diff options
Diffstat (limited to 'target/linux/ixp4xx/patches-2.6.23/096-kexec_cmdline.patch')
| -rw-r--r-- | target/linux/ixp4xx/patches-2.6.23/096-kexec_cmdline.patch | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/target/linux/ixp4xx/patches-2.6.23/096-kexec_cmdline.patch b/target/linux/ixp4xx/patches-2.6.23/096-kexec_cmdline.patch new file mode 100644 index 0000000000..45ca2038f0 --- /dev/null +++ b/target/linux/ixp4xx/patches-2.6.23/096-kexec_cmdline.patch @@ -0,0 +1,178 @@ +diff -uprN linux-2.6.23.orig/kernel/ksysfs.c linux-2.6.23/kernel/ksysfs.c +--- linux-2.6.23.orig/kernel/ksysfs.c 2007-10-09 15:31:38.000000000 -0500 ++++ linux-2.6.23/kernel/ksysfs.c 2007-10-11 01:10:26.000000000 -0500 +@@ -49,6 +49,165 @@ KERNEL_ATTR_RW(uevent_helper); + #endif + + #ifdef CONFIG_KEXEC ++ ++#include <asm/setup.h> ++ ++extern unsigned long kexec_boot_params; ++ ++char kexec_cmdline[COMMAND_LINE_SIZE] = ""; ++ ++static void ++replace_cmdline_tag(void) ++{ ++ char *t; ++ struct tag *real; ++ struct tag *copy; ++ struct tag *rend; ++ int i; ++ ++/* TODO: check the return params */ ++ t = kmalloc(KEXEC_BOOT_PARAMS_SIZE + COMMAND_LINE_SIZE, GFP_KERNEL); ++ memset((void *)t, 0, KEXEC_BOOT_PARAMS_SIZE + COMMAND_LINE_SIZE); ++ ++/* TODO: validate that the boot params are ATAGS, in fact */ ++ ++ copy = (struct tag *)t; ++ real = (struct tag *)kexec_boot_params; ++ rend = (struct tag *)(kexec_boot_params + KEXEC_BOOT_PARAMS_SIZE); ++ while ((real->hdr.size) && (real < rend)) { ++ if (real->hdr.tag != ATAG_CMDLINE) { ++ memcpy((void *)copy, (void *)real, real->hdr.size * 4); ++ copy = tag_next(copy); ++ } ++ real = tag_next(real); ++ } ++ ++/* TODO: validate that we have enough space in the buffer */ ++ ++ i = strlen(kexec_cmdline); ++ if (i) { ++ copy->hdr.tag = ATAG_CMDLINE; ++ copy->hdr.size = (sizeof(struct tag_header) + i + 1 + 4) >> 2; ++ strcpy(copy->u.cmdline.cmdline, kexec_cmdline); ++ copy = tag_next(copy); ++ } ++ ++ copy->hdr.tag = ATAG_NONE; /* Empty tag ends list */ ++ copy->hdr.size = 0; /* zero length */ ++ ++/* TODO: validate that the temporary buffer isn't too full */ ++ ++ memcpy((void *)kexec_boot_params, (void *)t, KEXEC_BOOT_PARAMS_SIZE); ++ ++ kfree(t); /* Don't forget to free the big buffer we used */ ++} ++ ++static ssize_t kexec_cmdline_show(struct kset *kset, char *page) ++{ ++ return sprintf(page, "%s\n", kexec_cmdline); ++} ++ ++static ssize_t kexec_cmdline_store(struct kset *kset, const char *page, ++ size_t count) ++{ ++ if ((count + 1) > COMMAND_LINE_SIZE) ++ count = COMMAND_LINE_SIZE; ++ memcpy(kexec_cmdline, page, count); ++ kexec_cmdline[count] = '\0'; ++ if (count && (kexec_cmdline[count - 1] == '\n')) ++ kexec_cmdline[count - 1] = '\0'; ++ replace_cmdline_tag(); ++ return count; ++} ++KERNEL_ATTR_RW(kexec_cmdline); ++ ++static ssize_t kexec_boot_params_show(struct kset *kset, char *page) ++{ ++ unsigned long *p; ++ char buf[PAGE_SIZE]; ++ int keep_doing; ++ ++ p = (unsigned long *)kexec_boot_params; ++ ++ /* if this doesn't look like atags, just print first few words */ ++ if (p[1] != ATAG_CORE) ++ return sprintf(page, "0x%lx 0x%lx 0x%lx 0x%lx\n", ++ p[0], p[1], p[2], p[3]); ++ ++ /* carefully walk the atag list, and print out the structure */ ++ keep_doing = 1; ++ do { ++ switch (p[1]) { ++ case ATAG_CORE: ++ /* watch out, core tag is permitted to be empty */ ++ if (p[0] == 5) ++ sprintf(buf, ++ "CORE flg=%ld pgsz=%ld rdev=0x%lx\n", ++ p[2], p[3], p[4]); ++ else ++ sprintf(buf,"CORE\n"); ++ break; ++ case ATAG_MEM: ++ sprintf(buf,"MEM %ldM@0x%lx\n", p[2] / (1024 * 1024), ++ p[3]); ++ break; ++ case ATAG_VIDEOTEXT: ++ sprintf(buf,"VIDEOTEXT sz=%ld\n", p[0]); ++ break; ++ case ATAG_RAMDISK: ++ sprintf(buf,"RAMDISK prmpt=%ld %ldK@0x%lx\n", ++ p[2], p[3], p[4]); ++ break; ++ case ATAG_INITRD2: ++ sprintf(buf,"INITRD2 %ldK@0x%lx\n", p[3] / 1024, p[2]); ++ break; ++ case ATAG_SERIAL: ++ sprintf(buf,"SERIAL high=0x%08lx low=0x%08lx\n", ++ p[3], p[2]); ++ break; ++ case ATAG_REVISION: ++ sprintf(buf,"REVISION rev=%ld\n", p[2]); ++ break; ++ case ATAG_VIDEOLFB: ++ sprintf(buf,"VIDEOLFB sz=%ld\n", p[0]); ++ break; ++ case ATAG_CMDLINE: ++ sprintf(buf,"CMD \"%s\"\n", (char *)&p[2]); ++ break; ++ case ATAG_NONE: ++ sprintf(buf,"NONE\n"); ++ keep_doing = 0; ++ break; ++ default: ++ sprintf(buf,"-unknown- sz=%ld\n", p[0]); ++ break; ++ } ++ ++ /* carefully add to page */ ++ if ((strlen(buf) + strlen(page)) < PAGE_SIZE) { ++ strcat(page, buf); ++ } else { ++ keep_doing = 0; ++ } ++ ++ /* stop when we encounter a header length of 0 */ ++ if (p[0] == 0) ++ keep_doing = 0; ++ ++ /* go to the next tag */ ++ p += p[0]; ++ ++ /* stop if we walked off the end of the buffer */ ++ if (p > (unsigned long *)(kexec_boot_params + ++ KEXEC_BOOT_PARAMS_SIZE)) ++ keep_doing = 0; ++ ++ } while (keep_doing); ++ ++ return (strlen(page)); ++} ++KERNEL_ATTR_RO(kexec_boot_params); ++ + static ssize_t kexec_loaded_show(struct kset *kset, char *page) + { + return sprintf(page, "%d\n", !!kexec_image); +@@ -95,6 +254,8 @@ static struct attribute * kernel_attrs[] + #ifdef CONFIG_KEXEC + &kexec_loaded_attr.attr, + &kexec_crash_loaded_attr.attr, ++ &kexec_cmdline_attr.attr, ++ &kexec_boot_params_attr.attr, + #endif + NULL + }; |