[U-Boot] [PATCH v6 7/7] cmd: efidebug: add memmap command
AKASHI Takahiro
takahiro.akashi at linaro.org
Wed Feb 20 00:53:25 UTC 2019
On Tue, Feb 19, 2019 at 08:11:05PM +0100, Heinrich Schuchardt wrote:
> On 1/24/19 12:04 PM, AKASHI Takahiro wrote:
> > "memmap" command prints uefi-specific memory map information.
> > => efi memmap
> > Type Start End Attributes
> > ================ ================ ================ ==========
> > CONVENTIONAL 0000000040000000-000000007de27000 WB
> > RUNTIME DATA 000000007de27000-000000007de28000 WB|RT
> > RESERVED 000000007de28000-000000007de2a000 WB
> > RUNTIME DATA 000000007de2a000-000000007de2b000 WB|RT
> > RESERVED 000000007de2b000-000000007de2c000 WB
> > RUNTIME DATA 000000007de2c000-000000007de2d000 WB|RT
> > LOADER DATA 000000007de2d000-000000007ff37000 WB
> > RUNTIME CODE 000000007ff37000-000000007ff38000 WB|RT
> > LOADER DATA 000000007ff38000-0000000080000000 WB
>
> On qemu_arm_defconfig I got this ouptut:
>
> => efidebug memmap
> Type Start End Attributes
> ================ ======== ======== ==========
> CONVENTIONAL 0000000040000000-000000007ddf8000 WB
> BOOT DATA 000000007ddf8000-000000007ddfd000 WB
> RUNTIME DATA 000000007ddfd000-000000007ddfe000 WB|RT
> RESERVED 000000007ddfe000-000000007ddff000 WB
> RUNTIME DATA 000000007ddff000-000000007de00000 WB|RT
> LOADER DATA 000000007de00000-000000007ff42000 WB
> RUNTIME CODE 000000007ff42000-000000007ff43000 WB|RT
> LOADER DATA 000000007ff43000-0000000080000000 WB
>
> Something is wrong with you format codes.
>
> >
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
> > ---
> > cmd/efidebug.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 99 insertions(+), 1 deletion(-)
> >
> > diff --git a/cmd/efidebug.c b/cmd/efidebug.c
> > index 81ab3654f746..39398669e18f 100644
> > --- a/cmd/efidebug.c
> > +++ b/cmd/efidebug.c
> > @@ -309,6 +309,100 @@ static int do_efi_show_images(cmd_tbl_t *cmdtp, int flag,
> > return CMD_RET_SUCCESS;
> > }
> >
> > +static const char * const efi_mem_type_string[] = {
> > + [EFI_RESERVED_MEMORY_TYPE] = "RESERVED",
> > + [EFI_LOADER_CODE] = "LOADER CODE",
> > + [EFI_LOADER_DATA] = "LOADER DATA",
> > + [EFI_BOOT_SERVICES_CODE] = "BOOT CODE",
> > + [EFI_BOOT_SERVICES_DATA] = "BOOT DATA",
> > + [EFI_RUNTIME_SERVICES_CODE] = "RUNTIME CODE",
> > + [EFI_RUNTIME_SERVICES_DATA] = "RUNTIME DATA",
> > + [EFI_CONVENTIONAL_MEMORY] = "CONVENTIONAL",
> > + [EFI_UNUSABLE_MEMORY] = "UNUSABLE MEM",
> > + [EFI_ACPI_RECLAIM_MEMORY] = "ACPI RECLAIM MEM",
> > + [EFI_ACPI_MEMORY_NVS] = "ACPI NVS",
> > + [EFI_MMAP_IO] = "IO",
> > + [EFI_MMAP_IO_PORT] = "IO PORT",
> > + [EFI_PAL_CODE] = "PAL",
> > +};
> > +
> > +static const struct efi_mem_attrs {
> > + const u64 bit;
> > + const char *text;
> > +} efi_mem_attrs[] = {
> > + {EFI_MEMORY_UC, "UC"},
> > + {EFI_MEMORY_UC, "UC"},
> > + {EFI_MEMORY_WC, "WC"},
> > + {EFI_MEMORY_WT, "WT"},
> > + {EFI_MEMORY_WB, "WB"},
> > + {EFI_MEMORY_UCE, "UCE"},
> > + {EFI_MEMORY_WP, "WP"},
> > + {EFI_MEMORY_RP, "RP"},
> > + {EFI_MEMORY_XP, "WP"},
> > + {EFI_MEMORY_NV, "NV"},
> > + {EFI_MEMORY_MORE_RELIABLE, "REL"},
> > + {EFI_MEMORY_RO, "RO"},
> > + {EFI_MEMORY_RUNTIME, "RT"},
> > +};
> > +
> > +static void print_memory_attributes(u64 attributes)
