Message ID | 20160718230151.1670-1-swarren@wwwdotorg.org |
---|---|
State | Accepted |
Commit | 0e2b5350d9523c9b2dca57b98c89f031691d23e3 |
Delegated to: | Tom Warren |
Headers | show |
On Mon, Jul 18, 2016 at 05:01:50PM -0600, Stephen Warren wrote: > From: Stephen Warren <swarren@nvidia.com> > > Implement a hook to allow boards to save boot-time CPU state for later > use. When U-Boot is chain-loaded by another bootloader, CPU registers may > contain useful information such as system configuration information. This > feature mirrors the equivalent ARMv7 feature. > > Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Tom Rini <trini@konsulko.com>
On Thu, Jul 21, 2016 at 04:16:57PM +0000, Tom Warren wrote: > Tom, > > I'm going to take these 2 in via Tegra if that's OK with you. Expect a PR later today. Sounds good, thanks!
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index dfce46920668..f77fa44ad6c3 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -53,6 +53,11 @@ _bss_end_ofs: .quad __bss_end - _start reset: + /* Allow the board to save important registers */ + b save_boot_params +.globl save_boot_params_ret +save_boot_params_ret: + #ifdef CONFIG_SYS_RESET_SCTRL bl reset_sctrl #endif @@ -288,3 +293,7 @@ ENTRY(c_runtime_cpu_setup) ret ENDPROC(c_runtime_cpu_setup) + +WEAK(save_boot_params) + b save_boot_params_ret /* back to my caller */ +ENDPROC(save_boot_params)