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...@gmail.com>
Acked-by: Simon Glass <s...@chromium.org>
---
Changes in v3: None
Changes in v2:
- Use ARRAY_SIZE to indicate the maximum number of HOB tyeps
- Remove some unnecessary spaces in the do_hob command output
arch/x86/lib/Makefile | 1 +
arch/x86/lib/cmd_hob.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 68 insertions(+)
create mode 100644 arch/x86/lib/cmd_hob.c
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 55de788..73262d7 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -10,6 +10,7 @@ obj-y += bios_asm.o
obj-y += bios_interrupts.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-y += cmd_boot.o
+obj-$(CONFIG_HAVE_FSP) += cmd_hob.o
obj-y += gcc.o
obj-y += init_helpers.o
obj-y += interrupts.o
diff --git a/arch/x86/lib/cmd_hob.c b/arch/x86/lib/cmd_hob.c
new file mode 100644
index 0000000..2fdff2b
--- /dev/null
+++ b/arch/x86/lib/cmd_hob.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2014, Bin Meng <bmeng...@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",
+ ""
+);
--
1.8.2.1
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