diff options
author | Paul Mundt <lethal@linux-sh.org> | 2010-01-19 07:20:35 +0100 |
---|---|---|
committer | Paul Mundt <lethal@linux-sh.org> | 2010-01-19 07:20:35 +0100 |
commit | bb29c677b366fdf4f6522cd82228a32567aa98c7 (patch) | |
tree | 0235c7477ed635c8c21131b90094d151663ae889 /arch/sh/mm | |
parent | sh: Provide a dummy _PAGE_WIRED flag for non-X2TLB parts. (diff) | |
download | linux-bb29c677b366fdf4f6522cd82228a32567aa98c7.tar.xz linux-bb29c677b366fdf4f6522cd82228a32567aa98c7.zip |
sh: Split out MMUCR.URB based entry wiring in to shared helper.
Presently this is duplicated between tlb-sh4 and tlb-pteaex. Split the
helpers out in to a generic tlb-urb that can be used by any parts
equipped with MMUCR.URB.
At the same time, move the SH-5 code out-of-line, as we require single
global state for DTLB entry wiring.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r-- | arch/sh/mm/Makefile | 4 | ||||
-rw-r--r-- | arch/sh/mm/tlb-pteaex.c | 66 | ||||
-rw-r--r-- | arch/sh/mm/tlb-sh4.c | 66 | ||||
-rw-r--r-- | arch/sh/mm/tlb-sh5.c | 39 | ||||
-rw-r--r-- | arch/sh/mm/tlb-urb.c | 81 |
5 files changed, 122 insertions, 134 deletions
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile index 0027cdea2c20..de714cbd961a 100644 --- a/arch/sh/mm/Makefile +++ b/arch/sh/mm/Makefile @@ -26,9 +26,9 @@ endif ifdef CONFIG_MMU tlb-$(CONFIG_CPU_SH3) := tlb-sh3.o -tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o +tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o tlb-urb.o tlb-$(CONFIG_CPU_SH5) := tlb-sh5.o -tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o +tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o tlb-urb.o obj-y += $(tlb-y) endif diff --git a/arch/sh/mm/tlb-pteaex.c b/arch/sh/mm/tlb-pteaex.c index 88c8bb05e16d..409b7c2b4b9d 100644 --- a/arch/sh/mm/tlb-pteaex.c +++ b/arch/sh/mm/tlb-pteaex.c @@ -76,69 +76,3 @@ void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid, __raw_writel(asid, MMU_UTLB_ADDRESS_ARRAY2 | MMU_PAGE_ASSOC_BIT); back_to_cached(); } - -/* - * Load the entry for 'addr' into the TLB and wire the entry. - */ -void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte) -{ - unsigned long status, flags; - int urb; - - local_irq_save(flags); - - /* Load the entry into the TLB */ - __update_tlb(vma, addr, pte); - - /* ... and wire it up. */ - status = ctrl_inl(MMUCR); - urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; - status &= ~MMUCR_URB; - - /* - * Make sure we're not trying to wire the last TLB entry slot. - */ - BUG_ON(!--urb); - - urb = urb % MMUCR_URB_NENTRIES; - - status |= (urb << MMUCR_URB_SHIFT); - ctrl_outl(status, MMUCR); - ctrl_barrier(); - - local_irq_restore(flags); -} - -/* - * Unwire the last wired TLB entry. - * - * It should also be noted that it is not possible to wire and unwire - * TLB entries in an arbitrary order. If you wire TLB entry N, followed - * by entry N+1, you must unwire entry N+1 first, then entry N. In this - * respect, it works like a stack or LIFO queue. - */ -void tlb_unwire_entry(void) -{ - unsigned long status, flags; - int urb; - - local_irq_save(flags); - - status = ctrl_inl(MMUCR); - urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; - status &= ~MMUCR_URB; - - /* - * Make sure we're not trying to unwire a TLB entry when none - * have been wired. - */ - BUG_ON(urb++ == MMUCR_URB_NENTRIES); - - urb = urb % MMUCR_URB_NENTRIES; - - status |= (urb << MMUCR_URB_SHIFT); - ctrl_outl(status, MMUCR); - ctrl_barrier(); - - local_irq_restore(flags); -} diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c index 4c6234743318..8cf550e2570f 100644 --- a/arch/sh/mm/tlb-sh4.c +++ b/arch/sh/mm/tlb-sh4.c @@ -81,69 +81,3 @@ void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid, ctrl_outl(data, addr); back_to_cached(); } - -/* - * Load the entry for 'addr' into the TLB and wire the entry. - */ -void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte) -{ - unsigned long status, flags; - int urb; - - local_irq_save(flags); - - /* Load the entry into the TLB */ - __update_tlb(vma, addr, pte); - - /* ... and wire it up. */ - status = ctrl_inl(MMUCR); - urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; - status &= ~MMUCR_URB; - - /* - * Make sure we're not trying to wire the last TLB entry slot. - */ - BUG_ON(!