When bootstub get control, the memory map in DRAM is like
2012-10-17 10:59
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路径：src/device/intel/bootstub/head.S
* 0x1102000 | initrd | initrd will move to highest memory otherwise
*+bzImage size +-----------------------+ bzImage uncompressing will destory it
* | bzImage |
* 0x1102000 +-----------------------+
* | boot stub |
* 0x1101000 +-----------------------+
* | free space |
* | used as stack |
* 0x1100110 +-----------------------+
* | SPI0 or SPI1 | MIC need to fill it:
* | | 0x0: SPI0, 0x1: SPI1
* 0x110010c +-----------------------+
* | boot stub spi uart | MIC need to fill it:
* | suppression flag | 0x1 suppression, 0x0 default
* 0x1100108 +-----------------------+
* | initrd size | MIC need to fill it: initrd file size
* 0x1100104 +-----------------------+
* | bzImage size | MIC need to fill it: bzImage file size
* 0x1100100 +-----------------------+
* | kernel cmdline | MIC need to fill it
* 0x1100000 +-----------------------+
*/
* 0x1102000 | initrd | initrd will move to highest memory otherwise
*+bzImage size +-----------------------+ bzImage uncompressing will destory it
* | bzImage |
* 0x1102000 +-----------------------+
* | boot stub |
* 0x1101000 +-----------------------+
* | free space |
* | used as stack |
* 0x1100110 +-----------------------+
* | SPI0 or SPI1 | MIC need to fill it:
* | | 0x0: SPI0, 0x1: SPI1
* 0x110010c +-----------------------+
* | boot stub spi uart | MIC need to fill it:
* | suppression flag | 0x1 suppression, 0x0 default
* 0x1100108 +-----------------------+
* | initrd size | MIC need to fill it: initrd file size
* 0x1100104 +-----------------------+
* | bzImage size | MIC need to fill it: bzImage file size
* 0x1100100 +-----------------------+
* | kernel cmdline | MIC need to fill it
* 0x1100000 +-----------------------+
*/
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