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authorStephen Rothwell <sfr@canb.auug.org.au>2005-09-28 02:28:45 +1000
committerStephen Rothwell <sfr@canb.auug.org.au>2005-09-28 02:28:45 +1000
commite508f438e0c152dcd1fbec5104e9c0ee28f352d4 (patch)
treebf67e0848e8ec5c5c255a8223550e9970cbdc29d /arch/ppc64
parentcb5c7980ab16c461a883ec7899675be57798d285 (diff)
powerpc: Move iSeries_htab.c to powerpc/platforms/iseries
And rename it to htab.c Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'arch/ppc64')
-rw-r--r--arch/ppc64/kernel/Makefile3
-rw-r--r--arch/ppc64/kernel/iSeries_htab.c255
2 files changed, 1 insertions, 257 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 271b71d20d1..9225a6704e8 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -22,8 +22,7 @@ pci-obj-$(CONFIG_PPC_MULTIPLATFORM) += pci_dn.o pci_direct_iommu.o
obj-$(CONFIG_PCI) += pci.o pci_iommu.o iomap.o $(pci-obj-y)
-obj-$(CONFIG_PPC_ISERIES) += iSeries_htab.o \
- iSeries_iommu.o
+obj-$(CONFIG_PPC_ISERIES) += iSeries_iommu.o
obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o
diff --git a/arch/ppc64/kernel/iSeries_htab.c b/arch/ppc64/kernel/iSeries_htab.c
deleted file mode 100644
index 9a2be3abf34..00000000000
--- a/arch/ppc64/kernel/iSeries_htab.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * iSeries hashtable management.
- * Derived from pSeries_htab.c
- *
- * SMP scalability work:
- * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#include <asm/machdep.h>
-#include <asm/pgtable.h>
-#include <asm/mmu.h>
-#include <asm/mmu_context.h>
-#include <asm/iSeries/HvCallHpt.h>
-#include <asm/abs_addr.h>
-#include <linux/spinlock.h>
-
-static spinlock_t iSeries_hlocks[64] __cacheline_aligned_in_smp = { [0 ... 63] = SPIN_LOCK_UNLOCKED};
-
-/*
- * Very primitive algorithm for picking up a lock
- */
-static inline void iSeries_hlock(unsigned long slot)
-{
- if (slot & 0x8)
- slot = ~slot;
- spin_lock(&iSeries_hlocks[(slot >> 4) & 0x3f]);
-}
-
-static inline void iSeries_hunlock(unsigned long slot)
-{
- if (slot & 0x8)
- slot = ~slot;
- spin_unlock(&iSeries_hlocks[(slot >> 4) & 0x3f]);
-}
-
-static long iSeries_hpte_insert(unsigned long hpte_group, unsigned long va,
- unsigned long prpn, unsigned long vflags,
- unsigned long rflags)
-{
- unsigned long arpn;
- long slot;
- hpte_t lhpte;
- int secondary = 0;
-
- /*
- * The hypervisor tries both primary and secondary.
- * If we are being called to insert in the secondary,
- * it means we have already tried both primary and secondary,
- * so we return failure immediately.
- */
- if (vflags & HPTE_V_SECONDARY)
- return -1;
-
- iSeries_hlock(hpte_group);
-
- slot = HvCallHpt_findValid(&lhpte, va >> PAGE_SHIFT);
- BUG_ON(lhpte.v & HPTE_V_VALID);
-
- if (slot == -1) { /* No available entry found in either group */
- iSeries_hunlock(hpte_group);
- return -1;
- }
-
- if (slot < 0) { /* MSB set means secondary group */
- vflags |= HPTE_V_VALID;
- secondary = 1;
- slot &= 0x7fffffffffffffff;
- }
-
- arpn = phys_to_abs(prpn << PAGE_SHIFT) >> PAGE_SHIFT;
-
- lhpte.v = (va >> 23) << HPTE_V_AVPN_SHIFT | vflags | HPTE_V_VALID;
- lhpte.r = (arpn << HPTE_R_RPN_SHIFT) | rflags;
-
- /* Now fill in the actual HPTE */
- HvCallHpt_addValidate(slot, secondary, &lhpte);
-
- iSeries_hunlock(hpte_group);
-
- return (secondary << 3) | (slot & 7);
-}
-
-long iSeries_hpte_bolt_or_insert(unsigned long hpte_group,
- unsigned long va, unsigned long prpn, unsigned long vflags,
- unsigned long rflags)
-{
- long slot;
- hpte_t lhpte;
-
- slot = HvCallHpt_findValid(&lhpte, va >> PAGE_SHIFT);
-
- if (lhpte.v & HPTE_V_VALID) {
- /* Bolt the existing HPTE */
- HvCallHpt_setSwBits(slot, 0x10, 0);
- HvCallHpt_setPp(slot, PP_RWXX);
