#include "platform.h"
-#if defined(DEBUG)
-#define DBG udbg_printf
-#else
-#define DBG pr_debug
-#endif
-
-static struct hash_pte *htab;
-static unsigned long htab_addr;
-static unsigned char *bolttab;
-static unsigned char *inusetab;
-
-static DEFINE_SPINLOCK(ps3_bolttab_lock);
-
-#define debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g) \
- _debug_dump_hpte(_a, _b, _c, _d, _e, _f, _g, __func__, __LINE__)
-static void _debug_dump_hpte(unsigned long pa, unsigned long va,
- unsigned long group, unsigned long bitmap, struct hash_pte lhpte,
- int psize, unsigned long slot, const char* func, int line)
-{
- DBG("%s:%d: pa = %lxh\n", func, line, pa);
- DBG("%s:%d: lpar = %lxh\n", func, line,
- ps3_mm_phys_to_lpar(pa));
- DBG("%s:%d: va = %lxh\n", func, line, va);
- DBG("%s:%d: group = %lxh\n", func, line, group);
- DBG("%s:%d: bitmap = %lxh\n", func, line, bitmap);
- DBG("%s:%d: hpte.v = %lxh\n", func, line, lhpte.v);
- DBG("%s:%d: hpte.r = %lxh\n", func, line, lhpte.r);
- DBG("%s:%d: psize = %xh\n", func, line, psize);
- DBG("%s:%d: slot = %lxh\n", func, line, slot);
-}
+/**
+ * enum lpar_vas_id - id of LPAR virtual address space.
+ * @lpar_vas_id_current: Current selected virtual address space
+ *
+ * Identify the target LPAR address space.
+ */
+
+enum ps3_lpar_vas_id {
+ PS3_LPAR_VAS_ID_CURRENT = 0,
+};
+
+
+static DEFINE_SPINLOCK(ps3_htab_lock);
static long ps3_hpte_insert(unsigned long hpte_group, unsigned long va,
unsigned long pa, unsigned long rflags, unsigned long vflags,
int psize, int ssize)
{
- unsigned long slot;
- struct hash_pte lhpte;
- int secondary = 0;
- unsigned long result;
- unsigned long bitmap;
+ int result;
+ u64 hpte_v, hpte_r;
+ u64 inserted_index;
+ u64 evicted_v, evicted_r;
+ u64 hpte_v_array[4], hpte_rs;
unsigned long flags;
- unsigned long p_pteg, s_pteg, b_index, b_mask, cb, ci;
-
- vflags &= ~HPTE_V_SECONDARY; /* this bit is ignored */
-
- lhpte.v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M) |
- vflags | HPTE_V_VALID;
- lhpte.r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags;
-
- p_pteg = hpte_group / HPTES_PER_GROUP;
- s_pteg = ~p_pteg & htab_hash_mask;
-
- spin_lock_irqsave(&ps3_bolttab_lock, flags);
-
- BUG_ON(bolttab[p_pteg] == 0xff && bolttab[s_pteg] == 0xff);
+ long ret = -1;
- bitmap = (inusetab[p_pteg] << 8) | inusetab[s_pteg];
+ /*
+ * lv1_insert_htab_entry() will search for victim
+ * entry in both primary and secondary pte group
+ */
+ vflags &= ~HPTE_V_SECONDARY;
- if (bitmap == 0xffff) {
- /*
- * PTEG is full. Search for victim.
