[PATCH 2/2] OF: move prom_parse to drivers/of folder
From: monstr
Date: Sat May 03 2008 - 11:13:34 EST
From: Michal Simek <monstr@xxxxxxxxx>
Signed-off-by: Michal Simek <monstr@xxxxxxxxx>
---
arch/powerpc/kernel/Makefile | 1 -
arch/powerpc/kernel/prom_parse.c | 1075 --------------------------------------
drivers/of/Makefile | 2 +-
drivers/of/prom_parse.c | 1075 ++++++++++++++++++++++++++++++++++++++
4 files changed, 1076 insertions(+), 1077 deletions(-)
delete mode 100644 arch/powerpc/kernel/prom_parse.c
create mode 100644 drivers/of/prom_parse.c
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index b169b23..7617555 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -25,7 +25,6 @@ obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
obj-$(CONFIG_PPC64) += vdso64/
obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
-obj-$(CONFIG_PPC_OF) += prom_parse.o
obj-$(CONFIG_PPC_CLOCK) += clock.o
procfs-$(CONFIG_PPC64) := proc_ppc64.o
obj-$(CONFIG_PROC_FS) += $(procfs-y)
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
deleted file mode 100644
index 7c6b07c..0000000
--- a/arch/powerpc/kernel/prom_parse.c
+++ /dev/null
@@ -1,1075 +0,0 @@
-#undef DEBUG
-
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/pci_regs.h>
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/etherdevice.h>
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-
-#ifdef CONFIG_PPC64
-#define PRu64 "%lx"
-#else
-#define PRu64 "%llx"
-#endif
-
-/* Max address size we deal with */
-#define OF_MAX_ADDR_CELLS 4
-#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
- (ns) > 0)
-
-static struct of_bus *of_match_bus(struct device_node *np);
-static int __of_address_to_resource(struct device_node *dev,
- const u32 *addrp, u64 size, unsigned int flags,
- struct resource *r);
-
-/* Debug utility */
-#ifdef DEBUG
-static void of_dump_addr(const char *s, const u32 *addr, int na)
-{
- printk(KERN_INFO "%s", s);
- while (na--)
- printk(KERN_INFO " %08x", *(addr++));
- printk(KERN_INFO "\n");
-}
-#else
-static void of_dump_addr(const char *s, const u32 *addr, int na) { }
-#endif
-
-/* Callbacks for bus specific translators */
-struct of_bus {
- const char *name;
- const char *addresses;
- int (*match)(struct device_node *parent);
- void (*count_cells)(struct device_node *child,
- int *addrc, int *sizec);
- u64 (*map)(u32 *addr, const u32 *range,
- int na, int ns, int pna);
- int (*translate)(u32 *addr, u64 offset, int na);
- unsigned int (*get_flags)(const u32 *addr);
-};
-
-
-/*
- * Default translator (generic bus)
- */
-
-static void of_bus_default_count_cells(struct device_node *dev,
- int *addrc, int *sizec)
-{
- if (addrc)
- *addrc = of_n_addr_cells(dev);
- if (sizec)
- *sizec = of_n_size_cells(dev);
-}
-
-static u64 of_bus_default_map(u32 *addr, const u32 *range,
- int na, int ns, int pna)
-{
- u64 cp, s, da;
-
- cp = of_read_number(range, na);
- s = of_read_number(range + na + pna, ns);
- da = of_read_number(addr, na);
-
- pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
- cp, s, da);
-
- if (da < cp || da >= (cp + s))
- return OF_BAD_ADDR;
- return da - cp;
-}
-
-static int of_bus_default_translate(u32 *addr, u64 offset, int na)
-{
- u64 a = of_read_number(addr, na);
- memset(addr, 0, na * 4);
- a += offset;
- if (na > 1)
- addr[na - 2] = a >> 32;
- addr[na - 1] = a & 0xffffffffu;
-
- return 0;
-}
-
-static unsigned int of_bus_default_get_flags(const u32 *addr)
-{
- return IORESOURCE_MEM;
-}
-
-#ifdef CONFIG_PCI
-/*
- * PCI bus specific translator
- */
-
-static int of_bus_pci_match(struct device_node *np)
-{
- /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
- return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
-}
-
-static void of_bus_pci_count_cells(struct device_node *np,
- int *addrc, int *sizec)
-{
- if (addrc)
- *addrc = 3;
- if (sizec)
- *sizec = 2;
-}
-
-static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
-{
- u64 cp, s, da;
-
- /* Check address type match */
- if ((addr[0] ^ range[0]) & 0x03000000)
- return OF_BAD_ADDR;
-
- /* Read address values, skipping high cell */
- cp = of_read_number(range + 1, na - 1);
- s = of_read_number(range + na + pna, ns);
- da = of_read_number(addr + 1, na - 1);
-
- pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
-
- if (da < cp || da >= (cp + s))
- return OF_BAD_ADDR;
- return da - cp;
-}
-
-static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
-{
- return of_bus_default_translate(addr + 1, offset, na - 1);
-}
-
-static unsigned int of_bus_pci_get_flags(const u32 *addr)
-{
- unsigned int flags = 0;
- u32 w = addr[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;
-}
-
-const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
- unsigned int *flags)
-{
- const u32 *prop;
- unsigned int psize;
- struct device_node *parent;
- struct of_bus *bus;
- int onesize, i, na, ns;
-
- /* Get parent & match bus type */
- parent = of_get_parent(dev);
- if (parent == NULL)
- return NULL;
- bus = of_match_bus(parent);
- if (strcmp(bus->name, "pci")) {
- of_node_put(parent);
- return NULL;
- }
- bus->count_cells(dev, &na, &ns);
- of_node_put(parent);
- if (!OF_CHECK_COUNTS(na, ns))
- return NULL;
-
- /* Get "reg" or "assigned-addresses" property */
- prop = of_get_property(dev, bus->addresses, &psize);
- if (prop == NULL)
- return NULL;
- psize /= 4;
-
- onesize = na + ns;
- for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
- if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
- if (size)
- *size = of_read_number(prop + na, ns);
- if (flags)
- *flags = bus->get_flags(prop);
- return prop;
- }
- return NULL;
-}
-EXPORT_SYMBOL(of_get_pci_address);
-
-int of_pci_address_to_resource(struct device_node *dev, int bar,
- struct resource *r)
-{
- const u32 *addrp;
- u64 size;
- unsigned int flags;
-
- addrp = of_get_pci_address(dev, bar, &size, &flags);
- if (addrp == NULL)
- return -EINVAL;
- return __of_address_to_resource(dev, addrp, size, flags, r);
-}
-EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
-
-static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
-{
- return (((pin - 1) + slot) % 4) + 1;
-}
-
-int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
-{
- struct device_node *dn, *ppnode;
- struct pci_dev *ppdev;
- u32 lspec;
- u32 laddr[3];
- u8 pin;
- int rc;
-
- /* Check if we have a device node, if yes, fallback to standard OF
- * parsing
- */
- dn = pci_device_to_OF_node(pdev);
- if (dn)
- return of_irq_map_one(dn, 0, out_irq);
-
- /* Ok, we don't, time to have fun. Let's start by building up an
- * interrupt spec. we assume #interrupt-cells is 1, which is standard
- * for PCI. If you do different, then don't use that routine.
