diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.9/0067-generic-Mangle-bootloader-s-kernel-arguments.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-4.9/0067-generic-Mangle-bootloader-s-kernel-arguments.patch | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/target/linux/ipq806x/patches-4.9/0067-generic-Mangle-bootloader-s-kernel-arguments.patch b/target/linux/ipq806x/patches-4.9/0067-generic-Mangle-bootloader-s-kernel-arguments.patch deleted file mode 100644 index be1a7e5648..0000000000 --- a/target/linux/ipq806x/patches-4.9/0067-generic-Mangle-bootloader-s-kernel-arguments.patch +++ /dev/null @@ -1,189 +0,0 @@ -From 71270226b14733a4b1f2cde58ea9265caa50b38d Mon Sep 17 00:00:00 2001 -From: Adrian Panella <ianchi74@outlook.com> -Date: Thu, 9 Mar 2017 09:37:17 +0100 -Subject: [PATCH 67/69] generic: Mangle bootloader's kernel arguments - -The command-line arguments provided by the boot loader will be -appended to a new device tree property: bootloader-args. -If there is a property "append-rootblock" in DT under /chosen -and a root= option in bootloaders command line it will be parsed -and added to DT bootargs with the form: <append-rootblock>XX. -Only command line ATAG will be processed, the rest of the ATAGs -sent by bootloader will be ignored. -This is usefull in dual boot systems, to get the current root partition -without afecting the rest of the system. - -Signed-off-by: Adrian Panella <ianchi74@outlook.com> ---- - arch/arm/Kconfig | 11 +++++ - arch/arm/boot/compressed/atags_to_fdt.c | 72 ++++++++++++++++++++++++++++++++- - init/main.c | 16 ++++++++ - 3 files changed, 98 insertions(+), 1 deletion(-) - ---- a/arch/arm/Kconfig -+++ b/arch/arm/Kconfig -@@ -1948,6 +1948,17 @@ config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEN - The command-line arguments provided by the boot loader will be - appended to the the device tree bootargs property. - -+config ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE -+ bool "Append rootblock parsing bootloader's kernel arguments" -+ help -+ The command-line arguments provided by the boot loader will be -+ appended to a new device tree property: bootloader-args. -+ If there is a property "append-rootblock" in DT under /chosen -+ and a root= option in bootloaders command line it will be parsed -+ and added to DT bootargs with the form: <append-rootblock>XX. -+ Only command line ATAG will be processed, the rest of the ATAGs -+ sent by bootloader will be ignored. -+ - endchoice - - config CMDLINE ---- a/arch/arm/boot/compressed/atags_to_fdt.c -+++ b/arch/arm/boot/compressed/atags_to_fdt.c -@@ -3,6 +3,8 @@ - - #if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND) - #define do_extend_cmdline 1 -+#elif defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE) -+#define do_extend_cmdline 1 - #else - #define do_extend_cmdline 0 - #endif -@@ -66,6 +68,59 @@ static uint32_t get_cell_size(const void - return cell_size; - } - -+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE) -+ -+static char *append_rootblock(char *dest, const char *str, int len, void *fdt) -+{ -+ char *ptr, *end; -+ char *root="root="; -+ int i, l; -+ const char *rootblock; -+ -+ //ARM doesn't have __HAVE_ARCH_STRSTR, so search manually -+ ptr = str - 1; -+ -+ do { -+ //first find an 'r' at the begining or after a space -+ do { -+ ptr++; -+ ptr = strchr(ptr, 'r'); -+ if(!ptr) return dest; -+ -+ } while (ptr != str && *(ptr-1) != ' '); -+ -+ //then check for the rest -+ for(i = 1; i <= 4; i++) -+ if(*(ptr+i) != *(root+i)) break; -+ -+ } while (i != 5); -+ -+ end = strchr(ptr, ' '); -+ end = end ? (end - 1) : (strchr(ptr, 0) - 1); -+ -+ //find partition number (assumes format root=/dev/mtdXX | /dev/mtdblockXX | yy:XX ) -+ for( i = 0; end >= ptr && *end >= '0' && *end <= '9'; end--, i++); -+ ptr = end + 1; -+ -+ /* if append-rootblock property is set use it to append to command line */ -+ rootblock = getprop(fdt, "/chosen", "append-rootblock", &l); -+ if(rootblock != NULL) { -+ if(*dest != ' ') { -+ *dest = ' '; -+ dest++; -+ len++; -+ } -+ if (len + l + i <= COMMAND_LINE_SIZE) { -+ memcpy(dest, rootblock, l); -+ dest += l - 1; -+ memcpy(dest, ptr, i); -+ dest += i; -+ } -+ } -+ return dest; -+} -+#endif -+ - static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline) - { - char cmdline[COMMAND_LINE_SIZE]; -@@ -85,12 +140,21 @@ static void merge_fdt_bootargs(void *fdt - - /* and append the ATAG_CMDLINE */ - if (fdt_cmdline) { -+ -+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE) -+ //save original bootloader args -+ //and append ubi.mtd with root partition number to current cmdline -+ setprop_string(fdt, "/chosen", "bootloader-args", fdt_cmdline); -+ ptr = append_rootblock(ptr, fdt_cmdline, len, fdt); -+ -+#else - len = strlen(fdt_cmdline); - if (ptr - cmdline + len + 2 < COMMAND_LINE_SIZE) { - *ptr++ = ' '; - memcpy(ptr, fdt_cmdline, len); - ptr += len; - } -+#endif - } - *ptr = '\0'; - -@@ -147,7 +211,9 @@ int atags_to_fdt(void *atag_list, void * - else - setprop_string(fdt, "/chosen", "bootargs", - atag->u.cmdline.cmdline); -- } else if (atag->hdr.tag == ATAG_MEM) { -+ } -+#ifndef CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE -+ else if (atag->hdr.tag == ATAG_MEM) { - if (memcount >= sizeof(mem_reg_property)/4) - continue; - if (!atag->u.mem.size) -@@ -186,6 +252,10 @@ int atags_to_fdt(void *atag_list, void * - setprop(fdt, "/memory", "reg", mem_reg_property, - 4 * memcount * memsize); - } -+#else -+ -+ } -+#endif - - return fdt_pack(fdt); - } ---- a/init/main.c -+++ b/init/main.c -@@ -89,6 +89,10 @@ - #include <asm/sections.h> - #include <asm/cacheflush.h> - -+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE) -+#include <linux/of.h> -+#endif -+ - static int kernel_init(void *); - - extern void init_IRQ(void); -@@ -540,6 +544,18 @@ asmlinkage __visible void __init start_k - page_alloc_init(); - - pr_notice("Kernel command line: %s\n", boot_command_line); -+ -+#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_MANGLE) -+ //Show bootloader's original command line for reference -+ if(of_chosen) { -+ const char *prop = of_get_property(of_chosen, "bootloader-args", NULL); -+ if(prop) -+ pr_notice("Bootloader command line (ignored): %s\n", prop); -+ else -+ pr_notice("Bootloader command line not present\n"); -+ } -+#endif -+ - parse_early_param(); - after_dashes = parse_args("Booting kernel", - static_command_line, __start___param, |