U-boot and Mathematical Library
Hi to everyone.
I have a general question: my need is to use u-boot to initialize a PowerPC 5123 and then to continue with a custom kernel without Linux. The problem is that during initialization I must drive very early a graphical controller by PCI to show some logos and I need of mathematical library; I suspect that u-boot doesn't support any. First question there exist one compatible with u-boot ? In your opinion is it possible to follow idea of import a mathematical library to boot and draw something and after continue with a custom kernel ? There is some deep technical reason to load a Linux kernel and then plot a logo ?
Thanks and best regards.
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Vincenzo Scianni a ?crit :
Quoted 7 lines
Hi to everyone.
I have a general question: my need is to use u-boot to initialize a PowerPC 5123 and then to continue with a custom kernel without Linux. The problem is that during initialization I must drive very early a graphical controller by PCI to show some logos and I need of mathematical library;
What kind of logo display requires math? You're going to display a bitmap probably, so the only math involved would be integer arithmetic, I think. And if you have a logo in vector form, then you can convert it to bitmap (adapted to your FB format) offline and link the bitmap from, not the vector, in u-boot.
Quoted 1 line
I suspect that u-boot doesn't support any.
I suspect you're right.
Quoted 1 line
First question there exist one compatible with u-boot ?
Don't know.
Quoted 3 lines
In your opinion is it possible to follow idea of import a mathematical library to boot and draw something and after continue with a custom kernel ?
No reason why you could not; but I think that's a waste of FLASH and cycles, and you'd be better of turning your logo into a simple bitmap format that u-boot possibly already understands.
Quoted 2 lines
There is some
deep technical reason to load a Linux kernel and then plot a logo ?
No reason for this, but again, no reason (that I can see from your description) that you'd need math in the first place. Can you elaborate on the reason that makes you need math onboard rather than off-board?
Amicalement,
Signature · 1 line
Albert.
Hi,
Quoted 9 lines
Vincenzo Scianni a ?crit :
Quoted 7 lines
Hi to everyone.
I have a general question: my need is to use u-boot to initialize a PowerPC 5123 and then to continue with a custom kernel without Linux. The problem is that during initialization I must drive very early a graphical controller by PCI to show some logos and I need of mathematical library;
Quoted 5 lines
What kind of logo display requires math? You're going to display a bitmap probably, so the only math involved would be integer arithmetic, I think. And if you have a logo in vector form, then you can convert it to bitmap (adapted to your FB format) offline and link the bitmap from, not the vector, in u-boot.
Check the splashscreen support already in place (CONFIG_CMD_BMP). It supports BMPs.
Cheers
Detlev
Signature · 8 lines
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