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 struct bootm_headers; 13 struct cmd_tbl; 14 15 /* Use Linux compatible standard DTB */ 16 #define VXWORKS_SYSFLG_STD_DTB 0x1 17 18 /* 19 * Physical address of memory base for VxWorks x86 20 * This is LOCAL_MEM_LOCAL_ADRS in the VxWorks kernel configuration. 21 */ 22 #define VXWORKS_PHYS_MEM_BASE 0x100000 23 24 /* x86 bootline offset relative to LOCAL_MEM_LOCAL_ADRS in VxWorks */ 25 #define X86_BOOT_LINE_OFFSET 0x1200 26 27 /* 28 * VxWorks x86 E820 related stuff 29 * 30 * VxWorks on x86 gets E820 information from pre-defined offset @ 31 * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined 32 * by VxWorks and the actual E820 table entries starts from 0x4000. 33 * As defined by the BIOS E820 spec, the maximum number of E820 table 34 * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20 35 * = 2560 (0xa00) bytes in total. That's where VxWorks stores some 36 * information that is retrieved from the BIOS E820 call and saved 37 * later for sanity test during the kernel boot-up. 38 */ 39 #define E820_DATA_OFFSET 0x4000 40 #define E820_INFO_OFFSET 0x4a00 41 42 /* E820 info signatiure "SMAP" - System MAP */ 43 #define E820_SIGNATURE 0x534d4150 44 45 struct e820_info { 46 u32 sign; /* "SMAP" signature */ 47 u32 x0; /* don't care, used by VxWorks */ 48 u32 x1; /* don't care, used by VxWorks */ 49 u32 x2; /* don't care, used by VxWorks */ 50 u32 addr; /* last e820 table entry addr */ 51 u32 x3; /* don't care, used by VxWorks */ 52 u32 entries; /* e820 table entry count */ 53 u32 error; /* must be zero */ 54 }; 55 56 /* 57 * VxWorks bootloader stores its size at a pre-defined offset @ 0x5004. 58 * Later when VxWorks kernel boots up and system memory information is 59 * retrieved from the E820 table, the bootloader size will be subtracted 60 * from the total system memory size to calculate the size of available 61 * memory for the OS. 62 */ 63 #define BOOT_IMAGE_SIZE_OFFSET 0x5004 64 65 /* 66 * When booting from EFI BIOS, VxWorks bootloader stores the EFI GOP 67 * framebuffer info at a pre-defined offset @ 0x6100. When VxWorks kernel 68 * boots up, its EFI console driver tries to find such a block and if 69 * the signature matches, the framebuffer information will be used to 70 * initialize the driver. 71 * 72 * However it is not necessary to prepare an EFI environment for VxWorks's 73 * EFI console driver to function (eg: EFI loader in U-Boot). If U-Boot has 74 * already initialized the graphics card and set it to a VESA mode that is 75 * compatible with EFI GOP, we can simply prepare such a block for VxWorks. 76 */ 77 #define EFI_GOP_INFO_OFFSET 0x6100 78 79 /* EFI GOP info signatiure */ 80 #define EFI_GOP_INFO_MAGIC 0xfeedface 81 82 struct efi_gop_info { 83 u32 magic; /* signature */ 84 struct efi_gop_mode_info info; /* EFI GOP mode info structure */ 85 phys_addr_t fb_base; /* framebuffer base address */ 86 u32 fb_size; /* framebuffer size */ 87 }; 88 89 int do_bootvx(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]); 90 void boot_prep_vxworks(struct bootm_headers *images); 91 void boot_jump_vxworks(struct bootm_headers *images); 92 93 #endif 94