mirror of
https://github.com/AsahiLinux/u-boot
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91558c8153
solve issue when bootstage is used with armV7 generic timer
first call of timer_get_boot_us() use the function get_timer()
before timer initialization (arch.timer_rate_hz = 0)
=> div by 0
Commit-notes
When I activate bootstage on ARMV7 architecture with platform
using the generic armv7 timer defined in file
./arch/arm/cpu/armv7m/timer.c
I have a issue because gd->arch.timer_rate_hz = 0
For me the get_timer() function should not used before timer_init
(which initialize gd->arch.timer_rate_hz) at least for the ARMV7
timer.
But in the init sequence, the first bootstage fucntion is called
before timer_init and this function use the timer function.
For me it is a error in the generic init sequence :
mark_bootstage is called before timer_init.
static init_fnc_t init_sequence_f[] = {
....
arch_cpu_init_dm,
mark_bootstage, /* need timer, go after init dm */
...
#if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || \
defined(CONFIG_BLACKFIN) || defined(CONFIG_NDS32) || \
defined(CONFIG_SPARC)
timer_init, /* initialize timer */
#endif
.......
To solve the issue for all the paltform, we can move timer_init()
call just before mark_bootstage() in this array...
It should be ok for ARMV7 but I don't sure for other platform
impacted
- the other ARM platform or ARMV7 wich don't use generic timer
- MIPS BLACKFIN NDS32 or SPARC
and I don't sure of impact for other function called
(board_early_init_f for example....)
=> This patch solve issue only in timer armv7
get_boot_us() can be called everytime without div by 0 issue
(gd->arch.timer_rate_hz is not used)
END
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
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| .. | ||
| cpu | ||
| dts | ||
| imx-common | ||
| include | ||
| lib | ||
| mach-at91 | ||
| mach-bcm283x | ||
| mach-davinci | ||
| mach-exynos | ||
| mach-highbank | ||
| mach-integrator | ||
| mach-keystone | ||
| mach-kirkwood | ||
| mach-meson | ||
| mach-mvebu | ||
| mach-omap2 | ||
| mach-orion5x | ||
| mach-rmobile | ||
| mach-rockchip | ||
| mach-s5pc1xx | ||
| mach-snapdragon | ||
| mach-socfpga | ||
| mach-stm32 | ||
| mach-sunxi | ||
| mach-tegra | ||
| mach-uniphier | ||
| mach-versatile | ||
| mach-zynq | ||
| thumb1/include/asm/proc-armv | ||
| config.mk | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||