1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * (C) Copyright 2008 3*4882a593Smuzhiyun * Niklaus Giger, niklaus.giger@member.fsf.org 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef _VXWORKS_H_ 9*4882a593Smuzhiyun #define _VXWORKS_H_ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun /* 12*4882a593Smuzhiyun * VxWorks x86 E820 related stuff 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * VxWorks on x86 gets E820 information from pre-defined address @ 15*4882a593Smuzhiyun * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined 16*4882a593Smuzhiyun * by VxWorks and the actual E820 table entries starts from 0x4000. 17*4882a593Smuzhiyun * As defined by the BIOS E820 spec, the maximum number of E820 table 18*4882a593Smuzhiyun * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20 19*4882a593Smuzhiyun * = 2560 (0xa00) bytes in total. That's where VxWorks stores some 20*4882a593Smuzhiyun * information that is retrieved from the BIOS E820 call and saved 21*4882a593Smuzhiyun * later for sanity test during the kernel boot-up. 22*4882a593Smuzhiyun */ 23*4882a593Smuzhiyun #define VXWORKS_E820_DATA_ADDR 0x4000 24*4882a593Smuzhiyun #define VXWORKS_E820_INFO_ADDR 0x4a00 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun /* E820 info signatiure "SMAP" - System MAP */ 27*4882a593Smuzhiyun #define E820_SIGNATURE 0x534d4150 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun struct e820info { 30*4882a593Smuzhiyun u32 sign; /* "SMAP" signature */ 31*4882a593Smuzhiyun u32 x0; /* don't care, used by VxWorks */ 32*4882a593Smuzhiyun u32 x1; /* don't care, used by VxWorks */ 33*4882a593Smuzhiyun u32 x2; /* don't care, used by VxWorks */ 34*4882a593Smuzhiyun u32 addr; /* last e820 table entry addr */ 35*4882a593Smuzhiyun u32 x3; /* don't care, used by VxWorks */ 36*4882a593Smuzhiyun u32 entries; /* e820 table entry count */ 37*4882a593Smuzhiyun u32 error; /* must be zero */ 38*4882a593Smuzhiyun }; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 41*4882a593Smuzhiyun void boot_prep_vxworks(bootm_headers_t *images); 42*4882a593Smuzhiyun void boot_jump_vxworks(bootm_headers_t *images); 43*4882a593Smuzhiyun void do_bootvx_fdt(bootm_headers_t *images); 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #endif 46