mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 08:31:03 +00:00
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
/*
|
|
* (C) Copyright 2008
|
|
* Niklaus Giger, niklaus.giger@member.fsf.org
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _VXWORKS_H_
|
|
#define _VXWORKS_H_
|
|
|
|
/*
|
|
* VxWorks x86 E820 related stuff
|
|
*
|
|
* VxWorks on x86 gets E820 information from pre-defined address @
|
|
* 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
|
|
* by VxWorks and the actual E820 table entries starts from 0x4000.
|
|
* As defined by the BIOS E820 spec, the maximum number of E820 table
|
|
* entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
|
|
* = 2560 (0xa00) bytes in total. That's where VxWorks stores some
|
|
* information that is retrieved from the BIOS E820 call and saved
|
|
* later for sanity test during the kernel boot-up.
|
|
*/
|
|
#define VXWORKS_E820_DATA_ADDR 0x4000
|
|
#define VXWORKS_E820_INFO_ADDR 0x4a00
|
|
|
|
/* E820 info signatiure "SMAP" - System MAP */
|
|
#define E820_SIGNATURE 0x534d4150
|
|
|
|
struct e820info {
|
|
u32 sign; /* "SMAP" signature */
|
|
u32 x0; /* don't care, used by VxWorks */
|
|
u32 x1; /* don't care, used by VxWorks */
|
|
u32 x2; /* don't care, used by VxWorks */
|
|
u32 addr; /* last e820 table entry addr */
|
|
u32 x3; /* don't care, used by VxWorks */
|
|
u32 entries; /* e820 table entry count */
|
|
u32 error; /* must be zero */
|
|
};
|
|
|
|
int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
|
|
void boot_prep_vxworks(bootm_headers_t *images);
|
|
void boot_jump_vxworks(bootm_headers_t *images);
|
|
void do_bootvx_fdt(bootm_headers_t *images);
|
|
|
|
#endif
|