sparc32: centralize all mmu context handling in srmmu.c
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index ab62595..ad93d2e 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -55,10 +55,6 @@
int vac_cache_size;
int vac_line_size;
-struct ctx_list *ctx_list_pool;
-struct ctx_list ctx_free;
-struct ctx_list ctx_used;
-
extern struct resource sparc_iomap;
extern unsigned long last_valid_pfn;
@@ -355,8 +351,39 @@
srmmu_free_nocache(__nocache_va(p), PTE_SIZE);
}
-/*
- */
+/* context handling - a dynamically sized pool is used */
+#define NO_CONTEXT -1
+
+struct ctx_list {
+ struct ctx_list *next;
+ struct ctx_list *prev;
+ unsigned int ctx_number;
+ struct mm_struct *ctx_mm;
+};
+
+static struct ctx_list *ctx_list_pool;
+static struct ctx_list ctx_free;
+static struct ctx_list ctx_used;
+
+/* At boot time we determine the number of contexts */
+static int num_contexts;
+
+static inline void remove_from_ctx_list(struct ctx_list *entry)
+{
+ entry->next->prev = entry->prev;
+ entry->prev->next = entry->next;
+}
+
+static inline void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry)
+{
+ entry->next = head;
+ (entry->prev = head->prev)->next = entry;
+ head->prev = entry;
+}
+#define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry)
+#define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry)
+
+
static inline void alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
{
struct ctx_list *ctxp;
@@ -392,6 +419,26 @@
add_to_free_ctxlist(ctx_old);
}
+static void __init sparc_context_init(int numctx)
+{
+ int ctx;
+ unsigned long size;
+
+ size = numctx * sizeof(struct ctx_list);
+ ctx_list_pool = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
+
+ for (ctx = 0; ctx < numctx; ctx++) {
+ struct ctx_list *clist;
+
+ clist = (ctx_list_pool + ctx);
+ clist->ctx_number = ctx;
+ clist->ctx_mm = NULL;
+ }
+ ctx_free.next = ctx_free.prev = &ctx_free;
+ ctx_used.next = ctx_used.prev = &ctx_used;
+ for (ctx = 0; ctx < numctx; ctx++)
+ add_to_free_ctxlist(ctx_list_pool + ctx);
+}
void switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
struct task_struct *tsk)
@@ -799,9 +846,6 @@
}
}
-/* Paging initialization on the Sparc Reference MMU. */
-extern void sparc_context_init(int);
-
void (*poke_srmmu)(void) __cpuinitdata = NULL;
extern unsigned long bootmem_init(unsigned long *pages_avail);
@@ -816,6 +860,7 @@
pte_t *pte;
unsigned long pages_avail;
+ init_mm.context = (unsigned long) NO_CONTEXT;
sparc_iomap.start = SUN4M_IOBASE_VADDR; /* 16MB of IOSPACE on all sun4m's. */
if (sparc_cpu_model == sun4d)
@@ -918,6 +963,12 @@
srmmu_nocache_map.used << SRMMU_NOCACHE_BITMAP_SHIFT);
}
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+ mm->context = NO_CONTEXT;
+ return 0;
+}
+
void destroy_context(struct mm_struct *mm)
{