Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9dd855a729abb4670522d5eae6854db48d624498
Commit:     9dd855a729abb4670522d5eae6854db48d624498
Parent:     6bf05fd776e38a0a9c17e17c2345b59b1b9aa2cb
Author:     Christian Krafft <[EMAIL PROTECTED]>
AuthorDate: Mon Apr 23 21:35:46 2007 +0200
Committer:  Arnd Bergmann <[EMAIL PROTECTED]>
CommitDate: Mon Apr 23 21:44:40 2007 +0200

    [POWERPC] cell: add support for proper device-tree
    
    This patch adds support for a proper device-tree.
    A porper device-tree on cell contains be nodes
    for each CBE containg nodes for SPEs and all the
    other special devices on it.
    Ofcourse oldschool devicetree is still supported.
    
    Signed-off-by: Christian Krafft <[EMAIL PROTECTED]>
    Signed-off-by: Arnd Bergmann <[EMAIL PROTECTED]>
---
 arch/powerpc/platforms/cell/cbe_regs.c |  118 ++++++++++++++++++++++++--------
 1 files changed, 88 insertions(+), 30 deletions(-)

diff --git a/arch/powerpc/platforms/cell/cbe_regs.c 
b/arch/powerpc/platforms/cell/cbe_regs.c
index dca39c0..12c9674 100644
--- a/arch/powerpc/platforms/cell/cbe_regs.c
+++ b/arch/powerpc/platforms/cell/cbe_regs.c
@@ -14,6 +14,8 @@
 #include <asm/pgtable.h>
 #include <asm/prom.h>
 #include <asm/ptrace.h>
+#include <asm/of_device.h>
+#include <asm/of_platform.h>
 
 #include "cbe_regs.h"
 
@@ -27,6 +29,7 @@
 static struct cbe_regs_map
 {
        struct device_node *cpu_node;
+       struct device_node *be_node;
        struct cbe_pmd_regs __iomem *pmd_regs;
        struct cbe_iic_regs __iomem *iic_regs;
        struct cbe_mic_tm_regs __iomem *mic_tm_regs;
@@ -37,6 +40,7 @@ static int cbe_regs_map_count;
 static struct cbe_thread_map
 {
        struct device_node *cpu_node;
+       struct device_node *be_node;
        struct cbe_regs_map *regs;
        unsigned int thread_id;
        unsigned int cbe_id;
@@ -50,22 +54,29 @@ static struct cbe_regs_map *cbe_find_map(struct device_node 
*np)
        int i;
        struct device_node *tmp_np;
 
-       if (strcasecmp(np->type, "spe") == 0) {
-               if (np->data == NULL) {
-                       /* walk up path until cpu node was found */
-                       tmp_np = np->parent;
-                       while (tmp_np != NULL && strcasecmp(tmp_np->type, 
"cpu") != 0)
-                               tmp_np = tmp_np->parent;
+       if (strcasecmp(np->type, "spe")) {
+               for (i = 0; i < cbe_regs_map_count; i++)
+                       if (cbe_regs_maps[i].cpu_node == np ||
+                           cbe_regs_maps[i].be_node == np)
+                               return &cbe_regs_maps[i];
+               return NULL;
+       }
 
-                       np->data = cbe_find_map(tmp_np);
-               }
+       if (np->data)
                return np->data;
-       }
 
-       for (i = 0; i < cbe_regs_map_count; i++)
-               if (cbe_regs_maps[i].cpu_node == np)
-                       return &cbe_regs_maps[i];
-       return NULL;
+       /* walk up path until cpu or be node was found */
+       tmp_np = np;
+       do {
+               tmp_np = tmp_np->parent;
+               /* on a correct devicetree we wont get up to root */
+               BUG_ON(!tmp_np);
+       } while (strcasecmp(tmp_np->type, "cpu") &&
+                strcasecmp(tmp_np->type, "be"));
+
+       np->data = cbe_find_map(tmp_np);
+
+       return np->data;
 }
 
 struct cbe_pmd_regs __iomem *cbe_get_pmd_regs(struct device_node *np)
@@ -153,6 +164,67 @@ u32 cbe_node_to_cpu(int node)
 }
 EXPORT_SYMBOL_GPL(cbe_node_to_cpu);
 
