1 files changed, 151 insertions, 37 deletions

diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index badcf5e8d695..0de0e4127d66 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -29,8 +29,7 @@
 
 #include <asm/mmu_context.h>
 #include <asm/war.h>
-
-#include "uasm.h"
+#include <asm/uasm.h>
 
 static inline int r45k_bvahwbug(void)
 {
@@ -77,6 +76,8 @@ enum label_id {
         label_vmalloc_done,
         label_tlbw_hazard,
         label_split,
+        label_tlbl_goaround1,
+        label_tlbl_goaround2,
         label_nopage_tlbl,
         label_nopage_tlbs,
         label_nopage_tlbm,
@@ -93,6 +94,8 @@ UASM_L_LA(_vmalloc)
 UASM_L_LA(_vmalloc_done)
 UASM_L_LA(_tlbw_hazard)
 UASM_L_LA(_split)
+UASM_L_LA(_tlbl_goaround1)
+UASM_L_LA(_tlbl_goaround2)
 UASM_L_LA(_nopage_tlbl)
 UASM_L_LA(_nopage_tlbs)
 UASM_L_LA(_nopage_tlbm)
@@ -397,36 +400,60 @@ static void __cpuinit build_tlb_write_entry(u32 **p, struct uasm_label **l,
         }
 }
 
-#ifdef CONFIG_HUGETLB_PAGE
-static __cpuinit void build_huge_tlb_write_entry(u32 **p,
-                                                 struct uasm_label **l,
-                                                 struct uasm_reloc **r,
-                                                 unsigned int tmp,
-                                                 enum tlb_write_entry wmode)
+static __cpuinit __maybe_unused void build_convert_pte_to_entrylo(u32 **p,
+                                                                  unsigned int reg)
 {
-        /* Set huge page tlb entry size */
-        uasm_i_lui(p, tmp, PM_HUGE_MASK >> 16);
-        uasm_i_ori(p, tmp, tmp, PM_HUGE_MASK & 0xffff);
-        uasm_i_mtc0(p, tmp, C0_PAGEMASK);
+        if (kernel_uses_smartmips_rixi) {
+                UASM_i_SRL(p, reg, reg, ilog2(_PAGE_NO_EXEC));
+                UASM_i_ROTR(p, reg, reg, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC));
+        } else {
+#ifdef CONFIG_64BIT_PHYS_ADDR
+                uasm_i_dsrl(p, reg, reg, ilog2(_PAGE_GLOBAL));
+#else
+                UASM_i_SRL(p, reg, reg, ilog2(_PAGE_GLOBAL));
+#endif
+        }
+}
 
-        build_tlb_write_entry(p, l, r, wmode);
+#ifdef CONFIG_HUGETLB_PAGE
 
+static __cpuinit void build_restore_pagemask(u32 **p,
+                                             struct uasm_reloc **r,
+                                             unsigned int tmp,
+                                             enum label_id lid)
+{
         /* Reset default page size */
         if (PM_DEFAULT_MASK >> 16) {
                 uasm_i_lui(p, tmp, PM_DEFAULT_MASK >> 16);
                 uasm_i_ori(p, tmp, tmp, PM_DEFAULT_MASK & 0xffff);
-                uasm_il_b(p, r, label_leave);
+                uasm_il_b(p, r, lid);
                 uasm_i_mtc0(p, tmp, C0_PAGEMASK);
         } else if (PM_DEFAULT_MASK) {
                 uasm_i_ori(p, tmp, 0, PM_DEFAULT_MASK);
-                uasm_il_b(p, r, label_leave);
+                uasm_il_b(p, r, lid);
                 uasm_i_mtc0(p, tmp, C0_PAGEMASK);
         } else {
-                uasm_il_b(p, r, label_leave);
+                uasm_il_b(p, r, lid);
                 uasm_i_mtc0(p, 0, C0_PAGEMASK);
         }
 }
 
+static __cpuinit void build_huge_tlb_write_entry(u32 **p,
+                                                 struct uasm_label **l,
+                                                 struct uasm_reloc **r,
+                                                 unsigned int tmp,
+                                                 enum tlb_write_entry wmode)
+{
+        /* Set huge page tlb entry size */
+        uasm_i_lui(p, tmp, PM_HUGE_MASK >> 16);
+        uasm_i_ori(p, tmp, tmp, PM_HUGE_MASK & 0xffff);
+        uasm_i_mtc0(p, tmp, C0_PAGEMASK);
+
+        build_tlb_write_entry(p, l, r, wmode);
+
+        build_restore_pagemask(p, r, tmp, label_leave);
+}
+
 /*
  * Check if Huge PTE is present, if so then jump to LABEL.
  */
@@ -460,15 +487,15 @@ static __cpuinit void build_huge_update_entries(u32 **p,
         if (!small_sequence)
                 uasm_i_lui(p, tmp, HPAGE_SIZE >> (7 + 16));
 
