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Line 48... Line 48...
48 
#include <arch/trap/trap.h>
 48 
#include <arch/trap/trap.h>
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#include <panic.h>
 49 
#include <panic.h>
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#include <arch/asm.h>
 50 
#include <arch/asm.h>
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#include <symtab.h>
 51 
#include <symtab.h>
52 
 
 52 
 
- 
 
 53 
static void dtlb_pte_copy(pte_t *t, bool ro);
53 
static void dtlb_pte_copy(pte_t *t);
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static void itlb_pte_copy(pte_t *t);
54 
static void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str);
 55 
static void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str);
- 
 
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static void do_fast_instruction_access_mmu_miss_fault(istate_t *istate, const char *str);
55 
 
 57 
 
56 
char *context_encoding[] = {
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char *context_encoding[] = {
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    "Primary",
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    "Primary",
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    "Secondary",
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    "Secondary",
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    "Nucleus",
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    "Nucleus",
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    data.g = true;
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    data.g = true;
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 106 
 
105 
    dtlb_data_in_write(data.value);
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    dtlb_data_in_write(data.value);
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}
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}
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 109 
 
- 
 
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/** Copy PTE to TLB.
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 111 
 *
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 * @param t Page Table Entry to be copied.
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 113 
 * @param ro If true, the entry will be created read-only, regardless of its w field.
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 114 
 */
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void dtlb_pte_copy(pte_t *t)
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void dtlb_pte_copy(pte_t *t, bool ro)
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{
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{
- 
 
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    tlb_tag_access_reg_t tag;
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    tlb_data_t data;
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    page_address_t pg;
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    frame_address_t fr;
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    pg.address = t->page;
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    fr.address = t->frame;
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- 
 
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    tag.value = 0;
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    tag.context = t->as->asid;
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    tag.vpn = pg.vpn;
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 128 
   
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    dtlb_tag_access_write(tag.value);
- 
 
 130 
   
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    data.value = 0;
- 
 
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    data.v = true;
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    data.size = PAGESIZE_8K;
- 
 
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    data.pfn = fr.pfn;
- 
 
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    data.l = false;
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    data.cp = t->c;
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    data.cv = t->c;
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    data.p = t->p;
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    data.w = ro ? false : t->w;
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    data.g = t->g;
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 141 
   
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 142 
    dtlb_data_in_write(data.value);
- 
 
 143 
}
- 
 
 144 
 
- 
 
 145 
void itlb_pte_copy(pte_t *t)
- 
 
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{
- 
 
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    tlb_tag_access_reg_t tag;
- 
 
 148 
    tlb_data_t data;
- 
 
 149 
    page_address_t pg;
- 
 
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    frame_address_t fr;
- 
 
 151 
 
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    pg.address = t->page;
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    fr.address = t->frame;
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    tag.value = 0;
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    tag.context = t->as->asid;
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    tag.vpn = pg.vpn;
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 159 
    itlb_tag_access_write(tag.value);
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    data.value = 0;
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    data.v = true;
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    data.size = PAGESIZE_8K;
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    data.pfn = fr.pfn;
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    data.l = false;
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    data.cp = t->c;
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    data.cv = t->c;
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    data.p = t->p;
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    data.w = false;
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    data.g = t->g;
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    itlb_data_in_write(data.value);
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}
 173 
}
111 
 
 174 
 
112 
/** ITLB miss handler. */
 175 
/** ITLB miss handler. */
113 
void fast_instruction_access_mmu_miss(int n, istate_t *istate)
 176 
void fast_instruction_access_mmu_miss(int n, istate_t *istate)
114 
{
 177 
{
- 
 
 178 
    uintptr_t va = ALIGN_DOWN(istate->tpc, PAGE_SIZE);
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 179 
    pte_t *t;
- 
 
 180 
 
- 
 
 181 
    page_table_lock(AS, true);
- 
 
 182 
    t = page_mapping_find(AS, va);
- 
 
 183 
    if (t && PTE_EXECUTABLE(t)) {
- 
 
 184 
        /*
- 
 
 185 
         * The mapping was found in the software page hash table.
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         * Insert it into ITLB.
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 187 
         */
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 188 
        t->a = true;
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 189 
        itlb_pte_copy(t);
115 
    panic("%s\n", __FUNCTION__);
 190 
        page_table_unlock(AS, true);
- 
 
 191 
    } else {
- 
 
 192 
        /*
- 
 
 193 
         * Forward the page fault to the address space page fault handler.
- 
 
 194 
         */    
- 
 
 195 
        page_table_unlock(AS, true);
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 196 
        if (as_page_fault(va, PF_ACCESS_EXEC, istate) == AS_PF_FAULT) {
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 197 
            do_fast_instruction_access_mmu_miss_fault(istate, __FUNCTION__);
- 
 
 198 
        }
- 
 
 199 
    }
116 
}
 200 
}
117 
 
 201 
 
118 
/** DTLB miss handler.
 202 
/** DTLB miss handler.
119 
 *
 203 
 *
120 
 * Note that some faults (e.g. kernel faults) were already resolved
 204 
 * Note that some faults (e.g. kernel faults) were already resolved
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142 
    if (t) {
 226 
    if (t) {
143 
        /*
 227 
        /*
144 
         * The mapping was found in the software page hash table.
 228 
         * The mapping was found in the software page hash table.
145 
         * Insert it into DTLB.
 229 
         * Insert it into DTLB.
146 
         */
 230 
         */
- 
 
 231 
        t->a = true;
147 
        dtlb_pte_copy(t);
 232 
        dtlb_pte_copy(t, true);
148 
        page_table_unlock(AS, true);
 233 
        page_table_unlock(AS, true);
149 
    } else {
 234 
    } else {
150 
        /*
 235 
        /*
151 
         * Forward the page fault to the address space page fault handler.
 236 
         * Forward the page fault to the address space page fault handler.
152 
         */    
 237 
         */    
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            i, t.vpn, t.context, d.v, d.size, d.nfo, d.ie, d.soft2, d.diag, d.pfn, d.soft, d.l, d.cp, d.cv, d.e, d.p, d.w, d.g);
 273 
            i, t.vpn, t.context, d.v, d.size, d.nfo, d.ie, d.soft2, d.diag, d.pfn, d.soft, d.l, d.cp, d.cv, d.e, d.p, d.w, d.g);
189 
    }
 274 
    }
190 
 
 275 
 
191 
}
 276 
}
192 
 
 277 
 
- 
 
 278 
void do_fast_instruction_access_mmu_miss_fault(istate_t *istate, const char *str)
- 
 
 279 
{
- 
 
 280 
    char *tpc_str = get_symtab_entry(istate->tpc);
- 
 
 281 
 
- 
 
 282 
    printf("TPC=%p, (%s)\n", istate->tpc, tpc_str);
- 
 
 283 
    panic("%s\n", str);
- 
 
 284 
}
- 
 
 285 
 
193 
void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str)
 286 
void do_fast_data_access_mmu_miss_fault(istate_t *istate, const char *str)
194 
{
 287 
{
195 
    tlb_tag_access_reg_t tag;
 288 
    tlb_tag_access_reg_t tag;
196 
    uintptr_t va;
 289 
    uintptr_t va;
197 
    char *tpc_str = get_symtab_entry(istate->tpc);
 290 
    char *tpc_str = get_symtab_entry(istate->tpc);