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fixed fetching BIOS ROM on (some?) laptops.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8912 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen 2004-09-11 09:46:27 +00:00
parent eab2037630
commit fc69f2f4f9
1 changed files with 14 additions and 3 deletions
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17
src/add-ons/kernel/drivers/graphics/nvidia/driver.c
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@ -4,7 +4,7 @@
Other authors:
Mark Watson;
Rudolf Cornelissen 3/2002-8/2004.
Rudolf Cornelissen 3/2002-9/2004.
*/
/* standard kernel driver stuff */
@ -483,7 +483,7 @@ static status_t map_device(device_info *di)
// #define G400_DMA_BUFFER_SIZE 1024*1024
/* variables for making copy of ROM */
char * rom_temp;
uint8* rom_temp;
area_id rom_area;
/* Nvidia cards have registers in [0] and framebuffer in [1] */
@ -560,8 +560,19 @@ static status_t map_device(device_info *di)
B_READ_AREA,
(void **)&(rom_temp)
);
/* check if we got the BIOS signature (might fail on laptops..) */
if (rom_temp[0]!=0x55 || rom_temp[1]!=0xaa)
{
/* apparantly no ROM is mapped here */
delete_area(rom_area);
rom_area = -1;
/* force using ISA legacy map as fall-back */
tmpUlong = 0x00000000;
}
}
else
if (!tmpUlong)
{
/* ROM was not assigned an adress, fetch it from ISA legacy memory map! */
rom_area = map_physical_memory(