diff options
Diffstat (limited to 'target/linux/generic/patches-3.2/333-mips-kexec-get-kernel-parameters-from-kexec-tools.patch')
| -rw-r--r-- | target/linux/generic/patches-3.2/333-mips-kexec-get-kernel-parameters-from-kexec-tools.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.2/333-mips-kexec-get-kernel-parameters-from-kexec-tools.patch b/target/linux/generic/patches-3.2/333-mips-kexec-get-kernel-parameters-from-kexec-tools.patch new file mode 100644 index 0000000000..9da936314c --- /dev/null +++ b/target/linux/generic/patches-3.2/333-mips-kexec-get-kernel-parameters-from-kexec-tools.patch @@ -0,0 +1,88 @@ +From 240c76841b26f1b09aaced33414ee1d08b6454cf Mon Sep 17 00:00:00 2001 +From: Wu Zhangjin <wuzhangjin@gmail.com> +Date: Sat, 15 Jan 2011 12:46:03 +0000 +Subject: MIPS: Get kernel parameters from kexec-tools + +Before, we simply use the command lines from the original bootloader, +but it is not convenient. Now, we accept the kernel parameters from the +--command-line or --append option of the kexec-tools. But If not +--command-line or --apend option indicated, will fall back to use the +ones from the original bootloader. + +Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> +--- +--- a/arch/mips/kernel/machine_kexec.c ++++ b/arch/mips/kernel/machine_kexec.c +@@ -13,6 +13,7 @@ + #include <asm/bootinfo.h> + #include <asm/cacheflush.h> + #include <asm/page.h> ++#include <asm/uaccess.h> + + int (*_machine_kexec_prepare)(struct kimage *) = NULL; + void (*_machine_kexec_shutdown)(void) = NULL; +@@ -35,6 +36,56 @@ static void machine_kexec_init_args(void + pr_info("kexec_args[3] (desc): %p\n", (void *)kexec_args[3]); + } + ++#define ARGV_MAX_ARGS (COMMAND_LINE_SIZE / 15) ++ ++int machine_kexec_pass_args(struct kimage *image) ++{ ++ int i, argc = 0; ++ char *bootloader = "kexec"; ++ int *kexec_argv = (int *)kexec_args[1]; ++ ++ for (i = 0; i < image->nr_segments; i++) { ++ if (!strncmp(bootloader, (char *)image->segment[i].buf, ++ strlen(bootloader))) { ++ /* ++ * convert command line string to array ++ * of parameters (as bootloader does). ++ */ ++ /* ++ * Note: we do treat the 1st string "kexec" as an ++ * argument ;-) so, argc here is 1. ++ */ ++ char *str = (char *)image->segment[i].buf; ++ char *ptr = strchr(str, ' '); ++ char *kbuf = (char *)kexec_argv[0]; ++ /* Whenever --command-line or --append used, "kexec" is copied */ ++ argc = 1; ++ /* Parse the offset */ ++ while (ptr && (ARGV_MAX_ARGS > argc)) { ++ *ptr = '\0'; ++ if (ptr[1] != ' ' && ptr[1] != '\0') { ++ int offt = (int)(ptr - str + 1); ++ kexec_argv[argc] = (int)kbuf + offt; ++ argc++; ++ } ++ ptr = strchr(ptr + 1, ' '); ++ } ++ if (argc > 1) { ++ /* Copy to kernel space */ ++ copy_from_user(kbuf, (char *)image->segment[i].buf, image->segment[i].bufsz); ++ fw_arg0 = kexec_args[0] = argc; ++ } ++ break; ++ } ++ } ++ ++ pr_info("argc = %lu\n", kexec_args[0]); ++ for (i = 0; i < kexec_args[0]; i++) ++ pr_info("argv[%d] = %p, %s\n", i, (char *)kexec_argv[i], (char *)kexec_argv[i]); ++ ++ return 0; ++} ++ + int + machine_kexec_prepare(struct kimage *kimage) + { +@@ -45,6 +96,7 @@ machine_kexec_prepare(struct kimage *kim + * This can be overrided by _machine_kexec_prepare(). + */ + machine_kexec_init_args(); ++ machine_kexec_pass_args(kimage); + + if (_machine_kexec_prepare) + return _machine_kexec_prepare(kimage); |