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https://github.com/AsahiLinux/u-boot
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b90ff0fdaa
E820 is critical to the kernel as it provides system memory map information. Pass it to an x86 VxWorks kernel. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com> Tested-by: Jian Luo <jian.luo4@boschrexroth.de>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
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* (C) Copyright 2008
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* Niklaus Giger, niklaus.giger@member.fsf.org
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _VXWORKS_H_
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#define _VXWORKS_H_
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/*
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* VxWorks x86 E820 related stuff
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*
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* VxWorks on x86 gets E820 information from pre-defined address @
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* 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
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* by VxWorks and the actual E820 table entries starts from 0x4000.
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* As defined by the BIOS E820 spec, the maximum number of E820 table
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* entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
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* = 2560 (0xa00) bytes in total. That's where VxWorks stores some
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* information that is retrieved from the BIOS E820 call and saved
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* later for sanity test during the kernel boot-up.
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*/
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#define VXWORKS_E820_DATA_ADDR 0x4000
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#define VXWORKS_E820_INFO_ADDR 0x4a00
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/* E820 info signatiure "SMAP" - System MAP */
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#define E820_SIGNATURE 0x534d4150
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struct e820info {
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u32 sign; /* "SMAP" signature */
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u32 x0; /* don't care, used by VxWorks */
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u32 x1; /* don't care, used by VxWorks */
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u32 x2; /* don't care, used by VxWorks */
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u32 addr; /* last e820 table entry addr */
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u32 x3; /* don't care, used by VxWorks */
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u32 entries; /* e820 table entry count */
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u32 error; /* must be zero */
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};
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int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
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void boot_prep_vxworks(bootm_headers_t *images);
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void boot_jump_vxworks(bootm_headers_t *images);
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void do_bootvx_fdt(bootm_headers_t *images);
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#endif
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