sparc: prepare kernel/ for unification

o sparc32 files with identical names to sparc64 renamed to <name>_32.S
o introduced a few Kconfig helpers to simplify Makefile logic
o refactored Makefile to prepare for unification
  - use obj-$(CONFIG_SPARC32) for sparc32 specific files
  - use <name>_$(BITS) for files where sparc64 has a _64 variant
  - sparc64 directly include a few files where sparc32 builds them,
    refer to these files directly (no BITS)
  - sneaked in -Werror as used by sparc64
o modified sparc/Makefile to use the new names for head/init_task

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 627 insertions, 0 deletions

diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
new file mode 100644
index 000000000000..0a83bd737654
--- /dev/null
+++ b/arch/sparc/kernel/of_device_32.c
@@ -0,0 +1,627 @@
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+
+static int node_match(struct device *dev, void *data)
+{
+        struct of_device *op = to_of_device(dev);
+        struct device_node *dp = data;
+
+        return (op->node == dp);
+}
+
+struct of_device *of_find_device_by_node(struct device_node *dp)
+{
+        struct device *dev = bus_find_device(&of_platform_bus_type, NULL,
+                                             dp, node_match);
+
+        if (dev)
+                return to_of_device(dev);
+
+        return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_node);
+
+unsigned int irq_of_parse_and_map(struct device_node *node, int index)
+{
+        struct of_device *op = of_find_device_by_node(node);
+
+        if (!op || index >= op->num_irqs)
+                return 0;
+
+        return op->irqs[index];
+}
+EXPORT_SYMBOL(irq_of_parse_and_map);
+
+/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
+ * BUS and propagate to all child of_device objects.
+ */
+void of_propagate_archdata(struct of_device *bus)
+{
+        struct dev_archdata *bus_sd = &bus->dev.archdata;
+        struct device_node *bus_dp = bus->node;
+        struct device_node *dp;
+
+        for (dp = bus_dp->child; dp; dp = dp->sibling) {
+                struct of_device *op = of_find_device_by_node(dp);
+
+                op->dev.archdata.iommu = bus_sd->iommu;
+                op->dev.archdata.stc = bus_sd->stc;
+                op->dev.archdata.host_controller = bus_sd->host_controller;
+                op->dev.archdata.numa_node = bus_sd->numa_node;
+
+                if (dp->child)
+                        of_propagate_archdata(op);
+        }
+}
+
+struct bus_type of_platform_bus_type;
+EXPORT_SYMBOL(of_platform_bus_type);
+
+static inline u64 of_read_addr(const u32 *cell, int size)
+{
+        u64 r = 0;
+        while (size--)
+                r = (r << 32) | *(cell++);
+        return r;
+}
+
+static void __init get_cells(struct device_node *dp,
+                             int *addrc, int *sizec)
+{
+        if (addrc)
+                *addrc = of_n_addr_cells(dp);
+        if (sizec)
+                *sizec = of_n_size_cells(dp);
+}
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS       4
+
+struct of_bus {
+        const char      *name;
+        const char      *addr_prop_name;
+        int             (*match)(struct device_node *parent);
+        void            (*count_cells)(struct device_node *child,
+                                       int *addrc, int *sizec);
+        int             (*map)(u32 *addr, const u32 *range,
+                               int na, int ns, int pna);
+        unsigned long   (*get_flags)(const u32 *addr, unsigned long);
+};
+
+/*
+ * Default translator (generic bus)
+ */
+
+static void of_bus_default_count_cells(struct device_node *dev,
+                                       int *addrc, int *sizec)
+{
+        get_cells(dev, addrc, sizec);
+}
+
+/* Make sure the least significant 64-bits are in-range.  Even
+ * for 3 or 4 cell values it is a good enough approximation.
