3 * Niklaus Giger, niklaus.giger@member.fsf.org
5 * SPDX-License-Identifier: GPL-2.0+
12 * VxWorks x86 E820 related stuff
14 * VxWorks on x86 gets E820 information from pre-defined address @
15 * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
16 * by VxWorks and the actual E820 table entries starts from 0x4000.
17 * As defined by the BIOS E820 spec, the maximum number of E820 table
18 * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
19 * = 2560 (0xa00) bytes in total. That's where VxWorks stores some
20 * information that is retrieved from the BIOS E820 call and saved
21 * later for sanity test during the kernel boot-up.
23 #define VXWORKS_E820_DATA_ADDR 0x4000
24 #define VXWORKS_E820_INFO_ADDR 0x4a00
26 /* E820 info signatiure "SMAP" - System MAP */
27 #define E820_SIGNATURE 0x534d4150
30 u32 sign; /* "SMAP" signature */
31 u32 x0; /* don't care, used by VxWorks */
32 u32 x1; /* don't care, used by VxWorks */
33 u32 x2; /* don't care, used by VxWorks */
34 u32 addr; /* last e820 table entry addr */
35 u32 x3; /* don't care, used by VxWorks */
36 u32 entries; /* e820 table entry count */
37 u32 error; /* must be zero */
40 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
41 void boot_prep_vxworks(bootm_headers_t *images);
42 void boot_jump_vxworks(bootm_headers_t *images);
43 void do_bootvx_fdt(bootm_headers_t *images);