> > +{
> > + int sep, i;
> > +
> > + for (sep = 0, i = 0; i < ARRAY_SIZE(efi_mem_attrs); i++)
> > + if (attributes & efi_mem_attrs[i].bit) {
> > + if (sep) {
> > + putc('|');
> > + } else {
> > + putc(' ');
> > + sep = 1;
> > + }
> > + puts(efi_mem_attrs[i].text);
> > + }
> > +}
> > +
> > +static int do_efi_show_memmap(cmd_tbl_t *cmdtp, int flag,
> > + int argc, char * const argv[])
> > +{
> > + struct efi_mem_desc *memmap = NULL, *map;
> > + efi_uintn_t map_size = 0;
> > + const char *type;
> > + int i;
> > + efi_status_t ret;
> > +
> > + ret = efi_get_memory_map(&map_size, memmap, NULL, NULL, NULL);
> > + if (ret == EFI_BUFFER_TOO_SMALL) {
> > + memmap = malloc(map_size);
> > + if (!memmap)
> > + return CMD_RET_FAILURE;
> > + ret = efi_get_memory_map(&map_size, memmap, NULL, NULL, NULL);
> > + }
> > + if (ret != EFI_SUCCESS) {
> > + free(memmap);
> > + return CMD_RET_FAILURE;
> > + }
> > +
> > + printf("Type Start%.*s End%.*s Attributes\n",
> > + EFI_HANDLE_WIDTH - 5, spc, EFI_HANDLE_WIDTH - 3, spc);
> > + printf("================ %.*s %.*s ==========\n",
> > + EFI_HANDLE_WIDTH, sep, EFI_HANDLE_WIDTH, sep);
> > + for (i = 0, map = memmap; i < map_size / sizeof(*map); map++, i++) {
> > + if (map->type < EFI_MAX_MEMORY_TYPE)
> > + type = efi_mem_type_string[map->type];
> > + else
> > + type = "(unknown)";
> > + printf("%-16s %016llx-%016llx", type, map->physical_start,
>
> Width 16 is ok on 64bit systems but not on 32bit ones.
It sounds reasonable, but the reality is not so trivial.
In struct efi_mem_desc, physical_start is defined as efi_physical_addr_t,
and efi_physical_addr_t is defined as u64 whatever the arch is.
So how do we know the system has 64-bit address space?
There is a config, CONFIG_PHYS_64BIT, but it is never defined on x86(_64).
So workable but ugly solution to meet your requirement would be
a)
if (sizeof(phys_addr_t) >= 8)
printf("%-16s %016llx-%016llx", ...);
else
printf("%-16s %08llx-%08llx", ...);
or
b)
printf("%-16s %p-%p", type, (void *)map->physical_start, ...);
(I don't think "void *" always reflects *physical* bit width
on LPAE arch though.)
Which do you like better?
Thanks,
-Takahiro Akashi
> Best regards
>
> Heinrich
>
> > + map->physical_start + map->num_pages * EFI_PAGE_SIZE);
> > +
> > + print_memory_attributes(map->attribute);
> > + putc('\n');
> > + }
> > +
> > + free(memmap);
> > +
> > + return CMD_RET_SUCCESS;
> > +}
> > +
> > static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
> > int argc, char * const argv[])
> > {
> > @@ -708,6 +802,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = {
> > "", ""),
> > U_BOOT_CMD_MKENT(images, CONFIG_SYS_MAXARGS, 1, do_efi_show_images,
> > "", ""),
> > + U_BOOT_CMD_MKENT(memmap, CONFIG_SYS_MAXARGS, 1, do_efi_show_memmap,
> > + "", ""),
> > };
> >
> > /* Interpreter command to configure UEFI environment */
> > @@ -761,7 +857,9 @@ static char efidebug_help_text[] =
> > "efidebug dh\n"
> > " - show uefi handles\n"
> > "efidebug images\n"
> > - " - show loaded images\n";
> > + " - show loaded images\n"
> > + "efidebug memmap\n"
> > + " - show uefi memory map\n";
> > #endif
> >
> > U_BOOT_CMD(
> >
>
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