+ */
+static int of_out_of_range(const u32 *addr, const u32 *base,
+                           const u32 *size, int na, int ns)
+{
+        u64 a = of_read_addr(addr, na);
+        u64 b = of_read_addr(base, na);
+
+        if (a < b)
+                return 1;
+
+        b += of_read_addr(size, ns);
+        if (a >= b)
+                return 1;
+
+        return 0;
+}
+
+static int of_bus_default_map(u32 *addr, const u32 *range,
+                              int na, int ns, int pna)
+{
+        u32 result[OF_MAX_ADDR_CELLS];
+        int i;
+
+        if (ns > 2) {
+                printk("of_device: Cannot handle size cells (%d) > 2.", ns);
+                return -EINVAL;
+        }
+
+        if (of_out_of_range(addr, range, range + na + pna, na, ns))
+                return -EINVAL;
+
+        /* Start with the parent range base.  */
+        memcpy(result, range + na, pna * 4);
+
+        /* Add in the child address offset.  */
+        for (i = 0; i < na; i++)
+                result[pna - 1 - i] +=
+                        (addr[na - 1 - i] -
+                         range[na - 1 - i]);
+
+        memcpy(addr, result, pna * 4);
+
+        return 0;
+}
+
+static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
+{
+        if (flags)
+                return flags;
+        return IORESOURCE_MEM;
+}
+
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+        if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) {
+                /* Do not do PCI specific frobbing if the
+                 * PCI bridge lacks a ranges property.  We
+                 * want to pass it through up to the next
+                 * parent as-is, not with the PCI translate
+                 * method which chops off the top address cell.
+                 */
+                if (!of_find_property(np, "ranges", NULL))
+                        return 0;
+
+                return 1;
+        }
+
+        return 0;
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+                                   int *addrc, int *sizec)
+{
+        if (addrc)
+                *addrc = 3;
+        if (sizec)
+                *sizec = 2;
+}
+
+static int of_bus_pci_map(u32 *addr, const u32 *range,
+                          int na, int ns, int pna)
+{
+        u32 result[OF_MAX_ADDR_CELLS];
+        int i;
+
+        /* Check address type match */
+        if ((addr[0] ^ range[0]) & 0x03000000)
+                return -EINVAL;
+
+        if (of_out_of_range(addr + 1, range + 1, range + na + pna,
+                            na - 1, ns))
+                return -EINVAL;
+
+        /* Start with the parent range base.  */
+        memcpy(result, range + na, pna * 4);
+
+        /* Add in the child address offset, skipping high cell.  */
+        for (i = 0; i < na - 1; i++)
+                result[pna - 1 - i] +=
+                        (addr[na - 1 - i] -
+                         range[na - 1 - i]);
+
+        memcpy(addr, result, pna * 4);
+
+        return 0;
+}
+
+static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
+{
+        u32 w = addr[0];
+
+        /* For PCI, we override whatever child busses may have used.  */
+        flags = 0;
+        switch((w >> 24) & 0x03) {
+        case 0x01:
+                flags |= IORESOURCE_IO;
+                break;
+
+        case 0x02: /* 32 bits */
+        case 0x03: /* 64 bits */
+                flags |= IORESOURCE_MEM;
+                break;
+        }
+        if (w & 0x40000000)
+                flags |= IORESOURCE_PREFETCH;
+        return flags;
+}
+
+/*
+ * SBUS bus specific translator
+ */
+
+static int of_bus_sbus_match(struct device_node *np)
+{
+        return !strcmp(np->name, "sbus") ||
+                !strcmp(np->name, "sbi");
+}
+
+static void of_bus_sbus_count_cells(struct device_node *child,
+                                   int *addrc, int *sizec)
+{
+        if (addrc)
+                *addrc = 2;
+        if (sizec)
+                *sizec = 1;
+}
+
+static int of_bus_sbus_map(u32 *addr, const u32 *range, int na, int ns, int pna)
+{
+        return of_bus_default_map(addr, range, na, ns, pna);
+}
+
+static unsigned long of_bus_sbus_get_flags(const u32 *addr, unsigned long flags)
+{
+        return IORESOURCE_MEM;
+}
+
+
+/*
+ * Array of bus specific translators
+ */
+
+static struct of_bus of_busses[] = {
+        /* PCI */
+        {
+                .name = "pci",
+                .addr_prop_name = "assigned-addresses",
+                .match = of_bus_pci_match,
+                .count_cells = of_bus_pci_count_cells,
+                .map = of_bus_pci_map,
+                .get_flags = of_bus_pci_get_flags,
+        },
+        /* SBUS */
+        {
+                .name = "sbus",
+                .addr_prop_name = "reg",
+                .match = of_bus_sbus_match,
+                .count_cells = of_bus_sbus_count_cells,
+                .map = of_bus_sbus_map,
+                .get_flags = of_bus_sbus_get_flags,
+        },
+        /* Default */
+        {
+                .name = "default",
+                .addr_prop_name = "reg",
+                .match = NULL,
+                .count_cells = of_bus_default_count_cells,
