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>
This commit is contained in:
Grant Likely
parent
1f5bef30cf
commit
dbbdee9473
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@ -52,10 +52,6 @@ extern void pci_create_OF_bus_map(void);
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* OF address retreival & translation
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* OF address retreival & translation
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*/
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*/
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/* Translate an OF address block into a CPU physical address
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*/
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extern u64 of_translate_address(struct device_node *np, const u32 *addr);
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/* Extract an address from a device, returns the region size and
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/* Extract an address from a device, returns the region size and
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* the address space flags too. The PCI version uses a BAR number
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* the address space flags too. The PCI version uses a BAR number
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* instead of an absolute index
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* instead of an absolute index
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@ -10,213 +10,7 @@
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#include <asm/prom.h>
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#include <asm/prom.h>
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#include <asm/pci-bridge.h>
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#include <asm/pci-bridge.h>
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#define PRu64 "%llx"
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/* Max address size we deal with */
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#define OF_MAX_ADDR_CELLS 4
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#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
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(ns) > 0)
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static struct of_bus *of_match_bus(struct device_node *np);
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/* Debug utility */
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#ifdef DEBUG
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static void of_dump_addr(const char *s, const u32 *addr, int na)
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{
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printk(KERN_INFO "%s", s);
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while (na--)
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printk(KERN_INFO " %08x", *(addr++));
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printk(KERN_INFO "\n");
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}
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#else
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static void of_dump_addr(const char *s, const u32 *addr, int na) { }
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#endif
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/* Callbacks for bus specific translators */
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struct of_bus {
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const char *name;
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const char *addresses;
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int (*match)(struct device_node *parent);
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void (*count_cells)(struct device_node *child,
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int *addrc, int *sizec);
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u64 (*map)(u32 *addr, const u32 *range,
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int na, int ns, int pna);
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int (*translate)(u32 *addr, u64 offset, int na);
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unsigned int (*get_flags)(const u32 *addr);
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};
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/*
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* Default translator (generic bus)
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*/
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static void of_bus_default_count_cells(struct device_node *dev,
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int *addrc, int *sizec)
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{
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if (addrc)
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*addrc = of_n_addr_cells(dev);
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if (sizec)
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*sizec = of_n_size_cells(dev);
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}
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static u64 of_bus_default_map(u32 *addr, const u32 *range,
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int na, int ns, int pna)
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{
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u64 cp, s, da;
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cp = of_read_number(range, na);
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s = of_read_number(range + na + pna, ns);
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da = of_read_number(addr, na);
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pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
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cp, s, da);
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if (da < cp || da >= (cp + s))
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return OF_BAD_ADDR;
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return da - cp;
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}
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static int of_bus_default_translate(u32 *addr, u64 offset, int na)
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{
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u64 a = of_read_number(addr, na);
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memset(addr, 0, na * 4);
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a += offset;
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if (na > 1)
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addr[na - 2] = a >> 32;
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addr[na - 1] = a & 0xffffffffu;
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return 0;
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}
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static unsigned int of_bus_default_get_flags(const u32 *addr)
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{
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return IORESOURCE_MEM;
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}
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#ifdef CONFIG_PCI
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#ifdef CONFIG_PCI
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/*
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* PCI bus specific translator
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*/
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static int of_bus_pci_match(struct device_node *np)
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{
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/* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
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return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
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}
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static void of_bus_pci_count_cells(struct device_node *np,
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int *addrc, int *sizec)
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{
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if (addrc)
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*addrc = 3;
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if (sizec)
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*sizec = 2;
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}
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static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
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{
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u64 cp, s, da;
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/* Check address type match */
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if ((addr[0] ^ range[0]) & 0x03000000)
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return OF_BAD_ADDR;
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/* Read address values, skipping high cell */
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cp = of_read_number(range + 1, na - 1);
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s = of_read_number(range + na + pna, ns);
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da = of_read_number(addr + 1, na - 1);
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pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
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if (da < cp || da >= (cp + s))
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return OF_BAD_ADDR;
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return da - cp;
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}
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static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
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{
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return of_bus_default_translate(addr + 1, offset, na - 1);
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}
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static unsigned int of_bus_pci_get_flags(const u32 *addr)
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{
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unsigned int flags = 0;
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u32 w = addr[0];
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switch ((w >> 24) & 0x03) {
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case 0x01:
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flags |= IORESOURCE_IO;
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break;
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case 0x02: /* 32 bits */
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case 0x03: /* 64 bits */
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flags |= IORESOURCE_MEM;
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break;
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}
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if (w & 0x40000000)
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flags |= IORESOURCE_PREFETCH;
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return flags;
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}
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const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
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unsigned int *flags)
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{
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const u32 *prop;
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unsigned int psize;
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struct device_node *parent;
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struct of_bus *bus;
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int onesize, i, na, ns;
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/* Get parent & match bus type */
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parent = of_get_parent(dev);
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if (parent == NULL)
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return NULL;
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bus = of_match_bus(parent);
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if (strcmp(bus->name, "pci")) {
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of_node_put(parent);
