GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
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+/*
+ * Copyright (c) 2019, ARM Limited. All rights reserved.
+ * Copyright (c) 2023, NVIDIA Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef GIC600_MULTICHIP_H
+#define GIC600_MULTICHIP_H
+
+#include <stdint.h>
+
+/*
+ * GIC-600 microarchitecture supports coherent multichip environments containing
+ * up to 16 chips.
+ */
+#define GIC600_MAX_MULTICHIP	16
+
+typedef struct multichip_spi_ids_desc {
+	uintptr_t gicd_base;
+	uint32_t spi_id_min;
+	uint32_t spi_id_max;
+} multichip_spi_ids_desc_t;
+
+/*******************************************************************************
+ * GIC-600 multichip data structure describes platform specific attributes
+ * related to GIC-600 multichip. Platform port is expected to define these
+ * attributes to initialize the multichip related registers and create
+ * successful connections between the GIC-600s in a multichip system.
+ *
+ * The 'rt_owner_base' field contains the base address of the GIC Distributor
+ * which owns the routing table.
+ *
+ * The 'rt_owner' field contains the chip number which owns the routing table.
+ * Chip number or chip_id starts from 0.
+ *
+ * The 'chip_count' field contains the total number of chips in a multichip
+ * system. This should match the number of entries in 'chip_addrs' and 'spi_ids'
+ * fields.
+ *
+ * The 'chip_addrs' field contains array of chip addresses. These addresses are
+ * implementation specific values.
+ *
+ * The 'multichip_spi_ids_desc_t' field contains array of descriptors used to
+ * provide minimum and maximum SPI interrupt ids that each chip owns and the
+ * corresponding chip base address. Note that SPI interrupt ids can range from
+ * 32 to 960 and it should be group of 32 (i.e., SPI minimum and (SPI maximum +
+ * 1) should be a multiple of 32). If a chip doesn't own any SPI interrupts a
+ * value of {0, 0, 0} should be passed.
+ ******************************************************************************/
+struct gic600_multichip_data {
+	uintptr_t rt_owner_base;
+	unsigned int rt_owner;
+	unsigned int chip_count;
+	uint64_t chip_addrs[GIC600_MAX_MULTICHIP];
+	multichip_spi_ids_desc_t spi_ids[GIC600_MAX_MULTICHIP];
+};
+
+uintptr_t gic600_multichip_gicd_base_for_spi(uint32_t spi_id);
+void gic600_multichip_init(struct gic600_multichip_data *multichip_data);
+bool gic600_multichip_is_initialized(void);
+
+#endif /* GIC600_MULTICHIP_H */