Re: [U-Boot] [PATCH 1/2] ARM: Add save_boot_params for ARMv8

[Tom Rini]

On Thu, Jul 21, 2016 at 04:16:57PM +, 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!

-- 
Tom


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Re: [U-Boot] [PATCH 1/2] ARM: Add save_boot_params for ARMv8

[Tom Warren]

Tom,

I'm going to take these 2 in via Tegra if that's OK with you. Expect a PR later 
today.

Tom

> -Original Message-
> From: Tom Rini [mailto:tr...@konsulko.com]
> Sent: Tuesday, July 19, 2016 7:22 PM
> To: Stephen Warren 
> Cc: u-boot@lists.denx.de; Simon Glass ; Tom Warren
> ; Stephen Warren ; Albert
> Aribaud 
> Subject: Re: [PATCH 1/2] ARM: Add save_boot_params for ARMv8
> 
> * PGP Signed by an unknown key
> 
> On Mon, Jul 18, 2016 at 05:01:50PM -0600, Stephen Warren wrote:
> 
> > From: Stephen Warren 
> >
> > 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 
> 
> Reviewed-by: Tom Rini 
> 
> --
> Tom
> 
> * Unknown Key
> * 0xD31D7652
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Re: [U-Boot] [PATCH 1/2] ARM: Add save_boot_params for ARMv8

[Tom Rini]

On Mon, Jul 18, 2016 at 05:01:50PM -0600, Stephen Warren wrote:

> From: Stephen Warren 
> 
> 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 

Reviewed-by: Tom Rini 

-- 
Tom


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[U-Boot] [PATCH 1/2] ARM: Add save_boot_params for ARMv8

[Stephen Warren]

From: Stephen Warren 

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 
---
 arch/arm/cpu/armv8/start.S | 9 +
 1 file changed, 9 insertions(+)

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)
-- 
2.9.2

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