Scrub duplicate /memory@* node entries here. Some R-Car DTs might contain multiple /memory@* nodes, however fdt_fixup_memory_banks() either generates single /memory node or updates the first /memory node. Any remaining memory nodes are thus potential duplicates.
However, it is not possible to delete all the memory nodes right away, since some of those might not be DRAM memory nodes, but some sort of other memory. Thus, delete only the memory nodes which are in the R-Car3 DBSC ranges. Signed-off-by: Marek Vasut <[email protected]> --- arch/arm/mach-rmobile/Kconfig | 1 + board/renesas/rcar-common/common.c | 80 ++++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+) diff --git a/arch/arm/mach-rmobile/Kconfig b/arch/arm/mach-rmobile/Kconfig index 8cef3f5675..41322b2c4c 100644 --- a/arch/arm/mach-rmobile/Kconfig +++ b/arch/arm/mach-rmobile/Kconfig @@ -13,6 +13,7 @@ config RCAR_GEN3 select ARM64 select PHY select CMD_CACHE + select OF_BOARD_SETUP select PINCTRL select PINCONF select PINCTRL_PFC diff --git a/board/renesas/rcar-common/common.c b/board/renesas/rcar-common/common.c index e77357968a..c53a74ae74 100644 --- a/board/renesas/rcar-common/common.c +++ b/board/renesas/rcar-common/common.c @@ -43,4 +43,84 @@ int dram_init_banksize(void) return 0; } + +#if defined(CONFIG_OF_BOARD_SETUP) +static int is_mem_overlap(void *blob, int first_mem_node, int curr_mem_node) +{ + struct fdt_resource first_mem_res, curr_mem_res; + int curr_mem_reg, first_mem_reg = 0; + int ret; + + for (;;) { + ret = fdt_get_resource(blob, first_mem_node, "reg", + first_mem_reg++, &first_mem_res); + if (ret) /* No more entries, no overlap found */ + return 0; + + curr_mem_reg = 0; + for (;;) { + ret = fdt_get_resource(blob, curr_mem_node, "reg", + curr_mem_reg++, &curr_mem_res); + if (ret) /* No more entries, check next tuple */ + break; + + if (curr_mem_res.end < first_mem_res.start) + continue; + + if (curr_mem_res.start >= first_mem_res.end) + continue; + + debug("Overlap found: 0x%llx..0x%llx / 0x%llx..0x%llx\n", + first_mem_res.start, first_mem_res.end, + curr_mem_res.start, curr_mem_res.end); + + return 1; + } + } + + return 0; +} + +int ft_board_setup(void *blob, struct bd_info *bd) +{ + /* + * Scrub duplicate /memory@* node entries here. Some R-Car DTs might + * contain multiple /memory@* nodes, however fdt_fixup_memory_banks() + * either generates single /memory node or updates the first /memory + * node. Any remaining memory nodes are thus potential duplicates. + * + * However, it is not possible to delete all the memory nodes right + * away, since some of those might not be DRAM memory nodes, but some + * sort of other memory. Thus, delete only the memory nodes which are + * in the R-Car3 DBSC ranges. + */ + int mem = 0, first_mem_node = 0; + + for (;;) { + mem = fdt_node_offset_by_prop_value(blob, mem, + "device_type", "memory", 7); + if (mem < 0) + break; + if (!fdtdec_get_is_enabled(blob, mem)) + continue; + + /* First memory node, patched by U-Boot */ + if (!first_mem_node) { + first_mem_node = mem; + continue; + } + + /* Check the remaining nodes and delete duplicates */ + if (!is_mem_overlap(blob, first_mem_node, mem)) + continue; + + /* Delete duplicate node, start again */ + fdt_del_node(blob, mem); + first_mem_node = 0; + mem = 0; + } + + return 0; +} +#endif #endif -- 2.30.2