- */
- rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
- if (rc != 0)
- return rc;
- /* No pin, exit */
- if (pin == 0)
- return -ENODEV;
-
- /* Now we walk up the PCI tree */
- lspec = pin;
- for (;;) {
- /* Get the pci_dev of our parent */
- ppdev = pdev->bus->self;
-
- /* Ouch, it's a host bridge... */
- if (ppdev == NULL) {
-#ifdef CONFIG_PPC64
- ppnode = pci_bus_to_OF_node(pdev->bus);
-#else
- struct pci_controller *host;
- host = pci_bus_to_host(pdev->bus);
- ppnode = host ? host->dn : NULL;
-#endif
- /* No node for host bridge ? give up */
- if (ppnode == NULL)
- return -EINVAL;
- } else
- /* We found a P2P bridge, check if it has a node */
- ppnode = pci_device_to_OF_node(ppdev);
-
- /* Ok, we have found a parent with a device-node, hand over to
- * the OF parsing code.
- * We build a unit address from the linux device to be used for
- * resolution. Note that we use the linux bus number which may
- * not match your firmware bus numbering.
- * Fortunately, in most cases, interrupt-map-mask doesn't include
- * the bus number as part of the matching.
- * You should still be careful about that though if you intend
- * to rely on this function (you ship a firmware that doesn't
- * create device nodes for all PCI devices).
- */
- if (ppnode)
- break;
-
- /* We can only get here if we hit a P2P bridge with no node,
- * let's do standard swizzling and try again
- */
- lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
- pdev = ppdev;
- }
-
- laddr[0] = (pdev->bus->number << 16)
- | (pdev->devfn << 8);
- laddr[1] = laddr[2] = 0;
- return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
-}
-EXPORT_SYMBOL_GPL(of_irq_map_pci);
-#endif /* CONFIG_PCI */
-
-/*
- * ISA bus specific translator
- */
-
-static int of_bus_isa_match(struct device_node *np)
-{
- return !strcmp(np->name, "isa");
-}
-
-static void of_bus_isa_count_cells(struct device_node *child,
- int *addrc, int *sizec)
-{
- if (addrc)
- *addrc = 2;
- if (sizec)
- *sizec = 1;
-}
-
-static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
-{
- u64 cp, s, da;
-
- /* Check address type match */
- if ((addr[0] ^ range[0]) & 0x00000001)
- return OF_BAD_ADDR;
-
- /* Read address values, skipping high cell */
- cp = of_read_number(range + 1, na - 1);
- s = of_read_number(range + na + pna, ns);
- da = of_read_number(addr + 1, na - 1);
-
- pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
-
- if (da < cp || da >= (cp + s))
- return OF_BAD_ADDR;
- return da - cp;
-}
-
-static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
-{
- return of_bus_default_translate(addr + 1, offset, na - 1);
-}
-
-static unsigned int of_bus_isa_get_flags(const u32 *addr)
-{
- unsigned int flags = 0;
- u32 w = addr[0];
-
- if (w & 1)
- flags |= IORESOURCE_IO;
- else
- flags |= IORESOURCE_MEM;
- return flags;
-}
-
-/*
- * Array of bus specific translators
- */
-static struct of_bus of_busses[] = {
-#ifdef CONFIG_PCI
- /* PCI */
- {
- .name = "pci",
- .addresses = "assigned-addresses",
- .match = of_bus_pci_match,
- .count_cells = of_bus_pci_count_cells,
- .map = of_bus_pci_map,
- .translate = of_bus_pci_translate,
- .get_flags = of_bus_pci_get_flags,
- },
-#endif /* CONFIG_PCI */
- /* ISA */
- {
- .name = "isa",
- .addresses = "reg",
- .match = of_bus_isa_match,
- .count_cells = of_bus_isa_count_cells,
- .map = of_bus_isa_map,
- .translate = of_bus_isa_translate,
- .get_flags = of_bus_isa_get_flags,
- },
- /* Default */
- {
- .name = "default",
- .addresses = "reg",
- .match = NULL,
- .count_cells = of_bus_default_count_cells,
- .map = of_bus_default_map,
- .translate = of_bus_default_translate,
- .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 of_translate_one(struct device_node *parent, struct of_bus *bus,
- struct of_bus *pbus, u32 *addr,
- int na, int ns, int pna, const char *rprop)
-{
- const u32 *ranges;
- unsigned int rlen;
- int rone;
- u64 offset = OF_BAD_ADDR;
-
- /* Normally, an absence of a "ranges" property means we are
- * crossing a non-translatable boundary, and thus the addresses
- * below the current not cannot be converted to CPU physical ones.
- * Unfortunately, while this is very clear in the spec, it's not
- * what Apple understood, and they do have things like /uni-n or
- * /ht nodes with no "ranges" property and a lot of perfectly
- * useable mapped devices below them. Thus we treat the absence of
- * "ranges" as equivalent to an empty "ranges" property which means
- * a 1:1 translation at that level. It's up to the caller not to try
- * to translate addresses that aren't supposed to be translated in
- * the first place. --BenH.
- */
- ranges = of_get_property(parent, rprop, &rlen);
- if (ranges == NULL || rlen == 0) {
- offset = of_read_number(addr, na);
- memset(addr, 0, pna * 4);
- pr_debug("OF: no ranges, 1:1 translation\n");
- goto finish;
- }
-
- pr_debug("OF: walking ranges...\n");
-
- /* Now walk through the ranges */
- rlen /= 4;
- rone = na + pna + ns;
- for (; rlen >= rone; rlen -= rone, ranges += rone) {
- offset = bus->map(addr, ranges, na, ns, pna);
- if (offset != OF_BAD_ADDR)
- break;
- }
- if (offset == OF_BAD_ADDR) {
- pr_debug("OF: not found !\n");
- return 1;
- }
- memcpy(addr, ranges + na, 4 * pna);
-
- finish:
- of_dump_addr("OF: parent translation for:", addr, pna);
- pr_debug("OF: with offset: "PRu64"\n", offset);
-
- /* Translate it into parent bus space */
- return pbus->translate(addr, offset, pna);
-}
-
-/*
- * Translate an address from the device-tree into a CPU physical address,
- * this walks up the tree and applies the various bus mappings on the
- * way.