-        UASM_i_SRL(p, pte, pte, 6); /* convert to entrylo */
-        uasm_i_mtc0(p, pte, C0_ENTRYLO0); /* load it */
+        build_convert_pte_to_entrylo(p, pte);
+        UASM_i_MTC0(p, pte, C0_ENTRYLO0); /* load it */
         /* convert to entrylo1 */
         if (small_sequence)
                 UASM_i_ADDIU(p, pte, pte, HPAGE_SIZE >> 7);
         else
                 UASM_i_ADDU(p, pte, pte, tmp);
 
-        uasm_i_mtc0(p, pte, C0_ENTRYLO1); /* load it */
+        UASM_i_MTC0(p, pte, C0_ENTRYLO1); /* load it */
 }
 
 static __cpuinit void build_huge_handler_tail(u32 **p,
@@ -549,11 +576,13 @@ build_get_pmde64(u32 **p, struct uasm_label **l, struct uasm_reloc **r,
 
         uasm_i_andi(p, tmp, tmp, (PTRS_PER_PGD - 1)<<3);
         uasm_i_daddu(p, ptr, ptr, tmp); /* add in pgd offset */
+#ifndef __PAGETABLE_PMD_FOLDED
         uasm_i_dmfc0(p, tmp, C0_BADVADDR); /* get faulting address */
         uasm_i_ld(p, ptr, 0, ptr); /* get pmd pointer */
         uasm_i_dsrl(p, tmp, tmp, PMD_SHIFT-3); /* get pmd offset in bytes */
         uasm_i_andi(p, tmp, tmp, (PTRS_PER_PMD - 1)<<3);
         uasm_i_daddu(p, ptr, ptr, tmp); /* add in pmd offset */
+#endif
 }
 
 /*
@@ -684,35 +713,53 @@ static void __cpuinit build_update_entries(u32 **p, unsigned int tmp,
         if (cpu_has_64bits) {
                 uasm_i_ld(p, tmp, 0, ptep); /* get even pte */
                 uasm_i_ld(p, ptep, sizeof(pte_t), ptep); /* get odd pte */
-                uasm_i_dsrl(p, tmp, tmp, 6); /* convert to entrylo0 */
-                uasm_i_mtc0(p, tmp, C0_ENTRYLO0); /* load it */
-                uasm_i_dsrl(p, ptep, ptep, 6); /* convert to entrylo1 */
-                uasm_i_mtc0(p, ptep, C0_ENTRYLO1); /* load it */
+                if (kernel_uses_smartmips_rixi) {
+                        UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_NO_EXEC));
+                        UASM_i_SRL(p, ptep, ptep, ilog2(_PAGE_NO_EXEC));
+                        UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC));
+                        UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */
+                        UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC));
+                } else {
+                        uasm_i_dsrl(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); /* convert to entrylo0 */
+                        UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */
+                        uasm_i_dsrl(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); /* convert to entrylo1 */
+                }
+                UASM_i_MTC0(p, ptep, C0_ENTRYLO1); /* load it */
         } else {
                 int pte_off_even = sizeof(pte_t) / 2;
                 int pte_off_odd = pte_off_even + sizeof(pte_t);
 
                 /* The pte entries are pre-shifted */
                 uasm_i_lw(p, tmp, pte_off_even, ptep); /* get even pte */
-                uasm_i_mtc0(p, tmp, C0_ENTRYLO0); /* load it */
+                UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */
                 uasm_i_lw(p, ptep, pte_off_odd, ptep); /* get odd pte */
-                uasm_i_mtc0(p, ptep, C0_ENTRYLO1); /* load it */
+                UASM_i_MTC0(p, ptep, C0_ENTRYLO1); /* load it */
         }
 #else
         UASM_i_LW(p, tmp, 0, ptep); /* get even pte */
         UASM_i_LW(p, ptep, sizeof(pte_t), ptep); /* get odd pte */
         if (r45k_bvahwbug())
                 build_tlb_probe_entry(p);
-        UASM_i_SRL(p, tmp, tmp, 6); /* convert to entrylo0 */
-        if (r4k_250MHZhwbug())
-                uasm_i_mtc0(p, 0, C0_ENTRYLO0);
-        uasm_i_mtc0(p, tmp, C0_ENTRYLO0); /* load it */
-        UASM_i_SRL(p, ptep, ptep, 6); /* convert to entrylo1 */
-        if (r45k_bvahwbug())
-                uasm_i_mfc0(p, tmp, C0_INDEX);
+        if (kernel_uses_smartmips_rixi) {
+                UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_NO_EXEC));
+                UASM_i_SRL(p, ptep, ptep, ilog2(_PAGE_NO_EXEC));
+                UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC));
+                if (r4k_250MHZhwbug())
+                        UASM_i_MTC0(p, 0, C0_ENTRYLO0);
+                UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */
+                UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL) - ilog2(_PAGE_NO_EXEC));
+        } else {
+                UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); /* convert to entrylo0 */
+                if (r4k_250MHZhwbug())
+                        UASM_i_MTC0(p, 0, C0_ENTRYLO0);
+                UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */
+                UASM_i_SRL(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); /* convert to entrylo1 */
+                if (r45k_bvahwbug())
+                        uasm_i_mfc0(p, tmp, C0_INDEX);
+        }
         if (r4k_250MHZhwbug())
-                uasm_i_mtc0(p, 0, C0_ENTRYLO1);
-        uasm_i_mtc0(p, ptep, C0_ENTRYLO1); /* load it */
+                UASM_i_MTC0(p, 0, C0_ENTRYLO1);
+        UASM_i_MTC0(p, ptep, C0_ENTRYLO1); /* load it */
 #endif
 }
 
