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babdbde68f
Add a way to find the byte offset of a property within the device tree. This is only supported with the normal libfdt implementation since fdtget does not provide this information. Signed-off-by: Simon Glass <sjg@chromium.org>
114 lines
3.0 KiB
Plaintext
114 lines
3.0 KiB
Plaintext
/* File: libfdt.i */
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%module libfdt
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%{
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#define SWIG_FILE_WITH_INIT
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#include "libfdt.h"
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%}
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%pythoncode %{
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def Raise(errnum):
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raise ValueError('Error %s' % fdt_strerror(errnum))
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def Name(fdt, offset):
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name, len = fdt_get_name(fdt, offset)
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return name
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def String(fdt, offset):
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offset = fdt32_to_cpu(offset)
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name = fdt_string(fdt, offset)
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return name
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def swap32(x):
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return (((x << 24) & 0xFF000000) |
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((x << 8) & 0x00FF0000) |
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((x >> 8) & 0x0000FF00) |
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((x >> 24) & 0x000000FF))
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def fdt32_to_cpu(x):
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return swap32(x)
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def Data(prop):
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set_prop(prop)
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return get_prop_data()
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%}
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%include "typemaps.i"
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%include "cstring.i"
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%typemap(in) void* = char*;
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typedef int fdt32_t;
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struct fdt_property {
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fdt32_t tag;
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fdt32_t len;
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fdt32_t nameoff;
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char data[0];
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};
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/*
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* This is a work-around since I'm not sure of a better way to copy out the
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* contents of a string. This is used in dtoc/GetProps(). The intent is to
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* pass in a pointer to a property and access the data field at the end of
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* it. Ideally the Data() function above would be able to do this directly,
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* but I'm not sure how to do that.
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*/
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#pragma SWIG nowarn=454
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%inline %{
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static struct fdt_property *cur_prop;
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void set_prop(struct fdt_property *prop) {
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cur_prop = prop;
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}
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%}
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%cstring_output_allocate_size(char **s, int *sz, free(*$1));
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%inline %{
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void get_prop_data(char **s, int *sz) {
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*sz = fdt32_to_cpu(cur_prop->len);
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*s = (char *)malloc(*sz);
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if (!*s)
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*sz = 0;
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else
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memcpy(*s, cur_prop + 1, *sz);
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}
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%}
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%typemap(in) (const void *) {
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if (!PyByteArray_Check($input)) {
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SWIG_exception_fail(SWIG_TypeError, "in method '" "$symname" "', argument "
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"$argnum"" of type '" "$type""'");
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}
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$1 = (void *) PyByteArray_AsString($input);
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}
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const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
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int fdt_path_offset(const void *fdt, const char *path);
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int fdt_first_property_offset(const void *fdt, int nodeoffset);
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int fdt_next_property_offset(const void *fdt, int offset);
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const char *fdt_strerror(int errval);
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const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
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int offset,
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int *OUTPUT);
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const char *fdt_get_name(const void *fdt, int nodeoffset, int *OUTPUT);
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const char *fdt_string(const void *fdt, int stroffset);
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int fdt_first_subnode(const void *fdt, int offset);
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int fdt_next_subnode(const void *fdt, int offset);
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%typemap(in) (void *) {
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if (!PyByteArray_Check($input)) {
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SWIG_exception_fail(SWIG_TypeError, "in method '" "$symname" "', argument "
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"$argnum"" of type '" "$type""'");
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}
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$1 = PyByteArray_AsString($input);
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}
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int fdt_delprop(void *fdt, int nodeoffset, const char *name);
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const char *fdt_strerror(int errval);
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int fdt_pack(void *fdt);
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int fdt_totalsize(const void *fdt);
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int fdt_off_dt_struct(const void *fdt);
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