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return NULL;
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}
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bus->count_cells(dev, &na, &ns);
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of_node_put(parent);
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if (!OF_CHECK_COUNTS(na, ns))
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return NULL;
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/* Get "reg" or "assigned-addresses" property */
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prop = of_get_property(dev, bus->addresses, &psize);
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if (prop == NULL)
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return NULL;
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psize /= 4;
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onesize = na + ns;
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for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
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if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
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if (size)
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*size = of_read_number(prop + na, ns);
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if (flags)
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*flags = bus->get_flags(prop);
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return prop;
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}
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return NULL;
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}
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EXPORT_SYMBOL(of_get_pci_address);
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int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r)
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{
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const u32 *addrp;
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u64 size;
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unsigned int flags;
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addrp = of_get_pci_address(dev, bar, &size, &flags);
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if (addrp == NULL)
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return -EINVAL;
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return __of_address_to_resource(dev, addrp, size, flags, r);
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}
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EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
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static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
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{
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return (((pin - 1) + slot) % 4) + 1;
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}
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int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
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int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
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{
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{
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struct device_node *dn, *ppnode;
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struct device_node *dn, *ppnode;
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@ -291,289 +85,6 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
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EXPORT_SYMBOL_GPL(of_irq_map_pci);
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EXPORT_SYMBOL_GPL(of_irq_map_pci);
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#endif /* CONFIG_PCI */
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#endif /* CONFIG_PCI */
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/*
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* ISA bus specific translator
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*/
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static int of_bus_isa_match(struct device_node *np)
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{
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return !strcmp(np->name, "isa");
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}
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static void of_bus_isa_count_cells(struct device_node *child,
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int *addrc, int *sizec)
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{
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if (addrc)
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*addrc = 2;
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if (sizec)
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*sizec = 1;
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}
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static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
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{
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u64 cp, s, da;
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/* Check address type match */
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if ((addr[0] ^ range[0]) & 0x00000001)
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return OF_BAD_ADDR;
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/* Read address values, skipping high cell */
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cp = of_read_number(range + 1, na - 1);
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s = of_read_number(range + na + pna, ns);
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da = of_read_number(addr + 1, na - 1);
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pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
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if (da < cp || da >= (cp + s))
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return OF_BAD_ADDR;
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return da - cp;
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}
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static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
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{
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return of_bus_default_translate(addr + 1, offset, na - 1);
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}
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static unsigned int of_bus_isa_get_flags(const u32 *addr)
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{
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unsigned int flags = 0;
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u32 w = addr[0];
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if (w & 1)
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flags |= IORESOURCE_IO;
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else
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flags |= IORESOURCE_MEM;
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return flags;
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}
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/*
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* Array of bus specific translators
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*/
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static struct of_bus of_busses[] = {
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#ifdef CONFIG_PCI
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/* PCI */
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{
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.name = "pci",
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.addresses = "assigned-addresses",
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.match = of_bus_pci_match,
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.count_cells = of_bus_pci_count_cells,
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.map = of_bus_pci_map,
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.translate = of_bus_pci_translate,
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.get_flags = of_bus_pci_get_flags,
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},
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#endif /* CONFIG_PCI */
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/* ISA */
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{
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.name = "isa",
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.addresses = "reg",
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.match = of_bus_isa_match,
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.count_cells = of_bus_isa_count_cells,
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.map = of_bus_isa_map,
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.translate = of_bus_isa_translate,
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.get_flags = of_bus_isa_get_flags,
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},
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/* Default */
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{
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.name = "default",
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.addresses = "reg",
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.match = NULL,
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.count_cells = of_bus_default_count_cells,
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.map = of_bus_default_map,
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.translate = of_bus_default_translate,
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.get_flags = of_bus_default_get_flags,
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},
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};
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static struct of_bus *of_match_bus(struct device_node *np)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(of_busses); i++)
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if (!of_busses[i].match || of_busses[i].match(np))
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return &of_busses[i];
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BUG();
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return NULL;
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}
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static int of_translate_one(struct device_node *parent, struct of_bus *bus,
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struct of_bus *pbus, u32 *addr,
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int na, int ns, int pna)
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{
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const u32 *ranges;
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unsigned int rlen;
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int rone;
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u64 offset = OF_BAD_ADDR;
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/* Normally, an absence of a "ranges" property means we are
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* crossing a non-translatable boundary, and thus the addresses
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* below the current not cannot be converted to CPU physical ones.
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* Unfortunately, while this is very clear in the spec, it's not
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* what Apple understood, and they do have things like /uni-n or
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* /ht nodes with no "ranges" property and a lot of perfectly
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* useable mapped devices below them. Thus we treat the absence of
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* "ranges" as equivalent to an empty "ranges" property which means
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* a 1:1 translation at that level. It's up to the caller not to try
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* to translate addresses that aren't supposed to be translated in
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* the first place. --BenH.
