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x86: Add a simple command to show FSP HOB information

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FSP builds a series of data structures called the Hand-Off-Blocks
(HOBs) as it progresses through initializing the silicon. These data
structures conform to the HOB format as described in the Platform
Initialization (PI) specification Volume 3 Shared Architectual
Elements specification, which is part of the UEFI specification.

Create a simple command to parse the HOB list to display the HOB
address, type and length in bytes.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2014-12-12 21:05:32 +08:00 • committed by Simon Glass
parent bceb9f0fc8
commit ba7b38a529
2 changed files with 68 additions and 0 deletions
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1
arch/x86/lib/Makefile
View file

@ -10,6 +10,7 @@ obj-y += bios_asm.o
obj-y += bios_interrupts.o obj-y += bios_interrupts.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-y += cmd_boot.o obj-y += cmd_boot.o
obj-$(CONFIG_HAVE_FSP) += cmd_hob.o
obj-y += gcc.o obj-y += gcc.o
obj-y += init_helpers.o obj-y += init_helpers.o
obj-y += interrupts.o obj-y += interrupts.o

67
arch/x86/lib/cmd_hob.c Normal file
View file

@ -0,0 +1,67 @@
/*
* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <linux/compiler.h>
#include <asm/arch/fsp/fsp_support.h>
DECLARE_GLOBAL_DATA_PTR;
static char *hob_type[] = {
"reserved",
"Hand-off",
"Memory Allocation",
"Resource Descriptor",
"GUID Extension",
"Firmware Volumn",
"CPU",
"Memory Pool",
"reserved",
"Firmware Volumn 2",
"Load PEIM Unused",
"UEFI Capsule",
};
int do_hob(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
union hob_pointers_t hob;
u16 type;
char *desc;
int i = 0;
hob.raw = (u8 *)gd->arch.hob_list;
printf("HOB list address: 0x%08x\n\n", (unsigned int)hob.raw);
printf("No. | Address | Type | Length in Bytes\n");
printf("----|----------|---------------------|----------------\n");
while (!END_OF_HOB(hob)) {
printf("%-3d | %08x | ", i, (unsigned int)hob.raw);
type = hob.hdr->type;
if (type == HOB_TYPE_UNUSED)
desc = "*Unused*";
else if (type == HOB_TYPE_EOH)
desc = "**END OF HOB**";
else if (type >= 0 && type <= ARRAY_SIZE(hob_type))
desc = hob_type[type];
else
desc = "!!!Invalid Type!!!";
printf("%-19s | %-15d\n", desc, hob.hdr->len);
hob.raw = GET_NEXT_HOB(hob);
i++;
}
return 0;
}
/* -------------------------------------------------------------------- */
U_BOOT_CMD(
hob, 1, 1, do_hob,
"print FSP Hand-Off Block information",
""
);