpi_map_table(sdt_pa, sizeof(struct acpi_table_header));
+
+ if (!header) {
+ printk(KERN_WARNING PREFIX "Unable to map XSDT header\n");
+ return -ENODEV;
+ }
+
+ /* remap in the entire table before processing */
+ mapped_xsdt = (struct acpi_table_xsdt *)
+ __acpi_map_table(sdt_pa, header->length);
+ if (!mapped_xsdt) {
+ printk(KERN_WARNING PREFIX "Unable to map XSDT\n");
+ return -ENODEV;
+ }
+ header = &mapped_xsdt->header;
+
+ if (strncmp(header->signature, "XSDT", 4)) {
+ printk(KERN_WARNING PREFIX "XSDT signature incorrect\n");
+ return -ENODEV;
+ }
+
+ if (acpi_table_compute_checksum(header, header->length)) {
+ printk(KERN_WARNING PREFIX "Invalid XSDT checksum\n");
+ return -ENODEV;
+ }
+
+ sdt_count = (header->length - sizeof(struct acpi_table_header)) >> 3;
+ if (sdt_count > ACPI_MAX_TABLES) {
+ printk(KERN_WARNING PREFIX "Truncated %lu XSDT entries\n",
+ (sdt_count - ACPI_MAX_TABLES));
+ sdt_count = ACPI_MAX_TABLES;
+ }
+
+ for (i = 0; i < sdt_count; i++)
+ sdt_entry[i].pa = (unsigned long) mapped_xsdt->entry[i];
+ }
+
+ /* Then check RSDT */
+
+ else if (rsdp->rsdt_address) {
+
+ struct acpi_table_rsdt *mapped_rsdt = NULL;
+
+ sdt_pa = rsdp->rsdt_address;
+
+ /* map in just the header */
+ header = (struct acpi_table_header *)
+ __acpi_map_table(sdt_pa, sizeof(struct acpi_table_header));
+ if (!header) {
+ printk(KERN_WARNING PREFIX "Unable to map RSDT header\n");
+ return -ENODEV;
+ }
+
+ /* remap in the entire table before processing */
+ mapped_rsdt = (struct acpi_table_rsdt *)
+ __acpi_map_table(sdt_pa, header->length);
+ if (!mapped_rsdt) {
+ printk(KERN_WARNING PREFIX "Unable to map RSDT\n");
+ return -ENODEV;
+ }
+ header = &mapped_rsdt->header;
+
+ if (strncmp(header->signature, "RSDT", 4)) {
+ printk(KERN_WARNING PREFIX "RSDT signature incorrect\n");
+ return -ENODEV;
+ }
+
+ if (acpi_table_compute_checksum(header, header->length)) {
+ printk(KERN_WARNING PREFIX "Invalid RSDT checksum\n");
+ return -ENODEV;
+ }
+
+ sdt_count = (header->length - sizeof(struct acpi_table_header)) >> 2;
+ if (sdt_count > ACPI_MAX_TABLES) {
+ printk(KERN_WARNING PREFIX "Truncated %lu RSDT entries\n",
+ (sdt_count - ACPI_MAX_TABLES));
+ sdt_count = ACPI_MAX_TABLES;
+ }
+
+ for (i = 0; i < sdt_count; i++)
+ sdt_entry[i].pa = (unsigned long) mapped_rsdt->entry[i];
+ }
+
+ else {
+ printk(KERN_WARNING PREFIX "No System Description Table (RSDT/XSDT) specified in RSDP\n");
+ return -ENODEV;
+ }
+
+ acpi_table_print(header, sdt_pa);
+
+ for (i = 0; i < sdt_count; i++) {
+
+ /* map in just the header */
+ header = (struct acpi_table_header *)
+ __acpi_map_table(sdt_entry[i].pa,
+ sizeof(struct acpi_table_header));
+ if (!header)
+ continue;
+
+ /* remap in the entire table before processing */
+ header = (struct acpi_table_header *)
+ __acpi_map_table(sdt_entry[i].pa,
+ header->length);
+ if (!header)
+ continue;
+
+ acpi_table_print(header, sdt_entry[i].pa);
+
+ if (acpi_table_compute_checksum(header, header->length)) {
+ printk(KERN_WARNING " >>> ERROR: Invalid checksum\n");
+ continue;
+ }
+
+ sdt_entry[i].size = header->length;
+
+ for (id = 0; id < ACPI_TABLE_COUNT; id++) {
+ if (!strncmp((char *) &header->signature,
+ acpi_table_signatures[id],
+ sizeof(header->signature))) {
+ sdt_entry[i].id = id;
+ }
+ }
+ }
+
+ /*
+ * The DSDT is *not* in the RSDT (why not? no idea.) but we want
+ * to print its info, because this is what people usually blacklist
+ * against. Unfortunately, we don't know the phys_addr, so just
+ * print 0. Maybe no one will notice.
+ */
+ if(!acpi_get_table_header_early(ACPI_DSDT, &header))
+ acpi_table_print(header, 0);
+
+ return 0;
+}
+
+/*
+ * acpi_table_init()
+ *
+ * find RSDP, find and checksum SDT/XSDT.
+ * checksum all tables, print SDT/XSDT
+ *
+ * result: sdt_entry[] is initialized
+ */
+
+int __init
+acpi_table_init (void)
+{
+ struct acpi_table_rsdp *rsdp = NULL;
+ unsigned long rsdp_phys = 0;
+ int result = 0;
+
+ /* Locate and map the Root System Description Table (RSDP) */
+
+ rsdp_phys = acpi_find_rsdp();
+ if (!rsdp_phys) {
+ printk(KERN_ERR PREFIX "Unable to locate RSDP\n");
+ return -ENODEV;
+ }
+
+ rsdp = (struct acpi_table_rsdp *) __va(rsdp_phys);
+ if (!rsdp) {
+ printk(KERN_WARNING PREFIX "Unable to map RSDP\n");
+ return -ENODEV;
+ }
+
+ printk(KERN_DEBUG PREFIX "RSDP (v%3.3d %6.6s ) @ 0x%p\n",
+ rsdp->revision, rsdp->oem_id, (void *) rsdp_phys);
+
+ if (rsdp->revision < 2)
+ result = acpi_table_compute_checksum(rsdp, sizeof(struct acpi_table_rsdp));
+ else
+ result = acpi_table_compute_checksum(rsdp, ((struct acpi20_table_rsdp *)rsdp)->length);
+
+ if (result) {
+ printk(KERN_WARNING " >>> ERROR: Invalid checksum\n");
+ return -ENODEV;
+ }
+
+ /* Locate and map the System Description table (RSDT/XSDT) */
+
+ if (acpi_table_get_sdt(rsdp))
+ return -ENODEV;
+
+ return 0;
+}