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test vaddr_write_cross_page #557

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test vaddr_write_cross_page #557

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24 changes: 23 additions & 1 deletion src/memory/vaddr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -32,9 +32,12 @@
#ifndef ENABLE_HOSTTLB

static paddr_t vaddr_trans_and_check_exception(vaddr_t vaddr, int len, int type, bool* exp) {
Log("vaddr_trans_and_check_exception!");
paddr_t mmu_ret = isa_mmu_translate(vaddr & ~PAGE_MASK, len, type);
Log("mmu_ret = 0x%lx", mmu_ret);
*exp = (mmu_ret & PAGE_MASK) != MEM_RET_OK;
paddr_t paddr = (mmu_ret & ~PAGE_MASK) | (vaddr & PAGE_MASK);
Log("paddr = 0x%lx", paddr);
if (*exp) {
return 0;
}
Expand Down Expand Up @@ -78,26 +81,43 @@ static void vaddr_write_cross_page(vaddr_t addr, int len, word_t data) {
// +---+---+---+---+---+---+---+---+---+---+---+---+

vaddr_t cur_pg_st_vaddr = addr;
Log("cur_pg_st_vaddr = 0x%lx", cur_pg_st_vaddr);
vaddr_t next_pg_st_vaddr = (addr & ~PAGE_MASK) + PAGE_SIZE;
Log("next_pg_st_vaddr = 0x%lx", next_pg_st_vaddr);
int cur_pg_st_len = next_pg_st_vaddr - cur_pg_st_vaddr;
Log("cur_pg_st_len = %d", cur_pg_st_len);
int next_pg_st_len = len - cur_pg_st_len;
Log("next_pg_st_len = %d", next_pg_st_len);
word_t cur_pg_st_mask = 0;
int i = 0;
for (; i < cur_pg_st_len; i++) {
cur_pg_st_mask = (cur_pg_st_mask << 8) | 0xffUL;
Log("cur_pg_st_mask = 0x%ld", cur_pg_st_mask);
}
Log("vaddr_write_cross_page check 1...");
word_t cur_pg_st_data = data & cur_pg_st_mask;
Log("cur_pg_st_data = 0x%ld", cur_pg_st_data);
word_t next_pg_st_data = data >> (cur_pg_st_len << 3);
Log("next_pg_st_data = 0x%ld", next_pg_st_data);
// make sure no page fault or access fault before real write
bool cur_pg_st_exp = false;
bool next_pg_st_exp = false;
Log("vaddr_write_cross_page check 2...");
paddr_t cur_pg_st_paddr = vaddr_trans_and_check_exception(cur_pg_st_vaddr, cur_pg_st_len, MEM_TYPE_WRITE, &cur_pg_st_exp);
Log("cur_pg_st_paddr = 0x%ld", cur_pg_st_paddr);
Log("vaddr_write_cross_page check 3...");
paddr_t next_pg_st_paddr = vaddr_trans_and_check_exception(next_pg_st_vaddr, next_pg_st_len, MEM_TYPE_WRITE, &next_pg_st_exp);

Log("next_pg_st_paddr = 0x%ld", next_pg_st_paddr);
Log("vaddr_write_cross_page check 4...");

if (!cur_pg_st_exp && !next_pg_st_exp) {
Log("vaddr_write_cross_page check 5...");
paddr_write(cur_pg_st_paddr, cur_pg_st_len, cur_pg_st_data, cpu.mode | CROSS_PAGE_ST_FLAG, cur_pg_st_vaddr);
Log("vaddr_write_cross_page check 6...");
paddr_write(next_pg_st_paddr, next_pg_st_len, next_pg_st_data, cpu.mode | CROSS_PAGE_ST_FLAG, next_pg_st_vaddr);
Log("vaddr_write_cross_page check 7...");
}
Log("vaddr_write_cross_page check 8...");
}

__attribute__((noinline))
Expand Down Expand Up @@ -140,7 +160,9 @@ static void vaddr_mmu_write(struct Decode *s, vaddr_t addr, int len, word_t data
#endif
paddr_write(addr, len, data, cpu.mode, vaddr);
} else if (len != 1 && ret == MEM_RET_CROSS_PAGE) {
Log("Before vaddr_write_cross_page...");
vaddr_write_cross_page(addr, len, data);
Log("After vaddr_write_cross_page...");
}
}
#endif
Expand Down