Of all the gin joints in all the towns in all the world, Stephen Polkowski had to walk into mine at 10:30:41 on Wednesday 19 February 2014 and say:
> Rats. Thanks Andrew. Note that this does not mean you can't use the EDKII to build an EFI application which will run on the Apple EFI firmware. (Not sure about EFI drivers though.) EFI 1.10 still uses the same executable format (PE32/PE32+) and many of the protocols are the same. You can write hello world programs that will run on both Apple machines and newer UEFI-based systems. It may not be officially supported, but it works. You just need to be careful to constrain yourself to protocols that are supported in EFI 1.10. There is one thing which may stymie you a little which is that when a Mac boots, the console is in "graphics" mode. This is to say that if you call one of the console I/O services to try and print something on the screen, you won't see it displayed. You need to use the ConsoleControl protocol to switch it to "text" mode first. EFI 1.10 uses the UgaDraw protocol. Apparently it makes a distinction between graphic and text modes, even though technically they're both the same thing (in text mode, software still BLTs characters onto the screen a pixel at a time). If the console is in graphics mode, then you can use the UgaDraw BLT method to draw graphics on the screen. If it's in text mode, then you can use the console I/O services to print things. But you can't use the UgaDraw BLT method to draw stuff on the screen while it's in text mode, and vice-versa. By contast, with the GraphicsOutput protocol in UEFI, you can do both at the same time. You can see an example of how to use the ConsoleControl protocol to switch the screen to text mode here (among other places, probably): http://sourcecodebrowser.com/refit/0.7/ebounce_8c.html Although it's not used in UEFI, the protocol definition is still in the EDKII under: EdkCompatibilityPkg/Foundation/Protocol/ConsoleControl/ConsoleControl.h I've found that the simplest way to run a UEFI app on a Mac is to do the following: - Format a USB thumb drive with a FAT32 filesystem on it. - Create a \EFI\BOOT directory on it - Copy your app to \EFI\BOOT\BOOTIA32.EFI (or BOOTX64.EFI, if you have a 64- bit build) on the drive - Plug the thumb drive into the Mac - Reboot it - Hold down the left ALT key on the keyboard as the machine starts up (try to hit it before or as soon as you hear the chime) - You should see a boot selection screen appear. There should be a yellow USB device icon labeled "EFI Boot" or something to that effect on the right side of the screen - Use the mouse to click on it, or use the arrow keys to select it and hit enter Your program should run. If you used the ConsoleControl example to switch the sceen mode, you should see the grey screen turn black and your console output should appear. -Bill > Andrew Fish wrote: > > On Feb 19, 2014, at 8:53 AM, Stephen Polkowski <step...@centtech.com> wrote: > >> Hi all, > >> > >> Does anyone know if the latest mac laptops have > >> > >> support for UEFI 2.0? I heard a rumor on the net that the Macbook Air > >> 2013 now has support for it. Older Macs supported EFI 1.0 or something > >> like it. > > > > All shipping Macs are EFI 1.10. > > > >> Thanks, > >> > >> Stephen > >> > >> > >> > >> ------------------------------------------------------------------------ > >> ------ Managing the Performance of Cloud-Based Applications > >> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > >> Read the Whitepaper. > >> http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.cl > >> ktrk _______________________________________________ > >> edk2-devel mailing list > >> edk2-devel@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/edk2-devel > > > > ------------------------------------------------------------------------- > > ----- Managing the Performance of Cloud-Based Applications > > Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > > Read the Whitepaper. > > http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clk > > trk _______________________________________________ > > edk2-devel mailing list > > edk2-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/edk2-devel -- ============================================================================= -Bill Paul (510) 749-2329 | Senior Member of Technical Staff, wp...@windriver.com | Master of Unix-Fu - Wind River Systems ============================================================================= "I put a dollar in a change machine. Nothing changed." - George Carlin ============================================================================= ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk _______________________________________________ edk2-devel mailing list edk2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/edk2-devel
