gic/gic600: add support for multichip configuration
Add support to configure GIC-600's multichip routing table registers.
Introduce a new gic600 multichip structure in order to support platforms
to pass their GIC-600 multichip information such as routing table owner,
SPI blocks ownership.
This driver is currently experimental and the driver api may change in
the future.
Change-Id: Id409d0bc07843e271ead3fc2f6e3cb38b317878d
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
diff --git a/drivers/arm/gic/v3/gic600_multichip_private.h b/drivers/arm/gic/v3/gic600_multichip_private.h
new file mode 100644
index 0000000..b0217b6
--- /dev/null
+++ b/drivers/arm/gic/v3/gic600_multichip_private.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2019, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef GIC600_MULTICHIP_PRIVATE_H
+#define GIC600_MULTICHIP_PRIVATE_H
+
+#include <drivers/arm/gic600_multichip.h>
+
+#include "gicv3_private.h"
+
+/* GIC600 GICD multichip related offsets */
+#define GICD_CHIPSR U(0xC000)
+#define GICD_DCHIPR U(0xC004)
+#define GICD_CHIPR U(0xC008)
+
+/* GIC600 GICD multichip related masks */
+#define GICD_CHIPRx_PUP_BIT BIT_64(1)
+#define GICD_CHIPRx_SOCKET_STATE BIT_64(0)
+#define GICD_DCHIPR_PUP_BIT BIT_32(0)
+#define GICD_CHIPSR_RTS_MASK (BIT_32(4) | BIT_32(5))
+
+/* GIC600 GICD multichip related shifts */
+#define GICD_CHIPRx_ADDR_SHIFT 16
+#define GICD_CHIPRx_SPI_BLOCK_MIN_SHIFT 10
+#define GICD_CHIPRx_SPI_BLOCKS_SHIFT 5
+#define GICD_CHIPSR_RTS_SHIFT 4
+#define GICD_DCHIPR_RT_OWNER_SHIFT 4
+
+#define GICD_CHIPSR_RTS_STATE_DISCONNECTED U(0)
+#define GICD_CHIPSR_RTS_STATE_UPDATING U(1)
+#define GICD_CHIPSR_RTS_STATE_CONSISTENT U(2)
+
+/* SPI interrupt id minimum and maximum range */
+#define GIC600_SPI_ID_MIN 32
+#define GIC600_SPI_ID_MAX 960
+
+/* Number of retries for PUP update */
+#define GICD_PUP_UPDATE_RETRIES 10000
+
+#define SPI_MIN_INDEX 0
+#define SPI_MAX_INDEX 1
+
+#define SPI_BLOCK_MIN_VALUE(spi_id_min) \
+ (((spi_id_min) - GIC600_SPI_ID_MIN) / \
+ GIC600_SPI_ID_MIN)
+#define SPI_BLOCKS_VALUE(spi_id_min, spi_id_max) \
+ (((spi_id_max) - (spi_id_min) + 1) / \
+ GIC600_SPI_ID_MIN)
+#define GICD_CHIPR_VALUE(chip_addr, spi_block_min, spi_blocks) \
+ (((chip_addr) << GICD_CHIPRx_ADDR_SHIFT) | \
+ ((spi_block_min) << GICD_CHIPRx_SPI_BLOCK_MIN_SHIFT) | \
+ ((spi_blocks) << GICD_CHIPRx_SPI_BLOCKS_SHIFT))
+
+/*
+ * Multichip data assertion macros
+ */
+/* Set bits from 0 to ((spi_id_max + 1) / 32) */
+#define SPI_BLOCKS_TILL_MAX(spi_id_max) ((1 << (((spi_id_max) + 1) >> 5)) - 1)
+/* Set bits from 0 to (spi_id_min / 32) */
+#define SPI_BLOCKS_TILL_MIN(spi_id_min) ((1 << ((spi_id_min) >> 5)) - 1)
+/* Set bits from (spi_id_min / 32) to ((spi_id_max + 1) / 32) */
+#define BLOCKS_OF_32(spi_id_min, spi_id_max) \
+ SPI_BLOCKS_TILL_MAX(spi_id_max) ^ \
+ SPI_BLOCKS_TILL_MIN(spi_id_min)
+
+/*******************************************************************************
+ * GIC-600 multichip operation related helper functions
+ ******************************************************************************/
+static inline uint32_t read_gicd_dchipr(uintptr_t base)
+{
+ return mmio_read_32(base + GICD_DCHIPR);
+}
+
+static inline uint64_t read_gicd_chipr_n(uintptr_t base, uint8_t n)
+{
+ return mmio_read_64(base + (GICD_CHIPR + (8U * n)));
+}
+
+static inline uint32_t read_gicd_chipsr(uintptr_t base)
+{
+ return mmio_read_32(base + GICD_CHIPSR);
+}
+
+static inline void write_gicd_dchipr(uintptr_t base, uint32_t val)
+{
+ mmio_write_32(base + GICD_DCHIPR, val);
+}
+
+static inline void write_gicd_chipr_n(uintptr_t base, uint8_t n, uint64_t val)
+{
+ mmio_write_64(base + (GICD_CHIPR + (8U * n)), val);
+}
+
+#endif /* GIC600_MULTICHIP_PRIVATE_H */