diff options
| -rw-r--r-- | arch/sh/include/asm/mmu.h | 2 | ||||
| -rw-r--r-- | arch/sh/kernel/setup.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/Makefile | 3 | ||||
| -rw-r--r-- | arch/sh/mm/pmb-fixed.c | 45 | ||||
| -rw-r--r-- | arch/sh/mm/pmb.c | 65 |
5 files changed, 64 insertions, 53 deletions
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h index 9c84b45..c7426ad 100644 --- a/arch/sh/include/asm/mmu.h +++ b/arch/sh/include/asm/mmu.h @@ -15,6 +15,8 @@ #define PMB_E_MASK 0x0000000f #define PMB_E_SHIFT 8 +#define PMB_PFN_MASK 0xff000000 + #define PMB_SZ_16M 0x00000000 #define PMB_SZ_64M 0x00000010 #define PMB_SZ_128M 0x00000080 diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 8fdd03a..df65fe2 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -453,7 +453,7 @@ void __init setup_arch(char **cmdline_p) paging_init(); -#ifdef CONFIG_PMB +#ifdef CONFIG_PMB_ENABLE pmb_init(); #endif diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile index 3759bf8..8a70535 100644 --- a/arch/sh/mm/Makefile +++ b/arch/sh/mm/Makefile @@ -33,8 +33,7 @@ obj-y += $(tlb-y) endif obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o -obj-$(CONFIG_PMB) += pmb.o -obj-$(CONFIG_PMB_FIXED) += pmb-fixed.o +obj-$(CONFIG_PMB_ENABLE) += pmb.o obj-$(CONFIG_NUMA) += numa.o # Special flags for fault_64.o. This puts restrictions on the number of diff --git a/arch/sh/mm/pmb-fixed.c b/arch/sh/mm/pmb-fixed.c deleted file mode 100644 index 43c8eac..0000000 --- a/arch/sh/mm/pmb-fixed.c +++ /dev/null @@ -1,45 +0,0 @@ -/* - * arch/sh/mm/fixed_pmb.c - * - * Copyright (C) 2009 Renesas Solutions Corp. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/init.h> -#include <linux/mm.h> -#include <linux/io.h> -#include <asm/mmu.h> -#include <asm/mmu_context.h> - -static int __uses_jump_to_uncached fixed_pmb_init(void) -{ - int i; - unsigned long addr, data; - - jump_to_uncached(); - - for (i = 0; i < PMB_ENTRY_MAX; i++) { - addr = PMB_DATA + (i << PMB_E_SHIFT); - data = ctrl_inl(addr); - if (!(data & PMB_V)) - continue; - - if (data & PMB_C) { -#if defined(CONFIG_CACHE_WRITETHROUGH) - data |= PMB_WT; -#elif defined(CONFIG_CACHE_WRITEBACK) - data &= ~PMB_WT; -#else - data &= ~(PMB_C | PMB_WT); -#endif - } - ctrl_outl(data, addr); - } - - back_to_cached(); - - return 0; -} -arch_initcall(fixed_pmb_init); diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 7e64f6d..280f6a1 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -70,14 +70,20 @@ repeat: } static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn, - unsigned long flags) + unsigned long flags, int entry) { struct pmb_entry *pmbe; int pos; - pos = pmb_alloc_entry(); - if (pos < 0) - return ERR_PTR(pos); + if (entry == PMB_NO_ENTRY) { + pos = pmb_alloc_entry(); + if (pos < 0) + return ERR_PTR(pos); + } else { + if (test_bit(entry, &pmb_map)) + return ERR_PTR(-ENOSPC); + pos = entry; + } pmbe = &pmb_entry_list[pos]; if (!pmbe) @@ -187,7 +193,8 @@ again: if (size < pmb_sizes[i].size) continue; - pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag); + pmbe = pmb_alloc(vaddr, phys, pmb_flags | pmb_sizes[i].flag, + PMB_NO_ENTRY); if (IS_ERR(pmbe)) { err = PTR_ERR(pmbe); goto out; @@ -272,6 +279,7 @@ static void __pmb_unmap(struct pmb_entry *pmbe) } while (pmbe); } +#ifdef CONFIG_PMB int __uses_jump_to_uncached pmb_init(void) { unsigned int i; @@ -309,6 +317,53 @@ int __uses_jump_to_uncached pmb_init(void) return 0; } +#else +int __uses_jump_to_uncached pmb_init(void) +{ + int i; + unsigned long addr, data; + + jump_to_uncached(); + + for (i = 0; i < PMB_ENTRY_MAX; i++) { + struct pmb_entry *pmbe; + unsigned long vpn, ppn, flags; + + addr = PMB_DATA + (i << PMB_E_SHIFT); + data = ctrl_inl(addr); + if (!(data & PMB_V)) + continue; + + if (data & PMB_C) { +#if defined(CONFIG_CACHE_WRITETHROUGH) + data |= PMB_WT; +#elif defined(CONFIG_CACHE_WRITEBACK) + data &= ~PMB_WT; +#else + data &= ~(PMB_C | PMB_WT); +#endif + } + ctrl_outl(data, addr); + + ppn = data & PMB_PFN_MASK; + + flags = data & (PMB_C | PMB_WT | PMB_UB); + flags |= data & PMB_SZ_MASK; + + addr = PMB_ADDR + (i << PMB_E_SHIFT); + data = ctrl_inl(addr); + + vpn = data & PMB_PFN_MASK; + + pmbe = pmb_alloc(vpn, ppn, flags, i); + WARN_ON(IS_ERR(pmbe)); + } + + back_to_cached(); + + return 0; +} +#endif /* CONFIG_PMB */ static int pmb_seq_show(struct seq_file *file, void *iter) { |
