[PATCH] powerpc: Update OF address parsers

This updates the OF address parsers to return the IO flags
indicating the type of address obtained. It also adds a PCI
call for converting physical addresses that hit IO space into
into IO tokens, and add routines that return the translated
addresses into struct resource

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

10 files changed, 251 insertions, 36 deletions

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 83023bb59ad9..d179ec502292 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -146,6 +146,7 @@ static int __init add_legacy_pci_port(struct device_node *np,
 {
         phys_addr_t addr, base;
         u32 *addrp;
+        unsigned int flags;
         int iotype, index = -1, lindex = 0;
 
         /* We only support ports that have a clock frequency properly
@@ -159,12 +160,12 @@ static int __init add_legacy_pci_port(struct device_node *np,
                 return -1;
 
         /* Get the PCI address. Assume BAR 0 */
-        addrp = of_get_pci_address(pci_dev, 0, NULL);
+        addrp = of_get_pci_address(pci_dev, 0, NULL, &flags);
         if (addrp == NULL)
                 return -1;
 
         /* We only support BAR 0 for now */
-        iotype = (addrp[0] & 0x02000000) ? UPIO_MEM : UPIO_PORT;
+        iotype = (flags & IORESOURCE_MEM) ? UPIO_MEM : UPIO_PORT;
         addr = of_translate_address(pci_dev, addrp);
 
         /* Set the IO base to the same as the translated address for MMIO,
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 5f241fcd88e8..0988222741f0 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -1181,6 +1181,20 @@ void phbs_remap_io(void)
                 remap_bus_range(hose->bus);
 }
 
+unsigned int pci_address_to_pio(phys_addr_t address)
+{
+        struct pci_controller *hose, *tmp;
+
+        list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+                if (address >= hose->io_base_phys &&
+                    address < (hose->io_base_phys + hose->pci_io_size))
+                        return (unsigned int)hose->io_base_virt +
+                                (address - hose->io_base_phys);
+        }
+        return (unsigned int)-1;
+}
+EXPORT_SYMBOL_GPL(pci_address_to_pio);
+
 static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
 {
         struct pci_controller *hose = pci_bus_to_host(dev->bus);
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 23c85af53d47..5b764277f470 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -4,7 +4,9 @@
 #include <linux/string.h>
 #include <linux/pci_regs.h>
 #include <linux/module.h>
+#include <linux/ioport.h>
 #include <asm/prom.h>
+#include <asm/pci-bridge.h>
 
 #ifdef DEBUG
 #define DBG(fmt...) do { printk(fmt); } while(0)
@@ -54,6 +56,7 @@ struct of_bus {
                                        int *addrc, int *sizec);
         u64             (*map)(u32 *addr, u32 *range, int na, int ns, int pna);
         int             (*translate)(u32 *addr, u64 offset, int na);
+        unsigned int    (*get_flags)(u32 *addr);
 };
 
 
@@ -61,8 +64,8 @@ struct of_bus {
  * Default translator (generic bus)
  */
 
-static void of_default_count_cells(struct device_node *dev,
-                                   int *addrc, int *sizec)
+static void of_bus_default_count_cells(struct device_node *dev,
+                                       int *addrc, int *sizec)
 {
         if (addrc)
                 *addrc = prom_n_addr_cells(dev);
@@ -70,7 +73,7 @@ static void of_default_count_cells(struct device_node *dev,
                 *sizec = prom_n_size_cells(dev);
 }
 
-static u64 of_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
+static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
 {
         u64 cp, s, da;
 
@@ -86,7 +89,7 @@ static u64 of_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
         return da - cp;
 }
 
-static int of_default_translate(u32 *addr, u64 offset, int na)
+static int of_bus_default_translate(u32 *addr, u64 offset, int na)
 {
         u64 a = of_read_addr(addr, na);
         memset(addr, 0, na * 4);
@@ -98,6 +101,11 @@ static int of_default_translate(u32 *addr, u64 offset, int na)
         return 0;
 }
 
+static unsigned int of_bus_default_get_flags(u32 *addr)
+{
+        return IORESOURCE_MEM;
+}
+
 
 /*
  * PCI bus specific translator
@@ -139,7 +147,24 @@ static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna)
 
 static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
 {
-        return of_default_translate(addr + 1, offset, na - 1);
+        return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_pci_get_flags(u32 *addr)
+{
+        unsigned int flags = 0;
+        u32 w = addr[0];
+
+        switch((w >> 24) & 0x03) {
+        case 0x01:
+                flags |= IORESOURCE_IO;
+        case 0x02: /* 32 bits */
+        case 0x03: /* 64 bits */
+                flags |= IORESOURCE_MEM;
+        }
+        if (w & 0x40000000)
+                flags |= IORESOURCE_PREFETCH;
+        return flags;
 }
 
 /*
@@ -182,9 +207,22 @@ static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna)
 
 static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
 {
-        return of_default_translate(addr + 1, offset, na - 1);
+        return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_isa_get_flags(u32 *addr)
+{
+        unsigned int flags = 0;
+        u32 w = addr[0];
+
+        if (w & 1)
+                flags |= IORESOURCE_IO;
+        else
+                flags |= IORESOURCE_MEM;