powerpc/mm/hash: Update SDR1 size encoding as documented in ISA 3.0

ISA 3.0 document hash table size in bytes = 2^(HTABSIZE + 18)

No functionality change by this patch.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 4f0fd47..7d0955e 100644 (file)
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -714,10 +714,9 @@ int remove_section_mapping(unsigned long start, unsigned long end)
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 static void __init hash_init_partition_table(phys_addr_t hash_table,
-                                            unsigned long pteg_count)
+                                            unsigned long htab_size)
 {
        unsigned long ps_field;
-       unsigned long htab_size;
        unsigned long patb_size = 1UL << PATB_SIZE_SHIFT;
 
        /*
@@ -725,7 +724,7 @@ static void __init hash_init_partition_table(phys_addr_t hash_table,
         * We can ignore that for lpid 0
         */
        ps_field = 0;
-       htab_size =  __ilog2(pteg_count) - 11;
+       htab_size =  __ilog2(htab_size) - 18;
 
        BUILD_BUG_ON_MSG((PATB_SIZE_SHIFT > 24), "Partition table size too large.");
        partition_tb = __va(memblock_alloc_base(patb_size, patb_size,
@@ -811,7 +810,7 @@ static void __init htab_initialize(void)
                htab_address = __va(table);
 
                /* htab absolute addr + encoded htabsize */
-               _SDR1 = table + __ilog2(pteg_count) - 11;
+               _SDR1 = table + __ilog2(htab_size_bytes) - 18;
 
                /* Initialize the HPT with no entries */
                memset((void *)table, 0, htab_size_bytes);
@@ -820,7 +819,7 @@ static void __init htab_initialize(void)
                        /* Set SDR1 */
                        mtspr(SPRN_SDR1, _SDR1);
                else
-                       hash_init_partition_table(table, pteg_count);
+                       hash_init_partition_table(table, htab_size_bytes);
        }
 
        prot = pgprot_val(PAGE_KERNEL);