projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 5dcd14ec PA |
1 | #ifndef _ASM_X86_BOOTPARAM_UTILS_H |
| 2 | #define _ASM_X86_BOOTPARAM_UTILS_H | |
| 3 | ||
| 4 | #include <asm/bootparam.h> | |
| 5 | ||
| 6 | /* | |
| 7 | * This file is included from multiple environments. Do not | |
| 8 | * add completing #includes to make it standalone. | |
| 9 | */ | |
| 10 | ||
| 11 | /* | |
| 12 | * Deal with bootloaders which fail to initialize unknown fields in | |
| 13 | * boot_params to zero. The list fields in this list are taken from | |
| 14 | * analysis of kexec-tools; if other broken bootloaders initialize a | |
| 15 | * different set of fields we will need to figure out how to disambiguate. | |
| 16 | * | |
| 17 | */ | |
| 18 | static void sanitize_boot_params(struct boot_params *boot_params) | |
| 19 | { | |
| 20 | if (boot_params->sentinel) { | |
| 21 | /*fields in boot_params are not valid, clear them */ | |
| 22 | memset(&boot_params->olpc_ofw_header, 0, | |
| 23 | (char *)&boot_params->alt_mem_k - | |
| 24 | (char *)&boot_params->olpc_ofw_header); | |
| 25 | memset(&boot_params->kbd_status, 0, | |
| 26 | (char *)&boot_params->hdr - | |
| 27 | (char *)&boot_params->kbd_status); | |
| 28 | memset(&boot_params->_pad7[0], 0, | |
| 29 | (char *)&boot_params->edd_mbr_sig_buffer[0] - | |
| 30 | (char *)&boot_params->_pad7[0]); | |
| 31 | memset(&boot_params->_pad8[0], 0, | |
| 32 | (char *)&boot_params->eddbuf[0] - | |
| 33 | (char *)&boot_params->_pad8[0]); | |
| 34 | memset(&boot_params->_pad9[0], 0, sizeof(boot_params->_pad9)); | |
| 35 | } | |
| 36 | } | |
| 37 | ||
| 38 | #endif /* _ASM_X86_BOOTPARAM_UTILS_H */ |