- *
- * Note: We consider that crossing any level with #size-cells == 0 to mean
- * that translation is impossible (that is we are not dealing with a value
- * that can be mapped to a cpu physical address). This is not really specified
- * that way, but this is traditionally the way IBM at least do things
- */
-u64 __of_translate_address(struct device_node *dev, const u32 *in_addr,
- const char *rprop)
-{
- struct device_node *parent = NULL;
- struct of_bus *bus, *pbus;
- u32 addr[OF_MAX_ADDR_CELLS];
- int na, ns, pna, pns;
- u64 result = OF_BAD_ADDR;
-
- pr_debug("OF: ** translation for device %s **\n", dev->full_name);
-
- /* Increase refcount at current level */
- of_node_get(dev);
-
- /* Get parent & match bus type */
- parent = of_get_parent(dev);
- if (parent == NULL)
- goto bail;
- bus = of_match_bus(parent);
-
- /* Cound address cells & copy address locally */
- bus->count_cells(dev, &na, &ns);
- if (!OF_CHECK_COUNTS(na, ns)) {
- printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
- dev->full_name);
- goto bail;
- }
- memcpy(addr, in_addr, na * 4);
-
- pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
- bus->name, na, ns, parent->full_name);
- of_dump_addr("OF: translating address:", addr, na);
-
- /* Translate */
- for (;;) {
- /* Switch to parent bus */
- of_node_put(dev);
- dev = parent;
- parent = of_get_parent(dev);
-
- /* If root, we have finished */
- if (parent == NULL) {
- pr_debug("OF: reached root node\n");
- result = of_read_number(addr, na);
- break;
- }
-
- /* Get new parent bus and counts */
- pbus = of_match_bus(parent);
- pbus->count_cells(dev, &pna, &pns);
- if (!OF_CHECK_COUNTS(pna, pns)) {
- printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
- dev->full_name);
- break;
- }
-
- pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
- pbus->name, pna, pns, parent->full_name);
-
- /* Apply bus translation */
- if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop))
- break;
-
- /* Complete the move up one level */
- na = pna;
- ns = pns;
- bus = pbus;
-
- of_dump_addr("OF: one level translation:", addr, na);
- }
- bail:
- of_node_put(parent);
- of_node_put(dev);
-
- return result;
-}
-
-u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
-{
- return __of_translate_address(dev, in_addr, "ranges");
-}
-EXPORT_SYMBOL(of_translate_address);
-
-u64 of_translate_dma_address(struct device_node *dev, const u32 *in_addr)
-{
- return __of_translate_address(dev, in_addr, "dma-ranges");
-}
-EXPORT_SYMBOL(of_translate_dma_address);
-
-const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
- unsigned int *flags)
-{
- const u32 *prop;
- unsigned int psize;
- struct device_node *parent;
- struct of_bus *bus;
- int onesize, i, na, ns;
-
- /* Get parent & match bus type */
- parent = of_get_parent(dev);
- if (parent == NULL)
- return NULL;
- bus = of_match_bus(parent);
- bus->count_cells(dev, &na, &ns);
- of_node_put(parent);
- if (!OF_CHECK_COUNTS(na, ns))
- return NULL;
-
- /* Get "reg" or "assigned-addresses" property */
- prop = of_get_property(dev, bus->addresses, &psize);
- if (prop == NULL)
- return NULL;
- psize /= 4;
-
- onesize = na + ns;
- for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
- if (i == index) {
- if (size)
- *size = of_read_number(prop + na, ns);
- if (flags)
- *flags = bus->get_flags(prop);
- return prop;
- }
- return NULL;
-}
-EXPORT_SYMBOL(of_get_address);
-
-static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
- u64 size, unsigned int flags,
- struct resource *r)
-{
- u64 taddr;
-
- if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
- return -EINVAL;
- taddr = of_translate_address(dev, addrp);
- if (taddr == OF_BAD_ADDR)
- return -EINVAL;
- memset(r, 0, sizeof(struct resource));
- if (flags & IORESOURCE_IO) {
- unsigned long port;
-#ifdef CONFIG_PCI
- port = pci_address_to_pio(taddr);
-#else
- port = -1;
-#endif
- if (port == (unsigned long)-1)
- return -EINVAL;
- r->start = port;
- r->end = port + size - 1;
- } else {
- r->start = taddr;
- r->end = taddr + size - 1;
- }
- r->flags = flags;
- r->name = dev->name;
- return 0;
-}
-
-int of_address_to_resource(struct device_node *dev, int index,
- struct resource *r)
-{
- const u32 *addrp;
- u64 size;
- unsigned int flags;
-
- addrp = of_get_address(dev, index, &size, &flags);
- if (addrp == NULL)
- return -EINVAL;
- return __of_address_to_resource(dev, addrp, size, flags, r);
-}
-EXPORT_SYMBOL_GPL(of_address_to_resource);
-
-void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
- unsigned long *busno, unsigned long *phys, unsigned long *size)
-{
- const u32 *dma_window;
- u32 cells;
- const unsigned char *prop;
-
- dma_window = dma_window_prop;
-
- /* busno is always one cell */
- *busno = *(dma_window++);
-
- prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
- if (!prop)
- prop = of_get_property(dn, "#address-cells", NULL);
-
- cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
- *phys = of_read_number(dma_window, cells);
-
- dma_window += cells;
-
- prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
- cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
- *size = of_read_number(dma_window, cells);
-}
-
-/*
- * Interrupt remapper
- */
-
-static unsigned int of_irq_workarounds;
-static struct device_node *of_irq_dflt_pic;
-
-static struct device_node *of_irq_find_parent(struct device_node *child)
-{
- struct device_node *p;
- const phandle *parp;
-
- if (!of_node_get(child))
- return NULL;
-
- do {
- parp = of_get_property(child, "interrupt-parent", NULL);
- if (parp == NULL)
- p = of_get_parent(child);
- else {
- if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
- p = of_node_get(of_irq_dflt_pic);
- else
- p = of_find_node_by_phandle(*parp);
- }
- of_node_put(child);
- child = p;
- } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
-
- return p;
-}
-
-/* This doesn't need to be called if you don't have any special workaround
- * flags to pass
- */
-void of_irq_map_init(unsigned int flags)
-{
- of_irq_workarounds = flags;
-
- /* OldWorld, don't bother looking at other things */
- if (flags & OF_IMAP_OLDWORLD_MAC)
- return;
-
- /* If we don't have phandles, let's try to locate a default interrupt
- * controller (happens when booting with BootX). We do a first match
- * here, hopefully, that only ever happens on machines with one
- * controller.
- */
- if (flags & OF_IMAP_NO_PHANDLE) {
- struct device_node *np;
-
- for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
- if (of_get_property(np, "interrupt-controller", NULL)
- == NULL)
- continue;
- /* Skip /chosen/interrupt-controller */
- if (strcmp(np->name, "chosen") == 0)
- continue;
- /* It seems like at least one person on this planet wants
- * to use BootX on a machine with an AppleKiwi controller
- * which happens to pretend to be an interrupt
- * controller too.
- */
- if (strcmp(np->name, "AppleKiwi") == 0)
- continue;
- /* I think we found one ! */
- of_irq_dflt_pic = np;
- break;
- }
- }
-
-}
-
-int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
- const u32 *addr, struct of_irq *out_irq)
-{
- struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
- const u32 *tmp, *imap, *imask;
- u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
- int imaplen, match, i;
-
- pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
- "ointsize=%d\n",
- parent->full_name, intspec[0], intspec[1], ointsize);
-
- ipar = of_node_get(parent);
-
- /* First get the #interrupt-cells property of the current cursor
- * that tells us how to interpret the passed-in intspec. If there
- * is none, we are nice and just walk up the tree
- */
- do {
- tmp = of_get_property(ipar, "#interrupt-cells", NULL);
- if (tmp != NULL) {
- intsize = *tmp;
- break;
- }
- tnode = ipar;
- ipar = of_irq_find_parent(ipar);
- of_node_put(tnode);
- } while (ipar);
- if (ipar == NULL) {
- pr_debug(" -> no parent found !\n");
- goto fail;
- }
-
- pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
- ipar->full_name, intsize);
-
- if (ointsize != intsize)
- return -EINVAL;
-
- /* Look for this #address-cells. We have to implement the old linux
- * trick of looking for the parent here as some device-trees rely on it
- */
- old = of_node_get(ipar);
- do {
- tmp = of_get_property(old, "#address-cells", NULL);
- tnode = of_get_parent(old);
- of_node_put(old);
- old = tnode;
- } while (old && tmp == NULL);
- of_node_put(old);
- old = NULL;
- addrsize = (tmp == NULL) ? 2 : *tmp;
-
- pr_debug(" -> addrsize=%d\n", addrsize);
-
- /* Now start the actual "proper" walk of the interrupt tree */
- while (ipar != NULL) {
- /* Now check if cursor is an interrupt-controller and if it is
- * then we are done
- */
- if (of_get_property(ipar, "interrupt-controller", NULL) !=
- NULL) {
- pr_debug(" -> got it !\n");
- memcpy(out_irq->specifier,
- intspec, intsize * sizeof(u32));
- out_irq->size = intsize;
- out_irq->controller = ipar;
- of_node_put(old);
- return 0;
- }
-
- /* Now look for an interrupt-map */
- imap = of_get_property(ipar, "interrupt-map", &imaplen);
- /* No interrupt map, check for an interrupt parent */
- if (imap == NULL) {
- pr_debug(" -> no map, getting parent\n");
- newpar = of_irq_find_parent(ipar);
- goto skiplevel;
- }
- imaplen /= sizeof(u32);
-
- /* Look for a mask */
- imask = of_get_property(ipar, "interrupt-map-mask", NULL);
-
- /* If we were passed no "reg" property and we attempt to parse
- * an interrupt-map, then #address-cells must be 0.
