ADD: CoreBoot, also comes with my reimplementation of libfdt, which is just a dumb rewrite.

Signed-off-by: Amlal <amlal.elmahrouss@icloud.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/libfdt/libfdt_strerror.c b/libfdt/libfdt_strerror.c
new file mode 100644
index 0000000..4002afc
--- /dev/null
+++ b/libfdt/libfdt_strerror.c
@@ -0,0 +1,75 @@
+/* -------------------------------------------
+
+    Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#include <libfdt/libfdt_env.h>
+#include <libfdt/libfdt.h>
+
+/***********************************************************************************/
+/*	@brief FDT error reporting system        									   */
+/***********************************************************************************/
+
+/// @brief Error information structure.
+struct fdt_err
+{
+	const char* e_str;
+};
+
+#define fdt_error(VAL) \
+	[(VAL)] = {        \
+		.e_str = #VAL, \
+	}
+
+static struct fdt_err mp_fdtErrTbl[] = {
+	fdt_error(FDT_ERR_NOTFOUND),
+	fdt_error(FDT_ERR_EXISTS),
+	fdt_error(FDT_ERR_NOSPACE),
+
+	fdt_error(FDT_ERR_BADOFFSET),
+	fdt_error(FDT_ERR_BADPATH),
+	fdt_error(FDT_ERR_BADPHANDLE),
+	fdt_error(FDT_ERR_BADSTATE),
+
+	fdt_error(FDT_ERR_TRUNCATED),
+	fdt_error(FDT_ERR_BADMAGIC),
+	fdt_error(FDT_ERR_BADVERSION),
+	fdt_error(FDT_ERR_BADSTRUCTURE),
+	fdt_error(FDT_ERR_BADLAYOUT),
+	fdt_error(FDT_ERR_INTERNAL),
+	fdt_error(FDT_ERR_BADNCELLS),
+	fdt_error(FDT_ERR_BADVALUE),
+	fdt_error(FDT_ERR_BADOVERLAY),
+	fdt_error(FDT_ERR_NOPHANDLES),
+	fdt_error(FDT_ERR_BADFLAGS),
+	fdt_error(FDT_ERR_ALIGNMENT),
+};
+
+#define fdt_error_length() mpux_array_size(mp_fdtErrTbl)
+
+/// @brief Returns the error value as a string.
+/// @param errval
+/// @return
+const char* fdt_strerror(int32_t errval)
+{
+	if (errval > 0)
+	{
+		return ("<valid offset/length>");
+	}
+	else if (errval == 0)
+	{
+		return ("<no error>");
+	}
+	else if (-errval < fdt_error_length())
+	{
+		const char* serr = mp_fdtErrTbl[errval].e_str;
+
+		if (serr != null)
+		{
+			return serr;
+		}
+	}
+
+	return ("<unknown error>");
+}