arch/x86/acpi: Add IVRS table generation routines

Change-Id: Ia5d97d01dc9ddc45f81d998d126d592a915b4a75
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12043
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

2 files changed, 56 insertions, 0 deletions

diff --git a/src/arch/x86/acpi.c b/src/arch/x86/acpi.c
index c540b5ce4c..ccaab9ef74 100644
--- a/src/arch/x86/acpi.c
+++ b/src/arch/x86/acpi.c
@@ -6,6 +6,7 @@
  *
  * Copyright (C) 2004 SUSE LINUX AG
  * Copyright (C) 2005-2009 coresystems GmbH
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
  *
  * ACPI FADT, FACS, and DSDT table support added by
  * Nick Barker <nick.barker9@btinternet.com>, and those portions
@@ -531,6 +532,30 @@ void acpi_create_hpet(acpi_hpet_t *hpet)
 	header->checksum = acpi_checksum((void *)hpet, sizeof(acpi_hpet_t));
 }
 
+void acpi_create_ivrs(acpi_ivrs_t *ivrs,
+		      unsigned long (*acpi_fill_ivrs)(acpi_ivrs_t* ivrs_struct, unsigned long current))
+{
+	acpi_header_t *header = &(ivrs->header);
+	unsigned long current = (unsigned long)ivrs + sizeof(acpi_ivrs_t);
+
+	memset((void *)ivrs, 0, sizeof(acpi_ivrs_t));
+
+	/* Fill out header fields. */
+	memcpy(header->signature, "IVRS", 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_ivrs_t);
+	header->revision = 1; /* ACPI 1.0: N/A, ACPI 2.0/3.0/4.0: 1 */
+
+	current = acpi_fill_ivrs(ivrs, current);
+
+	/* (Re)calculate length and checksum. */
+	header->length = current - (unsigned long)ivrs;
+	header->checksum = acpi_checksum((void *)ivrs, header->length);
+}
+
 unsigned long acpi_write_hpet(device_t device, unsigned long current, acpi_rsdp_t *rsdp)
 {
 	acpi_hpet_t *hpet;
diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h
index 87810b6b44..79ae7edb83 100644
--- a/src/arch/x86/include/arch/acpi.h
+++ b/src/arch/x86/include/arch/acpi.h
@@ -4,6 +4,7 @@
  * Copyright (C) 2004 SUSE LINUX AG
  * Copyright (C) 2004 Nick Barker
  * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
  * (Written by Stefan Reinauer <stepan@coresystems.de>)
  *
  * This program is free software; you can redistribute it and/or modify
@@ -190,6 +191,32 @@ typedef struct acpi_madt {
 	u32 flags;			/* Multiple APIC flags */
 } __attribute__ ((packed)) acpi_madt_t;
 
+typedef struct acpi_ivrs_info {
+} __attribute__ ((packed)) acpi_ivrs_info_t;
+
+/* IVRS IVHD (I/O Virtualization Hardware Definition Block) */
+typedef struct acpi_ivrs_ivhd {
+	uint8_t type;
+	uint8_t flags;
+	uint16_t length;
+	uint16_t device_id;
+	uint16_t capability_offset;
+	uint32_t iommu_base_low;
+	uint32_t iommu_base_high;
+	uint16_t pci_segment_group;
+	uint16_t iommu_info;
+	uint32_t efr;
+	uint8_t entry[0];
+} __attribute__ ((packed)) acpi_ivrs_ivhd_t;
+
+/* IVRS (I/O Virtualization Reporting Structure) */
+typedef struct acpi_ivrs {
+	struct acpi_table_header header;
+	uint32_t iv_info;
+	uint32_t reserved[2];
+	struct acpi_ivrs_ivhd ivhd;
+} __attribute__ ((packed)) acpi_ivrs_t;
+
 enum dev_scope_type {
 	SCOPE_PCI_ENDPOINT = 1,
 	SCOPE_PCI_SUB = 2,
@@ -498,6 +525,7 @@ unsigned long fw_cfg_acpi_tables(unsigned long start);
 unsigned long write_acpi_tables(unsigned long addr);
 unsigned long acpi_fill_madt(unsigned long current);
 unsigned long acpi_fill_mcfg(unsigned long current);
+unsigned long acpi_fill_ivrs_ioapic(acpi_ivrs_t* ivrs, unsigned long current);
 void acpi_create_ssdt_generator(acpi_header_t *ssdt, const char *oem_table_id);
 void acpi_create_fadt(acpi_fadt_t *fadt,acpi_facs_t *facs, void *dsdt);
 #if IS_ENABLED(CONFIG_COMMON_FADT)
@@ -536,6 +564,9 @@ void acpi_create_srat(acpi_srat_t *srat,
 void acpi_create_slit(acpi_slit_t *slit,
 		      unsigned long (*acpi_fill_slit)(unsigned long current));
 
+void acpi_create_ivrs(acpi_ivrs_t *ivrs,
+		      unsigned long (*acpi_fill_ivrs)(acpi_ivrs_t* ivrs_struct, unsigned long current));
+
 #if ENV_RAMSTAGE
 void acpi_create_hpet(acpi_hpet_t *hpet);
 unsigned long acpi_write_hpet(device_t device, unsigned long start, acpi_rsdp_t *rsdp);