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-rw-r--r--arch/arm/mach-mvebu/addr-map.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/addr-map.c b/arch/arm/mach-mvebu/addr-map.c
new file mode 100644
index 00000000000..ab9b3bd4fef
--- /dev/null
+++ b/arch/arm/mach-mvebu/addr-map.c
@@ -0,0 +1,137 @@
+/*
+ * Address map functions for Marvell 370 / XP SoCs
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mbus.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <plat/addr-map.h>
+
+/*
+ * Generic Address Decode Windows bit settings
+ */
+#define ARMADA_XP_TARGET_DEV_BUS 1
+#define ARMADA_XP_ATTR_DEV_BOOTROM 0x1D
+#define ARMADA_XP_TARGET_ETH1 3
+#define ARMADA_XP_TARGET_PCIE_0_2 4
+#define ARMADA_XP_TARGET_ETH0 7
+#define ARMADA_XP_TARGET_PCIE_1_3 8
+
+#define ARMADA_370_TARGET_DEV_BUS 1
+#define ARMADA_370_ATTR_DEV_BOOTROM 0x1D
+#define ARMADA_370_TARGET_PCIE_0 4
+#define ARMADA_370_TARGET_PCIE_1 8
+
+#define ARMADA_WINDOW_8_PLUS_OFFSET 0x90
+#define ARMADA_SDRAM_ADDR_DECODING_OFFSET 0x180
+
+static const struct __initdata orion_addr_map_info
+armada_xp_addr_map_info[] = {
+ /*
+ * Window for the BootROM, needed for SMP on Armada XP
+ */
+ { 0, 0xfff00000, SZ_1M, ARMADA_XP_TARGET_DEV_BUS,
+ ARMADA_XP_ATTR_DEV_BOOTROM, -1 },
+ /* End marker */
+ { -1, 0, 0, 0, 0, 0 },
+};
+
+static const struct __initdata orion_addr_map_info
+armada_370_addr_map_info[] = {
+ /* End marker */
+ { -1, 0, 0, 0, 0, 0 },
+};
+
+static struct of_device_id of_addr_decoding_controller_table[] = {
+ { .compatible = "marvell,armada-addr-decoding-controller" },
+ { /* end of list */ },
+};
+
+static void __iomem *
+armada_cfg_base(const struct orion_addr_map_cfg *cfg, int win)
+{
+ unsigned int offset;
+
+ /* The register layout is a bit annoying and the below code
+ * tries to cope with it.
+ * - At offset 0x0, there are the registers for the first 8
+ * windows, with 4 registers of 32 bits per window (ctrl,
+ * base, remap low, remap high)
+ * - Then at offset 0x80, there is a hole of 0x10 bytes for
+ * the internal registers base address and internal units
+ * sync barrier register.
+ * - Then at offset 0x90, there the registers for 12
+ * windows, with only 2 registers of 32 bits per window
+ * (ctrl, base).
+ */
+ if (win < 8)
+ offset = (win << 4);
+ else
+ offset = ARMADA_WINDOW_8_PLUS_OFFSET + ((win - 8) << 3);
+
+ return cfg->bridge_virt_base + offset;
+}
+
+static struct __initdata orion_addr_map_cfg addr_map_cfg = {
+ .num_wins = 20,
+ .remappable_wins = 8,
+ .win_cfg_base = armada_cfg_base,
+};
+
+static int __init armada_setup_cpu_mbus(void)
+{
+ struct device_node *np;
+ void __iomem *mbus_unit_addr_decoding_base;
+ void __iomem *sdram_addr_decoding_base;
+
+ np = of_find_matching_node(NULL, of_addr_decoding_controller_table);
+ if (!np)
+ return -ENODEV;
+
+ mbus_unit_addr_decoding_base = of_iomap(np, 0);
+ BUG_ON(!mbus_unit_addr_decoding_base);
+
+ sdram_addr_decoding_base =
+ mbus_unit_addr_decoding_base +
+ ARMADA_SDRAM_ADDR_DECODING_OFFSET;
+
+ addr_map_cfg.bridge_virt_base = mbus_unit_addr_decoding_base;
+
+ if (of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric"))
+ addr_map_cfg.hw_io_coherency = 1;
+
+ /*
+ * Disable, clear and configure windows.
+ */
+ if (of_machine_is_compatible("marvell,armadaxp"))
+ orion_config_wins(&addr_map_cfg, armada_xp_addr_map_info);
+ else if (of_machine_is_compatible("marvell,armada370"))
+ orion_config_wins(&addr_map_cfg, armada_370_addr_map_info);
+ else {
+ pr_err("Unsupported SoC\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Setup MBUS dram target info.
+ */
+ orion_setup_cpu_mbus_target(&addr_map_cfg,
+ sdram_addr_decoding_base);
+ return 0;
+}
+
+/* Using a early_initcall is needed so that this initialization gets
+ * done before the SMP initialization, which requires the BootROM to
+ * be remapped. */
+early_initcall(armada_setup_cpu_mbus);