- return 0;
- }
-
- return iSeries_hpte_insert(hpte_group, va, prpn, vflags, rflags);
-}
-
-static unsigned long iSeries_hpte_getword0(unsigned long slot)
-{
- hpte_t hpte;
-
- HvCallHpt_get(&hpte, slot);
- return hpte.v;
-}
-
-static long iSeries_hpte_remove(unsigned long hpte_group)
-{
- unsigned long slot_offset;
- int i;
- unsigned long hpte_v;
-
- /* Pick a random slot to start at */
- slot_offset = mftb() & 0x7;
-
- iSeries_hlock(hpte_group);
-
- for (i = 0; i < HPTES_PER_GROUP; i++) {
- hpte_v = iSeries_hpte_getword0(hpte_group + slot_offset);
-
- if (! (hpte_v & HPTE_V_BOLTED)) {
- HvCallHpt_invalidateSetSwBitsGet(hpte_group +
- slot_offset, 0, 0);
- iSeries_hunlock(hpte_group);
- return i;
- }
-
- slot_offset++;
- slot_offset &= 0x7;
- }
-
- iSeries_hunlock(hpte_group);
-
- return -1;
-}
-
-/*
- * The HyperVisor expects the "flags" argument in this form:
- * bits 0..59 : reserved
- * bit 60 : N
- * bits 61..63 : PP2,PP1,PP0
- */
-static long iSeries_hpte_updatepp(unsigned long slot, unsigned long newpp,
- unsigned long va, int large, int local)
-{
- hpte_t hpte;
- unsigned long avpn = va >> 23;
-
- iSeries_hlock(slot);
-
- HvCallHpt_get(&hpte, slot);
- if ((HPTE_V_AVPN_VAL(hpte.v) == avpn) && (hpte.v & HPTE_V_VALID)) {
- /*
- * Hypervisor expects bits as NPPP, which is
- * different from how they are mapped in our PP.
- */
- HvCallHpt_setPp(slot, (newpp & 0x3) | ((newpp & 0x4) << 1));
- iSeries_hunlock(slot);
- return 0;
- }
- iSeries_hunlock(slot);
-
- return -1;
-}
-
-/*
- * Functions used to find the PTE for a particular virtual address.
- * Only used during boot when bolting pages.
- *
- * Input : vpn : virtual page number
- * Output: PTE index within the page table of the entry
- * -1 on failure
- */
-static long iSeries_hpte_find(unsigned long vpn)
-{
- hpte_t hpte;
- long slot;
-
- /*
- * The HvCallHpt_findValid interface is as follows:
- * 0xffffffffffffffff : No entry found.
- * 0x00000000xxxxxxxx : Entry found in primary group, slot x
- * 0x80000000xxxxxxxx : Entry found in secondary group, slot x
- */
- slot = HvCallHpt_findValid(&hpte, vpn);
- if (hpte.v & HPTE_V_VALID) {
- if (slot < 0) {
- slot &= 0x7fffffffffffffff;
- slot = -slot;
- }
- } else
- slot = -1;
- return slot;
-}
-
-/*
- * Update the page protection bits. Intended to be used to create
- * guard pages for kernel data structures on pages which are bolted
- * in the HPT. Assumes pages being operated on will not be stolen.
- * Does not work on large pages.
- *
- * No need to lock here because we should be the only user.
- */
-static void iSeries_hpte_updateboltedpp(unsigned long newpp, unsigned long ea)
-{
- unsigned long vsid,va,vpn;
- long slot;
-
- vsid = get_kernel_vsid(ea);
- va = (vsid << 28) | (ea & 0x0fffffff);
- vpn = va >> PAGE_SHIFT;
- slot = iSeries_hpte_find(vpn);
- if (slot == -1)
- panic("updateboltedpp: Could not find page to bolt\n");
- HvCallHpt_setPp(slot, newpp);
-}
-
-static void iSeries_hpte_invalidate(unsigned long slot, unsigned long va,
- int large, int local)
-{
- unsigned long hpte_v;
- unsigned long avpn = va >> 23;
- unsigned long flags;
-
- local_irq_save(flags);
-
- iSeries_hlock(slot);
-
- hpte_v = iSeries_hpte_getword0(slot);
-
- if ((HPTE_V_AVPN_VAL(hpte_v) == avpn) && (hpte_v & HPTE_V_VALID))
- HvCallHpt_invalidateSetSwBitsGet(slot, 0, 0);
-
- iSeries_hunlock(slot);
-
- local_irq_restore(flags);
-}
-
-void hpte_init_iSeries(void)
-{
- ppc_md.hpte_invalidate = iSeries_hpte_invalidate;
- ppc_md.hpte_updatepp = iSeries_hpte_updatepp;
- ppc_md.hpte_updateboltedpp = iSeries_hpte_updateboltedpp;
- ppc_md.hpte_insert = iSeries_hpte_insert;
- ppc_md.hpte_remove = iSeries_hpte_remove;
-
- htab_finish_init();
-}