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| author | Huzefa Kankroliwala <huzefank@ti.com> | 2012-01-04 15:51:57 -0600 |
|---|---|---|
| committer | Ziyann <jaraidaniel@gmail.com> | 2014-10-01 12:55:13 +0200 |
| commit | 7b905dcb3e7d29d28907c4839fdf25a368a5353e (patch) | |
| tree | ec703faad087d8e3c502c9e8ec8f165dfa42d52d /arch/arm/mach-omap2/omap_ram_console.h | |
| parent | 99b10fe0506d97bdbb111ca8d385fecddec0ca7a (diff) | |
| download | kernel_samsung_tuna-7b905dcb3e7d29d28907c4839fdf25a368a5353e.tar.gz kernel_samsung_tuna-7b905dcb3e7d29d28907c4839fdf25a368a5353e.tar.bz2 kernel_samsung_tuna-7b905dcb3e7d29d28907c4839fdf25a368a5353e.zip | |
OMAP: Support for Android RAM console
Android's RAMCONSOLE framework is handy framework which allows
saving the kernel printk messages to a buffer in RAM, so that
after a kernel panic they can be viewed in the next kernel
invocation, by accessing /proc/last_kmsg.
This obviously needs DDR to be in selfrefresh mode. Board files
which have relevant support need to enable CONFIG_OMAP_RAM_CONSOLE
and call omap_ram_console_init with relevant parameters for this
to function.
Change-Id: I2dd5ad55a0a3af5a5dcb9a9b8a797e1371af39bc
Signed-off-by: Huzefa Kankroliwala <huzefank@ti.com>
Signed-off-by: Akash Choudhari <akashc@ti.com>
Signed-off-by: Ameya Palande <ameya.palande@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/omap_ram_console.h')
| -rw-r--r-- | arch/arm/mach-omap2/omap_ram_console.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap_ram_console.h b/arch/arm/mach-omap2/omap_ram_console.h new file mode 100644 index 00000000000..edd75e8d484 --- /dev/null +++ b/arch/arm/mach-omap2/omap_ram_console.h @@ -0,0 +1,33 @@ +/* + * OMAP ram console support + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Huzefa Kankroliwala <huzefank@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __OMAP_RAM_CONSOLE_H +#define __OMAP_RAM_CONSOLE_H + +/* Board files use the following if they are ok with 512M size defaults */ +#define OMAP_RAM_CONSOLE_START_DEFAULT (PLAT_PHYS_OFFSET + SZ_512M) +#define OMAP_RAM_CONSOLE_SIZE_DEFAULT SZ_2M + +#ifdef CONFIG_OMAP_RAM_CONSOLE +extern int omap_ram_console_init(phys_addr_t phy_addr, size_t size); +#else +static inline int omap_ram_console_init(phys_addr_t phy_addr, size_t size) +{ + return 0; +} +#endif /* CONFIG_OMAP_RAM_CONSOLE */ + +#endif |