ARM: zynqmp: Add platform specific arch_get_page_table

[oweals/u-boot.git] / arch / arm / cpu / armv8 / cache_v8.c

diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
index 9dbcdf22afe266e35eb40804b267f51c5f2c8e65..835f6a6525ea08e8c3a1473d78fa7dbf1428c681 100644 (file)
--- a/arch/arm/cpu/armv8/cache_v8.c
+++ b/arch/arm/cpu/armv8/cache_v8.c
@@ -25,9 +25,9 @@ void set_pgtable_section(u64 *page_table, u64 index, u64 section,
 /* to activate the MMU we need to set up virtual memory */
 static void mmu_setup(void)
 {
-       int i, j, el;
        bd_t *bd = gd->bd;
-       u64 *page_table = (u64 *)gd->arch.tlb_addr;
+       u64 *page_table = (u64 *)gd->arch.tlb_addr, i, j;
+       int el;
 
        /* Setup an identity-mapping for all spaces */
        for (i = 0; i < (PGTABLE_SIZE >> 3); i++) {
@@ -73,17 +73,21 @@ void invalidate_dcache_all(void)
        __asm_invalidate_dcache_all();
 }
 
-void __weak flush_l3_cache(void)
-{
-}
-
 /*
- * Performs a clean & invalidation of the entire data cache at all levels
+ * Performs a clean & invalidation of the entire data cache at all levels.
+ * This function needs to be inline to avoid using stack.
+ * __asm_flush_l3_cache return status of timeout
  */
-void flush_dcache_all(void)
+inline void flush_dcache_all(void)
 {
+       int ret;
+
        __asm_flush_dcache_all();
-       flush_l3_cache();
+       ret = __asm_flush_l3_cache();
+       if (ret)
+               debug("flushing dcache returns 0x%x\n", ret);
+       else
+               debug("flushing dcache successfully.\n");
 }
 
 /*
@@ -135,21 +139,44 @@ int dcache_status(void)
        return (get_sctlr() & CR_C) != 0;
 }
 
-#else  /* CONFIG_SYS_DCACHE_OFF */
+u64 *__weak arch_get_page_table(void) {
+       puts("No page table offset defined\n");
 
-void invalidate_dcache_all(void)
-{
+       return NULL;
 }
 
-void flush_dcache_all(void)
+void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size,
+                                    enum dcache_option option)
 {
+       u64 *page_table = arch_get_page_table();
+       u64 upto, end;
+
+       if (page_table == NULL)
+               return;
+
+       end = ALIGN(start + size, (1 << MMU_SECTION_SHIFT)) >>
+             MMU_SECTION_SHIFT;
+       start = start >> MMU_SECTION_SHIFT;
+       for (upto = start; upto < end; upto++) {
+               page_table[upto] &= ~PMD_ATTRINDX_MASK;
+               page_table[upto] |= PMD_ATTRINDX(option);
+       }
+       asm volatile("dsb sy");
+       __asm_invalidate_tlb_all();
+       asm volatile("dsb sy");
+       asm volatile("isb");
+       start = start << MMU_SECTION_SHIFT;
+       end = end << MMU_SECTION_SHIFT;
+       flush_dcache_range(start, end);
+       asm volatile("dsb sy");
 }
+#else  /* CONFIG_SYS_DCACHE_OFF */
 
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
+void invalidate_dcache_all(void)
 {
 }
 
-void flush_dcache_range(unsigned long start, unsigned long stop)
+void flush_dcache_all(void)
 {
 }
 
@@ -166,6 +193,11 @@ int dcache_status(void)
        return 0;
 }
 
+void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size,
+                                    enum dcache_option option)
+{
+}
+
 #endif /* CONFIG_SYS_DCACHE_OFF */
 
 #ifndef CONFIG_SYS_ICACHE_OFF
@@ -221,11 +253,3 @@ void __weak enable_caches(void)
        icache_enable();
        dcache_enable();
 }
-
-/*
- * Flush range from all levels of d-cache/unified-cache
- */
-void flush_cache(unsigned long start, unsigned long size)
-{
-       flush_dcache_range(start, start + size);
-}