[PATCH v4 07/35] arm: acpi: Add generic ACPI methods

[Patrick Rudolph <patrick.rudolph@9elements.com>]

Add generic ACPI code to generate
- MADT GICC
- MADT GICD
- MADT GICR
- MADT GIC ITS
- PPTT processor
- PPTT cache

as commonly used on arm platforms.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
---
Changelog v2:
- Add full comments to exported functions

---
 arch/arm/include/asm/acpi_table.h | 115 ++++++++++++++++++++++++++++++
 arch/arm/lib/Makefile             |   1 +
 arch/arm/lib/acpi_table.c         | 114 +++++++++++++++++++++++++++++
 include/acpi/acpi_table.h         |  34 ++++++++-
 4 files changed, 263 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/lib/acpi_table.c

diff --git a/arch/arm/include/asm/acpi_table.h b/arch/arm/include/asm/acpi_table.h
index e69de29bb2..c65eabe837 100644
--- a/arch/arm/include/asm/acpi_table.h
+++ b/arch/arm/include/asm/acpi_table.h
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __ASM_ACPI_TABLE_H__
+#define __ASM_ACPI_TABLE_H__
+
+#ifndef __ACPI__
+
+#include <acpi/acpi_table.h>
+
+/**
+ * acpi_write_madt_gicc() - Write out a MADT GICC sub-table
+ *
+ * Write out the GIC CPU Interface sub-table.
+ *
+ * @gicc:             Pointer to place to put the sub-table
+ * @cpu_num:          GIC's CPU Interface Number
+ * @perf_gsiv:        The GSIV used for Performance Monitoring Interrupts
+ * @phys_base:        Address at which the processor can access this
+ *                    GIC CPU Interface
+ * @gicv:             Address of the GIC virtual CPU interface registers
+ * @gich:             Address of the GIC virtual interface control block
+ *                    registers
+ * @vgic_maint_irq:   GSIV for Virtual GIC maintenance interrupt
+ * @gicr_base:        Physical address of the associated Redistributor
+ * @mpidr:            MPIDR as defined by ARM architecture
+ * @efficiency:       Describes the relative power efficiency
+ */
+void acpi_write_madt_gicc(struct acpi_madt_gicc *gicc, uint cpu_num,
+			  uint perf_gsiv, ulong phys_base, ulong gicv,
+			  ulong gich, uint vgic_maint_irq, u64 gicr_base,
+			  ulong mpidr, uint efficiency);
+
+/**
+ * acpi_write_madt_gicd() - Write out a MADT GICD sub-table
+ *
+ * Write out the GIC Distributor sub-table.
+ *
+ * @gicd:            Pointer to place to put the sub-table
+ * @gic_id:          This GIC Distributor's hardware ID
+ * @phys_base:       The 64-bit physical address for this Distributor
+ * @gic_version:     GIC version
+ */
+void acpi_write_madt_gicd(struct acpi_madt_gicd *gicd, uint gic_id,
+			  ulong phys_base, uint gic_version);
+
+/**
+ * acpi_write_madt_gicr() - Write out a MADT GICR sub-table
+ *
+ * Write out the GIC Redistributor sub-table.
+ *
+ * @gicr:                            Pointer to place to put the sub-table
+ * @discovery_range_base_address:    Physical address of a page range
+ *                                   containing all GIC Redistributors
+ * @discovery_range_length:          Length of the GIC Redistributor
+ *                                   Discovery page range
+ */
+void acpi_write_madt_gicr(struct acpi_madt_gicr *gicr,
+			  u64 discovery_range_base_address,
+			  u32 discovery_range_length);
+
+/**
+ * acpi_write_madt_its() - Write out a MADT ITS sub-table
+ *
+ * Write out the GIC Interrupt Translation Service sub-table.
+ *
+ * @its:                    Pointer to place to put the sub-table
+ * @its_id:                 Uniqueue GIC ITS ID
+ * @physical_base_address:  Physical address for the Interrupt
+ *                          Translation Service
+ */
+void acpi_write_madt_its(struct acpi_madt_its *its,
+			 u32 its_id,
+			 u64 physical_base_address);
+
+/**
+ * acpi_pptt_add_proc() - Write out a PPTT processor sub-table
+ *
+ * Write out the Processor Properties Topology Table processor sub-table.
+ *
+ * @ctx:                   ACPI context pointer
+ * @flags:                 Processor Structure Flags
+ * @parent:                Reference to parent processor
+ * @proc_id:               ACPI processor ID as defined in MADT
+ * @num_resources:         Number of resource structure references
+ * @resource_list:         References to other PPTT structures
+ * Return: offset from start of PPTT in bytes
+ */
+int acpi_pptt_add_proc(struct acpi_ctx *ctx, const u32 flags, const u32 parent,
+		       const u32 proc_id, const u32 num_resources,
+		       const u32 *resource_list);
+
+/**
+ * acpi_pptt_add_cache() - Write out a PPTT cache sub-table
+ *
+ * Write out the Processor Properties Topology Table cache sub-table.
+ *
+ * @ctx: ACPI context pointer
+ * @flags:                Cache Structure Flags
+ * @next_cache_level:     Reference to next level of cache
+ * @size:                 Size of the cache in bytes
+ * @sets:                 Number of sets in the cache
+ * @assoc:                Integer number of ways
+ * @attributes:           Allocation type, Cache type, policy
+ * @line_size:            Line size in bytes
+ * Return: offset from start of PPTT in bytes
+ */
+int acpi_pptt_add_cache(struct acpi_ctx *ctx, const u32 flags,
+			const u32 next_cache_level, const u32 size,
+			const u32 sets, const u8 assoc, const u8 attributes,
+			const u16 line_size);
+
+#endif /* !__ASSEMBLY__ */
+#endif /* !__ACPI__ */
+
+#endif /* __ASM_ACPI_TABLE_H__ */
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 67275fba61..a7efed6771 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -86,6 +86,7 @@ obj-y	+= psci-dt.o
 obj-$(CONFIG_DEBUG_LL)	+= debug.o
 
