diff options
| -rw-r--r-- | arch/sh/mm/pmb.c | 81 |
1 files changed, 26 insertions, 55 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index f01c8191144..baf365fcdb4 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -35,7 +35,7 @@ static void __pmb_unmap(struct pmb_entry *); -static struct kmem_cache *pmb_cache; +static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES]; static unsigned long pmb_map; static struct pmb_entry pmb_init_map[] = { @@ -73,32 +73,6 @@ static inline unsigned long mk_pmb_data(unsigned int entry) return mk_pmb_entry(entry) | PMB_DATA; } -static DEFINE_SPINLOCK(pmb_list_lock); -static struct pmb_entry *pmb_list; - -static inline void pmb_list_add(struct pmb_entry *pmbe) -{ - struct pmb_entry **p, *tmp; - - p = &pmb_list; - while ((tmp = *p) != NULL) - p = &tmp->next; - - pmbe->next = tmp; - *p = pmbe; -} - -static inline void pmb_list_del(struct pmb_entry *pmbe) -{ - struct pmb_entry **p, *tmp; - - for (p = &pmb_list; (tmp = *p); p = &tmp->next) - if (tmp == pmbe) { - *p = tmp->next; - return; - } -} - static int pmb_alloc_entry(void) { unsigned int pos; @@ -125,7 +99,7 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn, if (pos < 0) return ERR_PTR(pos); - pmbe = kmem_cache_alloc(pmb_cache, GFP_KERNEL); + pmbe = &pmb_entry_list[pos]; if (!pmbe) return ERR_PTR(-ENOMEM); @@ -134,20 +108,19 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn, pmbe->flags = flags; pmbe->entry = pos; - spin_lock_irq(&pmb_list_lock); - pmb_list_add(pmbe); - spin_unlock_irq(&pmb_list_lock); - return pmbe; } static void pmb_free(struct pmb_entry *pmbe) { - spin_lock_irq(&pmb_list_lock); - pmb_list_del(pmbe); - spin_unlock_irq(&pmb_list_lock); + int pos = pmbe->entry; - kmem_cache_free(pmb_cache, pmbe); + pmbe->vpn = 0; + pmbe->ppn = 0; + pmbe->flags = 0; + pmbe->entry = 0; + + clear_bit(pos, &pmb_map); } /* @@ -202,8 +175,6 @@ static void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe) ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr); back_to_cached(); - - clear_bit(entry, &pmb_map); } @@ -285,11 +256,16 @@ out: void pmb_unmap(unsigned long addr) { - struct pmb_entry **p, *pmbe; + struct pmb_entry *pmbe = NULL; + int i; - for (p = &pmb_list; (pmbe = *p); p = &pmbe->next) - if (pmbe->vpn == addr) - break; + for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) { + if (test_bit(i, &pmb_map)) { + pmbe = &pmb_entry_list[i]; + if (pmbe->vpn == addr) + break; + } + } if (unlikely(!pmbe)) return; @@ -299,7 +275,7 @@ void pmb_unmap(unsigned long addr) static void __pmb_unmap(struct pmb_entry *pmbe) { - WARN_ON(!test_bit(pmbe->entry, &pmb_map)); + BUG_ON(!test_bit(pmbe->entry, &pmb_map)); do { struct pmb_entry *pmblink = pmbe; @@ -322,11 +298,6 @@ static void __pmb_unmap(struct pmb_entry *pmbe) } while (pmbe); } -static void pmb_cache_ctor(void *pmb) -{ - memset(pmb, 0, sizeof(struct pmb_entry)); -} - int __uses_jump_to_uncached pmb_init(void) { unsigned int nr_entries = ARRAY_SIZE(pmb_init_map); @@ -334,9 +305,6 @@ int __uses_jump_to_uncached pmb_init(void) BUG_ON(unlikely(nr_entries >= NR_PMB_ENTRIES)); - pmb_cache = kmem_cache_create("pmb", sizeof(struct pmb_entry), 0, - SLAB_PANIC, pmb_cache_ctor); - jump_to_uncached(); /* @@ -431,15 +399,18 @@ postcore_initcall(pmb_debugfs_init); static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state) { static pm_message_t prev_state; + int i; /* Restore the PMB after a resume from hibernation */ if (state.event == PM_EVENT_ON && prev_state.event == PM_EVENT_FREEZE) { struct pmb_entry *pmbe; - spin_lock_irq(&pmb_list_lock); - for (pmbe = pmb_list; pmbe; pmbe = pmbe->next) - set_pmb_entry(pmbe); - spin_unlock_irq(&pmb_list_lock); + for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) { + if (test_bit(i, &pmb_map)) { + pmbe = &pmb_entry_list[i]; + set_pmb_entry(pmbe); + } + } } prev_state = state; return 0; |