1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 2
3 config SH_STANDARD_BIOS !! 3 config TRACE_IRQFLAGS_SUPPORT
4 bool "Use LinuxSH standard BIOS" !! 4 bool
>> 5 default y
>> 6
>> 7 config EARLY_PRINTK
>> 8 bool "Early printk" if EXPERT
>> 9 depends on SYS_HAS_EARLY_PRINTK
>> 10 default y
>> 11 help
>> 12 This option enables special console drivers which allow the kernel
>> 13 to print messages very early in the bootup process.
>> 14
>> 15 This is useful for kernel debugging when your machine crashes very
>> 16 early before the console code is initialized. For normal operation,
>> 17 it is not recommended because it looks ugly on some machines and
>> 18 doesn't cooperate with an X server. You should normally say N here,
>> 19 unless you want to debug such a crash.
>> 20
>> 21 config EARLY_PRINTK_8250
>> 22 bool
>> 23 depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250
>> 24 default y
>> 25 help
>> 26 "8250/16550 and compatible serial early printk driver"
>> 27 If you say Y here, it will be possible to use a 8250/16550 serial
>> 28 port as the boot console.
>> 29
>> 30 config USE_GENERIC_EARLY_PRINTK_8250
>> 31 bool
>> 32
>> 33 config CMDLINE_BOOL
>> 34 bool "Built-in kernel command line"
>> 35 default n
5 help 36 help
6 Say Y here if your target has the gd !! 37 For most systems, it is firmware or second stage bootloader that
7 package from www.m17n.org (or any co !! 38 by default specifies the kernel command line options. However,
8 in FLASH or EPROM. The kernel will !! 39 it might be necessary or advantageous to either override the
9 boot for various housekeeping tasks !! 40 default kernel command line or add a few extra options to it.
10 write characters to a system console !! 41 For such cases, this option allows you to hardcode your own
11 on-board Ethernet interface, and shu !! 42 command line options directly into the kernel. For that, you
12 does not work with machines with an !! 43 should choose 'Y' here, and fill in the extra boot arguments
13 mask ROM and no flash (WindowsCE mac !! 44 in CONFIG_CMDLINE.
14 If unsure, say N. !! 45
>> 46 The built-in options will be concatenated to the default command
>> 47 line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
>> 48 command line will be ignored and replaced by the built-in string.
>> 49
>> 50 Most MIPS systems will normally expect 'N' here and rely upon
>> 51 the command line from the firmware or the second-stage bootloader.
>> 52
>> 53 config CMDLINE
>> 54 string "Default kernel command string"
>> 55 depends on CMDLINE_BOOL
>> 56 default ""
>> 57 help
>> 58 On some platforms, there is currently no way for the boot loader to
>> 59 pass arguments to the kernel. For these platforms, and for the cases
>> 60 when you want to add some extra options to the command line or ignore
>> 61 the default command line, you can supply some command-line options at
>> 62 build time by entering them here. In other cases you can specify
>> 63 kernel args so that you don't have to set them up in board prom
>> 64 initialization routines.
15 65
16 config STACK_DEBUG !! 66 For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE
17 bool "Check for stack overflows" !! 67 options.
18 depends on DEBUG_KERNEL && PRINTK <<
19 help <<
20 This option will cause messages to b <<
21 drops below a certain limit. Saying <<
22 every function call and will therefo <<
23 performance hit. Most users should s <<
24 68
25 config EARLY_PRINTK !! 69 config CMDLINE_OVERRIDE
26 bool "Early printk" !! 70 bool "Built-in command line overrides firmware arguments"
27 depends on SH_STANDARD_BIOS !! 71 default n
>> 72 depends on CMDLINE_BOOL
>> 73 help
>> 74 By setting this option to 'Y' you will have your kernel ignore
>> 75 command line arguments from firmware or second stage bootloader.
>> 76 Instead, the built-in command line will be used exclusively.
>> 77
>> 78 Normally, you will choose 'N' here.
>> 79
>> 80 config SB1XXX_CORELIS
>> 81 bool "Corelis Debugger"
>> 82 depends on SIBYTE_SB1xxx_SOC
>> 83 select DEBUG_INFO if !COMPILE_TEST
28 help 84 help
29 Say Y here to redirect kernel printk !! 85 Select compile flags that produce code that can be processed by the
30 used by the SH-IPL bootloader, start !! 86 Corelis mksym utility and UDB Emulator.
