On Thursday, August 13, 2015 at 06:51:22 PM, Sergey Temerkhanov wrote:
This patch adds code which sets up 2-level page tables on ARM64 thus extending available VA space. CPUs implementing 64k translation granule are able to use direct PA-VA mapping of the whole 48 bit address space. It also adds the ability to reset the SCTRL register at the very beginning of execution to avoid interference from stale mappings set up by early firmware/loaders/etc.
Signed-off-by: Sergey Temerkhanov s.temerkhanov@gmail.com Signed-off-by: Radha Mohan Chintakuntla rchintakuntla@cavium.com
Hi!
[...]
+static void setup_pgtables(void) +{
- int l1_e, l2_e;
- unsigned long pmd = 0;
- unsigned long address;
- /* Setup the PMD pointers */
- for (l1_e = 0; l1_e < CONFIG_SYS_MEM_MAP_SIZE; l1_e++) {
gd->arch.pmd_addr[l1_e] = gd->arch.tlb_addr +PTL1_ENTRIES * sizeof(u64);gd->arch.pmd_addr[l1_e] += PTL2_ENTRIES * sizeof(u64) * l1_e;gd->arch.pmd_addr[l1_e] += 0xffffUL;gd->arch.pmd_addr[l1_e] &= ~0xffffUL;
Is this an attempt for roundup() ? See include/linux/kernel.h for that macro. Maybe you can even use round_up(), bit that has some limitations, so be careful.
- }
- /* Setup the page tables */
- for (l1_e = 0; l1_e < PTL1_ENTRIES; l1_e++) {
if (mem_map[pmd].base ==(uintptr_t)l1_e << PTL2_BITS) {set_ptl1_entry(l1_e, gd->arch.pmd_addr[pmd]);for (l2_e = 0; l2_e < PTL2_ENTRIES; l2_e++) {address = mem_map[pmd].base+ (uintptr_t)l2_e * BLOCK_SIZE;set_ptl2_block(gd->arch.pmd_addr[pmd], l2_e,address, mem_map[pmd].attrs);}pmd++;} else {set_ptl1_entry(l1_e, 0);}- }
+}
+#else
void set_pgtable_section(u64 *page_table, u64 index, u64 section, u64 memory_type) {
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