- */
- bitmap &= ~((bolttab[p_pteg] << 8) | bolttab[s_pteg]);
- do {
- ci = mftb() & 15;
- cb = 0x8000UL >> ci;
- } while ((cb & bitmap) == 0);
- } else {
- /*
- * search free slot in hardware order
- * [primary] 0, 2, 4, 6, 1, 3, 5, 7
- * [secondary] 0, 2, 4, 6, 1, 3, 5, 7
- */
- for (ci = 0; ci < HPTES_PER_GROUP; ci += 2) {
- cb = 0x8000UL >> ci;
- if ((cb & bitmap) == 0)
- goto found;
- }
- for (ci = 1; ci < HPTES_PER_GROUP; ci += 2) {
- cb = 0x8000UL >> ci;
- if ((cb & bitmap) == 0)
- goto found;
- }
- for (ci = HPTES_PER_GROUP; ci < HPTES_PER_GROUP*2; ci += 2) {
- cb = 0x8000UL >> ci;
- if ((cb & bitmap) == 0)
- goto found;
- }
- for (ci = HPTES_PER_GROUP+1; ci < HPTES_PER_GROUP*2; ci += 2) {
- cb = 0x8000UL >> ci;
- if ((cb & bitmap) == 0)
- goto found;
- }
- }
+ hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID;
+ hpte_r = hpte_encode_r(ps3_mm_phys_to_lpar(pa), psize) | rflags;
-found:
- if (ci < HPTES_PER_GROUP) {
- slot = p_pteg * HPTES_PER_GROUP + ci;
- } else {
- slot = s_pteg * HPTES_PER_GROUP + (ci & 7);
- /* lhpte.dw0.dw0.h = 1; */
- vflags |= HPTE_V_SECONDARY;
- lhpte.v |= HPTE_V_SECONDARY;
- }
+ spin_lock_irqsave(&ps3_htab_lock, flags);
- result = lv1_write_htab_entry(0, slot, lhpte.v, lhpte.r);
+ /* talk hvc to replace entries BOLTED == 0 */
+ result = lv1_insert_htab_entry(PS3_LPAR_VAS_ID_CURRENT, hpte_group,
+ hpte_v, hpte_r,
+ HPTE_V_BOLTED, 0,
+ &inserted_index,
+ &evicted_v, &evicted_r);
if (result) {
- debug_dump_hpte(pa, va, hpte_group, bitmap, lhpte, psize, slot);
+ /* all entries bolted !*/
+ pr_info("%s:result=%d va=%lx pa=%lx ix=%lx v=%lx r=%lx\n",
+ __func__, result, va, pa, hpte_group, hpte_v, hpte_r);
BUG();
}
/*
- * If used slot is not in primary HPTE group,
- * the slot should be in secondary HPTE group.
+ * see if the entry is inserted into secondary pteg
*/
+ result = lv1_read_htab_entries(PS3_LPAR_VAS_ID_CURRENT,
+ inserted_index & ~0x3UL,
+ &hpte_v_array[0], &hpte_v_array[1],
+ &hpte_v_array[2], &hpte_v_array[3],
+ &hpte_rs);
+ BUG_ON(result);
- if ((hpte_group ^ slot) & ~(HPTES_PER_GROUP - 1)) {
- secondary = 1;
- b_index = s_pteg;
- } else {
- secondary = 0;
- b_index = p_pteg;
- }
+ if (hpte_v_array[inserted_index % 4] & HPTE_V_SECONDARY)
+ ret = (inserted_index & 7) | (1 << 3);
+ else
+ ret = inserted_index & 7;
- b_mask = (lhpte.v & HPTE_V_BOLTED) ? 1 << 7 : 0 << 7;
- bolttab[b_index] |= b_mask >> (slot & 7);
- b_mask = 1 << 7;
- inusetab[b_index] |= b_mask >> (slot & 7);
- spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
+ spin_unlock_irqrestore(&ps3_htab_lock, flags);
- return (slot & 7) | (secondary << 3);
+ return ret;
}
static long ps3_hpte_remove(unsigned long hpte_group)
static long ps3_hpte_updatepp(unsigned long slot, unsigned long newpp,
unsigned long va, int psize, int ssize, int local)
{
+ int result;
+ u64 hpte_v, want_v, hpte_rs;
+ u64 hpte_v_array[4];
unsigned long flags;
- unsigned long result;
- unsigned long pteg, bit;
- unsigned long hpte_v, want_v;
+ long ret;
- want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
+ want_v = hpte_encode_v(va, psize, ssize);
- spin_lock_irqsave(&ps3_bolttab_lock, flags);
+ spin_lock_irqsave(&ps3_htab_lock, flags);
- hpte_v = htab[slot].v;
- if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) {
- spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
-
- /* ps3_hpte_insert() will be used to update PTE */
- return -1;
- }
-
- result = lv1_write_htab_entry(0, slot, 0, 0);
+ result = lv1_read_htab_entries(PS3_LPAR_VAS_ID_CURRENT, slot & ~0x3UL,
+ &hpte_v_array[0], &hpte_v_array[1],
+ &hpte_v_array[2], &hpte_v_array[3],
+ &hpte_rs);
if (result) {
- DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
- __func__, va, slot, psize, result, result);
+ pr_info("%s: res=%d read va=%lx slot=%lx psize=%d\n",
+ __func__, result, va, slot, psize);
BUG();
}
- pteg = slot / HPTES_PER_GROUP;
- bit = slot % HPTES_PER_GROUP;
- inusetab[pteg] &= ~(0x80 >> bit);
+ hpte_v = hpte_v_array[slot % 4];
- spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
+ /*
+ * As lv1_read_htab_entries() does not give us the RPN, we can
+ * not synthesize the new hpte_r value here, and therefore can
+ * not update the hpte with lv1_insert_htab_entry(), so we
+ * insted invalidate it and ask the caller to update it via
+ * ps3_hpte_insert() by returning a -1 value.
