diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/x86/16bit/entry16.ld | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/src/cpu/x86/16bit/entry16.ld b/src/cpu/x86/16bit/entry16.ld index 66bfbd58ca..b5c1592691 100644 --- a/src/cpu/x86/16bit/entry16.ld +++ b/src/cpu/x86/16bit/entry16.ld @@ -1,3 +1,23 @@ - gdtptr16_offset = gdtptr16 & 0xffff; - nullidt_offset = nullidt & 0xffff; - ap_sipi_vector_in_rom = (_start16bit >> 12) & 0xff; +/* + * This file is part of the coreboot project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +gdtptr16_offset = gdtptr16 & 0xffff; +nullidt_offset = nullidt & 0xffff; + +/* Symbol _start16bit must be aligned to 4kB to start AP CPUs with + * Startup IPI message without RAM. + */ +#if CONFIG(SIPI_VECTOR_IN_ROM) +_bogus = ASSERT((_start16bit & 0xfff) == 0, "Symbol _start16bit is not at 4 KiB boundary"); +ap_sipi_vector_in_rom = (_start16bit >> 12) & 0xff; +#endif |