forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
166 lines
5.6 KiB
166 lines
5.6 KiB
# SPDX-License-Identifier: GPL-2.0 |
|
|
|
config EARLY_PRINTK |
|
bool "Early printk" if EXPERT |
|
depends on SYS_HAS_EARLY_PRINTK |
|
default y |
|
help |
|
This option enables special console drivers which allow the kernel |
|
to print messages very early in the bootup process. |
|
|
|
This is useful for kernel debugging when your machine crashes very |
|
early before the console code is initialized. For normal operation, |
|
it is not recommended because it looks ugly on some machines and |
|
doesn't cooperate with an X server. You should normally say N here, |
|
unless you want to debug such a crash. |
|
|
|
config EARLY_PRINTK_8250 |
|
bool |
|
depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250 |
|
default y |
|
help |
|
"8250/16550 and compatible serial early printk driver" |
|
If you say Y here, it will be possible to use a 8250/16550 serial |
|
port as the boot console. |
|
|
|
config USE_GENERIC_EARLY_PRINTK_8250 |
|
bool |
|
|
|
config CMDLINE_BOOL |
|
bool "Built-in kernel command line" |
|
help |
|
For most systems, it is firmware or second stage bootloader that |
|
by default specifies the kernel command line options. However, |
|
it might be necessary or advantageous to either override the |
|
default kernel command line or add a few extra options to it. |
|
For such cases, this option allows you to hardcode your own |
|
command line options directly into the kernel. For that, you |
|
should choose 'Y' here, and fill in the extra boot arguments |
|
in CONFIG_CMDLINE. |
|
|
|
The built-in options will be concatenated to the default command |
|
line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default |
|
command line will be ignored and replaced by the built-in string. |
|
|
|
Most MIPS systems will normally expect 'N' here and rely upon |
|
the command line from the firmware or the second-stage bootloader. |
|
|
|
config CMDLINE |
|
string "Default kernel command string" |
|
depends on CMDLINE_BOOL |
|
help |
|
On some platforms, there is currently no way for the boot loader to |
|
pass arguments to the kernel. For these platforms, and for the cases |
|
when you want to add some extra options to the command line or ignore |
|
the default command line, you can supply some command-line options at |
|
build time by entering them here. In other cases you can specify |
|
kernel args so that you don't have to set them up in board prom |
|
initialization routines. |
|
|
|
For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE |
|
options. |
|
|
|
config CMDLINE_OVERRIDE |
|
bool "Built-in command line overrides firmware arguments" |
|
depends on CMDLINE_BOOL |
|
help |
|
By setting this option to 'Y' you will have your kernel ignore |
|
command line arguments from firmware or second stage bootloader. |
|
Instead, the built-in command line will be used exclusively. |
|
|
|
Normally, you will choose 'N' here. |
|
|
|
config SB1XXX_CORELIS |
|
bool "Corelis Debugger" |
|
depends on SIBYTE_SB1xxx_SOC |
|
select DEBUG_KERNEL if !COMPILE_TEST |
|
select DEBUG_INFO if !COMPILE_TEST |
|
help |
|
Select compile flags that produce code that can be processed by the |
|
Corelis mksym utility and UDB Emulator. |
|
|
|
config DEBUG_ZBOOT |
|
bool "Enable compressed kernel support debugging" |
|
depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT |
|
default n |
|
help |
|
If you want to add compressed kernel support to a new board, and the |
|
board supports uart16550 compatible serial port, please select |
|
SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to |
|
debug it. |
|
|
|
If your board doesn't support uart16550 compatible serial port, you |
|
can try to select SYS_SUPPORTS_ZBOOT and use the other methods to |
|
debug it. for example, add a new serial port support just as |
|
arch/mips/boot/compressed/uart-16550.c does. |
|
|
|
After the compressed kernel support works, please disable this option |
|
to reduce the kernel image size and speed up the booting procedure a |
|
little. |
|
|
|
config ZBOOT_INGENIC_UART |
|
int "UART to use for compressed kernel debugging" |
|
depends on DEBUG_ZBOOT && MACH_INGENIC_SOC |
|
default 0 |
|
range 0 4 |
|
help |
|
Specify the UART that should be used for compressed kernel debugging. |
|
|
|
config SPINLOCK_TEST |
|
bool "Enable spinlock timing tests in debugfs" |
|
depends on DEBUG_FS |
|
default n |
|
help |
|
Add several files to the debugfs to test spinlock speed. |
|
|
|
config SCACHE_DEBUGFS |
|
bool "L2 cache debugfs entries" |
|
depends on DEBUG_FS |
|
help |
|
Enable this to allow parts of the L2 cache configuration, such as |
|
whether or not prefetching is enabled, to be exposed to userland |
|
via debugfs. |
|
|
|
If unsure, say N. |
|
|
|
menuconfig MIPS_CPS_NS16550_BOOL |
|
bool "CPS SMP NS16550 UART output" |
|
depends on MIPS_CPS |
|
help |
|
Output debug information via an ns16550 compatible UART if exceptions |
|
occur early in the boot process of a secondary core. |
|
|
|
if MIPS_CPS_NS16550_BOOL |
|
|
|
config MIPS_CPS_NS16550 |
|
def_bool MIPS_CPS_NS16550_BASE != 0 |
|
|
|
config MIPS_CPS_NS16550_BASE |
|
hex "UART Base Address" |
|
default 0x1b0003f8 if MIPS_MALTA |
|
default 0 |
|
help |
|
The base address of the ns16550 compatible UART on which to output |
|
debug information from the early stages of core startup. |
|
|
|
This is only used if non-zero. |
|
|
|
config MIPS_CPS_NS16550_SHIFT |
|
int "UART Register Shift" |
|
default 0 |
|
help |
|
The number of bits to shift ns16550 register indices by in order to |
|
form their addresses. That is, log base 2 of the span between |
|
adjacent ns16550 registers in the system. |
|
|
|
config MIPS_CPS_NS16550_WIDTH |
|
int "UART Register Width" |
|
default 1 |
|
help |
|
ns16550 registers width. UART registers IO access methods will be |
|
selected in accordance with this parameter. By setting it to 1, 2 or |
|
4 UART registers will be accessed by means of lb/sb, lh/sh or lw/sw |
|
instructions respectively. Any value not from that set activates |
|
lb/sb instructions. |
|
|
|
endif # MIPS_CPS_NS16550_BOOL
|
|
|