import RT-Thread@9217865c without bsp, libcpu and components/net

components/mm/mm_kmem.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-11-14     WangXiaoyao  the first version
+ */
+
+#include <rtthread.h>
+#define DBG_TAG "mm.kmem"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#include "mm_aspace.h"
+#include "mm_private.h"
+#include <mmu.h>
+
+static void list_kmem(void)
+{
+    rt_aspace_print_all(&rt_kernel_space);
+}
+MSH_CMD_EXPORT(list_kmem, List varea in kernel virtual memory space);
+
+void rt_kmem_list(void) __attribute__((alias("list_kmem")));
+
+static rt_ubase_t rt_pv_offset;
+
+rt_ubase_t rt_kmem_pvoff(void)
+{
+    return rt_pv_offset;
+}
+
+void rt_kmem_pvoff_set(rt_ubase_t pvoff)
+{
+    rt_pv_offset = pvoff;
+}
+
+#define _KMEM_LO_OFF(addr) ((rt_ubase_t)(addr) & ARCH_PAGE_MASK)
+
+int rt_kmem_map_phy(void *va, void *pa, rt_size_t length, rt_size_t attr)
+{
+    int err;
+    size_t lo_off;
+    lo_off = _KMEM_LO_OFF(pa);
+
+    if (va == RT_NULL)
+    {
+        LOG_E("%s: va NULL is not a valid input", __func__);
+        err = -RT_EINVAL;
+    }
+    else if (_KMEM_LO_OFF(pa) != _KMEM_LO_OFF(va))
+    {
+        LOG_E("%s: misaligned PA(%p) to VA(%p)", __func__, pa, va);
+        err = -RT_EINVAL;
+    }
+    else
+    {
+        struct rt_mm_va_hint hint = {.flags = MMF_MAP_FIXED,
+                                    .limit_range_size = rt_kernel_space.size,
+                                    .limit_start = rt_kernel_space.start,
+                                    .prefer = va,
+                                    .map_size = RT_ALIGN(length + lo_off, ARCH_PAGE_SIZE)};
+
+        err = rt_aspace_map_phy(&rt_kernel_space, &hint, attr, MM_PA_TO_OFF(pa), &va);
+
+        if (err)
+        {
+            LOG_W("%s: map %p to %p (%p bytes) failed(err %d)", __func__, pa, va, length, err);
+        }
+    }
+
+    return err;
+}
+
+void *rt_kmem_v2p(void *vaddr)
+{
+    return rt_hw_mmu_v2p(&rt_kernel_space, vaddr);
+}