--urb); - - urb = urb % MMUCR_URB_NENTRIES; - - status |= (urb << MMUCR_URB_SHIFT); - ctrl_outl(status, MMUCR); - ctrl_barrier(); - - local_irq_restore(flags); -} - -/* - * Unwire the last wired TLB entry. - * - * It should also be noted that it is not possible to wire and unwire - * TLB entries in an arbitrary order. If you wire TLB entry N, followed - * by entry N+1, you must unwire entry N+1 first, then entry N. In this - * respect, it works like a stack or LIFO queue. - */ -void tlb_unwire_entry(void) -{ - unsigned long status, flags; - int urb; - - local_irq_save(flags); - - status = ctrl_inl(MMUCR); - urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; - status &= ~MMUCR_URB; - - /* - * Make sure we're not trying to unwire a TLB entry when none - * have been wired. - */ - BUG_ON(urb++ == MMUCR_URB_NENTRIES); - - urb = urb % MMUCR_URB_NENTRIES; - - status |= (urb << MMUCR_URB_SHIFT); - ctrl_outl(status, MMUCR); - ctrl_barrier(); - - local_irq_restore(flags); -} diff --git a/arch/sh/mm/tlb-sh5.c b/arch/sh/mm/tlb-sh5.c index fdb64e41ec50..f27dbe1c1599 100644 --- a/arch/sh/mm/tlb-sh5.c +++ b/arch/sh/mm/tlb-sh5.c @@ -143,3 +143,42 @@ void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr, */ void sh64_teardown_tlb_slot(unsigned long long config_addr) __attribute__ ((alias("__flush_tlb_slot"))); + +static int dtlb_entry; +static unsigned long long dtlb_entries[64]; + +void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte) +{ + unsigned long long entry; + unsigned long paddr, flags; + + BUG_ON(dtlb_entry == ARRAY_SIZE(dtlb_entries)); + + local_irq_save(flags); + + entry = sh64_get_wired_dtlb_entry(); + dtlb_entries[dtlb_entry++] = entry; + + paddr = pte_val(pte) & _PAGE_FLAGS_HARDWARE_MASK; + paddr &= ~PAGE_MASK; + + sh64_setup_tlb_slot(entry, addr, get_asid(), paddr); + + local_irq_restore(flags); +} + +void tlb_unwire_entry(void) +{ + unsigned long long entry; + unsigned long flags; + + BUG_ON(!dtlb_entry); + + local_irq_save(flags); + entry = dtlb_entries[dtlb_entry--]; + + sh64_teardown_tlb_slot(entry); + sh64_put_wired_dtlb_entry(entry); + + local_irq_restore(flags); +} diff --git a/arch/sh/mm/tlb-urb.c b/arch/sh/mm/tlb-urb.c new file mode 100644 index 000000000000..bb5b9098956d --- /dev/null +++ b/arch/sh/mm/tlb-urb.c @@ -0,0 +1,81 @@ +/* + * arch/sh/mm/tlb-urb.c + * + * TLB entry wiring helpers for URB-equipped parts. + * + * Copyright (C) 2010 Matt Fleming + * + * 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/mm.h> +#include <linux/io.h> +#include <asm/tlb.h> +#include <asm/mmu_context.h> + +/* + * Load the entry for 'addr' into the TLB and wire the entry. + */ +void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte) +{ + unsigned long status, flags; + int urb; + + local_irq_save(flags); + + /* Load the entry into the TLB */ + __update_tlb(vma, addr, pte); + + /* ... and wire it up. */ + status = __raw_readl(MMUCR); + urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; + status &= ~MMUCR_URB; + + /* + * Make sure we're not trying to wire the last TLB entry slot. + */ + BUG_ON(!--urb); + + urb = urb % MMUCR_URB_NENTRIES; + + status |= (urb << MMUCR_URB_SHIFT); + __raw_writel(status, MMUCR); + ctrl_barrier(); + + local_irq_restore(flags); +} + +/* + * Unwire the last wired TLB entry. + * + * It should also be noted that it is not possible to wire and unwire + * TLB entries in an arbitrary order. If you wire TLB entry N, followed + * by entry N+1, you must unwire entry N+1 first, then entry N. In this + * respect, it works like a stack or LIFO queue. + */ +void tlb_unwire_entry(void) +{ + unsigned long status, flags; + int urb; + + local_irq_save(flags); + + status = __raw_readl(MMUCR); + urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; + status &= ~MMUCR_URB; + + /* + * Make sure we're not trying to unwire a TLB entry when none + * have been wired. + */ + BUG_ON(urb++ == MMUCR_URB_NENTRIES); + + urb = urb % MMUCR_URB_NENTRIES; + + status |= (urb << MMUCR_URB_SHIFT); + __raw_writel(status, MMUCR); + ctrl_barrier(); + + local_irq_restore(flags); +} |