1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * (C) Copyright 2008 4 * Niklaus Giger, niklaus.giger@member.fsf.org 5 */ 6 7#ifndef _VXWORKS_H_ 8#define _VXWORKS_H_ 9 10#include <efi_api.h> 11 12/* Use Linux compatible standard DTB */ 13#define VXWORKS_SYSFLG_STD_DTB 0x1 14 15/* 16 * Physical address of memory base for VxWorks x86 17 * This is LOCAL_MEM_LOCAL_ADRS in the VxWorks kernel configuration. 18 */ 19#define VXWORKS_PHYS_MEM_BASE 0x100000 20 21/* x86 bootline offset relative to LOCAL_MEM_LOCAL_ADRS in VxWorks */ 22#define X86_BOOT_LINE_OFFSET 0x1200 23 24/* 25 * VxWorks x86 E820 related stuff 26 * 27 * VxWorks on x86 gets E820 information from pre-defined offset @ 28 * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined 29 * by VxWorks and the actual E820 table entries starts from 0x4000. 30 * As defined by the BIOS E820 spec, the maximum number of E820 table 31 * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20 32 * = 2560 (0xa00) bytes in total. That's where VxWorks stores some 33 * information that is retrieved from the BIOS E820 call and saved 34 * later for sanity test during the kernel boot-up. 35 */ 36#define E820_DATA_OFFSET 0x4000 37#define E820_INFO_OFFSET 0x4a00 38 39/* E820 info signatiure "SMAP" - System MAP */ 40#define E820_SIGNATURE 0x534d4150 41 42struct e820_info { 43 u32 sign; /* "SMAP" signature */ 44 u32 x0; /* don't care, used by VxWorks */ 45 u32 x1; /* don't care, used by VxWorks */ 46 u32 x2; /* don't care, used by VxWorks */ 47 u32 addr; /* last e820 table entry addr */ 48 u32 x3; /* don't care, used by VxWorks */ 49 u32 entries; /* e820 table entry count */ 50 u32 error; /* must be zero */ 51}; 52 53/* 54 * VxWorks bootloader stores its size at a pre-defined offset @ 0x5004. 55 * Later when VxWorks kernel boots up and system memory information is 56 * retrieved from the E820 table, the bootloader size will be subtracted 57 * from the total system memory size to calculate the size of available 58 * memory for the OS. 59 */ 60#define BOOT_IMAGE_SIZE_OFFSET 0x5004 61 62/* 63 * When booting from EFI BIOS, VxWorks bootloader stores the EFI GOP 64 * framebuffer info at a pre-defined offset @ 0x6100. When VxWorks kernel 65 * boots up, its EFI console driver tries to find such a block and if 66 * the signature matches, the framebuffer information will be used to 67 * initialize the driver. 68 * 69 * However it is not necessary to prepare an EFI environment for VxWorks's 70 * EFI console driver to function (eg: EFI loader in U-Boot). If U-Boot has 71 * already initialized the graphics card and set it to a VESA mode that is 72 * compatible with EFI GOP, we can simply prepare such a block for VxWorks. 73 */ 74#define EFI_GOP_INFO_OFFSET 0x6100 75 76/* EFI GOP info signatiure */ 77#define EFI_GOP_INFO_MAGIC 0xfeedface 78 79struct efi_gop_info { 80 u32 magic; /* signature */ 81 struct efi_gop_mode_info info; /* EFI GOP mode info structure */ 82 phys_addr_t fb_base; /* framebuffer base address */ 83 u32 fb_size; /* framebuffer size */ 84}; 85 86int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); 87void boot_prep_vxworks(bootm_headers_t *images); 88void boot_jump_vxworks(bootm_headers_t *images); 89 90#endif 91