mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
efi: Add a command to display the memory map
The EFI memory map is passed from the stub to U-Boot in a table. Add a command to display it in a vaguely readable fashion. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested on QEMU Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
parent
16c220d0a7
commit
f1a0bafb58
2 changed files with 258 additions and 0 deletions
|
|
@ -90,6 +90,7 @@ obj-$(CONFIG_CMD_DTT) += cmd_dtt.o
|
|||
obj-$(CONFIG_CMD_ECHO) += cmd_echo.o
|
||||
obj-$(CONFIG_ENV_IS_IN_EEPROM) += cmd_eeprom.o
|
||||
obj-$(CONFIG_CMD_EEPROM) += cmd_eeprom.o
|
||||
obj-$(CONFIG_EFI_STUB) += cmd_efi.o
|
||||
obj-$(CONFIG_CMD_ELF) += cmd_elf.o
|
||||
obj-$(CONFIG_SYS_HUSH_PARSER) += cmd_exit.o
|
||||
obj-$(CONFIG_CMD_EXT4) += cmd_ext4.o
|
||||
|
|
|
|||
257
common/cmd_efi.c
Normal file
257
common/cmd_efi.c
Normal file
|
|
@ -0,0 +1,257 @@
|
|||
/*
|
||||
* (C) Copyright 2015 Google, Inc
|
||||
* Written by Simon Glass <sjg@chromium.org>
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-2.0+
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
#include <command.h>
|
||||
#include <efi.h>
|
||||
#include <errno.h>
|
||||
#include <malloc.h>
|
||||
|
||||
static const char *const type_name[] = {
|
||||
"reserved",
|
||||
"loader_code",
|
||||
"loader_data",
|
||||
"bs_code",
|
||||
"bs_data",
|
||||
"rt_code",
|
||||
"rt_data",
|
||||
"conv",
|
||||
"unusable",
|
||||
"acpi_reclaim",
|
||||
"acpi_nvs",
|
||||
"io",
|
||||
"io_port",
|
||||
"pal_code",
|
||||
};
|
||||
|
||||
static struct attr_info {
|
||||
int shift;
|
||||
const char *name;
|
||||
} mem_attr[] = {
|
||||
{ EFI_MEMORY_UC_SHIFT, "uncached" },
|
||||
{ EFI_MEMORY_WC_SHIFT, "write-coalescing" },
|
||||
{ EFI_MEMORY_WT_SHIFT, "write-through" },
|
||||
{ EFI_MEMORY_WB_SHIFT, "write-back" },
|
||||
{ EFI_MEMORY_UCE_SHIFT, "uncached & exported" },
|
||||
{ EFI_MEMORY_WP_SHIFT, "write-protect" },
|
||||
{ EFI_MEMORY_RP_SHIFT, "read-protect" },
|
||||
{ EFI_MEMORY_XP_SHIFT, "execute-protect" },
|
||||
{ EFI_MEMORY_RUNTIME_SHIFT, "needs runtime mapping" }
|
||||
};
|
||||
|
||||
/* Maximum different attribute values we can track */
|
||||
#define ATTR_SEEN_MAX 30
|
||||
|
||||
static inline bool is_boot_services(int type)
|
||||
{
|
||||
return type == EFI_LOADER_CODE || type == EFI_LOADER_DATA ||
|
||||
type == EFI_BOOT_SERVICES_CODE ||
|
||||
type == EFI_BOOT_SERVICES_DATA;
|
||||
}
|
||||
|
||||
static int h_cmp_entry(const void *v1, const void *v2)
|
||||
{
|
||||
const struct efi_mem_desc *desc1 = v1;
|
||||
const struct efi_mem_desc *desc2 = v2;
|
||||
int64_t diff = desc1->physical_start - desc2->physical_start;
|
||||
|
||||
/*
|
||||
* Manually calculate the difference to avoid sign loss in the 64-bit
|
||||
* to 32-bit conversion
|
||||
*/
|
||||
return diff < 0 ? -1 : diff > 0 ? 1 : 0;
|
||||
}
|
||||
|
||||
void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs)
|
||||
{
|
||||
struct efi_mem_desc *desc, *end, *base, *dest, *prev;
|
||||
int count;
|
||||
u64 addr;
|
||||
|
||||
base = malloc(size + sizeof(*desc));
|
||||
if (!base) {
|
||||
debug("%s: Cannot allocate %#x bytes\n", __func__, size);
|
||||
return NULL;
|
||||
}
|
||||
end = (struct efi_mem_desc *)((ulong)map + size);
|
||||
count = ((ulong)end - (ulong)map->desc) / map->desc_size;
|
||||
memcpy(base, map->desc, (ulong)end - (ulong)map->desc);
|
||||
qsort(base, count, map->desc_size, h_cmp_entry);
|
||||
prev = NULL;
|
||||
addr = 0;
|
||||
dest = base;
|
||||
end = base + count;
|
||||
for (desc = base; desc < end; desc = efi_get_next_mem_desc(map, desc)) {
|
||||
bool merge = true;
|
||||
int type = desc->type;
|
||||
|
||||
if (skip_bs && is_boot_services(desc->type))
|
||||
type = EFI_CONVENTIONAL_MEMORY;
|
||||
|
||||
memcpy(dest, desc, map->desc_size);
|
||||
dest->type = type;
|
||||
if (!skip_bs || !prev)
|
||||
merge = false;
|
||||
else if (desc->physical_start != addr)
|
||||
merge = false;
|
||||
else if (type != EFI_CONVENTIONAL_MEMORY)
|
||||
merge = false;
|
||||
else if (prev->type != EFI_CONVENTIONAL_MEMORY)
|
||||
merge = false;
|
||||
|
||||
if (merge) {
|
||||
prev->num_pages += desc->num_pages;
|
||||
} else {
|
||||
prev = dest;
|
||||
dest = efi_get_next_mem_desc(map, dest);
|
||||
}
|
||||
addr = desc->physical_start + (desc->num_pages <<
|
||||
EFI_PAGE_SHIFT);
|
||||
}
|
||||
|
||||
/* Mark the end */
|
||||
dest->type = EFI_TABLE_END;
|
||||
|
||||
return base;
|
||||
}
|
||||
|
||||
static void efi_print_mem_table(struct efi_entry_memmap *map,
|
||||
struct efi_mem_desc *desc, bool skip_bs)
|
||||
{
|
||||
u64 attr_seen[ATTR_SEEN_MAX];
|
||||
int attr_seen_count;
|
||||
int upto, i;
|
||||
u64 addr;
|
||||
|
||||
printf(" # %-14s %10s %10s %10s %s\n", "Type", "Physical",
|
||||
"Virtual", "Size", "Attributes");
|
||||
|
||||
/* Keep track of all the different attributes we have seen */
|
||||
attr_seen_count = 0;
|
||||
addr = 0;
|
||||
for (upto = 0; desc->type != EFI_TABLE_END;
|
||||
upto++, desc = efi_get_next_mem_desc(map, desc)) {
|
||||
const char *name;
|
||||
u64 size;
|
||||
|
||||
if (skip_bs && is_boot_services(desc->type))
|
||||
continue;
|
||||
if (desc->physical_start != addr) {
|
||||
printf(" %-14s %010llx %10s %010llx\n", "<gap>",
|
||||
addr, "", desc->physical_start - addr);
|
||||
}
|
||||
size = desc->num_pages << EFI_PAGE_SHIFT;
|
||||
|
||||
name = desc->type < ARRAY_SIZE(type_name) ?
|
||||
type_name[desc->type] : "<invalid>";
|
||||
printf("%2d %x:%-12s %010llx %010llx %010llx ", upto,
|
||||
desc->type, name, desc->physical_start,
|
||||
desc->virtual_start, size);
|
||||
if (desc->attribute & EFI_MEMORY_RUNTIME)
|
||||
putc('r');
|
||||
printf("%llx", desc->attribute & ~EFI_MEMORY_RUNTIME);
|
||||
putc('\n');
|
||||
|
||||
for (i = 0; i < attr_seen_count; i++) {
|
||||
if (attr_seen[i] == desc->attribute)
|
||||
break;
|
||||
}
|
||||
if (i == attr_seen_count && i < ATTR_SEEN_MAX)
|
||||
attr_seen[attr_seen_count++] = desc->attribute;
|
||||
addr = desc->physical_start + size;
|
||||
}
|
||||
|
||||
printf("\nAttributes key:\n");
|
||||
for (i = 0; i < attr_seen_count; i++) {
|
||||
u64 attr = attr_seen[i];
|
||||
bool first;
|
||||
int j;
|
||||
|
||||
printf("%c%llx: ", attr & EFI_MEMORY_RUNTIME ? 'r' : ' ',
|
||||
attr & ~EFI_MEMORY_RUNTIME);
|
||||
for (j = 0, first = true; j < ARRAY_SIZE(mem_attr); j++) {
|
||||
if (attr & (1ULL << mem_attr[j].shift)) {
|
||||
if (first)
|
||||
first = false;
|
||||
else
|
||||
printf(", ");
|
||||
printf("%s", mem_attr[j].name);
|
||||
}
|
||||
}
|
||||
putc('\n');
|
||||
}
|
||||
if (skip_bs)
|
||||
printf("*Some areas are merged (use 'all' to see)\n");
|
||||
}
|
||||
|
||||
static int do_efi_mem(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
||||
{
|
||||
struct efi_mem_desc *desc;
|
||||
struct efi_entry_memmap *map;
|
||||
int size, ret;
|
||||
bool skip_bs;
|
||||
|
||||
skip_bs = !argc || *argv[0] != 'a';
|
||||
ret = efi_info_get(EFIET_MEMORY_MAP, (void **)&map, &size);
|
||||
switch (ret) {
|
||||
case -ENOENT:
|
||||
printf("No EFI table available\n");
|
||||
goto done;
|
||||
case -EPROTONOSUPPORT:
|
||||
printf("Incorrect EFI table version\n");
|
||||
goto done;
|
||||
}
|
||||
printf("EFI table at %lx, memory map %p, size %x, version %x, descr. size %#x\n",
|
||||
gd->arch.table, map, size, map->version, map->desc_size);
|
||||
if (map->version != EFI_MEM_DESC_VERSION) {
|
||||
printf("Incorrect memory map version\n");
|
||||
ret = -EPROTONOSUPPORT;
|
||||
goto done;
|
||||
}
|
||||
|
||||
desc = efi_build_mem_table(map, size, skip_bs);
|
||||
if (!desc) {
|
||||
ret = -ENOMEM;
|
||||
goto done;
|
||||
}
|
||||
|
||||
efi_print_mem_table(map, desc, skip_bs);
|
||||
free(desc);
|
||||
done:
|
||||
if (ret)
|
||||
printf("Error: %d\n", ret);
|
||||
|
||||
return ret ? CMD_RET_FAILURE : 0;
|
||||
}
|
||||
|
||||
static cmd_tbl_t efi_commands[] = {
|
||||
U_BOOT_CMD_MKENT(mem, 1, 1, do_efi_mem, "", ""),
|
||||
};
|
||||
|
||||
static int do_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
||||
{
|
||||
cmd_tbl_t *efi_cmd;
|
||||
int ret;
|
||||
|
||||
if (argc < 2)
|
||||
return CMD_RET_USAGE;
|
||||
efi_cmd = find_cmd_tbl(argv[1], efi_commands, ARRAY_SIZE(efi_commands));
|
||||
argc -= 2;
|
||||
argv += 2;
|
||||
if (!efi_cmd || argc > efi_cmd->maxargs)
|
||||
return CMD_RET_USAGE;
|
||||
|
||||
ret = efi_cmd->cmd(efi_cmd, flag, argc, argv);
|
||||
|
||||
return cmd_process_error(efi_cmd, ret);
|
||||
}
|
||||
|
||||
U_BOOT_CMD(
|
||||
efi, 3, 1, do_efi,
|
||||
"EFI access",
|
||||
"mem [all] Dump memory information [include boot services]"
|
||||
);
|
||||
Loading…
Reference in a new issue