[PATCH 07/17] arm: acpi: Add generic ACPI methods

[Patrick Rudolph]

Add generic ACPI code to generate
- MADT GICC
- MADT GICD

as commonly used on arm platforms.

Signed-off-by: Patrick Rudolph <patrick.rudolph@xxxxxxxxxxxxx>
Cc: Tom Rini <trini@xxxxxxxxxxxx>
Cc: Simon Glass <sjg@xxxxxxxxxxxx>
---
 arch/arm/include/asm/acpi_table.h | 18 +++++++++++++
 arch/arm/lib/Makefile             |  1 +
 arch/arm/lib/acpi_table.c         | 44 +++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)
 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..8a25e93847 100644
--- a/arch/arm/include/asm/acpi_table.h
+++ b/arch/arm/include/asm/acpi_table.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __ASM_ACPI_TABLE_H__
+#define __ASM_ACPI_TABLE_H__
+
+#ifndef __ACPI__
+
+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, ulong mpidr,
+			  uint efficiency);
+
+void acpi_write_madt_gicd(struct acpi_madt_gicd *gicd, uint gic_id,
+			  ulong phys_base, uint gic_version);
+
+#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..ea3a6343c9
--- /dev/null
+++ b/arch/arm/lib/acpi_table.c
@@ -0,0 +1,44 @@
+// 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, 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->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;
+}
-- 
2.45.2