 obj-$(CONFIG_BLOBLIST)  += xferlist.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
 
 # For EABI conformant tool chains, provide eabi_compat()
 ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
diff --git a/arch/arm/lib/acpi_table.c b/arch/arm/lib/acpi_table.c
new file mode 100644
index 0000000000..db6e40bdef
--- /dev/null
+++ b/arch/arm/lib/acpi_table.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Based on acpi.c from coreboot
+ *
+ * Copyright (C) 2024 9elements GmbH
+ */
+
+#define LOG_CATEGORY LOGC_ACPI
+
+#include <acpi/acpigen.h>
+#include <acpi/acpi_device.h>
+#include <acpi/acpi_table.h>
+#include <string.h>
+
+void acpi_write_madt_gicc(struct acpi_madt_gicc *gicc, uint cpu_num,
+			  uint perf_gsiv, ulong phys_base, ulong gicv,
+			  ulong gich, uint vgic_maint_irq, u64 gicr_base,
+			  ulong mpidr, uint efficiency)
+{
+	memset(gicc, '\0', sizeof(struct acpi_madt_gicc));
+	gicc->type = ACPI_APIC_GICC;
+	gicc->length = sizeof(struct acpi_madt_gicc);
+	gicc->cpu_if_num = cpu_num;
+	gicc->processor_id = cpu_num;
+	gicc->flags = ACPI_MADTF_ENABLED;
+	gicc->perf_gsiv = perf_gsiv;
+	gicc->phys_base = phys_base;
+	gicc->gicv = gicv;
+	gicc->gich = gich;
+	gicc->vgic_maint_irq = vgic_maint_irq;
+	gicc->gicr_base = gicr_base;
+	gicc->mpidr = mpidr;
+	gicc->efficiency = efficiency;
+}
+
+void acpi_write_madt_gicd(struct acpi_madt_gicd *gicd, uint gic_id,
+			  ulong phys_base, uint gic_version)
+{
+	memset(gicd, '\0', sizeof(struct acpi_madt_gicd));
+	gicd->type = ACPI_APIC_GICD;
+	gicd->length = sizeof(struct acpi_madt_gicd);
+	gicd->gic_id = gic_id;
+	gicd->phys_base = phys_base;
+	gicd->gic_version = gic_version;
+}
+
+void acpi_write_madt_gicr(struct acpi_madt_gicr *gicr,
+			  u64 discovery_range_base_address,
+			  u32 discovery_range_length)
+{
+	memset(gicr, '\0', sizeof(struct acpi_madt_gicr));
+	gicr->type = ACPI_APIC_GICR;
+	gicr->length = sizeof(struct acpi_madt_gicr);
+	gicr->discovery_range_base_address = discovery_range_base_address;
+	gicr->discovery_range_length = discovery_range_length;
+}
+
+void acpi_write_madt_its(struct acpi_madt_its *its,
+			 u32 its_id,
+			 u64 physical_base_address)
+{
+	memset(its, '\0', sizeof(struct acpi_madt_its));
+	its->type = ACPI_APIC_ITS;
+	its->length = sizeof(struct acpi_madt_its);
+	its->gic_its_id = its_id;
+	its->physical_base_address = physical_base_address;
+}
+
+int acpi_pptt_add_proc(struct acpi_ctx *ctx, const u32 flags, const u32 parent,
+		       const u32 proc_id, const u32 num_resources,
+		       const u32 *resource_list)
+{
+	struct acpi_pptt_proc *proc = ctx->current;
+	int offset;
+
+	offset = ctx->current - ctx->tab_start;
