To simplify configuration and keep synchronized the PStore/Ramoops between U-Boot and the Linux kernel, this commit dynamically adds the Ramoops parameters defined in the U-Boot session to the Device Tree.
Signed-off-by: Frédéric Danis frederic.danis@collabora.com --- cmd/pstore.c | 38 ++++++++++++++++++++++++++++++++++++++ common/image-fdt.c | 4 ++++ doc/pstore.rst | 2 ++ include/fdt_support.h | 3 +++ 4 files changed, 47 insertions(+)
diff --git a/cmd/pstore.c b/cmd/pstore.c index 4e4d70d604..6cad635620 100644 --- a/cmd/pstore.c +++ b/cmd/pstore.c @@ -479,6 +479,44 @@ static int do_pstore(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return c->cmd(cmdtp, flag, argc, argv); }
+void fdt_fixup_pstore(void *blob) +{ + char node[32]; + int nodeoffset; /* node offset from libfdt */ + + nodeoffset = fdt_path_offset(blob, "/"); + if (nodeoffset < 0) { + /* Not found or something else bad happened. */ + log_debug("fdt_path_offset() returned %s\n", fdt_strerror(nodeoffset)); + return; + } + + nodeoffset = fdt_add_subnode(blob, nodeoffset, "reserved-memory"); + if (nodeoffset < 0) { + log_debug("Add 'reserved-memory' node failed: %s\n", + fdt_strerror(nodeoffset)); + return; + } + fdt_appendprop_u32(blob, nodeoffset, "#address-cells", 2); + fdt_appendprop_u32(blob, nodeoffset, "#size-cells", 2); + fdt_appendprop(blob, nodeoffset, "ranges", NULL, 0); + + sprintf(node, "ramoops@%llx", (unsigned long long)pstore_addr); + nodeoffset = fdt_add_subnode(blob, nodeoffset, node); + if (nodeoffset < 0) { + log_debug("Add '%s' node failed: %s\n", node, fdt_strerror(nodeoffset)); + return; + } + fdt_appendprop_string(blob, nodeoffset, "compatible", "ramoops"); + fdt_appendprop_u64(blob, nodeoffset, "reg", pstore_addr); + fdt_appendprop_u64(blob, nodeoffset, "reg", pstore_length); + fdt_appendprop_u32(blob, nodeoffset, "record-size", pstore_record_size); + fdt_appendprop_u32(blob, nodeoffset, "console-size", pstore_console_size); + fdt_appendprop_u32(blob, nodeoffset, "ftrace-size", pstore_ftrace_size); + fdt_appendprop_u32(blob, nodeoffset, "pmsg-size", pstore_pmsg_size); + fdt_appendprop_u32(blob, nodeoffset, "ecc-size", pstore_ecc_size); +} + U_BOOT_CMD(pstore, 10, 0, do_pstore, "Manage Linux Persistent Storage", "set <addr> <len> [record-size] [console-size] [ftrace-size] [pmsg_size] [ecc-size]\n" diff --git a/common/image-fdt.c b/common/image-fdt.c index 3002948b6b..491d55ad1a 100644 --- a/common/image-fdt.c +++ b/common/image-fdt.c @@ -547,6 +547,10 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob, } /* Update ethernet nodes */ fdt_fixup_ethernet(blob); +#if CONFIG_IS_ENABLED(CMD_PSTORE) + /* Append PStore configuration */ + fdt_fixup_pstore(blob); +#endif if (IMAGE_OF_BOARD_SETUP) { fdt_ret = ft_board_setup(blob, gd->bd); if (fdt_ret) { diff --git a/doc/pstore.rst b/doc/pstore.rst index 3ed2e9e0fd..3c84b8b172 100644 --- a/doc/pstore.rst +++ b/doc/pstore.rst @@ -24,6 +24,8 @@ i.e.::
The same values should be set in U-Boot to be able to retrieve the records. This values can be set at build time in U-Boot configuration file, or at runtime. +U-Boot automatically patches the Device Tree to pass the Ramoops parameters to +the kernel.
The PStore configuration parameters are:
diff --git a/include/fdt_support.h b/include/fdt_support.h index ba14acd7f6..7afbdcfe37 100644 --- a/include/fdt_support.h +++ b/include/fdt_support.h @@ -350,4 +350,7 @@ int fdt_update_ethernet_dt(void *blob); #ifdef CONFIG_FSL_MC_ENET void fdt_fixup_board_enet(void *blob); #endif +#ifdef CONFIG_CMD_PSTORE +void fdt_fixup_pstore(void *blob); +#endif #endif /* ifndef __FDT_SUPPORT_H */