libfdt: Introduce new ARCH_FIXUP_FDT option

Add new Kconfig option to disable arch_fixup_fdt() calls for cases where
U-Boot shouldn't update memory setup in DTB file.
One example of usage of this option is to boot OS with different memory
setup than U-Boot use.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>

diff --git a/Kconfig b/Kconfig
index ef12f9f..626e82f 100644 (file)
--- a/Kconfig
+++ b/Kconfig
@@ -342,6 +342,15 @@ config SYS_CLK_FREQ
        help
          TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
 
+config ARCH_FIXUP_FDT
+       bool "Enable arch_fixup_fdt() call"
+       depends on ARM || MIPS
+       default y
+       help
+         Enable FDT memory map syncup before OS boot. This feature can be
+         used for booting OS with different memory setup where the part of
+         the memory location should be used for different purpose.
+
 endmenu                # Boot images
 
 source "common/Kconfig"

diff --git a/arch/arm/lib/bootm-fdt.c b/arch/arm/lib/bootm-fdt.c
index 4481f9e..a517550 100644 (file)
--- a/arch/arm/lib/bootm-fdt.c
+++ b/arch/arm/lib/bootm-fdt.c
@@ -25,6 +25,7 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifdef CONFIG_ARCH_FIXUP_FDT
 int arch_fixup_fdt(void *blob)
 {
        bd_t *bd = gd->bd;
@@ -60,3 +61,4 @@ int arch_fixup_fdt(void *blob)
 
        return 0;
 }
+#endif

diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index c20ef22..f9ed7fe 100644 (file)
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -367,8 +367,10 @@ void boot_prep_vxworks(bootm_headers_t *images)
        if (images->ft_addr) {
                off = fdt_path_offset(images->ft_addr, "/memory");
                if (off < 0) {
+#ifdef CONFIG_ARCH_FIXUP_FDT
                        if (arch_fixup_fdt(images->ft_addr))
                                puts("## WARNING: fixup memory failed!\n");
+#endif
                }
        }
 #endif

diff --git a/arch/mips/lib/bootm.c b/arch/mips/lib/bootm.c
index aa0475a..0c6a4ab 100644 (file)
--- a/arch/mips/lib/bootm.c
+++ b/arch/mips/lib/bootm.c
@@ -253,6 +253,7 @@ static int boot_reloc_fdt(bootm_headers_t *images)
 #endif
 }
 
+#ifdef CONFIG_ARCH_FIXUP_FDT
 int arch_fixup_fdt(void *blob)
 {
 #if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
@@ -264,6 +265,7 @@ int arch_fixup_fdt(void *blob)
        return 0;
 #endif
 }
+#endif
 
 static int boot_setup_fdt(bootm_headers_t *images)
 {

diff --git a/common/image-fdt.c b/common/image-fdt.c
index 6cac7db..d6ee225 100644 (file)
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -458,11 +458,6 @@ __weak int ft_verify_fdt(void *fdt)
        return 1;
 }
 
-__weak int arch_fixup_fdt(void *blob)
-{
-       return 0;
-}
-
 int image_setup_libfdt(bootm_headers_t *images, void *blob,
                       int of_size, struct lmb *lmb)
 {
@@ -479,10 +474,12 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob,
                printf("ERROR: /chosen node create failed\n");
                goto err;
        }
+#ifdef CONFIG_ARCH_FIXUP_FDT
        if (arch_fixup_fdt(blob) < 0) {
                printf("ERROR: arch-specific fdt fixup failed\n");
                goto err;
        }
+#endif
        if (IMAGE_OF_BOARD_SETUP) {
                fdt_ret = ft_board_setup(blob, gd->bd);
                if (fdt_ret) {