diff options
Diffstat (limited to 'src/acpi/acpi.c')
| -rw-r--r-- | src/acpi/acpi.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c index e1d40881c2..8d81284ced 100644 --- a/src/acpi/acpi.c +++ b/src/acpi/acpi.c @@ -575,6 +575,90 @@ void acpi_create_srat(acpi_srat_t *srat, header->checksum = acpi_checksum((void *)srat, header->length); } +int acpi_create_cedt_chbs(acpi_cedt_chbs_t *chbs, u32 uid, u32 cxl_ver, u64 base) +{ + memset((void *)chbs, 0, sizeof(acpi_cedt_chbs_t)); + + chbs->type = ACPI_CEDT_STRUCTURE_CHBS; + chbs->length = sizeof(acpi_cedt_chbs_t); + chbs->uid = uid; + chbs->cxl_ver = cxl_ver; + chbs->base = base; + + /* + * CXL spec 2.0 section 9.14.1.2 "CXL CHBS" + * CXL 1.1 spec compliant host bridge: 8KB + * CXL 2.0 spec compliant host bridge: 64KB + */ + if (cxl_ver == ACPI_CEDT_CHBS_CXL_VER_1_1) + chbs->len = 8 * KiB; + else if (cxl_ver == ACPI_CEDT_CHBS_CXL_VER_2_0) + chbs->len = 64 * KiB; + else + printk(BIOS_ERR, "ACPI(%s:%s): Incorrect CXL version:%d\n", __FILE__, __func__, + cxl_ver); + + return chbs->length; +} + +int acpi_create_cedt_cfmws(acpi_cedt_cfmws_t *cfmws, u64 base_hpa, u64 window_size, u8 eniw, + u32 hbig, u16 restriction, u16 qtg_id, const u32 *interleave_target) +{ + memset((void *)cfmws, 0, sizeof(acpi_cedt_cfmws_t)); + + cfmws->type = ACPI_CEDT_STRUCTURE_CFMWS; + + u8 niw = 0; + if (eniw >= 8) + printk(BIOS_ERR, "ACPI(%s:%s): Incorrect eniw::%d\n", __FILE__, __func__, eniw); + else + /* NIW = 2 ** ENIW */ + niw = 0x1 << eniw; + /* 36 + 4 * NIW */ + cfmws->length = sizeof(acpi_cedt_cfmws_t) + 4 * niw; + + cfmws->base_hpa = base_hpa; + cfmws->window_size = window_size; + cfmws->eniw = eniw; + + // 0: Standard Modulo Arithmetic. Other values reserved. + cfmws->interleave_arithmetic = 0; + + cfmws->hbig = hbig; + cfmws->restriction = restriction; + cfmws->qtg_id = qtg_id; + memcpy(&cfmws->interleave_target, interleave_target, 4 * niw); + + return cfmws->length; +} + +void acpi_create_cedt(acpi_cedt_t *cedt, unsigned long (*acpi_fill_cedt)(unsigned long current)) +{ + acpi_header_t *header = &(cedt->header); + unsigned long current = (unsigned long)cedt + sizeof(acpi_cedt_t); + + memset((void *)cedt, 0, sizeof(acpi_cedt_t)); + + if (!header) + return; + + /* Fill out header fields. */ + memcpy(header->signature, "CEDT", 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_cedt_t); + header->revision = get_acpi_table_revision(CEDT); + + current = acpi_fill_cedt(current); + + /* (Re)calculate length and checksum. */ + header->length = current - (unsigned long)cedt; + header->checksum = acpi_checksum((void *)cedt, 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)); |