acpi: Add support for DMAR tables (Intel IOMMU support)
Adds lowlevel handling of DMAR tables for use by mainboards' ACPI code. Not much automagic (yet). Change-Id: Ia86e950dfcc5b9994202ec0e2f6d9a2912c74ad8 Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com> Reviewed-on: http://review.coreboot.org/1654 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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@ -334,6 +334,71 @@ void acpi_create_srat(acpi_srat_t *srat)
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header->checksum = acpi_checksum((void *)srat, header->length);
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}
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unsigned long __attribute__((weak)) acpi_fill_dmar(unsigned long current)
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{
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return current;
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}
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void acpi_create_dmar(acpi_dmar_t *dmar)
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{
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acpi_header_t *header = &(dmar->header);
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unsigned long current = (unsigned long)dmar + sizeof(acpi_dmar_t);
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memset((void *)dmar, 0, sizeof(acpi_dmar_t));
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/* Fill out header fields. */
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memcpy(header->signature, "DMAR", 4);
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memcpy(header->oem_id, OEM_ID, 6);
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memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
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memcpy(header->asl_compiler_id, ASLC, 4);
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header->length = sizeof(acpi_dmar_t);
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header->revision = 1;
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dmar->host_address_width = 40 - 1; /* FIXME: == MTRR size? */
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dmar->flags = 0;
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current = acpi_fill_dmar(current);
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/* (Re)calculate length and checksum. */
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header->length = current - (unsigned long)dmar;
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header->checksum = acpi_checksum((void *)dmar, header->length);
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}
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unsigned long acpi_create_dmar_drhd(unsigned long current, u8 flags,
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u16 segment, u32 bar)
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{
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dmar_entry_t *drhd = (dmar_entry_t *)current;
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memset(drhd, 0, sizeof(*drhd));
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drhd->type = DMAR_DRHD;
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drhd->length = sizeof(*drhd); /* will be fixed up later */
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drhd->flags = flags;
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drhd->segment = segment;
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drhd->bar = bar;
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return drhd->length;
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}
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void acpi_dmar_drhd_fixup(unsigned long base, unsigned long current)
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{
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dmar_entry_t *drhd = (dmar_entry_t *)base;
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drhd->length = current - base;
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}
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unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current, u8 segment,
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u8 dev, u8 fn)
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{
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dev_scope_t *ds = (dev_scope_t *)current;
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memset(ds, 0, sizeof(*ds));
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ds->type = SCOPE_PCI_ENDPOINT;
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ds->length = sizeof(*ds) + 2; /* we don't support longer paths yet */
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ds->start_bus = segment;
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ds->path[0].dev = dev;
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ds->path[0].fn = fn;
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return ds->length;
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}
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/* http://h21007.www2.hp.com/portal/download/files/unprot/Itanium/slit.pdf */
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void acpi_create_slit(acpi_slit_t *slit)
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{
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@ -187,6 +187,54 @@ typedef struct acpi_madt {
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u32 flags; /* Multiple APIC flags */
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} __attribute__ ((packed)) acpi_madt_t;
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enum dev_scope_type {
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SCOPE_PCI_ENDPOINT = 1,
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SCOPE_PCI_SUB = 2,
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SCOPE_IOAPIC = 3,
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SCOPE_MSI_HPET = 4
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};
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typedef struct dev_scope {
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u8 type;
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u8 length;
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u8 reserved[2];
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u8 enumeration;
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u8 start_bus;
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struct {
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u8 dev;
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u8 fn;
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} __attribute__((packed)) path[0];
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} __attribute__ ((packed)) dev_scope_t;
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enum dmar_type {
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DMAR_DRHD = 0,
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DMAR_RMRR = 1,
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DMAR_ATSR = 2,
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DMAR_RHSA = 3
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};
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enum {
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DRHD_INCLUDE_PCI_ALL = 1
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};
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typedef struct dmar_entry {
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u16 type;
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u16 length;
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u8 flags;
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u8 reserved;
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u16 segment;
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u64 bar;
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} __attribute__ ((packed)) dmar_entry_t;
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/* DMAR (DMA Remapping Reporting Structure) */
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typedef struct acpi_dmar {
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struct acpi_table_header header;
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u8 host_address_width;
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u8 flags;
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u8 reserved[10];
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dmar_entry_t structure[0];
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} __attribute__ ((packed)) acpi_dmar_t;
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/* MADT: APIC Structure Types */
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/* TODO: Convert to ALLCAPS. */
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enum acpi_apic_types {
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@ -483,6 +531,15 @@ void acpi_create_mcfg(acpi_mcfg_t *mcfg);
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void acpi_create_facs(acpi_facs_t *facs);
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void acpi_create_dmar(acpi_dmar_t *dmar);
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unsigned long acpi_create_dmar_drhd(unsigned long current, u8 flags,
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u16 segment, u32 bar);
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void acpi_dmar_drhd_fixup(unsigned long base, unsigned long current);
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unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current, u8 segment,
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u8 dev, u8 fn);
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unsigned long acpi_fill_dmar(unsigned long);
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#if CONFIG_HAVE_ACPI_SLIC
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unsigned long acpi_create_slic(unsigned long current);
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#endif
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