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-rw-r--r--arch/arm/plat-orion/addr-map.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/arm/plat-orion/addr-map.c b/arch/arm/plat-orion/addr-map.c
new file mode 100644
index 00000000000..367ca89ac40
--- /dev/null
+++ b/arch/arm/plat-orion/addr-map.c
@@ -0,0 +1,174 @@
+/*
+ * arch/arm/plat-orion/addr-map.c
+ *
+ * Address map functions for Marvell Orion based SoCs
+ *
+ * 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/module.h>
+#include <linux/init.h>
+#include <linux/mbus.h>
+#include <linux/io.h>
+#include <plat/addr-map.h>
+
+struct mbus_dram_target_info orion_mbus_dram_info;
+
+const struct mbus_dram_target_info *mv_mbus_dram_info(void)
+{
+ return &orion_mbus_dram_info;
+}
+EXPORT_SYMBOL_GPL(mv_mbus_dram_info);
+
+/*
+ * DDR target is the same on all Orion platforms.
+ */
+#define TARGET_DDR 0
+
+/*
+ * Helpers to get DDR bank info
+ */
+#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3))
+#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3))
+
+/*
+ * CPU Address Decode Windows registers
+ */
+#define WIN_CTRL_OFF 0x0000
+#define WIN_BASE_OFF 0x0004
+#define WIN_REMAP_LO_OFF 0x0008
+#define WIN_REMAP_HI_OFF 0x000c
+
+/*
+ * Default implementation
+ */
+static void __init __iomem *
+orion_win_cfg_base(const struct orion_addr_map_cfg *cfg, int win)
+{
+ return (void __iomem *)(cfg->bridge_virt_base + (win << 4));
+}
+
+/*
+ * Default implementation
+ */
+static int __init orion_cpu_win_can_remap(const struct orion_addr_map_cfg *cfg,
+ const int win)
+{
+ if (win < cfg->remappable_wins)
+ return 1;
+
+ return 0;
+}
+
+void __init orion_setup_cpu_win(const struct orion_addr_map_cfg *cfg,
+ const int win, const u32 base,
+ const u32 size, const u8 target,
+ const u8 attr, const int remap)
+{
+ void __iomem *addr = cfg->win_cfg_base(cfg, win);
+ u32 ctrl, base_high, remap_addr;
+
+ if (win >= cfg->num_wins) {
+ printk(KERN_ERR "setup_cpu_win: trying to allocate window "
+ "%d when only %d allowed\n", win, cfg->num_wins);
+ }
+
+ base_high = base & 0xffff0000;
+ ctrl = ((size - 1) & 0xffff0000) | (attr << 8) | (target << 4) | 1;
+
+ writel(base_high, addr + WIN_BASE_OFF);
+ writel(ctrl, addr + WIN_CTRL_OFF);
+ if (cfg->cpu_win_can_remap(cfg, win)) {
+ if (remap < 0)
+ remap_addr = base;
+ else
+ remap_addr = remap;
+ writel(remap_addr & 0xffff0000, addr + WIN_REMAP_LO_OFF);
+ writel(0, addr + WIN_REMAP_HI_OFF);
+ }
+}
+
+/*
+ * Configure a number of windows.
+ */
+static void __init orion_setup_cpu_wins(const struct orion_addr_map_cfg * cfg,
+ const struct orion_addr_map_info *info)
+{
+ while (info->win != -1) {
+ orion_setup_cpu_win(cfg, info->win, info->base, info->size,
+ info->target, info->attr, info->remap);
+ info++;
+ }
+}
+
+static void __init orion_disable_wins(const struct orion_addr_map_cfg * cfg)
+{
+ void __iomem *addr;
+ int i;
+
+ for (i = 0; i < cfg->num_wins; i++) {
+ addr = cfg->win_cfg_base(cfg, i);
+
+ writel(0, addr + WIN_BASE_OFF);
+ writel(0, addr + WIN_CTRL_OFF);
+ if (cfg->cpu_win_can_remap(cfg, i)) {
+ writel(0, addr + WIN_REMAP_LO_OFF);
+ writel(0, addr + WIN_REMAP_HI_OFF);
+ }
+ }
+}
+
+/*
+ * Disable, clear and configure windows.
+ */
+void __init orion_config_wins(struct orion_addr_map_cfg * cfg,
+ const struct orion_addr_map_info *info)
+{
+ if (!cfg->cpu_win_can_remap)
+ cfg->cpu_win_can_remap = orion_cpu_win_can_remap;
+
+ if (!cfg->win_cfg_base)
+ cfg->win_cfg_base = orion_win_cfg_base;
+
+ orion_disable_wins(cfg);
+
+ if (info)
+ orion_setup_cpu_wins(cfg, info);
+}
+
+/*
+ * Setup MBUS dram target info.
+ */
+void __init orion_setup_cpu_mbus_target(const struct orion_addr_map_cfg *cfg,
+ const u32 ddr_window_cpu_base)
+{
+ void __iomem *addr;
+ int i;
+ int cs;
+
+ orion_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
+
+ addr = (void __iomem *)ddr_window_cpu_base;
+
+ for (i = 0, cs = 0; i < 4; i++) {
+ u32 base = readl(addr + DDR_BASE_CS_OFF(i));
+ u32 size = readl(addr + DDR_SIZE_CS_OFF(i));
+
+ /*
+ * Chip select enabled?
+ */
+ if (size & 1) {
+ struct mbus_dram_window *w;
+
+ w = &orion_mbus_dram_info.cs[cs++];
+ w->cs_index = i;
+ w->mbus_attr = 0xf & ~(1 << i);
+ w->base = base & 0xffff0000;
+ w->size = (size | 0x0000ffff) + 1;
+ }
+ }
+ orion_mbus_dram_info.num_cs = cs;
+}