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Pull request efi-2025-04-rc5

Browse source 
UEFI:
 
 * Export _start symbol from crt0_*_efi stubs
 * Move .dynamic out of .text in EFI
 * scripts/Makefile.lib: Preserve the .dynstr section as well
 
 Documentation:
 
 * net: miiphybb: Convert documentation to rst
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Merge tag 'efi-2025-04-rc5' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2025-04-rc5

CI:

* https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/25196

UEFI:

* Export _start symbol from crt0_*_efi stubs
* Move .dynamic out of .text in EFI
* scripts/Makefile.lib: Preserve the .dynstr section as well

Documentation:

* net: miiphybb: Convert documentation to rst
This commit is contained in:
Tom Rini 2025-03-17 08:00:40 -06:00
commit 3e806c41aa
8 changed files with 84 additions and 44 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
arch/arm/lib/crt0_aarch64_efi.S
View file

@ -144,6 +144,7 @@ section_table:
IMAGE_SCN_CNT_INITIALIZED_DATA)
.align 12
.globl _start
_start:
stp x29, x30, [sp, #-32]!
mov x29, sp

1
arch/arm/lib/crt0_arm_efi.S
View file

@ -143,6 +143,7 @@ section_table:
IMAGE_SCN_CNT_INITIALIZED_DATA)
.align 12
.globl _start
_start:
stmfd sp!, {r0-r2, lr}

1
arch/riscv/lib/crt0_riscv_efi.S
View file

@ -179,6 +179,7 @@ section_table:
IMAGE_SCN_CNT_INITIALIZED_DATA)
.align 12
.globl _start
_start:
addi sp, sp, -(SIZE_LONG * 3)
SAVE_LONG(a0, 0)

39
doc/README.bitbangMII
View file

@ -1,39 +0,0 @@
This patch rewrites the miiphybb ( Bit-banged MII bus driver ) in order to
support an arbitrary number of mii buses. This feature is useful when your
board uses different mii buses for different phys and all (or a part) of these
buses are implemented via bit-banging mode.
The driver requires that the following macros should be defined into the board
configuration file:
CONFIG_BITBANGMII - Enable the miiphybb driver
The board code needs to fill the bb_miiphy_buses[] array with a record for
each required bus and declare the bb_miiphy_buses_num variable with the
number of mii buses. The record (struct bb_miiphy_bus) has the following
fields/callbacks (see miiphy.h for details):
char name[] - The symbolic name that must be equal to the MII bus
registered name
int (*init)() - Initialization function called at startup time (just
before the Ethernet initialization)
int (*mdio_active)() - Activate the MDIO pin as output
int (*mdio_tristate)() - Activate the MDIO pin as input/tristate pin
int (*set_mdio)() - Write the MDIO pin
int (*get_mdio)() - Read the MDIO pin
int (*set_mdc)() - Write the MDC pin
int (*delay)() - Delay function
void *priv - Private data used by board specific code
The board code will look like:
struct bb_miiphy_bus bb_miiphy_buses[] = {
{ .name = "miibus#1", .init = b1_init, .mdio_active = b1_mdio_active, ... },
{ .name = "miibus#2", .init = b2_init, .mdio_active = b2_mdio_active, ... },
...
};
int bb_miiphy_buses_num = sizeof(bb_miiphy_buses) /
sizeof(bb_miiphy_buses[0]);
2009 Industrie Dial Face S.p.A.
Luigi 'Comio' Mantellini <luigi.mantellini@idf-hit.com>

75
doc/develop/bitbangmii.rst Normal file
View file

@ -0,0 +1,75 @@
.. SPDX-License-Identifier: GPL-2.0-or-later
.. Luigi 'Comio' Mantellini <luigi.mantellini@idf-hit.com>, Industrie Dial Face S.p.A., 2009
Bit-banged MII bus support
==========================
The miiphybb ( Bit-banged MII bus driver ) supports an arbitrary number of
MII buses. This feature is useful when a driver uses different MII buses for
different PHYs and all (or a part) of these buses are implemented via
bit-banging mode.
The driver requires that the following macro is defined in the board
configuration file:
* CONFIG_BITBANGMII - Enable the miiphybb driver
The driver code needs to allocate a regular MDIO device using mdio_alloc()
and assign .read and .write accessors which wrap bb_miiphy_read() and
bb_miiphy_write() functions respectively. The bb_miiphy_read() and
bb_miiphy_write() functions take a pointer to a callback structure,
struct bb_miiphy_bus_ops. The struct bb_miiphy_bus_ops has the following
fields/callbacks (see miiphy.h for details):
.. code-block:: c
int (*mdio_active)() // Activate the MDIO pin as output
int (*mdio_tristate)() // Activate the MDIO pin as input/tristate pin
int (*set_mdio)() // Write the MDIO pin
int (*get_mdio)() // Read the MDIO pin
int (*set_mdc)() // Write the MDC pin
int (*delay)() // Delay function
The driver code will look like:
.. code-block:: c
static const struct bb_miiphy_bus_ops ravb_bb_miiphy_bus_ops = {
.mdio_active = ravb_bb_mdio_active,
.mdio_tristate = ravb_bb_mdio_tristate,
.set_mdio = ravb_bb_set_mdio,
.get_mdio = ravb_bb_get_mdio,
.set_mdc = ravb_bb_set_mdc,
.delay = ravb_bb_delay,
};
static int ravb_bb_miiphy_read(struct mii_dev *miidev, int addr,
int devad, int reg)
{
return bb_miiphy_read(miidev, &ravb_bb_miiphy_bus_ops,
addr, devad, reg);
}
static int ravb_bb_miiphy_write(struct mii_dev *miidev, int addr,
int devad, int reg, u16 value)
{
return bb_miiphy_write(miidev, &ravb_bb_miiphy_bus_ops,
addr, devad, reg, value);
}
static int ravb_probe(struct udevice *dev)
{
struct mii_dev *mdiodev;
...
mdiodev = mdio_alloc();
if (!mdiodev)
return -ENOMEM;
mdiodev->read = ravb_bb_miiphy_read;
mdiodev->write = ravb_bb_miiphy_write;
mdiodev->priv = eth;
snprintf(mdiodev->name, sizeof(mdiodev->name), dev->name);
ret = mdio_register(mdiodev);
...
}

1
doc/develop/index.rst
View file

@ -9,6 +9,7 @@ General
.. toctree::
:maxdepth: 1
bitbangmii
board_best_practices
codingstyle
designprinciples

6
lib/efi_loader/elf_efi.ldsi
View file

@ -21,10 +21,10 @@ SECTIONS
*(.gnu.linkonce.t.*)
*(.srodata)
*(.rodata*)
. = ALIGN(16);
*(.dynamic);
. = ALIGN(512);
}
. = ALIGN(16);
.dynamic : { *(.dynamic) }
. = ALIGN(512);
.rela.dyn : { *(.rela.dyn) }
.rela.plt : { *(.rela.plt) }
.rela.got : { *(.rela.got) }

4
scripts/Makefile.lib
View file

@ -513,8 +513,8 @@ $(obj)/%_efi.S: $(obj)/%.efi
$(call cmd,S_efi)
quiet_cmd_efi_objcopy = OBJCOPY $@
cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \
.dynamic -j .dynsym -j .rel* -j .rela* -j .reloc \
cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data \
-j .dynamic -j .dynstr -j .dynsym -j .rel* -j .reloc \
$(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
$(obj)/%.efi: $(obj)/%_efi.so