- * Fail if it's not.
- */
- if (addr == NULL && addrsize != 0) {
- pr_debug(" -> no reg passed in when needed !\n");
- goto fail;
- }
-
- /* Parse interrupt-map */
- match = 0;
- while (imaplen > (addrsize + intsize + 1) && !match) {
- /* Compare specifiers */
- match = 1;
- for (i = 0; i < addrsize && match; ++i) {
- u32 mask = imask ? imask[i] : 0xffffffffu;
- match = ((addr[i] ^ imap[i]) & mask) == 0;
- }
- for (; i < (addrsize + intsize) && match; ++i) {
- u32 mask = imask ? imask[i] : 0xffffffffu;
- match =
- ((intspec[i-addrsize] ^ imap[i]) & mask) == 0;
- }
- imap += addrsize + intsize;
- imaplen -= addrsize + intsize;
-
- pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
-
- /* Get the interrupt parent */
- if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
- newpar = of_node_get(of_irq_dflt_pic);
- else
- newpar = of_find_node_by_phandle((phandle)*imap);
- imap++;
- --imaplen;
-
- /* Check if not found */
- if (newpar == NULL) {
- pr_debug(" -> imap parent not found !\n");
- goto fail;
- }
-
- /* Get #interrupt-cells and #address-cells of new
- * parent
- */
- tmp = of_get_property(newpar, "#interrupt-cells", NULL);
- if (tmp == NULL) {
- pr_debug(" -> parent lacks #interrupt-cells !\n");
- goto fail;
- }
- newintsize = *tmp;
- tmp = of_get_property(newpar, "#address-cells", NULL);
- newaddrsize = (tmp == NULL) ? 0 : *tmp;
-
- pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
- newintsize, newaddrsize);
-
- /* Check for malformed properties */
- if (imaplen < (newaddrsize + newintsize))
- goto fail;
-
- imap += newaddrsize + newintsize;
- imaplen -= newaddrsize + newintsize;
-
- pr_debug(" -> imaplen=%d\n", imaplen);
- }
- if (!match)
- goto fail;
-
- of_node_put(old);
- old = of_node_get(newpar);
- addrsize = newaddrsize;
- intsize = newintsize;
- intspec = imap - intsize;
- addr = intspec - addrsize;
-
- skiplevel:
- /* Iterate again with new parent */
- pr_debug(" -> new parent: %s\n", newpar ? newpar->full_name : "<>");
- of_node_put(ipar);
- ipar = newpar;
- newpar = NULL;
- }
-fail:
- of_node_put(ipar);
- of_node_put(old);
- of_node_put(newpar);
-
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(of_irq_map_raw);
-
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
-static int of_irq_map_oldworld(struct device_node *device, int index,
- struct of_irq *out_irq)
-{
- const u32 *ints = NULL;
- int intlen;
-
- /*
- * Old machines just have a list of interrupt numbers
- * and no interrupt-controller nodes. We also have dodgy
- * cases where the APPL,interrupts property is completely
- * missing behind pci-pci bridges and we have to get it
- * from the parent (the bridge itself, as apple just wired
- * everything together on these)
- */
- while (device) {
- ints = of_get_property(device, "AAPL,interrupts", &intlen);
- if (ints != NULL)
- break;
- device = device->parent;
- if (device && strcmp(device->type, "pci") != 0)
- break;
- }
- if (ints == NULL)
- return -EINVAL;
- intlen /= sizeof(u32);
-
- if (index >= intlen)
- return -EINVAL;
-
- out_irq->controller = NULL;
- out_irq->specifier[0] = ints[index];
- out_irq->size = 1;
-
- return 0;
-}
-#else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */
-static int of_irq_map_oldworld(struct device_node *device, int index,
- struct of_irq *out_irq)
-{
- return -EINVAL;
-}
-#endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */
-
-int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq)
-{
- struct device_node *p;
- const u32 *intspec, *tmp, *addr;
- u32 intsize, intlen;
- int res;
-
- pr_debug("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index);
-
- /* OldWorld mac stuff is "special", handle out of line */
- if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
- return of_irq_map_oldworld(device, index, out_irq);
-
- /* Get the interrupts property */
- intspec = of_get_property(device, "interrupts", &intlen);
- if (intspec == NULL)
- return -EINVAL;
- intlen /= sizeof(u32);
-
- /* Get the reg property (if any) */
- addr = of_get_property(device, "reg", NULL);
-
- /* Look for the interrupt parent. */
- p = of_irq_find_parent(device);
- if (p == NULL)
- return -EINVAL;
-
- /* Get size of interrupt specifier */
- tmp = of_get_property(p, "#interrupt-cells", NULL);
- if (tmp == NULL) {
- of_node_put(p);
- return -EINVAL;
- }
- intsize = *tmp;
-
- pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
-
- /* Check index */
- if ((index + 1) * intsize > intlen)
- return -EINVAL;
-
- /* Get new specifier and map it */
- res = of_irq_map_raw(p, intspec + index * intsize, intsize,
- addr, out_irq);
- of_node_put(p);
- return res;
-}
-EXPORT_SYMBOL_GPL(of_irq_map_one);
-
-/**
- * Search the device tree for the best MAC address to use. 'mac-address' is
- * checked first, because that is supposed to contain to "most recent" MAC
- * address. If that isn't set, then 'local-mac-address' is checked next,
- * because that is the default address. If that isn't set, then the obsolete
- * 'address' is checked, just in case we're using an old device tree.
- *
- * Note that the 'address' property is supposed to contain a virtual address of
- * the register set, but some DTS files have redefined that property to be the
- * MAC address.
- *
- * All-zero MAC addresses are rejected, because those could be properties that
- * exist in the device tree, but were not set by U-Boot. For example, the
- * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
- * addresses. Some older U-Boots only initialized 'local-mac-address'. In
- * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
- * but is all zeros.
