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 */
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 */
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#include <arch/mm/tlb.h>
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#include <arch/mm/tlb.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <mm/tlb.h>
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#include <mm/tlb.h>
- 
 
 32 
#include <mm/frame.h>
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#include <mm/page.h>
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#include <mm/page.h>
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#include <mm/as.h>
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#include <mm/as.h>
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#include <arch.h>
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#include <arch.h>
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#include <print.h>
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#include <print.h>
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#include <symtab.h>
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#include <symtab.h>
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 38 
 
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 39 
 
- 
 
 40 
static phte_t *phte;
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 41 
 
- 
 
 42 
 
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/** Initialize Page Hash Table.
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/** Initialize Page Hash Table.
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 *
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 *
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 * Setup the Page Hash Table with no entries.
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 * Setup the Page Hash Table with no entries.
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 *
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 *
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 */
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 */
44 
void tlb_arch_init(void)
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void tlb_arch_init(void)
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{
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{
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    phte_t *physical_phte = (phte_t *) PFN2ADDR(frame_alloc(PHT_ORDER, FRAME_KA | FRAME_PANIC));
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    phte =(phte_t *) PA2KA((__address) physical_phte);
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    ASSERT((__address) physical_phte % (1 << PHT_BITS) == 0);
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    memsetb((__address) phte, 1 << PHT_BITS, 0);
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    asm volatile (
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        "mtsdr1 %0\n"
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        :
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        : "r" ((__address) physical_phte)
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    );
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}
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}
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/** Try to find PTE for faulting address
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/** Try to find PTE for faulting address
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 *
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 *
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    if (s)
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    if (s)
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        symbol = s;
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        symbol = s;
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    s = get_symtab_entry(istate->lr);
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    s = get_symtab_entry(istate->lr);
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    if (s)
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    if (s)
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        sym2 = s;
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        sym2 = s;
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    panic("%X: PHT Refill Exception at %X(%s<-%s)\n", badvaddr, istate->pc, symbol, sym2);
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    panic("%p: PHT Refill Exception at %p (%s<-%s)\n", badvaddr, istate->pc, symbol, sym2);
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}
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}
108 
 
 124 
 
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 125 
 
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/** Process Data Storage Interrupt
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/** Process Instruction/Data Storage Interrupt
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 *
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 *
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 * @param data   True if Data Storage Interrupt.
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 * @param istate Interrupted register context.
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 * @param istate Interrupted register context.
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 *
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 *
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 */
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 */
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void pht_refill(istate_t *istate)
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void pht_refill(bool data, istate_t *istate)
116 
{
 133 
{
117 
    asid_t asid;
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    asid_t asid;
118 
    __address badvaddr;
 135 
    __address badvaddr;
119 
    pte_t *pte;
 136 
    pte_t *pte;
- 
 
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    __u32 page;
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    __u32 api;
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    __u32 vsid;
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    __u32 hash;
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    __u32 i;
120 
   
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- 
 
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    if (data) {
121 
    __asm__ volatile (
 144 
        asm volatile (
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        "mfdar %0\n"
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            "mfdar %0\n"
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        : "=r" (badvaddr)
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            : "=r" (badvaddr)
124 
    );
 147 
        );
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 148 
    } else
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        badvaddr = istate->pc;
125 
   
 150 
       
126 
    spinlock_lock(&AS->lock);
 151 
    spinlock_lock(&AS->lock);
127 
    asid = AS->asid;
 152 
    asid = AS->asid;
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    spinlock_unlock(&AS->lock);
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    spinlock_unlock(&AS->lock);
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 154 
   
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 156 
   
132 
    pte = find_mapping_and_check(badvaddr);
 157 
    pte = find_mapping_and_check(badvaddr);
133 
    if (!pte)
 158 
    if (!pte)
134 
        goto fail;
 159 
        goto fail;
135 
 
 160 
 
136 
    /*
 - 
 
137 
     * Record access to PTE.
 161 
    /* Record access to PTE */
138 
     */
 - 
 
139 
    pte->a = 1;
 162 
    pte->a = 1;
140 
   
 163 
   
- 
 
 164 
    page = ADDR2PFN(badvaddr);
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 165 
    api = (badvaddr >> 22) & 0x3f;
- 
 
 166 
    asm volatile (
- 
 
 167 
        "mfsrin %0, %1\n"
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 168 
        : "=r" (vsid)
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        : "r" (badvaddr >> 28)
- 
 
 170 
    );
- 
 
 171 
   
- 
 
 172 
    /* Primary hash (xor) */
- 
 
 173 
    hash = ((vsid ^ page) & 0x3ff) << 3;
- 
 
 174 
   
141 
    // FIXME: Insert entry into PHT
 175 
    /* Find invalid PTE in PTEG */
- 
 
 176 
    for (i = 0; i < 8; i++) {
- 
 
 177 
        if (!phte[hash + i].v)
- 
 
 178 
            break;
- 
 
 179 
    }
- 
 
 180 
   
- 
 
 181 
    // TODO: Check access/change bits, secondary hash
- 
 
 182 
   
- 
 
 183 
    if (i == 8)
- 
 
 184 
        i = page % 8;
- 
 
 185 
   
- 
 
 186 
    phte[hash + i].v = 1;
- 
 
 187 
    phte[hash + i].vsid = vsid;
- 
 
 188 
    phte[hash + i].h = 0;
- 
 
 189 
    phte[hash + i].api = api;
- 
 
 190 
    phte[hash + i].rpn = pte->pfn;
- 
 
 191 
    phte[hash + i].r = 0;
- 
 
 192 
    phte[hash + i].c = 0;
- 
 
 193 
    phte[hash + i].pp = 2; // FIXME
142 
 
 194 
   
143 
    page_table_unlock(AS, true);
 195 
    page_table_unlock(AS, true);
144 
    return;
 196 
    return;
145 
   
 197 
   
146 
fail:
 198 
fail: