From fd03516f7b53e135e1cb0029a899851a01d0fbde Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 9 Jun 2016 16:00:30 +0200 Subject: [PATCH] libfdt: Add option to disable arch_fixup_fdt() calls 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 --- Kconfig | 8 ++++++++ arch/arm/lib/bootm-fdt.c | 2 ++ common/image-fdt.c | 3 +++ 3 files changed, 13 insertions(+) diff --git a/Kconfig b/Kconfig index 3ceff250321..f25dd7b7174 100644 --- a/Kconfig +++ b/Kconfig @@ -319,6 +319,14 @@ config SYS_CLK_FREQ help TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture +config DISABLE_ARCH_FIXUP_FDT + bool "Disable arch_fixup_fdt() call" + depends on ARM + help + Disable 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 76b75d8e464..6e87b59ad4c 100644 --- a/arch/arm/lib/bootm-fdt.c +++ b/arch/arm/lib/bootm-fdt.c @@ -24,6 +24,7 @@ DECLARE_GLOBAL_DATA_PTR; +#ifndef CONFIG_DISABLE_ARCH_FIXUP_FDT int arch_fixup_fdt(void *blob) { bd_t *bd = gd->bd; @@ -53,3 +54,4 @@ int arch_fixup_fdt(void *blob) return 0; } +#endif diff --git a/common/image-fdt.c b/common/image-fdt.c index 6cac7dbb7f8..9e05becd464 100644 --- a/common/image-fdt.c +++ b/common/image-fdt.c @@ -460,6 +460,9 @@ __weak int ft_verify_fdt(void *fdt) __weak int arch_fixup_fdt(void *blob) { +#ifdef CONFIG_DISABLE_ARCH_FIXUP_FDT + printf("## Disable arch_fixup_fdt()\n"); +#endif return 0; } -- 2.47.3