-*/
-const void *of_get_mac_address(struct device_node *np)
-{
- struct property *pp;
-
- pp = of_find_property(np, "mac-address", NULL);
- if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
- return pp->value;
-
- pp = of_find_property(np, "local-mac-address", NULL);
- if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
- return pp->value;
-
- pp = of_find_property(np, "address", NULL);
- if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
- return pp->value;
-
- return NULL;
-}
-EXPORT_SYMBOL(of_get_mac_address);
-
-int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
-{
- int irq = irq_of_parse_and_map(dev, index);
-
- /* Only dereference the resource if both the
- * resource and the irq are valid. */
- if (r && irq != NO_IRQ) {
- r->start = r->end = irq;
- r->flags = IORESOURCE_IRQ;
- }
-
- return irq;
-}
-EXPORT_SYMBOL_GPL(of_irq_to_resource);
-
-void __iomem *of_iomap(struct device_node *np, int index)
-{
- struct resource res;
-
- if (of_address_to_resource(np, index, &res))
- return NULL;
-
- return ioremap(res.start, 1 + res.end - res.start);
-}
-EXPORT_SYMBOL(of_iomap);
diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index e18eb8a..6aa78cd 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -1,4 +1,4 @@
-obj-y = base.o of_device.o of_platform.o
+obj-y = base.o of_device.o of_platform.o prom_parse.o
obj-$(CONFIG_OF_DEVICE) += device.o platform.o
obj-$(CONFIG_OF_GPIO) += gpio.o
obj-$(CONFIG_OF_I2C) += of_i2c.o
diff --git a/drivers/of/prom_parse.c b/drivers/of/prom_parse.c
new file mode 100644
index 0000000..7c6b07c
--- /dev/null
+++ b/drivers/of/prom_parse.c
@@ -0,0 +1,1075 @@
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/pci_regs.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/etherdevice.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+
+#ifdef CONFIG_PPC64
+#define PRu64 "%lx"
+#else
+#define PRu64 "%llx"
+#endif
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS 4
+#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
+ (ns) > 0)
+
+static struct of_bus *of_match_bus(struct device_node *np);
+static int __of_address_to_resource(struct device_node *dev,
+ const u32 *addrp, u64 size, unsigned int flags,
+ struct resource *r);
+
+/* Debug utility */
+#ifdef DEBUG
+static void of_dump_addr(const char *s, const u32 *addr, int na)
+{
+ printk(KERN_INFO "%s", s);
+ while (na--)
+ printk(KERN_INFO " %08x", *(addr++));
+ printk(KERN_INFO "\n");
+}
+#else
+static void of_dump_addr(const char *s, const u32 *addr, int na) { }
+#endif
+
+/* Callbacks for bus specific translators */
+struct of_bus {
+ const char *name;
+ const char *addresses;
+ int (*match)(struct device_node *parent);
+ void (*count_cells)(struct device_node *child,
+ int *addrc, int *sizec);
+ u64 (*map)(u32 *addr, const u32 *range,
+ int na, int ns, int pna);
+ int (*translate)(u32 *addr, u64 offset, int na);
+ unsigned int (*get_flags)(const u32 *addr);
+};
+
+
+/*
+ * Default translator (generic bus)
+ */
+
+static void of_bus_default_count_cells(struct device_node *dev,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = of_n_addr_cells(dev);
+ if (sizec)
+ *sizec = of_n_size_cells(dev);
+}
+
+static u64 of_bus_default_map(u32 *addr, const u32 *range,
+ int na, int ns, int pna)
+{
+ u64 cp, s, da;
+
+ cp = of_read_number(range, na);
+ s = of_read_number(range + na + pna, ns);
+ da = of_read_number(addr, na);
+
+ pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
+ cp, s, da);
+
+ if (da < cp || da >= (cp + s))
+ return OF_BAD_ADDR;
+ return da - cp;
+}
+
+static int of_bus_default_translate(u32 *addr, u64 offset, int na)
+{
+ u64 a = of_read_number(addr, na);
+ memset(addr, 0, na * 4);
+ a += offset;
+ if (na > 1)
+ addr[na - 2] = a >> 32;
+ addr[na - 1] = a & 0xffffffffu;
+
+ return 0;
+}
+
+static unsigned int of_bus_default_get_flags(const u32 *addr)
+{
+ return IORESOURCE_MEM;
+}
+
+#ifdef CONFIG_PCI
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+ /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
+ return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = 3;
+ if (sizec)
+ *sizec = 2;
+}
+
+static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
+{
+ u64 cp, s, da;
+
+ /* Check address type match */
+ if ((addr[0] ^ range[0]) & 0x03000000)
+ return OF_BAD_ADDR;
+
+ /* Read address values, skipping high cell */
+ cp = of_read_number(range + 1, na - 1);
+ s = of_read_number(range + na + pna, ns);
+ da = of_read_number(addr + 1, na - 1);
+
+ pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
+
+ if (da < cp || da >= (cp + s))
+ return OF_BAD_ADDR;
+ return da - cp;
+}
+
+static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
+{
+ return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_pci_get_flags(const u32 *addr)
+{
+ unsigned int flags = 0;
+ u32 w = addr[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;
+}
+
+const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
+ unsigned int *flags)
+{
+ const u32 *prop;
+ unsigned int psize;
+ struct device_node *parent;
+ struct of_bus *bus;
+ int onesize, i, na, ns;
+
+ /* Get parent & match bus type */
+ parent = of_get_parent(dev);
+ if (parent == NULL)
+ return NULL;
+ bus = of_match_bus(parent);
+ if (strcmp(bus->name, "pci")) {
+ of_node_put(parent);
+ return NULL;
+ }
+ bus->count_cells(dev, &na, &ns);
+ of_node_put(parent);
+ if (!OF_CHECK_COUNTS(na, ns))
+ return NULL;
+
+ /* Get "reg" or "assigned-addresses" property */
+ prop = of_get_property(dev, bus->addresses, &psize);
+ if (prop == NULL)
+ return NULL;
+ psize /= 4;
+
+ onesize = na + ns;
+ for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
+ if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
+ if (size)
+ *size = of_read_number(prop + na, ns);
+ if (flags)
+ *flags = bus->get_flags(prop);
+ return prop;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(of_get_pci_address);
+
+int of_pci_address_to_resource(struct device_node *dev, int bar,
+ struct resource *r)
+{
+ const u32 *addrp;
+ u64 size;
+ unsigned int flags;
+
+ addrp = of_get_pci_address(dev, bar, &size, &flags);
+ if (addrp == NULL)
+ return -EINVAL;
+ return __of_address_to_resource(dev, addrp, size, flags, r);
+}
+EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
+
+static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
+{
+ return (((pin - 1) + slot) % 4) + 1;
+}
+
+int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
+{
+ struct device_node *dn, *ppnode;
+ struct pci_dev *ppdev;
+ u32 lspec;
+ u32 laddr[3];
+ u8 pin;
+ int rc;
+
+ /* Check if we have a device node, if yes, fallback to standard OF
+ * parsing
+ */
+ dn = pci_device_to_OF_node(pdev);
+ if (dn)
+ return of_irq_map_one(dn, 0, out_irq);
+
+ /* Ok, we don't, time to have fun. Let's start by building up an
+ * interrupt spec. we assume #interrupt-cells is 1, which is standard
+ * for PCI. If you do different, then don't use that routine.
+ */
+ rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
+ if (rc != 0)
+ return rc;
+ /* No pin, exit */
+ if (pin == 0)
+ return -ENODEV;
+
+ /* Now we walk up the PCI tree */
+ lspec = pin;
+ for (;;) {
+ /* Get the pci_dev of our parent */
+ ppdev = pdev->bus->self;
+
+ /* Ouch, it's a host bridge... */
+ if (ppdev == NULL) {
+#ifdef CONFIG_PPC64
+ ppnode = pci_bus_to_OF_node(pdev->bus);
+#else
+ struct pci_controller *host;
+ host = pci_bus_to_host(pdev->bus);
+ ppnode = host ? host->dn : NULL;
+#endif
+ /* No node for host bridge ? give up */
+ if (ppnode == NULL)
+ return -EINVAL;
+ } else
+ /* We found a P2P bridge, check if it has a node */
+ ppnode = pci_device_to_OF_node(ppdev);
+
+ /* Ok, we have found a parent with a device-node, hand over to
+ * the OF parsing code.
+ * We build a unit address from the linux device to be used for
+ * resolution. Note that we use the linux bus number which may
+ * not match your firmware bus numbering.
+ * Fortunately, in most cases, interrupt-map-mask doesn't include
+ * the bus number as part of the matching.
+ * You should still be careful about that though if you intend
+ * to rely on this function (you ship a firmware that doesn't
+ * create device nodes for all PCI devices).
