Hi,
I encountered some problems with Linux PPC on the AmigaOne. As you can see
in the /proc/interrupts output below, the AmigaOne has a i8259 PIC (no
OpenPIC). The first problem is, that the interrupts 7 and 10 are shown as
"Edge" triggered, but they're set to "Level" in the u-boot (firmware)
preferences. I'm not sure, if u-boot setups the interrupts, therefore I
added this code to the platform PCI initialisation code (copied from
prep_pci.c):
void __init
amigaone_pcibios_fixup(void)
{
/* IRQ 7 is level triggered. */
unsigned char irq_edge_mask_lo = 0x80;
/* IRQ, 9, 10, 11 is level triggered. */
unsigned char irq_edge_mask_hi = 0x07;
outb(inb(0x04d0)|irq_edge_mask_lo, 0x4d0); /* primary 8259 */
outb(inb(0x04d1)|irq_edge_mask_hi, 0x4d1); /* cascaded 8259 */
}
Unortunately this didn't help and the interrupts seem to be still "edge"
triggered.
/proc/interrupts:
CPU0
1: 189 i8259 Edge i8042
2: 0 i8259 Edge 82c59 secondary cascade
5: 0 i8259 Edge uhci_hcd, uhci_hcd
7: 546 i8259 Edge eth0
10: 0 i8259 Edge EMU10K1
12: 8217 i8259 Edge i8042
14: 19597 i8259 Edge ide0
15: 18951 i8259 Edge ide1
BAD: 2
The other issue are the 2 BAD interrupts shown above. Does this have to do
something with the "edge" or "level" triggered mode or is it a interrupt
routing problem?
Thanks!
Gerhard
Other infos:
/proc/ioports
00000000-00bfffff : PCI host bridge
00000000-0000001f : dma1
00000020-00000021 : 8259 (master)
00000040-0000005f : timer
00000060-0000006f : i8042
00000080-0000008f : dma page reg
000000a0-000000a1 : 8259 (slave)
000000c0-000000df : dma2
00000170-00000177 : ide1
000001f0-000001f7 : ide0
00000278-0000027a : parport2
000002f8-000002ff : serial
00000376-00000376 : ide1
00000378-0000037a : parport0
000003bc-000003be : parport1
000003c0-000003df : vga+
000003e8-000003ef : serial
000003f6-000003f6 : ide0
000003f8-000003ff : serial
000004d0-000004d1 : 8259 edge control
00002000-00002fff : PCI Bus #01
00002000-000020ff : 0000:01:00.0
0000cc00-0000cc0f : 0000:00:07.1
0000cc00-0000cc07 : ide0
0000cc08-0000cc0f : ide1
00802000-0080207f : 0000:00:06.0
00802000-0080207f : 0000:00:06.0
00802080-0080209f : 0000:00:07.2
00802080-0080209f : uhci_hcd
008020a0-008020bf : 0000:00:07.3
008020a0-008020bf : uhci_hcd
00802100-008021ff : 0000:00:07.5
00802200-00802203 : 0000:00:07.5
00802204-00802207 : 0000:00:07.5
00802300-008023ff : 0000:00:07.6
00802400-0080241f : 0000:00:09.0
00802400-0080241f : EMU10K1
00802420-00802427 : 0000:00:09.1
00802420-00802427 : emu10k1-gp
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