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authorSam Ravnborg <sam@ravnborg.org>2012-07-26 15:02:24 +0400
committerDavid S. Miller <davem@davemloft.net>2012-07-27 03:46:16 +0400
commitb585e8551b352cee95cf060b7eddc76d16e6120a (patch)
tree92f5346a503111037a5cbb80b0892b7a04fd97c6 /arch/sparc/mm
parent59b00c792f0302b43e098849febc52386be5fd54 (diff)
downloadlinux-b585e8551b352cee95cf060b7eddc76d16e6120a.tar.xz
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>
Diffstat (limited to 'arch/sparc/mm')
-rw-r--r--arch/sparc/mm/fault_32.c6
-rw-r--r--arch/sparc/mm/init_32.c18
-rw-r--r--arch/sparc/mm/srmmu.c69
3 files changed, 60 insertions, 33 deletions
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index f46cf6be3370..e58f9ee718cb 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -32,12 +32,6 @@
int show_unhandled_signals = 1;
-/* At boot time we determine these two values necessary for setting
- * up the segment maps and page table entries (pte's).
- */
-
-int num_contexts;
-
/* Return how much physical memory we have. */
unsigned long probe_memory(void)
{
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index 6d44c2b80d66..020d2afa0030 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -82,24 +82,6 @@ void show_mem(unsigned int filter)
#endif
}
-void __init sparc_context_init(int numctx)
-{
- int ctx;
-
- ctx_list_pool = __alloc_bootmem(numctx * sizeof(struct ctx_list), 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);
-}
extern unsigned long cmdline_memory_size;
unsigned long last_valid_pfn;
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index ab62595cf366..ad93d2ee6be2 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -55,10 +55,6 @@ static unsigned int hwbug_bitmask;
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 @@ void pte_free(struct mm_struct *mm, pgtable_t pte)
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 @@ static inline void free_context(int context)
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 @@ static void __init map_kernel(void)
}
}
-/* 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 @@ void __init srmmu_paging_init(void)
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 @@ void mmu_info(struct seq_file *m)
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)
{