diff mbox series

[1/1] BootLogoLib: align logo coords to be even

Message ID 20240617083639.379608-1-marcin.juszkiewicz@linaro.org (mailing list archive)
State New, archived
Headers show
Series [1/1] BootLogoLib: align logo coords to be even | expand

Commit Message

Marcin Juszkiewicz June 17, 2024, 8:36 a.m. UTC 
If we draw logo at odd coords then BootLogoLib goes into exception and
boot process ends:

Synchronous Exception at 0x00000101FB943E48
PC 0x0101FB943E48 (0x0101FB93F000+0x00004E48) [ 0] QemuVideoDxe.dll
PC 0x0101FB943314 (0x0101FB93F000+0x00004314) [ 0] QemuVideoDxe.dll
PC 0x0101FB92F798 (0x0101FB92D000+0x00002798) [ 1] ConSplitterDxe.dll
PC 0x0101FBA96BC4 (0x0101FBA8E000+0x00008BC4) [ 2] BdsDxe.dll
PC 0x0101FF7FDF50 (0x0101FF7F3000+0x0000AF50) [ 3] DxeCore.dll

This change resizes logo from 193x58 to 194x58px to make it's sizes
even. And if coords are odd then they are bumped a bit to make things
work.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
---
 .../Library/BootLogoLib/BootLogoLib.c         |   4 ++++
 MdeModulePkg/Logo/Logo.bmp                    | Bin 12446 -> 34010 bytes
 2 files changed, 4 insertions(+)

diff --git a/MdeModulePkg/Logo/Logo.bmp b/MdeModulePkg/Logo/Logo.bmp
index 3e85229e17595ba1f9c59e13692a4f8362ebc850..136345a56ac44e3ea8d3c91114b5a2676dc90e2a 100644
GIT binary patch
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Comments

Ard Biesheuvel June 17, 2024, 8:39 a.m. UTC | #1 
On Mon, 17 Jun 2024 at 10:37, Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> If we draw logo at odd coords then BootLogoLib goes into exception and
> boot process ends:
>
> Synchronous Exception at 0x00000101FB943E48
> PC 0x0101FB943E48 (0x0101FB93F000+0x00004E48) [ 0] QemuVideoDxe.dll
> PC 0x0101FB943314 (0x0101FB93F000+0x00004314) [ 0] QemuVideoDxe.dll
> PC 0x0101FB92F798 (0x0101FB92D000+0x00002798) [ 1] ConSplitterDxe.dll
> PC 0x0101FBA96BC4 (0x0101FBA8E000+0x00008BC4) [ 2] BdsDxe.dll
> PC 0x0101FF7FDF50 (0x0101FF7F3000+0x0000AF50) [ 3] DxeCore.dll
>
> This change resizes logo from 193x58 to 194x58px to make it's sizes
> even. And if coords are odd then they are bumped a bit to make things
> work.
>
> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>

This should be fixed in the SBSA firmware - unaligned accesses are
fine on arm64 as long as they don't target device memory. So this
likely implies that the framebuffer is mapped with device attributes
while it should be mapped normal-non-cacheable.


> ---
>  .../Library/BootLogoLib/BootLogoLib.c         |   4 ++++
>  MdeModulePkg/Logo/Logo.bmp                    | Bin 12446 -> 34010 bytes
>  2 files changed, 4 insertions(+)
>
> diff --git a/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c b/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
> index 478ec2d40e2b..3b7b5f3146e8 100644
> --- a/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
> +++ b/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
> @@ -205,6 +205,10 @@ BootLogoEnableLogo (
>      DestX += OffsetX;
>      DestY += OffsetY;
>
> +    // align logo to even coords
> +    if (DestX % 2 != 0) DestX++;
> +    if (DestY % 2 != 0) DestY++;
> +
>      if ((DestX >= 0) && (DestY >= 0)) {
>        if (GraphicsOutput != NULL) {
>          Status = GraphicsOutput->Blt (
> diff --git a/MdeModulePkg/Logo/Logo.bmp b/MdeModulePkg/Logo/Logo.bmp
> index 3e85229e17595ba1f9c59e13692a4f8362ebc850..136345a56ac44e3ea8d3c91114b5a2676dc90e2a 100644
> GIT binary patch
> literal 34010
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> --
> 2.45.1
>
Marcin Juszkiewicz June 17, 2024, 11:27 a.m. UTC | #2 
W dniu 17.06.2024 o 10:39, Ard Biesheuvel pisze:
>> If we draw logo at odd coords then BootLogoLib goes into exception and
>> boot process ends:
>>
>> Synchronous Exception at 0x00000101FB943E48
>> PC 0x0101FB943E48 (0x0101FB93F000+0x00004E48) [ 0] QemuVideoDxe.dll
>> PC 0x0101FB943314 (0x0101FB93F000+0x00004314) [ 0] QemuVideoDxe.dll
>> PC 0x0101FB92F798 (0x0101FB92D000+0x00002798) [ 1] ConSplitterDxe.dll
>> PC 0x0101FBA96BC4 (0x0101FBA8E000+0x00008BC4) [ 2] BdsDxe.dll
>> PC 0x0101FF7FDF50 (0x0101FF7F3000+0x0000AF50) [ 3] DxeCore.dll
>>
>> This change resizes logo from 193x58 to 194x58px to make it's sizes
>> even. And if coords are odd then they are bumped a bit to make things
>> work.
>>
>> Signed-off-by: Marcin Juszkiewicz<marcin.juszkiewicz@linaro.org>

> This should be fixed in the SBSA firmware

One coffee was not enough so I sent it to QEMU devel instead of EDK2 
devel mailing list...

> unaligned accesses are fine on arm64 as long as they don't target
> device memory. So this likely implies that the framebuffer is
> mapped with device attributes while it should be mapped  > normal-non-cacheable.

OK, so need to go through QEMU source now.
diff mbox series

Patch

diff --git a/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c b/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
index 478ec2d40e2b..3b7b5f3146e8 100644
--- a/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
+++ b/MdeModulePkg/Library/BootLogoLib/BootLogoLib.c
@@ -205,6 +205,10 @@  BootLogoEnableLogo (
     DestX += OffsetX;
     DestY += OffsetY;
 
+    // align logo to even coords
+    if (DestX % 2 != 0) DestX++;
+    if (DestY % 2 != 0) DestY++;
+
     if ((DestX >= 0) && (DestY >= 0)) {
       if (GraphicsOutput != NULL) {
         Status = GraphicsOutput->Blt (