@@ -985,9 +1032,14 @@ static void __cpuinit
 build_pte_present(u32 **p, struct uasm_reloc **r,
                   unsigned int pte, unsigned int ptr, enum label_id lid)
 {
-        uasm_i_andi(p, pte, pte, _PAGE_PRESENT | _PAGE_READ);
-        uasm_i_xori(p, pte, pte, _PAGE_PRESENT | _PAGE_READ);
-        uasm_il_bnez(p, r, pte, lid);
+        if (kernel_uses_smartmips_rixi) {
+                uasm_i_andi(p, pte, pte, _PAGE_PRESENT);
+                uasm_il_beqz(p, r, pte, lid);
+        } else {
+                uasm_i_andi(p, pte, pte, _PAGE_PRESENT | _PAGE_READ);
+                uasm_i_xori(p, pte, pte, _PAGE_PRESENT | _PAGE_READ);
+                uasm_il_bnez(p, r, pte, lid);
+        }
         iPTE_LW(p, pte, ptr);
 }
 
@@ -1272,6 +1324,34 @@ static void __cpuinit build_r4000_tlb_load_handler(void)
         build_pte_present(&p, &r, K0, K1, label_nopage_tlbl);
         if (m4kc_tlbp_war())
                 build_tlb_probe_entry(&p);
+
+        if (kernel_uses_smartmips_rixi) {
+                /*
+                 * If the page is not _PAGE_VALID, RI or XI could not
+                 * have triggered it.  Skip the expensive test..
+                 */
+                uasm_i_andi(&p, K0, K0, _PAGE_VALID);
+                uasm_il_beqz(&p, &r, K0, label_tlbl_goaround1);
+                uasm_i_nop(&p);
+
+                uasm_i_tlbr(&p);
+                /* Examine  entrylo 0 or 1 based on ptr. */
+                uasm_i_andi(&p, K0, K1, sizeof(pte_t));
+                uasm_i_beqz(&p, K0, 8);
+
+                UASM_i_MFC0(&p, K0, C0_ENTRYLO0); /* load it in the delay slot*/
+                UASM_i_MFC0(&p, K0, C0_ENTRYLO1); /* load it if ptr is odd */
+                /*
+                 * If the entryLo (now in K0) is valid (bit 1), RI or
+                 * XI must have triggered it.
+                 */
+                uasm_i_andi(&p, K0, K0, 2);
+                uasm_il_bnez(&p, &r, K0, label_nopage_tlbl);
+
+                uasm_l_tlbl_goaround1(&l, p);
+                /* Reload the PTE value */
+                iPTE_LW(&p, K0, K1);
+        }
         build_make_valid(&p, &r, K0, K1);
         build_r4000_tlbchange_handler_tail(&p, &l, &r, K0, K1);
 
@@ -1284,6 +1364,40 @@ static void __cpuinit build_r4000_tlb_load_handler(void)
         iPTE_LW(&p, K0, K1);
         build_pte_present(&p, &r, K0, K1, label_nopage_tlbl);
         build_tlb_probe_entry(&p);
+
+        if (kernel_uses_smartmips_rixi) {
+                /*
+                 * If the page is not _PAGE_VALID, RI or XI could not
+                 * have triggered it.  Skip the expensive test..
+                 */
+                uasm_i_andi(&p, K0, K0, _PAGE_VALID);
+                uasm_il_beqz(&p, &r, K0, label_tlbl_goaround2);
+                uasm_i_nop(&p);
+
+                uasm_i_tlbr(&p);
+                /* Examine  entrylo 0 or 1 based on ptr. */
+                uasm_i_andi(&p, K0, K1, sizeof(pte_t));
+                uasm_i_beqz(&p, K0, 8);
+
+                UASM_i_MFC0(&p, K0, C0_ENTRYLO0); /* load it in the delay slot*/
+                UASM_i_MFC0(&p, K0, C0_ENTRYLO1); /* load it if ptr is odd */
+                /*
+                 * If the entryLo (now in K0) is valid (bit 1), RI or
+                 * XI must have triggered it.
+                 */
+                uasm_i_andi(&p, K0, K0, 2);
+                uasm_il_beqz(&p, &r, K0, label_tlbl_goaround2);
+                /* Reload the PTE value */
+                iPTE_LW(&p, K0, K1);
+
+                /*
+                 * We clobbered C0_PAGEMASK, restore it.  On the other branch
+                 * it is restored in build_huge_tlb_write_entry.
+                 */
+                build_restore_pagemask(&p, &r, K0, label_nopage_tlbl);
+
+                uasm_l_tlbl_goaround2(&l, p);
+        }
         uasm_i_ori(&p, K0, K0, (_PAGE_ACCESSED | _PAGE_VALID));
         build_huge_handler_tail(&p, &r, &l, K0, K1);
 #endif