[PATCH] spufs: fix local store page refcounting

[linux-2.6-omap-h63xx.git] / arch / powerpc / platforms / cell / setup.c

diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index 9a495634d0c238aeaef80aa3b675dc5a3ef3f8e8..c41a6e2e2c3011b5686a7a63bfba240da0d2a1a2 100644 (file)
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -33,6 +33,7 @@
 #include <asm/mmu.h>
 #include <asm/processor.h>
 #include <asm/io.h>
+#include <asm/kexec.h>
 #include <asm/pgtable.h>
 #include <asm/prom.h>
 #include <asm/rtas.h>
@@ -67,6 +68,77 @@ void cell_show_cpuinfo(struct seq_file *m)
        of_node_put(root);
 }
 
+#ifdef CONFIG_SPARSEMEM
+static int __init find_spu_node_id(struct device_node *spe)
+{
+       unsigned int *id;
+#ifdef CONFIG_NUMA
+       struct device_node *cpu;
+       cpu = spe->parent->parent;
+       id = (unsigned int *)get_property(cpu, "node-id", NULL);
+#else
+       id = NULL;
+#endif
+       return id ? *id : 0;
+}
+
+static void __init cell_spuprop_present(struct device_node *spe,
+                                      const char *prop, int early)
+{
+       struct address_prop {
+               unsigned long address;
+               unsigned int len;
+       } __attribute__((packed)) *p;
+       int proplen;
+
+       unsigned long start_pfn, end_pfn, pfn;
+       int node_id;
+
+       p = (void*)get_property(spe, prop, &proplen);
+       WARN_ON(proplen != sizeof (*p));
+
+       node_id = find_spu_node_id(spe);
+
+       start_pfn = p->address >> PAGE_SHIFT;
+       end_pfn = (p->address + p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+       /* We need to call memory_present *before* the call to sparse_init,
+          but we can initialize the page structs only *after* that call.
+          Thus, we're being called twice. */
+       if (early)
+               memory_present(node_id, start_pfn, end_pfn);
+       else {
+               /* As the pages backing SPU LS and I/O are outside the range
+                  of regular memory, their page structs were not initialized
+                  by free_area_init. Do it here instead. */
+               for (pfn = start_pfn; pfn < end_pfn; pfn++) {
+                       struct page *page = pfn_to_page(pfn);
+                       set_page_links(page, ZONE_DMA, node_id, pfn);
+                       set_page_count(page, 1);
+                       reset_page_mapcount(page);
+                       SetPageReserved(page);
+                       INIT_LIST_HEAD(&page->lru);
+               }
+       }
+}
+
+static void __init cell_spumem_init(int early)
+{
+       struct device_node *node;
+       for (node = of_find_node_by_type(NULL, "spe");
+                       node; node = of_find_node_by_type(node, "spe")) {
+               cell_spuprop_present(node, "local-store", early);
+               cell_spuprop_present(node, "problem", early);
+               cell_spuprop_present(node, "priv1", early);
+               cell_spuprop_present(node, "priv2", early);
+       }
+}
+#else
+static void __init cell_spumem_init(int early)
+{
+}
+#endif
+
 static void cell_progress(char *s, unsigned short hex)
 {
        printk("*** %04x : %s\n", hex, s ? s : "");
@@ -98,6 +170,8 @@ static void __init cell_setup_arch(void)
 #endif
 
        mmio_nvram_init();
+
+       cell_spumem_init(0);
 }
 
 /*
@@ -113,6 +187,8 @@ static void __init cell_init_early(void)
 
        ppc64_interrupt_controller = IC_CELL_PIC;
 
+       cell_spumem_init(1);
+
        DBG(" <- cell_init_early()\n");
 }
 
@@ -138,4 +214,9 @@ struct machdep_calls __initdata cell_md = {
        .set_rtc_time           = rtas_set_rtc_time,
        .calibrate_decr         = generic_calibrate_decr,
        .progress               = cell_progress,
+#ifdef CONFIG_KEXEC
+       .machine_kexec          = default_machine_kexec,
+       .machine_kexec_prepare  = default_machine_kexec_prepare,
+       .machine_crash_shutdown = default_machine_crash_shutdown,
+#endif
 };