+                .map = of_bus_default_map,
+                .get_flags = of_bus_default_get_flags,
+        },
+};
+
+static struct of_bus *of_match_bus(struct device_node *np)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
+                if (!of_busses[i].match || of_busses[i].match(np))
+                        return &of_busses[i];
+        BUG();
+        return NULL;
+}
+
+static int __init build_one_resource(struct device_node *parent,
+                                     struct of_bus *bus,
+                                     struct of_bus *pbus,
+                                     u32 *addr,
+                                     int na, int ns, int pna)
+{
+        const u32 *ranges;
+        unsigned int rlen;
+        int rone;
+
+        ranges = of_get_property(parent, "ranges", &rlen);
+        if (ranges == NULL || rlen == 0) {
+                u32 result[OF_MAX_ADDR_CELLS];
+                int i;
+
+                memset(result, 0, pna * 4);
+                for (i = 0; i < na; i++)
+                        result[pna - 1 - i] =
+                                addr[na - 1 - i];
+
+                memcpy(addr, result, pna * 4);
+                return 0;
+        }
+
+        /* Now walk through the ranges */
+        rlen /= 4;
+        rone = na + pna + ns;
+        for (; rlen >= rone; rlen -= rone, ranges += rone) {
+                if (!bus->map(addr, ranges, na, ns, pna))
+                        return 0;
+        }
+
+        return 1;
+}
+
+static int __init use_1to1_mapping(struct device_node *pp)
+{
+        /* If we have a ranges property in the parent, use it.  */
+        if (of_find_property(pp, "ranges", NULL) != NULL)
+                return 0;
+
+        /* Some SBUS devices use intermediate nodes to express
+         * hierarchy within the device itself.  These aren't
+         * real bus nodes, and don't have a 'ranges' property.
+         * But, we should still pass the translation work up
+         * to the SBUS itself.
+         */
+        if (!strcmp(pp->name, "dma") ||
+            !strcmp(pp->name, "espdma") ||
+            !strcmp(pp->name, "ledma") ||
+            !strcmp(pp->name, "lebuffer"))
+                return 0;
+
+        return 1;
+}
+
+static int of_resource_verbose;
+
+static void __init build_device_resources(struct of_device *op,
+                                          struct device *parent)
+{
+        struct of_device *p_op;
+        struct of_bus *bus;
+        int na, ns;
+        int index, num_reg;
+        const void *preg;
+
+        if (!parent)
+                return;
+
+        p_op = to_of_device(parent);
+        bus = of_match_bus(p_op->node);
+        bus->count_cells(op->node, &na, &ns);
+
+        preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
+        if (!preg || num_reg == 0)
+                return;
+
+        /* Convert to num-cells.  */
+        num_reg /= 4;
+
+        /* Conver to num-entries.  */
+        num_reg /= na + ns;
+
+        for (index = 0; index < num_reg; index++) {
+                struct resource *r = &op->resource[index];
+                u32 addr[OF_MAX_ADDR_CELLS];
+                const u32 *reg = (preg + (index * ((na + ns) * 4)));
+                struct device_node *dp = op->node;
+                struct device_node *pp = p_op->node;
+                struct of_bus *pbus, *dbus;
+                u64 size, result = OF_BAD_ADDR;
+                unsigned long flags;
+                int dna, dns;
+                int pna, pns;
+
+                size = of_read_addr(reg + na, ns);
+
+                memcpy(addr, reg, na * 4);
+
+                flags = bus->get_flags(reg, 0);
+
+                if (use_1to1_mapping(pp)) {
+                        result = of_read_addr(addr, na);
+                        goto build_res;
+                }
+
+                dna = na;
+                dns = ns;
+                dbus = bus;
+
+                while (1) {
+                        dp = pp;
+                        pp = dp->parent;
+                        if (!pp) {
+                                result = of_read_addr(addr, dna);
+                                break;
+                        }
+
+                        pbus = of_match_bus(pp);
+                        pbus->count_cells(dp, &pna, &pns);
+
+                        if (build_one_resource(dp, dbus, pbus, addr,
+                                               dna, dns, pna))
+                                break;
+
+                        flags = pbus->get_flags(addr, flags);
+
+                        dna = pna;
+                        dns = pns;
+                        dbus = pbus;
+                }
+
+        build_res:
+                memset(r, 0, sizeof(*r));
+
+                if (of_resource_verbose)
+                        printk("%s reg[%d] -> %llx\n",
+                               op->node->full_name, index,
+                               result);
+
+                if (result != OF_BAD_ADDR) {
+                        r->start = result & 0xffffffff;
+                        r->end = result + size - 1;
+                        r->flags = flags | ((result >> 32ULL) & 0xffUL);
