PPC: e500: dt: create memory node dynamically

[qemu.git] / device_tree.c

diff --git a/device_tree.c b/device_tree.c
index e213323dc2c10d72d6e1674cc5c5126c40b25c10..c8d68c203e493dd3954a6fa0699c83c1654cd26d 100644 (file)
--- a/device_tree.c
+++ b/device_tree.c
@@ -20,16 +20,52 @@
 
 #include "config.h"
 #include "qemu-common.h"
-#include "sysemu.h"
 #include "device_tree.h"
+#include "hw/loader.h"
 
 #include <libfdt.h>
 
+#define FDT_MAX_SIZE  0x10000
+
+void *create_device_tree(int *sizep)
+{
+    void *fdt;
+    int ret;
+
+    *sizep = FDT_MAX_SIZE;
+    fdt = g_malloc0(FDT_MAX_SIZE);
+    ret = fdt_create(fdt, FDT_MAX_SIZE);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_begin_node(fdt, "");
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_end_node(fdt);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_finish(fdt);
+    if (ret < 0) {
+        goto fail;
+    }
+    ret = fdt_open_into(fdt, fdt, *sizep);
+    if (ret) {
+        fprintf(stderr, "Unable to copy device tree in memory\n");
+        exit(1);
+    }
+
+    return fdt;
+fail:
+    fprintf(stderr, "%s Couldn't create dt: %s\n", __func__, fdt_strerror(ret));
+    exit(1);
+}
+
 void *load_device_tree(const char *filename_path, int *sizep)
 {
     int dt_size;
     int dt_file_load_size;
-    int new_dt_size;
     int ret;
     void *fdt = NULL;
 
@@ -42,9 +78,10 @@ void *load_device_tree(const char *filename_path, int *sizep)
     }
 
     /* Expand to 2x size to give enough room for manipulation.  */
+    dt_size += 10000;
     dt_size *= 2;
     /* First allocate space in qemu for device tree */
-    fdt = qemu_mallocz(dt_size);
+    fdt = g_malloc0(dt_size);
 
     dt_file_load_size = load_image(filename_path, fdt);
     if (dt_file_load_size < 0) {
@@ -69,42 +106,147 @@ void *load_device_tree(const char *filename_path, int *sizep)
     return fdt;
 
 fail:
-    qemu_free(fdt);
+    g_free(fdt);
     return NULL;
 }
 
-int qemu_devtree_setprop(void *fdt, const char *node_path,
-                         const char *property, uint32_t *val_array, int size)
+static int findnode_nofail(void *fdt, const char *node_path)
 {
     int offset;
 
     offset = fdt_path_offset(fdt, node_path);
-    if (offset < 0)
-        return offset;
+    if (offset < 0) {
+        fprintf(stderr, "%s Couldn't find node %s: %s\n", __func__, node_path,
+                fdt_strerror(offset));
+        exit(1);
+    }
+
+    return offset;
+}
+
+int qemu_devtree_setprop(void *fdt, const char *node_path,
+                         const char *property, void *val_array, int size)
+{
+    int r;
+
+    r = fdt_setprop(fdt, findnode_nofail(fdt, node_path), property, val_array, size);
+    if (r < 0) {
+        fprintf(stderr, "%s: Couldn't set %s/%s: %s\n", __func__, node_path,
+                property, fdt_strerror(r));
+        exit(1);
+    }
 
-    return fdt_setprop(fdt, offset, property, val_array, size);
+    return r;
 }
 
 int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
                               const char *property, uint32_t val)
 {
-    int offset;
+    int r;
 
-    offset = fdt_path_offset(fdt, node_path);
-    if (offset < 0)
-        return offset;
+    r = fdt_setprop_cell(fdt, findnode_nofail(fdt, node_path), property, val);
+    if (r < 0) {
+        fprintf(stderr, "%s: Couldn't set %s/%s = %#08x: %s\n", __func__,
+                node_path, property, val, fdt_strerror(r));
+        exit(1);
+    }
+
+    return r;
+}
 
-    return fdt_setprop_cell(fdt, offset, property, val);
+int qemu_devtree_setprop_u64(void *fdt, const char *node_path,
+                             const char *property, uint64_t val)
+{
+    val = cpu_to_be64(val);
+    return qemu_devtree_setprop(fdt, node_path, property, &val, sizeof(val));
 }
 
 int qemu_devtree_setprop_string(void *fdt, const char *node_path,
                                 const char *property, const char *string)
 {
-    int offset;
+    int r;
 
-    offset = fdt_path_offset(fdt, node_path);
-    if (offset < 0)
-        return offset;
+    r = fdt_setprop_string(fdt, findnode_nofail(fdt, node_path), property, string);
+    if (r < 0) {
+        fprintf(stderr, "%s: Couldn't set %s/%s = %s: %s\n", __func__,
+                node_path, property, string, fdt_strerror(r));
+        exit(1);
+    }
+
+    return r;
+}
+
+uint32_t qemu_devtree_get_phandle(void *fdt, const char *path)
+{
+    uint32_t r;
+
+    r = fdt_get_phandle(fdt, findnode_nofail(fdt, path));
+    if (r <= 0) {
+        fprintf(stderr, "%s: Couldn't get phandle for %s: %s\n", __func__,
+                path, fdt_strerror(r));
+        exit(1);
+    }
+
+    return r;
+}
+
+int qemu_devtree_setprop_phandle(void *fdt, const char *node_path,
+                                 const char *property,
+                                 const char *target_node_path)
+{
+    uint32_t phandle = qemu_devtree_get_phandle(fdt, target_node_path);
+    return qemu_devtree_setprop_cell(fdt, node_path, property, phandle);
+}
+
+uint32_t qemu_devtree_alloc_phandle(void *fdt)
+{
+    static int phandle = 0x8000;
+
+    return phandle++;
+}
+
+int qemu_devtree_nop_node(void *fdt, const char *node_path)
+{
+    int r;
+
+    r = fdt_nop_node(fdt, findnode_nofail(fdt, node_path));
+    if (r < 0) {
+        fprintf(stderr, "%s: Couldn't nop node %s: %s\n", __func__, node_path,
+                fdt_strerror(r));
+        exit(1);
+    }
+
+    return r;
+}
+
+int qemu_devtree_add_subnode(void *fdt, const char *name)
+{
+    char *dupname = g_strdup(name);
+    char *basename = strrchr(dupname, '/');
+    int retval;
+    int parent = 0;
+
+    if (!basename) {
+        g_free(dupname);
+        return -1;
+    }
+
+    basename[0] = '\0';
+    basename++;
+
+    if (dupname[0]) {
+        parent = findnode_nofail(fdt, dupname);
+    }
+
+    retval = fdt_add_subnode(fdt, parent, basename);
+#if 0
+    if (retval < 0) {
+        fprintf(stderr, "FDT: Failed to create subnode %s: %s\n", name,
+                fdt_strerror(retval));
+        exit(1);
+    }
+#endif
 
-    return fdt_setprop_string(fdt, offset, property, string);
+    g_free(dupname);
+    return retval;
 }