diff options
Diffstat (limited to 'payloads/libpayload/arch/arm64/mmu.c')
| -rw-r--r-- | payloads/libpayload/arch/arm64/mmu.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/payloads/libpayload/arch/arm64/mmu.c b/payloads/libpayload/arch/arm64/mmu.c index 204412efd5..f0781f5ec1 100644 --- a/payloads/libpayload/arch/arm64/mmu.c +++ b/payloads/libpayload/arch/arm64/mmu.c @@ -200,12 +200,24 @@ static uint64_t init_xlat_table(uint64_t base_addr, /* * L1 table lookup - * If VA has bits more than 41, lookup starts at L1 + * If VA has bits more than L2 can resolve, lookup starts at L1 + * Assumption: we don't need L0 table in coreboot */ - if (l1_index) { - table = get_next_level_table(&table[l1_index]); - if (!table) - return 0; + if (BITS_PER_VA > L1_ADDR_SHIFT) { + if ((size >= L1_XLAT_SIZE) && + IS_ALIGNED(base_addr, (1UL << L1_ADDR_SHIFT))) { + /* If block address is aligned and size is greater than + * or equal to size addressed by each L1 entry, we can + * directly store a block desc */ + desc = base_addr | BLOCK_DESC | attr; + table[l1_index] = desc; + /* L2 lookup is not required */ + return L1_XLAT_SIZE; + } else { + table = get_next_level_table(&table[l1_index]); + if (!table) + return 0; + } } /* @@ -213,10 +225,11 @@ static uint64_t init_xlat_table(uint64_t base_addr, * If lookup was performed at L1, L2 table addr is obtained from L1 desc * else, lookup starts at ttbr address */ - if (!l3_index && (size >= L2_XLAT_SIZE)) { + if ((size >= L2_XLAT_SIZE) && + IS_ALIGNED(base_addr, (1UL << L2_ADDR_SHIFT))) { /* * If block address is aligned and size is greater than or equal - * to 512MiB i.e. size addressed by each L2 entry, we can + * to size addressed by each L2 entry, we can * directly store a block desc */ desc = base_addr | BLOCK_DESC | attr; @@ -369,7 +382,7 @@ void mmu_enable(void) /* Initialize TCR flags */ raw_write_tcr_current(TCR_TOSZ | TCR_IRGN0_NM_WBWAC | TCR_ORGN0_NM_WBWAC | - TCR_SH0_IS | TCR_TG0_64KB | TCR_PS_64GB | + TCR_SH0_IS | TCR_TG0_4KB | TCR_PS_64GB | TCR_TBI_USED); /* Initialize TTBR */ |