+                }
+                r->name = op->node->name;
+        }
+}
+
+static struct of_device * __init scan_one_device(struct device_node *dp,
+                                                 struct device *parent)
+{
+        struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
+        const struct linux_prom_irqs *intr;
+        struct dev_archdata *sd;
+        int len, i;
+
+        if (!op)
+                return NULL;
+
+        sd = &op->dev.archdata;
+        sd->prom_node = dp;
+        sd->op = op;
+
+        op->node = dp;
+
+        op->clock_freq = of_getintprop_default(dp, "clock-frequency",
+                                               (25*1000*1000));
+        op->portid = of_getintprop_default(dp, "upa-portid", -1);
+        if (op->portid == -1)
+                op->portid = of_getintprop_default(dp, "portid", -1);
+
+        intr = of_get_property(dp, "intr", &len);
+        if (intr) {
+                op->num_irqs = len / sizeof(struct linux_prom_irqs);
+                for (i = 0; i < op->num_irqs; i++)
+                        op->irqs[i] = intr[i].pri;
+        } else {
+                const unsigned int *irq =
+                        of_get_property(dp, "interrupts", &len);
+
+                if (irq) {
+                        op->num_irqs = len / sizeof(unsigned int);
+                        for (i = 0; i < op->num_irqs; i++)
+                                op->irqs[i] = irq[i];
+                } else {
+                        op->num_irqs = 0;
+                }
+        }
+        if (sparc_cpu_model == sun4d) {
+                static int pil_to_sbus[] = {
+                        0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
+                };
+                struct device_node *io_unit, *sbi = dp->parent;
+                const struct linux_prom_registers *regs;
+                int board, slot;
+
+                while (sbi) {
+                        if (!strcmp(sbi->name, "sbi"))
+                                break;
+
+                        sbi = sbi->parent;
+                }
+                if (!sbi)
+                        goto build_resources;
+
+                regs = of_get_property(dp, "reg", NULL);
+                if (!regs)
+                        goto build_resources;
+
+                slot = regs->which_io;
+
+                /* If SBI's parent is not io-unit or the io-unit lacks
+                 * a "board#" property, something is very wrong.
+                 */
+                if (!sbi->parent || strcmp(sbi->parent->name, "io-unit")) {
+                        printk("%s: Error, parent is not io-unit.\n",
+                               sbi->full_name);
+                        goto build_resources;
+                }
+                io_unit = sbi->parent;
+                board = of_getintprop_default(io_unit, "board#", -1);
+                if (board == -1) {
+                        printk("%s: Error, lacks board# property.\n",
+                               io_unit->full_name);
+                        goto build_resources;
+                }
+
+                for (i = 0; i < op->num_irqs; i++) {
+                        int this_irq = op->irqs[i];
+                        int sbusl = pil_to_sbus[this_irq];
+
+                        if (sbusl)
+                                this_irq = (((board + 1) << 5) +
+                                            (sbusl << 2) +
+                                            slot);
+
+                        op->irqs[i] = this_irq;
+                }
+        }
+
+build_resources:
+        build_device_resources(op, parent);
+
+        op->dev.parent = parent;
+        op->dev.bus = &of_platform_bus_type;
+        if (!parent)
+                dev_set_name(&op->dev, "root");
+        else
+                dev_set_name(&op->dev, "%08x", dp->node);
+
+        if (of_device_register(op)) {
+                printk("%s: Could not register of device.\n",
+                       dp->full_name);
+                kfree(op);
+                op = NULL;
+        }
+
+        return op;
+}
+
+static void __init scan_tree(struct device_node *dp, struct device *parent)
+{
+        while (dp) {
+                struct of_device *op = scan_one_device(dp, parent);
+
+                if (op)
+                        scan_tree(dp->child, &op->dev);
+
+                dp = dp->sibling;
+        }
+}
+
+static void __init scan_of_devices(void)
+{
+        struct device_node *root = of_find_node_by_path("/");
+        struct of_device *parent;
+
+        parent = scan_one_device(root, NULL);
+        if (!parent)
+                return;
+
+        scan_tree(root->child, &parent->dev);
+}
+
+static int __init of_bus_driver_init(void)
+{
+        int err;
+
+        err = of_bus_type_init(&of_platform_bus_type, "of");
+        if (!err)
+                scan_of_devices();
+
+        return err;
+}
+
+postcore_initcall(of_bus_driver_init);
+
+static int __init of_debug(char *str)
+{
+        int val = 0;
+
+        get_option(&str, &val);
+        if (val & 1)
+                of_resource_verbose = 1;
+        return 1;
+}
+
+__setup("of_debug=", of_debug);