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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>
This commit is contained in:
Sam Ravnborg 2012-07-26 11:02:24 +00:00 committed by David S. Miller
parent 59b00c792f
commit b585e8551b
6 changed files with 63 additions and 71 deletions
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8
arch/sparc/include/asm/mmu_context_32.h
View File

@ -9,14 +9,12 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}
/*
* Initialize a new mmu context. This is invoked when a new
/* Initialize a new mmu context. This is invoked when a new
* address space instance (unique or shared) is instantiated.
*/
#define init_new_context(tsk, mm) (((mm)->context = NO_CONTEXT), 0)
int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
/*
* Destroy a dead context. This occurs when mmput drops the
/* Destroy a dead context. This occurs when mmput drops the
* mm_users count to zero, the mmaps have been released, and
* all the page tables have been flushed. Our job is to destroy
* any remaining processor-specific state.

32
arch/sparc/include/asm/pgtable_32.h
View File

@ -79,8 +79,6 @@ extern unsigned long ptr_in_current_pgd;
#define __S110 PAGE_SHARED
#define __S111 PAGE_SHARED
extern int num_contexts;
/* First physical page can be anywhere, the following is needed so that
* va-->pa and vice versa conversions work properly without performance
* hit for all __pa()/__va() operations.
@ -399,36 +397,6 @@ static inline pte_t pgoff_to_pte(unsigned long pgoff)
*/
#define PTE_FILE_MAX_BITS 24
/*
*/
struct ctx_list {
struct ctx_list *next;
struct ctx_list *prev;
unsigned int ctx_number;
struct mm_struct *ctx_mm;
};
extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */
extern struct ctx_list ctx_free; /* Head of free list */
extern struct ctx_list ctx_used; /* Head of used contexts list */
#define NO_CONTEXT -1
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 unsigned long
__get_phys (unsigned long addr)
{

1
arch/sparc/kernel/setup_32.c
View File

@ -371,7 +371,6 @@ void __init setup_arch(char **cmdline_p)
(*(linux_dbvec->teach_debugger))();
}
init_mm.context = (unsigned long) NO_CONTEXT;
init_task.thread.kregs = &fake_swapper_regs;
/* Run-time patch instructions to match the cpu model */

6
arch/sparc/mm/fault_32.c
View File

@ -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)
{

18
arch/sparc/mm/init_32.c
View File

@ -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;

69
arch/sparc/mm/srmmu.c
View File

@ -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)
{