From e0418347f9aa0f5099dfc1dac8eafceb98e38ccf Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 25 Sep 2019 11:00:17 +0200 Subject: [PATCH] microblaze: Setup initrd_high and fdt_high at run time Setup initrd_high and fdt_high to be placed in lowmem space for kernel to be able to reach it. Values are setup at run time to ensure that the same setting can be used on different memory setup. Do this setting only when variables are not Similar run time detection was done for Zynqmp and Versal. Signed-off-by: Michal Simek --- arch/microblaze/Kconfig | 8 ++++++++ .../microblaze-generic/microblaze-generic.c | 19 +++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 5cc68d63c4..5ce8261451 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -20,6 +20,14 @@ config TARGET_MICROBLAZE_GENERIC endchoice +config STACK_SIZE + hex "Define max stack size that can be used by u-boot" + default 0x200000 + help + Defines Max stack size that can be used by u-boot so that the + initrd_high will be calculated as base stack pointer minus this + stack size. + source "board/xilinx/microblaze-generic/Kconfig" config SPL_LDSCRIPT diff --git a/board/xilinx/microblaze-generic/microblaze-generic.c b/board/xilinx/microblaze-generic/microblaze-generic.c index 4e038ddf0c..30be0150f3 100644 --- a/board/xilinx/microblaze-generic/microblaze-generic.c +++ b/board/xilinx/microblaze-generic/microblaze-generic.c @@ -21,6 +21,7 @@ #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; @@ -39,6 +40,8 @@ int dram_init(void) int board_late_init(void) { + ulong max_size, lowmem_size; + #if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SYSRESET_MICROBLAZE) int ret; @@ -47,5 +50,21 @@ int board_late_init(void) if (ret) printf("Warning: No reset driver: ret=%d\n", ret); #endif + + if (!(gd->flags & GD_FLG_ENV_DEFAULT)) { + debug("Saved variables - Skipping\n"); + return 0; + } + + max_size = gd->start_addr_sp - CONFIG_STACK_SIZE; + max_size = round_down(max_size, SZ_16M); + + /* Linux default LOWMEM_SIZE is 0x30000000 = 768MB */ + lowmem_size = gd->ram_base + 768 * 1024 * 1024; + + env_set_addr("initrd_high", (void *)min_t(ulong, max_size, + lowmem_size)); + env_set_addr("fdt_high", (void *)min_t(ulong, max_size, lowmem_size)); + return 0; } -- 2.25.1