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*/
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ranges = of_get_property(parent, "ranges", (int *) &rlen);
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if (ranges == NULL || rlen == 0) {
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offset = of_read_number(addr, na);
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memset(addr, 0, pna * 4);
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pr_debug("OF: no ranges, 1:1 translation\n");
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goto finish;
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}
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pr_debug("OF: walking ranges...\n");
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/* Now walk through the ranges */
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rlen /= 4;
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rone = na + pna + ns;
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for (; rlen >= rone; rlen -= rone, ranges += rone) {
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offset = bus->map(addr, ranges, na, ns, pna);
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if (offset != OF_BAD_ADDR)
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break;
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}
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if (offset == OF_BAD_ADDR) {
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pr_debug("OF: not found !\n");
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return 1;
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|
||||||
}
|
|
||||||
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)
|
|
||||||
{
|
|
||||||
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))
|
|
||||||
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;
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL(of_translate_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, (int *) &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,
|
void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
|
||||||
unsigned long *busno, unsigned long *phys, unsigned long *size)
|
unsigned long *busno, unsigned long *phys, unsigned long *size)
|
||||||
{
|
{
|
||||||
|
|
|
||||||
|
|
@ -45,10 +45,6 @@ extern void pci_create_OF_bus_map(void);
|
||||||
* OF address retreival & translation
|
* OF address retreival & translation
|
||||||
*/
|
*/
|
||||||
|
|
||||||
/* Translate an OF address block into a CPU physical address
|
|
||||||
*/
|
|
||||||
extern u64 of_translate_address(struct device_node *np, const u32 *addr);
|
|
||||||
|
|
||||||
/* Translate a DMA address from device space to CPU space */
|
/* Translate a DMA address from device space to CPU space */
|
||||||
extern u64 of_translate_dma_address(struct device_node *dev,
|
extern u64 of_translate_dma_address(struct device_node *dev,
|
||||||
const u32 *in_addr);
|
const u32 *in_addr);
|
||||||
|
|
|
||||||
|
|
@ -10,225 +10,7 @@
|
||||||
#include <asm/prom.h>
|
#include <asm/prom.h>
|
||||||
#include <asm/pci-bridge.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
|
#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)
|
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
|
||||||
{
|
{
|
||||||
struct device_node *dn, *ppnode;
|
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);
|
EXPORT_SYMBOL_GPL(of_irq_map_pci);
|
||||||
#endif /* CONFIG_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,
|
void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
|
||||||
unsigned long *busno, unsigned long *phys, unsigned long *size)
|
unsigned long *busno, unsigned long *phys, unsigned long *size)
|
||||||
{
|
{
|
||||||
|
|
|
||||||
|
|
@ -1,11 +1,522 @@
|
||||||
|
|
||||||
#include <linux/io.h>
|
#include <linux/io.h>
|
||||||
#include <linux/ioport.h>
|
#include <linux/ioport.h>
|
||||||
|
#include <linux/module.h>
|
||||||
#include <linux/of_address.h>
|
#include <linux/of_address.h>
|
||||||
|
#include <linux/pci_regs.h>
|
||||||
|
#include <linux/string.h>
|
||||||
|
|
||||||
int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
|
/* Max address size we deal with */
|
||||||
u64 size, unsigned int flags,
|
#define OF_MAX_ADDR_CELLS 4
|
||||||
struct resource *r)
|
#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_DEBUG "%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);
|
||||||
|
|
||||||
|
pr_debug("OF: default map, cp=%llx, s=%llx, da=%llx\n",
|
||||||
|
(unsigned long long)cp, (unsigned long long)s,
|
||||||
|
(unsigned long long)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);
|
||||||
|
|
||||||
|
pr_debug("OF: PCI map, cp=%llx, s=%llx, da=%llx\n",
|
||||||
|
(unsigned long long)cp, (unsigned long long)s,
|
||||||
|
(unsigned long long)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);
|
||||||
|
#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=%llx, s=%llx, da=%llx\n",
|
||||||
|
(unsigned long long)cp, (unsigned long long)s,
|
||||||
|
(unsigned long long)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: %llx\n", (unsigned long long)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;
|
u64 taddr;
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -3,9 +3,7 @@
|
||||||
#include <linux/ioport.h>
|
#include <linux/ioport.h>
|
||||||
#include <linux/of.h>
|
#include <linux/of.h>
|
||||||
|
|
||||||
extern int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
|
extern u64 of_translate_address(struct device_node *np, const u32 *addr);
|
||||||
u64 size, unsigned int flags,
|
|
||||||
struct resource *r);
|
|
||||||
extern int of_address_to_resource(struct device_node *dev, int index,
|
extern int of_address_to_resource(struct device_node *dev, int index,
|
||||||
struct resource *r);
|
struct resource *r);
|
||||||
extern void __iomem *of_iomap(struct device_node *device, int index);
|
extern void __iomem *of_iomap(struct device_node *device, int index);
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue