u-boot/cmd/efi.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

256 lines
6.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#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]"
);