+ */
+ if (ppnode)
+ break;
+
+ /* We can only get here if we hit a P2P bridge with no node,
+ * let's do standard swizzling and try again
+ */
+ lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
+ pdev = ppdev;
+ }
+
+ laddr[0] = (pdev->bus->number << 16)
+ | (pdev->devfn << 8);
+ laddr[1] = laddr[2] = 0;
+ return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
+}
+EXPORT_SYMBOL_GPL(of_irq_map_pci);
+#endif /* CONFIG_PCI */
+
+/*
+ * ISA bus specific translator
+ */
+
+static int of_bus_isa_match(struct device_node *np)
+{
+ return !strcmp(np->name, "isa");
+}
+
+static void of_bus_isa_count_cells(struct device_node *child,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = 2;
+ if (sizec)
+ *sizec = 1;
+}
+
+static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
+{
+ u64 cp, s, da;
+
+ /* Check address type match */
+ if ((addr[0] ^ range[0]) & 0x00000001)
+ return OF_BAD_ADDR;
+
+ /* Read address values, skipping high cell */
+ cp = of_read_number(range + 1, na - 1);
+ s = of_read_number(range + na + pna, ns);
+ da = of_read_number(addr + 1, na - 1);
+
+ pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
+
+ if (da < cp || da >= (cp + s))
+ return OF_BAD_ADDR;
+ return da - cp;
+}
+
+static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
+{
+ return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_isa_get_flags(const u32 *addr)
+{
+ unsigned int flags = 0;
+ u32 w = addr[0];
+
+ if (w & 1)
+ flags |= IORESOURCE_IO;
+ else
+ flags |= IORESOURCE_MEM;
+ return flags;
+}
+
+/*
+ * Array of bus specific translators
+ */
+static struct of_bus of_busses[] = {
+#ifdef CONFIG_PCI
+ /* PCI */
+ {
+ .name = "pci",
+ .addresses = "assigned-addresses",
+ .match = of_bus_pci_match,
+ .count_cells = of_bus_pci_count_cells,
+ .map = of_bus_pci_map,
+ .translate = of_bus_pci_translate,
+ .get_flags = of_bus_pci_get_flags,
+ },
+#endif /* CONFIG_PCI */
+ /* ISA */
+ {
+ .name = "isa",
+ .addresses = "reg",
+ .match = of_bus_isa_match,
+ .count_cells = of_bus_isa_count_cells,
+ .map = of_bus_isa_map,
+ .translate = of_bus_isa_translate,
+ .get_flags = of_bus_isa_get_flags,
+ },
+ /* Default */
+ {
+ .name = "default",
+ .addresses = "reg",
+ .match = NULL,
+ .count_cells = of_bus_default_count_cells,
+ .map = of_bus_default_map,
+ .translate = of_bus_default_translate,
+ .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 of_translate_one(struct device_node *parent, struct of_bus *bus,
+ struct of_bus *pbus, u32 *addr,
+ int na, int ns, int pna, const char *rprop)
+{
+ const u32 *ranges;
+ unsigned int rlen;
+ int rone;
+ u64 offset = OF_BAD_ADDR;
+
+ /* Normally, an absence of a "ranges" property means we are
+ * crossing a non-translatable boundary, and thus the addresses
+ * below the current not cannot be converted to CPU physical ones.
+ * Unfortunately, while this is very clear in the spec, it's not
+ * what Apple understood, and they do have things like /uni-n or
+ * /ht nodes with no "ranges" property and a lot of perfectly
+ * useable mapped devices below them. Thus we treat the absence of
+ * "ranges" as equivalent to an empty "ranges" property which means
+ * a 1:1 translation at that level. It's up to the caller not to try
+ * to translate addresses that aren't supposed to be translated in
+ * the first place. --BenH.
+ */
+ ranges = of_get_property(parent, rprop, &rlen);
+ if (ranges == NULL || rlen == 0) {
+ offset = of_read_number(addr, na);
+ memset(addr, 0, pna * 4);
+ pr_debug("OF: no ranges, 1:1 translation\n");
+ goto finish;
+ }
+
+ pr_debug("OF: walking ranges...\n");
+
+ /* Now walk through the ranges */
+ rlen /= 4;
+ rone = na + pna + ns;
+ for (; rlen >= rone; rlen -= rone, ranges += rone) {
+ offset = bus->map(addr, ranges, na, ns, pna);
+ if (offset != OF_BAD_ADDR)
+ break;
+ }
+ if (offset == OF_BAD_ADDR) {
+ pr_debug("OF: not found !\n");
+ return 1;
+ }
+ memcpy(addr, ranges + na, 4 * pna);
+
+ finish:
+ of_dump_addr("OF: parent translation for:", addr, pna);
+ pr_debug("OF: with offset: "PRu64"\n", offset);
+
+ /* Translate it into parent bus space */
+ return pbus->translate(addr, offset, pna);
+}
+
+/*
+ * Translate an address from the device-tree into a CPU physical address,
+ * this walks up the tree and applies the various bus mappings on the
+ * way.
+ *
+ * Note: We consider that crossing any level with #size-cells == 0 to mean
+ * that translation is impossible (that is we are not dealing with a value
+ * that can be mapped to a cpu physical address). This is not really specified
+ * that way, but this is traditionally the way IBM at least do things
+ */
+u64 __of_translate_address(struct device_node *dev, const u32 *in_addr,
+ const char *rprop)
+{
+ struct device_node *parent = NULL;
+ struct of_bus *bus, *pbus;
+ u32 addr[OF_MAX_ADDR_CELLS];
+ int na, ns, pna, pns;
+ u64 result = OF_BAD_ADDR;
+
+ pr_debug("OF: ** translation for device %s **\n", dev->full_name);
+
+ /* Increase refcount at current level */
+ of_node_get(dev);
+
+ /* Get parent & match bus type */
+ parent = of_get_parent(dev);
+ if (parent == NULL)
+ goto bail;
+ bus = of_match_bus(parent);
+
+ /* Cound address cells & copy address locally */
+ bus->count_cells(dev, &na, &ns);
+ if (!OF_CHECK_COUNTS(na, ns)) {
+ printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
+ dev->full_name);
+ goto bail;
+ }
+ memcpy(addr, in_addr, na * 4);
+
+ pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
+ bus->name, na, ns, parent->full_name);
+ of_dump_addr("OF: translating address:", addr, na);
+
+ /* Translate */
+ for (;;) {
+ /* Switch to parent bus */
+ of_node_put(dev);
+ dev = parent;
+ parent = of_get_parent(dev);
+
+ /* If root, we have finished */
+ if (parent == NULL) {
+ pr_debug("OF: reached root node\n");
+ result = of_read_number(addr, na);
+ break;
+ }
+
+ /* Get new parent bus and counts */
+ pbus = of_match_bus(parent);
+ pbus->count_cells(dev, &pna, &pns);
+ if (!OF_CHECK_COUNTS(pna, pns)) {
+ printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
+ dev->full_name);
+ break;
+ }
+
+ pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
+ pbus->name, pna, pns, parent->full_name);
+
+ /* Apply bus translation */
+ if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop))
+ break;
+
+ /* Complete the move up one level */
+ na = pna;
+ ns = pns;
+ bus = pbus;
+
+ of_dump_addr("OF: one level translation:", addr, na);
+ }
+ bail:
+ of_node_put(parent);
+ of_node_put(dev);
+
+ return result;
+}
+
+u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
+{
+ return __of_translate_address(dev, in_addr, "ranges");
+}
+EXPORT_SYMBOL(of_translate_address);
+
+u64 of_translate_dma_address(struct device_node *dev, const u32 *in_addr)
+{
+ return __of_translate_address(dev, in_addr, "dma-ranges");
+}
+EXPORT_SYMBOL(of_translate_dma_address);
+
+const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
