diff options
| author | Simon Glass <[email protected]> | 2019-12-06 21:41:49 -0700 |
|---|---|---|
| committer | Bin Meng <[email protected]> | 2019-12-15 11:44:09 +0800 |
| commit | 77dd7c6854f3bd8ddc422f0cb1953071fe00dc6c (patch) | |
| tree | 9f20790502407316911d7bab7b2f5b69057e0a05 /arch | |
| parent | dd0edcb2508b9abcf828baede32e6b3da5fc0c8a (diff) | |
x86: timer: use a timer base of 0
On x86 platforms the timer is reset to 0 when the SoC is reset. Having
this as the timer base is useful since it provides an indication of how
long it takes before U-Boot is running.
When U-Boot sets the timer base to something else, time is lost and we
no-longer have an accurate account of the time since reset. This
particularly affects bootstage.
Change the default to not read the timer base, leaving it at 0. Add an
option for when U-Boot is the secondary bootloader.
Signed-off-by: Simon Glass <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/cpu/coreboot/Kconfig | 1 | ||||
| -rw-r--r-- | arch/x86/cpu/slimbootloader/Kconfig | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/cpu/coreboot/Kconfig b/arch/x86/cpu/coreboot/Kconfig index 93f61f2fa4f..c8e6a889d02 100644 --- a/arch/x86/cpu/coreboot/Kconfig +++ b/arch/x86/cpu/coreboot/Kconfig @@ -24,5 +24,6 @@ config SYS_COREBOOT imply CMD_CBFS imply FS_CBFS imply CBMEM_CONSOLE + imply X86_TSC_READ_BASE endif diff --git a/arch/x86/cpu/slimbootloader/Kconfig b/arch/x86/cpu/slimbootloader/Kconfig index 3ea4c9958cf..58a9ca01a9e 100644 --- a/arch/x86/cpu/slimbootloader/Kconfig +++ b/arch/x86/cpu/slimbootloader/Kconfig @@ -17,3 +17,4 @@ config SYS_SLIMBOOTLOADER imply USB_EHCI_HCD imply USB_XHCI_HCD imply E1000 + imply X86_TSC_READ_BASE |