Components:MM:add early map api

1.The earlycon in dm needs ioremap in early
initialization such as uart mmio.
2.Add name member in rt_region_t that user
could know what's mean of a memory region.

Signed-off-by: GuEe-GUI <[email protected]>

components/mm/ioremap.c

@@ -76,6 +76,16 @@ static void *_ioremap_type(void *paddr, size_t size, enum ioremap_type type)
     return v_addr;
 }
 
+rt_weak void *rt_ioremap_early(void *paddr, size_t size)
+{
+    if (!size)
+    {
+        return RT_NULL;
+    }
+
+    return paddr;
+}
+
 void *rt_ioremap(void *paddr, size_t size)
 {
     return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY);

components/mm/ioremap.h

@@ -30,6 +30,7 @@ extern "C" {
  *                    | Currently as non-cacheable
  */
 
+void *rt_ioremap_early(void *paddr, size_t size);
 void *rt_ioremap(void *paddr, size_t size);
 void *rt_ioremap_nocache(void *paddr, size_t size);
 void *rt_ioremap_cached(void *paddr, size_t size);

components/mm/mm_page.h

@@ -63,6 +63,8 @@ typedef struct tag_region
 {
     rt_size_t start;
     rt_size_t end;
+
+    const char *name;
 } rt_region_t;
 
 extern const rt_size_t rt_mpr_size;

libcpu/aarch64/common/mmu.c

@@ -590,6 +590,31 @@ static int _map_single_page_2M(unsigned long *lv0_tbl, unsigned long va,
     return 0;
 }
 
+void *rt_ioremap_early(void *paddr, size_t size)
+{
+    size_t count;
+    static void *tbl = RT_NULL;
+
+    if (!size)
+    {
+        return RT_NULL;
+    }
+
+    if (!tbl)
+    {
+        tbl = rt_hw_mmu_tbl_get();
+    }
+
+    count = (size + ARCH_SECTION_MASK) >> ARCH_SECTION_SHIFT;
+
+    while (count --> 0)
+    {
+        _map_single_page_2M(tbl, (unsigned long)paddr, (unsigned long)paddr, MMU_MAP_K_DEVICE);
+    }
+
+    return paddr;
+}
+
 static int _init_map_2M(unsigned long *lv0_tbl, unsigned long va,
                         unsigned long pa, unsigned long count,
                         unsigned long attr)