+	proc->hdr.type = ACPI_PPTT_TYPE_PROC;
+	proc->flags = flags;
+	proc->parent = parent;
+	proc->proc_id = proc_id;
+	proc->num_resources = num_resources;
+	proc->hdr.length = sizeof(struct acpi_pptt_proc) +
+		sizeof(u32) * num_resources;
+
+	if (resource_list)
+		memcpy(proc + 1, resource_list, sizeof(u32) * num_resources);
+
+	acpi_inc(ctx, proc->hdr.length);
+
+	return offset;
+}
+
+int acpi_pptt_add_cache(struct acpi_ctx *ctx, const u32 flags,
+			const u32 next_cache_level, const u32 size,
+			const u32 sets, const u8 assoc, const u8 attributes,
+			const u16 line_size)
+{
+	struct acpi_pptt_cache *cache = ctx->current;
+	int offset;
+
+	offset = ctx->current - ctx->tab_start;
+	cache->hdr.type = ACPI_PPTT_TYPE_CACHE;
+	cache->hdr.length = sizeof(struct acpi_pptt_cache);
+	cache->flags = flags;
+	cache->next_cache_level = next_cache_level;
+	cache->size = size;
+	cache->sets = sets;
+	cache->assoc = assoc;
+	cache->attributes = attributes;
+	cache->line_size = line_size;
+	acpi_inc(ctx, cache->hdr.length);
+
+	return offset;
+}
diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h
index c6a3e44a95..7d994a985f 100644
--- a/include/acpi/acpi_table.h
+++ b/include/acpi/acpi_table.h
@@ -342,7 +342,10 @@ enum acpi_apic_types {
 	ACPI_APIC_LX2APIC,		/* Processor local x2APIC */
 	ACPI_APIC_LX2APIC_NMI,		/* Local x2APIC NMI */
 	ACPI_APIC_GICC,			/* Generic Interrupt Ctlr CPU i/f */
-	ACPI_APIC_GICD			/* Generic Interrupt Ctlr Distributor */
+	ACPI_APIC_GICD,			/* Generic Interrupt Ctlr Distributor */
+	ACPI_APIC_MSI_FRAME,		/* Generic Interrupt MSI Frame */
+	ACPI_APIC_GICR,			/* Generic Interrupt Ctlr Redistributor */
+	ACPI_APIC_ITS,			/* Interrupt Translation Service */
 };
 
 /* MADT: Processor Local APIC Structure */
@@ -437,6 +440,35 @@ struct acpi_madt_gicd {
 	u8 reserved3[3];
 } __packed;
 
+/**
+ * struct __packed acpi_madt_gicr - GIC Redistributor (type 0xe)
+ *
+ * This holds information about the Generic Interrupt Controller (GIC)
+ * Redistributor interface. See ACPI Spec v6.3 section 5.2.12.17
+ */
+struct acpi_madt_gicr {
+	u8 type;
+	u8 length;
+	u16 reserved;
+	u64 discovery_range_base_address;
+	u32 discovery_range_length;
+} __packed;
+
+/**
+ * struct __packed acpi_madt_its - GIC Interrupt Translation Service (type 0xf)
+ *
+ * This holds information about the Interrupt Translation Service (ITS)
+ * Structure. See ACPI Spec v6.3 section 5.2.12.18
+ */
+struct acpi_madt_its {
+	u8 type;
+	u8 length;
+	u16 reserved;
+	u32 gic_its_id;
+	u64 physical_base_address;
+	u32 reserved2;
+} __packed;
+
 /* MCFG (PCI Express MMIO config space BAR description table) */
 struct acpi_mcfg {
 	struct acpi_table_header header;
-- 
2.46.0