arm64: zynqmp: Define routines for mmio write and read

[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 6c5630c0a84c5c49162e414247ea3e9a5ccf755e..adc7e1746f5ca01bea6487da069167a92f762182 100644 (file)
--- a/arch/arm/cpu/armv8/cache_v8.c
+++ b/arch/arm/cpu/armv8/cache_v8.c
@@ -446,7 +446,7 @@ inline void flush_dcache_all(void)
  */
 void invalidate_dcache_range(unsigned long start, unsigned long stop)
 {
-       __asm_flush_dcache_range(start, stop);
+       __asm_invalidate_dcache_range(start, stop);
 }
 
 /*
@@ -501,7 +501,8 @@ static bool is_aligned(u64 addr, u64 size, u64 align)
        return !(addr & (align - 1)) && !(size & (align - 1));
 }
 
-static u64 set_one_region(u64 start, u64 size, u64 attrs, int level)
+/* Use flag to indicate if attrs has more than d-cache attributes */
+static u64 set_one_region(u64 start, u64 size, u64 attrs, bool flag, int level)
 {
        int levelshift = level2shift(level);
        u64 levelsize = 1ULL << levelshift;
@@ -509,8 +510,13 @@ static u64 set_one_region(u64 start, u64 size, u64 attrs, int level)
 
        /* Can we can just modify the current level block PTE? */
        if (is_aligned(start, size, levelsize)) {
-               *pte &= ~PMD_ATTRINDX_MASK;
-               *pte |= attrs;
+               if (flag) {
+                       *pte &= ~PMD_ATTRMASK;
+                       *pte |= attrs & PMD_ATTRMASK;
+               } else {
+                       *pte &= ~PMD_ATTRINDX_MASK;
+                       *pte |= attrs & PMD_ATTRINDX_MASK;
+               }
                debug("Set attrs=%llx pte=%p level=%d\n", attrs, pte, level);
 
                return levelsize;
@@ -560,7 +566,8 @@ void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size,
                u64 r;
 
                for (level = 1; level < 4; level++) {
-                       r = set_one_region(start, size, attrs, level);
+                       /* Set d-cache attributes only */
+                       r = set_one_region(start, size, attrs, false, level);
                        if (r) {
                                /* PTE successfully replaced */
                                size -= r;
@@ -581,6 +588,63 @@ void mmu_set_region_dcache_behaviour(phys_addr_t start, size_t size,
        flush_dcache_range(real_start, real_start + real_size);
 }
 
+/*
+ * Modify MMU table for a region with updated PXN/UXN/Memory type/valid bits.
+ * The procecess is break-before-make. The target region will be marked as
+ * invalid during the process of changing.
+ */
+void mmu_change_region_attr(phys_addr_t addr, size_t siz, u64 attrs)
+{
+       int level;
+       u64 r, size, start;
+
+       start = addr;
+       size = siz;
+       /*
+        * Loop through the address range until we find a page granule that fits
+        * our alignment constraints, then set it to "invalid".
+        */
+       while (size > 0) {
+               for (level = 1; level < 4; level++) {
+                       /* Set PTE to fault */
+                       r = set_one_region(start, size, PTE_TYPE_FAULT, true,
+                                          level);
+                       if (r) {
+                               /* PTE successfully invalidated */
+                               size -= r;
+                               start += r;
+                               break;
+                       }
+               }
+       }
+
+       flush_dcache_range(gd->arch.tlb_addr,
+                          gd->arch.tlb_addr + gd->arch.tlb_size);
+       __asm_invalidate_tlb_all();
+
+       /*
+        * Loop through the address range until we find a page granule that fits
+        * our alignment constraints, then set it to the new cache attributes
+        */
+       start = addr;
+       size = siz;
+       while (size > 0) {
+               for (level = 1; level < 4; level++) {
+                       /* Set PTE to new attributes */
+                       r = set_one_region(start, size, attrs, true, level);
+                       if (r) {
+                               /* PTE successfully updated */
+                               size -= r;
+                               start += r;
+                               break;
+                       }
+               }
+       }
+       flush_dcache_range(gd->arch.tlb_addr,
+                          gd->arch.tlb_addr + gd->arch.tlb_size);
+       __asm_invalidate_tlb_all();
+}
+
 #else  /* CONFIG_SYS_DCACHE_OFF */
 
 /*