meson/gxl: Add tool to create bl31 bootable images

GXL platforms need to have a specific header at the beginning of bl31
image to be able to boot. This adds a tool to create that and calls it at
build time.

Signed-off-by: Remi Pommarel <repk@triplefau.lt>

2 files changed, 143 insertions, 0 deletions

diff --git a/tools/meson/Makefile b/tools/meson/Makefile
new file mode 100644
index 00000000..1a1d1f81
--- /dev/null
+++ b/tools/meson/Makefile
@@ -0,0 +1,49 @@
+#
+# Copyright (C) 2019 Remi Pommarel <repk@triplefau.lt>
+#
+# SPDX-License-Identifier:     BSD-3-Clause
+# https://spdx.org/licenses
+#
+MAKE_HELPERS_DIRECTORY := ../../make_helpers/
+include ${MAKE_HELPERS_DIRECTORY}build_macros.mk
+include ${MAKE_HELPERS_DIRECTORY}build_env.mk
+
+PROJECT := doimage${BIN_EXT}
+OBJECTS := doimage.o
+V := 0
+
+HOSTCCFLAGS := -Wall -Werror -pedantic -std=c99 -D_GNU_SOURCE
+
+ifeq (${DEBUG},1)
+  HOSTCCFLAGS += -g -O0 -DDEBUG
+else
+  HOSTCCFLAGS += -O2
+endif
+
+ifeq (${V},0)
+  Q := @
+else
+  Q :=
+endif
+
+HOSTCC := gcc
+
+.PHONY: all clean distclean
+
+all: ${PROJECT}
+
+${PROJECT}: ${OBJECTS} Makefile
+	@echo "  HOSTLD  $@"
+	${Q}${HOSTCC} ${OBJECTS} -o $@
+	@${ECHO_BLANK_LINE}
+	@echo "Built $@ successfully"
+	@${ECHO_BLANK_LINE}
+
+%.o: %.c Makefile
+	@echo "  HOSTCC  $<"
+	${Q}${HOSTCC} -c ${HOSTCCFLAGS} $< -o $@
+
+clean:
+	$(call SHELL_DELETE_ALL, ${PROJECT} ${OBJECTS})
+
+distclean: clean
diff --git a/tools/meson/doimage.c b/tools/meson/doimage.c
new file mode 100644
index 00000000..b304038d
--- /dev/null
+++ b/tools/meson/doimage.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2019, Remi Pommarel <repk@triplefau.lt>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <endian.h>
+
+#define DEFAULT_PROGNAME "doimage"
+#define PROGNAME(argc, argv) (((argc) >= 1) ? ((argv)[0]) : DEFAULT_PROGNAME)
+
+#define BL31_MAGIC 0x12348765
+#define BL31_LOADADDR 0x05100000
+#define BUFLEN 512
+
+static inline void usage(char const *prog)
+{
+	fprintf(stderr, "Usage: %s <bl31.bin> <bl31.img>\n", prog);
+}
+
+static inline int fdwrite(int fd, uint8_t *data, size_t len)
+{
+	ssize_t nr;
+	size_t l;
+	int ret = -1;
+
+	for (l = 0; l < len; l += nr) {
+		nr = write(fd, data + l, len - l);
+		if (nr < 0) {
+			perror("Cannot write to bl31.img");
+			goto out;
+		}
+	}
+
+	ret = 0;
+out:
+	return ret;
+}
+
+int main(int argc, char **argv)
+{
+	int fin, fout, ret = -1;
+	ssize_t len;
+	uint32_t data;
+	uint8_t buf[BUFLEN];
+
+	if (argc != 3) {
+		usage(PROGNAME(argc, argv));
+		goto out;
+	}
+
+	fin = open(argv[1], O_RDONLY);
+	if (fin < 0) {
+		perror("Cannot open bl31.bin");
+		goto out;
+	}
+
+	fout = open(argv[2], O_WRONLY | O_CREAT, 0660);
+	if (fout < 0) {
+		perror("Cannot open bl31.img");
+		goto closefin;
+	}
+
+	data = htole32(BL31_MAGIC);
+	if (fdwrite(fout, (uint8_t *)&data, sizeof(data)) < 0)
+		goto closefout;
+
+	lseek(fout, 8, SEEK_SET);
+	data = htole32(BL31_LOADADDR);
+	if (fdwrite(fout, (uint8_t *)&data, sizeof(data)) < 0)
+		goto closefout;
+
+	lseek(fout, 0x200, SEEK_SET);
+	while ((len = read(fin, buf, sizeof(buf))) > 0)
+		if (fdwrite(fout, buf, len) < 0)
+			goto closefout;
+	if (len < 0) {
+		perror("Cannot read bl31.bin");
+		goto closefout;
+	}
+
+	ret = 0;
+
+closefout:
+	close(fout);
+closefin:
+	close(fin);
+out:
+	return ret;
+}