Hi Markus,
Markus Rathgeb wrote:
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Then I added the following lines to u-boot configuration file for phyCORE-MPC5200B-tiny:
#define CONFIG_VIDEO #ifdef CONFIG_VIDEO #define CONFIG_BIOSEMU /* x86 bios emulator for vga bios */ #define CONFIG_ATI_RADEON_FB /* use radeon framebuffer driver */ #define VIDEO_IO_OFFSET CONFIG_PCI_IO_BUS #define CONFIG_SYS_ISA_IO_BASE_ADDRESS VIDEO_IO_OFFSET #define CONFIG_VIDEO_SW_CURSOR #define CONFIG_VIDEO_LOGO #define CONFIG_CFB_CONSOLE #define CONFIG_SPLASH_SCREEN #define CONFIG_VGA_AS_SINGLE_DEVICE #define CONFIG_CMD_BMP #endif
(Is VIDEO_IO_OFFSET okay? Is CONFIG_SYS_ISA_IO_BASE_ADDRESS needed?)
VIDEO_IO_OFFSET seems to be Ok. CONFIG_SYS_ISA_IO_BASE_ADDRESS is not really needed, but ati_radeon_fb.c driver can't be compiled without it currently.
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I prepare to find the line that is responsible and believe it is in the file './video/ati_radeon_fb.c' in the function 'void *video_hw_init(void)' When the video memory will be accessed.
/* Clear video memory (only visible screen area) */ i = pGD->winSizeX * pGD->winSizeY * pGD->gdfBytesPP / 4; vm = (unsigned int *) pGD->pciBase; while (i--) *vm++ = 0; <-- HERE !!
So, what can I do?
Try to define CONFIG_PCI_IO_BUS and CONFIG_PCI_IO_PHYS in 'include/configs/pcm030.h' as follows:
#define CONFIG_PCI_IO_BUS 0x00000000 #define CONFIG_PCI_IO_PHYS 0x50000000
Best regards, Anatolij