+ unsigned int *flags)
+{
+ const u32 *prop;
+ unsigned int psize;
+ struct device_node *parent;
+ struct of_bus *bus;
+ int onesize, i, na, ns;
+
+ /* Get parent & match bus type */
+ parent = of_get_parent(dev);
+ if (parent == NULL)
+ return NULL;
+ bus = of_match_bus(parent);
+ bus->count_cells(dev, &na, &ns);
+ of_node_put(parent);
+ if (!OF_CHECK_COUNTS(na, ns))
+ return NULL;
+
+ /* Get "reg" or "assigned-addresses" property */
+ prop = of_get_property(dev, bus->addresses, &psize);
+ if (prop == NULL)
+ return NULL;
+ psize /= 4;
+
+ onesize = na + ns;
+ for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
+ if (i == index) {
+ if (size)
+ *size = of_read_number(prop + na, ns);
+ if (flags)
+ *flags = bus->get_flags(prop);
+ return prop;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(of_get_address);
+
+static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
+ u64 size, unsigned int flags,
+ struct resource *r)
+{
+ u64 taddr;
+
+ if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
+ return -EINVAL;
+ taddr = of_translate_address(dev, addrp);
+ if (taddr == OF_BAD_ADDR)
+ return -EINVAL;
+ memset(r, 0, sizeof(struct resource));
+ if (flags & IORESOURCE_IO) {
+ unsigned long port;
+#ifdef CONFIG_PCI
+ port = pci_address_to_pio(taddr);
+#else
+ port = -1;
+#endif
+ if (port == (unsigned long)-1)
+ return -EINVAL;
+ r->start = port;
+ r->end = port + size - 1;
+ } else {
+ r->start = taddr;
+ r->end = taddr + size - 1;
+ }
+ r->flags = flags;
+ r->name = dev->name;
+ return 0;
+}
+
+int of_address_to_resource(struct device_node *dev, int index,
+ struct resource *r)
+{
+ const u32 *addrp;
+ u64 size;
+ unsigned int flags;
+
+ addrp = of_get_address(dev, index, &size, &flags);
+ if (addrp == NULL)
+ return -EINVAL;
+ return __of_address_to_resource(dev, addrp, size, flags, r);
+}
+EXPORT_SYMBOL_GPL(of_address_to_resource);
+
+void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
+ unsigned long *busno, unsigned long *phys, unsigned long *size)
+{
+ const u32 *dma_window;
+ u32 cells;
+ const unsigned char *prop;
+
+ dma_window = dma_window_prop;
+
+ /* busno is always one cell */
+ *busno = *(dma_window++);
+
+ prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
+ if (!prop)
+ prop = of_get_property(dn, "#address-cells", NULL);
+
+ cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
+ *phys = of_read_number(dma_window, cells);
+
+ dma_window += cells;
+
+ prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
+ cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
+ *size = of_read_number(dma_window, cells);
+}
+
+/*
+ * Interrupt remapper
+ */
+
+static unsigned int of_irq_workarounds;
+static struct device_node *of_irq_dflt_pic;
+
+static struct device_node *of_irq_find_parent(struct device_node *child)
+{
+ struct device_node *p;
+ const phandle *parp;
+
+ if (!of_node_get(child))
+ return NULL;
+
+ do {
+ parp = of_get_property(child, "interrupt-parent", NULL);
+ if (parp == NULL)
+ p = of_get_parent(child);
+ else {
+ if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
+ p = of_node_get(of_irq_dflt_pic);
+ else
+ p = of_find_node_by_phandle(*parp);
+ }
+ of_node_put(child);
+ child = p;
+ } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
+
+ return p;
+}
+
+/* This doesn't need to be called if you don't have any special workaround
+ * flags to pass
+ */
+void of_irq_map_init(unsigned int flags)
+{
+ of_irq_workarounds = flags;
+
+ /* OldWorld, don't bother looking at other things */
+ if (flags & OF_IMAP_OLDWORLD_MAC)
+ return;
+
+ /* If we don't have phandles, let's try to locate a default interrupt
+ * controller (happens when booting with BootX). We do a first match
+ * here, hopefully, that only ever happens on machines with one
+ * controller.
+ */
+ if (flags & OF_IMAP_NO_PHANDLE) {
+ struct device_node *np;
+
+ for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
+ if (of_get_property(np, "interrupt-controller", NULL)
+ == NULL)
+ continue;
+ /* Skip /chosen/interrupt-controller */
+ if (strcmp(np->name, "chosen") == 0)
+ continue;
+ /* It seems like at least one person on this planet wants
+ * to use BootX on a machine with an AppleKiwi controller
+ * which happens to pretend to be an interrupt
+ * controller too.
+ */
+ if (strcmp(np->name, "AppleKiwi") == 0)
+ continue;
+ /* I think we found one ! */
+ of_irq_dflt_pic = np;
+ break;
+ }
+ }
+
+}
+
+int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
+ const u32 *addr, struct of_irq *out_irq)
+{
+ struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
+ const u32 *tmp, *imap, *imask;
+ u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
+ int imaplen, match, i;
+
+ pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
+ "ointsize=%d\n",
+ parent->full_name, intspec[0], intspec[1], ointsize);
+
+ ipar = of_node_get(parent);
+
+ /* First get the #interrupt-cells property of the current cursor
+ * that tells us how to interpret the passed-in intspec. If there
+ * is none, we are nice and just walk up the tree
+ */
+ do {
+ tmp = of_get_property(ipar, "#interrupt-cells", NULL);
+ if (tmp != NULL) {
+ intsize = *tmp;
+ break;
+ }
+ tnode = ipar;
+ ipar = of_irq_find_parent(ipar);
+ of_node_put(tnode);
+ } while (ipar);
+ if (ipar == NULL) {
+ pr_debug(" -> no parent found !\n");
+ goto fail;
+ }
+
+ pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
+ ipar->full_name, intsize);
+
+ if (ointsize != intsize)
+ return -EINVAL;
+
+ /* Look for this #address-cells. We have to implement the old linux
+ * trick of looking for the parent here as some device-trees rely on it
+ */
+ old = of_node_get(ipar);
+ do {
+ tmp = of_get_property(old, "#address-cells", NULL);
+ tnode = of_get_parent(old);
+ of_node_put(old);
+ old = tnode;
+ } while (old && tmp == NULL);
+ of_node_put(old);
+ old = NULL;
+ addrsize = (tmp == NULL) ? 2 : *tmp;
+
+ pr_debug(" -> addrsize=%d\n", addrsize);
+
+ /* Now start the actual "proper" walk of the interrupt tree */
+ while (ipar != NULL) {
+ /* Now check if cursor is an interrupt-controller and if it is
+ * then we are done
+ */
+ if (of_get_property(ipar, "interrupt-controller", NULL) !=
+ NULL) {
+ pr_debug(" -> got it !\n");
+ memcpy(out_irq->specifier,
+ intspec, intsize * sizeof(u32));
+ out_irq->size = intsize;
+ out_irq->controller = ipar;
+ of_node_put(old);
+ return 0;
+ }
+
+ /* Now look for an interrupt-map */
+ imap = of_get_property(ipar, "interrupt-map", &imaplen);
+ /* No interrupt map, check for an interrupt parent */
+ if (imap == NULL) {
+ pr_debug(" -> no map, getting parent\n");
+ newpar = of_irq_find_parent(ipar);
+ goto skiplevel;
+ }
+ imaplen /= sizeof(u32);
+
+ /* Look for a mask */
+ imask = of_get_property(ipar, "interrupt-map-mask", NULL);
+
+ /* If we were passed no "reg" property and we attempt to parse
+ * an interrupt-map, then #address-cells must be 0.
