diff options
Diffstat (limited to 'board/renesas/rcar-common/gen3-common.c')
| -rw-r--r-- | board/renesas/rcar-common/gen3-common.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/board/renesas/rcar-common/gen3-common.c b/board/renesas/rcar-common/gen3-common.c new file mode 100644 index 00000000000..4291e1d5bcb --- /dev/null +++ b/board/renesas/rcar-common/gen3-common.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * board/renesas/rcar-common/gen3-common.c + * + * Copyright (C) 2013 Renesas Electronics Corporation + * Copyright (C) 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> + * Copyright (C) 2015 Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + */ + +#include <dm.h> +#include <fdt_support.h> +#include <hang.h> +#include <init.h> +#include <asm/global_data.h> +#include <asm/io.h> +#include <dm/uclass-internal.h> +#include <asm/arch/renesas.h> +#include <linux/libfdt.h> + +#ifdef CONFIG_RCAR_64 + +DECLARE_GLOBAL_DATA_PTR; + +/* If the firmware passed a device tree use it for e.g. U-Boot DRAM setup. */ +extern u64 rcar_atf_boot_args[]; + +#define FDT_RPC_PATH "/soc/spi@ee200000" + +static void apply_atf_overlay(void *fdt_blob) +{ + void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]); + + if (fdt_magic(atf_fdt_blob) == FDT_MAGIC) + fdt_overlay_apply_node(fdt_blob, 0, atf_fdt_blob, 0); +} + +int fdtdec_board_setup(const void *fdt_blob) +{ + apply_atf_overlay((void *)fdt_blob); + + return 0; +} + +#define RST_BASE 0xE6160000 +#define RST_CA57RESCNT (RST_BASE + 0x40) +#define RST_CA53RESCNT (RST_BASE + 0x44) +#define RST_RSTOUTCR (RST_BASE + 0x58) +#define RST_CA57_CODE 0xA5A5000F +#define RST_CA53_CODE 0x5A5A000F + +void __weak reset_cpu(void) +{ + unsigned long midr, cputype; + + asm volatile("mrs %0, midr_el1" : "=r" (midr)); + cputype = (midr >> 4) & 0xfff; + + if (cputype == 0xd03) + writel(RST_CA53_CODE, RST_CA53RESCNT); + else if (cputype == 0xd07) + writel(RST_CA57_CODE, RST_CA57RESCNT); + else + hang(); +} + +#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; + + log_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; +} + +static void scrub_duplicate_memory(void *blob) +{ + /* + * 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; + } +} + +static void update_rpc_status(void *blob) +{ + void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]); + int offset, enabled; + + /* + * Check if the DT fragment received from TF-A had its RPC-IF device node + * enabled. + */ + if (fdt_magic(atf_fdt_blob) != FDT_MAGIC) + return; + + offset = fdt_path_offset(atf_fdt_blob, FDT_RPC_PATH); + if (offset < 0) + return; + + enabled = fdtdec_get_is_enabled(atf_fdt_blob, offset); + if (!enabled) + return; + + /* + * Find the RPC-IF device node, and enable it if it has a flash subnode. + */ + offset = fdt_path_offset(blob, FDT_RPC_PATH); + if (offset < 0) + return; + + if (fdt_subnode_offset(blob, offset, "flash") < 0) + return; + + fdt_status_okay(blob, offset); +} + +int ft_board_setup(void *blob, struct bd_info *bd) +{ + apply_atf_overlay(blob); + scrub_duplicate_memory(blob); + update_rpc_status(blob); + + return 0; +} +#endif +#endif |