1 # SPDX-License-Identifier: GPL-2.0
2
3 config EARLY_PRINTK
4 bool "Early printk" if EXPERT
5 depends on SYS_HAS_EARLY_PRINTK
6 default y
7 help
8 This option enables special console
9 to print messages very early in the
10
11 This is useful for kernel debugging
12 early before the console code is ini
13 it is not recommended because it loo
14 doesn't cooperate with an X server.
15 unless you want to debug such a cras
16
17 config EARLY_PRINTK_8250
18 bool
19 depends on EARLY_PRINTK && USE_GENERIC
20 default y
21 help
22 "8250/16550 and compatible serial ea
23 If you say Y here, it will be possib
24 port as the boot console.
25
26 config USE_GENERIC_EARLY_PRINTK_8250
27 bool
28
29 config CMDLINE_BOOL
30 bool "Built-in kernel command line"
31 help
32 For most systems, it is firmware or
33 by default specifies the kernel comm
34 it might be necessary or advantageou
35 default kernel command line or add a
36 For such cases, this option allows y
37 command line options directly into t
38 should choose 'Y' here, and fill in
39 in CONFIG_CMDLINE.
40
41 The built-in options will be concate
42 line if CMDLINE_OVERRIDE is set to '
43 command line will be ignored and rep
44
45 Most MIPS systems will normally expe
46 the command line from the firmware o
47
48 config CMDLINE
49 string "Default kernel command string"
50 depends on CMDLINE_BOOL
51 help
52 On some platforms, there is currentl
53 pass arguments to the kernel. For t
54 when you want to add some extra opti
55 the default command line, you can su
56 build time by entering them here. I
57 kernel args so that you don't have t
58 initialization routines.
59
60 For more information, see the CMDLIN
61 options.
62
63 config CMDLINE_OVERRIDE
64 bool "Built-in command line overrides
65 depends on CMDLINE_BOOL
66 help
67 By setting this option to 'Y' you wi
68 command line arguments from firmware
69 Instead, the built-in command line w
70
71 Normally, you will choose 'N' here.
72
73 config SB1XXX_CORELIS
74 bool "Corelis Debugger"
75 depends on SIBYTE_SB1xxx_SOC
76 select DEBUG_KERNEL if !COMPILE_TEST
77 select DEBUG_INFO if !COMPILE_TEST
78 help
79 Select compile flags that produce co
80 Corelis mksym utility and UDB Emulat
81
82 config DEBUG_ZBOOT
83 bool "Enable compressed kernel support
84 depends on DEBUG_KERNEL && SYS_SUPPORT
85 default n
86 help
87 If you want to add compressed kernel
88 board supports uart16550 compatible
89 SYS_SUPPORTS_ZBOOT_UART16550 for you
90 debug it.
91
92 If your board doesn't support uart16
93 can try to select SYS_SUPPORTS_ZBOOT
94 debug it. for example, add a new ser
95 arch/mips/boot/compressed/uart-16550
96
97 After the compressed kernel support
98 to reduce the kernel image size and
99 little.
100
101 config ZBOOT_INGENIC_UART
102 int "UART to use for compressed kernel
103 depends on DEBUG_ZBOOT && MACH_INGENIC
104 default 0
105 range 0 4
106 help
107 Specify the UART that should be used
108
109 config SPINLOCK_TEST
110 bool "Enable spinlock timing tests in
111 depends on DEBUG_FS
112 default n
113 help
114 Add several files to the debugfs to
115
116 config SCACHE_DEBUGFS
117 bool "L2 cache debugfs entries"
118 depends on DEBUG_FS
119 help
120 Enable this to allow parts of the L2
121 whether or not prefetching is enable
122 via debugfs.
123
124 If unsure, say N.
125
126 menuconfig MIPS_CPS_NS16550_BOOL
127 bool "CPS SMP NS16550 UART output"
128 depends on MIPS_CPS
129 help
130 Output debug information via an ns16
131 occur early in the boot process of a
132
133 if MIPS_CPS_NS16550_BOOL
134
135 config MIPS_CPS_NS16550
136 def_bool MIPS_CPS_NS16550_BASE != 0
137
138 config MIPS_CPS_NS16550_BASE
139 hex "UART Base Address"
140 default 0x1b0003f8 if MIPS_MALTA
141 default 0
142 help
143 The base address of the ns16550 comp
144 debug information from the early sta
145
146 This is only used if non-zero.
147
148 config MIPS_CPS_NS16550_SHIFT
149 int "UART Register Shift"
150 default 0
151 help
152 The number of bits to shift ns16550
153 form their addresses. That is, log b
154 adjacent ns16550 registers in the sy
155
156 config MIPS_CPS_NS16550_WIDTH
157 int "UART Register Width"
158 default 1
159 help
160 ns16550 registers width. UART regist
161 selected in accordance with this par
162 4 UART registers will be accessed by
163 instructions respectively. Any value
164 lb/sb instructions.
165
166 endif # MIPS_CPS_NS16550_BOOL
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