Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | |
192ef366 RB |
3 | config TRACE_IRQFLAGS_SUPPORT |
4 | bool | |
5 | default y | |
6 | ||
4dd92e15 | 7 | config EARLY_PRINTK |
6a108a14 | 8 | bool "Early printk" if EXPERT |
4dd92e15 RB |
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 | ||
7cd93b89 | 21 | config EARLY_PRINTK_8250 |
e6086557 RB |
22 | bool |
23 | depends on EARLY_PRINTK && USE_GENERIC_EARLY_PRINTK_8250 | |
24 | default y | |
7cd93b89 | 25 | help |
e6086557 | 26 | "8250/16550 and compatible serial early printk driver" |
7cd93b89 YY |
27 | If you say Y here, it will be possible to use a 8250/16550 serial |
28 | port as the boot console. | |
29 | ||
e6086557 RB |
30 | config USE_GENERIC_EARLY_PRINTK_8250 |
31 | bool | |
32 | ||
6acc7d48 DV |
33 | config CMDLINE_BOOL |
34 | bool "Built-in kernel command line" | |
35 | default n | |
36 | help | |
37 | For most systems, it is firmware or second stage bootloader that | |
38 | by default specifies the kernel command line options. However, | |
39 | it might be necessary or advantageous to either override the | |
40 | default kernel command line or add a few extra options to it. | |
41 | For such cases, this option allows you to hardcode your own | |
42 | command line options directly into the kernel. For that, you | |
43 | should choose 'Y' here, and fill in the extra boot arguments | |
44 | in CONFIG_CMDLINE. | |
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 | ||
1da177e4 LT |
53 | config CMDLINE |
54 | string "Default kernel command string" | |
6acc7d48 | 55 | depends on CMDLINE_BOOL |
1da177e4 LT |
56 | default "" |
57 | help | |
3e7f9b82 | 58 | On some platforms, there is currently no way for the boot loader to |
6acc7d48 DV |
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. | |
65 | ||
66 | For more information, see the CMDLINE_BOOL and CMDLINE_OVERRIDE | |
67 | options. | |
68 | ||
69 | config CMDLINE_OVERRIDE | |
6b2aac42 | 70 | bool "Built-in command line overrides firmware arguments" |
6acc7d48 DV |
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. | |
1da177e4 | 79 | |
1da177e4 LT |
80 | config SB1XXX_CORELIS |
81 | bool "Corelis Debugger" | |
82 | depends on SIBYTE_SB1xxx_SOC | |
3e441845 | 83 | select DEBUG_INFO if !COMPILE_TEST |
1da177e4 LT |
84 | help |
85 | Select compile flags that produce code that can be processed by the | |
86 | Corelis mksym utility and UDB Emulator. | |
87 | ||
f86a69b1 WZ |
88 | config DEBUG_ZBOOT |
89 | bool "Enable compressed kernel support debugging" | |
90 | depends on DEBUG_KERNEL && SYS_SUPPORTS_ZBOOT | |
91 | default n | |
92 | help | |
93 | If you want to add compressed kernel support to a new board, and the | |
94 | board supports uart16550 compatible serial port, please select | |
95 | SYS_SUPPORTS_ZBOOT_UART16550 for your board and enable this option to | |
96 | debug it. | |
97 | ||
98 | If your board doesn't support uart16550 compatible serial port, you | |
99 | can try to select SYS_SUPPORTS_ZBOOT and use the other methods to | |
100 | debug it. for example, add a new serial port support just as | |
101 | arch/mips/boot/compressed/uart-16550.c does. | |
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 | ||
bba90760 DD |
107 | config SPINLOCK_TEST |
108 | bool "Enable spinlock timing tests in debugfs" | |
109 | depends on DEBUG_FS | |
110 | default n | |
111 | help | |
112 | Add several files to the debugfs to test spinlock speed. | |
113 | ||
d478b088 PB |
114 | config SCACHE_DEBUGFS |
115 | bool "L2 cache debugfs entries" | |
116 | depends on DEBUG_FS | |
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 | ||
7e5e371e | 124 | menuconfig MIPS_CPS_NS16550_BOOL |
609cf6f2 PB |
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 | ||
7e5e371e JH |
131 | if MIPS_CPS_NS16550_BOOL |
132 | ||
133 | config MIPS_CPS_NS16550 | |
134 | def_bool MIPS_CPS_NS16550_BASE != 0 | |
609cf6f2 PB |
135 | |
136 | config MIPS_CPS_NS16550_BASE | |
137 | hex "UART Base Address" | |
138 | default 0x1b0003f8 if MIPS_MALTA | |
7e5e371e | 139 | default 0 |
609cf6f2 PB |
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 | ||
7e5e371e JH |
144 | This is only used if non-zero. |
145 | ||
609cf6f2 PB |
146 | config MIPS_CPS_NS16550_SHIFT |
147 | int "UART Register Shift" | |
7e5e371e | 148 | default 0 |
609cf6f2 PB |
149 | help |
150 | The number of bits to shift ns16550 register indices by in order to | |
151 | form their addresses. That is, log base 2 of the span between | |
152 | adjacent ns16550 registers in the system. | |
153 | ||
7e5e371e | 154 | endif # MIPS_CPS_NS16550_BOOL |