31 process and ending when the kernel's !! 87
32 This option is only useful while por !! 88 config DEBUG_ZBOOT
33 when the kernel may crash or hang be !! 89 bool "Enable compressed kernel support debugging"
34 initialised. If unsure, say N. !! 90 depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT
35 <<
36 config 4KSTACKS <<
37 bool "Use 4Kb for kernel stacks instea <<
38 depends on DEBUG_KERNEL && (MMU || BRO <<
39 help <<
40 If you say Y here the kernel will us <<
41 kernel stack attached to each proces <<
42 running more threads on a system and <<
43 on the VM subsystem for higher order <<
44 will also use IRQ stacks to compensa <<
45 <<
46 config IRQSTACKS <<
47 bool "Use separate kernel stacks when <<
48 depends on DEBUG_KERNEL && BROKEN <<
49 help <<
50 If you say Y here the kernel will us <<
51 for handling hard and soft interrupt <<
52 overflowing the process kernel stack <<
53 <<
54 config DUMP_CODE <<
55 bool "Show disassembly of nearby code <<
56 depends on DEBUG_KERNEL <<
57 default y if DEBUG_BUGVERBOSE <<
58 default n 91 default n
59 help 92 help
60 This prints out a code trace of the !! 93 If you want to add compressed kernel support to a new board, and the
61 the faulting instruction as a debugg !! 94 board supports uart16550 compatible serial port, please select
62 the kernel in size a bit, most users !! 95 SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to
63 !! 96 debug it.
64 Those looking for more verbose debug !! 97
65 !! 98 If your board doesn't support uart16550 compatible serial port, you
66 config DWARF_UNWINDER !! 99 can try to select SYS_SUPPORTS_ZBOOT and use the other methods to
67 bool "Enable the DWARF unwinder for st !! 100 debug it. for example, add a new serial port support just as
68 depends on DEBUG_KERNEL !! 101 arch/mips/boot/compressed/uart-16550.c does.
69 select FRAME_POINTER !! 102
>> 103 After the compressed kernel support works, please disable this option
>> 104 to reduce the kernel image size and speed up the booting procedure a
>> 105 little.
>> 106
>> 107 config SPINLOCK_TEST
>> 108 bool "Enable spinlock timing tests in debugfs"
>> 109 depends on DEBUG_FS
70 default n 110 default n
71 help 111 help
72 Enabling this option will make stack !! 112 Add several files to the debugfs to test spinlock speed.
73 the cost of an increase in overall k <<
74 113
75 config SH_NO_BSS_INIT !! 114 config SCACHE_DEBUGFS
76 bool "Avoid zeroing BSS (to speed-up s !! 115 bool "L2 cache debugfs entries"
77 depends on DEBUG_KERNEL !! 116 depends on DEBUG_FS
78 default n !! 117 help
>> 118 Enable this to allow parts of the L2 cache configuration, such as
>> 119 whether or not prefetching is enabled, to be exposed to userland
>> 120 via debugfs.
>> 121
>> 122 If unsure, say N.
>> 123
>> 124 menuconfig MIPS_CPS_NS16550_BOOL
>> 125 bool "CPS SMP NS16550 UART output"
>> 126 depends on MIPS_CPS
>> 127 help
>> 128 Output debug information via an ns16550 compatible UART if exceptions
>> 129 occur early in the boot process of a secondary core.
>> 130
>> 131 if MIPS_CPS_NS16550_BOOL
>> 132
>> 133 config MIPS_CPS_NS16550
>> 134 def_bool MIPS_CPS_NS16550_BASE != 0
>> 135
>> 136 config MIPS_CPS_NS16550_BASE
>> 137 hex "UART Base Address"
>> 138 default 0x1b0003f8 if MIPS_MALTA
>> 139 default 0
>> 140 help
>> 141 The base address of the ns16550 compatible UART on which to output
>> 142 debug information from the early stages of core startup.
>> 143
>> 144 This is only used if non-zero.
>> 145
>> 146 config MIPS_CPS_NS16550_SHIFT
>> 147 int "UART Register Shift"
>> 148 default 0
79 help 149 help
80 If running in painfully slow environ !! 150 The number of bits to shift ns16550 register indices by in order to
81 simulation or from remote memory via !! 151 form their addresses. That is, log base 2 of the span between
82 can already be guaranteed to ber zer !! 152 adjacent ns16550 registers in the system.
83 !! 153
84 For all other cases, say N. If this !! 154 endif # MIPS_CPS_NS16550_BOOL
85 you aren't sure, say N. <<
86 <<
87 config MCOUNT <<
88 def_bool y <<
89 depends on STACK_DEBUG || FUNCTION_TRA <<
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