diff options
Diffstat (limited to 'include/vxworks.h')
| -rw-r--r-- | include/vxworks.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/vxworks.h b/include/vxworks.h index 297a70f..f69b008 100644 --- a/include/vxworks.h +++ b/include/vxworks.h @@ -8,6 +8,35 @@ #ifndef _VXWORKS_H_ #define _VXWORKS_H_ +/* + * VxWorks x86 E820 related stuff + * + * VxWorks on x86 gets E820 information from pre-defined address @ + * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined + * by VxWorks and the actual E820 table entries starts from 0x4000. + * As defined by the BIOS E820 spec, the maximum number of E820 table + * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20 + * = 2560 (0xa00) bytes in total. That's where VxWorks stores some + * information that is retrieved from the BIOS E820 call and saved + * later for sanity test during the kernel boot-up. + */ +#define VXWORKS_E820_DATA_ADDR 0x4000 +#define VXWORKS_E820_INFO_ADDR 0x4a00 + +/* E820 info signatiure "SMAP" - System MAP */ +#define E820_SIGNATURE 0x534d4150 + +struct e820info { + u32 sign; /* "SMAP" signature */ + u32 x0; /* don't care, used by VxWorks */ + u32 x1; /* don't care, used by VxWorks */ + u32 x2; /* don't care, used by VxWorks */ + u32 addr; /* last e820 table entry addr */ + u32 x3; /* don't care, used by VxWorks */ + u32 entries; /* e820 table entry count */ + u32 error; /* must be zero */ +}; + int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); void boot_prep_vxworks(bootm_headers_t *images); void boot_jump_vxworks(bootm_headers_t *images); |