+static struct device_node *cbe_get_be_node(int cpu_id)
+{
+       struct device_node *np;
+
+       for_each_node_by_type (np, "be") {
+               int len,i;
+               const phandle *cpu_handle;
+
+               cpu_handle = of_get_property(np, "cpus", &len);
+
+               for (i=0; i<len; i++)
+                       if (of_find_node_by_phandle(cpu_handle[i]) == 
of_get_cpu_node(cpu_id, NULL))
+                               return np;
+       }
+
+       return NULL;
+}
+
+void __init cbe_fill_regs_map(struct cbe_regs_map *map)
+{
+       if(map->be_node) {
+               struct device_node *be, *np;
+
+               be = map->be_node;
+
+               for_each_node_by_type(np, "pervasive")
+                       if (of_get_parent(np) == be)
+                               map->pmd_regs = of_iomap(np, 0);
+
+               for_each_node_by_type(np, "CBEA-Internal-Interrupt-Controller")
+                       if (of_get_parent(np) == be)
+                               map->iic_regs = of_iomap(np, 2);
+
+               for_each_node_by_type(np, "mic-tm")
+                       if (of_get_parent(np) == be)
+                               map->mic_tm_regs = of_iomap(np, 0);
+       } else {
+               struct device_node *cpu;
+               /* That hack must die die die ! */
+               const struct address_prop {
+                       unsigned long address;
+                       unsigned int len;
+               } __attribute__((packed)) *prop;
+
+               cpu = map->cpu_node;
+
+               prop = of_get_property(cpu, "pervasive", NULL);
+               if (prop != NULL)
+                       map->pmd_regs = ioremap(prop->address, prop->len);
+
+               prop = of_get_property(cpu, "iic", NULL);
+               if (prop != NULL)
+                       map->iic_regs = ioremap(prop->address, prop->len);
+
+               prop = of_get_property(cpu, "mic-tm", NULL);
+               if (prop != NULL)
+                       map->mic_tm_regs = ioremap(prop->address, prop->len);
+       }
+}
+
+
 void __init cbe_regs_init(void)
 {
        int i;
@@ -162,6 +234,7 @@ void __init cbe_regs_init(void)
        /* Build local fast map of CPUs */
        for_each_possible_cpu(i) {
                cbe_thread_map[i].cpu_node = of_get_cpu_node(i, &thread_id);
+               cbe_thread_map[i].be_node = cbe_get_be_node(i);
                cbe_thread_map[i].thread_id = thread_id;
        }
 
@@ -170,12 +243,6 @@ void __init cbe_regs_init(void)
                struct cbe_regs_map *map;
                unsigned int cbe_id;
 
-               /* That hack must die die die ! */
-               const struct address_prop {
-                       unsigned long address;
-                       unsigned int len;
-               } __attribute__((packed)) *prop;
-
                cbe_id = cbe_regs_map_count++;
                map = &cbe_regs_maps[cbe_id];
 
@@ -193,23 +260,14 @@ void __init cbe_regs_init(void)
                        if (thread->cpu_node == cpu) {
                                thread->regs = map;
                                thread->cbe_id = cbe_id;
+                               map->be_node = thread->be_node;
                                cpu_set(i, cbe_local_mask[cbe_id]);
                                if(thread->thread_id == 0)
                                        cpu_set(i, cbe_first_online_cpu);
                        }
                }
 
-               prop = of_get_property(cpu, "pervasive", NULL);
-               if (prop != NULL)
-                       map->pmd_regs = ioremap(prop->address, prop->len);
-
-               prop = of_get_property(cpu, "iic", NULL);
-               if (prop != NULL)
-                       map->iic_regs = ioremap(prop->address, prop->len);
-
-               prop = of_get_property(cpu, "mic-tm", NULL);
-               if (prop != NULL)
-                       map->mic_tm_regs = ioremap(prop->address, prop->len);
+               cbe_fill_regs_map(map);
        }
 }
 
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