summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel/prom_parse.c
diff options
context:
space:
mode:
authorGrant Likely <grant.likely@secretlab.ca>2010-06-08 07:48:10 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-07-05 16:14:26 -0600
commitdbbdee94734bf6f1db7af42008a53655e77cab8f (patch)
treec0f571b0ab57a6483bc07e21e3b888e253d699ea /arch/powerpc/kernel/prom_parse.c
parent1f5bef30cf6c66f097ea5dfc580a41924df888d1 (diff)
downloadlinux-dbbdee94734bf6f1db7af42008a53655e77cab8f.tar.gz
linux-dbbdee94734bf6f1db7af42008a53655e77cab8f.tar.bz2
linux-dbbdee94734bf6f1db7af42008a53655e77cab8f.zip
of/address: Merge all of the bus translation code
Microblaze and PowerPC share a large chunk of code for translating OF device tree data into usable addresses. Differences between the two consist of cosmetic differences, and the addition of dma-ranges support code to powerpc but not microblaze. This patch moves the powerpc version into common code and applies many of the cosmetic (non-functional) changes from the microblaze version. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Michal Simek <monstr@monstr.eu> CC: Wolfram Sang <w.sang@pengutronix.de> CC: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/powerpc/kernel/prom_parse.c')
-rw-r--r--arch/powerpc/kernel/prom_parse.c515
1 files changed, 0 insertions, 515 deletions
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 1dac535de78f..88334af038e5 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -10,225 +10,7 @@
#include <asm/prom.h>
#include <asm/pci-bridge.h>
-#ifdef DEBUG
-#define DBG(fmt...) do { printk(fmt); } while(0)
-#else
-#define DBG(fmt...) do { } while(0)
-#endif
-
-#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);
-
-/* Debug utility */
-#ifdef DEBUG
-static void of_dump_addr(const char *s, const u32 *addr, int na)
-{
- printk("%s", s);
- while(na--)
- printk(" %08x", *(addr++));
- printk("\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);
-
- DBG("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 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;
-}
-
-static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
-{
- u64 cp, s, da;
- unsigned int af, rf;
-
- af = of_bus_pci_get_flags(addr);
- rf = of_bus_pci_get_flags(range);
-
- /* Check address type match */
- if ((af ^ rf) & (IORESOURCE_MEM | IORESOURCE_IO))
- 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);
-
- DBG("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);
-}
-
-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);
-
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
{
struct device_node *dn, *ppnode;
@@ -310,303 +92,6 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *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);
-
- DBG("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);
- DBG("OF: no ranges, 1:1 translation\n");
- goto finish;
- }
-
- DBG("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) {
- DBG("OF: not found !\n");
- return 1;
- }
- memcpy(addr, ranges + na, 4 * pna);
-
- finish:
- of_dump_addr("OF: parent translation for:", addr, pna);
- DBG("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;
-
- DBG("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);
-
- DBG("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) {
- DBG("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;
- }
-
- DBG("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);
-
void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
unsigned long *busno, unsigned long *phys, unsigned long *size)
{