+ */
+ if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) {
+ /* not found */
+ ret = -1;
+ } else {
+ /* entry found, just invalidate it */
+ result = lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT,
+ slot, 0, 0);
+ ret = -1;
+ }
- /* ps3_hpte_insert() will be used to update PTE */
- return -1;
+ spin_unlock_irqrestore(&ps3_htab_lock, flags);
+ return ret;
}
static void ps3_hpte_updateboltedpp(unsigned long newpp, unsigned long ea,
int psize, int ssize, int local)
{
unsigned long flags;
- unsigned long result;
- unsigned long pteg, bit;
+ int result;
+
+ spin_lock_irqsave(&ps3_htab_lock, flags);
- spin_lock_irqsave(&ps3_bolttab_lock, flags);
- result = lv1_write_htab_entry(0, slot, 0, 0);
+ result = lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT, slot, 0, 0);
if (result) {
- DBG("%s: va=%lx slot=%lx psize=%d result = %ld (0x%lx)\n",
- __func__, va, slot, psize, result, result);
+ pr_info("%s: res=%d va=%lx slot=%lx psize=%d\n",
+ __func__, result, va, slot, psize);
BUG();
}
- pteg = slot / HPTES_PER_GROUP;
- bit = slot % HPTES_PER_GROUP;
- inusetab[pteg] &= ~(0x80 >> bit);
- spin_unlock_irqrestore(&ps3_bolttab_lock, flags);
+ spin_unlock_irqrestore(&ps3_htab_lock, flags);
}
static void ps3_hpte_clear(void)
{
- int result;
-
- DBG(" -> %s:%d\n", __func__, __LINE__);
+ unsigned long hpte_count = (1UL << ppc64_pft_size) >> 4;
+ u64 i;
- result = lv1_unmap_htab(htab_addr);
- BUG_ON(result);
+ for (i = 0; i < hpte_count; i++)
+ lv1_write_htab_entry(PS3_LPAR_VAS_ID_CURRENT, i, 0, 0);
ps3_mm_shutdown();
ps3_mm_vas_destroy();
-
- DBG(" <- %s:%d\n", __func__, __LINE__);
}
void __init ps3_hpte_init(unsigned long htab_size)
{
- long bitmap_size;
-
- DBG(" -> %s:%d\n", __func__, __LINE__);
-
ppc_md.hpte_invalidate = ps3_hpte_invalidate;
ppc_md.hpte_updatepp = ps3_hpte_updatepp;
ppc_md.hpte_updateboltedpp = ps3_hpte_updateboltedpp;
ppc_md.hpte_clear_all = ps3_hpte_clear;
ppc64_pft_size = __ilog2(htab_size);
-
- bitmap_size = htab_size / sizeof(struct hash_pte) / 8;
-
- bolttab = __va(lmb_alloc(bitmap_size, 1));
- inusetab = __va(lmb_alloc(bitmap_size, 1));
-
- memset(bolttab, 0, bitmap_size);
- memset(inusetab, 0, bitmap_size);
-
- DBG(" <- %s:%d\n", __func__, __LINE__);
}
-void __init ps3_map_htab(void)
-{
- long result;
- unsigned long htab_size = (1UL << ppc64_pft_size);
-
- result = lv1_map_htab(0, &htab_addr);
-
- htab = (__force struct hash_pte *)ioremap_flags(htab_addr, htab_size,
- pgprot_val(PAGE_READONLY_X));
-
- DBG("%s:%d: lpar %016lxh, virt %016lxh\n", __func__, __LINE__,
- htab_addr, (unsigned long)htab);
-}
projects / linux-2.6 / commitdiff