diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/common/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/common/boottime.c | 46 | ||||
| -rw-r--r-- | arch/arm/include/asm/setup.h | 21 |
3 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile index 215816f1775..d5b5aa2fe3c 100644 --- a/arch/arm/common/Makefile +++ b/arch/arm/common/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_ARCH_IXP2000) += uengine.o obj-$(CONFIG_ARCH_IXP23XX) += uengine.o obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o +obj-$(CONFIG_BOOTTIME) += boottime.o diff --git a/arch/arm/common/boottime.c b/arch/arm/common/boottime.c new file mode 100644 index 00000000000..73e9e04ed37 --- /dev/null +++ b/arch/arm/common/boottime.c @@ -0,0 +1,46 @@ +/* + * Copyright (C) ST-Ericsson SA 2009-2010 + * + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson + * + * License terms: GNU General Public License (GPL) version 2 + * + * Store boot times measured during for example u-boot startup. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/boottime.h> +#include <linux/string.h> +#include <asm/setup.h> + +static u32 bootloader_idle; +static u32 bootloader_total; + +static int __init boottime_parse_tag(const struct tag *tag) +{ + int i; + char buff[BOOTTIME_MAX_NAME_LEN]; + + bootloader_idle = tag->u.boottime.idle; + bootloader_total = tag->u.boottime.total; + + for (i = 0; i < tag->u.boottime.num; i++) { + snprintf(buff, BOOTTIME_MAX_NAME_LEN, "%s+0x0/0x0", + tag->u.boottime.entry[i].name); + buff[BOOTTIME_MAX_NAME_LEN - 1] = '\0'; + boottime_mark_wtime(buff, tag->u.boottime.entry[i].time); + } + + return 0; +} + +__tagtable(ATAG_BOOTTIME, boottime_parse_tag); + +int boottime_bootloader_idle(void) +{ + if (bootloader_total == 0) + return 0; + + return (int) ((bootloader_idle) / (bootloader_total / 100)); +} diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h index 23ebc0c82a3..ea1384fea05 100644 --- a/arch/arm/include/asm/setup.h +++ b/arch/arm/include/asm/setup.h @@ -143,6 +143,23 @@ struct tag_memclk { __u32 fmemclk; }; +/* for automatic boot timing testcases */ +#define ATAG_BOOTTIME 0x41000403 +#define BOOTTIME_MAX_NAME_LEN 64 +#define BOOTTIME_MAX 10 + +struct boottime_entry { + u32 time; /* in us */ + u8 name[BOOTTIME_MAX_NAME_LEN]; +}; + +struct tag_boottime { + struct boottime_entry entry[BOOTTIME_MAX]; + u32 idle; /* in us */ + u32 total; /* in us */ + u8 num; +}; + struct tag { struct tag_header hdr; union { @@ -165,6 +182,10 @@ struct tag { * DC21285 specific */ struct tag_memclk memclk; + /* + * Boot time + */ + struct tag_boottime boottime; } u; }; |