From 2a4e1f4b470c73411a46290989c55165cd7968c9 Mon Sep 17 00:00:00 2001 From: Jonathan Zhang Date: Thu, 1 Apr 2021 11:43:37 -0700 Subject: src/acpi: Add initial support for HMAT Add initial HMAT (Heterogeneous Memory Attribute Table) support based on ACPI spec 6.4 section 5.2.27. Add functions to create HMAT table (revision 2) and create HMAT Memory Proximity Domain Attribute (MPDA) Structure. TESTED=Simulated HMAT table creation on OCP DeltaLake server, dumped the HMAT table and exmained the content. HMAT table and one MPDA structure are added. OCP Delatake server is based on Intel CooperLake Scalable Processor which does not support CXL (Compute Express Link). Therefore solution level testing is not done. Signed-off-by: Jonathan Zhang Change-Id: I5ee60ff990c3cea799c5cbdf7eead818b1bb4f9b Reviewed-on: https://review.coreboot.org/c/coreboot/+/52047 Tested-by: build bot (Jenkins) Reviewed-by: Tim Wawrzynczak --- src/acpi/acpi.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) (limited to 'src/acpi/acpi.c') diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c index 5c3fe13614..35c5ec3602 100644 --- a/src/acpi/acpi.c +++ b/src/acpi/acpi.c @@ -539,6 +539,51 @@ void acpi_create_srat(acpi_srat_t *srat, header->checksum = acpi_checksum((void *)srat, header->length); } +int acpi_create_hmat_mpda(acpi_hmat_mpda_t *mpda, u32 initiator, u32 memory) +{ + memset((void *)mpda, 0, sizeof(acpi_hmat_mpda_t)); + + mpda->type = 0; /* Memory Proximity Domain Attributes structure */ + mpda->length = sizeof(acpi_hmat_mpda_t); + /* + * Proximity Domain for Attached Initiator field is valid. + * Bit 1 and bit 2 are reserved since HMAT revision 2. + */ + mpda->flags = (1 << 0); + mpda->proximity_domain_initiator = initiator; + mpda->proximity_domain_memory = memory; + + return mpda->length; +} + +void acpi_create_hmat(acpi_hmat_t *hmat, + unsigned long (*acpi_fill_hmat)(unsigned long current)) +{ + acpi_header_t *header = &(hmat->header); + unsigned long current = (unsigned long)hmat + sizeof(acpi_hmat_t); + + memset((void *)hmat, 0, sizeof(acpi_hmat_t)); + + if (!header) + return; + + /* Fill out header fields. */ + memcpy(header->signature, "HMAT", 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->asl_compiler_revision = asl_revision; + header->length = sizeof(acpi_hmat_t); + header->revision = get_acpi_table_revision(HMAT); + + current = acpi_fill_hmat(current); + + /* (Re)calculate length and checksum. */ + header->length = current - (unsigned long)hmat; + header->checksum = acpi_checksum((void *)hmat, header->length); +} + void acpi_create_dmar(acpi_dmar_t *dmar, enum dmar_flags flags, unsigned long (*acpi_fill_dmar)(unsigned long)) { @@ -1880,6 +1925,8 @@ int get_acpi_table_revision(enum acpi_tables table) return 2; case SRAT: /* ACPI 2.0: 1, ACPI 3.0: 2, ACPI 4.0 upto 6.3: 3 */ return 1; /* TODO Should probably be upgraded to 2 */ + case HMAT: /* ACPI 6.4: 2 */ + return 2; case DMAR: return 1; case SLIT: /* ACPI 2.0 upto 6.3: 1 */ -- cgit v1.2.3