+ * Fail if it's not.
+ */
+ if (addr == NULL && addrsize != 0) {
+ pr_debug(" -> no reg passed in when needed !\n");
+ goto fail;
+ }
+
+ /* Parse interrupt-map */
+ match = 0;
+ while (imaplen > (addrsize + intsize + 1) && !match) {
+ /* Compare specifiers */
+ match = 1;
+ for (i = 0; i < addrsize && match; ++i) {
+ u32 mask = imask ? imask[i] : 0xffffffffu;
+ match = ((addr[i] ^ imap[i]) & mask) == 0;
+ }
+ for (; i < (addrsize + intsize) && match; ++i) {
+ u32 mask = imask ? imask[i] : 0xffffffffu;
+ match =
+ ((intspec[i-addrsize] ^ imap[i]) & mask) == 0;
+ }
+ imap += addrsize + intsize;
+ imaplen -= addrsize + intsize;
+
+ pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
+
+ /* Get the interrupt parent */
+ if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
+ newpar = of_node_get(of_irq_dflt_pic);
+ else
+ newpar = of_find_node_by_phandle((phandle)*imap);
+ imap++;
+ --imaplen;
+
+ /* Check if not found */
+ if (newpar == NULL) {
+ pr_debug(" -> imap parent not found !\n");
+ goto fail;
+ }
+
+ /* Get #interrupt-cells and #address-cells of new
+ * parent
+ */
+ tmp = of_get_property(newpar, "#interrupt-cells", NULL);
+ if (tmp == NULL) {
+ pr_debug(" -> parent lacks #interrupt-cells !\n");
+ goto fail;
+ }
+ newintsize = *tmp;
+ tmp = of_get_property(newpar, "#address-cells", NULL);
+ newaddrsize = (tmp == NULL) ? 0 : *tmp;
+
+ pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
+ newintsize, newaddrsize);
+
+ /* Check for malformed properties */
+ if (imaplen < (newaddrsize + newintsize))
+ goto fail;
+
+ imap += newaddrsize + newintsize;
+ imaplen -= newaddrsize + newintsize;
+
+ pr_debug(" -> imaplen=%d\n", imaplen);
+ }
+ if (!match)
+ goto fail;
+
+ of_node_put(old);
+ old = of_node_get(newpar);
+ addrsize = newaddrsize;
+ intsize = newintsize;
+ intspec = imap - intsize;
+ addr = intspec - addrsize;
+
+ skiplevel:
+ /* Iterate again with new parent */
+ pr_debug(" -> new parent: %s\n", newpar ? newpar->full_name : "<>");
+ of_node_put(ipar);
+ ipar = newpar;
+ newpar = NULL;
+ }
+fail:
+ of_node_put(ipar);
+ of_node_put(old);
+ of_node_put(newpar);
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(of_irq_map_raw);
+
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+static int of_irq_map_oldworld(struct device_node *device, int index,
+ struct of_irq *out_irq)
+{
+ const u32 *ints = NULL;
+ int intlen;
+
+ /*
+ * Old machines just have a list of interrupt numbers
+ * and no interrupt-controller nodes. We also have dodgy
+ * cases where the APPL,interrupts property is completely
+ * missing behind pci-pci bridges and we have to get it
+ * from the parent (the bridge itself, as apple just wired
+ * everything together on these)
+ */
+ while (device) {
+ ints = of_get_property(device, "AAPL,interrupts", &intlen);
+ if (ints != NULL)
+ break;
+ device = device->parent;
+ if (device && strcmp(device->type, "pci") != 0)
+ break;
+ }
+ if (ints == NULL)
+ return -EINVAL;
+ intlen /= sizeof(u32);
+
+ if (index >= intlen)
+ return -EINVAL;
+
+ out_irq->controller = NULL;
+ out_irq->specifier[0] = ints[index];
+ out_irq->size = 1;
+
+ return 0;
+}
+#else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */
+static int of_irq_map_oldworld(struct device_node *device, int index,
+ struct of_irq *out_irq)
+{
+ return -EINVAL;
+}
+#endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */
+
+int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq)
+{
+ struct device_node *p;
+ const u32 *intspec, *tmp, *addr;
+ u32 intsize, intlen;
+ int res;
+
+ pr_debug("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index);
+
+ /* OldWorld mac stuff is "special", handle out of line */
+ if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
+ return of_irq_map_oldworld(device, index, out_irq);
+
+ /* Get the interrupts property */
+ intspec = of_get_property(device, "interrupts", &intlen);
+ if (intspec == NULL)
+ return -EINVAL;
+ intlen /= sizeof(u32);
+
+ /* Get the reg property (if any) */
+ addr = of_get_property(device, "reg", NULL);
+
+ /* Look for the interrupt parent. */
+ p = of_irq_find_parent(device);
+ if (p == NULL)
+ return -EINVAL;
+
+ /* Get size of interrupt specifier */
+ tmp = of_get_property(p, "#interrupt-cells", NULL);
+ if (tmp == NULL) {
+ of_node_put(p);
+ return -EINVAL;
+ }
+ intsize = *tmp;
+
+ pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
+
+ /* Check index */
+ if ((index + 1) * intsize > intlen)
+ return -EINVAL;
+
+ /* Get new specifier and map it */
+ res = of_irq_map_raw(p, intspec + index * intsize, intsize,
+ addr, out_irq);
+ of_node_put(p);
+ return res;
+}
+EXPORT_SYMBOL_GPL(of_irq_map_one);
+
+/**
+ * Search the device tree for the best MAC address to use. 'mac-address' is
+ * checked first, because that is supposed to contain to "most recent" MAC
+ * address. If that isn't set, then 'local-mac-address' is checked next,
+ * because that is the default address. If that isn't set, then the obsolete
+ * 'address' is checked, just in case we're using an old device tree.
+ *
+ * Note that the 'address' property is supposed to contain a virtual address of
+ * the register set, but some DTS files have redefined that property to be the
+ * MAC address.
+ *
+ * All-zero MAC addresses are rejected, because those could be properties that
+ * exist in the device tree, but were not set by U-Boot. For example, the
+ * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
+ * addresses. Some older U-Boots only initialized 'local-mac-address'. In
+ * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
+ * but is all zeros.
+*/
+const void *of_get_mac_address(struct device_node *np)
+{
+ struct property *pp;
+
+ pp = of_find_property(np, "mac-address", NULL);
+ if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
+ return pp->value;
+
+ pp = of_find_property(np, "local-mac-address", NULL);
+ if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
+ return pp->value;
+
+ pp = of_find_property(np, "address", NULL);
+ if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
+ return pp->value;
+
+ return NULL;
+}
+EXPORT_SYMBOL(of_get_mac_address);
+
+int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
+{
+ int irq = irq_of_parse_and_map(dev, index);
+
+ /* Only dereference the resource if both the
+ * resource and the irq are valid. */
+ if (r && irq != NO_IRQ) {
+ r->start = r->end = irq;
+ r->flags = IORESOURCE_IRQ;
+ }
+
+ return irq;
+}
+EXPORT_SYMBOL_GPL(of_irq_to_resource);
+
+void __iomem *of_iomap(struct device_node *np, int index)
+{
+ struct resource res;
+
+ if (of_address_to_resource(np, index, &res))
+ return NULL;
+
+ return ioremap(res.start, 1 + res.end - res.start);
+}
+EXPORT_SYMBOL(of_iomap);
--
1.5.4.GIT
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