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acpi: Add support for DMAR tables (Intel IOMMU support)

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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>
This commit is contained in:
Patrick Georgi
2012-09-11 15:21:01 +02:00
committed by Stefan Reinauer
parent a93c3fe7f0
commit 3b590ffeb4
2 changed files with 122 additions and 0 deletions
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65
src/arch/x86/boot/acpi.c
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@@ -334,6 +334,71 @@ void acpi_create_srat(acpi_srat_t *srat)
header->checksum = acpi_checksum((void *)srat, header->length);
}
unsigned long __attribute__((weak)) acpi_fill_dmar(unsigned long current)
{
return current;
}
void acpi_create_dmar(acpi_dmar_t *dmar)
{
acpi_header_t *header = &(dmar->header);
unsigned long current = (unsigned long)dmar + sizeof(acpi_dmar_t);
memset((void *)dmar, 0, sizeof(acpi_dmar_t));
/* Fill out header fields. */
memcpy(header->signature, "DMAR", 4);
memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
header->length = sizeof(acpi_dmar_t);
header->revision = 1;
dmar->host_address_width = 40 - 1; /* FIXME: == MTRR size? */
dmar->flags = 0;
current = acpi_fill_dmar(current);
/* (Re)calculate length and checksum. */
header->length = current - (unsigned long)dmar;
header->checksum = acpi_checksum((void *)dmar, header->length);
}
unsigned long acpi_create_dmar_drhd(unsigned long current, u8 flags,
u16 segment, u32 bar)
{
dmar_entry_t *drhd = (dmar_entry_t *)current;
memset(drhd, 0, sizeof(*drhd));
drhd->type = DMAR_DRHD;
drhd->length = sizeof(*drhd); /* will be fixed up later */
drhd->flags = flags;
drhd->segment = segment;
drhd->bar = bar;
return drhd->length;
}
void acpi_dmar_drhd_fixup(unsigned long base, unsigned long current)
{
dmar_entry_t *drhd = (dmar_entry_t *)base;
drhd->length = current - base;
}
unsigned long acpi_create_dmar_drhd_ds_pci(unsigned long current, u8 segment,
u8 dev, u8 fn)
{
dev_scope_t *ds = (dev_scope_t *)current;
memset(ds, 0, sizeof(*ds));
ds->type = SCOPE_PCI_ENDPOINT;
ds->length = sizeof(*ds) + 2; /* we don't support longer paths yet */
ds->start_bus = segment;
ds->path[0].dev = dev;
ds->path[0].fn = fn;
return ds->length;
}
/* http://h21007.www2.hp.com/portal/download/files/unprot/Itanium/slit.pdf */
void acpi_create_slit(acpi_slit_t *slit)
{